Update package_esp32_index.template.json

Summary

Only affects ETH (not WiFi)

This PR solves #5733 by allowing the DHCP IDF server to complete its tasks and only then it sets a static IP.
This also solves another related failure reported in this issue (#5733 (comment)).

fix #5733

Impact

Adds a delay in order to wait for DHCP to actually terminate before setting the static IP configuration in ETH.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,16 @@
+----------------------------------------------------------------------------------------------------------------------------------------------------
+This entire section can be deleted if all items are checked.
+
+*By completing this PR sufficiently, you help us to improve the quality of Release Notes*
+
+### Checklist
+
+1. [ ] Please provide specific title of the PR describing the change, including the component name (eg."Update of Documentation link on Readme.md")
+2. [ ] Please provide related links (eg. Issue, other Project, submodule PR..)
+----------------------------------------------------------------------------------------------------------------------------------------------------
+
+## Summary
+Please describe your proposed PR and what it contains.
+
+## Impact
+Please describe impact of your PR and it's function.

.github/scripts/check-cmakelists.sh

@@ -15,7 +15,7 @@ git submodule update --init --recursive
 REPO_SRCS=`find cores/esp32/ libraries/ -name 'examples' -prune -o -name '*.c' -print -o -name '*.cpp' -print | sort`
 
 # find all source files named in CMakeLists.txt COMPONENT_SRCS
-CMAKE_SRCS=`cmake --trace-expand -C CMakeLists.txt 2>&1 | grep set\(srcs | cut -d'(' -f3 | sed 's/ )//' | sed 's/srcs //' | tr ' ;' '\n' | sort`
+CMAKE_SRCS=`cmake --trace-expand -P CMakeLists.txt 2>&1 | grep set\(srcs | cut -d'(' -f3 | sed 's/ )//' | sed 's/srcs //' | tr ' ;' '\n' | sort`
 
 if ! diff -u0 --label "Repo Files" --label "srcs" <(echo "$REPO_SRCS") <(echo "$CMAKE_SRCS"); then
     echo "Source files in repo (-) and source files in CMakeLists.txt (+) don't match"

.github/scripts/install-arduino-ide.sh

@@ -98,8 +98,8 @@ function build_sketch(){ # build_sketch <fqbn> <path-to-ino> [extra-options]
 		win_opts="-prefs=runtime.tools.ctags.path=$ARDUINO_IDE_PATH/tools-builder/ctags/$ctags_version -prefs=runtime.tools.arduino-preprocessor.path=$ARDUINO_IDE_PATH/tools-builder/arduino-preprocessor/$preprocessor_version"
 	fi
 
-	echo ""
-	echo "Compiling '"$(basename "$sketch")"' ..."
+	#echo ""
+	#echo "Compiling '"$(basename "$sketch")"' ..."
 	mkdir -p "$ARDUINO_BUILD_DIR"
 	mkdir -p "$ARDUINO_CACHE_DIR"
 	$ARDUINO_IDE_PATH/arduino-builder -compile -logger=human -core-api-version=10810 \
@@ -131,14 +131,14 @@ function count_sketches() # count_sketches <examples-path> <target-mcu>
         local sketchdir=$(dirname $sketch)
         local sketchdirname=$(basename $sketchdir)
         local sketchname=$(basename $sketch)
-        if [[ "${sketchdirname}.ino" != "$sketchname" ]]; then
+        if [[ "$sketchdirname.ino" != "$sketchname" ]]; then
             continue
-        fi;
-        if [[ -f "$sketchdir/.skip.$target" ]]; then
+        elif [[ -f "$sketchdir/.skip.$target" ]]; then
             continue
+        else
+        	echo $sketch >> sketches.txt
+        	sketchnum=$(($sketchnum + 1))
         fi
-        echo $sketch >> sketches.txt
-        sketchnum=$(($sketchnum + 1))
     done
     return $sketchnum
 }
@@ -168,13 +168,13 @@ function build_sketches() # build_sketches <fqbn> <target-mcu> <examples-path> <
 		echo "ERROR: Chunks count must be positive number"
 		return 1
 	fi
-	if [ "$chunk_idex" -ge "$chunks_num" ]; then
+	if [ "$chunk_idex" -ge "$chunks_num" ] && [ "$chunks_num" -ge 2 ]; then
 		echo "ERROR: Chunk index must be less than chunks count"
 		return 1
 	fi
 
 	set +e
-    count_sketches "$examples"
+    count_sketches "$examples" "$target"
     local sketchcount=$?
 	set -e
     local sketches=$(cat sketches.txt)
@@ -186,19 +186,27 @@ function build_sketches() # build_sketches <fqbn> <target-mcu> <examples-path> <
     	chunk_size=$(( $chunk_size + 1 ))
     fi
 
-    local start_index=$(( $chunk_idex * $chunk_size ))
-    if [ "$sketchcount" -le "$start_index" ]; then
-    	echo "Skipping job"
-    	return 0
-    fi
-
-    local end_index=$(( $(( $chunk_idex + 1 )) * $chunk_size ))
-    if [ "$end_index" -gt "$sketchcount" ]; then
+    local start_index=0
+    local end_index=0
+    if [ "$chunk_idex" -ge "$chunks_num" ]; then
+    	start_index=$chunk_idex
     	end_index=$sketchcount
-    fi
+    else
+	    start_index=$(( $chunk_idex * $chunk_size ))
+	    if [ "$sketchcount" -le "$start_index" ]; then
+	    	echo "Skipping job"
+	    	return 0
+	    fi
+
+	    end_index=$(( $(( $chunk_idex + 1 )) * $chunk_size ))
+	    if [ "$end_index" -gt "$sketchcount" ]; then
+	    	end_index=$sketchcount
+	    fi
+	fi
 
     local start_num=$(( $start_index + 1 ))
-    echo "Found $sketchcount Sketches";
+    echo "Found $sketchcount Sketches for target '$target'";
+    echo "Chunk Index : $chunk_idex"
     echo "Chunk Count : $chunks_num"
     echo "Chunk Size  : $chunk_size"
     echo "Start Sketch: $start_num"
@@ -218,6 +226,8 @@ function build_sketches() # build_sketches <fqbn> <target-mcu> <examples-path> <
         || [ "$sketchnum" -gt "$end_index" ]; then
         	continue
         fi
+        echo ""
+        echo "Building Sketch Index $(($sketchnum - 1)) - $sketchdirname"
         build_sketch "$fqbn" "$sketch" "$xtra_opts"
         local result=$?
         if [ $result -ne 0 ]; then

.github/scripts/install-platformio-esp32.sh

@@ -1,19 +1,43 @@
 #!/bin/bash
 
 export PLATFORMIO_ESP32_PATH="$HOME/.platformio/packages/framework-arduinoespressif32"
-PLATFORMIO_ESP32_URL="https://github.com/platformio/platform-espressif32.git#feature/idf-v4.0"
+PLATFORMIO_ESP32_URL="https://github.com/platformio/platform-espressif32.git#feature/arduino-idf-master"
+
+XTENSA32_TOOLCHAIN_VERSION="8.4.0+2021r1"
+XTENSA32S2_TOOLCHAIN_VERSION="8.4.0+2021r1"
+RISCV_TOOLCHAIN_VERSION="8.4.0+2021r1"
+ESPTOOLPY_VERSION="~1.30100.0"
+ESPRESSIF_ORGANIZATION_NAME="espressif"
 
 echo "Installing Python Wheel ..."
 pip install wheel > /dev/null 2>&1
 
 echo "Installing PlatformIO ..."
-pip install -U https://github.com/platformio/platformio/archive/develop.zip > /dev/null 2>&1
+pip install -U https://github.com/platformio/platformio/archive/master.zip > /dev/null 2>&1
 
 echo "Installing Platform ESP32 ..."
-python -m platformio platform install $PLATFORMIO_ESP32_URL > /dev/null 2>&1
+python -m platformio platform install $PLATFORMIO_ESP32_URL  > /dev/null 2>&1
 
-echo "Replacing the framework version ..."
-python -c "import json; import os; fp=open(os.path.expanduser('~/.platformio/platforms/espressif32/platform.json'), 'r+'); data=json.load(fp); data['packages']['framework-arduinoespressif32']['version'] = '*'; fp.seek(0); fp.truncate(); json.dump(data, fp); fp.close()"
+echo "Replacing the package versions ..."
+replace_script="import json; import os;"
+replace_script+="fp=open(os.path.expanduser('~/.platformio/platforms/espressif32/platform.json'), 'r+');"
+replace_script+="data=json.load(fp);"
+# Use framework sources from the repository
+replace_script+="data['packages']['framework-arduinoespressif32']['version'] = '*';"
+replace_script+="del data['packages']['framework-arduinoespressif32']['owner'];"
+# Use toolchain packages from the "espressif" organization
+replace_script+="data['packages']['toolchain-xtensa-esp32']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+replace_script+="data['packages']['toolchain-xtensa-esp32s2']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+replace_script+="data['packages']['toolchain-riscv32-esp']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+# Update versions to use the upstream
+replace_script+="data['packages']['toolchain-xtensa-esp32']['version']='$XTENSA32_TOOLCHAIN_VERSION';"
+replace_script+="data['packages']['toolchain-xtensa-esp32s2']['version']='$XTENSA32S2_TOOLCHAIN_VERSION';"
+replace_script+="data['packages']['toolchain-riscv32-esp']['version']='$RISCV_TOOLCHAIN_VERSION';"
+# esptool.py may require an upstream version (for now platformio is the owner)
+replace_script+="data['packages']['tool-esptoolpy']['version']='$ESPTOOLPY_VERSION';"
+# Save results
+replace_script+="fp.seek(0);fp.truncate();json.dump(data, fp, indent=2);fp.close()"
+python -c "$replace_script"
 
 if [ "$GITHUB_REPOSITORY" == "espressif/arduino-esp32" ];  then
 	echo "Linking Core..."

.github/scripts/on-pages.sh

@@ -85,47 +85,59 @@ function git_safe_upload_to_pages(){
     return $?
 }
 
-EVENT_JSON=`cat $GITHUB_EVENT_PATH`
+git_safe_upload_to_pages "index.md" "README.md"
 
-pages_added=`echo "$EVENT_JSON" | jq -r '.commits[].added[]'`
-pages_modified=`echo "$EVENT_JSON" | jq -r '.commits[].modified[]'`
-pages_removed=`echo "$EVENT_JSON" | jq -r '.commits[].removed[]'`
+# At some point github stopped providing a list of edited file
+# but we also stopped havong documentation in md format,
+# so we can skip this portion safely and update just the index
 
-for page in $pages_added; do
-    if [[ $page != "README.md" && $page != "docs/"* ]]; then
-        continue
-    fi
-    echo "Adding '$page' to pages ..."
-    if [[ $page == "README.md" ]]; then
-        git_safe_upload_to_pages "index.md" "README.md"
-    else
-        git_safe_upload_to_pages "$page" "$page"
-    fi
-done
+# EVENT_JSON=`cat $GITHUB_EVENT_PATH`
 
-for page in $pages_modified; do
-    if [[ $page != "README.md" && $page != "docs/"* ]]; then
-        continue
-    fi
-    echo "Modifying '$page' ..."
-    if [[ $page == "README.md" ]]; then
-        git_safe_upload_to_pages "index.md" "README.md"
-    else
-        git_safe_upload_to_pages "$page" "$page"
-    fi
-done
+# echo "GITHUB_EVENT_PATH: $GITHUB_EVENT_PATH"
+# echo "EVENT_JSON: $EVENT_JSON"
 
-for page in $pages_removed; do
-    if [[ $page != "README.md" && $page != "docs/"* ]]; then
-        continue
-    fi
-    echo "Removing '$page' from pages ..."
-    if [[ $page == "README.md" ]]; then
-        git_remove_from_pages "README.md" > /dev/null
-    else
-        git_remove_from_pages "$page" > /dev/null
-    fi
-done
+# pages_added=`echo "$EVENT_JSON" | jq -r '.commits[].added[]'`
+# echo "added: $pages_added"
+# pages_modified=`echo "$EVENT_JSON" | jq -r '.commits[].modified[]'`
+# echo "modified: $pages_modified"
+# pages_removed=`echo "$EVENT_JSON" | jq -r '.commits[].removed[]'`
+# echo "removed: $pages_removed"
+
+# for page in $pages_added; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Adding '$page' to pages ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_safe_upload_to_pages "index.md" "README.md"
+#     else
+#         git_safe_upload_to_pages "$page" "$page"
+#     fi
+# done
+
+# for page in $pages_modified; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Modifying '$page' ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_safe_upload_to_pages "index.md" "README.md"
+#     else
+#         git_safe_upload_to_pages "$page" "$page"
+#     fi
+# done
+
+# for page in $pages_removed; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Removing '$page' from pages ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_remove_from_pages "README.md" > /dev/null
+#     else
+#         git_remove_from_pages "$page" > /dev/null
+#     fi
+# done
 
 echo
 echo "DONE!"

.github/scripts/on-push.sh

@@ -24,7 +24,7 @@ BUILD_PIO=0
 if [ "$#" -lt 2 ] || [ "$CHUNKS_CNT" -le 0 ]; then
 	CHUNK_INDEX=0
 	CHUNKS_CNT=1
-elif [ "$CHUNK_INDEX" -gt "$CHUNKS_CNT" ]; then
+elif [ "$CHUNK_INDEX" -gt "$CHUNKS_CNT" ] &&  [ "$CHUNKS_CNT" -ge 2 ]; then
 	CHUNK_INDEX=$CHUNKS_CNT
 elif [ "$CHUNK_INDEX" -eq "$CHUNKS_CNT" ]; then
 	BUILD_PIO=1
@@ -69,6 +69,19 @@ if [ "$BUILD_PIO" -eq 0 ]; then
 	else
 		build_sketches "$FQBN" "$TARGET" "$ARDUINO_ESP32_PATH/libraries" "$CHUNK_INDEX" "$CHUNKS_CNT"
     fi
+
+	# ArduinoIDE ESP32C3 Test
+    TARGET="esp32c3"
+	FQBN="espressif:esp32:esp32c3:PartitionScheme=huge_app"
+	if [ "$OS_IS_WINDOWS" == "1" ]; then
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/WiFi/examples/WiFiClient/WiFiClient.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino"
+	elif [ "$OS_IS_MACOS" == "1" ]; then
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/WiFi/examples/WiFiClient/WiFiClient.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino"
+	else
+		build_sketches "$FQBN" "$TARGET" "$ARDUINO_ESP32_PATH/libraries" "$CHUNK_INDEX" "$CHUNKS_CNT"
+    fi
 else
 	source ./.github/scripts/install-platformio-esp32.sh
 	# PlatformIO ESP32 Test

.github/scripts/on-release.sh

@@ -183,6 +183,7 @@ cp -f  "$GITHUB_WORKSPACE/tools/gen_esp32part.py"  "$PKG_DIR/tools/"
 cp -f  "$GITHUB_WORKSPACE/tools/gen_esp32part.exe" "$PKG_DIR/tools/"
 cp -Rf "$GITHUB_WORKSPACE/tools/partitions"        "$PKG_DIR/tools/"
 cp -Rf "$GITHUB_WORKSPACE/tools/sdk"               "$PKG_DIR/tools/"
+cp -f  $GITHUB_WORKSPACE/tools/platformio-build*.py "$PKG_DIR/tools/"
 
 # Remove unnecessary files in the package folder
 echo "Cleaning up folders ..."
@@ -194,6 +195,7 @@ echo "Generating platform.txt..."
 cat "$GITHUB_WORKSPACE/platform.txt" | \
 sed "s/version=.*/version=$ver$extent/g" | \
 sed 's/runtime.tools.xtensa-esp32-elf-gcc.path={runtime.platform.path}\/tools\/xtensa-esp32-elf//g' | \
+sed 's/runtime.tools.xtensa-esp32s2-elf-gcc.path={runtime.platform.path}\/tools\/xtensa-esp32s2-elf//g' | \
 sed 's/tools.esptool_py.path={runtime.platform.path}\/tools\/esptool/tools.esptool_py.path=\{runtime.tools.esptool_py.path\}/g' \
  > "$PKG_DIR/platform.txt"
 
@@ -254,17 +256,30 @@ releasesJson=`curl -sH "Authorization: token $GITHUB_TOKEN" "https://api.github.
 if [ $? -ne 0 ]; then echo "ERROR: Get Releases Failed! ($?)"; exit 1; fi
 
 set +e
-prev_release=$(echo "$releasesJson" | jq -e -r '. | map(select(.draft == false and .prerelease == false)) | sort_by(.created_at | - fromdateiso8601) | .[0].tag_name')
-prev_any_release=$(echo "$releasesJson" | jq -e -r '. | map(select(.draft == false)) | sort_by(.created_at | - fromdateiso8601)  | .[0].tag_name')
+prev_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false)) | sort_by(.published_at | - fromdateiso8601) | .[0].tag_name")
+prev_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false)) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
+prev_branch_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
+prev_branch_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
 shopt -s nocasematch
-if [ "$prev_any_release" == "$RELEASE_TAG" ]; then
-    prev_release=$(echo "$releasesJson" | jq -e -r '. | map(select(.draft == false and .prerelease == false)) | sort_by(.created_at | - fromdateiso8601) | .[1].tag_name')
-    prev_any_release=$(echo "$releasesJson" | jq -e -r '. | map(select(.draft == false)) | sort_by(.created_at | - fromdateiso8601)  | .[1].tag_name')
+if [ "$prev_release" == "$RELEASE_TAG" ]; then
+    prev_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false)) | sort_by(.published_at | - fromdateiso8601) | .[1].tag_name")
+fi
+if [ "$prev_any_release" == "$RELEASE_TAG" ]; then
+    prev_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false)) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
+fi
+if [ "$prev_branch_release" == "$RELEASE_TAG" ]; then
+    prev_branch_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
+fi
+if [ "$prev_branch_any_release" == "$RELEASE_TAG" ]; then
+    prev_branch_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
 fi
-COMMITS_SINCE_RELEASE="$prev_any_release"
 shopt -u nocasematch
 set -e
 
+echo "Previous Release: $prev_release"
+echo "Previous (any)release: $prev_any_release"
+echo
+
 # Merge package JSONs with previous releases
 if [ ! -z "$prev_any_release" ] && [ "$prev_any_release" != "null" ]; then
     echo "Merging with JSON from $prev_any_release ..."
@@ -272,17 +287,12 @@ if [ ! -z "$prev_any_release" ] && [ "$prev_any_release" != "null" ]; then
 fi
 
 if [ "$RELEASE_PRE" == "false" ]; then
-    COMMITS_SINCE_RELEASE="$prev_release"
     if [ ! -z "$prev_release" ] && [ "$prev_release" != "null" ]; then
         echo "Merging with JSON from $prev_release ..."
         merge_package_json "$prev_release/$PACKAGE_JSON_REL" "$OUTPUT_DIR/$PACKAGE_JSON_REL"
     fi
 fi
 
-echo "Previous Release: $prev_release"
-echo "Previous (any)release: $prev_any_release"
-echo
-
 # Upload package JSONs
 echo "Uploading $PACKAGE_JSON_DEV ..."
 echo "Download URL: "`git_safe_upload_asset "$OUTPUT_DIR/$PACKAGE_JSON_DEV"`
@@ -327,21 +337,35 @@ if [ $arrLen > 3 ] && [ "${msgArray[0]:0:3}" == "tag" ]; then
 fi
 
 # Append Commit Messages
+echo
+echo "Previous Branch Release: $prev_branch_release"
+echo "Previous Branch (any)release: $prev_branch_any_release"
+echo
+commitFile="$OUTPUT_DIR/commits.txt"
+COMMITS_SINCE_RELEASE="$prev_branch_any_release"
+if [ "$RELEASE_PRE" == "false" ]; then
+    COMMITS_SINCE_RELEASE="$prev_branch_release"
+fi
 if [ ! -z "$COMMITS_SINCE_RELEASE" ] && [ "$COMMITS_SINCE_RELEASE" != "null" ]; then
     echo "Getting commits since $COMMITS_SINCE_RELEASE ..."
-    commitFile=$OUTPUT_DIR/commits.txt
-    git -C "$GITHUB_WORKSPACE" log --oneline "$COMMITS_SINCE_RELEASE..HEAD" > "$OUTPUT_DIR/commits.txt"
-    releaseNotes+=$'\r\n##### Commits\r\n'
-    IFS=$'\n'
-    for next in `cat $commitFile`
-    do
-        IFS=' ' read -r commitId commitMsg <<< "$next"
-        commitLine="- [$commitId](https://github.com/$GITHUB_REPOSITORY/commit/$commitId) $commitMsg"
-        releaseNotes+="$commitLine"
-        releaseNotes+=$'\r\n'
-    done
-    rm -f $commitFile
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 "$COMMITS_SINCE_RELEASE..HEAD" > "$commitFile"
+elif [ "$RELEASE_BRANCH" != "master" ]; then
+    echo "Getting all commits on branch '$RELEASE_BRANCH' ..."
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 --cherry-pick --left-only --no-merges HEAD...origin/master > "$commitFile"
+else
+    echo "Getting all commits on master ..."
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 --no-merges > "$commitFile"
 fi
+releaseNotes+=$'\r\n##### Commits\r\n'
+IFS=$'\n'
+for next in `cat $commitFile`
+do
+    IFS=' ' read -r commitId commitMsg <<< "$next"
+    commitLine="- [$commitId](https://github.com/$GITHUB_REPOSITORY/commit/$commitId) $commitMsg"
+    releaseNotes+="$commitLine"
+    releaseNotes+=$'\r\n'
+done
+rm -f $commitFile
 
 # Prepend the original release body
 if [ "${RELEASE_BODY: -1}" == $'\r' ]; then         

.github/stale.yml

@@ -1,64 +1,26 @@
-# Configuration for probot-stale - https://github.com/probot/stale
+# This workflow firstly warns and then closes issues that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information can be found here: https://github.com/actions/stale
 
-# Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 60
+name: Mark stale issues
+on:
+  schedule:
+  - cron: '30 9 * * *'
 
-# Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
-# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
-daysUntilClose: 14
+jobs:
+  stale:
 
-# Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
-onlyLabels: []
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write  
 
-# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
-exemptLabels:
-  - pinned
-  - security
-  - "to be implemented"
-  - "for reference"
-  - "move to PR"
-  - "enhancement"
-
-# Set to true to ignore issues in a project (defaults to false)
-exemptProjects: false
-
-# Set to true to ignore issues in a milestone (defaults to false)
-exemptMilestones: false
-
-# Set to true to ignore issues with an assignee (defaults to false)
-exemptAssignees: false
-
-# Label to use when marking as stale
-staleLabel: stale
-
-# Comment to post when marking as stale. Set to `false` to disable
-markComment: >
-  [STALE_SET] This issue has been automatically marked as stale because it has not had
-  recent activity. It will be closed in 14 days if no further activity occurs. Thank you
-  for your contributions.
-
-# Comment to post when removing the stale label.
-unmarkComment: >
-  [STALE_CLR] This issue has been removed from the stale queue. Please ensure activity to keep it openin the future.
-
-# Comment to post when closing a stale Issue or Pull Request.
-closeComment: >
-  [STALE_DEL] This stale issue has been automatically closed. Thank you for your contributions.
-
-# Limit the number of actions per hour, from 1-30. Default is 30
-limitPerRun: 30
-
-# Limit to only `issues` or `pulls`
-only: issues
-
-# Optionally, specify configuration settings that are specific to just 'issues' or 'pulls':
-# pulls:
-#   daysUntilStale: 30
-#   markComment: >
-#     This pull request has been automatically marked as stale because it has not had
-#     recent activity. It will be closed if no further activity occurs. Thank you
-#     for your contributions.
-
-# issues:
-#   exemptLabels:
-#     - confirmed
+    steps:
+    - uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.'
+        days-before-stale: 60
+        days-before-close: 14
+        exempt-issue-labels: 'Type: For reference,Type: To be implemented,Type: Feature request'
+        stale-issue-label: 'Status: Stale'

.github/workflows/docs.yml

@@ -0,0 +1,38 @@
+name: ReadTheDocs CI
+
+on:
+  push:
+    branches:
+    - master
+    - release/*
+    paths:
+    - 'docs/**'
+    - '.github/workflows/docs.yml'
+  pull_request:
+    paths:
+    - 'docs/**'
+    - '.github/workflows/docs.yml'
+
+jobs:
+
+  build-docs:
+    name: Build ReadTheDocs
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Build
+      run: |
+        sudo apt update
+        sudo apt install python3-pip python3-setuptools
+        # GitHub CI installs pip3 and setuptools outside the path.
+        # Update the path to include them and run.
+        PATH=/home/runner/.local/bin:$PATH pip3 install --user -r ./docs/requirements.txt
+        cd ./docs && PATH=/home/runner/.local/bin:$PATH SPHINXOPTS="-W" make html

.github/workflows/gh-pages.yml

@@ -4,9 +4,11 @@ on:
   push:
     branches:
     - master
+    - pages
     paths:
     - 'README.md'
-    - 'docs/**'
+    - '.github/scripts/on-pages.sh'
+    - '.github/workflows/gh-pages.yml'
 
 jobs:
 

.github/workflows/release.yml

@@ -11,6 +11,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@master
+      with:
+        fetch-depth: 0
     - uses: actions/setup-python@v1
       with:
         python-version: '3.x'

.github/workflows/test_selfhosted_runner.yml

@@ -0,0 +1,27 @@
+name: Test Github action on self hosted RPI runnes
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+
+jobs:
+  build:
+    name: Dummy test - self hosted GHR
+    runs-on: self-hosted
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v2
+      - name: Test message 1
+        run: echo "This is test message"
+      - name: Test message 2
+        run: echo "This is test message2"
+      - name: List directory
+        run: ls
+      - name: Create copy of README
+        run: cp README.md README2.md
+      - name: Read README2
+        run: cat README2.md
+      - name: Delete README2
+        run: rm README2.md

.gitignore

@@ -1,10 +1,12 @@
 tools/xtensa-esp32-elf
 tools/xtensa-esp32s2-elf
+tools/riscv32-esp-elf
 tools/dist
 tools/esptool
 tools/esptool.exe
-tools/mkspiffs/mkspiffs
-tools/mkspiffs/mkspiffs.exe
+tools/mkspiffs
+tools/mklittlefs
+tools/mkfatfs.exe
 .DS_Store
  
 #Ignore files built by Visual Studio/Visual Micro
@@ -16,4 +18,7 @@ __vm/
 .vscode/
 platform.sloeber.txt
 boards.sloeber.txt
-tools/mklittlefs
+
+# Ignore docs build (Sphinx)
+docs/build
+docs/source/_build

CMakeLists.txt

@@ -1,49 +1,248 @@
+# Check ESP-IDF version and error out if it is not in the supported range.
+#
+# Note for arduino-esp32 developers: to bypass the version check locally,
+# set ARDUINO_SKIP_IDF_VERSION_CHECK environment variable to 1. For example:
+#   export ARDUINO_SKIP_IDF_VERSION_CHECK=1
+#   idf.py build
+
+set(min_supported_idf_version "4.4.0")
+set(max_supported_idf_version "4.4.99")
+set(idf_version "${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}.${IDF_VERSION_PATCH}")
+
+if ("${idf_version}" AND NOT "$ENV{ARDUINO_SKIP_IDF_VERSION_CHECK}")
+  if (idf_version VERSION_LESS min_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but an older version is detected: ${idf_version}.")
+  endif()
+  if (idf_version VERSION_GREATER max_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but a newer version is detected: ${idf_version}.")
+  endif()
+endif()
+
 set(CORE_SRCS
+  cores/esp32/base64.cpp
+  cores/esp32/cbuf.cpp
   cores/esp32/esp32-hal-adc.c
+  cores/esp32/esp32-hal-bt.c
   cores/esp32/esp32-hal-cpu.c
   cores/esp32/esp32-hal-dac.c
   cores/esp32/esp32-hal-gpio.c
   cores/esp32/esp32-hal-i2c.c
+  cores/esp32/esp32-hal-i2c-slave.c
   cores/esp32/esp32-hal-ledc.c
   cores/esp32/esp32-hal-matrix.c
   cores/esp32/esp32-hal-misc.c
   cores/esp32/esp32-hal-psram.c
   cores/esp32/esp32-hal-sigmadelta.c
   cores/esp32/esp32-hal-spi.c
+  cores/esp32/esp32-hal-time.c
+  cores/esp32/esp32-hal-timer.c
   cores/esp32/esp32-hal-tinyusb.c
   cores/esp32/esp32-hal-touch.c
+  cores/esp32/esp32-hal-uart.c
   cores/esp32/esp32-hal-rmt.c
+  cores/esp32/Esp.cpp
   cores/esp32/FunctionalInterrupt.cpp
+  cores/esp32/HardwareSerial.cpp
+  cores/esp32/IPAddress.cpp
+  cores/esp32/IPv6Address.cpp
+  cores/esp32/libb64/cdecode.c
+  cores/esp32/libb64/cencode.c
+  cores/esp32/main.cpp
+  cores/esp32/MD5Builder.cpp
+  cores/esp32/Print.cpp
   cores/esp32/stdlib_noniso.c
+  cores/esp32/Stream.cpp
+  cores/esp32/StreamString.cpp
+  cores/esp32/HWCDC.cpp
   cores/esp32/USB.cpp
   cores/esp32/USBCDC.cpp
+  cores/esp32/USBMSC.cpp
+  cores/esp32/FirmwareMSC.cpp
+  cores/esp32/firmware_msc_fat.c
   cores/esp32/wiring_pulse.c
   cores/esp32/wiring_shift.c
   cores/esp32/WMath.cpp
+  cores/esp32/WString.cpp
   )
 
 set(LIBRARY_SRCS
+  libraries/ArduinoOTA/src/ArduinoOTA.cpp
+  libraries/AsyncUDP/src/AsyncUDP.cpp
+  libraries/BluetoothSerial/src/BluetoothSerial.cpp
+  libraries/BluetoothSerial/src/BTAddress.cpp
+  libraries/BluetoothSerial/src/BTAdvertisedDeviceSet.cpp
+  libraries/BluetoothSerial/src/BTScanResultsSet.cpp
+  libraries/DNSServer/src/DNSServer.cpp
+  libraries/EEPROM/src/EEPROM.cpp
+  libraries/ESPmDNS/src/ESPmDNS.cpp
+  libraries/Ethernet/src/ETH.cpp
+  libraries/FFat/src/FFat.cpp
+  libraries/FS/src/FS.cpp
+  libraries/FS/src/vfs_api.cpp
+  libraries/HTTPClient/src/HTTPClient.cpp
+  libraries/HTTPUpdate/src/HTTPUpdate.cpp
+  libraries/LittleFS/src/LittleFS.cpp
+  libraries/NetBIOS/src/NetBIOS.cpp
+  libraries/Preferences/src/Preferences.cpp
+  libraries/RainMaker/src/RMaker.cpp
+  libraries/RainMaker/src/RMakerNode.cpp
+  libraries/RainMaker/src/RMakerParam.cpp
+  libraries/RainMaker/src/RMakerDevice.cpp
+  libraries/RainMaker/src/RMakerType.cpp
+  libraries/SD_MMC/src/SD_MMC.cpp
+  libraries/SD/src/SD.cpp
+  libraries/SD/src/sd_diskio.cpp
+  libraries/SD/src/sd_diskio_crc.c
+  libraries/SimpleBLE/src/SimpleBLE.cpp
+  libraries/SPIFFS/src/SPIFFS.cpp
   libraries/SPI/src/SPI.cpp
+  libraries/Ticker/src/Ticker.cpp
+  libraries/Update/src/Updater.cpp
+  libraries/Update/src/HttpsOTAUpdate.cpp
+  libraries/USB/src/USBHID.cpp
+  libraries/USB/src/USBHIDMouse.cpp
+  libraries/USB/src/USBHIDKeyboard.cpp
+  libraries/USB/src/USBHIDGamepad.cpp
+  libraries/USB/src/USBHIDConsumerControl.cpp
+  libraries/USB/src/USBHIDSystemControl.cpp
+  libraries/USB/src/USBHIDVendor.cpp
+  libraries/USB/src/USBVendor.cpp
+  libraries/WebServer/src/WebServer.cpp
+  libraries/WebServer/src/Parsing.cpp
+  libraries/WebServer/src/detail/mimetable.cpp
+  libraries/WiFiClientSecure/src/ssl_client.cpp
+  libraries/WiFiClientSecure/src/WiFiClientSecure.cpp
+  libraries/WiFi/src/WiFiAP.cpp
+  libraries/WiFi/src/WiFiClient.cpp
+  libraries/WiFi/src/WiFi.cpp
+  libraries/WiFi/src/WiFiGeneric.cpp
+  libraries/WiFi/src/WiFiMulti.cpp
+  libraries/WiFi/src/WiFiScan.cpp
+  libraries/WiFi/src/WiFiServer.cpp
+  libraries/WiFi/src/WiFiSTA.cpp
+  libraries/WiFi/src/WiFiUdp.cpp
+  libraries/WiFiProv/src/WiFiProv.cpp
   libraries/Wire/src/Wire.cpp
   )
 
+set(BLE_SRCS
+  libraries/BLE/src/BLE2902.cpp
+  libraries/BLE/src/BLE2904.cpp
+  libraries/BLE/src/BLEAddress.cpp
+  libraries/BLE/src/BLEAdvertisedDevice.cpp
+  libraries/BLE/src/BLEAdvertising.cpp
+  libraries/BLE/src/BLEBeacon.cpp
+  libraries/BLE/src/BLECharacteristic.cpp
+  libraries/BLE/src/BLECharacteristicMap.cpp
+  libraries/BLE/src/BLEClient.cpp
+  libraries/BLE/src/BLEDescriptor.cpp
+  libraries/BLE/src/BLEDescriptorMap.cpp
+  libraries/BLE/src/BLEDevice.cpp
+  libraries/BLE/src/BLEEddystoneTLM.cpp
+  libraries/BLE/src/BLEEddystoneURL.cpp
+  libraries/BLE/src/BLEExceptions.cpp
+  libraries/BLE/src/BLEHIDDevice.cpp
+  libraries/BLE/src/BLERemoteCharacteristic.cpp
+  libraries/BLE/src/BLERemoteDescriptor.cpp
+  libraries/BLE/src/BLERemoteService.cpp
+  libraries/BLE/src/BLEScan.cpp
+  libraries/BLE/src/BLESecurity.cpp
+  libraries/BLE/src/BLEServer.cpp
+  libraries/BLE/src/BLEService.cpp
+  libraries/BLE/src/BLEServiceMap.cpp
+  libraries/BLE/src/BLEUtils.cpp
+  libraries/BLE/src/BLEUUID.cpp
+  libraries/BLE/src/BLEValue.cpp
+  libraries/BLE/src/FreeRTOS.cpp
+  libraries/BLE/src/GeneralUtils.cpp
+  )
+
 
 set(includedirs
-  variants/esp32/
+  variants/${IDF_TARGET}/
   cores/esp32/
+  libraries/ArduinoOTA/src
+  libraries/AsyncUDP/src
+  libraries/BLE/src
+  libraries/BluetoothSerial/src
+  libraries/DNSServer/src
+  libraries/EEPROM/src
+  libraries/ESP32/src
+  libraries/ESPmDNS/src
+  libraries/FFat/src
+  libraries/FS/src
+  libraries/HTTPClient/src
+  libraries/HTTPUpdate/src
+  libraries/LittleFS/src
+  libraries/NetBIOS/src
+  libraries/Preferences/src
+  libraries/RainMaker/src
+  libraries/SD_MMC/src
+  libraries/SD/src
+  libraries/SimpleBLE/src
+  libraries/SPIFFS/src
   libraries/SPI/src
+  libraries/Ticker/src
+  libraries/Update/src
+  libraries/USB/src
+  libraries/WebServer/src
+  libraries/WiFiClientSecure/src
+  libraries/WiFi/src
+  libraries/WiFiProv/src
   libraries/Wire/src
   )
 
 set(srcs ${CORE_SRCS} ${LIBRARY_SRCS} ${BLE_SRCS})
-set(requires spi_flash mbedtls esp_adc_cal wifi_provisioning)
-set(priv_requires nvs_flash bootloader_support tinyusb espcpputils fmt)
+set(priv_includes cores/esp32/libb64)
+set(requires spi_flash mbedtls mdns esp_adc_cal wifi_provisioning nghttp)
+set(priv_requires fatfs nvs_flash app_update spiffs bootloader_support openssl bt esp_ipc esp_hid)
 
 idf_component_register(INCLUDE_DIRS ${includedirs} PRIV_INCLUDE_DIRS ${priv_includes} SRCS ${srcs} REQUIRES ${requires} PRIV_REQUIRES ${priv_requires})
 
-if(IDF_TARGET STREQUAL "esp32")
-target_compile_options(${COMPONENT_TARGET} PUBLIC -DARDUINO=10812 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DESP32)
+string(TOUPPER ${CONFIG_IDF_TARGET} idf_target_caps)
+target_compile_options(${COMPONENT_TARGET} PUBLIC
+    -DARDUINO=10812
+    -DARDUINO_${idf_target_caps}_DEV
+    -DARDUINO_ARCH_ESP32
+    -DARDUINO_BOARD="${idf_target_caps}_DEV"
+    -DARDUINO_VARIANT="${CONFIG_IDF_TARGET}"
+    -DESP32)
+
+if(CONFIG_AUTOSTART_ARDUINO)
+    # in autostart mode, arduino-esp32 contains app_main() function and needs to
+    # reference setup() and loop() in the main component. If we add main
+    # component to priv_requires then we create a large circular dependency
+    # (arduino-esp32 -> main -> arduino-esp32) and can get linker errors, so
+    # instead we add setup() and loop() to the undefined symbols list so the
+    # linker will always include them.
+    #
+    # (As they are C++ symbol, we need to add the C++ mangled names.)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u _Z5setupv -u _Z4loopv")
 endif()
-if(IDF_TARGET STREQUAL "esp32s2")
-target_compile_options(${COMPONENT_TARGET} PUBLIC -DARDUINO=10812 -DARDUINO_ESP32S2_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32S2_DEV" -DARDUINO_VARIANT="esp32s2" -DESP32)
+
+# This function adds a dependency on the given component if the component is included into the build.
+function(maybe_add_component component_name)
+    idf_build_get_property(components BUILD_COMPONENTS)
+    if (${component_name} IN_LIST components)
+        idf_component_get_property(lib_name ${component_name} COMPONENT_LIB)
+        target_link_libraries(${COMPONENT_LIB} PUBLIC ${lib_name})
+    endif()
+endfunction()
+
+if(IDF_TARGET MATCHES "esp32" AND CONFIG_ESP_RMAKER_TASK_STACK)
+    maybe_add_component(esp_rainmaker)
+    maybe_add_component(qrcode)
+endif()
+if(IDF_TARGET MATCHES "esp32s2|esp32s3" AND CONFIG_TINYUSB_ENABLED)
+    maybe_add_component(arduino_tinyusb)
+endif()
+if(NOT CONFIG_ARDUINO_SELECTIVE_COMPILATION OR CONFIG_ARDUINO_SELECTIVE_ArduinoOTA)
+    maybe_add_component(esp_https_ota)
+endif()
+if(NOT CONFIG_ARDUINO_SELECTIVE_COMPILATION OR CONFIG_ARDUINO_SELECTIVE_LITTLEFS)
+    maybe_add_component(esp_littlefs)
 endif()

CONTRIBUTING.rst

@@ -0,0 +1,50 @@
+Contributions Guide
+===================
+
+We welcome contributions to the Arduino ESP32 project!
+
+How to Contribute
+-----------------
+
+Contributions to Arduino ESP32 - fixing bugs, adding features, adding documentation - are welcome. We accept contributions via `Github Pull Requests <https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests>`_.
+
+Before Contributing
+-------------------
+
+Before sending us a Pull Request, please consider this list of points:
+
+* Is the contribution entirely your own work, or already licensed under an LGPL 2.1 compatible Open Source License? If not then we unfortunately cannot accept it.
+
+* Is the code adequately commented for people to understand how it is structured?
+
+* Is there documentation or examples that go with code contributions? 
+
+* Are comments and documentation written in clear English, with no spelling or grammar errors?
+
+* Example contributions are also welcome.
+
+* If the contribution contains multiple commits, are they grouped together into logical changes (one major change per pull request)? Are any commits with names like "fixed typo" `squashed into previous commits <https://eli.thegreenplace.net/2014/02/19/squashing-github-pull-requests-into-a-single-commit/>`_?
+
+* If you're unsure about any of these points, please open the Pull Request anyhow and then ask us for feedback.
+
+Pull Request Process
+--------------------
+
+After you open the Pull Request, there will probably be some discussion in the comments field of the request itself.
+
+Once the Pull Request is ready to merge, it will first be merged into our internal git system for in-house automated testing.
+
+If this process passes, it will be merged onto the public github repository.
+
+Legal Part
+----------
+
+Before a contribution can be accepted, you will need to sign our :doc:`contributor-agreement`. You will be prompted for this automatically as part of the Pull Request process.
+
+Related Documents
+-----------------
+
+.. toctree::
+    :maxdepth: 1
+
+        contributor-agreement

Kconfig.projbuild

@@ -9,6 +9,91 @@ config ENABLE_ARDUINO_DEPENDS
     select MEMMAP_SMP
     default "y"
 
+config AUTOSTART_ARDUINO
+    bool "Autostart Arduino setup and loop on boot"
+    default "n"
+    help
+        Enabling this option will implement app_main and start Arduino.
+        All you need to implement in your main.cpp is setup() and loop()
+        and include Arduino.h
+        If disabled, you can call initArduino() to run any preparations
+        required by the framework
+
+choice ARDUINO_RUNNING_CORE
+    bool "Core on which Arduino's setup() and loop() are running"
+    default ARDUINO_RUN_CORE1
+    help
+        Select on which core Arduino's setup() and loop() functions run
+
+    config ARDUINO_RUN_CORE0
+        bool "CORE 0"
+    config ARDUINO_RUN_CORE1
+        bool "CORE 1"
+    config ARDUINO_RUN_NO_AFFINITY
+        bool "BOTH"
+
+endchoice
+
+config ARDUINO_RUNNING_CORE
+    int
+    default 0 if ARDUINO_RUN_CORE0
+    default 1 if ARDUINO_RUN_CORE1
+    default -1 if ARDUINO_RUN_NO_AFFINITY
+
+config ARDUINO_LOOP_STACK_SIZE
+    int "Loop thread stack size"
+    default 8192
+    help
+        Amount of stack available for the Arduino task.
+
+choice ARDUINO_EVENT_RUNNING_CORE
+    bool "Core on which Arduino's event handler is running"
+    default ARDUINO_EVENT_RUN_CORE1
+    help
+        Select on which core Arduino's WiFi.onEvent() run
+
+    config ARDUINO_EVENT_RUN_CORE0
+        bool "CORE 0"
+    config ARDUINO_EVENT_RUN_CORE1
+        bool "CORE 1"
+    config ARDUINO_EVENT_RUN_NO_AFFINITY
+        bool "BOTH"
+
+endchoice
+
+config ARDUINO_EVENT_RUNNING_CORE
+    int
+    default 0 if ARDUINO_EVENT_RUN_CORE0
+    default 1 if ARDUINO_EVENT_RUN_CORE1
+    default -1 if ARDUINO_EVENT_RUN_NO_AFFINITY
+
+choice ARDUINO_UDP_RUNNING_CORE
+    bool "Core on which Arduino's UDP is running"
+    default ARDUINO_UDP_RUN_CORE1
+    help
+        Select on which core Arduino's UDP run
+
+    config ARDUINO_UDP_RUN_CORE0
+        bool "CORE 0"
+    config ARDUINO_UDP_RUN_CORE1
+        bool "CORE 1"
+    config ARDUINO_UDP_RUN_NO_AFFINITY
+        bool "BOTH"
+
+endchoice
+
+config ARDUINO_UDP_TASK_PRIORITY
+    int "Priority of the UDP task"
+    default 3
+    help
+        Select at what priority you want the UDP task to run.
+
+config ARDUINO_UDP_RUNNING_CORE
+    int
+    default 0 if ARDUINO_UDP_RUN_CORE0
+    default 1 if ARDUINO_UDP_RUN_CORE1
+    default -1 if ARDUINO_UDP_RUN_NO_AFFINITY
+
 config ARDUINO_ISR_IRAM
     bool "Run interrupts in IRAM"
     default "n"
@@ -78,15 +163,148 @@ config ARDUHAL_ESP_LOG
 
 endmenu
 
+choice ARDUHAL_PARTITION_SCHEME
+    bool "Used partition scheme"
+    default ARDUHAL_PARTITION_SCHEME_DEFAULT
+    help
+        Specify which partition scheme to be used.
+
+config ARDUHAL_PARTITION_SCHEME_DEFAULT
+    bool "Default"
+config ARDUHAL_PARTITION_SCHEME_MINIMAL
+    bool "Minimal (for 2MB FLASH)"
+config ARDUHAL_PARTITION_SCHEME_NO_OTA
+    bool "No OTA (for large apps)"
+config ARDUHAL_PARTITION_SCHEME_HUGE_APP
+    bool "Huge App (for very large apps)"
+config ARDUHAL_PARTITION_SCHEME_MIN_SPIFFS
+    bool "Minimal SPIFFS (for large apps with OTA)"
+endchoice
+
+config ARDUHAL_PARTITION_SCHEME
+    string
+    default "default" if ARDUHAL_PARTITION_SCHEME_DEFAULT
+    default "minimal" if ARDUHAL_PARTITION_SCHEME_MINIMAL
+    default "no_ota" if ARDUHAL_PARTITION_SCHEME_NO_OTA
+    default "huge_app" if ARDUHAL_PARTITION_SCHEME_HUGE_APP
+    default "min_spiffs" if ARDUHAL_PARTITION_SCHEME_MIN_SPIFFS
+
+
+config AUTOCONNECT_WIFI
+    bool "Autoconnect WiFi on boot"
+    default "n"
+    depends on AUTOSTART_ARDUINO
+    select ARDUINO_SELECTIVE_WiFi
+    help
+        If enabled, WiFi will connect to the last used SSID (if station was enabled),
+        else connection will be started only after calling WiFi.begin(ssid, password)
+
 config ARDUINO_SELECTIVE_COMPILATION
     bool "Include only specific Arduino libraries"
     default n
 
+config ARDUINO_SELECTIVE_ArduinoOTA
+    bool "Enable ArduinoOTA"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    select ARDUINO_SELECTIVE_ESPmDNS
+    default y
+
+config ARDUINO_SELECTIVE_AsyncUDP
+    bool "Enable AsyncUDP"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_AzureIoT
+    bool "Enable AzureIoT"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_HTTPClient
+    default y
+
+config ARDUINO_SELECTIVE_BLE
+    bool "Enable BLE"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_BluetoothSerial
+    bool "Enable BluetoothSerial"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_DNSServer
+    bool "Enable DNSServer"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
+config ARDUINO_SELECTIVE_EEPROM
+    bool "Enable EEPROM"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_ESP32
+    bool "Enable ESP32"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_ESPmDNS
+    bool "Enable ESPmDNS"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
+config ARDUINO_SELECTIVE_FFat
+    bool "Enable FFat"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_FS
+    default y
+
 config ARDUINO_SELECTIVE_FS
     bool "Enable FS"
     depends on ARDUINO_SELECTIVE_COMPILATION
     default y
 
+config ARDUINO_SELECTIVE_HTTPClient
+    bool "Enable HTTPClient"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    select ARDUINO_SELECTIVE_WiFiClientSecure
+    default y
+
+config ARDUINO_SELECTIVE_LITTLEFS
+    bool "Enable LITTLEFS"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_FS
+    default y
+
+config ARDUINO_SELECTIVE_NetBIOS
+    bool "Enable NetBIOS"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
+config ARDUINO_SELECTIVE_Preferences
+    bool "Enable Preferences"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_SD
+    bool "Enable SD"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_FS
+    default y
+
+config ARDUINO_SELECTIVE_SD_MMC
+    bool "Enable SD_MMC"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_FS
+    default y
+
+config ARDUINO_SELECTIVE_SimpleBLE
+    bool "Enable SimpleBLE"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
 config ARDUINO_SELECTIVE_SPI
     bool "Enable SPI"
     depends on ARDUINO_SELECTIVE_COMPILATION
@@ -98,6 +316,39 @@ config ARDUINO_SELECTIVE_SPIFFS
     select ARDUINO_SELECTIVE_FS
     default y
 
+config ARDUINO_SELECTIVE_Ticker
+    bool "Enable Ticker"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_Update
+    bool "Enable Update"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_WebServer
+    bool "Enable WebServer"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+    select ARDUINO_SELECTIVE_FS
+
+config ARDUINO_SELECTIVE_WiFi
+    bool "Enable WiFi"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    default y
+
+config ARDUINO_SELECTIVE_WiFiClientSecure
+    bool "Enable WiFiClientSecure"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
+config ARDUINO_SELECTIVE_WiFiProv
+    bool "Enable WiFiProv"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
 config ARDUINO_SELECTIVE_Wire
     bool "Enable Wire"
     depends on ARDUINO_SELECTIVE_COMPILATION

README.md

@@ -1,49 +1,43 @@
-# Arduino core for the ESP32
-[![Build Status](https://travis-ci.org/espressif/arduino-esp32.svg?branch=master)](https://travis-ci.org/espressif/arduino-esp32) ![](https://github.com/espressif/arduino-esp32/workflows/ESP32%20Arduino%20CI/badge.svg)
+# Arduino core for the ESP32, ESP32-S2 and ESP32-C3
+
+![Build Status](https://github.com/espressif/arduino-esp32/workflows/ESP32%20Arduino%20CI/badge.svg) [![Documentation Status](https://readthedocs.com/projects/espressif-arduino-esp32/badge/?version=latest)](https://docs.espressif.com/projects/arduino-esp32/en/latest/?badge=latest)
 
 ### Need help or have a question? Join the chat at [![https://gitter.im/espressif/arduino-esp32](https://badges.gitter.im/espressif/arduino-esp32.svg)](https://gitter.im/espressif/arduino-esp32?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 ## Contents
+
 - [Development Status](#development-status)
-- [Installation Instructions](#installation-instructions)
 - [Decoding Exceptions](#decoding-exceptions)
 - [Issue/Bug report template](#issuebug-report-template)
-- [ESP32Dev Board PINMAP](#esp32dev-board-pinmap)
 
 ### Development Status
 
 Latest Stable Release  [![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Release Date](https://img.shields.io/github/release-date/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Downloads](https://img.shields.io/github/downloads/espressif/arduino-esp32/latest/total.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/)
 
-Latest Development Release  [![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32/all.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Release Date](https://img.shields.io/github/release-date-pre/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Downloads](https://img.shields.io/github/downloads-pre/espressif/arduino-esp32/latest/total.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/)
+Latest Development Release  [![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32/all.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/) [![Release Date](https://img.shields.io/github/release-date-pre/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/) [![Downloads](https://img.shields.io/github/downloads-pre/espressif/arduino-esp32/latest/total.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/)
 
+### Documentation
 
-### Installation Instructions
-- Using Arduino IDE Boards Manager (preferred)
-  + [Instructions for Boards Manager](docs/arduino-ide/boards_manager.md)
-- Using Arduino IDE with the development repository
-  + [Instructions for Windows](docs/arduino-ide/windows.md)
-  + [Instructions for Mac](docs/arduino-ide/mac.md)
-  + [Instructions for Debian/Ubuntu Linux](docs/arduino-ide/debian_ubuntu.md)
-  + [Instructions for Fedora](docs/arduino-ide/fedora.md)
-  + [Instructions for openSUSE](docs/arduino-ide/opensuse.md)
-- [Using PlatformIO](docs/platformio.md)
-- [Building with make](docs/make.md)
-- [Using as ESP-IDF component](docs/esp-idf_component.md)
-- [Using OTAWebUpdater](docs/OTAWebUpdate/OTAWebUpdate.md)
+You can use [Arduino-ESP32 Online Documentation](https://docs.espressif.com/projects/arduino-esp32/en/latest/) to get all information about this project.
+
+* [Getting Started](https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html)
+* [Installing (Windows, Linux and macOS)](https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html)
+* [Libraries](https://docs.espressif.com/projects/arduino-esp32/en/latest/libraries.html)
+* [ESP-IDF as Component](https://docs.espressif.com/projects/arduino-esp32/en/latest/esp-idf_component.html)
+* [FAQ](https://docs.espressif.com/projects/arduino-esp32/en/latest/faq.html)
+* [Troubleshooting](https://docs.espressif.com/projects/arduino-esp32/en/latest/troubleshooting.html)
 
 ### Decoding exceptions
 
 You can use [EspExceptionDecoder](https://github.com/me-no-dev/EspExceptionDecoder) to get meaningful call trace.
 
 ### Issue/Bug report template
-Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as [for reference](https://github.com/espressif/arduino-esp32/issues?utf8=%E2%9C%93&q=is%3Aissue%20label%3A%22for%20reference%22%20).
+Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as [Type: For reference](https://github.com/espressif/arduino-esp32/issues?q=is%3Aissue+label%3A%22Type%3A+For+reference%22+).
 
-Finally, if you are sure no one else had the issue, follow the [ISSUE_TEMPLATE](docs/ISSUE_TEMPLATE.md) while reporting any issue.
+Finally, if you are sure no one else had the issue, follow the [issue template](docs/ISSUE_TEMPLATE.md) while reporting any issue.
 
-### ESP32Dev Board PINMAP
+### Contributing
 
-![Pin Functions](docs/esp32_pinmap.png)
+We welcome contributions to the Arduino ESP32 project!
 
-### Tip
-
-Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process
+See [contributing](https://docs.espressif.com/projects/arduino-esp32/en/latest/contributing.html) in the documentation for more information on how to contribute to the project.

cores/esp32/Arduino.h

@@ -0,0 +1,200 @@
+/*
+ Arduino.h - Main include file for the Arduino SDK
+ Copyright (c) 2005-2013 Arduino Team.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef Arduino_h
+#define Arduino_h
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "esp_arduino_version.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+#include "esp32-hal.h"
+#include "esp8266-compat.h"
+#include "soc/gpio_reg.h"
+
+#include "stdlib_noniso.h"
+#include "binary.h"
+
+#define PI 3.1415926535897932384626433832795
+#define HALF_PI 1.5707963267948966192313216916398
+#define TWO_PI 6.283185307179586476925286766559
+#define DEG_TO_RAD 0.017453292519943295769236907684886
+#define RAD_TO_DEG 57.295779513082320876798154814105
+#define EULER 2.718281828459045235360287471352
+
+#define SERIAL  0x0
+#define DISPLAY 0x1
+
+#define LSBFIRST 0
+#define MSBFIRST 1
+
+//Interrupt Modes
+#define RISING    0x01
+#define FALLING   0x02
+#define CHANGE    0x03
+#define ONLOW     0x04
+#define ONHIGH    0x05
+#define ONLOW_WE  0x0C
+#define ONHIGH_WE 0x0D
+
+#define DEFAULT 1
+#define EXTERNAL 0
+
+#ifndef __STRINGIFY
+#define __STRINGIFY(a) #a
+#endif
+
+#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#define radians(deg) ((deg)*DEG_TO_RAD)
+#define degrees(rad) ((rad)*RAD_TO_DEG)
+#define sq(x) ((x)*(x))
+
+#define sei()
+#define cli()
+#define interrupts() sei()
+#define noInterrupts() cli()
+
+#define clockCyclesPerMicrosecond() ( (long int)getCpuFrequencyMhz() )
+#define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
+#define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
+
+#define lowByte(w) ((uint8_t) ((w) & 0xff))
+#define highByte(w) ((uint8_t) ((w) >> 8))
+
+#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
+#define bitSet(value, bit) ((value) |= (1UL << (bit)))
+#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
+#define bitWrite(value, bit, bitvalue) ((bitvalue) ? bitSet(value, bit) : bitClear(value, bit))
+
+// avr-libc defines _NOP() since 1.6.2
+#ifndef _NOP
+#define _NOP() do { __asm__ volatile ("nop"); } while (0)
+#endif
+
+#define bit(b) (1UL << (b))
+#define _BV(b) (1UL << (b))
+
+#define digitalPinToTimer(pin)      (0)
+#define analogInPinToBit(P)         (P)
+#if SOC_GPIO_PIN_COUNT <= 32
+#define digitalPinToPort(pin)       (0)
+#define digitalPinToBitMask(pin)    (1UL << (pin))
+#define portOutputRegister(port)    ((volatile uint32_t*)GPIO_OUT_REG)
+#define portInputRegister(port)     ((volatile uint32_t*)GPIO_IN_REG)
+#define portModeRegister(port)      ((volatile uint32_t*)GPIO_ENABLE_REG)
+#elif SOC_GPIO_PIN_COUNT <= 64
+#define digitalPinToPort(pin)       (((pin)>31)?1:0)
+#define digitalPinToBitMask(pin)    (1UL << (((pin)>31)?((pin)-32):(pin)))
+#define portOutputRegister(port)    ((volatile uint32_t*)((port)?GPIO_OUT1_REG:GPIO_OUT_REG))
+#define portInputRegister(port)     ((volatile uint32_t*)((port)?GPIO_IN1_REG:GPIO_IN_REG))
+#define portModeRegister(port)      ((volatile uint32_t*)((port)?GPIO_ENABLE1_REG:GPIO_ENABLE_REG))
+#else
+#error SOC_GPIO_PIN_COUNT > 64 not implemented
+#endif
+
+#define NOT_A_PIN -1
+#define NOT_A_PORT -1
+#define NOT_AN_INTERRUPT -1
+#define NOT_ON_TIMER 0
+
+typedef bool boolean;
+typedef uint8_t byte;
+typedef unsigned int word;
+
+#ifdef __cplusplus
+void setup(void);
+void loop(void);
+
+long random(long, long);
+#endif
+void randomSeed(unsigned long);
+long map(long, long, long, long, long);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void init(void);
+void initVariant(void);
+void initArduino(void);
+
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout);
+unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout);
+
+uint8_t shiftIn(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder);
+void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
+
+#ifdef __cplusplus
+}
+
+#include <algorithm>
+#include <cmath>
+
+#include "WCharacter.h"
+#include "WString.h"
+#include "Stream.h"
+#include "Printable.h"
+#include "Print.h"
+#include "IPAddress.h"
+#include "Client.h"
+#include "Server.h"
+#include "Udp.h"
+#include "HardwareSerial.h"
+#include "Esp.h"
+
+using std::abs;
+using std::isinf;
+using std::isnan;
+using std::max;
+using std::min;
+using ::round;
+
+uint16_t makeWord(uint16_t w);
+uint16_t makeWord(uint8_t h, uint8_t l);
+
+#define word(...) makeWord(__VA_ARGS__)
+
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
+unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
+
+extern "C" bool getLocalTime(struct tm * info, uint32_t ms = 5000);
+extern "C" void configTime(long gmtOffset_sec, int daylightOffset_sec,
+        const char* server1, const char* server2 = nullptr, const char* server3 = nullptr);
+extern "C" void configTzTime(const char* tz,
+        const char* server1, const char* server2 = nullptr, const char* server3 = nullptr);
+
+// WMath prototypes
+long random(long);
+#endif /* __cplusplus */
+
+#define _min(a,b) ((a)<(b)?(a):(b))
+#define _max(a,b) ((a)>(b)?(a):(b))
+
+#include "pins_arduino.h"
+
+#endif /* _ESP32_CORE_ARDUINO_H_ */

cores/esp32/Client.h

@@ -0,0 +1,48 @@
+/*
+ Client.h - Base class that provides Client
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef client_h
+#define client_h
+#include "Print.h"
+#include "Stream.h"
+#include "IPAddress.h"
+
+class Client: public Stream
+{
+public:
+    virtual int connect(IPAddress ip, uint16_t port) =0;
+    virtual int connect(const char *host, uint16_t port) =0;
+    virtual size_t write(uint8_t) =0;
+    virtual size_t write(const uint8_t *buf, size_t size) =0;
+    virtual int available() = 0;
+    virtual int read() = 0;
+    virtual int read(uint8_t *buf, size_t size) = 0;
+    virtual int peek() = 0;
+    virtual void flush() = 0;
+    virtual void stop() = 0;
+    virtual uint8_t connected() = 0;
+    virtual operator bool() = 0;
+protected:
+    uint8_t* rawIPAddress(IPAddress& addr)
+    {
+        return addr.raw_address();
+    }
+};
+
+#endif

cores/esp32/Esp.cpp

@@ -0,0 +1,410 @@
+/*
+ Esp.cpp - ESP31B-specific APIs
+ Copyright (c) 2015 Ivan Grokhotkov. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "Arduino.h"
+#include "Esp.h"
+#include "esp_sleep.h"
+#include "esp_spi_flash.h"
+#include <memory>
+#include <soc/soc.h>
+#include <esp_partition.h>
+extern "C" {
+#include "esp_ota_ops.h"
+#include "esp_image_format.h"
+}
+#include <MD5Builder.h>
+
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/spi_flash.h"
+#include "soc/efuse_reg.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000     // Flash offset containing flash size and spi mode
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#include "soc/efuse_reg.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/spi_flash.h"
+#define ESP_FLASH_IMAGE_BASE 0x0000     // Esp32c3 is located at 0x0000
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/spi_flash.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000
+#endif
+
+/**
+ * User-defined Literals
+ *  usage:
+ *
+ *   uint32_t = test = 10_MHz; // --> 10000000
+ */
+
+unsigned long long operator"" _kHz(unsigned long long x)
+{
+    return x * 1000;
+}
+
+unsigned long long operator"" _MHz(unsigned long long x)
+{
+    return x * 1000 * 1000;
+}
+
+unsigned long long operator"" _GHz(unsigned long long x)
+{
+    return x * 1000 * 1000 * 1000;
+}
+
+unsigned long long operator"" _kBit(unsigned long long x)
+{
+    return x * 1024;
+}
+
+unsigned long long operator"" _MBit(unsigned long long x)
+{
+    return x * 1024 * 1024;
+}
+
+unsigned long long operator"" _GBit(unsigned long long x)
+{
+    return x * 1024 * 1024 * 1024;
+}
+
+unsigned long long operator"" _kB(unsigned long long x)
+{
+    return x * 1024;
+}
+
+unsigned long long operator"" _MB(unsigned long long x)
+{
+    return x * 1024 * 1024;
+}
+
+unsigned long long operator"" _GB(unsigned long long x)
+{
+    return x * 1024 * 1024 * 1024;
+}
+
+
+EspClass ESP;
+
+void EspClass::deepSleep(uint32_t time_us)
+{
+    esp_deep_sleep(time_us);
+}
+
+void EspClass::restart(void)
+{
+    esp_restart();
+}
+
+uint32_t EspClass::getHeapSize(void)
+{
+    multi_heap_info_t info;
+    heap_caps_get_info(&info, MALLOC_CAP_INTERNAL);
+    return info.total_free_bytes + info.total_allocated_bytes;
+}
+
+uint32_t EspClass::getFreeHeap(void)
+{
+    return heap_caps_get_free_size(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getMinFreeHeap(void)
+{
+    return heap_caps_get_minimum_free_size(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getMaxAllocHeap(void)
+{
+    return heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getPsramSize(void)
+{
+	if(psramFound()){
+	    multi_heap_info_t info;
+	    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+	    return info.total_free_bytes + info.total_allocated_bytes;
+	}
+	return 0;
+}
+
+uint32_t EspClass::getFreePsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+uint32_t EspClass::getMinFreePsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_minimum_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+uint32_t EspClass::getMaxAllocPsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+static uint32_t sketchSize(sketchSize_t response) {
+    esp_image_metadata_t data;
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    if (!running) return 0;
+    const esp_partition_pos_t running_pos  = {
+        .offset = running->address,
+        .size = running->size,
+    };
+    data.start_addr = running_pos.offset;
+    esp_image_verify(ESP_IMAGE_VERIFY, &running_pos, &data);
+    if (response) {
+        return running_pos.size - data.image_len;
+    } else {
+        return data.image_len;
+    }
+}
+    
+uint32_t EspClass::getSketchSize () {
+    return sketchSize(SKETCH_SIZE_TOTAL);
+}
+
+String EspClass::getSketchMD5()
+{
+    static String result;
+    if (result.length()) {
+        return result;
+    }
+    uint32_t lengthLeft = getSketchSize();
+
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    if (!running) {
+        log_e("Partition could not be found");
+
+        return String();
+    }
+    const size_t bufSize = SPI_FLASH_SEC_SIZE;
+    std::unique_ptr<uint8_t[]> buf(new uint8_t[bufSize]);
+    uint32_t offset = 0;
+    if(!buf.get()) {
+        log_e("Not enough memory to allocate buffer");
+
+        return String();
+    }
+    MD5Builder md5;
+    md5.begin();
+    while( lengthLeft > 0) {
+        size_t readBytes = (lengthLeft < bufSize) ? lengthLeft : bufSize;
+        if (!ESP.flashRead(running->address + offset, reinterpret_cast<uint32_t*>(buf.get()), (readBytes + 3) & ~3)) {
+            log_e("Could not read buffer from flash");
+
+            return String();
+        }
+        md5.add(buf.get(), readBytes);
+        lengthLeft -= readBytes;
+        offset += readBytes;
+    }
+    md5.calculate();
+    result = md5.toString();
+    return result;
+}
+
+uint32_t EspClass::getFreeSketchSpace () {
+    const esp_partition_t* _partition = esp_ota_get_next_update_partition(NULL);
+    if(!_partition){
+        return 0;
+    }
+
+    return _partition->size;
+}
+
+uint8_t EspClass::getChipRevision(void)
+{
+    esp_chip_info_t chip_info;
+    esp_chip_info(&chip_info);
+    return chip_info.revision;
+}
+
+const char * EspClass::getChipModel(void)
+{
+#if CONFIG_IDF_TARGET_ESP32
+    uint32_t chip_ver = REG_GET_FIELD(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_VER_PKG);
+    uint32_t pkg_ver = chip_ver & 0x7;
+    switch (pkg_ver) {
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D0WDQ6 :
+            return "ESP32-D0WDQ6";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D0WDQ5 :
+            return "ESP32-D0WDQ5";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 :
+            return "ESP32-D2WDQ5";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2 :
+            return "ESP32-PICO-D2";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4 :
+            return "ESP32-PICO-D4";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302 :
+            return "ESP32-PICO-V3-02";
+        default:
+            return "Unknown";
+    }
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t pkg_ver = REG_GET_FIELD(EFUSE_RD_MAC_SPI_SYS_3_REG, EFUSE_PKG_VERSION);
+    switch (pkg_ver) {
+    case 0:
+      return "ESP32-S2";
+    case 1:
+      return "ESP32-S2FH16";
+    case 2:
+      return "ESP32-S2FH32";
+    default:
+      return "ESP32-S2 (Unknown)";
+    }
+#elif CONFIG_IDF_TARGET_ESP32S3
+    return "ESP32-S3";
+#elif CONFIG_IDF_TARGET_ESP32C3
+    return "ESP32-C3";
+#endif
+}
+
+uint8_t EspClass::getChipCores(void)
+{
+    esp_chip_info_t chip_info;
+    esp_chip_info(&chip_info);
+    return chip_info.cores;
+}
+
+const char * EspClass::getSdkVersion(void)
+{
+    return esp_get_idf_version();
+}
+
+uint32_t EspClass::getFlashChipSize(void)
+{
+    esp_image_header_t fhdr;
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+        return 0;
+    }
+    return magicFlashChipSize(fhdr.spi_size);
+}
+
+uint32_t EspClass::getFlashChipSpeed(void)
+{
+    esp_image_header_t fhdr;
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+        return 0;
+    }
+    return magicFlashChipSpeed(fhdr.spi_speed);
+}
+
+FlashMode_t EspClass::getFlashChipMode(void)
+{
+    esp_image_header_t fhdr;
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+        return FM_UNKNOWN;
+    }
+    return magicFlashChipMode(fhdr.spi_mode);
+}
+
+uint32_t EspClass::magicFlashChipSize(uint8_t byte)
+{
+    switch(byte & 0x0F) {
+    case 0x0: // 8 MBit (1MB)
+        return (1_MB);
+    case 0x1: // 16 MBit (2MB)
+        return (2_MB);
+    case 0x2: // 32 MBit (4MB)
+        return (4_MB);
+    case 0x3: // 64 MBit (8MB)
+        return (8_MB);
+    case 0x4: // 128 MBit (16MB)
+        return (16_MB);
+    default: // fail?
+        return 0;
+    }
+}
+
+uint32_t EspClass::magicFlashChipSpeed(uint8_t byte)
+{
+    switch(byte & 0x0F) {
+    case 0x0: // 40 MHz
+        return (40_MHz);
+    case 0x1: // 26 MHz
+        return (26_MHz);
+    case 0x2: // 20 MHz
+        return (20_MHz);
+    case 0xf: // 80 MHz
+        return (80_MHz);
+    default: // fail?
+        return 0;
+    }
+}
+
+FlashMode_t EspClass::magicFlashChipMode(uint8_t byte)
+{
+    FlashMode_t mode = (FlashMode_t) byte;
+    if(mode > FM_SLOW_READ) {
+        mode = FM_UNKNOWN;
+    }
+    return mode;
+}
+
+bool EspClass::flashEraseSector(uint32_t sector)
+{
+    return spi_flash_erase_sector(sector) == ESP_OK;
+}
+
+// Warning: These functions do not work with encrypted flash
+bool EspClass::flashWrite(uint32_t offset, uint32_t *data, size_t size)
+{
+    return spi_flash_write(offset, (uint32_t*) data, size) == ESP_OK;
+}
+
+bool EspClass::flashRead(uint32_t offset, uint32_t *data, size_t size)
+{
+    return spi_flash_read(offset, (uint32_t*) data, size) == ESP_OK;
+}
+
+bool EspClass::partitionEraseRange(const esp_partition_t *partition, uint32_t offset, size_t size) 
+{
+    return esp_partition_erase_range(partition, offset, size) == ESP_OK;
+}
+
+bool EspClass::partitionWrite(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size) 
+{
+    return esp_partition_write(partition, offset, data, size) == ESP_OK;
+}
+
+bool EspClass::partitionRead(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size) 
+{
+    return esp_partition_read(partition, offset, data, size) == ESP_OK;
+}
+
+uint64_t EspClass::getEfuseMac(void)
+{
+    uint64_t _chipmacid = 0LL;
+    esp_efuse_mac_get_default((uint8_t*) (&_chipmacid));
+    return _chipmacid;
+}

cores/esp32/Esp.h

@@ -0,0 +1,119 @@
+/*
+ Esp.h - ESP31B-specific APIs
+ Copyright (c) 2015 Ivan Grokhotkov. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef ESP_H
+#define ESP_H
+
+#include <Arduino.h>
+#include <esp_partition.h>
+#include <hal/cpu_hal.h>
+
+/**
+ * AVR macros for WDT managment
+ */
+typedef enum {
+    WDTO_0MS    = 0,   //!< WDTO_0MS
+    WDTO_15MS   = 15,  //!< WDTO_15MS
+    WDTO_30MS   = 30,  //!< WDTO_30MS
+    WDTO_60MS   = 60,  //!< WDTO_60MS
+    WDTO_120MS  = 120, //!< WDTO_120MS
+    WDTO_250MS  = 250, //!< WDTO_250MS
+    WDTO_500MS  = 500, //!< WDTO_500MS
+    WDTO_1S     = 1000,//!< WDTO_1S
+    WDTO_2S     = 2000,//!< WDTO_2S
+    WDTO_4S     = 4000,//!< WDTO_4S
+    WDTO_8S     = 8000 //!< WDTO_8S
+} WDTO_t;
+
+
+typedef enum {
+    FM_QIO = 0x00,
+    FM_QOUT = 0x01,
+    FM_DIO = 0x02,
+    FM_DOUT = 0x03,
+    FM_FAST_READ = 0x04,
+    FM_SLOW_READ = 0x05,
+    FM_UNKNOWN = 0xff
+} FlashMode_t;
+
+typedef enum {
+    SKETCH_SIZE_TOTAL = 0,
+    SKETCH_SIZE_FREE = 1
+} sketchSize_t;
+
+class EspClass
+{
+public:
+    EspClass() {}
+    ~EspClass() {}
+    void restart();
+
+    //Internal RAM
+    uint32_t getHeapSize(); //total heap size
+    uint32_t getFreeHeap(); //available heap
+    uint32_t getMinFreeHeap(); //lowest level of free heap since boot
+    uint32_t getMaxAllocHeap(); //largest block of heap that can be allocated at once
+
+    //SPI RAM
+    uint32_t getPsramSize();
+    uint32_t getFreePsram();
+    uint32_t getMinFreePsram();
+    uint32_t getMaxAllocPsram();
+
+    uint8_t getChipRevision();
+    const char * getChipModel();
+    uint8_t getChipCores();
+    uint32_t getCpuFreqMHz(){ return getCpuFrequencyMhz(); }
+    inline uint32_t getCycleCount() __attribute__((always_inline));
+    const char * getSdkVersion();
+
+    void deepSleep(uint32_t time_us);
+
+    uint32_t getFlashChipSize();
+    uint32_t getFlashChipSpeed();
+    FlashMode_t getFlashChipMode();
+
+    uint32_t magicFlashChipSize(uint8_t byte);
+    uint32_t magicFlashChipSpeed(uint8_t byte);
+    FlashMode_t magicFlashChipMode(uint8_t byte);
+
+    uint32_t getSketchSize();
+    String getSketchMD5();
+    uint32_t getFreeSketchSpace();
+
+    bool flashEraseSector(uint32_t sector);
+    bool flashWrite(uint32_t offset, uint32_t *data, size_t size);
+    bool flashRead(uint32_t offset, uint32_t *data, size_t size);
+
+    bool partitionEraseRange(const esp_partition_t *partition, uint32_t offset, size_t size);
+    bool partitionWrite(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size);
+    bool partitionRead(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size);
+
+    uint64_t getEfuseMac();
+
+};
+
+uint32_t ARDUINO_ISR_ATTR EspClass::getCycleCount()
+{
+    return cpu_hal_get_cycle_count();
+}
+
+extern EspClass ESP;
+
+#endif //ESP_H

cores/esp32/FirmwareMSC.cpp

@@ -0,0 +1,424 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "FirmwareMSC.h"
+
+#if CONFIG_TINYUSB_MSC_ENABLED
+
+#include <cstring>
+#include "esp_partition.h"
+#include "esp_ota_ops.h"
+#include "esp32-hal.h"
+#include "pins_arduino.h"
+#include "firmware_msc_fat.h"
+
+#ifndef USB_FW_MSC_VENDOR_ID
+#define USB_FW_MSC_VENDOR_ID "ESP32" //max 8 chars
+#endif
+#ifndef USB_FW_MSC_PRODUCT_ID
+#define USB_FW_MSC_PRODUCT_ID "Firmware MSC"//max 16 chars
+#endif
+#ifndef USB_FW_MSC_PRODUCT_REVISION
+#define USB_FW_MSC_PRODUCT_REVISION "1.0" //max 4 chars
+#endif
+#ifndef USB_FW_MSC_VOLUME_NAME
+#define USB_FW_MSC_VOLUME_NAME "ESP32-FWMSC" //max 11 chars
+#endif
+#ifndef USB_FW_MSC_SERIAL_NUMBER
+#define USB_FW_MSC_SERIAL_NUMBER 0x00000000
+#endif
+
+ESP_EVENT_DEFINE_BASE(ARDUINO_FIRMWARE_MSC_EVENTS);
+esp_err_t arduino_usb_event_post(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait);
+esp_err_t arduino_usb_event_handler_register_with(esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg);
+
+//General Variables
+static uint8_t * msc_ram_disk = NULL;
+static fat_boot_sector_t * msc_boot = NULL;
+static uint8_t * msc_table = NULL;
+static uint16_t msc_table_sectors = 0;
+static uint16_t msc_total_sectors = 0;
+static bool mcs_is_fat16 = false;
+
+//Firmware Read
+static const esp_partition_t* msc_run_partition = NULL;
+static uint16_t fw_start_sector = 0;
+static uint16_t fw_end_sector = 0;
+static size_t fw_size = 0;
+static fat_dir_entry_t * fw_entry = NULL;
+
+//Firmware Write
+typedef enum {
+  MSC_UPDATE_IDLE,
+  MSC_UPDATE_STARTING,
+  MSC_UPDATE_RUNNING,
+  MSC_UPDATE_END
+} msc_update_state_t;
+
+static const esp_partition_t* msc_ota_partition = NULL;
+static msc_update_state_t msc_update_state = MSC_UPDATE_IDLE;
+static uint16_t msc_update_start_sector = 0;
+static uint32_t msc_update_bytes_written = 0;
+static fat_dir_entry_t * msc_update_entry = NULL;
+
+static uint32_t get_firmware_size(const esp_partition_t* partition){
+  esp_image_metadata_t data;
+  const esp_partition_pos_t running_pos  = {
+      .offset = partition->address,
+      .size = partition->size,
+  };
+  data.start_addr = running_pos.offset;
+  esp_image_verify(ESP_IMAGE_VERIFY, &running_pos, &data);
+  return data.image_len;
+}
+
+//Get number of sectors required based on the size of the firmware and OTA partition
+static size_t msc_update_get_required_disk_sectors(){
+  size_t data_sectors = 16;
+  size_t total_sectors = 0;
+  msc_run_partition = esp_ota_get_running_partition();
+  msc_ota_partition = esp_ota_get_next_update_partition(NULL);
+  if(msc_run_partition){
+    fw_size = get_firmware_size(msc_run_partition);
+    data_sectors += FAT_SIZE_TO_SECTORS(fw_size);
+    log_d("APP size: %u (%u sectors)", fw_size, FAT_SIZE_TO_SECTORS(fw_size));
+  } else {
+    log_w("APP partition not found. Reading disabled");
+  }
+  if(msc_ota_partition){
+    data_sectors += FAT_SIZE_TO_SECTORS(msc_ota_partition->size);
+    log_d("OTA size: %u (%u sectors)", msc_ota_partition->size, FAT_SIZE_TO_SECTORS(msc_ota_partition->size));
+  } else {
+    log_w("OTA partition not found. Writing disabled");
+  }
+  msc_table_sectors = fat_sectors_per_alloc_table(data_sectors, false);
+  total_sectors = data_sectors + msc_table_sectors + 2;
+  if(total_sectors > 0xFF4){
+    log_d("USING FAT16");
+    mcs_is_fat16 = true;
+    total_sectors -= msc_table_sectors;
+    msc_table_sectors = fat_sectors_per_alloc_table(data_sectors, true);
+    total_sectors += msc_table_sectors;
+  } else {
+    log_d("USING FAT12");
+    mcs_is_fat16 = false;
+  }
+  log_d("FAT sector size: %u", DISK_SECTOR_SIZE);
+  log_d("FAT data sectors: %u", data_sectors);
+  log_d("FAT table sectors: %u", msc_table_sectors);
+  log_d("FAT total sectors: %u (%uKB)", total_sectors, (total_sectors * DISK_SECTOR_SIZE) / 1024);
+  return total_sectors;
+}
+
+//setup the ramdisk and add the firmware download file
+static bool msc_update_setup_disk(const char * volume_label, uint32_t serial_number){
+  msc_total_sectors = msc_update_get_required_disk_sectors();
+  uint8_t ram_sectors = msc_table_sectors + 2;
+  msc_ram_disk = (uint8_t*)calloc(ram_sectors, DISK_SECTOR_SIZE);
+  if(!msc_ram_disk){
+    log_e("Failed to allocate RAM Disk: %u bytes", ram_sectors * DISK_SECTOR_SIZE);
+    return false;
+  }
+  fw_start_sector = ram_sectors;
+  fw_end_sector = fw_start_sector;
+  msc_boot = fat_add_boot_sector(msc_ram_disk, msc_total_sectors, msc_table_sectors, fat_file_system_type(mcs_is_fat16), volume_label, serial_number);
+  msc_table = fat_add_table(msc_ram_disk, msc_boot, mcs_is_fat16);
+  //fat_dir_entry_t * label = fat_add_label(msc_ram_disk, volume_label);
+  if(msc_run_partition){
+    fw_entry = fat_add_root_file(msc_ram_disk, 0, "FIRMWARE", "BIN", fw_size, 2, mcs_is_fat16);
+    fw_end_sector = FAT_SIZE_TO_SECTORS(fw_size) + fw_start_sector;
+  }
+  return true;
+}
+
+static void msc_update_delete_disk(){
+  fw_entry = NULL;
+  fw_size = 0;
+  fw_end_sector = 0;
+  fw_start_sector = 0;
+  msc_table = NULL;
+  msc_boot = NULL;
+  msc_table_sectors = 0;
+  msc_total_sectors = 0;
+  msc_run_partition = NULL;
+  msc_ota_partition = NULL;
+  msc_update_state = MSC_UPDATE_IDLE;
+  msc_update_start_sector = 0;
+  msc_update_bytes_written = 0;
+  msc_update_entry = NULL;
+  free(msc_ram_disk);
+  msc_ram_disk = NULL;
+}
+
+//filter out entries to only include BINs in the root folder
+static fat_dir_entry_t * msc_update_get_root_bin_entry(uint8_t index){
+  fat_dir_entry_t * entry = (fat_dir_entry_t *)(msc_ram_disk + ((msc_boot->sectors_per_alloc_table+1) * DISK_SECTOR_SIZE) + (index * sizeof(fat_dir_entry_t)));
+  fat_lfn_entry_t * lfn = (fat_lfn_entry_t*)entry;
+
+  //empty entry
+  if(entry->file_magic == 0){
+    return NULL;
+  }
+  //long file name
+  if(lfn->attr == 0x0F && lfn->type == 0x00 && lfn->first_cluster == 0x0000){
+    return NULL;
+  }
+  //only files marked as archives
+  if(entry->file_attr != FAT_FILE_ATTR_ARCHIVE){
+    return NULL;
+  }
+  //deleted
+  if(entry->file_magic == 0xE5 || entry->file_magic == 0x05){
+    return NULL;
+  }
+  //not bins
+  if(memcmp("BIN", entry->file_extension, 3)){
+    return NULL;
+  }
+  return entry;
+}
+
+//get an empty bin (the host will add an entry for file about to be written with size of zero)
+static fat_dir_entry_t * msc_update_find_new_bin(){
+  for(uint8_t i=16; i;){
+    i--;
+    fat_dir_entry_t * entry = msc_update_get_root_bin_entry(i);
+    if(entry && entry->file_size == 0){
+      return entry;
+    }
+  }
+  return NULL;
+}
+
+//get a bin starting from particular sector
+static fat_dir_entry_t * msc_update_find_bin(uint16_t sector){
+  for(uint8_t i=16; i; ){
+    i--;
+    fat_dir_entry_t * entry = msc_update_get_root_bin_entry(i);
+    if(entry && entry->data_start_sector == (sector - msc_boot->sectors_per_alloc_table)){
+      return entry;
+    }
+  }
+  return NULL;
+}
+
+//write the new data and erase the flash blocks when necessary
+static esp_err_t msc_update_write(const esp_partition_t *partition, uint32_t offset, void *data, size_t size){
+  esp_err_t err = ESP_OK;
+  if((offset & (SPI_FLASH_SEC_SIZE-1)) == 0){
+    err = esp_partition_erase_range(partition, offset, SPI_FLASH_SEC_SIZE);
+    log_v("ERASE[0x%08X]: %s", offset, (err != ESP_OK)?"FAIL":"OK");
+    if(err != ESP_OK){
+      return err;
+    }
+  }
+  return esp_partition_write(partition, offset, data, size);
+}
+
+//called when error was encountered while updating
+static void msc_update_error(){
+  log_e("UPDATE_ERROR: %u", msc_update_bytes_written);
+  arduino_firmware_msc_event_data_t p;
+  p.error.size = msc_update_bytes_written;
+  arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_ERROR_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+  msc_update_state = MSC_UPDATE_IDLE;
+  msc_update_entry = NULL;
+  msc_update_bytes_written = 0;
+  msc_update_start_sector = 0;
+}
+
+//called when all firmware bytes have been received
+static void msc_update_end(){
+  log_d("UPDATE_END: %u", msc_update_entry->file_size);
+  msc_update_state = MSC_UPDATE_END;
+  size_t ota_size = get_firmware_size(msc_ota_partition);
+  if(ota_size != msc_update_entry->file_size){
+    log_e("OTA SIZE MISMATCH %u != %u", ota_size, msc_update_entry->file_size);
+    msc_update_error();
+    return;
+  }
+  if(!ota_size || esp_ota_set_boot_partition(msc_ota_partition) != ESP_OK){
+    log_e("ENABLING OTA PARTITION FAILED");
+    msc_update_error();
+    return;
+  }
+  arduino_firmware_msc_event_data_t p;
+  p.end.size = msc_update_entry->file_size;
+  arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_END_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+}
+
+static int32_t msc_write(uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize){
+  //log_d("lba: %u, offset: %u, bufsize: %u", lba, offset, bufsize);
+  if(lba < fw_start_sector){
+    //write to sectors that are in RAM
+    memcpy(msc_ram_disk + (lba * DISK_SECTOR_SIZE) + offset, buffer, bufsize);
+    if(msc_ota_partition && lba == (fw_start_sector - 1)){
+      //monitor the root folder table
+      if(msc_update_state <= MSC_UPDATE_RUNNING){
+        fat_dir_entry_t * update_entry = msc_update_find_new_bin();
+        if(update_entry) {
+          if(msc_update_entry) {
+            log_v("REPLACING ENTRY");
+          } else {
+            log_v("ASSIGNING ENTRY");
+          }
+          if(msc_update_state <= MSC_UPDATE_STARTING){
+            msc_update_state = MSC_UPDATE_STARTING;
+            msc_update_bytes_written = 0;
+            msc_update_start_sector = 0;
+          }
+          msc_update_entry = update_entry;
+        } else if(msc_update_state == MSC_UPDATE_RUNNING){
+          if(!msc_update_entry && msc_update_start_sector){
+            msc_update_entry = msc_update_find_bin(msc_update_start_sector);
+          }
+          if(msc_update_entry && msc_update_bytes_written >= msc_update_entry->file_size){
+            msc_update_end();
+          }
+        }
+      }
+    }
+  } else if(msc_ota_partition && lba >= msc_update_start_sector){
+    //handle writes to the region where the new firmware will be uploaded
+    arduino_firmware_msc_event_data_t p;
+    if(msc_update_state <= MSC_UPDATE_STARTING && buffer[0] == 0xE9){
+      msc_update_state = MSC_UPDATE_RUNNING;
+      msc_update_start_sector = lba;
+      msc_update_bytes_written = 0;
+      log_d("UPDATE_START: %u (0x%02X)", lba, lba - msc_boot->sectors_per_alloc_table);
+      arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_START_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+      if(msc_update_write(msc_ota_partition, ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset, buffer, bufsize) == ESP_OK){
+        log_v("UPDATE_WRITE: %u %u", ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset, bufsize);
+        msc_update_bytes_written = ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset + bufsize;
+        p.write.offset = ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset;
+        p.write.size = bufsize;
+        arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_WRITE_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+      } else {
+        msc_update_error();
+        return 0;
+      }
+    } else if(msc_update_state == MSC_UPDATE_RUNNING){
+      if(msc_update_entry && msc_update_entry->file_size && msc_update_bytes_written < msc_update_entry->file_size && (msc_update_bytes_written + bufsize) >= msc_update_entry->file_size){
+        bufsize = msc_update_entry->file_size - msc_update_bytes_written;
+      }
+      if(msc_update_write(msc_ota_partition, ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset, buffer, bufsize) == ESP_OK){
+        log_v("UPDATE_WRITE: %u %u", ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset, bufsize);
+        msc_update_bytes_written = ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset + bufsize;
+        p.write.offset = ((lba - msc_update_start_sector) * DISK_SECTOR_SIZE) + offset;
+        p.write.size = bufsize;
+        arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_WRITE_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+        if(msc_update_entry && msc_update_entry->file_size && msc_update_bytes_written >= msc_update_entry->file_size){
+          msc_update_end();
+        }
+      } else {
+        msc_update_error();
+        return 0;
+      }
+    }
+  }
+  return bufsize;
+}
+
+static int32_t msc_read(uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize){
+  //log_d("lba: %u, offset: %u, bufsize: %u", lba, offset, bufsize);
+  if(lba < fw_start_sector){
+    memcpy(buffer, msc_ram_disk + (lba * DISK_SECTOR_SIZE) + offset, bufsize);
+  } else if(msc_run_partition && lba < fw_end_sector){
+    //read the currently running firmware
+    if(esp_partition_read(msc_run_partition, ((lba - fw_start_sector) * DISK_SECTOR_SIZE) + offset, buffer, bufsize) != ESP_OK){
+      return 0;
+    }
+  } else {
+    memset(buffer, 0, bufsize);
+  }
+  return bufsize;
+}
+
+static bool msc_start_stop(uint8_t power_condition, bool start, bool load_eject){
+  //log_d("power: %u, start: %u, eject: %u", power_condition, start, load_eject);
+  arduino_firmware_msc_event_data_t p;
+  p.power.power_condition = power_condition;
+  p.power.start = start;
+  p.power.load_eject = load_eject;
+  arduino_usb_event_post(ARDUINO_FIRMWARE_MSC_EVENTS, ARDUINO_FIRMWARE_MSC_POWER_EVENT, &p, sizeof(arduino_firmware_msc_event_data_t), portMAX_DELAY);
+  return true;
+}
+
+static volatile TaskHandle_t msc_task_handle = NULL;
+static void msc_task(void *pvParameters){
+  for (;;) {
+    if(msc_update_state == MSC_UPDATE_END){
+      delay(100);
+      esp_restart();
+    }
+    delay(100);
+  }
+  msc_task_handle = NULL;
+  vTaskDelete(NULL);
+}
+
+FirmwareMSC::FirmwareMSC():msc(){}
+
+FirmwareMSC::~FirmwareMSC(){
+  end();
+}
+
+bool FirmwareMSC::begin(){
+  if(msc_ram_disk){
+    return true;
+  }
+
+  if(!msc_update_setup_disk(USB_FW_MSC_VOLUME_NAME, USB_FW_MSC_SERIAL_NUMBER)){
+    return false;
+  }
+
+  if(!msc_task_handle){
+    xTaskCreateUniversal(msc_task, "msc_disk", 1024, NULL, 2, (TaskHandle_t*)&msc_task_handle, 0);
+    if(!msc_task_handle){
+      msc_update_delete_disk();
+      return false;
+    }
+  }
+
+  msc.vendorID(USB_FW_MSC_VENDOR_ID);
+  msc.productID(USB_FW_MSC_PRODUCT_ID);
+  msc.productRevision(USB_FW_MSC_PRODUCT_REVISION);
+  msc.onStartStop(msc_start_stop);
+  msc.onRead(msc_read);
+  msc.onWrite(msc_write);
+  msc.mediaPresent(true);
+  msc.begin(msc_boot->fat12_sector_num, DISK_SECTOR_SIZE);
+  return true;
+}
+
+void FirmwareMSC::end(){
+  msc.end();
+  if(msc_task_handle){
+    vTaskDelete(msc_task_handle);
+    msc_task_handle = NULL;
+  }
+  msc_update_delete_disk();
+}
+
+void FirmwareMSC::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_FIRMWARE_MSC_ANY_EVENT, callback);
+}
+void FirmwareMSC::onEvent(arduino_firmware_msc_event_t event, esp_event_handler_t callback){
+    arduino_usb_event_handler_register_with(ARDUINO_FIRMWARE_MSC_EVENTS, event, callback, this);
+}
+
+#if ARDUINO_USB_MSC_ON_BOOT
+FirmwareMSC MSC_Update;
+#endif
+
+#endif /* CONFIG_USB_MSC_ENABLED */

cores/esp32/FirmwareMSC.h

@@ -0,0 +1,70 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <stdbool.h>
+#include "USBMSC.h"
+
+#if CONFIG_TINYUSB_MSC_ENABLED
+
+#include "esp_event.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_FIRMWARE_MSC_EVENTS);
+
+typedef enum {
+    ARDUINO_FIRMWARE_MSC_ANY_EVENT = ESP_EVENT_ANY_ID,
+    ARDUINO_FIRMWARE_MSC_START_EVENT = 0,
+    ARDUINO_FIRMWARE_MSC_WRITE_EVENT,
+    ARDUINO_FIRMWARE_MSC_END_EVENT,
+    ARDUINO_FIRMWARE_MSC_ERROR_EVENT,
+    ARDUINO_FIRMWARE_MSC_POWER_EVENT,
+    ARDUINO_FIRMWARE_MSC_MAX_EVENT,
+} arduino_firmware_msc_event_t;
+
+typedef union {
+    struct {
+            size_t offset;
+            size_t size;
+    } write;
+    struct {
+            uint8_t power_condition;
+            bool start;
+            bool load_eject;
+    } power;
+    struct {
+            size_t size;
+    } end;
+    struct {
+            size_t size;
+    } error;
+} arduino_firmware_msc_event_data_t;
+
+class FirmwareMSC {
+private:
+  USBMSC msc;
+
+public:
+  FirmwareMSC();
+  ~FirmwareMSC();
+  bool begin();
+  void end();
+  void onEvent(esp_event_handler_t callback);
+  void onEvent(arduino_firmware_msc_event_t event, esp_event_handler_t callback);
+};
+
+#if ARDUINO_USB_MSC_ON_BOOT
+extern FirmwareMSC MSC_Update;
+#endif
+
+#endif /* CONFIG_TINYUSB_MSC_ENABLED */

cores/esp32/FunctionalInterrupt.cpp

@@ -6,7 +6,7 @@
  */
 
 #include "FunctionalInterrupt.h"
-#include "esp32-hal.h"
+#include "Arduino.h"
 
 typedef void (*voidFuncPtr)(void);
 typedef void (*voidFuncPtrArg)(void*);

cores/esp32/HWCDC.cpp

@@ -0,0 +1,388 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "USB.h"
+#if CONFIG_IDF_TARGET_ESP32C3
+
+#include "esp32-hal.h"
+#include "HWCDC.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "freertos/queue.h"
+#include "freertos/ringbuf.h"
+#include "esp_intr_alloc.h"
+#include "soc/periph_defs.h"
+#include "hal/usb_serial_jtag_ll.h"
+
+ESP_EVENT_DEFINE_BASE(ARDUINO_HW_CDC_EVENTS);
+
+static RingbufHandle_t tx_ring_buf = NULL;
+static xQueueHandle rx_queue = NULL;
+static uint8_t rx_data_buf[64];
+static intr_handle_t intr_handle = NULL;
+static volatile bool initial_empty = false;
+static xSemaphoreHandle tx_lock = NULL;
+static uint32_t tx_timeout_ms = 200;
+static esp_event_loop_handle_t arduino_hw_cdc_event_loop_handle = NULL;
+
+static esp_err_t arduino_hw_cdc_event_post(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, BaseType_t *task_unblocked){
+    if(arduino_hw_cdc_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_isr_post_to(arduino_hw_cdc_event_loop_handle, event_base, event_id, event_data, event_data_size, task_unblocked);
+}
+
+static esp_err_t arduino_hw_cdc_event_handler_register_with(esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg){
+    if (!arduino_hw_cdc_event_loop_handle) {
+        esp_event_loop_args_t event_task_args = {
+            .queue_size = 5,
+            .task_name = "arduino_hw_cdc_events",
+            .task_priority = 5,
+            .task_stack_size = 2048,
+            .task_core_id = tskNO_AFFINITY
+        };
+        if (esp_event_loop_create(&event_task_args, &arduino_hw_cdc_event_loop_handle) != ESP_OK) {
+            log_e("esp_event_loop_create failed");
+        }
+    }
+    if(arduino_hw_cdc_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_handler_register_with(arduino_hw_cdc_event_loop_handle, event_base, event_id, event_handler, event_handler_arg);
+}
+
+static void hw_cdc_isr_handler(void *arg) {
+    portBASE_TYPE xTaskWoken = 0;
+    uint32_t usbjtag_intr_status = 0;
+    arduino_hw_cdc_event_data_t event = {0};
+    usbjtag_intr_status = usb_serial_jtag_ll_get_intsts_mask();
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY) {
+        // Interrupt tells us the host picked up the data we sent.
+        if (usb_serial_jtag_ll_txfifo_writable() == 1) {
+            // We disable the interrupt here so that the interrupt won't be triggered if there is no data to send.
+            usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+
+            if(!initial_empty){
+                initial_empty = true;
+                //send event?
+                //ets_printf("CONNECTED\n");
+                arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_CONNECTED_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+            }
+            size_t queued_size;
+            uint8_t *queued_buff = (uint8_t *)xRingbufferReceiveUpToFromISR(tx_ring_buf, &queued_size, 64);
+            // If the hardware fifo is avaliable, write in it. Otherwise, do nothing.
+            if (queued_buff != NULL) {  //Although tx_queued_bytes may be larger than 0. We may have interrupt before xRingbufferSend() was called.
+                //Copy the queued buffer into the TX FIFO
+                usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+                usb_serial_jtag_ll_write_txfifo(queued_buff, queued_size);
+                usb_serial_jtag_ll_txfifo_flush();
+                vRingbufferReturnItemFromISR(tx_ring_buf, queued_buff, &xTaskWoken);
+                usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+                //send event?
+                //ets_printf("TX:%u\n", queued_size);
+                event.tx.len = queued_size;
+                arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_TX_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+            }
+        } else {
+            usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        }
+    }
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT) {
+        // read rx buffer(max length is 64), and send avaliable data to ringbuffer.
+        // Ensure the rx buffer size is larger than RX_MAX_SIZE.
+        usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT);
+        uint32_t rx_fifo_len = usb_serial_jtag_ll_read_rxfifo(rx_data_buf, 64);
+        uint32_t i=0;
+        for(i=0; i<rx_fifo_len; i++){
+            if(rx_queue == NULL || !xQueueSendFromISR(rx_queue, rx_data_buf+i, &xTaskWoken)){
+                break;
+            }
+        }
+        //send event?
+        //ets_printf("RX:%u/%u\n", i, rx_fifo_len);
+        event.rx.len = i;
+        arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_RX_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+    }
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_BUS_RESET) {
+        usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_BUS_RESET);
+        initial_empty = false;
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        //ets_printf("BUS_RESET\n");
+        arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_BUS_RESET_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+    }
+
+    if (xTaskWoken == pdTRUE) {
+        portYIELD_FROM_ISR();
+    }
+}
+
+static void ARDUINO_ISR_ATTR cdc0_write_char(char c) {
+    if(xPortInIsrContext()){
+        xRingbufferSendFromISR(tx_ring_buf, (void*) (&c), 1, NULL);
+    } else {
+        xRingbufferSend(tx_ring_buf, (void*) (&c), 1, tx_timeout_ms / portTICK_PERIOD_MS);
+    }
+    usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+}
+
+HWCDC::HWCDC() {
+
+}
+
+HWCDC::~HWCDC(){
+    end();
+}
+
+HWCDC::operator bool() const
+{
+    return initial_empty;
+}
+
+void HWCDC::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_HW_CDC_ANY_EVENT, callback);
+}
+
+void HWCDC::onEvent(arduino_hw_cdc_event_t event, esp_event_handler_t callback){
+    arduino_hw_cdc_event_handler_register_with(ARDUINO_HW_CDC_EVENTS, event, callback, this);
+}
+
+void HWCDC::begin(unsigned long baud)
+{
+    if(tx_lock == NULL) {
+        tx_lock = xSemaphoreCreateMutex();
+    }
+    setRxBufferSize(256);//default if not preset
+    setTxBufferSize(256);//default if not preset
+
+    usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
+    usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
+    if(!intr_handle && esp_intr_alloc(ETS_USB_SERIAL_JTAG_INTR_SOURCE, 0, hw_cdc_isr_handler, NULL, &intr_handle) != ESP_OK){
+        isr_log_e("HW USB CDC failed to init interrupts");
+        end();
+        return;
+    }
+}
+
+void HWCDC::end()
+{
+    //Disable tx/rx interrupt.
+    usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
+    esp_intr_free(intr_handle);
+    intr_handle = NULL;
+    if(tx_lock != NULL) {
+        vSemaphoreDelete(tx_lock);
+    }
+    setRxBufferSize(0);
+    setTxBufferSize(0);
+    if (arduino_hw_cdc_event_loop_handle) {
+        esp_event_loop_delete(arduino_hw_cdc_event_loop_handle);
+        arduino_hw_cdc_event_loop_handle = NULL;
+    }
+}
+
+void HWCDC::setTxTimeoutMs(uint32_t timeout){
+    tx_timeout_ms = timeout;
+}
+
+/*
+ * WRITING
+*/
+
+size_t HWCDC::setTxBufferSize(size_t tx_queue_len){
+    if(tx_ring_buf){
+        if(!tx_queue_len){
+            vRingbufferDelete(tx_ring_buf);
+            tx_ring_buf = NULL;
+        }
+        return 0;
+    }
+    tx_ring_buf = xRingbufferCreate(tx_queue_len, RINGBUF_TYPE_BYTEBUF);
+    if(!tx_ring_buf){
+        return 0;
+    }
+    return tx_queue_len;
+}
+
+int HWCDC::availableForWrite(void)
+{
+    if(tx_ring_buf == NULL || tx_lock == NULL){
+        return 0;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t a = xRingbufferGetCurFreeSize(tx_ring_buf);
+    xSemaphoreGive(tx_lock);
+    return a;
+}
+
+size_t HWCDC::write(const uint8_t *buffer, size_t size)
+{
+    if(buffer == NULL || size == 0 || tx_ring_buf == NULL || tx_lock == NULL){
+        return 0;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t max_size = xRingbufferGetMaxItemSize(tx_ring_buf);
+    size_t space = xRingbufferGetCurFreeSize(tx_ring_buf);
+    size_t to_send = size, so_far = 0;
+
+    if(space > size){
+        space = size;
+    }
+    // Non-Blocking method, Sending data to ringbuffer, and handle the data in ISR.
+    if(xRingbufferSend(tx_ring_buf, (void*) (buffer), space, 0) != pdTRUE){
+        size = 0;
+    } else {
+        to_send -= space;
+        so_far += space;
+        // Now trigger the ISR to read data from the ring buffer.
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+
+        while(to_send){
+            if(max_size > to_send){
+                max_size = to_send;
+            }
+            // Blocking method, Sending data to ringbuffer, and handle the data in ISR.
+            if(xRingbufferSend(tx_ring_buf, (void*) (buffer+so_far), max_size, tx_timeout_ms / portTICK_PERIOD_MS) != pdTRUE){
+                size = so_far;
+                break;
+            }
+            so_far += max_size;
+            to_send -= max_size;
+            // Now trigger the ISR to read data from the ring buffer.
+            usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        }
+    }
+    xSemaphoreGive(tx_lock);
+    return size;
+}
+
+size_t HWCDC::write(uint8_t c)
+{
+    return write(&c, 1);
+}
+
+void HWCDC::flush(void)
+{
+    if(tx_ring_buf == NULL || tx_lock == NULL){
+        return;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return;
+    }
+    UBaseType_t uxItemsWaiting = 0;
+    vRingbufferGetInfo(tx_ring_buf, NULL, NULL, NULL, NULL, &uxItemsWaiting);
+    if(uxItemsWaiting){
+        // Now trigger the ISR to read data from the ring buffer.
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+    }
+    while(uxItemsWaiting){
+        delay(5);
+        vRingbufferGetInfo(tx_ring_buf, NULL, NULL, NULL, NULL, &uxItemsWaiting);
+    }
+    xSemaphoreGive(tx_lock);
+}
+
+/*
+ * READING
+*/
+
+size_t HWCDC::setRxBufferSize(size_t rx_queue_len){
+    if(rx_queue){
+        if(!rx_queue_len){
+            vQueueDelete(rx_queue);
+            rx_queue = NULL;
+        }
+        return 0;
+    }
+    rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));
+    if(!rx_queue){
+        return 0;
+    }
+    if(!tx_ring_buf){
+        tx_ring_buf = xRingbufferCreate(rx_queue_len, RINGBUF_TYPE_BYTEBUF);
+    }
+    return rx_queue_len;
+}
+
+int HWCDC::available(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    return uxQueueMessagesWaiting(rx_queue);
+}
+
+int HWCDC::peek(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c;
+    if(xQueuePeek(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+int HWCDC::read(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c = 0;
+    if(xQueueReceive(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+size_t HWCDC::read(uint8_t *buffer, size_t size)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c = 0;
+    size_t count = 0;
+    while(count < size && xQueueReceive(rx_queue, &c, 0)){
+        buffer[count++] = c;
+    }
+    return count;
+}
+
+/*
+ * DEBUG
+*/
+
+void HWCDC::setDebugOutput(bool en)
+{
+    if(en) {
+        uartSetDebug(NULL);
+        ets_install_putc1((void (*)(char)) &cdc0_write_char);
+    } else {
+        ets_install_putc1(NULL);
+    }
+}
+
+#if ARDUINO_HW_CDC_ON_BOOT //Serial used for USB CDC
+HWCDC Serial;
+#else
+HWCDC USBSerial;
+#endif
+
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/HWCDC.h

@@ -0,0 +1,107 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#pragma once
+
+#include "sdkconfig.h"
+#if CONFIG_IDF_TARGET_ESP32C3
+
+#include <inttypes.h>
+#include "esp_event.h"
+#include "Stream.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_HW_CDC_EVENTS);
+
+typedef enum {
+    ARDUINO_HW_CDC_ANY_EVENT = ESP_EVENT_ANY_ID,
+    ARDUINO_HW_CDC_CONNECTED_EVENT = 0,
+    ARDUINO_HW_CDC_BUS_RESET_EVENT,
+    ARDUINO_HW_CDC_RX_EVENT,
+    ARDUINO_HW_CDC_TX_EVENT,
+    ARDUINO_HW_CDC_MAX_EVENT,
+} arduino_hw_cdc_event_t;
+
+typedef union {
+    struct {
+            size_t len;
+    } rx;
+    struct {
+            size_t len;
+    } tx;
+} arduino_hw_cdc_event_data_t;
+
+class HWCDC: public Stream
+{
+public:
+    HWCDC();
+    ~HWCDC();
+
+    void onEvent(esp_event_handler_t callback);
+    void onEvent(arduino_hw_cdc_event_t event, esp_event_handler_t callback);
+
+    size_t setRxBufferSize(size_t);
+    size_t setTxBufferSize(size_t);
+    void setTxTimeoutMs(uint32_t timeout);
+    void begin(unsigned long baud=0);
+    void end();
+    
+    int available(void);
+    int availableForWrite(void);
+    int peek(void);
+    int read(void);
+    size_t read(uint8_t *buffer, size_t size);
+    size_t write(uint8_t);
+    size_t write(const uint8_t *buffer, size_t size);
+    void flush(void);
+    
+    inline size_t read(char * buffer, size_t size)
+    {
+        return read((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * buffer, size_t size)
+    {
+        return write((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * s)
+    {
+        return write((uint8_t*) s, strlen(s));
+    }
+    inline size_t write(unsigned long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(unsigned int n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(int n)
+    {
+        return write((uint8_t) n);
+    }
+    operator bool() const;
+    void setDebugOutput(bool);
+    uint32_t baudRate(){return 115200;}
+
+};
+
+#if ARDUINO_HW_CDC_ON_BOOT //Serial used for USB CDC
+extern HWCDC Serial;
+#else
+extern HWCDC USBSerial;
+#endif
+
+#endif /* CONFIG_IDF_TARGET_ESP32C3 */

cores/esp32/HardwareSerial.cpp

@@ -0,0 +1,289 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "pins_arduino.h"
+#include "HardwareSerial.h"
+#include "soc/soc_caps.h"
+
+#ifndef SOC_RX0
+#if CONFIG_IDF_TARGET_ESP32
+#define SOC_RX0 3
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define SOC_RX0 44
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define SOC_RX0 20
+#endif
+#endif
+
+#ifndef SOC_TX0
+#if CONFIG_IDF_TARGET_ESP32
+#define SOC_TX0 1
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define SOC_TX0 43
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define SOC_TX0 21
+#endif
+#endif
+
+void serialEvent(void) __attribute__((weak));
+void serialEvent(void) {}
+
+#if SOC_UART_NUM > 1
+
+#ifndef RX1
+#if CONFIG_IDF_TARGET_ESP32
+#define RX1 9
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define RX1 18
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define RX1 18
+#endif
+#endif
+
+#ifndef TX1
+#if CONFIG_IDF_TARGET_ESP32
+#define TX1 10
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define TX1 17
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define TX1 19
+#endif
+#endif
+
+void serialEvent1(void) __attribute__((weak));
+void serialEvent1(void) {}
+#endif /* SOC_UART_NUM > 1 */
+
+#if SOC_UART_NUM > 2
+#ifndef RX2
+#if CONFIG_IDF_TARGET_ESP32
+#define RX2 16
+#endif
+#endif
+
+#ifndef TX2
+#if CONFIG_IDF_TARGET_ESP32
+#define TX2 17
+#endif
+#endif
+
+void serialEvent2(void) __attribute__((weak));
+void serialEvent2(void) {}
+#endif /* SOC_UART_NUM > 2 */
+
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+HardwareSerial Serial0(0);
+#elif ARDUINO_HW_CDC_ON_BOOT
+HardwareSerial Serial0(0);
+#else
+HardwareSerial Serial(0);
+#endif
+#if SOC_UART_NUM > 1
+HardwareSerial Serial1(1);
+#endif
+#if SOC_UART_NUM > 2
+HardwareSerial Serial2(2);
+#endif
+
+void serialEventRun(void)
+{
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+    if(Serial0.available()) serialEvent();
+#elif ARDUINO_HW_CDC_ON_BOOT
+    if(Serial0.available()) serialEvent();
+#else
+    if(Serial.available()) serialEvent();
+#endif
+#if SOC_UART_NUM > 1
+    if(Serial1.available()) serialEvent1();
+#endif
+#if SOC_UART_NUM > 2
+    if(Serial2.available()) serialEvent2();
+#endif
+}
+#endif
+
+
+HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL), _rxBufferSize(256) {}
+
+void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert, unsigned long timeout_ms, uint8_t rxfifo_full_thrhd)
+{
+    if(0 > _uart_nr || _uart_nr >= SOC_UART_NUM) {
+        log_e("Serial number is invalid, please use numers from 0 to %u", SOC_UART_NUM - 1);
+        return;
+    }
+    if(_uart) {
+        // in this case it is a begin() over a previous begin() - maybe to change baud rate
+        // thus do not disable debug output
+        end(false);
+    }
+    if(_uart_nr == 0 && rxPin < 0 && txPin < 0) {
+        rxPin = SOC_RX0;
+        txPin = SOC_TX0;
+    }
+#if SOC_UART_NUM > 1
+    if(_uart_nr == 1 && rxPin < 0 && txPin < 0) {
+        rxPin = RX1;
+        txPin = TX1;
+    }
+#endif
+#if SOC_UART_NUM > 2
+    if(_uart_nr == 2 && rxPin < 0 && txPin < 0) {
+        rxPin = RX2;
+        txPin = TX2;
+    }
+#endif
+
+    _uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, _rxBufferSize, invert, rxfifo_full_thrhd);
+    if (!baud) {
+        // using baud rate as zero, forces it to try to detect the current baud rate in place
+        uartStartDetectBaudrate(_uart);
+        time_t startMillis = millis();
+        unsigned long detectedBaudRate = 0;
+        while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {
+            yield();
+        }
+
+        end(false);
+
+        if(detectedBaudRate) {
+            delay(100); // Give some time...
+            _uart = uartBegin(_uart_nr, detectedBaudRate, config, rxPin, txPin, _rxBufferSize, invert, rxfifo_full_thrhd);
+        } else {
+            log_e("Could not detect baudrate. Serial data at the port must be present within the timeout for detection to be possible");
+            _uart = NULL;
+        }
+    }
+}
+
+void HardwareSerial::updateBaudRate(unsigned long baud)
+{
+	uartSetBaudRate(_uart, baud);
+}
+
+void HardwareSerial::end(bool turnOffDebug)
+{
+    if(turnOffDebug && uartGetDebug() == _uart_nr) {
+        uartSetDebug(0);
+    }
+    delay(10);
+    uartEnd(_uart);
+    _uart = 0;
+}
+
+void HardwareSerial::setDebugOutput(bool en)
+{
+    if(_uart == 0) {
+        return;
+    }
+    if(en) {
+        uartSetDebug(_uart);
+    } else {
+        if(uartGetDebug() == _uart_nr) {
+            uartSetDebug(NULL);
+        }
+    }
+}
+
+int HardwareSerial::available(void)
+{
+    return uartAvailable(_uart);
+}
+int HardwareSerial::availableForWrite(void)
+{
+    return uartAvailableForWrite(_uart);
+}
+
+int HardwareSerial::peek(void)
+{
+    if (available()) {
+        return uartPeek(_uart);
+    }
+    return -1;
+}
+
+int HardwareSerial::read(void)
+{
+    if(available()) {
+        return uartRead(_uart);
+    }
+    return -1;
+}
+
+// read characters into buffer
+// terminates if size characters have been read, or no further are pending
+// returns the number of characters placed in the buffer
+// the buffer is NOT null terminated.
+size_t HardwareSerial::read(uint8_t *buffer, size_t size)
+{
+    size_t avail = available();
+    if (size < avail) {
+        avail = size;
+    }
+    size_t count = 0;
+    while(count < avail) {
+        *buffer++ = uartRead(_uart);
+        count++;
+    }
+    return count;
+}
+
+void HardwareSerial::flush(void)
+{
+    uartFlush(_uart);
+}
+
+void HardwareSerial::flush(bool txOnly)
+{
+    uartFlushTxOnly(_uart, txOnly);
+}
+
+size_t HardwareSerial::write(uint8_t c)
+{
+    uartWrite(_uart, c);
+    return 1;
+}
+
+size_t HardwareSerial::write(const uint8_t *buffer, size_t size)
+{
+    uartWriteBuf(_uart, buffer, size);
+    return size;
+}
+uint32_t  HardwareSerial::baudRate()
+
+{
+	return uartGetBaudRate(_uart);
+}
+HardwareSerial::operator bool() const
+{
+    return uartIsDriverInstalled(_uart);
+}
+
+void HardwareSerial::setRxInvert(bool invert)
+{
+    uartSetRxInvert(_uart, invert);
+}
+
+void HardwareSerial::setPins(uint8_t rxPin, uint8_t txPin)
+{
+    uartSetPins(_uart, rxPin, txPin);
+}
+
+size_t HardwareSerial::setRxBufferSize(size_t new_size) {
+
+    if (_uart) {
+        log_e("RX Buffer can't be resized when Serial is already running.\n");
+        return 0;
+    }
+
+    if (new_size <= SOC_UART_FIFO_LEN) {
+        log_e("RX Buffer must be higher than %d.\n", SOC_UART_FIFO_LEN);
+        return 0;
+    }
+
+    _rxBufferSize = new_size;
+    return _rxBufferSize;
+}

cores/esp32/HardwareSerial.h

@@ -0,0 +1,138 @@
+/*
+ HardwareSerial.h - Hardware serial library for Wiring
+ Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Modified 28 September 2010 by Mark Sproul
+ Modified 14 August 2012 by Alarus
+ Modified 3 December 2013 by Matthijs Kooijman
+ Modified 18 December 2014 by Ivan Grokhotkov (esp8266 platform support)
+ Modified 31 March 2015 by Markus Sattler (rewrite the code for UART0 + UART1 support in ESP8266)
+ Modified 25 April 2015 by Thomas Flayols (add configuration different from 8N1 in ESP8266)
+ Modified 13 October 2018 by Jeroen Döll (add baudrate detection)
+ Baudrate detection example usage (detection on Serial1):
+   void setup() {
+     Serial.begin(115200);
+     delay(100);
+     Serial.println();
+
+     Serial1.begin(0, SERIAL_8N1, -1, -1, true, 11000UL);  // Passing 0 for baudrate to detect it, the last parameter is a timeout in ms
+
+     unsigned long detectedBaudRate = Serial1.baudRate();
+     if(detectedBaudRate) {
+       Serial.printf("Detected baudrate is %lu\n", detectedBaudRate);
+     } else {
+       Serial.println("No baudrate detected, Serial1 will not work!");
+     }
+   }
+
+ Pay attention: the baudrate returned by baudRate() may be rounded, eg 115200 returns 115201
+ */
+
+#ifndef HardwareSerial_h
+#define HardwareSerial_h
+
+#include <inttypes.h>
+
+#include "Stream.h"
+#include "esp32-hal.h"
+#include "soc/soc_caps.h"
+#include "HWCDC.h"
+
+class HardwareSerial: public Stream
+{
+public:
+    HardwareSerial(int uart_nr);
+
+    void begin(unsigned long baud, uint32_t config=SERIAL_8N1, int8_t rxPin=-1, int8_t txPin=-1, bool invert=false, unsigned long timeout_ms = 20000UL, uint8_t rxfifo_full_thrhd = 112);
+    void end(bool turnOffDebug = true);
+    void updateBaudRate(unsigned long baud);
+    int available(void);
+    int availableForWrite(void);
+    int peek(void);
+    int read(void);
+    size_t read(uint8_t *buffer, size_t size);
+    inline size_t read(char * buffer, size_t size)
+    {
+        return read((uint8_t*) buffer, size);
+    }
+    void flush(void);
+    void flush( bool txOnly);
+    size_t write(uint8_t);
+    size_t write(const uint8_t *buffer, size_t size);
+    inline size_t write(const char * buffer, size_t size)
+    {
+        return write((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * s)
+    {
+        return write((uint8_t*) s, strlen(s));
+    }
+    inline size_t write(unsigned long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(unsigned int n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(int n)
+    {
+        return write((uint8_t) n);
+    }
+    uint32_t baudRate();
+    operator bool() const;
+
+    void setDebugOutput(bool);
+    
+    void setRxInvert(bool);
+    void setPins(uint8_t rxPin, uint8_t txPin);
+    size_t setRxBufferSize(size_t new_size);
+
+protected:
+    int _uart_nr;
+    uart_t* _uart;
+    size_t _rxBufferSize;
+};
+
+extern void serialEventRun(void) __attribute__((weak));
+
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#ifndef ARDUINO_USB_CDC_ON_BOOT
+#define ARDUINO_USB_CDC_ON_BOOT 0
+#endif
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+#include "USB.h"
+#include "USBCDC.h"
+extern HardwareSerial Serial0;
+#elif ARDUINO_HW_CDC_ON_BOOT
+extern HardwareSerial Serial0;
+#else
+extern HardwareSerial Serial;
+#endif
+#if SOC_UART_NUM > 1
+extern HardwareSerial Serial1;
+#endif
+#if SOC_UART_NUM > 2
+extern HardwareSerial Serial2;
+#endif
+#endif
+
+#endif // HardwareSerial_h

cores/esp32/IPAddress.cpp

@@ -0,0 +1,122 @@
+/*
+ IPAddress.cpp - Base class that provides IPAddress
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <Arduino.h>
+#include <IPAddress.h>
+#include <Print.h>
+
+IPAddress::IPAddress()
+{
+    _address.dword = 0;
+}
+
+IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet)
+{
+    _address.bytes[0] = first_octet;
+    _address.bytes[1] = second_octet;
+    _address.bytes[2] = third_octet;
+    _address.bytes[3] = fourth_octet;
+}
+
+IPAddress::IPAddress(uint32_t address)
+{
+    _address.dword = address;
+}
+
+IPAddress::IPAddress(const uint8_t *address)
+{
+    memcpy(_address.bytes, address, sizeof(_address.bytes));
+}
+
+IPAddress& IPAddress::operator=(const uint8_t *address)
+{
+    memcpy(_address.bytes, address, sizeof(_address.bytes));
+    return *this;
+}
+
+IPAddress& IPAddress::operator=(uint32_t address)
+{
+    _address.dword = address;
+    return *this;
+}
+
+bool IPAddress::operator==(const uint8_t* addr) const
+{
+    return memcmp(addr, _address.bytes, sizeof(_address.bytes)) == 0;
+}
+
+size_t IPAddress::printTo(Print& p) const
+{
+    size_t n = 0;
+    for(int i = 0; i < 3; i++) {
+        n += p.print(_address.bytes[i], DEC);
+        n += p.print('.');
+    }
+    n += p.print(_address.bytes[3], DEC);
+    return n;
+}
+
+String IPAddress::toString() const
+{
+    char szRet[16];
+    sprintf(szRet,"%u.%u.%u.%u", _address.bytes[0], _address.bytes[1], _address.bytes[2], _address.bytes[3]);
+    return String(szRet);
+}
+
+bool IPAddress::fromString(const char *address)
+{
+    // TODO: add support for "a", "a.b", "a.b.c" formats
+
+    uint16_t acc = 0; // Accumulator
+    uint8_t dots = 0;
+
+    while (*address)
+    {
+        char c = *address++;
+        if (c >= '0' && c <= '9')
+        {
+            acc = acc * 10 + (c - '0');
+            if (acc > 255) {
+                // Value out of [0..255] range
+                return false;
+            }
+        }
+        else if (c == '.')
+        {
+            if (dots == 3) {
+                // Too much dots (there must be 3 dots)
+                return false;
+            }
+            _address.bytes[dots++] = acc;
+            acc = 0;
+        }
+        else
+        {
+            // Invalid char
+            return false;
+        }
+    }
+
+    if (dots != 3) {
+        // Too few dots (there must be 3 dots)
+        return false;
+    }
+    _address.bytes[3] = acc;
+    return true;
+}

cores/esp32/IPAddress.h

@@ -0,0 +1,96 @@
+/*
+ IPAddress.h - Base class that provides IPAddress
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef IPAddress_h
+#define IPAddress_h
+
+#include <stdint.h>
+#include <WString.h>
+#include <Printable.h>
+
+// A class to make it easier to handle and pass around IP addresses
+
+class IPAddress: public Printable
+{
+private:
+    union {
+        uint8_t bytes[4];  // IPv4 address
+        uint32_t dword;
+    } _address;
+
+    // Access the raw byte array containing the address.  Because this returns a pointer
+    // to the internal structure rather than a copy of the address this function should only
+    // be used when you know that the usage of the returned uint8_t* will be transient and not
+    // stored.
+    uint8_t* raw_address()
+    {
+        return _address.bytes;
+    }
+
+public:
+    // Constructors
+    IPAddress();
+    IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet);
+    IPAddress(uint32_t address);
+    IPAddress(const uint8_t *address);
+    virtual ~IPAddress() {}
+
+    bool fromString(const char *address);
+    bool fromString(const String &address) { return fromString(address.c_str()); }
+
+    // Overloaded cast operator to allow IPAddress objects to be used where a pointer
+    // to a four-byte uint8_t array is expected
+    operator uint32_t() const
+    {
+        return _address.dword;
+    }
+    bool operator==(const IPAddress& addr) const
+    {
+        return _address.dword == addr._address.dword;
+    }
+    bool operator==(const uint8_t* addr) const;
+
+    // Overloaded index operator to allow getting and setting individual octets of the address
+    uint8_t operator[](int index) const
+    {
+        return _address.bytes[index];
+    }
+    uint8_t& operator[](int index)
+    {
+        return _address.bytes[index];
+    }
+
+    // Overloaded copy operators to allow initialisation of IPAddress objects from other types
+    IPAddress& operator=(const uint8_t *address);
+    IPAddress& operator=(uint32_t address);
+
+    virtual size_t printTo(Print& p) const;
+    String toString() const;
+
+    friend class EthernetClass;
+    friend class UDP;
+    friend class Client;
+    friend class Server;
+    friend class DhcpClass;
+    friend class DNSClient;
+};
+
+const IPAddress INADDR_NONE(0, 0, 0, 0);
+
+#endif

cores/esp32/IPv6Address.cpp

@@ -0,0 +1,90 @@
+/*
+ IPv6Address.cpp - Base class that provides IPv6Address
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <Arduino.h>
+#include <IPv6Address.h>
+#include <Print.h>
+
+IPv6Address::IPv6Address()
+{
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+}
+
+IPv6Address::IPv6Address(const uint8_t *address)
+{
+    memcpy(_address.bytes, address, sizeof(_address.bytes));
+}
+
+IPv6Address::IPv6Address(const uint32_t *address)
+{
+    memcpy(_address.bytes, (const uint8_t *)address, sizeof(_address.bytes));
+}
+
+IPv6Address& IPv6Address::operator=(const uint8_t *address)
+{
+    memcpy(_address.bytes, address, sizeof(_address.bytes));
+    return *this;
+}
+
+bool IPv6Address::operator==(const uint8_t* addr) const
+{
+    return memcmp(addr, _address.bytes, sizeof(_address.bytes)) == 0;
+}
+
+size_t IPv6Address::printTo(Print& p) const
+{
+    size_t n = 0;
+    for(int i = 0; i < 16; i+=2) {
+        if(i){
+            n += p.print(':');
+        }
+        n += p.printf("%02x", _address.bytes[i]);
+        n += p.printf("%02x", _address.bytes[i+1]);
+
+    }
+    return n;
+}
+
+String IPv6Address::toString() const
+{
+    char szRet[40];
+    sprintf(szRet,"%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
+            _address.bytes[0], _address.bytes[1], _address.bytes[2], _address.bytes[3],
+            _address.bytes[4], _address.bytes[5], _address.bytes[6], _address.bytes[7],
+            _address.bytes[8], _address.bytes[9], _address.bytes[10], _address.bytes[11],
+            _address.bytes[12], _address.bytes[13], _address.bytes[14], _address.bytes[15]);
+    return String(szRet);
+}
+
+bool IPv6Address::fromString(const char *address)
+{
+    //format 0011:2233:4455:6677:8899:aabb:ccdd:eeff
+    if(strlen(address) != 39){
+        return false;
+    }
+    char * pos = (char *)address;
+    size_t i = 0;
+    for(i = 0; i < 16; i+=2) {
+        if(!sscanf(pos, "%2hhx", &_address.bytes[i]) || !sscanf(pos+2, "%2hhx", &_address.bytes[i+1])){
+            return false;
+        }
+        pos += 5;
+    }
+    return true;
+}

cores/esp32/IPv6Address.h

@@ -0,0 +1,94 @@
+/*
+ IPv6Address.h - Base class that provides IPv6Address
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef IPv6Address_h
+#define IPv6Address_h
+
+#include <stdint.h>
+#include <WString.h>
+#include <Printable.h>
+
+// A class to make it easier to handle and pass around IP addresses
+
+class IPv6Address: public Printable
+{
+private:
+    union {
+        uint8_t bytes[16];  // IPv4 address
+        uint32_t dword[4];
+    } _address;
+
+    // Access the raw byte array containing the address.  Because this returns a pointer
+    // to the internal structure rather than a copy of the address this function should only
+    // be used when you know that the usage of the returned uint8_t* will be transient and not
+    // stored.
+    uint8_t* raw_address()
+    {
+        return _address.bytes;
+    }
+
+public:
+    // Constructors
+    IPv6Address();
+    IPv6Address(const uint8_t *address);
+    IPv6Address(const uint32_t *address);
+    virtual ~IPv6Address() {}
+
+    bool fromString(const char *address);
+    bool fromString(const String &address) { return fromString(address.c_str()); }
+
+    operator const uint8_t*() const
+    {
+        return _address.bytes;
+    }
+    operator const uint32_t*() const
+    {
+        return _address.dword;
+    }
+    bool operator==(const IPv6Address& addr) const
+    {
+        return (_address.dword[0] == addr._address.dword[0])
+            && (_address.dword[1] == addr._address.dword[1])
+            && (_address.dword[2] == addr._address.dword[2])
+            && (_address.dword[3] == addr._address.dword[3]);
+    }
+    bool operator==(const uint8_t* addr) const;
+
+    // Overloaded index operator to allow getting and setting individual octets of the address
+    uint8_t operator[](int index) const
+    {
+        return _address.bytes[index];
+    }
+    uint8_t& operator[](int index)
+    {
+        return _address.bytes[index];
+    }
+
+    // Overloaded copy operators to allow initialisation of IPv6Address objects from other types
+    IPv6Address& operator=(const uint8_t *address);
+
+    virtual size_t printTo(Print& p) const;
+    String toString() const;
+
+    friend class UDP;
+    friend class Client;
+    friend class Server;
+};
+
+#endif

cores/esp32/MD5Builder.cpp

@@ -0,0 +1,117 @@
+/* 
+  Copyright (c) 2015 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+ 
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include <Arduino.h>
+#include <MD5Builder.h>
+
+uint8_t hex_char_to_byte(uint8_t c)
+{
+    return  (c >= 'a' && c <= 'f') ? (c - ((uint8_t)'a' - 0xa)) :
+            (c >= 'A' && c <= 'F') ? (c - ((uint8_t)'A' - 0xA)) :
+            (c >= '0' &&  c<= '9') ? (c - (uint8_t)'0') : 0;
+}
+
+void MD5Builder::begin(void)
+{
+    memset(_buf, 0x00, 16);
+    MD5Init(&_ctx);
+}
+
+void MD5Builder::add(uint8_t * data, uint16_t len)
+{
+    MD5Update(&_ctx, data, len);
+}
+
+void MD5Builder::addHexString(const char * data)
+{
+    uint16_t i, len = strlen(data);
+    uint8_t * tmp = (uint8_t*)malloc(len/2);
+    if(tmp == NULL) {
+        return;
+    }
+    for(i=0; i<len; i+=2) {
+        uint8_t high = hex_char_to_byte(data[i]);
+        uint8_t low = hex_char_to_byte(data[i+1]);
+        tmp[i/2] = (high & 0x0F) << 4 | (low & 0x0F);
+    }
+    add(tmp, len/2);
+    free(tmp);
+}
+
+bool MD5Builder::addStream(Stream & stream, const size_t maxLen)
+{
+    const int buf_size = 512;
+    int maxLengthLeft = maxLen;
+    uint8_t * buf = (uint8_t*) malloc(buf_size);
+
+    if(!buf) {
+        return false;
+    }
+
+    int bytesAvailable = stream.available();
+    while((bytesAvailable > 0) && (maxLengthLeft > 0)) {
+
+        // determine number of bytes to read
+        int readBytes = bytesAvailable;
+        if(readBytes > maxLengthLeft) {
+            readBytes = maxLengthLeft ;    // read only until max_len
+        }
+        if(readBytes > buf_size) {
+            readBytes = buf_size;    // not read more the buffer can handle
+        }
+
+        // read data and check if we got something
+        int numBytesRead = stream.readBytes(buf, readBytes);
+        if(numBytesRead< 1) {
+            return false;
+        }
+
+        // Update MD5 with buffer payload
+        MD5Update(&_ctx, buf, numBytesRead);
+
+        // update available number of bytes
+        maxLengthLeft -= numBytesRead;
+        bytesAvailable = stream.available();
+    }
+    free(buf);
+    return true;
+}
+
+void MD5Builder::calculate(void)
+{
+    MD5Final(_buf, &_ctx);
+}
+
+void MD5Builder::getBytes(uint8_t * output)
+{
+    memcpy(output, _buf, 16);
+}
+
+void MD5Builder::getChars(char * output)
+{
+    for(uint8_t i = 0; i < 16; i++) {
+        sprintf(output + (i * 2), "%02x", _buf[i]);
+    }
+}
+
+String MD5Builder::toString(void)
+{
+    char out[33];
+    getChars(out);
+    return String(out);
+}

cores/esp32/MD5Builder.h

@@ -0,0 +1,77 @@
+/* 
+  Copyright (c) 2015 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+ 
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef __ESP8266_MD5_BUILDER__
+#define __ESP8266_MD5_BUILDER__
+
+#include <WString.h>
+#include <Stream.h>
+
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/md5_hash.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/md5_hash.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/md5_hash.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/md5_hash.h"
+#endif
+
+class MD5Builder
+{
+private:
+    struct MD5Context _ctx;
+    uint8_t _buf[16];
+public:
+    void begin(void);
+    void add(uint8_t * data, uint16_t len);
+    void add(const char * data)
+    {
+        add((uint8_t*)data, strlen(data));
+    }
+    void add(char * data)
+    {
+        add((const char*)data);
+    }
+    void add(String data)
+    {
+        add(data.c_str());
+    }
+    void addHexString(const char * data);
+    void addHexString(char * data)
+    {
+        addHexString((const char*)data);
+    }
+    void addHexString(String data)
+    {
+        addHexString(data.c_str());
+    }
+    bool addStream(Stream & stream, const size_t maxLen);
+    void calculate(void);
+    void getBytes(uint8_t * output);
+    void getChars(char * output);
+    String toString(void);
+};
+
+
+#endif

cores/esp32/Print.cpp

@@ -0,0 +1,374 @@
+/*
+ Print.cpp - Base class that provides print() and println()
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Modified 23 November 2006 by David A. Mellis
+ Modified December 2014 by Ivan Grokhotkov
+ Modified May 2015 by Michael C. Miller - ESP31B progmem support
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "Arduino.h"
+
+#include "Print.h"
+extern "C" {
+    #include "time.h"
+}
+
+// Public Methods //////////////////////////////////////////////////////////////
+
+/* default implementation: may be overridden */
+size_t Print::write(const uint8_t *buffer, size_t size)
+{
+    size_t n = 0;
+    while(size--) {
+        n += write(*buffer++);
+    }
+    return n;
+}
+
+size_t Print::printf(const char *format, ...)
+{
+    char loc_buf[64];
+    char * temp = loc_buf;
+    va_list arg;
+    va_list copy;
+    va_start(arg, format);
+    va_copy(copy, arg);
+    int len = vsnprintf(temp, sizeof(loc_buf), format, copy);
+    va_end(copy);
+    if(len < 0) {
+        va_end(arg);
+        return 0;
+    };
+    if(len >= sizeof(loc_buf)){
+        temp = (char*) malloc(len+1);
+        if(temp == NULL) {
+            va_end(arg);
+            return 0;
+        }
+        len = vsnprintf(temp, len+1, format, arg);
+    }
+    va_end(arg);
+    len = write((uint8_t*)temp, len);
+    if(temp != loc_buf){
+        free(temp);
+    }
+    return len;
+}
+
+size_t Print::print(const __FlashStringHelper *ifsh)
+{
+    return print(reinterpret_cast<const char *>(ifsh));
+}
+
+size_t Print::print(const String &s)
+{
+    return write(s.c_str(), s.length());
+}
+
+size_t Print::print(const char str[])
+{
+    return write(str);
+}
+
+size_t Print::print(char c)
+{
+    return write(c);
+}
+
+size_t Print::print(unsigned char b, int base)
+{
+    return print((unsigned long) b, base);
+}
+
+size_t Print::print(int n, int base)
+{
+    return print((long) n, base);
+}
+
+size_t Print::print(unsigned int n, int base)
+{
+    return print((unsigned long) n, base);
+}
+
+size_t Print::print(long n, int base)
+{
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
+    }
+    return printNumber(static_cast<unsigned long>(n), base) + t;
+}
+
+size_t Print::print(unsigned long n, int base)
+{
+    if(base == 0) {
+        return write(n);
+    } else {
+        return printNumber(n, base);
+    }
+}
+
+size_t Print::print(long long n, int base)
+{
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
+    }
+    return printNumber(static_cast<unsigned long long>(n), base) + t;
+}
+
+size_t Print::print(unsigned long long n, int base)
+{
+    if (base == 0) {
+        return write(n);
+    } else {
+        return printNumber(n, base);
+    }
+}
+
+size_t Print::print(double n, int digits)
+{
+    return printFloat(n, digits);
+}
+
+size_t Print::println(const __FlashStringHelper *ifsh)
+{
+    size_t n = print(ifsh);
+    n += println();
+    return n;
+}
+
+size_t Print::print(const Printable& x)
+{
+    return x.printTo(*this);
+}
+
+size_t Print::print(struct tm * timeinfo, const char * format)
+{
+    const char * f = format;
+    if(!f){
+        f = "%c";
+    }
+    char buf[64];
+    size_t written = strftime(buf, 64, f, timeinfo);
+    if(written == 0){
+        return written;
+    }
+    return print(buf);
+}
+
+size_t Print::println(void)
+{
+    return print("\r\n");
+}
+
+size_t Print::println(const String &s)
+{
+    size_t n = print(s);
+    n += println();
+    return n;
+}
+
+size_t Print::println(const char c[])
+{
+    size_t n = print(c);
+    n += println();
+    return n;
+}
+
+size_t Print::println(char c)
+{
+    size_t n = print(c);
+    n += println();
+    return n;
+}
+
+size_t Print::println(unsigned char b, int base)
+{
+    size_t n = print(b, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(int num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(unsigned int num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(unsigned long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(long long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(unsigned long long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(double num, int digits)
+{
+    size_t n = print(num, digits);
+    n += println();
+    return n;
+}
+
+size_t Print::println(const Printable& x)
+{
+    size_t n = print(x);
+    n += println();
+    return n;
+}
+
+size_t Print::println(struct tm * timeinfo, const char * format)
+{
+    size_t n = print(timeinfo, format);
+    n += println();
+    return n;
+}
+
+// Private Methods /////////////////////////////////////////////////////////////
+
+size_t Print::printNumber(unsigned long n, uint8_t base)
+{
+    char buf[8 * sizeof(n) + 1]; // Assumes 8-bit chars plus zero byte.
+    char *str = &buf[sizeof(buf) - 1];
+
+    *str = '\0';
+
+    // prevent crash if called with base == 1
+    if(base < 2) {
+        base = 10;
+    }
+
+    do {
+        char c = n % base;
+        n /= base;
+
+        *--str = c < 10 ? c + '0' : c + 'A' - 10;
+    } while (n);
+
+    return write(str);
+}
+
+size_t Print::printNumber(unsigned long long n, uint8_t base)
+{
+    char buf[8 * sizeof(n) + 1]; // Assumes 8-bit chars plus zero byte.
+    char* str = &buf[sizeof(buf) - 1];
+
+    *str = '\0';
+
+    // prevent crash if called with base == 1
+    if (base < 2) {
+        base = 10;
+    }
+
+    do {
+        auto m = n;
+        n /= base;
+        char c = m - base * n;
+
+        *--str = c < 10 ? c + '0' : c + 'A' - 10;
+    } while (n);
+
+    return write(str);
+}
+
+size_t Print::printFloat(double number, uint8_t digits)
+{
+    size_t n = 0;
+
+    if(isnan(number)) {
+        return print("nan");
+    }
+    if(isinf(number)) {
+        return print("inf");
+    }
+    if(number > 4294967040.0) {
+        return print("ovf");    // constant determined empirically
+    }
+    if(number < -4294967040.0) {
+        return print("ovf");    // constant determined empirically
+    }
+
+    // Handle negative numbers
+    if(number < 0.0) {
+        n += print('-');
+        number = -number;
+    }
+
+    // Round correctly so that print(1.999, 2) prints as "2.00"
+    double rounding = 0.5;
+    for(uint8_t i = 0; i < digits; ++i) {
+        rounding /= 10.0;
+    }
+
+    number += rounding;
+
+    // Extract the integer part of the number and print it
+    unsigned long int_part = (unsigned long) number;
+    double remainder = number - (double) int_part;
+    n += print(int_part);
+
+    // Print the decimal point, but only if there are digits beyond
+    if(digits > 0) {
+        n += print(".");
+    }
+
+    // Extract digits from the remainder one at a time
+    while(digits-- > 0) {
+        remainder *= 10.0;
+        int toPrint = int(remainder);
+        n += print(toPrint);
+        remainder -= toPrint;
+    }
+
+    return n;
+}

cores/esp32/Print.h

@@ -0,0 +1,113 @@
+/*
+ Print.h - Base class that provides print() and println()
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef Print_h
+#define Print_h
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include "WString.h"
+#include "Printable.h"
+
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2
+
+class Print
+{
+private:
+    int write_error;
+    size_t printNumber(unsigned long, uint8_t);
+    size_t printNumber(unsigned long long, uint8_t);
+    size_t printFloat(double, uint8_t);
+protected:
+    void setWriteError(int err = 1)
+    {
+        write_error = err;
+    }
+public:
+    Print() :
+        write_error(0)
+    {
+    }
+    virtual ~Print() {}
+    int getWriteError()
+    {
+        return write_error;
+    }
+    void clearWriteError()
+    {
+        setWriteError(0);
+    }
+
+    virtual size_t write(uint8_t) = 0;
+    size_t write(const char *str)
+    {
+        if(str == NULL) {
+            return 0;
+        }
+        return write((const uint8_t *) str, strlen(str));
+    }
+    virtual size_t write(const uint8_t *buffer, size_t size);
+    size_t write(const char *buffer, size_t size)
+    {
+        return write((const uint8_t *) buffer, size);
+    }
+
+    size_t printf(const char * format, ...)  __attribute__ ((format (printf, 2, 3)));
+
+    // add availableForWrite to make compatible with Arduino Print.h
+    // default to zero, meaning "a single write may block"
+    // should be overriden by subclasses with buffering
+    virtual int availableForWrite() { return 0; }
+    size_t print(const __FlashStringHelper *);
+    size_t print(const String &);
+    size_t print(const char[]);
+    size_t print(char);
+    size_t print(unsigned char, int = DEC);
+    size_t print(int, int = DEC);
+    size_t print(unsigned int, int = DEC);
+    size_t print(long, int = DEC);
+    size_t print(unsigned long, int = DEC);
+    size_t print(long long, int = DEC);
+    size_t print(unsigned long long, int = DEC);
+    size_t print(double, int = 2);
+    size_t print(const Printable&);
+    size_t print(struct tm * timeinfo, const char * format = NULL);
+
+    size_t println(const __FlashStringHelper *);
+    size_t println(const String &s);
+    size_t println(const char[]);
+    size_t println(char);
+    size_t println(unsigned char, int = DEC);
+    size_t println(int, int = DEC);
+    size_t println(unsigned int, int = DEC);
+    size_t println(long, int = DEC);
+    size_t println(unsigned long, int = DEC);
+    size_t println(long long, int = DEC);
+    size_t println(unsigned long long, int = DEC);
+    size_t println(double, int = 2);
+    size_t println(const Printable&);
+    size_t println(struct tm * timeinfo, const char * format = NULL);
+    size_t println(void);
+};
+
+#endif

cores/esp32/Printable.h

@@ -0,0 +1,41 @@
+/*
+ Printable.h - Interface class that allows printing of complex types
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef Printable_h
+#define Printable_h
+
+#include <stdlib.h>
+
+class Print;
+
+/** The Printable class provides a way for new classes to allow themselves to be printed.
+ By deriving from Printable and implementing the printTo method, it will then be possible
+ for users to print out instances of this class by passing them into the usual
+ Print::print and Print::println methods.
+ */
+
+class Printable
+{
+public:
+    virtual ~Printable() {}
+    virtual size_t printTo(Print& p) const = 0;
+};
+
+#endif
+

cores/esp32/Server.h

@@ -0,0 +1,31 @@
+/*
+ Server.h - Base class that provides Server
+ Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef server_h
+#define server_h
+
+#include "Print.h"
+
+class Server: public Print
+{
+public:
+    virtual void begin(uint16_t port=0) =0;
+};
+
+#endif

cores/esp32/Stream.cpp

@@ -0,0 +1,337 @@
+/*
+ Stream.cpp - adds parsing methods to Stream class
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Created July 2011
+ parsing functions based on TextFinder library by Michael Margolis
+ */
+
+#include "Arduino.h"
+#include "Stream.h"
+#include "esp32-hal.h"
+
+#define PARSE_TIMEOUT 1000  // default number of milli-seconds to wait
+#define NO_SKIP_CHAR  1  // a magic char not found in a valid ASCII numeric field
+
+// private method to read stream with timeout
+int Stream::timedRead()
+{
+    int c;
+    _startMillis = millis();
+    do {
+        c = read();
+        if(c >= 0) {
+            return c;
+        }
+    } while(millis() - _startMillis < _timeout);
+    return -1;     // -1 indicates timeout
+}
+
+// private method to peek stream with timeout
+int Stream::timedPeek()
+{
+    int c;
+    _startMillis = millis();
+    do {
+        c = peek();
+        if(c >= 0) {
+            return c;
+        }
+    } while(millis() - _startMillis < _timeout);
+    return -1;     // -1 indicates timeout
+}
+
+// returns peek of the next digit in the stream or -1 if timeout
+// discards non-numeric characters
+int Stream::peekNextDigit()
+{
+    int c;
+    while(1) {
+        c = timedPeek();
+        if(c < 0) {
+            return c;    // timeout
+        }
+        if(c == '-') {
+            return c;
+        }
+        if(c >= '0' && c <= '9') {
+            return c;
+        }
+        read();  // discard non-numeric
+    }
+}
+
+// Public Methods
+//////////////////////////////////////////////////////////////
+
+void Stream::setTimeout(unsigned long timeout)  // sets the maximum number of milliseconds to wait
+{
+    _timeout = timeout;
+}
+unsigned long Stream::getTimeout(void) {
+  return _timeout;
+}
+
+// find returns true if the target string is found
+bool  Stream::find(const char *target)
+{
+  return findUntil(target, strlen(target), NULL, 0);
+}
+
+// reads data from the stream until the target string of given length is found
+// returns true if target string is found, false if timed out
+bool Stream::find(const char *target, size_t length)
+{
+  return findUntil(target, length, NULL, 0);
+}
+
+// as find but search ends if the terminator string is found
+bool  Stream::findUntil(const char *target, const char *terminator)
+{
+  return findUntil(target, strlen(target), terminator, strlen(terminator));
+}
+
+// reads data from the stream until the target string of the given length is found
+// search terminated if the terminator string is found
+// returns true if target string is found, false if terminated or timed out
+bool Stream::findUntil(const char *target, size_t targetLen, const char *terminator, size_t termLen)
+{
+  if (terminator == NULL) {
+    MultiTarget t[1] = {{target, targetLen, 0}};
+    return findMulti(t, 1) == 0 ? true : false;
+  } else {
+    MultiTarget t[2] = {{target, targetLen, 0}, {terminator, termLen, 0}};
+    return findMulti(t, 2) == 0 ? true : false;
+  }
+}
+
+int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
+  // any zero length target string automatically matches and would make
+  // a mess of the rest of the algorithm.
+  for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+    if (t->len <= 0)
+      return t - targets;
+  }
+
+  while (1) {
+    int c = timedRead();
+    if (c < 0)
+      return -1;
+
+    for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+      // the simple case is if we match, deal with that first.
+      if (c == t->str[t->index]) {
+        if (++t->index == t->len)
+          return t - targets;
+        else
+          continue;
+      }
+
+      // if not we need to walk back and see if we could have matched further
+      // down the stream (ie '1112' doesn't match the first position in '11112'
+      // but it will match the second position so we can't just reset the current
+      // index to 0 when we find a mismatch.
+      if (t->index == 0)
+        continue;
+
+      int origIndex = t->index;
+      do {
+        --t->index;
+        // first check if current char works against the new current index
+        if (c != t->str[t->index])
+          continue;
+
+        // if it's the only char then we're good, nothing more to check
+        if (t->index == 0) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we need to check the rest of the found string
+        int diff = origIndex - t->index;
+        size_t i;
+        for (i = 0; i < t->index; ++i) {
+          if (t->str[i] != t->str[i + diff])
+            break;
+        }
+
+        // if we successfully got through the previous loop then our current
+        // index is good.
+        if (i == t->index) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we just try the next index
+      } while (t->index);
+    }
+  }
+  // unreachable
+  return -1;
+}
+
+// returns the first valid (long) integer value from the current position.
+// initial characters that are not digits (or the minus sign) are skipped
+// function is terminated by the first character that is not a digit.
+long Stream::parseInt()
+{
+    return parseInt(NO_SKIP_CHAR); // terminate on first non-digit character (or timeout)
+}
+
+// as above but a given skipChar is ignored
+// this allows format characters (typically commas) in values to be ignored
+long Stream::parseInt(char skipChar)
+{
+    boolean isNegative = false;
+    long value = 0;
+    int c;
+
+    c = peekNextDigit();
+    // ignore non numeric leading characters
+    if(c < 0) {
+        return 0;    // zero returned if timeout
+    }
+
+    do {
+        if(c == skipChar) {
+        } // ignore this charactor
+        else if(c == '-') {
+            isNegative = true;
+        } else if(c >= '0' && c <= '9') {    // is c a digit?
+            value = value * 10 + c - '0';
+        }
+        read();  // consume the character we got with peek
+        c = timedPeek();
+    } while((c >= '0' && c <= '9') || c == skipChar);
+
+    if(isNegative) {
+        value = -value;
+    }
+    return value;
+}
+
+// as parseInt but returns a floating point value
+float Stream::parseFloat()
+{
+    return parseFloat(NO_SKIP_CHAR);
+}
+
+// as above but the given skipChar is ignored
+// this allows format characters (typically commas) in values to be ignored
+float Stream::parseFloat(char skipChar)
+{
+    boolean isNegative = false;
+    boolean isFraction = false;
+    long value = 0;
+    int c;
+    float fraction = 1.0;
+
+    c = peekNextDigit();
+    // ignore non numeric leading characters
+    if(c < 0) {
+        return 0;    // zero returned if timeout
+    }
+
+    do {
+        if(c == skipChar) {
+        } // ignore
+        else if(c == '-') {
+            isNegative = true;
+        } else if(c == '.') {
+            isFraction = true;
+        } else if(c >= '0' && c <= '9') {    // is c a digit?
+            value = value * 10 + c - '0';
+            if(isFraction) {
+                fraction *= 0.1f;
+            }
+        }
+        read();  // consume the character we got with peek
+        c = timedPeek();
+    } while((c >= '0' && c <= '9') || c == '.' || c == skipChar);
+
+    if(isNegative) {
+        value = -value;
+    }
+    if(isFraction) {
+        return value * fraction;
+    } else {
+        return value;
+    }
+}
+
+// read characters from stream into buffer
+// terminates if length characters have been read, or timeout (see setTimeout)
+// returns the number of characters placed in the buffer
+// the buffer is NOT null terminated.
+//
+size_t Stream::readBytes(char *buffer, size_t length)
+{
+    size_t count = 0;
+    while(count < length) {
+        int c = timedRead();
+        if(c < 0) {
+            break;
+        }
+        *buffer++ = (char) c;
+        count++;
+    }
+    return count;
+}
+
+// as readBytes with terminator character
+// terminates if length characters have been read, timeout, or if the terminator character  detected
+// returns the number of characters placed in the buffer (0 means no valid data found)
+
+size_t Stream::readBytesUntil(char terminator, char *buffer, size_t length)
+{
+    if(length < 1) {
+        return 0;
+    }
+    size_t index = 0;
+    while(index < length) {
+        int c = timedRead();
+        if(c < 0 || c == terminator) {
+            break;
+        }
+        *buffer++ = (char) c;
+        index++;
+    }
+    return index; // return number of characters, not including null terminator
+}
+
+String Stream::readString()
+{
+    String ret;
+    int c = timedRead();
+    while(c >= 0) {
+        ret += (char) c;
+        c = timedRead();
+    }
+    return ret;
+}
+
+String Stream::readStringUntil(char terminator)
+{
+    String ret;
+    int c = timedRead();
+    while(c >= 0 && c != terminator) {
+        ret += (char) c;
+        c = timedRead();
+    }
+    return ret;
+}
+

cores/esp32/Stream.h

@@ -0,0 +1,140 @@
+/*
+ Stream.h - base class for character-based streams.
+ Copyright (c) 2010 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ parsing functions based on TextFinder library by Michael Margolis
+ */
+
+#ifndef Stream_h
+#define Stream_h
+
+#include <inttypes.h>
+#include "Print.h"
+
+// compatability macros for testing
+/*
+ #define   getInt()            parseInt()
+ #define   getInt(skipChar)    parseInt(skipchar)
+ #define   getFloat()          parseFloat()
+ #define   getFloat(skipChar)  parseFloat(skipChar)
+ #define   getString( pre_string, post_string, buffer, length)
+ readBytesBetween( pre_string, terminator, buffer, length)
+ */
+
+class Stream: public Print
+{
+protected:
+    unsigned long _timeout;      // number of milliseconds to wait for the next char before aborting timed read
+    unsigned long _startMillis;  // used for timeout measurement
+    int timedRead();    // private method to read stream with timeout
+    int timedPeek();    // private method to peek stream with timeout
+    int peekNextDigit(); // returns the next numeric digit in the stream or -1 if timeout
+
+public:
+    virtual int available() = 0;
+    virtual int read() = 0;
+    virtual int peek() = 0;
+    virtual void flush() = 0;
+
+    Stream():_startMillis(0)
+    {
+        _timeout = 1000;
+    }
+    virtual ~Stream() {}
+
+// parsing methods
+
+    void setTimeout(unsigned long timeout);  // sets maximum milliseconds to wait for stream data, default is 1 second
+    unsigned long getTimeout(void);
+      
+    bool find(const char *target);   // reads data from the stream until the target string is found
+    bool find(uint8_t *target)
+    {
+        return find((char *) target);
+    }
+    // returns true if target string is found, false if timed out (see setTimeout)
+
+    bool find(const char *target, size_t length);   // reads data from the stream until the target string of given length is found
+    bool find(const uint8_t *target, size_t length)
+    {
+        return find((char *) target, length);
+    }
+    // returns true if target string is found, false if timed out
+
+    bool find(char target)
+    {
+        return find (&target, 1);
+    }
+
+    bool findUntil(const char *target, const char *terminator);   // as find but search ends if the terminator string is found
+    bool findUntil(const uint8_t *target, const char *terminator)
+    {
+        return findUntil((char *) target, terminator);
+    }
+
+    bool findUntil(const char *target, size_t targetLen, const char *terminate, size_t termLen);   // as above but search ends if the terminate string is found
+    bool findUntil(const uint8_t *target, size_t targetLen, const char *terminate, size_t termLen)
+    {
+        return findUntil((char *) target, targetLen, terminate, termLen);
+    }
+
+    long parseInt(); // returns the first valid (long) integer value from the current position.
+    // initial characters that are not digits (or the minus sign) are skipped
+    // integer is terminated by the first character that is not a digit.
+
+    float parseFloat();               // float version of parseInt
+
+    virtual size_t readBytes(char *buffer, size_t length); // read chars from stream into buffer
+    virtual size_t readBytes(uint8_t *buffer, size_t length)
+    {
+        return readBytes((char *) buffer, length);
+    }
+    // terminates if length characters have been read or timeout (see setTimeout)
+    // returns the number of characters placed in the buffer (0 means no valid data found)
+
+    size_t readBytesUntil(char terminator, char *buffer, size_t length); // as readBytes with terminator character
+    size_t readBytesUntil(char terminator, uint8_t *buffer, size_t length)
+    {
+        return readBytesUntil(terminator, (char *) buffer, length);
+    }
+    // terminates if length characters have been read, timeout, or if the terminator character  detected
+    // returns the number of characters placed in the buffer (0 means no valid data found)
+
+    // Arduino String functions to be added here
+    virtual String readString();
+    String readStringUntil(char terminator);
+
+protected:
+    long parseInt(char skipChar); // as above but the given skipChar is ignored
+    // as above but the given skipChar is ignored
+    // this allows format characters (typically commas) in values to be ignored
+
+    float parseFloat(char skipChar);  // as above but the given skipChar is ignored
+  
+    struct MultiTarget {
+      const char *str;  // string you're searching for
+      size_t len;       // length of string you're searching for
+      size_t index;     // index used by the search routine.
+    };
+
+  // This allows you to search for an arbitrary number of strings.
+  // Returns index of the target that is found first or -1 if timeout occurs.
+  int findMulti(struct MultiTarget *targets, int tCount);
+
+};
+
+#endif

cores/esp32/StreamString.cpp

@@ -0,0 +1,67 @@
+/**
+ StreamString.cpp
+
+ Copyright (c) 2015 Markus Sattler. All rights reserved.
+ This file is part of the esp8266 core for Arduino environment.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ */
+
+#include <Arduino.h>
+#include "StreamString.h"
+
+size_t StreamString::write(const uint8_t *data, size_t size) {
+    if(size && data) {
+        const unsigned int newlen = length() + size;
+        if(reserve(newlen + 1)) {
+            memcpy((void *) (wbuffer() + len()), (const void *) data, size);
+            setLen(newlen);
+            *(wbuffer() + newlen) = 0x00; // add null for string end
+            return size;
+        }
+    }
+    return 0;
+}
+
+size_t StreamString::write(uint8_t data) {
+    return concat((char) data);
+}
+
+int StreamString::available() {
+    return length();
+}
+
+int StreamString::read() {
+    if(length()) {
+        char c = charAt(0);
+        remove(0, 1);
+        return c;
+
+    }
+    return -1;
+}
+
+int StreamString::peek() {
+    if(length()) {
+        char c = charAt(0);
+        return c;
+    }
+    return -1;
+}
+
+void StreamString::flush() {
+}
+

cores/esp32/StreamString.h

@@ -0,0 +1,39 @@
+/**
+ StreamString.h
+
+ Copyright (c) 2015 Markus Sattler. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+#ifndef STREAMSTRING_H_
+#define STREAMSTRING_H_
+
+
+class StreamString: public Stream, public String
+{
+public:
+    size_t write(const uint8_t *buffer, size_t size) override;
+    size_t write(uint8_t data) override;
+
+    int available() override;
+    int read() override;
+    int peek() override;
+    void flush() override;
+};
+
+
+#endif /* STREAMSTRING_H_ */

cores/esp32/USB.cpp

@@ -11,10 +11,14 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+#include "USB.h"
+
+#if CONFIG_TINYUSB_ENABLED
+
+#include "pins_arduino.h"
 #include "esp32-hal.h"
 #include "esp32-hal-tinyusb.h"
-#include "USB.h"
-#if CONFIG_USB_ENABLED
+#include "common/tusb_common.h"
 
 #ifndef USB_VID
 #define USB_VID USB_ESPRESSIF_VID
@@ -31,18 +35,16 @@
 #ifndef USB_SERIAL
 #define USB_SERIAL "0"
 #endif
+#ifndef USB_WEBUSB_ENABLED
+#define USB_WEBUSB_ENABLED false
+#endif
+#ifndef USB_WEBUSB_URL
+#define USB_WEBUSB_URL "https://espressif.github.io/arduino-esp32/webusb.html"
+#endif
 
-extern "C" {
-#include "tinyusb.h"
-}
-
-#if CFG_TUD_DFU_RT
+#if CFG_TUD_DFU_RUNTIME
 static uint16_t load_dfu_descriptor(uint8_t * dst, uint8_t * itf)
 {
-#define DFU_ATTR_CAN_DOWNLOAD              1
-#define DFU_ATTR_CAN_UPLOAD                2
-#define DFU_ATTR_MANIFESTATION_TOLERANT    4
-#define DFU_ATTR_WILL_DETACH               8
 #define DFU_ATTRS (DFU_ATTR_CAN_DOWNLOAD | DFU_ATTR_CAN_UPLOAD | DFU_ATTR_MANIFESTATION_TOLERANT)
 
     uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB DFU_RT");
@@ -55,11 +57,11 @@ static uint16_t load_dfu_descriptor(uint8_t * dst, uint8_t * itf)
     return TUD_DFU_RT_DESC_LEN;
 }
 // Invoked on DFU_DETACH request to reboot to the bootloader
-void tud_dfu_rt_reboot_to_dfu(void)
+void tud_dfu_runtime_reboot_to_dfu_cb(void)
 {
     usb_persist_restart(RESTART_BOOTLOADER_DFU);
 }
-#endif /* CFG_TUD_DFU_RT */
+#endif /* CFG_TUD_DFU_RUNTIME */
 
 ESP_EVENT_DEFINE_BASE(ARDUINO_USB_EVENTS);
 
@@ -84,14 +86,14 @@ static bool tinyusb_device_suspended = false;
 // Invoked when device is mounted (configured)
 void tud_mount_cb(void){
     tinyusb_device_mounted = true;
-    arduino_usb_event_data_t p = {0};
+    arduino_usb_event_data_t p;
     arduino_usb_event_post(ARDUINO_USB_EVENTS, ARDUINO_USB_STARTED_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
 }
 
 // Invoked when device is unmounted
 void tud_umount_cb(void){
     tinyusb_device_mounted = false;
-    arduino_usb_event_data_t p = {0};
+    arduino_usb_event_data_t p;
     arduino_usb_event_post(ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
 }
 
@@ -99,7 +101,7 @@ void tud_umount_cb(void){
 // Within 7ms, device must draw an average of current less than 2.5 mA from bus
 void tud_suspend_cb(bool remote_wakeup_en){
     tinyusb_device_suspended = true;
-    arduino_usb_event_data_t p = {0};
+    arduino_usb_event_data_t p;
     p.suspend.remote_wakeup_en = remote_wakeup_en;
     arduino_usb_event_post(ARDUINO_USB_EVENTS, ARDUINO_USB_SUSPEND_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
 }
@@ -107,7 +109,7 @@ void tud_suspend_cb(bool remote_wakeup_en){
 // Invoked when usb bus is resumed
 void tud_resume_cb(void){
     tinyusb_device_suspended = false;
-    arduino_usb_event_data_t p = {0};
+    arduino_usb_event_data_t p;
     arduino_usb_event_post(ARDUINO_USB_EVENTS, ARDUINO_USB_RESUME_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
 }
 
@@ -124,8 +126,8 @@ ESPUSB::ESPUSB(size_t task_stack_size, uint8_t event_task_priority)
 ,usb_protocol(MISC_PROTOCOL_IAD)
 ,usb_attributes(TUSB_DESC_CONFIG_ATT_SELF_POWERED)
 ,usb_power_ma(500)
-,webusb_enabled(false)
-,webusb_url("espressif.github.io/arduino-esp32/webusb.html")
+,webusb_enabled(USB_WEBUSB_ENABLED)
+,webusb_url(USB_WEBUSB_URL)
 ,_started(false)
 ,_task_stack_size(task_stack_size)
 ,_event_task_priority(event_task_priority)
@@ -187,9 +189,9 @@ ESPUSB::operator bool() const
 }
 
 bool ESPUSB::enableDFU(){
-#if CFG_TUD_DFU_RT
+#if CFG_TUD_DFU_RUNTIME
     return tinyusb_enable_interface(USB_INTERFACE_DFU, TUD_DFU_RT_DESC_LEN, load_dfu_descriptor) == ESP_OK;
-#endif /* CFG_TUD_DFU_RT */
+#endif /* CFG_TUD_DFU_RUNTIME */
     return false;
 }
 
@@ -286,6 +288,9 @@ uint8_t ESPUSB::usbAttributes(void){
 bool ESPUSB::webUSB(bool enabled){
     if(!_started){
         webusb_enabled = enabled;
+        if(enabled && usb_version < 0x0210){
+            usb_version = 0x0210;
+        }
     }
     return !_started;
 }
@@ -335,4 +340,4 @@ const char * ESPUSB::webUSBURL(void){
 
 ESPUSB USB;
 
-#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_TINYUSB_ENABLED */

cores/esp32/USB.h

@@ -14,12 +14,13 @@
 #pragma once
 
 #include "sdkconfig.h"
-#if CONFIG_USB_ENABLED
 
-#include "Arduino.h"
-#include "USBCDC.h"
+#if CONFIG_TINYUSB_ENABLED
 
 #include "esp_event.h"
+#include "USBCDC.h"
+
+#define ARDUINO_USB_ON_BOOT (ARDUINO_USB_CDC_ON_BOOT|ARDUINO_USB_MSC_ON_BOOT|ARDUINO_USB_DFU_ON_BOOT)
 
 ESP_EVENT_DECLARE_BASE(ARDUINO_USB_EVENTS);
 
@@ -115,4 +116,4 @@ class ESPUSB {
 
 extern ESPUSB USB;
 
-#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_TINYUSB_ENABLED */

cores/esp32/USBCDC.cpp

@@ -11,28 +11,22 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include "esp32-hal.h"
-#include "esp32-hal-tinyusb.h"
 #include "USB.h"
+#if CONFIG_TINYUSB_CDC_ENABLED
+
 #include "USBCDC.h"
-#if CONFIG_USB_ENABLED
+#include "esp32-hal-tinyusb.h"
 
 ESP_EVENT_DEFINE_BASE(ARDUINO_USB_CDC_EVENTS);
 esp_err_t arduino_usb_event_post(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait);
 esp_err_t arduino_usb_event_handler_register_with(esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg);
 
-extern "C" {
-#include "tinyusb.h"
-}
-
-#if CFG_TUD_CDC
 #define MAX_USB_CDC_DEVICES 2
 USBCDC * devices[MAX_USB_CDC_DEVICES] = {NULL, NULL};
 
 static uint16_t load_cdc_descriptor(uint8_t * dst, uint8_t * itf)
 {
     uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB CDC");
-    // Interface number, string index, attributes, detach timeout, transfer size */
     uint8_t descriptor[TUD_CDC_DESC_LEN] = {
             // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
             TUD_CDC_DESCRIPTOR(*itf, str_index, 0x85, 64, 0x03, 0x84, 64)
@@ -42,6 +36,7 @@ static uint16_t load_cdc_descriptor(uint8_t * dst, uint8_t * itf)
     return TUD_CDC_DESC_LEN;
 }
 
+// Invoked when line state DTR & RTS are changed via SET_CONTROL_LINE_STATE
 void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
 {
     if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
@@ -49,6 +44,7 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
     }
 }
 
+// Invoked when line coding is change via SET_LINE_CODING
 void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* p_line_coding)
 {
     if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
@@ -56,6 +52,7 @@ void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* p_line_coding)
     }
 }
 
+// Invoked when received new data
 void tud_cdc_rx_cb(uint8_t itf)
 {
     if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
@@ -63,54 +60,52 @@ void tud_cdc_rx_cb(uint8_t itf)
     }
 }
 
-
-static size_t tinyusb_cdc_write(uint8_t itf, const uint8_t *buffer, size_t size){
-    if(itf >= MAX_USB_CDC_DEVICES){
-        return 0;
-    }
-    if(!tud_cdc_n_connected(itf)){
-        return 0;
-    }
-    size_t tosend = size, sofar = 0;
-    while(tosend){
-        uint32_t space = tud_cdc_n_write_available(itf);
-        if(!space){
-            vTaskDelay(1 / portTICK_PERIOD_MS);
-            continue;
-        }
-        if(tosend < space){
-            space = tosend;
-        }
-        uint32_t sent = tud_cdc_n_write(itf, buffer + sofar, space);
-        if(!sent){
-            return sofar;
-        }
-        sofar += sent;
-        tosend -= sent;
-        tud_cdc_n_write_flush(itf);
-    }
-    return sofar;
+// Invoked when received send break
+void tud_cdc_send_break_cb(uint8_t itf, uint16_t duration_ms){
+    //log_v("itf: %u, duration_ms: %u", itf, duration_ms);
 }
 
-static void ARDUINO_ISR_ATTR cdc0_write_char(char c)
-{
-    tinyusb_cdc_write(0, (const uint8_t *)&c, 1);
+// Invoked when space becomes available in TX buffer
+void tud_cdc_tx_complete_cb(uint8_t itf){
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onTX();
+    }
 }
 
-//void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char);
+static void ARDUINO_ISR_ATTR cdc0_write_char(char c){
+    if(devices[0] != NULL){
+        devices[0]->write(c);
+    }
+}
 
 static void usb_unplugged_cb(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
     ((USBCDC*)arg)->_onUnplugged();
 }
 
-USBCDC::USBCDC(uint8_t itfn) : itf(itfn), bit_rate(0), stop_bits(0), parity(0), data_bits(0), dtr(false),  rts(false), connected(false), reboot_enable(true), rx_queue(NULL) {
+USBCDC::USBCDC(uint8_t itfn) 
+: itf(itfn)
+, bit_rate(0)
+, stop_bits(0)
+, parity(0)
+, data_bits(0)
+, dtr(false)
+, rts(false)
+, connected(false)
+, reboot_enable(true)
+, rx_queue(NULL)
+, tx_lock(NULL)
+, tx_timeout_ms(250)
+{
     tinyusb_enable_interface(USB_INTERFACE_CDC, TUD_CDC_DESC_LEN, load_cdc_descriptor);
     if(itf < MAX_USB_CDC_DEVICES){
-        devices[itf] = this;
         arduino_usb_event_handler_register_with(ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, usb_unplugged_cb, this);
     }
 }
 
+USBCDC::~USBCDC(){
+    end();
+}
+
 void USBCDC::onEvent(esp_event_handler_t callback){
     onEvent(ARDUINO_USB_CDC_ANY_EVENT, callback);
 }
@@ -120,6 +115,10 @@ void USBCDC::onEvent(arduino_usb_cdc_event_t event, esp_event_handler_t callback
 
 size_t USBCDC::setRxBufferSize(size_t rx_queue_len){
     if(rx_queue){
+        if(!rx_queue_len){
+            vQueueDelete(rx_queue);
+            rx_queue = NULL;
+        }
         return 0;
     }
     rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));
@@ -131,11 +130,25 @@ size_t USBCDC::setRxBufferSize(size_t rx_queue_len){
 
 void USBCDC::begin(unsigned long baud)
 {
+    if(tx_lock == NULL) {
+        tx_lock = xSemaphoreCreateMutex();
+    }
     setRxBufferSize(256);//default if not preset
+    devices[itf] = this;
 }
 
 void USBCDC::end()
 {
+    connected = false;
+    devices[itf] = NULL;
+    setRxBufferSize(0);
+    if(tx_lock != NULL) {
+        vSemaphoreDelete(tx_lock);
+    }
+}
+
+void USBCDC::setTxTimeoutMs(uint32_t timeout){
+    tx_timeout_ms = timeout;
 }
 
 void USBCDC::_onUnplugged(void){
@@ -143,7 +156,7 @@ void USBCDC::_onUnplugged(void){
         connected = false;
         dtr = false;
         rts = false;
-        arduino_usb_cdc_event_data_t p = {0};
+        arduino_usb_cdc_event_data_t p;
         arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
     }
 }
@@ -151,6 +164,11 @@ void USBCDC::_onUnplugged(void){
 enum { CDC_LINE_IDLE, CDC_LINE_1, CDC_LINE_2, CDC_LINE_3 };
 void USBCDC::_onLineState(bool _dtr, bool _rts){
     static uint8_t lineState = CDC_LINE_IDLE;
+
+    if(dtr == _dtr && rts == _rts){
+        return; // Skip duplicate events
+    }
+
     dtr = _dtr;
     rts = _rts;
 
@@ -158,6 +176,11 @@ void USBCDC::_onLineState(bool _dtr, bool _rts){
         if(!dtr && rts){
             if(lineState == CDC_LINE_IDLE){
                 lineState++;
+                if(connected){
+                    connected = false;
+                    arduino_usb_cdc_event_data_t p;
+                    arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+                }
             } else {
                 lineState = CDC_LINE_IDLE;
             }
@@ -185,14 +208,14 @@ void USBCDC::_onLineState(bool _dtr, bool _rts){
     if(lineState == CDC_LINE_IDLE){
         if(dtr && rts && !connected){
             connected = true;
-            arduino_usb_cdc_event_data_t p = {0};
+            arduino_usb_cdc_event_data_t p;
             arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_CONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
-        } else if(!dtr && !rts && connected){
+        } else if(!dtr && connected){
             connected = false;
-            arduino_usb_cdc_event_data_t p = {0};
+            arduino_usb_cdc_event_data_t p;
             arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
         }
-        arduino_usb_cdc_event_data_t l = {0};
+        arduino_usb_cdc_event_data_t l;
         l.line_state.dtr = dtr;
         l.line_state.rts = rts;
         arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_LINE_STATE_EVENT, &l, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
@@ -202,32 +225,42 @@ void USBCDC::_onLineState(bool _dtr, bool _rts){
 
 void USBCDC::_onLineCoding(uint32_t _bit_rate, uint8_t _stop_bits, uint8_t _parity, uint8_t _data_bits){
     if(bit_rate != _bit_rate || data_bits != _data_bits || stop_bits != _stop_bits || parity != _parity){
-        bit_rate = _bit_rate;
-        data_bits = _data_bits;
-        stop_bits = _stop_bits;
-        parity = _parity;
-        arduino_usb_cdc_event_data_t p = {0};
-        p.line_coding.bit_rate = bit_rate;
-        p.line_coding.data_bits = data_bits;
-        p.line_coding.stop_bits = stop_bits;
-        p.line_coding.parity = parity;
-        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_LINE_CODING_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+        // ArduinoIDE sends LineCoding with 1200bps baud to reset the device
+        if(reboot_enable && _bit_rate == 1200){
+            usb_persist_restart(RESTART_BOOTLOADER);
+        } else {
+            bit_rate = _bit_rate;
+            data_bits = _data_bits;
+            stop_bits = _stop_bits;
+            parity = _parity;
+            arduino_usb_cdc_event_data_t p;
+            p.line_coding.bit_rate = bit_rate;
+            p.line_coding.data_bits = data_bits;
+            p.line_coding.stop_bits = stop_bits;
+            p.line_coding.parity = parity;
+            arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_LINE_CODING_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+        }
     }
 }
 
 void USBCDC::_onRX(){
-    uint8_t buf[CONFIG_USB_CDC_RX_BUFSIZE+1];
-    uint32_t count = tud_cdc_n_read(itf, buf, CONFIG_USB_CDC_RX_BUFSIZE);
+    uint8_t buf[CONFIG_TINYUSB_CDC_RX_BUFSIZE+1];
+    uint32_t count = tud_cdc_n_read(itf, buf, CONFIG_TINYUSB_CDC_RX_BUFSIZE);
     for(uint32_t i=0; i<count; i++){
         if(rx_queue == NULL || !xQueueSend(rx_queue, buf+i, 0)){
             return;
         }
     }
-    arduino_usb_cdc_event_data_t p = {0};
+    arduino_usb_cdc_event_data_t p;
     p.rx.len = count;
     arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_RX_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
 }
 
+void USBCDC::_onTX(){
+    arduino_usb_cdc_event_data_t p;
+    arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_TX_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+}
+
 void  USBCDC::enableReboot(bool enable){
     reboot_enable = enable;
 }
@@ -282,23 +315,73 @@ size_t USBCDC::read(uint8_t *buffer, size_t size)
 
 void USBCDC::flush(void)
 {
-    if(itf >= MAX_USB_CDC_DEVICES){
+    if(itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || !tud_cdc_n_connected(itf)){
+        return;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
         return;
     }
     tud_cdc_n_write_flush(itf);
+    xSemaphoreGive(tx_lock);
 }
 
 int USBCDC::availableForWrite(void)
 {
-    if(itf >= MAX_USB_CDC_DEVICES){
-        return -1;
+    if(itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || !tud_cdc_n_connected(itf)){
+        return 0;
     }
-    return tud_cdc_n_write_available(itf);
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t a = tud_cdc_n_write_available(itf);
+    xSemaphoreGive(tx_lock);
+    return a;
 }
 
 size_t USBCDC::write(const uint8_t *buffer, size_t size)
 {
-    return tinyusb_cdc_write(itf, buffer, size);
+    if(itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || buffer == NULL || size == 0 || !tud_cdc_n_connected(itf)){
+        return 0;
+    }
+    if(xPortInIsrContext()){
+        BaseType_t taskWoken = false;
+        if(xSemaphoreTakeFromISR(tx_lock, &taskWoken) != pdPASS){
+            return 0;
+        }
+    } else if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t to_send = size, so_far = 0;
+    while(to_send){
+        if(!tud_cdc_n_connected(itf)){
+            size = so_far;
+            break;
+        }
+        size_t space = tud_cdc_n_write_available(itf);
+        if(!space){
+            tud_cdc_n_write_flush(itf);
+            continue;
+        }
+        if(space > to_send){
+            space = to_send;
+        }
+        size_t sent = tud_cdc_n_write(itf, buffer+so_far, space);
+        if(sent){
+            so_far += sent;
+            to_send -= sent;
+            tud_cdc_n_write_flush(itf);
+        } else {
+            size = so_far;
+            break;
+        }
+    }
+    if(xPortInIsrContext()){
+        BaseType_t taskWoken = false;
+        xSemaphoreGiveFromISR(tx_lock, &taskWoken);
+    } else {
+        xSemaphoreGive(tx_lock);
+    }
+    return size;
 }
 
 size_t USBCDC::write(uint8_t c)
@@ -329,10 +412,8 @@ USBCDC::operator bool() const
     return connected;
 }
 
-#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
 USBCDC Serial(0);
 #endif
 
-#endif /* CONFIG_USB_CDC_ENABLED */
-
-#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/USBCDC.h

@@ -13,12 +13,15 @@
 // limitations under the License.
 #pragma once
 
+#include "sdkconfig.h"
+#if CONFIG_TINYUSB_CDC_ENABLED
+
 #include <inttypes.h>
-
-#include "esp32-hal.h"
-#if CONFIG_USB_CDC_ENABLED
-
 #include "esp_event.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+#include "Stream.h"
 
 ESP_EVENT_DECLARE_BASE(ARDUINO_USB_CDC_EVENTS);
 
@@ -29,6 +32,7 @@ typedef enum {
     ARDUINO_USB_CDC_LINE_STATE_EVENT,
     ARDUINO_USB_CDC_LINE_CODING_EVENT,
     ARDUINO_USB_CDC_RX_EVENT,
+    ARDUINO_USB_CDC_TX_EVENT,
     ARDUINO_USB_CDC_MAX_EVENT,
 } arduino_usb_cdc_event_t;
 
@@ -48,15 +52,17 @@ typedef union {
     } rx;
 } arduino_usb_cdc_event_data_t;
 
-class USBCDC
+class USBCDC: public Stream
 {
 public:
     USBCDC(uint8_t itf=0);
+    ~USBCDC();
 
     void onEvent(esp_event_handler_t callback);
     void onEvent(arduino_usb_cdc_event_t event, esp_event_handler_t callback);
 
-    size_t setRxBufferSize(size_t);
+    size_t setRxBufferSize(size_t size);
+    void setTxTimeoutMs(uint32_t timeout);
     void begin(unsigned long baud=0);
     void end();
     
@@ -109,6 +115,7 @@ public:
     void _onLineState(bool _dtr, bool _rts);
     void _onLineCoding(uint32_t _bit_rate, uint8_t _stop_bits, uint8_t _parity, uint8_t _data_bits);
     void _onRX(void);
+    void _onTX(void);
     void _onUnplugged(void);
     
 protected:
@@ -122,11 +129,13 @@ protected:
     bool     connected;
     bool     reboot_enable;
     xQueueHandle rx_queue;
+    xSemaphoreHandle tx_lock;
+    uint32_t tx_timeout_ms;
     
 };
 
-#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
 extern USBCDC Serial;
 #endif
 
-#endif /* CONFIG_USB_CDC_ENABLED */
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/USBMSC.cpp

@@ -0,0 +1,260 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "USBMSC.h"
+
+#if CONFIG_TINYUSB_MSC_ENABLED
+
+#include "esp32-hal-tinyusb.h"
+
+extern "C" uint16_t tusb_msc_load_descriptor(uint8_t * dst, uint8_t * itf)
+{
+    uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB MSC");
+    uint8_t ep_num = tinyusb_get_free_duplex_endpoint();
+    TU_VERIFY (ep_num != 0);
+    uint8_t descriptor[TUD_MSC_DESC_LEN] = {
+        // Interface number, string index, EP Out & EP In address, EP size
+        TUD_MSC_DESCRIPTOR(*itf, str_index, ep_num, (uint8_t)(0x80 | ep_num), 64)
+    };
+    *itf+=1;
+    memcpy(dst, descriptor, TUD_MSC_DESC_LEN);
+    return TUD_MSC_DESC_LEN;
+}
+
+typedef struct {
+    bool media_present;
+    uint8_t vendor_id[8];
+    uint8_t product_id[16];
+    uint8_t product_rev[4];
+    uint16_t block_size;
+    uint32_t block_count;
+    bool (*start_stop)(uint8_t power_condition, bool start, bool load_eject);
+    int32_t (*read)(uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize);
+    int32_t (*write)(uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize);
+} msc_lun_t;
+
+static const uint8_t MSC_MAX_LUN = 3;
+static uint8_t MSC_ACTIVE_LUN = 0;
+static msc_lun_t msc_luns[MSC_MAX_LUN];
+
+static void cplstr(void *dst, const void * src, size_t max_len){
+    if(!src || !dst || !max_len){
+        return;
+    }
+    size_t l = strlen((const char *)src);
+    if(l > max_len){
+        l = max_len;
+    }
+    memcpy(dst, src, l);
+}
+
+// Invoked when received GET_MAX_LUN request, required for multiple LUNs implementation
+uint8_t tud_msc_get_maxlun_cb(void)
+{
+    log_v("%u", MSC_ACTIVE_LUN);
+    return MSC_ACTIVE_LUN;
+}
+
+// Invoked when received SCSI_CMD_INQUIRY
+// Application fill vendor id, product id and revision with string up to 8, 16, 4 characters respectively
+void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16], uint8_t product_rev[4])
+{
+    log_v("[%u]", lun);
+    cplstr(vendor_id  , msc_luns[lun].vendor_id, 8);
+    cplstr(product_id , msc_luns[lun].product_id, 16);
+    cplstr(product_rev, msc_luns[lun].product_rev, 4);
+}
+
+// Invoked when received Test Unit Ready command.
+// return true allowing host to read/write this LUN e.g SD card inserted
+bool tud_msc_test_unit_ready_cb(uint8_t lun)
+{
+    log_v("[%u]: %u", lun, msc_luns[lun].media_present);
+    return msc_luns[lun].media_present; // RAM disk is always ready
+}
+
+// Invoked when received SCSI_CMD_READ_CAPACITY_10 and SCSI_CMD_READ_FORMAT_CAPACITY to determine the disk size
+// Application update block count and block size
+void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_size)
+{
+    log_v("[%u]", lun);
+    if(!msc_luns[lun].media_present){
+        *block_count = 0;
+        *block_size  = 0;
+        return;
+    }
+
+    *block_count = msc_luns[lun].block_count;
+    *block_size  = msc_luns[lun].block_size;
+}
+
+// Invoked when received Start Stop Unit command
+// - Start = 0 : stopped power mode, if load_eject = 1 : unload disk storage
+// - Start = 1 : active mode, if load_eject = 1 : load disk storage
+bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, bool load_eject)
+{
+    log_v("[%u] power: %u, start: %u, eject: %u", lun, power_condition, start, load_eject);
+    if(msc_luns[lun].start_stop){
+        return msc_luns[lun].start_stop(power_condition, start, load_eject);
+    }
+    return true;
+}
+
+// Callback invoked when received READ10 command.
+// Copy disk's data to buffer (up to bufsize) and return number of copied bytes.
+int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
+{
+    log_v("[%u], lba: %u, offset: %u, bufsize: %u", lun, lba, offset, bufsize);
+    if(!msc_luns[lun].media_present){
+        return 0;
+    }
+    if(msc_luns[lun].read){
+        return msc_luns[lun].read(lba, offset, buffer, bufsize);
+    }
+    return 0;
+}
+
+// Callback invoked when received WRITE10 command.
+// Process data in buffer to disk's storage and return number of written bytes
+int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize)
+{
+    log_v("[%u], lba: %u, offset: %u, bufsize: %u", lun, lba, offset, bufsize);
+    if(!msc_luns[lun].media_present){
+        return 0;
+    }
+    if(msc_luns[lun].write){
+        return msc_luns[lun].write(lba, offset, buffer, bufsize);
+    }
+    return 0;
+}
+
+// Callback invoked when received an SCSI command not in built-in list below
+// - READ_CAPACITY10, READ_FORMAT_CAPACITY, INQUIRY, MODE_SENSE6, REQUEST_SENSE
+// - READ10 and WRITE10 has their own callbacks
+int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize)
+{
+    // read10 & write10 has their own callback and MUST not be handled here
+    log_v("[%u] cmd: %u, bufsize: %u", lun, scsi_cmd[0], bufsize);
+
+    void const* response = NULL;
+    uint16_t resplen = 0;
+
+    // most scsi handled is input
+    bool in_xfer = true;
+    
+    if(!msc_luns[lun].media_present){
+        return -1;
+    }
+
+    switch (scsi_cmd[0]) {
+        case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
+            // Host is about to read/write etc ... better not to disconnect disk
+            resplen = 0;
+            break;
+
+        default:
+            // Set Sense = Invalid Command Operation
+            tud_msc_set_sense(lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00);
+
+            // negative means error -> tinyusb could stall and/or response with failed status
+            resplen = -1;
+            break;
+    }
+
+    // return resplen must not larger than bufsize
+    if (resplen > bufsize) resplen = bufsize;
+
+    if (response && (resplen > 0)) {
+        if (in_xfer) {
+            memcpy(buffer, response, resplen);
+        } else {
+            // SCSI output
+        }
+    }
+
+    return resplen;
+}
+
+USBMSC::USBMSC(){
+    if(MSC_ACTIVE_LUN < MSC_MAX_LUN){
+        _lun = MSC_ACTIVE_LUN;
+        MSC_ACTIVE_LUN++;
+        msc_luns[_lun].media_present = false;
+        msc_luns[_lun].vendor_id[0] = 0;
+        msc_luns[_lun].product_id[0] = 0;
+        msc_luns[_lun].product_rev[0] = 0;
+        msc_luns[_lun].block_size = 0;
+        msc_luns[_lun].block_count = 0;
+        msc_luns[_lun].start_stop = NULL;
+        msc_luns[_lun].read = NULL;
+        msc_luns[_lun].write = NULL;
+    }
+    if(_lun == 0){
+        tinyusb_enable_interface(USB_INTERFACE_MSC, TUD_MSC_DESC_LEN, tusb_msc_load_descriptor);
+    }
+}
+
+USBMSC::~USBMSC(){
+  end();
+}
+
+bool USBMSC::begin(uint32_t block_count, uint16_t block_size){
+    msc_luns[_lun].block_size = block_size;
+    msc_luns[_lun].block_count = block_count;
+    if(!msc_luns[_lun].block_size || !msc_luns[_lun].block_count || !msc_luns[_lun].read || !msc_luns[_lun].write){
+        return false;
+    }
+    return true;
+}
+
+void USBMSC::end(){
+    msc_luns[_lun].media_present = false;
+    msc_luns[_lun].vendor_id[0] = 0;
+    msc_luns[_lun].product_id[0] = 0;
+    msc_luns[_lun].product_rev[0] = 0;
+    msc_luns[_lun].block_size = 0;
+    msc_luns[_lun].block_count = 0;
+    msc_luns[_lun].start_stop = NULL;
+    msc_luns[_lun].read = NULL;
+    msc_luns[_lun].write = NULL;
+}
+
+void USBMSC::vendorID(const char * vid){
+    cplstr(msc_luns[_lun].vendor_id, vid, 8);
+}
+
+void USBMSC::productID(const char * pid){
+    cplstr(msc_luns[_lun].product_id, pid, 16);
+}
+
+void USBMSC::productRevision(const char * rev){
+    cplstr(msc_luns[_lun].product_rev, rev, 4);
+}
+
+void USBMSC::onStartStop(msc_start_stop_cb cb){
+    msc_luns[_lun].start_stop = cb;
+}
+
+void USBMSC::onRead(msc_read_cb cb){
+    msc_luns[_lun].read = cb;
+}
+
+void USBMSC::onWrite(msc_write_cb cb){
+    msc_luns[_lun].write = cb;
+}
+
+void USBMSC::mediaPresent(bool media_present){
+    msc_luns[_lun].media_present = media_present;
+}
+
+#endif /* CONFIG_TINYUSB_MSC_ENABLED */

cores/esp32/USBMSC.h

@@ -0,0 +1,51 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <stdint.h>
+#include <stdbool.h>
+#include "sdkconfig.h"
+
+#if CONFIG_TINYUSB_MSC_ENABLED
+
+// Invoked when received Start Stop Unit command
+// - Start = 0 : stopped power mode, if load_eject = 1 : unload disk storage
+// - Start = 1 : active mode, if load_eject = 1 : load disk storage
+typedef bool (*msc_start_stop_cb)(uint8_t power_condition, bool start, bool load_eject);
+
+// Copy disk's data to buffer (up to bufsize) and return number of copied bytes.
+typedef int32_t (*msc_read_cb)(uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize);
+
+// Process data in buffer to disk's storage and return number of written bytes
+typedef int32_t (*msc_write_cb)(uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize);
+
+class USBMSC
+{
+public:
+    USBMSC();
+    ~USBMSC();
+    bool begin(uint32_t block_count, uint16_t block_size);
+    void end();
+    void vendorID(const char * vid);//max 8 chars
+    void productID(const char * pid);//max 16 chars
+    void productRevision(const char * ver);//max 4 chars
+    void mediaPresent(bool media_present);
+    void onStartStop(msc_start_stop_cb cb);
+    void onRead(msc_read_cb cb);
+    void onWrite(msc_write_cb cb);
+private:
+	uint8_t _lun;
+};
+
+#endif /* CONFIG_TINYUSB_MSC_ENABLED */

cores/esp32/Udp.h

@@ -0,0 +1,93 @@
+/*
+ *  Udp.cpp: Library to send/receive UDP packets.
+ *
+ * NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
+ * 1) UDP does not guarantee the order in which assembled UDP packets are received. This
+ * might not happen often in practice, but in larger network topologies, a UDP
+ * packet can be received out of sequence.
+ * 2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
+ * aware of it. Again, this may not be a concern in practice on small local networks.
+ * For more information, see http://www.cafeaulait.org/course/week12/35.html
+ *
+ * MIT License:
+ * Copyright (c) 2008 Bjoern Hartmann
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * bjoern@cs.stanford.edu 12/30/2008
+ */
+
+#ifndef udp_h
+#define udp_h
+
+#include <Stream.h>
+#include <IPAddress.h>
+
+class UDP: public Stream
+{
+
+public:
+    virtual uint8_t begin(uint16_t) =0;	// initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
+    virtual uint8_t beginMulticast(IPAddress, uint16_t) { return 0; }  // initialize, start listening on specified multicast IP address and port. Returns 1 if successful, 0 on failure
+    virtual void stop() =0;  // Finish with the UDP socket
+
+    // Sending UDP packets
+
+    // Start building up a packet to send to the remote host specific in ip and port
+    // Returns 1 if successful, 0 if there was a problem with the supplied IP address or port
+    virtual int beginPacket(IPAddress ip, uint16_t port) =0;
+    // Start building up a packet to send to the remote host specific in host and port
+    // Returns 1 if successful, 0 if there was a problem resolving the hostname or port
+    virtual int beginPacket(const char *host, uint16_t port) =0;
+    // Finish off this packet and send it
+    // Returns 1 if the packet was sent successfully, 0 if there was an error
+    virtual int endPacket() =0;
+    // Write a single byte into the packet
+    virtual size_t write(uint8_t) =0;
+    // Write size bytes from buffer into the packet
+    virtual size_t write(const uint8_t *buffer, size_t size) =0;
+
+    // Start processing the next available incoming packet
+    // Returns the size of the packet in bytes, or 0 if no packets are available
+    virtual int parsePacket() =0;
+    // Number of bytes remaining in the current packet
+    virtual int available() =0;
+    // Read a single byte from the current packet
+    virtual int read() =0;
+    // Read up to len bytes from the current packet and place them into buffer
+    // Returns the number of bytes read, or 0 if none are available
+    virtual int read(unsigned char* buffer, size_t len) =0;
+    // Read up to len characters from the current packet and place them into buffer
+    // Returns the number of characters read, or 0 if none are available
+    virtual int read(char* buffer, size_t len) =0;
+    // Return the next byte from the current packet without moving on to the next byte
+    virtual int peek() =0;
+    virtual void flush() =0;	// Finish reading the current packet
+
+    // Return the IP address of the host who sent the current incoming packet
+    virtual IPAddress remoteIP() =0;
+    // Return the port of the host who sent the current incoming packet
+    virtual uint16_t remotePort() =0;
+protected:
+    uint8_t* rawIPAddress(IPAddress& addr)
+    {
+        return addr.raw_address();
+    }
+};
+
+#endif

cores/esp32/WCharacter.h

@@ -25,83 +25,83 @@
 #define toascii(__c)  ((__c)&0177)
 
 // WCharacter.h prototypes
-inline bool isAlphaNumeric(int c) __attribute__((always_inline));
-inline bool isAlpha(int c) __attribute__((always_inline));
-inline bool isAscii(int c) __attribute__((always_inline));
-inline bool isWhitespace(int c) __attribute__((always_inline));
-inline bool isControl(int c) __attribute__((always_inline));
-inline bool isDigit(int c) __attribute__((always_inline));
-inline bool isGraph(int c) __attribute__((always_inline));
-inline bool isLowerCase(int c) __attribute__((always_inline));
-inline bool isPrintable(int c) __attribute__((always_inline));
-inline bool isPunct(int c) __attribute__((always_inline));
-inline bool isSpace(int c) __attribute__((always_inline));
-inline bool isUpperCase(int c) __attribute__((always_inline));
-inline bool isHexadecimalDigit(int c) __attribute__((always_inline));
+inline boolean isAlphaNumeric(int c) __attribute__((always_inline));
+inline boolean isAlpha(int c) __attribute__((always_inline));
+inline boolean isAscii(int c) __attribute__((always_inline));
+inline boolean isWhitespace(int c) __attribute__((always_inline));
+inline boolean isControl(int c) __attribute__((always_inline));
+inline boolean isDigit(int c) __attribute__((always_inline));
+inline boolean isGraph(int c) __attribute__((always_inline));
+inline boolean isLowerCase(int c) __attribute__((always_inline));
+inline boolean isPrintable(int c) __attribute__((always_inline));
+inline boolean isPunct(int c) __attribute__((always_inline));
+inline boolean isSpace(int c) __attribute__((always_inline));
+inline boolean isUpperCase(int c) __attribute__((always_inline));
+inline boolean isHexadecimalDigit(int c) __attribute__((always_inline));
 inline int toAscii(int c) __attribute__((always_inline));
 inline int toLowerCase(int c) __attribute__((always_inline));
 inline int toUpperCase(int c) __attribute__((always_inline));
 
 // Checks for an alphanumeric character.
 // It is equivalent to (isalpha(c) || isdigit(c)).
-inline bool isAlphaNumeric(int c)
+inline boolean isAlphaNumeric(int c)
 {
     return (isalnum(c) == 0 ? false : true);
 }
 
 // Checks for an alphabetic character.
 // It is equivalent to (isupper(c) || islower(c)).
-inline bool isAlpha(int c)
+inline boolean isAlpha(int c)
 {
     return (isalpha(c) == 0 ? false : true);
 }
 
 // Checks whether c is a 7-bit unsigned char value
 // that fits into the ASCII character set.
-inline bool isAscii(int c)
+inline boolean isAscii(int c)
 {
     return ( isascii (c) == 0 ? false : true);
 }
 
 // Checks for a blank character, that is, a space or a tab.
-inline bool isWhitespace(int c)
+inline boolean isWhitespace(int c)
 {
     return (isblank(c) == 0 ? false : true);
 }
 
 // Checks for a control character.
-inline bool isControl(int c)
+inline boolean isControl(int c)
 {
     return (iscntrl(c) == 0 ? false : true);
 }
 
 // Checks for a digit (0 through 9).
-inline bool isDigit(int c)
+inline boolean isDigit(int c)
 {
     return (isdigit(c) == 0 ? false : true);
 }
 
 // Checks for any printable character except space.
-inline bool isGraph(int c)
+inline boolean isGraph(int c)
 {
     return (isgraph(c) == 0 ? false : true);
 }
 
 // Checks for a lower-case character.
-inline bool isLowerCase(int c)
+inline boolean isLowerCase(int c)
 {
     return (islower(c) == 0 ? false : true);
 }
 
 // Checks for any printable character including space.
-inline bool isPrintable(int c)
+inline boolean isPrintable(int c)
 {
     return (isprint(c) == 0 ? false : true);
 }
 
 // Checks for any printable character which is not a space
 // or an alphanumeric character.
-inline bool isPunct(int c)
+inline boolean isPunct(int c)
 {
     return (ispunct(c) == 0 ? false : true);
 }
@@ -109,20 +109,20 @@ inline bool isPunct(int c)
 // Checks for white-space characters. For the avr-libc library,
 // these are: space, formfeed ('\f'), newline ('\n'), carriage
 // return ('\r'), horizontal tab ('\t'), and vertical tab ('\v').
-inline bool isSpace(int c)
+inline boolean isSpace(int c)
 {
     return (isspace(c) == 0 ? false : true);
 }
 
 // Checks for an uppercase letter.
-inline bool isUpperCase(int c)
+inline boolean isUpperCase(int c)
 {
     return (isupper(c) == 0 ? false : true);
 }
 
 // Checks for a hexadecimal digits, i.e. one of 0 1 2 3 4 5 6 7
 // 8 9 a b c d e f A B C D E F.
-inline bool isHexadecimalDigit(int c)
+inline boolean isHexadecimalDigit(int c)
 {
     return (isxdigit(c) == 0 ? false : true);
 }

cores/esp32/WMath.cpp

@@ -24,23 +24,65 @@
  */
 
 extern "C" {
+#include <stdlib.h>
 #include "esp_system.h"
 }
+#include "esp32-hal-log.h"
 
-//long map(long x, long in_min, long in_max, long out_min, long out_max) {
-//    const long dividend = out_max - out_min;
-//    const long divisor = in_max - in_min;
-//    const long delta = x - in_min;
+void randomSeed(unsigned long seed)
+{
+    if(seed != 0) {
+        srand(seed);
+    }
+}
 
-//    return (delta * dividend + (divisor / 2)) / divisor + out_min;
-//}
+long random(long howbig)
+{
+    uint32_t x = esp_random();
+    uint64_t m = uint64_t(x) * uint64_t(howbig);
+    uint32_t l = uint32_t(m);
+    if (l < howbig) {
+        uint32_t t = -howbig;
+        if (t >= howbig) {
+            t -= howbig;
+            if (t >= howbig)
+                t %= howbig;
+        }
+        while (l < t) {
+            x = esp_random();
+            m = uint64_t(x) * uint64_t(howbig);
+            l = uint32_t(m);
+        }
+    }
+    return m >> 32;
+}
 
-//unsigned int makeWord(unsigned int w)
-//{
-//    return w;
-//}
+long random(long howsmall, long howbig)
+{
+    if(howsmall >= howbig) {
+        return howsmall;
+    }
+    long diff = howbig - howsmall;
+    return random(diff) + howsmall;
+}
 
-//unsigned int makeWord(unsigned char h, unsigned char l)
-//{
-//    return (h << 8) | l;
-//}
+long map(long x, long in_min, long in_max, long out_min, long out_max) {
+    const long dividend = out_max - out_min;
+    const long divisor = in_max - in_min;
+    const long delta = x - in_min;
+    if(divisor == 0){
+        log_e("Invalid map input range, min == max");
+        return -1; //AVR returns -1, SAM returns 0
+    }
+    return (delta * dividend + (divisor / 2)) / divisor + out_min;
+}
+
+uint16_t makeWord(uint16_t w)
+{
+    return w;
+}
+
+uint16_t makeWord(uint8_t h, uint8_t l)
+{
+    return (h << 8) | l;
+}

cores/esp32/WString.cpp

@@ -0,0 +1,860 @@
+/*
+ WString.cpp - String library for Wiring & Arduino
+ ...mostly rewritten by Paul Stoffregen...
+ Copyright (c) 2009-10 Hernando Barragan.  All rights reserved.
+ Copyright 2011, Paul Stoffregen, paul@pjrc.com
+ Modified by Ivan Grokhotkov, 2014 - esp8266 support
+ Modified by Michael C. Miller, 2015 - esp8266 progmem support
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <Arduino.h>
+#include "WString.h"
+#include "stdlib_noniso.h"
+
+/*********************************************/
+/*  Constructors                             */
+/*********************************************/
+
+String::String(const char *cstr) {
+    init();
+    if (cstr)
+        copy(cstr, strlen(cstr));
+}
+
+String::String(const char *cstr, unsigned int length) {
+    init();
+    if (cstr)
+        copy(cstr, length);
+}
+
+String::String(const String &value) {
+    init();
+    *this = value;
+}
+
+String::String(const __FlashStringHelper *pstr) {
+    init();
+    *this = pstr; // see operator =
+}
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+String::String(String &&rval) {
+    init();
+    move(rval);
+}
+
+String::String(StringSumHelper &&rval) {
+    init();
+    move(rval);
+}
+#endif
+
+String::String(char c) {
+    init();
+    char buf[] = { c, '\0' };
+    *this = buf;
+}
+
+String::String(unsigned char value, unsigned char base) {
+    init();
+    char buf[1 + 8 * sizeof(unsigned char)];
+    utoa(value, buf, base);
+    *this = buf;
+}
+
+String::String(int value, unsigned char base) {
+    init();
+    char buf[2 + 8 * sizeof(int)];
+    if (base == 10) {
+        sprintf(buf, "%d", value);
+    } else {
+        itoa(value, buf, base);
+    }
+    *this = buf;
+}
+
+String::String(unsigned int value, unsigned char base) {
+    init();
+    char buf[1 + 8 * sizeof(unsigned int)];
+    utoa(value, buf, base);
+    *this = buf;
+}
+
+String::String(long value, unsigned char base) {
+    init();
+    char buf[2 + 8 * sizeof(long)];
+    if (base==10) {
+        sprintf(buf, "%ld", value);
+    } else {
+        ltoa(value, buf, base);
+    }
+    *this = buf;
+}
+
+String::String(unsigned long value, unsigned char base) {
+    init();
+    char buf[1 + 8 * sizeof(unsigned long)];
+    ultoa(value, buf, base);
+    *this = buf;
+}
+
+String::String(float value, unsigned char decimalPlaces) {
+    init();
+    char buf[33];
+    *this = dtostrf(value, (decimalPlaces + 2), decimalPlaces, buf);
+}
+
+String::String(double value, unsigned char decimalPlaces) {
+    init();
+    char buf[33];
+    *this = dtostrf(value, (decimalPlaces + 2), decimalPlaces, buf);
+}
+
+String::~String() {
+    invalidate();
+}
+
+// /*********************************************/
+// /*  Memory Management                        */
+// /*********************************************/
+
+inline void String::init(void) {
+    setSSO(false);
+    setBuffer(nullptr);
+    setCapacity(0);
+    setLen(0);
+}
+
+void String::invalidate(void) {
+    if(!isSSO() && wbuffer())
+        free(wbuffer());
+    init();
+}
+
+unsigned char String::reserve(unsigned int size) {
+    if(buffer() && capacity() >= size)
+        return 1;
+    if(changeBuffer(size)) {
+        if(len() == 0)
+            wbuffer()[0] = 0;
+        return 1;
+    }
+    return 0;
+}
+
+unsigned char String::changeBuffer(unsigned int maxStrLen) {
+    // Can we use SSO here to avoid allocation?
+    if (maxStrLen < sizeof(sso.buff) - 1) {
+        if (isSSO() || !buffer()) {
+            // Already using SSO, nothing to do
+	    uint16_t oldLen = len();
+            setSSO(true);
+            setLen(oldLen);
+            return 1;
+        } else { // if bufptr && !isSSO()
+            // Using bufptr, need to shrink into sso.buff
+            char temp[sizeof(sso.buff)];
+            memcpy(temp, buffer(), maxStrLen);
+            free(wbuffer());
+            uint16_t oldLen = len();
+            setSSO(true);
+            memcpy(wbuffer(), temp, maxStrLen);
+            setLen(oldLen);
+            return 1;
+        }
+    }
+    // Fallthrough to normal allocator
+    size_t newSize = (maxStrLen + 16) & (~0xf);
+    // Make sure we can fit newsize in the buffer
+    if (newSize > CAPACITY_MAX) {
+        return false;
+    }
+    uint16_t oldLen = len();
+    char *newbuffer = (char *) realloc(isSSO() ? nullptr : wbuffer(), newSize);
+    if (newbuffer) {
+        size_t oldSize = capacity() + 1; // include NULL.
+        if (isSSO()) {
+            // Copy the SSO buffer into allocated space
+            memmove(newbuffer, sso.buff, sizeof(sso.buff));
+        }
+        if (newSize > oldSize)
+        {
+            memset(newbuffer + oldSize, 0, newSize - oldSize);
+        }
+        setSSO(false);
+        setCapacity(newSize - 1);
+        setBuffer(newbuffer);
+        setLen(oldLen); // Needed in case of SSO where len() never existed
+        return 1;
+    }
+    return 0;
+}
+
+// /*********************************************/
+// /*  Copy and Move                            */
+// /*********************************************/
+
+String & String::copy(const char *cstr, unsigned int length) {
+    if(!reserve(length)) {
+        invalidate();
+        return *this;
+    }
+    memmove(wbuffer(), cstr, length + 1);
+    setLen(length);
+    return *this;
+}
+
+String & String::copy(const __FlashStringHelper *pstr, unsigned int length) {
+    if (!reserve(length)) {
+        invalidate();
+        return *this;
+    }
+    memcpy_P(wbuffer(), (PGM_P)pstr, length + 1); // We know wbuffer() cannot ever be in PROGMEM, so memcpy safe here
+    setLen(length);
+    return *this;
+}
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+void String::move(String &rhs) {
+    if(buffer()) {
+        if(capacity() >= rhs.len()) {
+            memmove(wbuffer(), rhs.buffer(), rhs.length() + 1);
+            setLen(rhs.len());
+	    rhs.invalidate();
+            return;
+        } else {
+            if (!isSSO()) {
+                free(wbuffer());
+                setBuffer(nullptr);
+            }
+        }
+    }
+    if (rhs.isSSO()) {
+        setSSO(true);
+        memmove(sso.buff, rhs.sso.buff, sizeof(sso.buff));
+    } else {
+        setSSO(false);
+        setBuffer(rhs.wbuffer());
+    }
+    setCapacity(rhs.capacity());
+    setLen(rhs.len());
+    rhs.setSSO(false);
+    rhs.setCapacity(0);
+    rhs.setBuffer(nullptr);
+    rhs.setLen(0);
+}
+#endif
+
+String & String::operator =(const String &rhs) {
+    if(this == &rhs)
+        return *this;
+
+    if(rhs.buffer())
+        copy(rhs.buffer(), rhs.len());
+    else
+        invalidate();
+
+    return *this;
+}
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+String & String::operator =(String &&rval) {
+    if(this != &rval)
+        move(rval);
+    return *this;
+}
+
+String & String::operator =(StringSumHelper &&rval) {
+    if(this != &rval)
+        move(rval);
+    return *this;
+}
+#endif
+
+String & String::operator =(const char *cstr) {
+    if(cstr)
+        copy(cstr, strlen(cstr));
+    else
+        invalidate();
+
+    return *this;
+}
+
+String & String::operator =(const __FlashStringHelper *pstr) {
+    if(pstr)
+        copy(pstr, strlen_P((PGM_P)pstr));
+    else
+        invalidate();
+
+    return *this;
+}
+
+// /*********************************************/
+// /*  concat                                   */
+// /*********************************************/
+
+unsigned char String::concat(const String &s) {
+    // Special case if we're concatting ourself (s += s;) since we may end up
+    // realloc'ing the buffer and moving s.buffer in the method called
+    if (&s == this) {
+        unsigned int newlen = 2 * len();
+        if (!s.buffer())
+            return 0;
+        if (s.len() == 0)
+            return 1;
+        if (!reserve(newlen))
+            return 0;
+        memmove(wbuffer() + len(), buffer(), len());
+        setLen(newlen);
+        wbuffer()[len()] = 0;
+        return 1;
+    } else {
+        return concat(s.buffer(), s.len());
+    }
+}
+
+unsigned char String::concat(const char *cstr, unsigned int length) {
+    unsigned int newlen = len() + length;
+    if(!cstr)
+        return 0;
+    if(length == 0)
+        return 1;
+    if(!reserve(newlen))
+        return 0;
+    if (cstr >= wbuffer() && cstr < wbuffer() + len())
+        // compatible with SSO in ram #6155 (case "x += x.c_str()")
+        memmove(wbuffer() + len(), cstr, length + 1);
+    else
+        // compatible with source in flash #6367
+        memcpy_P(wbuffer() + len(), cstr, length + 1);
+    setLen(newlen);
+    return 1;
+}
+
+unsigned char String::concat(const char *cstr) {
+    if(!cstr)
+        return 0;
+    return concat(cstr, strlen(cstr));
+}
+
+unsigned char String::concat(char c) {
+    char buf[] = { c, '\0' };
+    return concat(buf, 1);
+}
+
+unsigned char String::concat(unsigned char num) {
+    char buf[1 + 3 * sizeof(unsigned char)];
+    return concat(buf, sprintf(buf, "%d", num));
+}
+
+unsigned char String::concat(int num) {
+    char buf[2 + 3 * sizeof(int)];
+    return concat(buf, sprintf(buf, "%d", num));
+}
+
+unsigned char String::concat(unsigned int num) {
+    char buf[1 + 3 * sizeof(unsigned int)];
+    utoa(num, buf, 10);
+    return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(long num) {
+    char buf[2 + 3 * sizeof(long)];
+    return concat(buf, sprintf(buf, "%ld", num));
+}
+
+unsigned char String::concat(unsigned long num) {
+    char buf[1 + 3 * sizeof(unsigned long)];
+    ultoa(num, buf, 10);
+    return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(float num) {
+    char buf[20];
+    char* string = dtostrf(num, 4, 2, buf);
+    return concat(string, strlen(string));
+}
+
+unsigned char String::concat(double num) {
+    char buf[20];
+    char* string = dtostrf(num, 4, 2, buf);
+    return concat(string, strlen(string));
+}
+
+unsigned char String::concat(const __FlashStringHelper * str) {
+    if (!str) return 0;
+    int length = strlen_P((PGM_P)str);
+    if (length == 0) return 1;
+    unsigned int newlen = len() + length;
+    if (!reserve(newlen)) return 0;
+    memcpy_P(wbuffer() + len(), (PGM_P)str, length + 1);
+    setLen(newlen);
+    return 1;
+}
+
+/*********************************************/
+/*  Concatenate                              */
+/*********************************************/
+
+StringSumHelper & operator +(const StringSumHelper &lhs, const String &rhs) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(rhs.buffer(), rhs.len()))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!cstr || !a.concat(cstr, strlen(cstr)))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, char c) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(c))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, int num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, unsigned int num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, long num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, unsigned long num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, float num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator +(const StringSumHelper &lhs, double num) {
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if(!a.concat(num))
+        a.invalidate();
+    return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, const __FlashStringHelper *rhs)
+{
+    StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+    if (!a.concat(rhs))
+        a.invalidate();
+    return a;
+}
+
+// /*********************************************/
+// /*  Comparison                               */
+// /*********************************************/
+
+int String::compareTo(const String &s) const {
+    if(!buffer() || !s.buffer()) {
+        if(s.buffer() && s.len() > 0)
+            return 0 - *(unsigned char *) s.buffer();
+        if(buffer() && len() > 0)
+            return *(unsigned char *) buffer();
+        return 0;
+    }
+    return strcmp(buffer(), s.buffer());
+}
+
+unsigned char String::equals(const String &s2) const {
+    return (len() == s2.len() && compareTo(s2) == 0);
+}
+
+unsigned char String::equals(const char *cstr) const {
+    if(len() == 0)
+        return (cstr == NULL || *cstr == 0);
+    if(cstr == NULL)
+        return buffer()[0] == 0;
+    return strcmp(buffer(), cstr) == 0;
+}
+
+unsigned char String::operator<(const String &rhs) const {
+    return compareTo(rhs) < 0;
+}
+
+unsigned char String::operator>(const String &rhs) const {
+    return compareTo(rhs) > 0;
+}
+
+unsigned char String::operator<=(const String &rhs) const {
+    return compareTo(rhs) <= 0;
+}
+
+unsigned char String::operator>=(const String &rhs) const {
+    return compareTo(rhs) >= 0;
+}
+
+unsigned char String::equalsIgnoreCase(const String &s2) const {
+    if(this == &s2)
+        return 1;
+    if(len() != s2.len())
+        return 0;
+    if(len() == 0)
+        return 1;
+    const char *p1 = buffer();
+    const char *p2 = s2.buffer();
+    while(*p1) {
+        if(tolower(*p1++) != tolower(*p2++))
+            return 0;
+    }
+    return 1;
+}
+
+unsigned char String::equalsConstantTime(const String &s2) const {
+    // To avoid possible time-based attacks present function
+    // compares given strings in a constant time.
+    if(len() != s2.len())
+        return 0;
+    //at this point lengths are the same
+    if(len() == 0)
+        return 1;
+    //at this point lengths are the same and non-zero
+    const char *p1 = buffer();
+    const char *p2 = s2.buffer();
+    unsigned int equalchars = 0;
+    unsigned int diffchars = 0;
+    while(*p1) {
+        if(*p1 == *p2)
+            ++equalchars;
+        else
+            ++diffchars;
+        ++p1;
+        ++p2;
+    }
+    //the following should force a constant time eval of the condition without a compiler "logical shortcut"
+    unsigned char equalcond = (equalchars == len());
+    unsigned char diffcond = (diffchars == 0);
+    return (equalcond & diffcond); //bitwise AND
+}
+
+unsigned char String::startsWith(const String &s2) const {
+    if(len() < s2.len())
+        return 0;
+    return startsWith(s2, 0);
+}
+
+unsigned char String::startsWith(const String &s2, unsigned int offset) const {
+    if(offset > (unsigned)(len() - s2.len()) || !buffer() || !s2.buffer())
+        return 0;
+    return strncmp(&buffer()[offset], s2.buffer(), s2.len()) == 0;
+}
+
+unsigned char String::endsWith(const String &s2) const {
+    if(len() < s2.len() || !buffer() || !s2.buffer())
+        return 0;
+    return strcmp(&buffer()[len() - s2.len()], s2.buffer()) == 0;
+}
+
+// /*********************************************/
+// /*  Character Access                         */
+// /*********************************************/
+
+char String::charAt(unsigned int loc) const {
+    return operator[](loc);
+}
+
+void String::setCharAt(unsigned int loc, char c) {
+    if(loc < len())
+        wbuffer()[loc] = c;
+}
+
+char & String::operator[](unsigned int index) {
+    static char dummy_writable_char;
+    if(index >= len() || !buffer()) {
+        dummy_writable_char = 0;
+        return dummy_writable_char;
+    }
+    return wbuffer()[index];
+}
+
+char String::operator[](unsigned int index) const {
+    if(index >= len() || !buffer())
+        return 0;
+    return buffer()[index];
+}
+
+void String::getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index) const {
+    if(!bufsize || !buf)
+        return;
+    if(index >= len()) {
+        buf[0] = 0;
+        return;
+    }
+    unsigned int n = bufsize - 1;
+    if(n > len() - index)
+        n = len() - index;
+    strncpy((char *) buf, buffer() + index, n);
+    buf[n] = 0;
+}
+
+// /*********************************************/
+// /*  Search                                   */
+// /*********************************************/
+
+int String::indexOf(char c) const {
+    return indexOf(c, 0);
+}
+
+int String::indexOf(char ch, unsigned int fromIndex) const {
+    if(fromIndex >= len())
+        return -1;
+    const char* temp = strchr(buffer() + fromIndex, ch);
+    if(temp == NULL)
+        return -1;
+    return temp - buffer();
+}
+
+int String::indexOf(const String &s2) const {
+    return indexOf(s2, 0);
+}
+
+int String::indexOf(const String &s2, unsigned int fromIndex) const {
+    if(fromIndex >= len())
+        return -1;
+    const char *found = strstr(buffer() + fromIndex, s2.buffer());
+    if(found == NULL)
+        return -1;
+    return found - buffer();
+}
+
+int String::lastIndexOf(char theChar) const {
+    return lastIndexOf(theChar, len() - 1);
+}
+
+int String::lastIndexOf(char ch, unsigned int fromIndex) const {
+    if(fromIndex >= len())
+        return -1;
+    char tempchar = buffer()[fromIndex + 1];
+    wbuffer()[fromIndex + 1] = '\0';
+    char* temp = strrchr(wbuffer(), ch);
+    wbuffer()[fromIndex + 1] = tempchar;
+    if(temp == NULL)
+        return -1;
+    return temp - buffer();
+}
+
+int String::lastIndexOf(const String &s2) const {
+    return lastIndexOf(s2, len() - s2.len());
+}
+
+int String::lastIndexOf(const String &s2, unsigned int fromIndex) const {
+    if(s2.len() == 0 || len() == 0 || s2.len() > len())
+        return -1;
+    if(fromIndex >= len())
+        fromIndex = len() - 1;
+    int found = -1;
+    for(char *p = wbuffer(); p <= wbuffer() + fromIndex; p++) {
+        p = strstr(p, s2.buffer());
+        if(!p)
+            break;
+        if((unsigned int) (p - wbuffer()) <= fromIndex)
+            found = p - buffer();
+    }
+    return found;
+}
+
+String String::substring(unsigned int left, unsigned int right) const {
+    if(left > right) {
+        unsigned int temp = right;
+        right = left;
+        left = temp;
+    }
+    String out;
+    if(left >= len())
+        return out;
+    if(right > len())
+        right = len();
+    out.copy(buffer() + left, right - left);
+    return out;
+}
+
+// /*********************************************/
+// /*  Modification                             */
+// /*********************************************/
+
+void String::replace(char find, char replace) {
+    if(!buffer())
+        return;
+    for(char *p = wbuffer(); *p; p++) {
+        if(*p == find)
+            *p = replace;
+    }
+}
+
+void String::replace(const String& find, const String& replace) {
+    if(len() == 0 || find.len() == 0)
+        return;
+    int diff = replace.len() - find.len();
+    char *readFrom = wbuffer();
+    char *foundAt;
+    if(diff == 0) {
+        while((foundAt = strstr(readFrom, find.buffer())) != NULL) {
+            memmove(foundAt, replace.buffer(), replace.len());
+            readFrom = foundAt + replace.len();
+        }
+    } else if(diff < 0) {
+        char *writeTo = wbuffer();
+        unsigned int l = len();
+        while((foundAt = strstr(readFrom, find.buffer())) != NULL) {
+            unsigned int n = foundAt - readFrom;
+            memmove(writeTo, readFrom, n);
+            writeTo += n;
+            memmove(writeTo, replace.buffer(), replace.len());
+            writeTo += replace.len();
+            readFrom = foundAt + find.len();
+            l += diff;
+        }
+        memmove(writeTo, readFrom, strlen(readFrom)+1);
+        setLen(l);
+    } else {
+        unsigned int size = len(); // compute size needed for result
+        while((foundAt = strstr(readFrom, find.buffer())) != NULL) {
+            readFrom = foundAt + find.len();
+            size += diff;
+        }
+        if(size == len())
+            return;
+        if(size > capacity() && !changeBuffer(size))
+            return; // XXX: tell user!
+        int index = len() - 1;
+        while(index >= 0 && (index = lastIndexOf(find, index)) >= 0) {
+            readFrom = wbuffer() + index + find.len();
+            memmove(readFrom + diff, readFrom, len() - (readFrom - buffer()));
+            int newLen = len() + diff;
+            memmove(wbuffer() + index, replace.buffer(), replace.len());
+            setLen(newLen);
+            wbuffer()[newLen] = 0;
+            index--;
+        }
+    }
+}
+
+void String::remove(unsigned int index) {
+    // Pass the biggest integer as the count. The remove method
+    // below will take care of truncating it at the end of the
+    // string.
+    remove(index, (unsigned int) -1);
+}
+
+void String::remove(unsigned int index, unsigned int count) {
+    if(index >= len()) {
+        return;
+    }
+    if(count <= 0) {
+        return;
+    }
+    if(count > len() - index) {
+        count = len() - index;
+    }
+    char *writeTo = wbuffer() + index;
+    unsigned int newlen = len() - count;
+    memmove(writeTo, wbuffer() + index + count, newlen - index);
+    setLen(newlen);
+    wbuffer()[newlen] = 0;
+}
+
+void String::toLowerCase(void) {
+    if(!buffer())
+        return;
+    for(char *p = wbuffer(); *p; p++) {
+        *p = tolower(*p);
+    }
+}
+
+void String::toUpperCase(void) {
+    if(!buffer())
+        return;
+    for(char *p = wbuffer(); *p; p++) {
+        *p = toupper(*p);
+    }
+}
+
+void String::trim(void) {
+    if(!buffer() || len() == 0)
+        return;
+    char *begin = wbuffer();
+    while(isspace(*begin))
+        begin++;
+    char *end = wbuffer() + len() - 1;
+    while(isspace(*end) && end >= begin)
+        end--;
+    unsigned int newlen = end + 1 - begin;
+    if(begin > buffer())
+        memmove(wbuffer(), begin, newlen);
+    setLen(newlen);
+    wbuffer()[newlen] = 0;
+}
+
+// /*********************************************/
+// /*  Parsing / Conversion                     */
+// /*********************************************/
+
+long String::toInt(void) const {
+    if (buffer())
+        return atol(buffer());
+    return 0;
+}
+
+float String::toFloat(void) const {
+    if (buffer())
+        return atof(buffer());
+    return 0;
+}
+
+double String::toDouble(void) const
+{
+    if (buffer())
+        return atof(buffer());
+    return 0.0;
+}
+
+// global empty string to allow returning const String& with nothing
+
+const String emptyString;

cores/esp32/WString.h

@@ -0,0 +1,381 @@
+/*
+ WString.h - String library for Wiring & Arduino
+ ...mostly rewritten by Paul Stoffregen...
+ Copyright (c) 2009-10 Hernando Barragan.  All right reserved.
+ Copyright 2011, Paul Stoffregen, paul@pjrc.com
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef String_class_h
+#define String_class_h
+#ifdef __cplusplus
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <pgmspace.h>
+#include <stdint.h>
+
+// An inherited class for holding the result of a concatenation.  These
+// result objects are assumed to be writable by subsequent concatenations.
+class StringSumHelper;
+
+// an abstract class used as a means to proide a unique pointer type
+// but really has no body
+class __FlashStringHelper;
+#define FPSTR(pstr_pointer) (reinterpret_cast<const __FlashStringHelper *>(pstr_pointer))
+#define F(string_literal) (FPSTR(PSTR(string_literal)))
+
+// The string class
+class String {
+        // use a function pointer to allow for "if (s)" without the
+        // complications of an operator bool(). for more information, see:
+        // http://www.artima.com/cppsource/safebool.html
+        typedef void (String::*StringIfHelperType)() const;
+        void StringIfHelper() const {
+        }
+
+    public:
+        // constructors
+        // creates a copy of the initial value.
+        // if the initial value is null or invalid, or if memory allocation
+        // fails, the string will be marked as invalid (i.e. "if (s)" will
+        // be false).
+        String(const char *cstr = "");
+        String(const char *cstr, unsigned int length);
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+        String(const uint8_t *cstr, unsigned int length) : String((const char*)cstr, length) {}
+#endif
+        String(const String &str);
+        String(const __FlashStringHelper *str);
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+        String(String &&rval);
+        String(StringSumHelper &&rval);
+#endif
+        explicit String(char c);
+        explicit String(unsigned char, unsigned char base = 10);
+        explicit String(int, unsigned char base = 10);
+        explicit String(unsigned int, unsigned char base = 10);
+        explicit String(long, unsigned char base = 10);
+        explicit String(unsigned long, unsigned char base = 10);
+        explicit String(float, unsigned char decimalPlaces = 2);
+        explicit String(double, unsigned char decimalPlaces = 2);
+        ~String(void);
+
+        // memory management
+        // return true on success, false on failure (in which case, the string
+        // is left unchanged).  reserve(0), if successful, will validate an
+        // invalid string (i.e., "if (s)" will be true afterwards)
+        unsigned char reserve(unsigned int size);
+        inline unsigned int length(void) const {
+            if(buffer()) {
+                return len();
+            } else {
+                return 0;
+            }
+        }
+        inline void clear(void) {
+            setLen(0);
+        }
+        inline bool isEmpty(void) const {
+            return length() == 0;
+        }
+
+        // creates a copy of the assigned value.  if the value is null or
+        // invalid, or if the memory allocation fails, the string will be
+        // marked as invalid ("if (s)" will be false).
+        String & operator =(const String &rhs);
+        String & operator =(const char *cstr);
+        String & operator = (const __FlashStringHelper *str);
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+        String & operator =(String &&rval);
+        String & operator =(StringSumHelper &&rval);
+#endif
+
+        // concatenate (works w/ built-in types)
+
+        // returns true on success, false on failure (in which case, the string
+        // is left unchanged).  if the argument is null or invalid, the
+        // concatenation is considered unsuccessful.
+        unsigned char concat(const String &str);
+        unsigned char concat(const char *cstr);
+        unsigned char concat(const char *cstr, unsigned int length);
+        unsigned char concat(const uint8_t *cstr, unsigned int length) {return concat((const char*)cstr, length);}
+        unsigned char concat(char c);
+        unsigned char concat(unsigned char c);
+        unsigned char concat(int num);
+        unsigned char concat(unsigned int num);
+        unsigned char concat(long num);
+        unsigned char concat(unsigned long num);
+        unsigned char concat(float num);
+        unsigned char concat(double num);
+        unsigned char concat(const __FlashStringHelper * str);
+
+        // if there's not enough memory for the concatenated value, the string
+        // will be left unchanged (but this isn't signalled in any way)
+        String & operator +=(const String &rhs) {
+            concat(rhs);
+            return (*this);
+        }
+        String & operator +=(const char *cstr) {
+            concat(cstr);
+            return (*this);
+        }
+        String & operator +=(char c) {
+            concat(c);
+            return (*this);
+        }
+        String & operator +=(unsigned char num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(int num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(unsigned int num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(long num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(unsigned long num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(float num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(double num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator += (const __FlashStringHelper *str){
+            concat(str);
+            return (*this);
+        }
+
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const String &rhs);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, char c);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, int num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned int num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, long num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned long num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, float num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, double num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
+
+        // comparison (only works w/ Strings and "strings")
+        operator StringIfHelperType() const {
+            return buffer() ? &String::StringIfHelper : 0;
+        }
+        int compareTo(const String &s) const;
+        unsigned char equals(const String &s) const;
+        unsigned char equals(const char *cstr) const;
+        unsigned char operator ==(const String &rhs) const {
+            return equals(rhs);
+        }
+        unsigned char operator ==(const char *cstr) const {
+            return equals(cstr);
+        }
+        unsigned char operator !=(const String &rhs) const {
+            return !equals(rhs);
+        }
+        unsigned char operator !=(const char *cstr) const {
+            return !equals(cstr);
+        }
+        unsigned char operator <(const String &rhs) const;
+        unsigned char operator >(const String &rhs) const;
+        unsigned char operator <=(const String &rhs) const;
+        unsigned char operator >=(const String &rhs) const;
+        unsigned char equalsIgnoreCase(const String &s) const;
+        unsigned char equalsConstantTime(const String &s) const;
+        unsigned char startsWith(const String &prefix) const;
+        unsigned char startsWith(const char *prefix) const {
+            return this->startsWith(String(prefix));
+        }
+        unsigned char startsWith(const __FlashStringHelper *prefix) const {
+            return this->startsWith(String(prefix));
+        }
+        unsigned char startsWith(const String &prefix, unsigned int offset) const;
+        unsigned char endsWith(const String &suffix) const;
+        unsigned char endsWith(const char *suffix) const {
+            return this->endsWith(String(suffix));
+        }
+        unsigned char endsWith(const __FlashStringHelper * suffix) const {
+            return this->endsWith(String(suffix));
+        }
+
+        // character access
+        char charAt(unsigned int index) const;
+        void setCharAt(unsigned int index, char c);
+        char operator [](unsigned int index) const;
+        char& operator [](unsigned int index);
+        void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index = 0) const;
+        void toCharArray(char *buf, unsigned int bufsize, unsigned int index = 0) const {
+            getBytes((unsigned char *) buf, bufsize, index);
+        }
+        const char* c_str() const { return buffer(); }
+        char* begin() { return wbuffer(); }
+        char* end() { return wbuffer() + length(); }
+        const char* begin() const { return c_str(); }
+        const char* end() const { return c_str() + length(); }
+
+        // search
+        int indexOf(char ch) const;
+        int indexOf(char ch, unsigned int fromIndex) const;
+        int indexOf(const String &str) const;
+        int indexOf(const String &str, unsigned int fromIndex) const;
+        int lastIndexOf(char ch) const;
+        int lastIndexOf(char ch, unsigned int fromIndex) const;
+        int lastIndexOf(const String &str) const;
+        int lastIndexOf(const String &str, unsigned int fromIndex) const;
+        String substring(unsigned int beginIndex) const {
+            return substring(beginIndex, len());
+        }
+        ;
+        String substring(unsigned int beginIndex, unsigned int endIndex) const;
+
+        // modification
+        void replace(char find, char replace);
+        void replace(const String &find, const String &replace);
+        void replace(const char *find, const String &replace) {
+            this->replace(String(find), replace);
+        }
+        void replace(const __FlashStringHelper *find, const String &replace) {
+            this->replace(String(find), replace);
+        }
+        void replace(const char *find, const char *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void replace(const __FlashStringHelper *find, const char *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void replace(const __FlashStringHelper *find, const __FlashStringHelper *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void remove(unsigned int index);
+        void remove(unsigned int index, unsigned int count);
+        void toLowerCase(void);
+        void toUpperCase(void);
+        void trim(void);
+
+        // parsing/conversion
+        long toInt(void) const;
+        float toFloat(void) const;
+	double toDouble(void) const;
+
+    protected:
+        // Contains the string info when we're not in SSO mode
+        struct _ptr { 
+            char *   buff;
+            uint32_t cap;
+            uint32_t len;
+        };
+        // This allows strings up up to 11 (10 + \0 termination) without any extra space.
+        enum { SSOSIZE = sizeof(struct _ptr) + 4 - 1 }; // Characters to allocate space for SSO, must be 12 or more
+        struct _sso {
+            char     buff[SSOSIZE];
+            unsigned char len   : 7; // Ensure only one byte is allocated by GCC for the bitfields
+            unsigned char isSSO : 1;
+        } __attribute__((packed)); // Ensure that GCC doesn't expand the flag byte to a 32-bit word for alignment issues
+#ifdef BOARD_HAS_PSRAM
+        enum { CAPACITY_MAX = 3145728 }; 
+#else
+        enum { CAPACITY_MAX = 65535 }; 
+#endif
+        union {
+            struct _ptr ptr;
+            struct _sso sso;
+        };
+        // Accessor functions
+        inline bool isSSO() const { return sso.isSSO; }
+        inline unsigned int len() const { return isSSO() ? sso.len : ptr.len; }
+        inline unsigned int capacity() const { return isSSO() ? (unsigned int)SSOSIZE - 1 : ptr.cap; } // Size of max string not including terminal NUL
+        inline void setSSO(bool set) { sso.isSSO = set; }
+        inline void setLen(int len) {
+            if (isSSO()) {
+                sso.len = len;
+                sso.buff[len] = 0;
+            } else {
+                ptr.len = len;
+                if (ptr.buff) {
+                    ptr.buff[len] = 0;
+                }
+            }
+        }
+        inline void setCapacity(int cap) { if (!isSSO()) ptr.cap = cap; }
+        inline void setBuffer(char *buff) { if (!isSSO()) ptr.buff = buff; }
+        // Buffer accessor functions
+        inline const char *buffer() const { return (const char *)(isSSO() ? sso.buff : ptr.buff); }
+        inline char *wbuffer() const { return isSSO() ? const_cast<char *>(sso.buff) : ptr.buff; } // Writable version of buffer
+
+    protected:
+        void init(void);
+        void invalidate(void);
+        unsigned char changeBuffer(unsigned int maxStrLen);
+
+        // copy and move
+        String & copy(const char *cstr, unsigned int length);
+        String & copy(const __FlashStringHelper *pstr, unsigned int length);
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+        void move(String &rhs);
+#endif
+};
+
+class StringSumHelper: public String {
+    public:
+        StringSumHelper(const String &s) :
+                String(s) {
+        }
+        StringSumHelper(const char *p) :
+                String(p) {
+        }
+        StringSumHelper(char c) :
+                String(c) {
+        }
+        StringSumHelper(unsigned char num) :
+                String(num) {
+        }
+        StringSumHelper(int num) :
+                String(num) {
+        }
+        StringSumHelper(unsigned int num) :
+                String(num) {
+        }
+        StringSumHelper(long num) :
+                String(num) {
+        }
+        StringSumHelper(unsigned long num) :
+                String(num) {
+        }
+        StringSumHelper(float num) :
+                String(num) {
+        }
+        StringSumHelper(double num) :
+                String(num) {
+        }
+};
+
+extern const String emptyString;
+
+#endif  // __cplusplus
+#endif  // String_class_h

cores/esp32/apps/sntp/sntp.h

@@ -0,0 +1 @@
+#include "lwip/apps/sntp.h"

cores/esp32/base64.cpp

@@ -0,0 +1,64 @@
+/**
+ * base64.cpp
+ *
+ * Created on: 09.12.2015
+ *
+ * Copyright (c) 2015 Markus Sattler. All rights reserved.
+ * This file is part of the ESP31B core for Arduino.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "Arduino.h"
+extern "C" {
+#include "libb64/cdecode.h"
+#include "libb64/cencode.h"
+}
+#include "base64.h"
+
+/**
+ * convert input data to base64
+ * @param data const uint8_t *
+ * @param length size_t
+ * @return String
+ */
+String base64::encode(const uint8_t * data, size_t length)
+{
+    size_t size = base64_encode_expected_len(length) + 1;
+    char * buffer = (char *) malloc(size);
+    if(buffer) {
+        base64_encodestate _state;
+        base64_init_encodestate(&_state);
+        int len = base64_encode_block((const char *) &data[0], length, &buffer[0], &_state);
+        len = base64_encode_blockend((buffer + len), &_state);
+
+        String base64 = String(buffer);
+        free(buffer);
+        return base64;
+    }
+    return String("-FAIL-");
+}
+
+/**
+ * convert input data to base64
+ * @param text const String&
+ * @return String
+ */
+String base64::encode(const String& text)
+{
+    return base64::encode((uint8_t *) text.c_str(), text.length());
+}
+

cores/esp32/base64.h

@@ -0,0 +1,13 @@
+#ifndef CORE_BASE64_H_
+#define CORE_BASE64_H_
+
+class base64
+{
+public:
+    static String encode(const uint8_t * data, size_t length);
+    static String encode(const String& text);
+private:
+};
+
+
+#endif /* CORE_BASE64_H_ */

cores/esp32/binary.h

@@ -0,0 +1,534 @@
+/*
+ binary.h - Definitions for binary constants
+ Copyright (c) 2006 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef Binary_h
+#define Binary_h
+
+#define B0 0
+#define B00 0
+#define B000 0
+#define B0000 0
+#define B00000 0
+#define B000000 0
+#define B0000000 0
+#define B00000000 0
+#define B1 1
+#define B01 1
+#define B001 1
+#define B0001 1
+#define B00001 1
+#define B000001 1
+#define B0000001 1
+#define B00000001 1
+#define B10 2
+#define B010 2
+#define B0010 2
+#define B00010 2
+#define B000010 2
+#define B0000010 2
+#define B00000010 2
+#define B11 3
+#define B011 3
+#define B0011 3
+#define B00011 3
+#define B000011 3
+#define B0000011 3
+#define B00000011 3
+#define B100 4
+#define B0100 4
+#define B00100 4
+#define B000100 4
+#define B0000100 4
+#define B00000100 4
+#define B101 5
+#define B0101 5
+#define B00101 5
+#define B000101 5
+#define B0000101 5
+#define B00000101 5
+#define B110 6
+#define B0110 6
+#define B00110 6
+#define B000110 6
+#define B0000110 6
+#define B00000110 6
+#define B111 7
+#define B0111 7
+#define B00111 7
+#define B000111 7
+#define B0000111 7
+#define B00000111 7
+#define B1000 8
+#define B01000 8
+#define B001000 8
+#define B0001000 8
+#define B00001000 8
+#define B1001 9
+#define B01001 9
+#define B001001 9
+#define B0001001 9
+#define B00001001 9
+#define B1010 10
+#define B01010 10
+#define B001010 10
+#define B0001010 10
+#define B00001010 10
+#define B1011 11
+#define B01011 11
+#define B001011 11
+#define B0001011 11
+#define B00001011 11
+#define B1100 12
+#define B01100 12
+#define B001100 12
+#define B0001100 12
+#define B00001100 12
+#define B1101 13
+#define B01101 13
+#define B001101 13
+#define B0001101 13
+#define B00001101 13
+#define B1110 14
+#define B01110 14
+#define B001110 14
+#define B0001110 14
+#define B00001110 14
+#define B1111 15
+#define B01111 15
+#define B001111 15
+#define B0001111 15
+#define B00001111 15
+#define B10000 16
+#define B010000 16
+#define B0010000 16
+#define B00010000 16
+#define B10001 17
+#define B010001 17
+#define B0010001 17
+#define B00010001 17
+#define B10010 18
+#define B010010 18
+#define B0010010 18
+#define B00010010 18
+#define B10011 19
+#define B010011 19
+#define B0010011 19
+#define B00010011 19
+#define B10100 20
+#define B010100 20
+#define B0010100 20
+#define B00010100 20
+#define B10101 21
+#define B010101 21
+#define B0010101 21
+#define B00010101 21
+#define B10110 22
+#define B010110 22
+#define B0010110 22
+#define B00010110 22
+#define B10111 23
+#define B010111 23
+#define B0010111 23
+#define B00010111 23
+#define B11000 24
+#define B011000 24
+#define B0011000 24
+#define B00011000 24
+#define B11001 25
+#define B011001 25
+#define B0011001 25
+#define B00011001 25
+#define B11010 26
+#define B011010 26
+#define B0011010 26
+#define B00011010 26
+#define B11011 27
+#define B011011 27
+#define B0011011 27
+#define B00011011 27
+#define B11100 28
+#define B011100 28
+#define B0011100 28
+#define B00011100 28
+#define B11101 29
+#define B011101 29
+#define B0011101 29
+#define B00011101 29
+#define B11110 30
+#define B011110 30
+#define B0011110 30
+#define B00011110 30
+#define B11111 31
+#define B011111 31
+#define B0011111 31
+#define B00011111 31
+#define B100000 32
+#define B0100000 32
+#define B00100000 32
+#define B100001 33
+#define B0100001 33
+#define B00100001 33
+#define B100010 34
+#define B0100010 34
+#define B00100010 34
+#define B100011 35
+#define B0100011 35
+#define B00100011 35
+#define B100100 36
+#define B0100100 36
+#define B00100100 36
+#define B100101 37
+#define B0100101 37
+#define B00100101 37
+#define B100110 38
+#define B0100110 38
+#define B00100110 38
+#define B100111 39
+#define B0100111 39
+#define B00100111 39
+#define B101000 40
+#define B0101000 40
+#define B00101000 40
+#define B101001 41
+#define B0101001 41
+#define B00101001 41
+#define B101010 42
+#define B0101010 42
+#define B00101010 42
+#define B101011 43
+#define B0101011 43
+#define B00101011 43
+#define B101100 44
+#define B0101100 44
+#define B00101100 44
+#define B101101 45
+#define B0101101 45
+#define B00101101 45
+#define B101110 46
+#define B0101110 46
+#define B00101110 46
+#define B101111 47
+#define B0101111 47
+#define B00101111 47
+#define B110000 48
+#define B0110000 48
+#define B00110000 48
+#define B110001 49
+#define B0110001 49
+#define B00110001 49
+#define B110010 50
+#define B0110010 50
+#define B00110010 50
+#define B110011 51
+#define B0110011 51
+#define B00110011 51
+#define B110100 52
+#define B0110100 52
+#define B00110100 52
+#define B110101 53
+#define B0110101 53
+#define B00110101 53
+#define B110110 54
+#define B0110110 54
+#define B00110110 54
+#define B110111 55
+#define B0110111 55
+#define B00110111 55
+#define B111000 56
+#define B0111000 56
+#define B00111000 56
+#define B111001 57
+#define B0111001 57
+#define B00111001 57
+#define B111010 58
+#define B0111010 58
+#define B00111010 58
+#define B111011 59
+#define B0111011 59
+#define B00111011 59
+#define B111100 60
+#define B0111100 60
+#define B00111100 60
+#define B111101 61
+#define B0111101 61
+#define B00111101 61
+#define B111110 62
+#define B0111110 62
+#define B00111110 62
+#define B111111 63
+#define B0111111 63
+#define B00111111 63
+#define B1000000 64
+#define B01000000 64
+#define B1000001 65
+#define B01000001 65
+#define B1000010 66
+#define B01000010 66
+#define B1000011 67
+#define B01000011 67
+#define B1000100 68
+#define B01000100 68
+#define B1000101 69
+#define B01000101 69
+#define B1000110 70
+#define B01000110 70
+#define B1000111 71
+#define B01000111 71
+#define B1001000 72
+#define B01001000 72
+#define B1001001 73
+#define B01001001 73
+#define B1001010 74
+#define B01001010 74
+#define B1001011 75
+#define B01001011 75
+#define B1001100 76
+#define B01001100 76
+#define B1001101 77
+#define B01001101 77
+#define B1001110 78
+#define B01001110 78
+#define B1001111 79
+#define B01001111 79
+#define B1010000 80
+#define B01010000 80
+#define B1010001 81
+#define B01010001 81
+#define B1010010 82
+#define B01010010 82
+#define B1010011 83
+#define B01010011 83
+#define B1010100 84
+#define B01010100 84
+#define B1010101 85
+#define B01010101 85
+#define B1010110 86
+#define B01010110 86
+#define B1010111 87
+#define B01010111 87
+#define B1011000 88
+#define B01011000 88
+#define B1011001 89
+#define B01011001 89
+#define B1011010 90
+#define B01011010 90
+#define B1011011 91
+#define B01011011 91
+#define B1011100 92
+#define B01011100 92
+#define B1011101 93
+#define B01011101 93
+#define B1011110 94
+#define B01011110 94
+#define B1011111 95
+#define B01011111 95
+#define B1100000 96
+#define B01100000 96
+#define B1100001 97
+#define B01100001 97
+#define B1100010 98
+#define B01100010 98
+#define B1100011 99
+#define B01100011 99
+#define B1100100 100
+#define B01100100 100
+#define B1100101 101
+#define B01100101 101
+#define B1100110 102
+#define B01100110 102
+#define B1100111 103
+#define B01100111 103
+#define B1101000 104
+#define B01101000 104
+#define B1101001 105
+#define B01101001 105
+#define B1101010 106
+#define B01101010 106
+#define B1101011 107
+#define B01101011 107
+#define B1101100 108
+#define B01101100 108
+#define B1101101 109
+#define B01101101 109
+#define B1101110 110
+#define B01101110 110
+#define B1101111 111
+#define B01101111 111
+#define B1110000 112
+#define B01110000 112
+#define B1110001 113
+#define B01110001 113
+#define B1110010 114
+#define B01110010 114
+#define B1110011 115
+#define B01110011 115
+#define B1110100 116
+#define B01110100 116
+#define B1110101 117
+#define B01110101 117
+#define B1110110 118
+#define B01110110 118
+#define B1110111 119
+#define B01110111 119
+#define B1111000 120
+#define B01111000 120
+#define B1111001 121
+#define B01111001 121
+#define B1111010 122
+#define B01111010 122
+#define B1111011 123
+#define B01111011 123
+#define B1111100 124
+#define B01111100 124
+#define B1111101 125
+#define B01111101 125
+#define B1111110 126
+#define B01111110 126
+#define B1111111 127
+#define B01111111 127
+#define B10000000 128
+#define B10000001 129
+#define B10000010 130
+#define B10000011 131
+#define B10000100 132
+#define B10000101 133
+#define B10000110 134
+#define B10000111 135
+#define B10001000 136
+#define B10001001 137
+#define B10001010 138
+#define B10001011 139
+#define B10001100 140
+#define B10001101 141
+#define B10001110 142
+#define B10001111 143
+#define B10010000 144
+#define B10010001 145
+#define B10010010 146
+#define B10010011 147
+#define B10010100 148
+#define B10010101 149
+#define B10010110 150
+#define B10010111 151
+#define B10011000 152
+#define B10011001 153
+#define B10011010 154
+#define B10011011 155
+#define B10011100 156
+#define B10011101 157
+#define B10011110 158
+#define B10011111 159
+#define B10100000 160
+#define B10100001 161
+#define B10100010 162
+#define B10100011 163
+#define B10100100 164
+#define B10100101 165
+#define B10100110 166
+#define B10100111 167
+#define B10101000 168
+#define B10101001 169
+#define B10101010 170
+#define B10101011 171
+#define B10101100 172
+#define B10101101 173
+#define B10101110 174
+#define B10101111 175
+#define B10110000 176
+#define B10110001 177
+#define B10110010 178
+#define B10110011 179
+#define B10110100 180
+#define B10110101 181
+#define B10110110 182
+#define B10110111 183
+#define B10111000 184
+#define B10111001 185
+#define B10111010 186
+#define B10111011 187
+#define B10111100 188
+#define B10111101 189
+#define B10111110 190
+#define B10111111 191
+#define B11000000 192
+#define B11000001 193
+#define B11000010 194
+#define B11000011 195
+#define B11000100 196
+#define B11000101 197
+#define B11000110 198
+#define B11000111 199
+#define B11001000 200
+#define B11001001 201
+#define B11001010 202
+#define B11001011 203
+#define B11001100 204
+#define B11001101 205
+#define B11001110 206
+#define B11001111 207
+#define B11010000 208
+#define B11010001 209
+#define B11010010 210
+#define B11010011 211
+#define B11010100 212
+#define B11010101 213
+#define B11010110 214
+#define B11010111 215
+#define B11011000 216
+#define B11011001 217
+#define B11011010 218
+#define B11011011 219
+#define B11011100 220
+#define B11011101 221
+#define B11011110 222
+#define B11011111 223
+#define B11100000 224
+#define B11100001 225
+#define B11100010 226
+#define B11100011 227
+#define B11100100 228
+#define B11100101 229
+#define B11100110 230
+#define B11100111 231
+#define B11101000 232
+#define B11101001 233
+#define B11101010 234
+#define B11101011 235
+#define B11101100 236
+#define B11101101 237
+#define B11101110 238
+#define B11101111 239
+#define B11110000 240
+#define B11110001 241
+#define B11110010 242
+#define B11110011 243
+#define B11110100 244
+#define B11110101 245
+#define B11110110 246
+#define B11110111 247
+#define B11111000 248
+#define B11111001 249
+#define B11111010 250
+#define B11111011 251
+#define B11111100 252
+#define B11111101 253
+#define B11111110 254
+#define B11111111 255
+
+#endif

cores/esp32/cbuf.cpp

@@ -0,0 +1,196 @@
+/*
+ cbuf.cpp - Circular buffer implementation
+ Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
+ This file is part of the esp8266 core for Arduino environment.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "cbuf.h"
+
+cbuf::cbuf(size_t size) :
+    next(NULL), _size(size+1), _buf(new char[size+1]), _bufend(_buf + size + 1), _begin(_buf), _end(_begin)
+{
+}
+
+cbuf::~cbuf()
+{
+    delete[] _buf;
+}
+
+size_t cbuf::resizeAdd(size_t addSize)
+{
+    return resize(_size + addSize);
+}
+
+size_t cbuf::resize(size_t newSize)
+{
+
+    size_t bytes_available = available();
+    newSize += 1;
+    // not lose any data
+    // if data can be lost use remove or flush before resize
+    if((newSize < bytes_available) || (newSize == _size)) {
+        return _size;
+    }
+
+    char *newbuf = new char[newSize];
+    char *oldbuf = _buf;
+
+    if(!newbuf) {
+        return _size;
+    }
+
+    if(_buf) {
+        read(newbuf, bytes_available);
+        memset((newbuf + bytes_available), 0x00, (newSize - bytes_available));
+    }
+
+    _begin = newbuf;
+    _end = newbuf + bytes_available;
+    _bufend = newbuf + newSize;
+    _size = newSize;
+
+    _buf = newbuf;
+    delete[] oldbuf;
+
+    return _size;
+}
+
+size_t cbuf::available() const
+{
+    if(_end >= _begin) {
+        return _end - _begin;
+    }
+    return _size - (_begin - _end);
+}
+
+size_t cbuf::size()
+{
+    return _size;
+}
+
+size_t cbuf::room() const
+{
+    if(_end >= _begin) {
+        return _size - (_end - _begin) - 1;
+    }
+    return _begin - _end - 1;
+}
+
+int cbuf::peek()
+{
+    if(empty()) {
+        return -1;
+    }
+
+    return static_cast<int>(*_begin);
+}
+
+size_t cbuf::peek(char *dst, size_t size)
+{
+    size_t bytes_available = available();
+    size_t size_to_read = (size < bytes_available) ? size : bytes_available;
+    size_t size_read = size_to_read;
+    char * begin = _begin;
+    if(_end < _begin && size_to_read > (size_t) (_bufend - _begin)) {
+        size_t top_size = _bufend - _begin;
+        memcpy(dst, _begin, top_size);
+        begin = _buf;
+        size_to_read -= top_size;
+        dst += top_size;
+    }
+    memcpy(dst, begin, size_to_read);
+    return size_read;
+}
+
+int cbuf::read()
+{
+    if(empty()) {
+        return -1;
+    }
+
+    char result = *_begin;
+    _begin = wrap_if_bufend(_begin + 1);
+    return static_cast<int>(result);
+}
+
+size_t cbuf::read(char* dst, size_t size)
+{
+    size_t bytes_available = available();
+    size_t size_to_read = (size < bytes_available) ? size : bytes_available;
+    size_t size_read = size_to_read;
+    if(_end < _begin && size_to_read > (size_t) (_bufend - _begin)) {
+        size_t top_size = _bufend - _begin;
+        memcpy(dst, _begin, top_size);
+        _begin = _buf;
+        size_to_read -= top_size;
+        dst += top_size;
+    }
+    memcpy(dst, _begin, size_to_read);
+    _begin = wrap_if_bufend(_begin + size_to_read);
+    return size_read;
+}
+
+size_t cbuf::write(char c)
+{
+    if(full()) {
+        return 0;
+    }
+
+    *_end = c;
+    _end = wrap_if_bufend(_end + 1);
+    return 1;
+}
+
+size_t cbuf::write(const char* src, size_t size)
+{
+    size_t bytes_available = room();
+    size_t size_to_write = (size < bytes_available) ? size : bytes_available;
+    size_t size_written = size_to_write;
+    if(_end >= _begin && size_to_write > (size_t) (_bufend - _end)) {
+        size_t top_size = _bufend - _end;
+        memcpy(_end, src, top_size);
+        _end = _buf;
+        size_to_write -= top_size;
+        src += top_size;
+    }
+    memcpy(_end, src, size_to_write);
+    _end = wrap_if_bufend(_end + size_to_write);
+    return size_written;
+}
+
+void cbuf::flush()
+{
+    _begin = _buf;
+    _end = _buf;
+}
+
+size_t cbuf::remove(size_t size)
+{
+    size_t bytes_available = available();
+    if(size >= bytes_available) {
+        flush();
+        return 0;
+    }
+    size_t size_to_remove = (size < bytes_available) ? size : bytes_available;
+    if(_end < _begin && size_to_remove > (size_t) (_bufend - _begin)) {
+        size_t top_size = _bufend - _begin;
+        _begin = _buf;
+        size_to_remove -= top_size;
+    }
+    _begin = wrap_if_bufend(_begin + size_to_remove);
+    return available();
+}

cores/esp32/cbuf.h

@@ -0,0 +1,79 @@
+/*
+ cbuf.h - Circular buffer implementation
+ Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
+ This file is part of the esp8266 core for Arduino environment.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __cbuf_h
+#define __cbuf_h
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+class cbuf
+{
+public:
+    cbuf(size_t size);
+    ~cbuf();
+
+    size_t resizeAdd(size_t addSize);
+    size_t resize(size_t newSize);
+    size_t available() const;
+    size_t size();
+
+    size_t room() const;
+
+    inline bool empty() const
+    {
+        return _begin == _end;
+    }
+
+    inline bool full() const
+    {
+        return wrap_if_bufend(_end + 1) == _begin;
+    }
+
+    int peek();
+    size_t peek(char *dst, size_t size);
+
+    int read();
+    size_t read(char* dst, size_t size);
+
+    size_t write(char c);
+    size_t write(const char* src, size_t size);
+
+    void flush();
+    size_t remove(size_t size);
+
+    cbuf *next;
+
+private:
+    inline char* wrap_if_bufend(char* ptr) const
+    {
+        return (ptr == _bufend) ? _buf : ptr;
+    }
+
+    size_t _size;
+    char* _buf;
+    const char* _bufend;
+    char* _begin;
+    char* _end;
+
+};
+
+#endif//__cbuf_h

cores/esp32/esp32-hal-adc.c

@@ -13,20 +13,18 @@
 // limitations under the License.
 
 #include "esp32-hal-adc.h"
-#include "esp32-hal-log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_attr.h"
-#include "soc/rtc_io_reg.h"
 #include "soc/rtc_cntl_reg.h"
-#include "soc/sens_reg.h"
-
 #include "driver/adc.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
 #include "esp_adc_cal.h"
+#include "soc/sens_reg.h"
+#include "soc/rtc_io_reg.h"
 #include "esp32/rom/ets_sys.h"
 #include "esp_intr_alloc.h"
 #define DEFAULT_VREF    1100
@@ -35,25 +33,44 @@ static uint16_t __analogVRef = 0;
 static uint8_t __analogVRefPin = 0;
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/rom/ets_sys.h"
-#else 
+#include "soc/sens_reg.h"
+#include "soc/rtc_io_reg.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
+#else
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
 #else // ESP32 Before IDF 4.0
 #include "rom/ets_sys.h"
 #include "esp_intr.h"
 #endif
-#include "esp32-hal-gpio.h"
 
 static uint8_t __analogAttenuation = 3;//11db
-static uint8_t __analogWidth = 3;//12 bits
+static uint8_t __analogWidth = ADC_WIDTH_MAX - 1; //3 for ESP32/ESP32C3; 4 for ESP32S2
+static uint8_t __analogReturnedWidth = SOC_ADC_MAX_BITWIDTH; //12 for ESP32/ESP32C3; 13 for ESP32S2
 static uint8_t __analogClockDiv = 1;
+static adc_attenuation_t __pin_attenuation[SOC_GPIO_PIN_COUNT];
+
+static inline uint16_t mapResolution(uint16_t value)
+{
+    uint8_t from = __analogWidth + 9;
+    if (from == __analogReturnedWidth) {
+        return value;
+    }
+    if (from > __analogReturnedWidth) {
+        return value >> (from  - __analogReturnedWidth);
+    }
+    return value << (__analogReturnedWidth - from);
+}
 
 void __analogSetClockDiv(uint8_t clockDiv){
     if(!clockDiv){
         clockDiv = 1;
     }
     __analogClockDiv = clockDiv;
+#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
     adc_set_clk_div(__analogClockDiv);
+#endif
 }
 
 void __analogSetAttenuation(adc_attenuation_t attenuation)
@@ -83,6 +100,9 @@ void __analogInit(){
 #if CONFIG_IDF_TARGET_ESP32
     __analogSetWidth(__analogWidth + 9);//in bits
 #endif
+    for(int i=0; i<SOC_GPIO_PIN_COUNT; i++){
+        __pin_attenuation[i] = ADC_ATTENDB_MAX;
+    }
 }
 
 void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
@@ -97,6 +117,9 @@ void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
         adc1_config_channel_atten(channel, attenuation);
     }
     __analogInit();
+    if((__pin_attenuation[pin] != ADC_ATTENDB_MAX) || (attenuation != __analogAttenuation)){
+        __pin_attenuation[pin] = attenuation;
+    }
 }
 
 bool __adcAttachPin(uint8_t pin){
@@ -105,6 +128,7 @@ bool __adcAttachPin(uint8_t pin){
         log_e("Pin %u is not ADC pin!", pin);
         return false;
     }
+    __analogInit();
     int8_t pad = digitalPinToTouchChannel(pin);
     if(pad >= 0){
 #if CONFIG_IDF_TARGET_ESP32
@@ -116,14 +140,17 @@ bool __adcAttachPin(uint8_t pin){
             WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG, touch);
         }
 #endif
-    } else if(pin == 25){
+    }
+#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
+    else if(pin == 25){
         CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);//stop dac1
     } else if(pin == 26){
         CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);//stop dac2
     }
+#endif
 
     pinMode(pin, ANALOG);
-    __analogSetPinAttenuation(pin, __analogAttenuation);
+    __analogSetPinAttenuation(pin, (__pin_attenuation[pin] != ADC_ATTENDB_MAX)?__pin_attenuation[pin]:__analogAttenuation);
     return true;
 }
 
@@ -132,6 +159,7 @@ void __analogReadResolution(uint8_t bits)
     if(!bits || bits > 16){
         return;
     }
+    __analogReturnedWidth = bits;
 #if CONFIG_IDF_TARGET_ESP32
     __analogSetWidth(bits);         // hadware from 9 to 12
 #endif
@@ -151,18 +179,19 @@ uint16_t __analogRead(uint8_t pin)
         channel -= 10;
         r = adc2_get_raw( channel, __analogWidth, &value);
         if ( r == ESP_OK ) {
-            return value;
+            return mapResolution(value);
         } else if ( r == ESP_ERR_INVALID_STATE ) {
             log_e("GPIO%u: %s: ADC2 not initialized yet.", pin, esp_err_to_name(r));
         } else if ( r == ESP_ERR_TIMEOUT ) {
-            log_e("GPIO%u: %s: ADC2 is in use by Wi-Fi.", pin, esp_err_to_name(r));
+            log_e("GPIO%u: %s: ADC2 is in use by Wi-Fi. Please see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html#adc-limitations for more info", pin, esp_err_to_name(r));
         } else {
             log_e("GPIO%u: %s", pin, esp_err_to_name(r));
         }
     } else {
-        return adc1_get_raw(channel);
+        value = adc1_get_raw(channel);
+        return mapResolution(value);
     }
-    return value;
+    return mapResolution(value);
 }
 
 uint32_t __analogReadMilliVolts(uint8_t pin){
@@ -239,28 +268,12 @@ void __analogSetVRefPin(uint8_t pin){
     __analogVRefPin = pin;
 }
 
-int __hallRead()    //hall sensor without LNA
+int __hallRead()    //hall sensor using idf read
 {
-    int Sens_Vp0;
-    int Sens_Vn0;
-    int Sens_Vp1;
-    int Sens_Vn1;
-
     pinMode(36, ANALOG);
     pinMode(39, ANALOG);
-    SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE_M);     // hall sens force enable
-    SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_XPD_HALL);               // xpd hall
-    SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE_M);   // phase force
-    CLEAR_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE);           // hall phase
-    Sens_Vp0 = __analogRead(36);
-    Sens_Vn0 = __analogRead(39);
-    SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE);
-    Sens_Vp1 = __analogRead(36);
-    Sens_Vn1 = __analogRead(39);
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
-    CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE);
-    CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE);
-    return (Sens_Vp1 - Sens_Vp0) - (Sens_Vn1 - Sens_Vn0);
+    __analogSetWidth(12);
+    return hall_sensor_read();
 }
 #endif
 

cores/esp32/esp32-hal-adc.h

@@ -24,15 +24,14 @@
 extern "C" {
 #endif
 
-#include <stdint.h>
-#include <stdbool.h>
-//#include "esp32-hal.h"
+#include "esp32-hal.h"
 
 typedef enum {
     ADC_0db,
     ADC_2_5db,
     ADC_6db,
-    ADC_11db
+    ADC_11db,
+    ADC_ATTENDB_MAX
 } adc_attenuation_t;
 
 /*

cores/esp32/esp32-hal-bt.c

@@ -0,0 +1,100 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "esp32-hal-bt.h"
+
+#ifdef CONFIG_BT_ENABLED
+
+bool btInUse(){ return true; }
+
+#include "esp_bt.h"
+
+#ifdef CONFIG_BTDM_CONTROLLER_MODE_BTDM
+#define BT_MODE ESP_BT_MODE_BTDM
+#elif defined(CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY)
+#define BT_MODE ESP_BT_MODE_CLASSIC_BT
+#else
+#define BT_MODE ESP_BT_MODE_BLE
+#endif
+
+bool btStarted(){
+    return (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED);
+}
+
+bool btStart(){
+    esp_bt_controller_config_t cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED){
+        return true;
+    }
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_IDLE){
+        esp_bt_controller_init(&cfg);
+        while(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_IDLE){}
+    }
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_INITED){
+        if (esp_bt_controller_enable(BT_MODE)) {
+            log_e("BT Enable failed");
+            return false;
+        }
+    }
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED){
+        return true;
+    }
+    log_e("BT Start failed");
+    return false;
+}
+
+bool btStop(){
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_IDLE){
+        return true;
+    }
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED){
+        if (esp_bt_controller_disable()) {
+            log_e("BT Disable failed");
+            return false;
+        }
+        while(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED);
+    }
+    if(esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_INITED){
+        if (esp_bt_controller_deinit()) {
+			log_e("BT deint failed");
+			return false;
+		}
+		vTaskDelay(1);
+		if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_IDLE) {			
+			return false;		
+		}
+        return true;
+    }
+    log_e("BT Stop failed");
+    return false;
+}
+
+#else // CONFIG_BT_ENABLED
+bool btStarted()
+{
+    return false;
+}
+
+bool btStart()
+{
+    return false;
+}
+
+bool btStop()
+{
+    return false;
+}
+
+#endif // CONFIG_BT_ENABLED
+

cores/esp32/esp32-hal-bt.h

@@ -0,0 +1,32 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef _ESP32_ESP32_HAL_BT_H_
+#define _ESP32_ESP32_HAL_BT_H_
+
+#include "esp32-hal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool btStarted();
+bool btStart();
+bool btStop();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ESP32_ESP32_HAL_BT_H_ */

cores/esp32/esp32-hal-cpu.c

@@ -16,7 +16,6 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
 #include "freertos/task.h"
-#include "freertos/xtensa_timer.h"
 #include "esp_attr.h"
 #include "esp_log.h"
 #include "soc/rtc.h"
@@ -25,14 +24,17 @@
 #include "soc/efuse_reg.h"
 #include "esp32-hal.h"
 #include "esp32-hal-cpu.h"
-#include "esp32-hal-log.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "freertos/xtensa_timer.h"
 #include "esp32/rom/rtc.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
+#include "freertos/xtensa_timer.h"
 #include "esp32s2/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/rtc.h"
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -49,7 +51,7 @@ typedef struct apb_change_cb_s {
 
 
 static apb_change_t * apb_change_callbacks = NULL;
-static SemaphoreHandle_t apb_change_lock = NULL;
+static xSemaphoreHandle apb_change_lock = NULL;
 
 static void initApbChangeCallback(){
     static volatile bool initialized = false;
@@ -102,7 +104,7 @@ bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
         // look for duplicate callbacks
         while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
         if (r) {
-            log_e("duplicate func=%08X arg=%08X",(unsigned int)c->cb,(unsigned int)c->arg);
+            log_e("duplicate func=%08X arg=%08X",c->cb,c->arg);
             free(c);
             xSemaphoreGive(apb_change_lock);
             return false;
@@ -124,7 +126,7 @@ bool removeApbChangeCallback(void * arg, apb_change_cb_t cb){
     // look for matching callback
     while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
     if ( r == NULL ) {
-        log_e("not found func=%08X arg=%08X",(unsigned int)cb,(unsigned int)arg);
+        log_e("not found func=%08X arg=%08X",cb,arg);
         xSemaphoreGive(apb_change_lock);
         return false;
         }
@@ -142,10 +144,14 @@ bool removeApbChangeCallback(void * arg, apb_change_cb_t cb){
 }
 
 static uint32_t calculateApb(rtc_cpu_freq_config_t * conf){
+#if CONFIG_IDF_TARGET_ESP32C3
+	return APB_CLK_FREQ;
+#else
     if(conf->freq_mhz >= 80){
         return 80 * MHZ;
     }
     return (conf->source_freq_mhz * MHZ) / conf->div;
+#endif
 }
 
 void esp_timer_impl_update_apb_freq(uint32_t apb_ticks_per_us); //private in IDF
@@ -220,8 +226,12 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
         esp_timer_impl_update_apb_freq(apb / MHZ);
     }
     //Update FreeRTOS Tick Divisor
+#if CONFIG_IDF_TARGET_ESP32C3
+
+#else
     uint32_t fcpu = (conf.freq_mhz >= 80)?(conf.freq_mhz * MHZ):(apb);
     _xt_tick_divisor = fcpu / XT_TICK_PER_SEC;
+#endif
     //Call peripheral functions after the APB change
     if(apb_change_callbacks){
         triggerApbChangeCallback(APB_AFTER_CHANGE, capb, apb);

cores/esp32/esp32-hal-cpu.h

@@ -45,16 +45,4 @@ uint32_t getApbFrequency();     // In Hz
 }
 #endif
 
-#ifndef F_CPU
-#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
-#define F_CPU (CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ * 1000000U)
-#elif CONFIG_IDF_TARGET_ESP32S2
-#define F_CPU (CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ * 1000000U)
-#endif
-#endif
-
-#define clockCyclesPerMicrosecond() ( (long int)getCpuFrequencyMhz() )
-#define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
-#define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
-
 #endif /* _ESP32_HAL_CPU_H_ */

cores/esp32/esp32-hal-dac.c

@@ -13,24 +13,28 @@
 // limitations under the License.
 
 #include "esp32-hal.h"
-#include "esp_attr.h"
+
+#if CONFIG_IDF_TARGET_ESP32
 #include "soc/rtc_io_reg.h"
+#define DAC1 25
+#define DAC2 26
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "soc/rtc_io_reg.h"
+#define DAC1 17
+#define DAC2 18
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define NODAC
+#else
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+
+#ifndef NODAC
+#include "esp_attr.h"
 #include "soc/rtc_cntl_reg.h"
 #include "soc/rtc_io_periph.h"
 #include "soc/sens_reg.h"
 #include "soc/sens_struct.h"
 #include "driver/dac.h"
-#include "esp32-hal-gpio.h"
-
-#if CONFIG_IDF_TARGET_ESP32
-#define DAC1 25
-#define DAC2 26
-#elif CONFIG_IDF_TARGET_ESP32S2
-#define DAC1 17
-#define DAC2 18
-#else
-#error Target CONFIG_IDF_TARGET is not supported
-#endif
 
 void ARDUINO_ISR_ATTR __dacWrite(uint8_t pin, uint8_t value)
 {
@@ -55,3 +59,5 @@ void ARDUINO_ISR_ATTR __dacWrite(uint8_t pin, uint8_t value)
 }
 
 extern void dacWrite(uint8_t pin, uint8_t value) __attribute__ ((weak, alias("__dacWrite")));
+
+#endif

cores/esp32/esp32-hal-dac.h

@@ -24,6 +24,9 @@
 extern "C" {
 #endif
 
+#include "esp32-hal.h"
+#include "driver/gpio.h"
+
 void dacWrite(uint8_t pin, uint8_t value);
 
 #ifdef __cplusplus

cores/esp32/esp32-hal-gpio.c

@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "esp32-hal.h"
 #include "esp32-hal-gpio.h"
 #include "pins_arduino.h"
 #include "freertos/FreeRTOS.h"
@@ -21,24 +20,25 @@
 #include "soc/gpio_reg.h"
 #include "soc/io_mux_reg.h"
 #include "soc/gpio_struct.h"
-#include "soc/rtc_io_reg.h"
-#include "soc/rtc_io_periph.h"
-
+#include "driver/gpio.h"
 #include "esp_system.h"
+
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
 #include "esp32/rom/ets_sys.h"
 #include "esp32/rom/gpio.h"
 #include "esp_intr_alloc.h"
+#include "soc/rtc_io_reg.h"
 #define GPIO_FUNC 2
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/rom/ets_sys.h"
 #include "esp32s2/rom/gpio.h"
 #include "esp_intr_alloc.h"
 #include "soc/periph_defs.h"
+#include "soc/rtc_io_reg.h"
 #define GPIO_FUNC 1
 #else 
-#error Target CONFIG_IDF_TARGET is not supported
+#define USE_ESP_IDF_GPIO 1
 #endif
 #else // ESP32 Before IDF 4.0
 #include "rom/ets_sys.h"
@@ -159,7 +159,45 @@ static InterruptHandle_t __pinInterruptHandlers[SOC_GPIO_PIN_COUNT] = {0,};
 
 extern void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode)
 {
+#if USE_ESP_IDF_GPIO
+	if (!GPIO_IS_VALID_GPIO(pin)) {
+		return;
+	}
+	gpio_config_t conf = {
+		    .pin_bit_mask = (1ULL<<pin),			/*!< GPIO pin: set with bit mask, each bit maps to a GPIO */
+		    .mode = GPIO_MODE_DISABLE,              /*!< GPIO mode: set input/output mode                     */
+		    .pull_up_en = GPIO_PULLUP_DISABLE,      /*!< GPIO pull-up                                         */
+		    .pull_down_en = GPIO_PULLDOWN_DISABLE,  /*!< GPIO pull-down                                       */
+		    .intr_type = GPIO_INTR_DISABLE      	/*!< GPIO interrupt type                                  */
+	};
+	if (mode < 0x20) {//io
+		conf.mode = mode & (INPUT | OUTPUT);
+		if (mode & OPEN_DRAIN) {
+			conf.mode |= GPIO_MODE_DEF_OD;
+		}
+		if (mode & PULLUP) {
+			conf.pull_up_en = GPIO_PULLUP_ENABLE;
+		}
+		if (mode & PULLDOWN) {
+			conf.pull_down_en = GPIO_PULLDOWN_ENABLE;
+		}
+	}
+	gpio_config(&conf);
 
+	if(mode == SPECIAL){
+#if CONFIG_IDF_TARGET_ESP32
+		PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pin], (uint32_t)(((pin)==RX||(pin)==TX)?0:1));
+#elif CONFIG_IDF_TARGET_ESP32S2
+		PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pin], (uint32_t)(((pin)==RX||(pin)==TX)?0:2));
+#endif
+	} else if(mode == ANALOG){
+#if !CONFIG_IDF_TARGET_ESP32C3
+		//adc_gpio_init(ADC_UNIT_1, ADC_CHANNEL_0);
+#endif
+	} else if(mode >= 0x20 && mode < ANALOG) {//function
+		PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pin], mode >> 5);
+	}
+#else
     if(!digitalPinIsValid(pin)) {
         return;
     }
@@ -230,11 +268,7 @@ extern void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode)
     pinFunction |= FUN_IE;//input enable but required for output as well?
 
     if(mode & (INPUT | OUTPUT)) {
-#if CONFIG_IDF_TARGET_ESP32
-        pinFunction |= ((uint32_t)2 << MCU_SEL_S);
-#elif CONFIG_IDF_TARGET_ESP32S2
-        pinFunction |= ((uint32_t)1 << MCU_SEL_S);
-#endif
+        pinFunction |= ((uint32_t)PIN_FUNC_GPIO << MCU_SEL_S);
     } else if(mode == SPECIAL) {
 #if CONFIG_IDF_TARGET_ESP32
         pinFunction |= ((uint32_t)(((pin)==RX||(pin)==TX)?0:1) << MCU_SEL_S);
@@ -252,10 +286,20 @@ extern void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode)
     }
 
     GPIO.pin[pin].val = pinControl;
+#endif
 }
 
 extern void ARDUINO_ISR_ATTR __digitalWrite(uint8_t pin, uint8_t val)
 {
+#if USE_ESP_IDF_GPIO
+	gpio_set_level((gpio_num_t)pin, val);
+#elif CONFIG_IDF_TARGET_ESP32C3
+    if (val) {
+    	GPIO.out_w1ts.out_w1ts = (1 << pin);
+    } else {
+    	GPIO.out_w1tc.out_w1tc = (1 << pin);
+    }
+#else
     if(val) {
         if(pin < 32) {
             GPIO.out_w1ts = ((uint32_t)1 << pin);
@@ -269,18 +313,37 @@ extern void ARDUINO_ISR_ATTR __digitalWrite(uint8_t pin, uint8_t val)
             GPIO.out1_w1tc.val = ((uint32_t)1 << (pin - 32));
         }
     }
+#endif
 }
 
 extern int ARDUINO_ISR_ATTR __digitalRead(uint8_t pin)
 {
+#if USE_ESP_IDF_GPIO
+	return gpio_get_level((gpio_num_t)pin);
+#elif CONFIG_IDF_TARGET_ESP32C3
+	return (GPIO.in.data >> pin) & 0x1;
+#else
     if(pin < 32) {
         return (GPIO.in >> pin) & 0x1;
     } else if(pin < GPIO_PIN_COUNT) {
         return (GPIO.in1.val >> (pin - 32)) & 0x1;
     }
     return 0;
+#endif
 }
 
+#if USE_ESP_IDF_GPIO
+static void ARDUINO_ISR_ATTR __onPinInterrupt(void * arg) {
+	InterruptHandle_t * isr = (InterruptHandle_t*)arg;
+    if(isr->fn) {
+        if(isr->arg){
+            ((voidFuncPtrArg)isr->fn)(isr->arg);
+        } else {
+        	isr->fn();
+        }
+    }
+}
+#else
 static intr_handle_t gpio_intr_handle = NULL;
 
 static void ARDUINO_ISR_ATTR __onPinInterrupt()
@@ -322,6 +385,7 @@ static void ARDUINO_ISR_ATTR __onPinInterrupt()
         } while(++pin<GPIO_PIN_COUNT);
     }
 }
+#endif
 
 extern void cleanupFunctional(void* arg);
 
@@ -330,8 +394,17 @@ extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc,
     static bool interrupt_initialized = false;
 
     if(!interrupt_initialized) {
+#if USE_ESP_IDF_GPIO
+    	esp_err_t err = gpio_install_isr_service((int)ARDUINO_ISR_FLAG);
+    	interrupt_initialized = (err == ESP_OK) || (err == ESP_ERR_INVALID_STATE);
+#else
         interrupt_initialized = true;
         esp_intr_alloc(ETS_GPIO_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, __onPinInterrupt, NULL, &gpio_intr_handle);
+#endif
+    }
+    if(!interrupt_initialized) {
+    	log_e("GPIO ISR Service Failed To Start");
+    	return;
     }
 
     // if new attach without detach remove old info
@@ -343,6 +416,14 @@ extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc,
     __pinInterruptHandlers[pin].arg = arg;
     __pinInterruptHandlers[pin].functional = functional;
 
+#if USE_ESP_IDF_GPIO
+    gpio_set_intr_type((gpio_num_t)pin, (gpio_int_type_t)(intr_type & 0x7));
+    if(intr_type & 0x8){
+    	gpio_wakeup_enable((gpio_num_t)pin, (gpio_int_type_t)(intr_type & 0x7));
+    }
+    gpio_isr_handler_add((gpio_num_t)pin, __onPinInterrupt, &__pinInterruptHandlers[pin]);
+    gpio_intr_enable((gpio_num_t)pin);
+#else
     esp_intr_disable(gpio_intr_handle);
 #if CONFIG_IDF_TARGET_ESP32
     if(esp_intr_get_cpu(gpio_intr_handle)) { //APP_CPU
@@ -355,6 +436,7 @@ extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc,
 #endif
     GPIO.pin[pin].int_type = intr_type;
     esp_intr_enable(gpio_intr_handle);
+#endif
 }
 
 extern void __attachInterruptArg(uint8_t pin, voidFuncPtrArg userFunc, void * arg, int intr_type)
@@ -368,7 +450,13 @@ extern void __attachInterrupt(uint8_t pin, voidFuncPtr userFunc, int intr_type)
 
 extern void __detachInterrupt(uint8_t pin)
 {
+#if USE_ESP_IDF_GPIO
+	gpio_intr_disable((gpio_num_t)pin);
+	gpio_isr_handler_remove((gpio_num_t)pin);
+	gpio_wakeup_disable((gpio_num_t)pin);
+#else
     esp_intr_disable(gpio_intr_handle);
+#endif
     if (__pinInterruptHandlers[pin].functional && __pinInterruptHandlers[pin].arg)
     {
     	cleanupFunctional(__pinInterruptHandlers[pin].arg);
@@ -377,9 +465,13 @@ extern void __detachInterrupt(uint8_t pin)
     __pinInterruptHandlers[pin].arg = NULL;
     __pinInterruptHandlers[pin].functional = false;
 
+#if USE_ESP_IDF_GPIO
+    gpio_set_intr_type((gpio_num_t)pin, GPIO_INTR_DISABLE);
+#else
     GPIO.pin[pin].int_ena = 0;
     GPIO.pin[pin].int_type = 0;
     esp_intr_enable(gpio_intr_handle);
+#endif
 }
 
 

cores/esp32/esp32-hal-gpio.h

@@ -24,11 +24,11 @@
 extern "C" {
 #endif
 
-#include "stdint.h"
+#include "esp32-hal.h"
 #include "soc/soc_caps.h"
 
 #if (CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3)
-#define NUM_OUPUT_PINS  45
+#define NUM_OUPUT_PINS  46
 #define PIN_DAC1        17
 #define PIN_DAC2        18
 #else

cores/esp32/esp32-hal-i2c-slave.c

@@ -0,0 +1,848 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <string.h>
+#include <math.h>
+
+#include "sdkconfig.h"
+#include "esp_attr.h"
+#include "rom/gpio.h"
+#include "soc/gpio_sig_map.h"
+#include "hal/gpio_types.h"
+#include "driver/gpio.h"
+#include "esp_err.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+#include "freertos/ringbuf.h"
+
+#include "esp_intr_alloc.h"
+#include "driver/periph_ctrl.h"
+#include "soc/i2c_reg.h"
+#include "soc/i2c_struct.h"
+#include "hal/i2c_ll.h"
+#include "esp32-hal-log.h"
+#include "esp32-hal-i2c-slave.h"
+
+#define I2C_SLAVE_USE_RX_QUEUE 0 // 1: Queue, 0: RingBuffer
+
+#if SOC_I2C_NUM > 1
+#define I2C_SCL_IDX(p)  ((p==0)?I2CEXT0_SCL_OUT_IDX:((p==1)?I2CEXT1_SCL_OUT_IDX:0))
+#define I2C_SDA_IDX(p) ((p==0)?I2CEXT0_SDA_OUT_IDX:((p==1)?I2CEXT1_SDA_OUT_IDX:0))
+#else
+#define I2C_SCL_IDX(p)  I2CEXT0_SCL_OUT_IDX
+#define I2C_SDA_IDX(p) I2CEXT0_SDA_OUT_IDX
+#endif
+
+#if CONFIG_IDF_TARGET_ESP32
+    #define I2C_TXFIFO_WM_INT_ENA    I2C_TXFIFO_EMPTY_INT_ENA
+    #define I2C_RXFIFO_WM_INT_ENA     I2C_RXFIFO_FULL_INT_ENA
+#endif
+
+enum {
+    I2C_SLAVE_EVT_RX, I2C_SLAVE_EVT_TX
+};
+
+typedef struct i2c_slave_struct_t {
+    i2c_dev_t * dev;
+    uint8_t num;
+    int8_t sda;
+    int8_t scl;
+    i2c_slave_request_cb_t request_callback;
+    i2c_slave_receive_cb_t receive_callback;
+    void * arg;
+    intr_handle_t intr_handle;
+    TaskHandle_t task_handle;
+    xQueueHandle event_queue;
+#if I2C_SLAVE_USE_RX_QUEUE
+    xQueueHandle rx_queue;
+#else
+    RingbufHandle_t rx_ring_buf;
+#endif
+    xQueueHandle tx_queue;
+    uint32_t rx_data_count;
+#if !CONFIG_DISABLE_HAL_LOCKS
+    xSemaphoreHandle lock;
+#endif
+} i2c_slave_struct_t;
+
+typedef union {
+    struct {
+        uint32_t event : 2;
+        uint32_t stop : 1;
+        uint32_t param : 29;
+    };
+    uint32_t val;
+} i2c_slave_queue_event_t;
+
+static i2c_slave_struct_t _i2c_bus_array[SOC_I2C_NUM] = {
+    { &I2C0, 0, -1, -1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0
+#if !CONFIG_DISABLE_HAL_LOCKS
+    , NULL
+#endif
+    },
+#if SOC_I2C_NUM > 1
+    { &I2C1, 1, -1, -1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0
+#if !CONFIG_DISABLE_HAL_LOCKS
+    , NULL
+#endif
+    }
+#endif
+};
+
+#if CONFIG_DISABLE_HAL_LOCKS
+#define I2C_SLAVE_MUTEX_LOCK()
+#define I2C_SLAVE_MUTEX_UNLOCK()
+#else
+#define I2C_SLAVE_MUTEX_LOCK()    if(i2c->lock){xSemaphoreTake(i2c->lock, portMAX_DELAY);}
+#define I2C_SLAVE_MUTEX_UNLOCK()  if(i2c->lock){xSemaphoreGive(i2c->lock);}
+#endif
+
+//-------------------------------------- HAL_LL (Missing Functions) ------------------------------------------------
+typedef enum {
+    I2C_STRETCH_CAUSE_MASTER_READ,
+    I2C_STRETCH_CAUSE_TX_FIFO_EMPTY,
+    I2C_STRETCH_CAUSE_RX_FIFO_FULL,
+    I2C_STRETCH_CAUSE_MAX
+} i2c_stretch_cause_t;
+
+static inline i2c_stretch_cause_t i2c_ll_stretch_cause(i2c_dev_t *hw)
+{
+#if CONFIG_IDF_TARGET_ESP32C3
+    return hw->sr.stretch_cause;
+#elif CONFIG_IDF_TARGET_ESP32S2
+    return hw->status_reg.stretch_cause;
+#else
+    return I2C_STRETCH_CAUSE_MAX;
+#endif
+}
+
+static inline void i2c_ll_set_stretch(i2c_dev_t *hw, uint16_t time)
+{
+#ifndef CONFIG_IDF_TARGET_ESP32
+    typeof(hw->scl_stretch_conf) scl_stretch_conf;
+    scl_stretch_conf.val = 0;
+    scl_stretch_conf.slave_scl_stretch_en = (time > 0);
+    scl_stretch_conf.stretch_protect_num = time;
+    scl_stretch_conf.slave_scl_stretch_clr = 1;
+    hw->scl_stretch_conf.val = scl_stretch_conf.val;
+    if(time > 0){
+        //enable interrupt
+        hw->int_ena.val |= I2C_SLAVE_STRETCH_INT_ENA;
+    } else {
+        //disable interrupt
+        hw->int_ena.val &= (~I2C_SLAVE_STRETCH_INT_ENA);
+    }
+#endif
+}
+
+static inline void i2c_ll_stretch_clr(i2c_dev_t *hw)
+{
+#ifndef CONFIG_IDF_TARGET_ESP32
+    hw->scl_stretch_conf.slave_scl_stretch_clr = 1;
+#endif
+}
+
+static inline bool i2c_ll_slave_addressed(i2c_dev_t *hw)
+{
+#if CONFIG_IDF_TARGET_ESP32C3
+    return hw->sr.slave_addressed;
+#else
+    return hw->status_reg.slave_addressed;
+#endif
+}
+
+static inline bool i2c_ll_slave_rw(i2c_dev_t *hw)//not exposed by hal_ll
+{
+#if CONFIG_IDF_TARGET_ESP32C3
+    return hw->sr.slave_rw;
+#else
+    return hw->status_reg.slave_rw;
+#endif
+}
+
+//-------------------------------------- PRIVATE (Function Prototypes) ------------------------------------------------
+static void i2c_slave_free_resources(i2c_slave_struct_t * i2c);
+static void i2c_slave_delay_us(uint64_t us);
+static void i2c_slave_gpio_mode(int8_t pin, gpio_mode_t mode);
+static bool i2c_slave_check_line_state(int8_t sda, int8_t scl);
+static bool i2c_slave_attach_gpio(i2c_slave_struct_t * i2c, int8_t sda, int8_t scl);
+static bool i2c_slave_detach_gpio(i2c_slave_struct_t * i2c);
+static bool i2c_slave_set_frequency(i2c_slave_struct_t * i2c, uint32_t clk_speed);
+static bool i2c_slave_send_event(i2c_slave_struct_t * i2c, i2c_slave_queue_event_t* event);
+static bool i2c_slave_handle_tx_fifo_empty(i2c_slave_struct_t * i2c);
+static bool i2c_slave_handle_rx_fifo_full(i2c_slave_struct_t * i2c, uint32_t len);
+static size_t i2c_slave_read_rx(i2c_slave_struct_t * i2c, uint8_t * data, size_t len);
+static void i2c_slave_isr_handler(void* arg);
+static void i2c_slave_task(void *pv_args);
+
+
+//=====================================================================================================================
+//-------------------------------------- Public Functions -------------------------------------------------------------
+//=====================================================================================================================
+
+esp_err_t i2cSlaveAttachCallbacks(uint8_t num, i2c_slave_request_cb_t request_callback, i2c_slave_receive_cb_t receive_callback, void * arg){
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c->request_callback = request_callback;
+    i2c->receive_callback = receive_callback;
+    i2c->arg = arg;
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ESP_OK;
+}
+
+esp_err_t i2cSlaveInit(uint8_t num, int sda, int scl, uint16_t slaveID, uint32_t frequency, size_t rx_len, size_t tx_len) {
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    if (sda < 0 || scl < 0) {
+        log_e("invalid pins sda=%d, scl=%d", sda, scl);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    if(!frequency){
+        frequency = 100000;
+    } else if(frequency > 1000000){
+        frequency = 1000000;
+    }
+
+    log_i("Initialising I2C Slave: sda=%d scl=%d freq=%d, addr=0x%x", sda, scl, frequency, slaveID);
+
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    esp_err_t ret = ESP_OK;
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(!i2c->lock){
+        i2c->lock = xSemaphoreCreateMutex();
+        if (i2c->lock == NULL) {
+            log_e("RX queue create failed");
+            return ESP_ERR_NO_MEM;
+        }
+    }
+#endif
+
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c_slave_free_resources(i2c);
+
+#if I2C_SLAVE_USE_RX_QUEUE
+    i2c->rx_queue = xQueueCreate(rx_len, sizeof(uint8_t));
+    if (i2c->rx_queue == NULL) {
+        log_e("RX queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+#else
+    i2c->rx_ring_buf = xRingbufferCreate(rx_len, RINGBUF_TYPE_BYTEBUF);
+    if (i2c->rx_ring_buf == NULL) {
+        log_e("RX RingBuf create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+#endif
+
+    i2c->tx_queue = xQueueCreate(tx_len, sizeof(uint8_t));
+    if (i2c->tx_queue == NULL) {
+        log_e("TX queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    i2c->event_queue = xQueueCreate(16, sizeof(i2c_slave_queue_event_t));
+    if (i2c->event_queue == NULL) {
+        log_e("Event queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    xTaskCreate(i2c_slave_task, "i2c_slave_task", 4096, i2c, 20, &i2c->task_handle);
+    if(i2c->task_handle == NULL){
+        log_e("Event thread create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    if (frequency == 0) {
+        frequency = 100000L;
+    }
+    frequency = (frequency * 5) / 4;
+
+    if (i2c->num == 0) {
+        periph_module_enable(PERIPH_I2C0_MODULE);
+#if SOC_I2C_NUM > 1
+    } else {
+        periph_module_enable(PERIPH_I2C1_MODULE);
+#endif
+    }
+    
+    i2c_ll_slave_init(i2c->dev);
+    i2c_ll_set_fifo_mode(i2c->dev, true);
+    i2c_ll_set_slave_addr(i2c->dev, slaveID, false);
+    i2c_ll_set_tout(i2c->dev, 32000);
+    i2c_slave_set_frequency(i2c, frequency);
+
+    if (!i2c_slave_check_line_state(sda, scl)) {
+        log_e("bad pin state");
+        ret = ESP_FAIL;
+        goto fail;
+    }
+
+    i2c_slave_attach_gpio(i2c, sda, scl);
+
+    if (i2c_ll_is_bus_busy(i2c->dev)) {
+        log_w("Bus busy, reinit");
+        ret = ESP_FAIL;
+        goto fail;
+    }
+
+    i2c_ll_disable_intr_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_clr_intsts_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_set_fifo_mode(i2c->dev, true);
+
+    if (!i2c->intr_handle) {
+        uint32_t flags = ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_SHARED;
+        if(i2c->num == 0) {
+            ret = esp_intr_alloc(ETS_I2C_EXT0_INTR_SOURCE, flags, &i2c_slave_isr_handler, i2c, &i2c->intr_handle);
+#if SOC_I2C_NUM > 1
+        } else {
+            ret = esp_intr_alloc(ETS_I2C_EXT1_INTR_SOURCE, flags, &i2c_slave_isr_handler, i2c, &i2c->intr_handle);
+#endif
+        }
+
+        if (ret != ESP_OK) {
+            log_e("install interrupt handler Failed=%d", ret);
+            goto fail;
+        }
+    }
+    
+    i2c_ll_txfifo_rst(i2c->dev);
+    i2c_ll_rxfifo_rst(i2c->dev);
+    i2c_ll_slave_enable_rx_it(i2c->dev);
+    i2c_ll_set_stretch(i2c->dev, 0x3FF);
+    i2c_ll_update(i2c->dev);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ret;
+
+fail:
+    i2c_slave_free_resources(i2c);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ret;
+}
+
+esp_err_t i2cSlaveDeinit(uint8_t num){
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    if(!i2c->lock){
+        log_e("Lock is not initialized! Did you call i2c_slave_init()?");
+        return ESP_ERR_NO_MEM;
+    }
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c_slave_free_resources(i2c);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ESP_OK;
+}
+
+size_t i2cSlaveWrite(uint8_t num, const uint8_t *buf, uint32_t len, uint32_t timeout_ms) {
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return 0;
+    }
+    size_t to_queue = 0, to_fifo = 0;
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    if(!i2c->lock){
+        log_e("Lock is not initialized! Did you call i2c_slave_init()?");
+        return ESP_ERR_NO_MEM;
+    }
+    if(!i2c->tx_queue){
+        return 0;
+    }
+    I2C_SLAVE_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32
+    //make sure that tx is idle
+    uint64_t tout_at = esp_timer_get_time() + (timeout_ms * 1000);
+    while(i2c_ll_slave_addressed(i2c->dev) && i2c_ll_slave_rw(i2c->dev)) {
+        // ongoing MASTER READ
+        //wait up to timeout_ms for current transaction to finish
+        vTaskDelay(2);
+        if((uint64_t)esp_timer_get_time() >= tout_at){
+            log_e("TX IDLE WAIT TIMEOUT!");
+            I2C_SLAVE_MUTEX_UNLOCK();
+            return 0;
+        }
+    }
+    i2c_ll_slave_disable_tx_it(i2c->dev);
+    if (i2c_ll_get_txfifo_len(i2c->dev) < SOC_I2C_FIFO_LEN) {
+        i2c_ll_txfifo_rst(i2c->dev);
+    }
+#endif
+    to_fifo = i2c_ll_get_txfifo_len(i2c->dev);
+    if(len < to_fifo){
+        to_fifo = len;
+    }
+    i2c_ll_write_txfifo(i2c->dev, (uint8_t*)buf, to_fifo);
+    buf += to_fifo;
+    len -= to_fifo;
+    //reset tx_queue
+    xQueueReset(i2c->tx_queue);
+    //write the rest of the bytes to the queue
+    if(len){
+        to_queue = uxQueueSpacesAvailable(i2c->tx_queue);
+        if(len < to_queue){
+            to_queue = len;
+        }
+        for (size_t i = 0; i < to_queue; i++) {
+            if (xQueueSend(i2c->tx_queue, &buf[i], timeout_ms / portTICK_RATE_MS) != pdTRUE) {
+                xQueueReset(i2c->tx_queue);
+                to_queue = 0;
+                break;
+            }
+        }
+        //no need to enable TX_EMPTY if tx_queue is empty
+        if(to_queue){
+            i2c_ll_slave_enable_tx_it(i2c->dev);
+        }
+    }
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return to_queue + to_fifo;
+}
+
+//=====================================================================================================================
+//-------------------------------------- Private Functions ------------------------------------------------------------
+//=====================================================================================================================
+
+static void i2c_slave_free_resources(i2c_slave_struct_t * i2c){
+    i2c_slave_detach_gpio(i2c);
+    i2c_ll_set_slave_addr(i2c->dev, 0, false);
+    i2c_ll_disable_intr_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_clr_intsts_mask(i2c->dev, I2C_LL_INTR_MASK);
+
+    if (i2c->intr_handle) {
+        esp_intr_free(i2c->intr_handle);
+        i2c->intr_handle = NULL;
+    }
+
+    if(i2c->task_handle){
+        vTaskDelete(i2c->task_handle);
+        i2c->task_handle = NULL;
+    }
+
+#if I2C_SLAVE_USE_RX_QUEUE
+    if (i2c->rx_queue) {
+        vQueueDelete(i2c->rx_queue);
+        i2c->rx_queue = NULL;
+    }
+#else
+    if (i2c->rx_ring_buf) {
+        vRingbufferDelete(i2c->rx_ring_buf);
+        i2c->rx_ring_buf = NULL;
+    }
+#endif
+
+    if (i2c->tx_queue) {
+        vQueueDelete(i2c->tx_queue);
+        i2c->tx_queue = NULL;
+    }
+
+    if (i2c->event_queue) {
+        vQueueDelete(i2c->event_queue);
+        i2c->event_queue = NULL;
+    }
+
+    i2c->rx_data_count = 0;
+}
+
+static bool i2c_slave_set_frequency(i2c_slave_struct_t * i2c, uint32_t clk_speed)
+{
+    if (i2c == NULL) {
+        log_e("no control buffer");
+        return false;
+    }
+    if(clk_speed > 1100000UL){
+        clk_speed = 1100000UL;
+    }
+
+    // Adjust Fifo thresholds based on frequency
+    uint32_t a = (clk_speed / 50000L) + 2;
+    log_d("Fifo thresholds: rx_fifo_full = %d, tx_fifo_empty = %d", SOC_I2C_FIFO_LEN - a, a);
+
+    i2c_clk_cal_t clk_cal;
+#if SOC_I2C_SUPPORT_APB
+    i2c_ll_cal_bus_clk(APB_CLK_FREQ, clk_speed, &clk_cal);
+    i2c_ll_set_source_clk(i2c->dev, I2C_SCLK_APB);            /*!< I2C source clock from APB, 80M*/
+#elif SOC_I2C_SUPPORT_XTAL
+    i2c_ll_cal_bus_clk(XTAL_CLK_FREQ, clk_speed, &clk_cal);
+    i2c_ll_set_source_clk(i2c->dev, I2C_SCLK_XTAL);           /*!< I2C source clock from XTAL, 40M */
+#endif
+    i2c_ll_set_txfifo_empty_thr(i2c->dev, a);
+    i2c_ll_set_rxfifo_full_thr(i2c->dev, SOC_I2C_FIFO_LEN - a);
+    i2c_ll_set_bus_timing(i2c->dev, &clk_cal);
+    i2c_ll_set_filter(i2c->dev, 3);
+    return true;
+}
+
+static void i2c_slave_delay_us(uint64_t us)
+{
+    uint64_t m = esp_timer_get_time();
+    if (us) {
+        uint64_t e = (m + us);
+        if (m > e) { //overflow
+            while ((uint64_t)esp_timer_get_time() > e);
+        }
+        while ((uint64_t)esp_timer_get_time() < e);
+    }
+}
+
+static void i2c_slave_gpio_mode(int8_t pin, gpio_mode_t mode)
+{
+    gpio_config_t conf = {
+        .pin_bit_mask = 1LL << pin,
+        .mode = mode,
+        .pull_up_en = GPIO_PULLUP_ENABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE
+    };
+    gpio_config(&conf);
+}
+
+static bool i2c_slave_check_line_state(int8_t sda, int8_t scl)
+{
+    if (sda < 0 || scl < 0) {
+        return false;//return false since there is nothing to do
+    }
+    // if the bus is not 'clear' try the cycling SCL until SDA goes High or 9 cycles
+    gpio_set_level(sda, 1);
+    gpio_set_level(scl, 1);
+    i2c_slave_gpio_mode(sda, GPIO_MODE_INPUT | GPIO_MODE_DEF_OD);
+    i2c_slave_gpio_mode(scl, GPIO_MODE_INPUT | GPIO_MODE_DEF_OD);
+    gpio_set_level(scl, 1);
+
+    if (!gpio_get_level(sda) || !gpio_get_level(scl)) { // bus in busy state
+        log_w("invalid state sda(%d)=%d, scl(%d)=%d", sda, gpio_get_level(sda), scl, gpio_get_level(scl));
+        for (uint8_t a=0; a<9; a++) {
+            i2c_slave_delay_us(5);
+            if (gpio_get_level(sda) && gpio_get_level(scl)) { // bus recovered
+                log_w("Recovered after %d Cycles",a);
+                gpio_set_level(sda,0); // start
+                i2c_slave_delay_us(5);
+                for (uint8_t a=0;a<9; a++) {
+                    gpio_set_level(scl,1);
+                    i2c_slave_delay_us(5);
+                    gpio_set_level(scl,0);
+                    i2c_slave_delay_us(5);
+                }
+                gpio_set_level(scl,1);
+                i2c_slave_delay_us(5);
+                gpio_set_level(sda,1); // stop
+                break;
+            }
+            gpio_set_level(scl, 0);
+            i2c_slave_delay_us(5);
+            gpio_set_level(scl, 1);
+        }
+    }
+
+    if (!gpio_get_level(sda) || !gpio_get_level(scl)) { // bus in busy state
+        log_e("Bus Invalid State, Can't init sda=%d, scl=%d",gpio_get_level(sda),gpio_get_level(scl));
+        return false; // bus is busy
+    }
+    return true;
+}
+
+static bool i2c_slave_attach_gpio(i2c_slave_struct_t * i2c, int8_t sda, int8_t scl)
+{
+    if (i2c == NULL) {
+        log_e("no control block");
+        return false;
+    }
+    
+    if ((sda < 0)||( scl < 0)) {
+        log_e("bad pins sda=%d, scl=%d",sda,scl);
+        return false;
+    }
+
+    i2c->scl = scl;
+    gpio_set_level(scl, 1);
+    i2c_slave_gpio_mode(scl, GPIO_MODE_INPUT_OUTPUT_OD);
+    gpio_matrix_out(scl, I2C_SCL_IDX(i2c->num), false, false);
+    gpio_matrix_in(scl, I2C_SCL_IDX(i2c->num), false);
+
+    i2c->sda = sda;
+    gpio_set_level(sda, 1);
+    i2c_slave_gpio_mode(sda, GPIO_MODE_INPUT_OUTPUT_OD);
+    gpio_matrix_out(sda, I2C_SDA_IDX(i2c->num), false, false);
+    gpio_matrix_in(sda, I2C_SDA_IDX(i2c->num), false);
+
+    return true;
+}
+
+static bool i2c_slave_detach_gpio(i2c_slave_struct_t * i2c)
+{
+    if (i2c == NULL) {
+        log_e("no control Block");
+        return false;
+    }
+    if (i2c->scl >= 0) {
+        gpio_matrix_out(i2c->scl, 0x100, false, false);
+        gpio_matrix_in(0x30, I2C_SCL_IDX(i2c->num), false);
+        i2c_slave_gpio_mode(i2c->scl, GPIO_MODE_INPUT);
+        i2c->scl = -1; // un attached
+    }
+    if (i2c->sda >= 0) {
+        gpio_matrix_out(i2c->sda, 0x100, false, false);
+        gpio_matrix_in(0x30, I2C_SDA_IDX(i2c->num), false);
+        i2c_slave_gpio_mode(i2c->sda, GPIO_MODE_INPUT);
+        i2c->sda = -1; // un attached
+    }
+    return true;
+}
+
+static bool i2c_slave_send_event(i2c_slave_struct_t * i2c, i2c_slave_queue_event_t* event)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    if(i2c->event_queue) {
+        if(xQueueSendFromISR(i2c->event_queue, event, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            //log_e("event_queue_full");
+        }
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static bool i2c_slave_handle_tx_fifo_empty(i2c_slave_struct_t * i2c)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    uint32_t d = 0, moveCnt = i2c_ll_get_txfifo_len(i2c->dev);
+    while (moveCnt > 0) { // read tx queue until Fifo is full or queue is empty
+        if(xQueueReceiveFromISR(i2c->tx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) == pdTRUE){
+            i2c_ll_write_txfifo(i2c->dev, (uint8_t*)&d, 1);
+            moveCnt--;
+        } else {
+            i2c_ll_slave_disable_tx_it(i2c->dev);
+            break;
+        }
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static bool i2c_slave_handle_rx_fifo_full(i2c_slave_struct_t * i2c, uint32_t len)
+{
+#if I2C_SLAVE_USE_RX_QUEUE
+    uint32_t d = 0;
+#else
+    uint8_t data[SOC_I2C_FIFO_LEN];
+#endif
+    bool pxHigherPriorityTaskWoken = false;
+#if I2C_SLAVE_USE_RX_QUEUE
+    while (len > 0) {
+        i2c_ll_read_rxfifo(i2c->dev, (uint8_t*)&d, 1);
+        if(xQueueSendFromISR(i2c->rx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            log_e("rx_queue_full");
+        } else {
+            i2c->rx_data_count++;
+        }
+        if (--len == 0) {
+            len = i2c_ll_get_rxfifo_cnt(i2c->dev);
+        }
+#else
+    if(len){
+        i2c_ll_read_rxfifo(i2c->dev, data, len);
+        if(xRingbufferSendFromISR(i2c->rx_ring_buf, (void*) data, len, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            log_e("rx_ring_buf_full");
+        } else {
+            i2c->rx_data_count += len;
+        }
+#endif
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static void i2c_slave_isr_handler(void* arg)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    i2c_slave_struct_t * i2c = (i2c_slave_struct_t *) arg; // recover data
+
+    uint32_t activeInt = i2c_ll_get_intsts_mask(i2c->dev);
+    i2c_ll_clr_intsts_mask(i2c->dev, activeInt);
+    uint8_t rx_fifo_len = i2c_ll_get_rxfifo_cnt(i2c->dev);
+    uint8_t tx_fifo_len = SOC_I2C_FIFO_LEN - i2c_ll_get_txfifo_len(i2c->dev);
+    bool slave_rw = i2c_ll_slave_rw(i2c->dev);
+
+    if(activeInt & I2C_RXFIFO_WM_INT_ENA){ // RX FiFo Full
+        pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+        i2c_ll_slave_enable_rx_it(i2c->dev);//is this necessary?
+    }
+
+    if(activeInt & I2C_TRANS_COMPLETE_INT_ENA){ // STOP
+        if(rx_fifo_len){ //READ RX FIFO
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+        }
+        if(i2c->rx_data_count){ //WRITE or RepeatedStart
+            //SEND RX Event
+            i2c_slave_queue_event_t event;
+            event.event = I2C_SLAVE_EVT_RX;
+            event.stop = !slave_rw;
+            event.param = i2c->rx_data_count;
+            pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+            //Zero RX count
+            i2c->rx_data_count = 0;
+        }
+        if(slave_rw){ // READ
+#if CONFIG_IDF_TARGET_ESP32
+            //SEND TX Event
+            i2c_slave_queue_event_t event;
+            event.event = I2C_SLAVE_EVT_TX;
+            pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+#else
+            //reset TX data
+            i2c_ll_txfifo_rst(i2c->dev);
+            uint8_t d;
+            while (xQueueReceiveFromISR(i2c->tx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) == pdTRUE) ;//flush partial write
+#endif
+        }
+    }
+
+#ifndef CONFIG_IDF_TARGET_ESP32
+    if(activeInt & I2C_SLAVE_STRETCH_INT_ENA){ // STRETCH
+        i2c_stretch_cause_t cause = i2c_ll_stretch_cause(i2c->dev);
+        if(cause == I2C_STRETCH_CAUSE_MASTER_READ){
+            //on C3 RX data dissapears with repeated start, so we need to get it here
+            if(rx_fifo_len){
+                pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+            }
+            //SEND TX Event
+            i2c_slave_queue_event_t event;
+            event.event = I2C_SLAVE_EVT_TX;
+            pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+            //will clear after execution
+        } else if(cause == I2C_STRETCH_CAUSE_TX_FIFO_EMPTY){
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_tx_fifo_empty(i2c);
+            i2c_ll_stretch_clr(i2c->dev);
+        } else if(cause == I2C_STRETCH_CAUSE_RX_FIFO_FULL){
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+            i2c_ll_stretch_clr(i2c->dev);
+        }
+    }
+#endif
+
+    if(activeInt & I2C_TXFIFO_WM_INT_ENA){ // TX FiFo Empty
+        pxHigherPriorityTaskWoken |= i2c_slave_handle_tx_fifo_empty(i2c);
+    }
+
+    if(pxHigherPriorityTaskWoken){
+        portYIELD_FROM_ISR();
+    }
+}
+
+static size_t i2c_slave_read_rx(i2c_slave_struct_t * i2c, uint8_t * data, size_t len){
+    if(!len){
+        return 0;
+    }
+#if I2C_SLAVE_USE_RX_QUEUE
+    uint8_t d = 0;
+    BaseType_t res = pdTRUE;
+    for(size_t i=0; i<len; i++) {
+        if(data){
+            res = xQueueReceive(i2c->rx_queue, &data[i], 0);
+        } else {
+            res = xQueueReceive(i2c->rx_queue, &d, 0);
+        }
+        if (res != pdTRUE) {
+            log_e("Read Queue(%u) Failed", i);
+            len = i;
+            break;
+        }
+    }
+    return (data)?len:0;
+#else
+    size_t  dlen = 0, 
+            to_read = len, 
+            so_far = 0, 
+            available = 0;
+    uint8_t * rx_data = NULL;
+
+    vRingbufferGetInfo(i2c->rx_ring_buf, NULL, NULL, NULL, NULL, &available);
+    if(available < to_read){
+        log_e("Less available than requested. %u < %u", available, len);
+        to_read = available;
+    }
+
+    while(to_read){
+        dlen = 0;
+        rx_data = (uint8_t *)xRingbufferReceiveUpTo(i2c->rx_ring_buf, &dlen, 0, to_read);
+        if(!rx_data){
+            log_e("Receive %u Failed", to_read);
+            return so_far;
+        }
+        if(data){
+            memcpy(data+so_far, rx_data, dlen);
+        }
+        vRingbufferReturnItem(i2c->rx_ring_buf, rx_data);
+        so_far+=dlen;
+        to_read-=dlen;
+    }
+    return (data)?so_far:0;
+#endif
+}
+
+static void i2c_slave_task(void *pv_args)
+{
+    i2c_slave_struct_t * i2c = (i2c_slave_struct_t *)pv_args;
+    i2c_slave_queue_event_t event;
+    size_t len = 0;
+    bool stop = false;
+    uint8_t * data = NULL;
+    for(;;){
+        if(xQueueReceive(i2c->event_queue, &event, portMAX_DELAY) == pdTRUE){
+            // Write
+            if(event.event == I2C_SLAVE_EVT_RX){
+                len = event.param;
+                stop = event.stop;
+                data = (len > 0)?(uint8_t*)malloc(len):NULL;
+
+                if(len && data == NULL){
+                    log_e("Malloc (%u) Failed", len);
+                }
+                len = i2c_slave_read_rx(i2c, data, len);
+                if(i2c->receive_callback){
+                    i2c->receive_callback(i2c->num, data, len, stop, i2c->arg);
+                }
+                free(data);
+
+            // Read
+            } else if(event.event == I2C_SLAVE_EVT_TX){
+                if(i2c->request_callback){
+                    i2c->request_callback(i2c->num, i2c->arg);
+                }
+                i2c_ll_stretch_clr(i2c->dev);
+            }
+        }
+    }
+    vTaskDelete(NULL);
+}

cores/esp32/esp32-hal-i2c-slave.h

@@ -0,0 +1,35 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "stdint.h"
+#include "stddef.h"
+#include "esp_err.h"
+
+typedef void (*i2c_slave_request_cb_t) (uint8_t num, void * arg);
+typedef void (*i2c_slave_receive_cb_t) (uint8_t num, uint8_t * data, size_t len, bool stop, void * arg);
+esp_err_t i2cSlaveAttachCallbacks(uint8_t num, i2c_slave_request_cb_t request_callback, i2c_slave_receive_cb_t receive_callback, void * arg);
+
+esp_err_t i2cSlaveInit(uint8_t num, int sda, int scl, uint16_t slaveID, uint32_t frequency, size_t rx_len, size_t tx_len);
+esp_err_t i2cSlaveDeinit(uint8_t num);
+size_t i2cSlaveWrite(uint8_t num, const uint8_t *buf, uint32_t len, uint32_t timeout_ms);
+
+#ifdef __cplusplus
+}
+#endif

cores/esp32/esp32-hal-i2c.h

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // modified Nov 2017 by Chuck Todd <StickBreaker> to support Interrupt Driven I/O
+// modified Nov 2021 by Hristo Gochkov <Me-No-Dev> to support ESP-IDF API
 
 #ifndef _ESP32_HAL_I2C_H_
 #define _ESP32_HAL_I2C_H_
@@ -22,58 +23,16 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/event_groups.h"
+#include <esp_err.h>
 
-// External Wire.h equivalent error Codes
-typedef enum {
-    I2C_ERROR_OK=0,
-    I2C_ERROR_DEV,
-    I2C_ERROR_ACK,
-    I2C_ERROR_TIMEOUT,
-    I2C_ERROR_BUS,
-    I2C_ERROR_BUSY,
-    I2C_ERROR_MEMORY,
-    I2C_ERROR_CONTINUE,
-    I2C_ERROR_NO_BEGIN
-} i2c_err_t;
-
-struct i2c_struct_t;
-typedef struct i2c_struct_t i2c_t;
-
-i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed);
-void i2cRelease(i2c_t *i2c); // free ISR, Free DQ, Power off peripheral clock.  Must call i2cInit() to recover
-i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis);
-i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis, uint32_t *readCount);
-i2c_err_t i2cFlush(i2c_t *i2c);
-i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed);
-uint32_t i2cGetFrequency(i2c_t * i2c);
-uint32_t i2cGetStatus(i2c_t * i2c); // Status register of peripheral
-
-//Functions below should be used only if well understood
-//Might be deprecated and removed in future
-i2c_err_t i2cAttachSCL(i2c_t * i2c, int8_t scl);
-i2c_err_t i2cDetachSCL(i2c_t * i2c, int8_t scl);
-i2c_err_t i2cAttachSDA(i2c_t * i2c, int8_t sda);
-i2c_err_t i2cDetachSDA(i2c_t * i2c, int8_t sda);
-
-//Stickbreakers ISR Support
-i2c_err_t i2cProcQueue(i2c_t *i2c, uint32_t *readCount, uint16_t timeOutMillis);
-i2c_err_t i2cAddQueueWrite(i2c_t *i2c, uint16_t i2cDeviceAddr, uint8_t *dataPtr, uint16_t dataLen, bool SendStop, EventGroupHandle_t event);
-i2c_err_t i2cAddQueueRead(i2c_t *i2c, uint16_t i2cDeviceAddr, uint8_t *dataPtr, uint16_t dataLen, bool SendStop, EventGroupHandle_t event);
-
-//stickbreaker debug support
-uint32_t i2cDebug(i2c_t *, uint32_t setBits, uint32_t resetBits);
-//  Debug actions have 3 currently defined locus 
-// 0xXX------ : at entry of ProcQueue 
-// 0x--XX---- : at exit of ProcQueue
-// 0x------XX : at entry of Flush
-// 
-// bit 0 causes DumpI2c to execute 
-// bit 1 causes DumpInts to execute
-// bit 2 causes DumpCmdqueue to execute
-// bit 3 causes DumpStatus to execute
-// bit 4 causes DumpFifo to execute
+esp_err_t i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed);
+esp_err_t i2cDeinit(uint8_t i2c_num);
+esp_err_t i2cSetClock(uint8_t i2c_num, uint32_t frequency);
+esp_err_t i2cGetClock(uint8_t i2c_num, uint32_t * frequency);
+esp_err_t i2cWrite(uint8_t i2c_num, uint16_t address, const uint8_t* buff, size_t size, uint32_t timeOutMillis);
+esp_err_t i2cRead(uint8_t i2c_num, uint16_t address, uint8_t* buff, size_t size, uint32_t timeOutMillis, size_t *readCount);
+esp_err_t i2cWriteReadNonStop(uint8_t i2c_num, uint16_t address, const uint8_t* wbuff, size_t wsize, uint8_t* rbuff, size_t rsize, uint32_t timeOutMillis, size_t *readCount);
+bool i2cIsInit(uint8_t i2c_num);
 
 #ifdef __cplusplus
 }

cores/esp32/esp32-hal-ledc.c

@@ -17,23 +17,26 @@
 #include "freertos/task.h"
 #include "freertos/semphr.h"
 #include "esp32-hal-matrix.h"
-#include "esp32-hal-log.h"
-#include "soc/dport_reg.h"
+#include "soc/soc_caps.h"
 #include "soc/ledc_reg.h"
 #include "soc/ledc_struct.h"
-#include "esp32-hal-cpu.h"
-#include "esp32-hal-gpio.h"
-#include "esp32-hal-ledc.h"
+#include "driver/periph_ctrl.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "soc/dport_reg.h"
 #include "esp32/rom/ets_sys.h"
 #define LAST_CHAN (15)
 #elif CONFIG_IDF_TARGET_ESP32S2
+#include "soc/dport_reg.h"
 #include "esp32s2/rom/ets_sys.h"
 #define LAST_CHAN (7)
 #define LEDC_DIV_NUM_HSTIMER0_V LEDC_CLK_DIV_LSTIMER0_V
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
+#define LAST_CHAN (7)
+#define LEDC_DIV_NUM_HSTIMER0_V LEDC_CLK_DIV_LSTIMER0_V
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -47,7 +50,7 @@
 #else
 #define LEDC_MUTEX_LOCK()    do {} while (xSemaphoreTake(_ledc_sys_lock, portMAX_DELAY) != pdPASS)
 #define LEDC_MUTEX_UNLOCK()  xSemaphoreGive(_ledc_sys_lock)
-SemaphoreHandle_t _ledc_sys_lock = NULL;
+xSemaphoreHandle _ledc_sys_lock = NULL;
 #endif
 
 /*
@@ -113,10 +116,13 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
     uint8_t group=(chan/8), timer=((chan/2)%4);
     static bool tHasStarted = false;
     static uint16_t _activeChannels = 0;
+#if CONFIG_IDF_TARGET_ESP32S2
+// ESP32-S2 TRM v1.0 on Page 789 -> BIT LEDC_TICK_SEL_TIMERx is 0 for LEDC_PWM_CLK and 1 for REF_TICK
+    apb_clk = 0;        
+#endif
     if(!tHasStarted) {
         tHasStarted = true;
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN);
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
+        periph_module_enable(PERIPH_LEDC_MODULE);
         LEDC.conf.apb_clk_sel = 1;//LS use apb clock
         addApbChangeCallback((void*)&_activeChannels, _on_apb_change);
 
@@ -306,7 +312,7 @@ void ledcAttachPin(uint8_t pin, uint8_t chan)
         return;
     }
     pinMode(pin, OUTPUT);
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     pinMatrixOutAttach(pin, LEDC_LS_SIG_OUT0_IDX + chan, false, false);
 #else
     pinMatrixOutAttach(pin, ((chan/8)?LEDC_LS_SIG_OUT0_IDX:LEDC_HS_SIG_OUT0_IDX) + (chan%8), false, false);
@@ -317,3 +323,30 @@ void ledcDetachPin(uint8_t pin)
 {
     pinMatrixOutDetach(pin, false, false);
 }
+
+double ledcChangeFrequency(uint8_t chan, double freq, uint8_t bit_num)
+{
+    if (chan > 15) {
+        return 0;
+    }
+    double res_freq = _ledcSetupTimerFreq(chan, freq, bit_num);
+    return res_freq;
+}
+
+static int8_t pin_to_channel[SOC_GPIO_PIN_COUNT] = { 0 };
+static int cnt_channel = SOC_LEDC_CHANNEL_NUM;
+void analogWrite(uint8_t pin, int value) {
+  // Use ledc hardware for internal pins
+  if (pin < SOC_GPIO_PIN_COUNT) {
+    if (pin_to_channel[pin] == 0) {
+      if (!cnt_channel) {
+          log_e("No more analogWrite channels available! You can have maximum %u", SOC_LEDC_CHANNEL_NUM);
+          return;
+      }
+      pin_to_channel[pin] = cnt_channel--;
+      ledcAttachPin(pin, cnt_channel);
+      ledcSetup(cnt_channel, 1000, 8);
+    }
+    ledcWrite(pin_to_channel[pin] - 1, value);
+  }
+}

cores/esp32/esp32-hal-ledc.h

@@ -35,6 +35,7 @@ uint32_t    ledcRead(uint8_t channel);
 double      ledcReadFreq(uint8_t channel);
 void        ledcAttachPin(uint8_t pin, uint8_t channel);
 void        ledcDetachPin(uint8_t pin);
+double      ledcChangeFrequency(uint8_t channel, double freq, uint8_t resolution_bits);
 
 
 #ifdef __cplusplus

cores/esp32/esp32-hal-log.h

@@ -21,7 +21,6 @@ extern "C"
 
 #include "sdkconfig.h"
 #include "esp_timer.h"
-#include "esp_log.h"
 
 #define ARDUHAL_LOG_LEVEL_NONE       (0)
 #define ARDUHAL_LOG_LEVEL_ERROR      (1)
@@ -38,6 +37,9 @@ extern "C"
 #define ARDUHAL_LOG_LEVEL CONFIG_ARDUHAL_LOG_DEFAULT_LEVEL
 #else
 #define ARDUHAL_LOG_LEVEL CORE_DEBUG_LEVEL
+#ifdef USE_ESP_IDF_LOG
+#define LOG_LOCAL_LEVEL CORE_DEBUG_LEVEL
+#endif
 #endif
 
 #ifndef CONFIG_ARDUHAL_LOG_COLORS
@@ -64,6 +66,8 @@ extern "C"
 #define ARDUHAL_LOG_COLOR_I       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_GREEN)
 #define ARDUHAL_LOG_COLOR_D       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_CYAN)
 #define ARDUHAL_LOG_COLOR_V       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_GRAY)
+#define ARDUHAL_LOG_COLOR_PRINT(letter) log_printf(ARDUHAL_LOG_COLOR_ ## letter)
+#define ARDUHAL_LOG_COLOR_PRINT_END log_printf(ARDUHAL_LOG_RESET_COLOR)
 #else
 #define ARDUHAL_LOG_COLOR_E
 #define ARDUHAL_LOG_COLOR_W
@@ -71,62 +75,146 @@ extern "C"
 #define ARDUHAL_LOG_COLOR_D
 #define ARDUHAL_LOG_COLOR_V
 #define ARDUHAL_LOG_RESET_COLOR
+#define ARDUHAL_LOG_COLOR_PRINT(letter)
+#define ARDUHAL_LOG_COLOR_PRINT_END
 #endif
 
-#if CONFIG_LOG_LOCATION
-#define ARDUHAL_LOG_FORMAT(letter, format) format
-#else
-#define ARDUHAL_LOG_FORMAT(letter, format)  "[%s:%u] %s(): " format, (__builtin_strrchr(__FILE__, '/') ? __builtin_strrchr(__FILE__, '/') + 1 : __FILE__), __LINE__, __FUNCTION__
-#endif
 
-#define ARDUHAL_LOG_TAG "ARDUINO"
+
+const char * pathToFileName(const char * path);
+int log_printf(const char *fmt, ...);
+void log_print_buf(const uint8_t *b, size_t len);
+
+#define ARDUHAL_SHORT_LOG_FORMAT(letter, format)  ARDUHAL_LOG_COLOR_ ## letter format ARDUHAL_LOG_RESET_COLOR "\r\n"
+#define ARDUHAL_LOG_FORMAT(letter, format)  ARDUHAL_LOG_COLOR_ ## letter "[%6u][" #letter "][%s:%u] %s(): " format ARDUHAL_LOG_RESET_COLOR "\r\n", (unsigned long) (esp_timer_get_time() / 1000ULL), pathToFileName(__FILE__), __LINE__, __FUNCTION__
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_VERBOSE
-#define log_v(format, ...) ESP_LOGV(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
-#define isr_log_v(format, ...) ESP_LOGV(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_v(format, ...) log_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
+#define isr_log_v(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
+#define log_buf_v(b,l) do{ARDUHAL_LOG_COLOR_PRINT(V);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_v(format, ...)
-#define isr_log_v(format, ...)
+#define log_v(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_VERBOSE, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_v(format, ...) do {ets_printf(LOG_FORMAT(V, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_v(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_VERBOSE);}while(0)
+#endif
+#else
+#define log_v(format, ...)  do {} while(0)
+#define isr_log_v(format, ...)  do {} while(0)
+#define log_buf_v(b,l)  do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_DEBUG
-#define log_d(format, ...) ESP_LOGD(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
-#define isr_log_d(format, ...) ESP_LOGD(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_d(format, ...) log_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
+#define isr_log_d(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
+#define log_buf_d(b,l) do{ARDUHAL_LOG_COLOR_PRINT(D);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_d(format, ...)
-#define isr_log_d(format, ...)
+#define log_d(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_DEBUG, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_d(format, ...) do {ets_printf(LOG_FORMAT(D, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_d(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_DEBUG);}while(0)
+#endif
+#else
+#define log_d(format, ...)  do {} while(0)
+#define isr_log_d(format, ...) do {} while(0)
+#define log_buf_d(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO
-#define log_i(format, ...) ESP_LOGI(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
-#define isr_log_i(format, ...) ESP_LOGI(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_i(format, ...) log_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
+#define isr_log_i(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
+#define log_buf_i(b,l) do{ARDUHAL_LOG_COLOR_PRINT(I);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_i(format, ...)
-#define isr_log_i(format, ...)
+#define log_i(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_INFO, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_i(format, ...) do {ets_printf(LOG_FORMAT(I, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_i(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_INFO);}while(0)
+#endif
+#else
+#define log_i(format, ...) do {} while(0)
+#define isr_log_i(format, ...) do {} while(0)
+#define log_buf_i(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_WARN
-#define log_w(format, ...) ESP_LOGW(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
-#define isr_log_w(format, ...) ESP_LOGW(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_w(format, ...) log_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
+#define isr_log_w(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
+#define log_buf_w(b,l) do{ARDUHAL_LOG_COLOR_PRINT(W);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_w(format, ...)
-#define isr_log_w(format, ...)
+#define log_w(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_WARN, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_w(format, ...) do {ets_printf(LOG_FORMAT(W, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_w(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_WARN);}while(0)
+#endif
+#else
+#define log_w(format, ...) do {} while(0)
+#define isr_log_w(format, ...) do {} while(0)
+#define log_buf_w(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR
-#define log_e(format, ...) ESP_LOGE(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
-#define isr_log_e(format, ...) ESP_LOGE(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_e(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define isr_log_e(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define log_buf_e(b,l) do{ARDUHAL_LOG_COLOR_PRINT(E);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_e(format, ...)
-#define isr_log_e(format, ...)
+#define log_e(format, ...) do {log_to_esp(TAG, ESP_LOG_ERROR, format, ##__VA_ARGS__);}while(0)
+#define isr_log_e(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_e(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_ERROR);}while(0)
+#endif
+#else
+#define log_e(format, ...) do {} while(0)
+#define isr_log_e(format, ...) do {} while(0)
+#define log_buf_e(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_NONE
-#define log_n(format, ...) ESP_LOGE(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
-#define isr_log_n(format, ...) ESP_LOGE(ARDUHAL_LOG_TAG, ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#ifndef USE_ESP_IDF_LOG
+#define log_n(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define isr_log_n(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define log_buf_n(b,l) do{ARDUHAL_LOG_COLOR_PRINT(E);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_n(format, ...)
-#define isr_log_n(format, ...)
+#define log_n(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_ERROR, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_n(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_n(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_ERROR);}while(0)
+#endif
+#else
+#define log_n(format, ...) do {} while(0)
+#define isr_log_n(format, ...) do {} while(0)
+#define log_buf_n(b,l) do {} while(0)
+#endif
+
+#include "esp_log.h"
+
+#ifdef USE_ESP_IDF_LOG
+#ifndef TAG
+#define TAG "ARDUINO"
+#endif
+//#define log_n(format, ...) myLog(ESP_LOG_NONE, format, ##__VA_ARGS__)
+#else
+#ifdef CONFIG_ARDUHAL_ESP_LOG
+#undef ESP_LOGE
+#undef ESP_LOGW
+#undef ESP_LOGI
+#undef ESP_LOGD
+#undef ESP_LOGV
+#undef ESP_EARLY_LOGE
+#undef ESP_EARLY_LOGW
+#undef ESP_EARLY_LOGI
+#undef ESP_EARLY_LOGD
+#undef ESP_EARLY_LOGV
+
+#define ESP_LOGE(tag, ...)  log_e(__VA_ARGS__)
+#define ESP_LOGW(tag, ...)  log_w(__VA_ARGS__)
+#define ESP_LOGI(tag, ...)  log_i(__VA_ARGS__)
+#define ESP_LOGD(tag, ...)  log_d(__VA_ARGS__)
+#define ESP_LOGV(tag, ...)  log_v(__VA_ARGS__)
+#define ESP_EARLY_LOGE(tag, ...)  isr_log_e(__VA_ARGS__)
+#define ESP_EARLY_LOGW(tag, ...)  isr_log_w(__VA_ARGS__)
+#define ESP_EARLY_LOGI(tag, ...)  isr_log_i(__VA_ARGS__)
+#define ESP_EARLY_LOGD(tag, ...)  isr_log_d(__VA_ARGS__)
+#define ESP_EARLY_LOGV(tag, ...)  isr_log_v(__VA_ARGS__)
+#endif
 #endif
 
 #ifdef __cplusplus

cores/esp32/esp32-hal-matrix.c

@@ -14,7 +14,6 @@
 
 #include "esp32-hal-matrix.h"
 #include "esp_attr.h"
-#include "esp32-hal.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
@@ -22,6 +21,8 @@
 #include "esp32/rom/gpio.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/rom/gpio.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/gpio.h"
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif

cores/esp32/esp32-hal-matrix.h

@@ -20,8 +20,7 @@
 extern "C" {
 #endif
 
-#include <stdint.h>
-#include <stdbool.h>
+#include "esp32-hal.h"
 #include "soc/gpio_sig_map.h"
 
 void pinMatrixOutAttach(uint8_t pin, uint8_t function, bool invertOut, bool invertEnable);

cores/esp32/esp32-hal-misc.c

@@ -13,8 +13,6 @@
 // limitations under the License.
 
 #include "sdkconfig.h"
-#include "esp32-hal-misc.h"
-#include "esp32-hal.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_attr.h"
@@ -23,6 +21,9 @@
 #include "esp_partition.h"
 #include "esp_log.h"
 #include "esp_timer.h"
+#ifdef CONFIG_APP_ROLLBACK_ENABLE
+#include "esp_ota_ops.h"
+#endif //CONFIG_APP_ROLLBACK_ENABLE
 #ifdef CONFIG_BT_ENABLED
 #include "esp_bt.h"
 #endif //CONFIG_BT_ENABLED
@@ -31,6 +32,7 @@
 #include "soc/rtc_cntl_reg.h"
 #include "soc/apb_ctrl_reg.h"
 #include "esp_task_wdt.h"
+#include "esp32-hal.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
@@ -38,6 +40,10 @@
 #include "esp32/rom/rtc.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/rom/rtc.h"
+#include "driver/temp_sensor.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/rtc.h"
+#include "driver/temp_sensor.h"
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -47,12 +53,25 @@
 
 //Undocumented!!! Get chip temperature in Farenheit
 //Source: https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_int_temp_sensor/ESP32_int_temp_sensor.ino
+#ifdef CONFIG_IDF_TARGET_ESP32
 uint8_t temprature_sens_read();
 
 float temperatureRead()
 {
     return (temprature_sens_read() - 32) / 1.8;
 }
+#else
+float temperatureRead()
+{
+    float result = NAN;
+    temp_sensor_config_t tsens = TSENS_CONFIG_DEFAULT();
+    temp_sensor_set_config(tsens);
+    temp_sensor_start();
+    temp_sensor_read_celsius(&result); 
+    temp_sensor_stop();
+    return result;
+}
+#endif
 
 void __yield()
 {
@@ -61,24 +80,194 @@ void __yield()
 
 void yield() __attribute__ ((weak, alias("__yield")));
 
+#if CONFIG_AUTOSTART_ARDUINO
+
+extern TaskHandle_t loopTaskHandle;
+extern bool loopTaskWDTEnabled;
+
+void enableLoopWDT(){
+    if(loopTaskHandle != NULL){
+        if(esp_task_wdt_add(loopTaskHandle) != ESP_OK){
+            log_e("Failed to add loop task to WDT");
+        } else {
+            loopTaskWDTEnabled = true;
+        }
+    }
+}
+
+void disableLoopWDT(){
+    if(loopTaskHandle != NULL && loopTaskWDTEnabled){
+        loopTaskWDTEnabled = false;
+        if(esp_task_wdt_delete(loopTaskHandle) != ESP_OK){
+            log_e("Failed to remove loop task from WDT");
+        }
+    }
+}
+
+void feedLoopWDT(){
+    esp_err_t err = esp_task_wdt_reset();
+    if(err != ESP_OK){
+        log_e("Failed to feed WDT! Error: %d", err);
+    }
+}
+#endif
+
+void enableCore0WDT(){
+    TaskHandle_t idle_0 = xTaskGetIdleTaskHandleForCPU(0);
+    if(idle_0 == NULL || esp_task_wdt_add(idle_0) != ESP_OK){
+        log_e("Failed to add Core 0 IDLE task to WDT");
+    }
+}
+
+void disableCore0WDT(){
+    TaskHandle_t idle_0 = xTaskGetIdleTaskHandleForCPU(0);
+    if(idle_0 == NULL || esp_task_wdt_delete(idle_0) != ESP_OK){
+        log_e("Failed to remove Core 0 IDLE task from WDT");
+    }
+}
+
+#ifndef CONFIG_FREERTOS_UNICORE
+void enableCore1WDT(){
+    TaskHandle_t idle_1 = xTaskGetIdleTaskHandleForCPU(1);
+    if(idle_1 == NULL || esp_task_wdt_add(idle_1) != ESP_OK){
+        log_e("Failed to add Core 1 IDLE task to WDT");
+    }
+}
+
+void disableCore1WDT(){
+    TaskHandle_t idle_1 = xTaskGetIdleTaskHandleForCPU(1);
+    if(idle_1 == NULL || esp_task_wdt_delete(idle_1) != ESP_OK){
+        log_e("Failed to remove Core 1 IDLE task from WDT");
+    }
+}
+#endif
+
+BaseType_t xTaskCreateUniversal( TaskFunction_t pxTaskCode,
+                        const char * const pcName,
+                        const uint32_t usStackDepth,
+                        void * const pvParameters,
+                        UBaseType_t uxPriority,
+                        TaskHandle_t * const pxCreatedTask,
+                        const BaseType_t xCoreID ){
+#ifndef CONFIG_FREERTOS_UNICORE
+    if(xCoreID >= 0 && xCoreID < 2) {
+        return xTaskCreatePinnedToCore(pxTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask, xCoreID);
+    } else {
+#endif
+    return xTaskCreate(pxTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask);
+#ifndef CONFIG_FREERTOS_UNICORE
+    }
+#endif
+}
+
 unsigned long ARDUINO_ISR_ATTR micros()
 {
     return (unsigned long) (esp_timer_get_time());
 }
 
+unsigned long ARDUINO_ISR_ATTR millis()
+{
+    return (unsigned long) (esp_timer_get_time() / 1000ULL);
+}
+
+void delay(uint32_t ms)
+{
+    vTaskDelay(ms / portTICK_PERIOD_MS);
+}
+
 void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us)
 {
-    uint32_t m = micros();
+    uint64_t m = (uint64_t)esp_timer_get_time();
     if(us){
-        uint32_t e = (m + us);
+        uint64_t e = (m + us);
         if(m > e){ //overflow
-            while(micros() > e){
+            while((uint64_t)esp_timer_get_time() > e){
                 NOP();
             }
         }
-        while(micros() < e){
+        while((uint64_t)esp_timer_get_time() < e){
             NOP();
         }
     }
 }
 
+void initVariant() __attribute__((weak));
+void initVariant() {}
+
+void init() __attribute__((weak));
+void init() {}
+
+bool verifyOta() __attribute__((weak));
+bool verifyOta() { return true; }
+
+#ifdef CONFIG_BT_ENABLED
+//overwritten in esp32-hal-bt.c
+bool btInUse() __attribute__((weak));
+bool btInUse(){ return false; }
+#endif
+
+void initArduino()
+{
+#ifdef CONFIG_APP_ROLLBACK_ENABLE
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    esp_ota_img_states_t ota_state;
+    if (esp_ota_get_state_partition(running, &ota_state) == ESP_OK) {
+        if (ota_state == ESP_OTA_IMG_PENDING_VERIFY) {
+            if (verifyOta()) {
+                esp_ota_mark_app_valid_cancel_rollback();
+            } else {
+                log_e("OTA verification failed! Start rollback to the previous version ...");
+                esp_ota_mark_app_invalid_rollback_and_reboot();
+            }
+        }
+    }
+#endif
+    //init proper ref tick value for PLL (uncomment if REF_TICK is different than 1MHz)
+    //ESP_REG(APB_CTRL_PLL_TICK_CONF_REG) = APB_CLK_FREQ / REF_CLK_FREQ - 1;
+#ifdef F_CPU
+    setCpuFrequencyMhz(F_CPU/1000000);
+#endif
+#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
+    psramInit();
+#endif
+    esp_log_level_set("*", CONFIG_LOG_DEFAULT_LEVEL);
+    esp_err_t err = nvs_flash_init();
+    if(err == ESP_ERR_NVS_NO_FREE_PAGES){
+        const esp_partition_t* partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, NULL);
+        if (partition != NULL) {
+            err = esp_partition_erase_range(partition, 0, partition->size);
+            if(!err){
+                err = nvs_flash_init();
+            } else {
+                log_e("Failed to format the broken NVS partition!");
+            }
+        }
+    }
+    if(err) {
+        log_e("Failed to initialize NVS! Error: %u", err);
+    }
+#ifdef CONFIG_BT_ENABLED
+    if(!btInUse()){
+        esp_bt_controller_mem_release(ESP_BT_MODE_BTDM);
+    }
+#endif
+    init();
+    initVariant();
+}
+
+//used by hal log
+const char * ARDUINO_ISR_ATTR pathToFileName(const char * path)
+{
+    size_t i = 0;
+    size_t pos = 0;
+    char * p = (char *)path;
+    while(*p){
+        i++;
+        if(*p == '/' || *p == '\\'){
+            pos = i;
+        }
+        p++;
+    }
+    return path+pos;
+}
+

cores/esp32/esp32-hal-misc.h

@@ -1,16 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void yield(void);
-
-unsigned long micros();
-void delayMicroseconds(uint32_t us);
-
-#ifdef __cplusplus
-}
-#endif

cores/esp32/esp32-hal-psram.c

@@ -14,9 +14,6 @@
 
 #include "esp32-hal.h"
 
-#include <stdbool.h>
-#include <stddef.h>
-
 #if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
 #include "soc/efuse_reg.h"
 #include "esp_heap_caps.h"

cores/esp32/esp32-hal-rmt.c

@@ -17,35 +17,38 @@
 #include "freertos/semphr.h"
 
 #include "esp32-hal.h"
-#include "esp32-hal-log.h"
 #include "esp8266-compat.h"
 #include "soc/gpio_reg.h"
 #include "soc/rmt_struct.h"
-#include <esp_private/periph_ctrl.h>
+#include "driver/periph_ctrl.h"
 #include "esp_intr_alloc.h"
-#include "hal/rmt_ll.h"
-#include "driver/rmt.h"
-#include "esp32-hal-rmt.h"
-#include "esp32-hal-gpio.h"
-#include "esp32-hal-matrix.h"
-
-// RMTMEM address is declared in <target>.peripherals.ld
-extern rmt_mem_t RMTMEM;
 
 /**
  * Internal macros
  */
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
 #define MAX_CHANNELS 8
+#define MAX_DATA_PER_CHANNEL 64
+#define MAX_DATA_PER_ITTERATION 62
 #elif CONFIG_IDF_TARGET_ESP32S2
 #define MAX_CHANNELS 4
+#define MAX_DATA_PER_CHANNEL 64
+#define MAX_DATA_PER_ITTERATION 62
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define MAX_CHANNELS 4
+#define MAX_DATA_PER_CHANNEL 48
+#define MAX_DATA_PER_ITTERATION 46
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
-#define MAX_DATA_PER_CHANNEL 64
-#define MAX_DATA_PER_ITTERATION 62
 #define _ABS(a) (a>0?a:-a)
 #define _LIMIT(a,b) (a>b?b:a)
+#if CONFIG_IDF_TARGET_ESP32C3
+#define _INT_TX_END(channel) (1<<(channel))
+#define _INT_RX_END(channel) (4<<(channel))
+#define _INT_ERROR(channel)  (16<<(channel))
+#define _INT_THR_EVNT(channel)  (256<<(channel))
+#else
 #define __INT_TX_END     (1)
 #define __INT_RX_END     (2)
 #define __INT_ERROR      (4)
@@ -55,6 +58,7 @@ extern rmt_mem_t RMTMEM;
 #define _INT_RX_END(channel) (__INT_RX_END<<(channel*3))
 #define _INT_ERROR(channel)  (__INT_ERROR<<(channel*3))
 #define _INT_THR_EVNT(channel)  ((__INT_THR_EVNT)<<(channel))
+#endif
 
 #if CONFIG_DISABLE_HAL_LOCKS
 # define RMT_MUTEX_LOCK(channel)
@@ -64,7 +68,7 @@ extern rmt_mem_t RMTMEM;
 # define RMT_MUTEX_UNLOCK(channel)  xSemaphoreGive(g_rmt_objlocks[channel])
 #endif /* CONFIG_DISABLE_HAL_LOCKS */
 
-#define _RMT_INTERNAL_DEBUG
+//#define _RMT_INTERNAL_DEBUG
 #ifdef _RMT_INTERNAL_DEBUG
 # define DEBUG_INTERRUPT_START(pin)    digitalWrite(pin, 1);
 # define DEBUG_INTERRUPT_END(pin)      digitalWrite(pin, 0);
@@ -111,7 +115,7 @@ struct rmt_obj_s
 /**
  * Internal variables for channel descriptors
  */
-static SemaphoreHandle_t g_rmt_objlocks[MAX_CHANNELS] = {
+static xSemaphoreHandle g_rmt_objlocks[MAX_CHANNELS] = {
     NULL, NULL, NULL, NULL, 
 #if CONFIG_IDF_TARGET_ESP32
     NULL, NULL, NULL, NULL
@@ -138,7 +142,7 @@ static  intr_handle_t intr_handle;
 
 static bool periph_enabled = false;
 
-static SemaphoreHandle_t g_rmt_block_lock = NULL;
+static xSemaphoreHandle g_rmt_block_lock = NULL;
 
 /**
  * Internal method (private) declarations
@@ -171,12 +175,17 @@ bool rmtSetCarrier(rmt_obj_t* rmt, bool carrier_en, bool carrier_level, uint32_t
     size_t channel = rmt->channel;
 
     RMT_MUTEX_LOCK(channel);
-
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.tx_carrier[channel].low = low;
+    RMT.tx_carrier[channel].high = high;
+    RMT.rx_conf[channel].conf0.carrier_en = carrier_en;
+    RMT.rx_conf[channel].conf0.carrier_out_lv = carrier_level;
+#else
     RMT.carrier_duty_ch[channel].low = low;
     RMT.carrier_duty_ch[channel].high = high;
     RMT.conf_ch[channel].conf0.carrier_en = carrier_en;
     RMT.conf_ch[channel].conf0.carrier_out_lv = carrier_level;
-
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     return true;
@@ -192,8 +201,13 @@ bool rmtSetFilter(rmt_obj_t* rmt, bool filter_en, uint32_t filter_level)
 
     RMT_MUTEX_LOCK(channel);
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.rx_filter_thres = filter_level;
+    RMT.rx_conf[channel].conf1.rx_filter_en = filter_en;
+#else
     RMT.conf_ch[channel].conf1.rx_filter_thres = filter_level;
     RMT.conf_ch[channel].conf1.rx_filter_en = filter_en;
+#endif
 
     RMT_MUTEX_UNLOCK(channel);
 
@@ -209,7 +223,11 @@ bool rmtSetRxThreshold(rmt_obj_t* rmt, uint32_t value)
     size_t channel = rmt->channel;
 
     RMT_MUTEX_LOCK(channel);
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf0.idle_thres = value;
+#else
     RMT.conf_ch[channel].conf0.idle_thres = value;
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     return true;
@@ -274,7 +292,7 @@ bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
     int channel = rmt->channel;
     int allocated_size = MAX_DATA_PER_CHANNEL * rmt->buffers;
 
-    if (size > allocated_size) {
+    if (size > (allocated_size - 1)) {
 
         int half_tx_nr = MAX_DATA_PER_ITTERATION/2;
         RMT_MUTEX_LOCK(channel);
@@ -288,6 +306,18 @@ bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
         rmt->intr_mode = E_TX_INTR | E_TXTHR_INTR;
         rmt->tx_state = E_SET_CONTI | E_FIRST_HALF;
 
+#if CONFIG_IDF_TARGET_ESP32C3
+        //uint32_t val = RMT.tx_conf[channel].val;
+        // init the tx limit for interruption
+        RMT.tx_lim[channel].limit = half_tx_nr+2;
+        //RMT.tx_conf[channel].val = val;
+        //RMT.tx_conf[channel].conf_update = 1;
+        // reset memory pointer
+        RMT.tx_conf[channel].mem_rst = 1;
+        //RMT.tx_conf[channel].mem_rst = 0;
+        RMT.tx_conf[channel].mem_rd_rst = 1;
+        //RMT.tx_conf[channel].mem_rd_rst = 0;
+#else
         // init the tx limit for interruption
         RMT.tx_lim_ch[channel].limit = half_tx_nr+2;
         // reset memory pointer
@@ -297,9 +327,9 @@ bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
         RMT.conf_ch[channel].conf1.mem_rd_rst = 0;
         RMT.conf_ch[channel].conf1.mem_wr_rst = 1;
         RMT.conf_ch[channel].conf1.mem_wr_rst = 0;
-
+#endif
         // set the tx end mark
-        RMTMEM.chan[channel].data32[MAX_DATA_PER_ITTERATION].val = 0;
+        //RMTMEM.chan[channel].data32[MAX_DATA_PER_ITTERATION].val = 0;
 
         // clear and enable both Tx completed and half tx event
         RMT.int_clr.val = _INT_TX_END(channel);
@@ -313,6 +343,7 @@ bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
         RMT_MUTEX_UNLOCK(channel);
 
         // start the transation
+        //return _rmtSendOnce(rmt, data, MAX_DATA_PER_ITTERATION, true);
         return _rmtSendOnce(rmt, data, MAX_DATA_PER_ITTERATION, false);
     } else {
         // use one-go mode if data fits one buffer 
@@ -351,10 +382,15 @@ bool rmtBeginReceive(rmt_obj_t* rmt)
     RMT.int_clr.val = _INT_ERROR(channel);
     RMT.int_ena.val |= _INT_ERROR(channel);
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.mem_owner = 1;
+    RMT.rx_conf[channel].conf1.mem_wr_rst = 1;
+    RMT.rx_conf[channel].conf1.rx_en = 1;
+#else
     RMT.conf_ch[channel].conf1.mem_owner = 1;
     RMT.conf_ch[channel].conf1.mem_wr_rst = 1;
     RMT.conf_ch[channel].conf1.rx_en = 1;
-
+#endif
     return true;
 }
 
@@ -393,17 +429,26 @@ bool rmtRead(rmt_obj_t* rmt, rmt_rx_data_cb_t cb, void * arg)
         rmt->data_alloc = true;
     }
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.mem_owner = 1;
+#else
     RMT.conf_ch[channel].conf1.mem_owner = 1;
-
+#endif
     RMT.int_clr.val = _INT_RX_END(channel);
     RMT.int_clr.val = _INT_ERROR(channel);
     
     RMT.int_ena.val |= _INT_RX_END(channel);
     RMT.int_ena.val |= _INT_ERROR(channel);
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.mem_wr_rst = 1;
+
+    RMT.rx_conf[channel].conf1.rx_en = 1;
+#else
     RMT.conf_ch[channel].conf1.mem_wr_rst = 1;
 
     RMT.conf_ch[channel].conf1.rx_en = 1;
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     return true;
@@ -416,7 +461,11 @@ bool rmtEnd(rmt_obj_t* rmt) {
     int channel = rmt->channel;
 
     RMT_MUTEX_LOCK(channel);
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.rx_en = 1;
+#else
     RMT.conf_ch[channel].conf1.rx_en = 1;
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     return  true;
@@ -446,7 +495,11 @@ bool rmtReadAsync(rmt_obj_t* rmt, rmt_data_t* data, size_t size, void* eventFlag
     RMT_MUTEX_LOCK(channel);
     rmt->intr_mode = E_RX_INTR;
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.mem_owner = 1;
+#else
     RMT.conf_ch[channel].conf1.mem_owner = 1;
+#endif
 
     RMT.int_clr.val = _INT_RX_END(channel);
     RMT.int_clr.val = _INT_ERROR(channel);
@@ -454,9 +507,15 @@ bool rmtReadAsync(rmt_obj_t* rmt, rmt_data_t* data, size_t size, void* eventFlag
     RMT.int_ena.val |= _INT_RX_END(channel);
     RMT.int_ena.val |= _INT_ERROR(channel);
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.rx_conf[channel].conf1.mem_wr_rst = 1;
+
+    RMT.rx_conf[channel].conf1.rx_en = 1;
+#else
     RMT.conf_ch[channel].conf1.mem_wr_rst = 1;
 
     RMT.conf_ch[channel].conf1.rx_en = 1;
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     // wait for data if requested so
@@ -483,14 +542,20 @@ float rmtSetTick(rmt_obj_t* rmt, float tick)
      * rmt tick for 1 MHz  -> 1us (1x)        div_cnt = 0x01
                               256us (256x)    div_cnt = 0x00
     */
-    int apb_div = _LIMIT(tick/12.5, 256);
-    int ref_div = _LIMIT(tick/1000, 256);
-
-    float apb_tick = 12.5 * apb_div;
-    float ref_tick = 1000.0 * ref_div;
     
     size_t channel = rmt->channel;
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    int apb_div = _LIMIT(tick/25.0f, 256);
+    float apb_tick = 25.0f * apb_div;
+    RMT.tx_conf[channel].div_cnt = apb_div & 0xFF;
+    RMT.tx_conf[channel].conf_update = 1;
+    return apb_tick;
+#else
+    int apb_div = _LIMIT(tick/12.5f, 256);
+    int ref_div = _LIMIT(tick/1000, 256);
+    float apb_tick = 12.5f * apb_div;
+    float ref_tick = 1000.0f * ref_div;
     if (_ABS(apb_tick - tick) < _ABS(ref_tick - tick)) {
         RMT.conf_ch[channel].conf0.div_cnt = apb_div & 0xFF;
         RMT.conf_ch[channel].conf1.ref_always_on = 1;
@@ -500,6 +565,7 @@ float rmtSetTick(rmt_obj_t* rmt, float tick)
         RMT.conf_ch[channel].conf1.ref_always_on = 0;
         return ref_tick;
     }
+#endif
 }
 
 rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
@@ -562,6 +628,47 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
     // - no carrier, filter
     // - timebase tick of 1us
     // - idle threshold set to 0x8000 (max pulse width + 1)
+#if CONFIG_IDF_TARGET_ESP32C3
+
+    RMT.sys_conf.fifo_mask = 1;
+
+    if (tx_not_rx) {
+    	RMT.tx_lim[channel].limit = MAX_DATA_PER_ITTERATION/2 + 2;
+    	RMT.tx_conf[channel].val = 0;
+//        RMT.tx_conf[channel].carrier_en = 0;
+//        RMT.tx_conf[channel].carrier_out_lv = 0;
+//        RMT.tx_conf[channel].tx_conti_mode = 0;
+//        RMT.tx_conf[channel].idle_out_lv = 0;     // signal level for idle
+//        RMT.tx_conf[channel].tx_start = 0;
+//        RMT.tx_conf[channel].tx_stop = 0;
+//        RMT.tx_conf[channel].carrier_eff_en = 0;
+//        RMT.tx_conf[channel].afifo_rst = 0;
+//        RMT.tx_conf[channel].conf_update = 0;
+//        RMT.tx_conf[channel].mem_tx_wrap_en = 0;
+//        RMT.tx_conf[channel].mem_rst = 1;
+
+        RMT.tx_conf[channel].idle_out_en = 1;     // enable idle
+        RMT.tx_conf[channel].div_cnt = 1;
+        RMT.tx_conf[channel].mem_size = buffers;
+        RMT.tx_conf[channel].mem_rd_rst = 1;
+        RMT.tx_conf[channel].conf_update = 1;
+    } else {
+        RMT.rx_conf[channel].conf0.div_cnt = 1;
+        RMT.rx_conf[channel].conf0.mem_size = buffers;
+        RMT.rx_conf[channel].conf0.carrier_en = 0;
+        RMT.rx_conf[channel].conf0.carrier_out_lv = 0;
+        RMT.rx_conf[channel].conf0.idle_thres = 0x80;
+        RMT.rx_conf[channel].conf1.rx_filter_en = 0;
+        RMT.rx_conf[channel].conf1.rx_filter_thres = 0;
+        RMT.rx_conf[channel].conf1.mem_rst = 0;
+        RMT.rx_conf[channel].conf1.mem_rx_wrap_en = 0;
+        RMT.rx_conf[channel].conf1.afifo_rst = 0;
+        RMT.rx_conf[channel].conf1.conf_update = 0;
+        RMT.rx_conf[channel].conf1.rx_en = 1;
+        RMT.rx_conf[channel].conf1.mem_owner = 1;
+        RMT.rx_conf[channel].conf1.mem_wr_rst = 1;
+    }
+#else
     RMT.conf_ch[channel].conf0.div_cnt = 1;
     RMT.conf_ch[channel].conf0.mem_size = buffers;
     RMT.conf_ch[channel].conf0.carrier_en = 0;
@@ -594,7 +701,7 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
         RMT.conf_ch[channel].conf1.mem_owner = 1;
         RMT.conf_ch[channel].conf1.mem_wr_rst = 1;
     }
-
+#endif
     // install interrupt if at least one channel is active
     if (!intr_handle) {
         esp_intr_alloc(ETS_RMT_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, _rmt_isr, NULL, &intr_handle);
@@ -613,7 +720,11 @@ bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size, bool continuous
         return false;
     }
     int channel = rmt->channel;
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.sys_conf.fifo_mask = 1;
+#else
     RMT.apb_conf.fifo_mask = 1;
+#endif
     if (data && size>0) {
         size_t i;
         volatile uint32_t* rmt_mem_ptr = &(RMTMEM.chan[channel].data32[0].val);
@@ -625,9 +736,15 @@ bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size, bool continuous
     }
 
     RMT_MUTEX_LOCK(channel);
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.tx_conf[channel].tx_conti_mode = continuous;
+    RMT.tx_conf[channel].mem_rd_rst = 1;
+    RMT.tx_conf[channel].tx_start = 1;
+#else
     RMT.conf_ch[channel].conf1.tx_conti_mode = continuous;
     RMT.conf_ch[channel].conf1.mem_rd_rst = 1;
     RMT.conf_ch[channel].conf1.tx_start = 1;
+#endif
     RMT_MUTEX_UNLOCK(channel);
 
     return true;
@@ -652,6 +769,7 @@ static void _initPin(int pin, int channel, bool tx_not_rx)
 {
     if (!periph_enabled) {
         periph_enabled = true;
+        periph_module_reset( PERIPH_RMT_MODULE );
         periph_module_enable( PERIPH_RMT_MODULE );
     }
     if (tx_not_rx) {
@@ -667,6 +785,7 @@ static void _initPin(int pin, int channel, bool tx_not_rx)
 
 static void ARDUINO_ISR_ATTR _rmt_isr(void* arg)
 {
+	//DEBUG_INTERRUPT_START(4);
     int intr_val = RMT.int_st.val;
     size_t ch;
     for (ch = 0; ch < MAX_CHANNELS; ch++) {
@@ -701,9 +820,15 @@ static void ARDUINO_ISR_ATTR _rmt_isr(void* arg)
                         (g_rmt_objects[ch].cb)(data_received, _rmt_get_mem_len(ch), g_rmt_objects[ch].arg);
 
                         // restart the reception
+#if CONFIG_IDF_TARGET_ESP32C3
+                        RMT.rx_conf[ch].conf1.mem_owner = 1;
+                        RMT.rx_conf[ch].conf1.mem_wr_rst = 1;
+                        RMT.rx_conf[ch].conf1.rx_en = 1;
+#else
                         RMT.conf_ch[ch].conf1.mem_owner = 1;
                         RMT.conf_ch[ch].conf1.mem_wr_rst = 1;
                         RMT.conf_ch[ch].conf1.rx_en = 1;
+#endif
                         RMT.int_ena.val |= _INT_RX_END(ch);
                     } else {
                         // if not callback provide, expect only one Rx
@@ -729,10 +854,17 @@ static void ARDUINO_ISR_ATTR _rmt_isr(void* arg)
                 xEventGroupSetBits(g_rmt_objects[ch].events, RMT_FLAG_ERROR);
             }
             // reset memory
+#if CONFIG_IDF_TARGET_ESP32C3
+            RMT.tx_conf[ch].mem_rd_rst = 1;
+            RMT.tx_conf[ch].mem_rd_rst = 0;
+            RMT.rx_conf[ch].conf1.mem_wr_rst = 1;
+            RMT.rx_conf[ch].conf1.mem_wr_rst = 0;
+#else
             RMT.conf_ch[ch].conf1.mem_rd_rst = 1;
             RMT.conf_ch[ch].conf1.mem_rd_rst = 0;
             RMT.conf_ch[ch].conf1.mem_wr_rst = 1;
             RMT.conf_ch[ch].conf1.mem_wr_rst = 0;
+#endif
         }
 
         if (intr_val & _INT_TX_END(ch)) {
@@ -744,15 +876,24 @@ static void ARDUINO_ISR_ATTR _rmt_isr(void* arg)
         if (intr_val & _INT_THR_EVNT(ch)) {
             // clear the flag
             RMT.int_clr.val = _INT_THR_EVNT(ch);
+#if CONFIG_IDF_TARGET_ESP32C3
+            //RMT.int_clr.val = _INT_TX_END(ch);
+            //RMT.int_ena.val |= _INT_TX_END(ch);
+#endif
 
             // initial setup of continuous mode
             if (g_rmt_objects[ch].tx_state & E_SET_CONTI) {
+#if CONFIG_IDF_TARGET_ESP32C3
+                RMT.tx_conf[ch].tx_conti_mode = 1;
+#else
                 RMT.conf_ch[ch].conf1.tx_conti_mode = 1;
+#endif
                 g_rmt_objects[ch].intr_mode &= ~E_SET_CONTI;
             }
             _rmt_tx_mem_first(ch);
         }
     }
+    //DEBUG_INTERRUPT_END(4);
 }
 
 static void ARDUINO_ISR_ATTR _rmt_tx_mem_second(uint8_t ch)
@@ -762,14 +903,23 @@ static void ARDUINO_ISR_ATTR _rmt_tx_mem_second(uint8_t ch)
     int half_tx_nr = MAX_DATA_PER_ITTERATION/2;
     int i;
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.tx_lim[ch].limit = half_tx_nr+2;
+#else
     RMT.tx_lim_ch[ch].limit = half_tx_nr+2;
+#endif
     RMT.int_clr.val = _INT_THR_EVNT(ch);
     RMT.int_ena.val |= _INT_THR_EVNT(ch);
+#if CONFIG_IDF_TARGET_ESP32C3
+    //RMT.int_clr.val = _INT_TX_END(ch);
+    //RMT.int_ena.val &= ~_INT_TX_END(ch);
+#endif
 
     g_rmt_objects[ch].tx_state |= E_FIRST_HALF;
 
     if (data) {
         int remaining_size = g_rmt_objects[ch].data_size;
+        //ets_printf("RMT Tx[%d] %d\n", ch, remaining_size);
         // will the remaining data occupy the entire halfbuffer
         if (remaining_size > half_tx_nr) {
             for (i = 0; i < half_tx_nr; i++) {
@@ -788,17 +938,30 @@ static void ARDUINO_ISR_ATTR _rmt_tx_mem_second(uint8_t ch)
             g_rmt_objects[ch].data_ptr = NULL;
 
         }
+#if CONFIG_IDF_TARGET_ESP32C3
+        RMTMEM.chan[ch].data32[half_tx_nr+i].val = 0;
+        RMT.tx_conf[ch].tx_start = 1;
+#endif
     } else if   ((!(g_rmt_objects[ch].tx_state & E_LAST_DATA)) &&
                  (!(g_rmt_objects[ch].tx_state & E_END_TRANS))) {
+        //ets_printf("RMT Tx finishing %d!\n", ch);
         for (i = 0; i < half_tx_nr; i++) {
             RMTMEM.chan[ch].data32[half_tx_nr+i].val = 0x000F000F;
         }
         RMTMEM.chan[ch].data32[half_tx_nr+i].val = 0;
         g_rmt_objects[ch].tx_state |= E_LAST_DATA;
+#if CONFIG_IDF_TARGET_ESP32C3
+        RMT.tx_conf[ch].tx_conti_mode = 0;
+#else
         RMT.conf_ch[ch].conf1.tx_conti_mode = 0;
+#endif
     } else {
-        log_d("RMT Tx finished %d!\n", ch);
+        //ets_printf("RMT Tx finished %d!\n", ch);
+#if CONFIG_IDF_TARGET_ESP32C3
+        RMT.tx_conf[ch].tx_conti_mode = 0;
+#else
         RMT.conf_ch[ch].conf1.tx_conti_mode = 0;
+#endif
         RMT.int_ena.val &= ~_INT_TX_END(ch);
         RMT.int_ena.val &= ~_INT_THR_EVNT(ch);
         g_rmt_objects[ch].intr_mode = E_NO_INTR;
@@ -814,10 +977,15 @@ static void ARDUINO_ISR_ATTR _rmt_tx_mem_first(uint8_t ch)
     int half_tx_nr = MAX_DATA_PER_ITTERATION/2;
     int i;
     RMT.int_ena.val &= ~_INT_THR_EVNT(ch);
+#if CONFIG_IDF_TARGET_ESP32C3
+    RMT.tx_lim[ch].limit = 0;
+#else
     RMT.tx_lim_ch[ch].limit = 0;
+#endif
 
     if (data) {
         int remaining_size = g_rmt_objects[ch].data_size;
+        //ets_printf("RMT TxF[%d] %d\n", ch, remaining_size);
 
         // will the remaining data occupy the entire halfbuffer
         if (remaining_size > half_tx_nr) {
@@ -828,7 +996,11 @@ static void ARDUINO_ISR_ATTR _rmt_tx_mem_first(uint8_t ch)
             g_rmt_objects[ch].tx_state &= ~E_FIRST_HALF;
             // turn off the treshold interrupt
             RMT.int_ena.val &= ~_INT_THR_EVNT(ch);
+#if CONFIG_IDF_TARGET_ESP32C3
+            RMT.tx_lim[ch].limit = 0;
+#else
             RMT.tx_lim_ch[ch].limit = 0;
+#endif
             g_rmt_objects[ch].data_size -= half_tx_nr;
             g_rmt_objects[ch].data_ptr += half_tx_nr;
         } else {
@@ -845,32 +1017,43 @@ static void ARDUINO_ISR_ATTR _rmt_tx_mem_first(uint8_t ch)
             g_rmt_objects[ch].data_ptr = NULL;
         }
     } else { 
+        //ets_printf("RMT TxF finished %d!\n", ch);
         for (i = 0; i < half_tx_nr; i++) {
             RMTMEM.chan[ch].data32[i].val = 0x000F000F;
         }
         RMTMEM.chan[ch].data32[i].val = 0;
 
         g_rmt_objects[ch].tx_state &= ~E_FIRST_HALF;
+#if CONFIG_IDF_TARGET_ESP32C3
+        RMT.tx_lim[ch].limit = 0;
+#else
         RMT.tx_lim_ch[ch].limit = 0;
+#endif
         g_rmt_objects[ch].tx_state |= E_LAST_DATA;
+#if CONFIG_IDF_TARGET_ESP32C3
+        RMT.tx_conf[ch].tx_conti_mode = 0;
+#else
         RMT.conf_ch[ch].conf1.tx_conti_mode = 0;
+#endif
     }
     DEBUG_INTERRUPT_END(2);
 }
 
 static int ARDUINO_ISR_ATTR _rmt_get_mem_len(uint8_t channel)
 {
+#if CONFIG_IDF_TARGET_ESP32C3
+    int block_num = RMT.rx_conf[channel].conf0.mem_size;
+    int item_block_len = block_num * 48;
+#else
     int block_num = RMT.conf_ch[channel].conf0.mem_size;
     int item_block_len = block_num * 64;
-    volatile uint32_t* data = &RMTMEM.chan[channel].data32->val;
+#endif
+    volatile rmt_item32_t* data = RMTMEM.chan[channel].data32;
     int idx;
     for(idx = 0; idx < item_block_len; idx++) {
-        rmt_item32_t helper;
-        helper.val = data[idx];
-
-        if(helper.duration0 == 0) {
+        if(data[idx].duration0 == 0) {
             return idx;
-        } else if(helper.duration1 == 0) {
+        } else if(data[idx].duration1 == 0) {
             return idx + 1;
         }
     }

cores/esp32/esp32-hal-sigmadelta.c

@@ -19,9 +19,6 @@
 #include "esp32-hal-matrix.h"
 #include "soc/gpio_sd_reg.h"
 #include "soc/gpio_sd_struct.h"
-#include "freertos/semphr.h"
-#include "esp32-hal-cpu.h"
-#include "esp32-hal-gpio.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
@@ -29,6 +26,8 @@
 #include "esp32/rom/ets_sys.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/rom/ets_sys.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -43,7 +42,7 @@
 #else
 #define SD_MUTEX_LOCK()    do {} while (xSemaphoreTake(_sd_sys_lock, portMAX_DELAY) != pdPASS)
 #define SD_MUTEX_UNLOCK()  xSemaphoreGive(_sd_sys_lock)
-SemaphoreHandle_t _sd_sys_lock;
+xSemaphoreHandle _sd_sys_lock;
 #endif
 
 static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){

cores/esp32/esp32-hal-spi.c

@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <string.h>
-
 #include "esp32-hal-spi.h"
 #include "esp32-hal.h"
 #include "freertos/FreeRTOS.h"
@@ -24,19 +22,25 @@
 #include "soc/spi_struct.h"
 #include "soc/io_mux_reg.h"
 #include "soc/gpio_sig_map.h"
-#include "soc/dport_reg.h"
 #include "soc/rtc.h"
+#include "driver/periph_ctrl.h"
 
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "soc/dport_reg.h"
 #include "esp32/rom/ets_sys.h"
 #include "esp32/rom/gpio.h"
 #include "esp_intr_alloc.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
+#include "soc/dport_reg.h"
 #include "esp32s2/rom/ets_sys.h"
 #include "esp32s2/rom/gpio.h"
 #include "esp_intr_alloc.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
+#include "esp32c3/rom/gpio.h"
+#include "esp_intr_alloc.h"
 #else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -45,14 +49,11 @@
 #include "rom/gpio.h"
 #include "esp_intr.h"
 #endif
-#include "esp32-hal-gpio.h"
-#include "esp32-hal-matrix.h"
-#include "esp32-hal-cpu.h"
 
 struct spi_struct_t {
     spi_dev_t * dev;
 #if !CONFIG_DISABLE_HAL_LOCKS
-    SemaphoreHandle_t lock;
+    xSemaphoreHandle lock;
 #endif
     uint8_t num;
 };
@@ -67,11 +68,24 @@ struct spi_struct_t {
 
 #define SPI_SPI_SS_IDX(n)   ((n==0)?SPICS0_OUT_IDX:((n==1)?SPICS1_OUT_IDX:0))
 #define SPI_HSPI_SS_IDX(n)  ((n==0)?SPI3_CS0_OUT_IDX:((n==1)?SPI3_CS1_OUT_IDX:((n==2)?SPI3_CS2_OUT_IDX:SPI3_CS0_OUT_IDX)))
-#define SPI_FSPI_SS_IDX(n)  ((n==0)?FSPICS0_OUT_IDX:((n==1)?FSPICS1_OUT_IDX:((n==2)?FSPICS2_OUT_IDX:VSPICS0_OUT_IDX)))
+#define SPI_FSPI_SS_IDX(n)  ((n==0)?FSPICS0_OUT_IDX:((n==1)?FSPICS1_OUT_IDX:((n==2)?FSPICS2_OUT_IDX:FSPICS0_OUT_IDX)))
 #define SPI_SS_IDX(p, n)    ((p==0)?SPI_SPI_SS_IDX(n):((p==1)?SPI_SPI_SS_IDX(n):((p==2)?SPI_HSPI_SS_IDX(n):0)))
 
 #define SPI_INTR_SOURCE(u)  ((u==0)?ETS_SPI1_INTR_SOURCE:((u==1)?ETS_SPI2_INTR_SOURCE:((u==2)?ETS_SPI3_INTR_SOURCE:0)))
 
+#elif CONFIG_IDF_TARGET_ESP32C3
+// ESP32S2
+#define SPI_COUNT           (1)
+
+#define SPI_CLK_IDX(p)      FSPICLK_OUT_IDX
+#define SPI_MISO_IDX(p)     FSPIQ_OUT_IDX
+#define SPI_MOSI_IDX(p)     FSPID_IN_IDX
+
+#define SPI_SPI_SS_IDX(n)   ((n==0)?FSPICS0_OUT_IDX:((n==1)?FSPICS1_OUT_IDX:((n==2)?FSPICS2_OUT_IDX:FSPICS0_OUT_IDX)))
+#define SPI_SS_IDX(p, n)    SPI_SPI_SS_IDX(n)
+
+#define SPI_INTR_SOURCE(u)  ETS_SPI2_INTR_SOURCE
+
 #else
 // ESP32
 #define SPI_COUNT           (4)
@@ -114,6 +128,8 @@ static spi_t _spi_bus_array[] = {
     {(volatile spi_dev_t *)(DR_REG_SPI1_BASE), NULL, 0},
     {(volatile spi_dev_t *)(DR_REG_SPI2_BASE), NULL, 1},
     {(volatile spi_dev_t *)(DR_REG_SPI3_BASE), NULL, 2}
+#elif CONFIG_IDF_TARGET_ESP32C3
+    {(volatile spi_dev_t *)(&GPSPI2), NULL, FSPI}
 #else
     {(volatile spi_dev_t *)(DR_REG_SPI0_BASE), NULL, 0},
     {(volatile spi_dev_t *)(DR_REG_SPI1_BASE), NULL, 1},
@@ -136,7 +152,7 @@ void spiAttachSCK(spi_t * spi, int8_t sck)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             sck = 14;
         } else if(spi->num == VSPI) {
@@ -144,6 +160,9 @@ void spiAttachSCK(spi_t * spi, int8_t sck)
         } else {
             sck = 6;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMode(sck, OUTPUT);
@@ -163,7 +182,7 @@ void spiAttachMISO(spi_t * spi, int8_t miso)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             miso = 12;
         } else if(spi->num == VSPI) {
@@ -171,6 +190,9 @@ void spiAttachMISO(spi_t * spi, int8_t miso)
         } else {
             miso = 7;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     SPI_MUTEX_LOCK();
@@ -192,7 +214,7 @@ void spiAttachMOSI(spi_t * spi, int8_t mosi)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             mosi = 13;
         } else if(spi->num == VSPI) {
@@ -200,6 +222,9 @@ void spiAttachMOSI(spi_t * spi, int8_t mosi)
         } else {
             mosi = 8;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMode(mosi, OUTPUT);
@@ -219,7 +244,7 @@ void spiDetachSCK(spi_t * spi, int8_t sck)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             sck = 14;
         } else if(spi->num == VSPI) {
@@ -227,6 +252,9 @@ void spiDetachSCK(spi_t * spi, int8_t sck)
         } else {
             sck = 6;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMatrixOutDetach(sck, false, false);
@@ -246,7 +274,7 @@ void spiDetachMISO(spi_t * spi, int8_t miso)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             miso = 12;
         } else if(spi->num == VSPI) {
@@ -254,6 +282,9 @@ void spiDetachMISO(spi_t * spi, int8_t miso)
         } else {
             miso = 7;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMatrixInDetach(SPI_MISO_IDX(spi->num), false, false);
@@ -273,7 +304,7 @@ void spiDetachMOSI(spi_t * spi, int8_t mosi)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             mosi = 13;
         } else if(spi->num == VSPI) {
@@ -281,6 +312,9 @@ void spiDetachMOSI(spi_t * spi, int8_t mosi)
         } else {
             mosi = 8;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMatrixOutDetach(mosi, false, false);
@@ -304,7 +338,7 @@ void spiAttachSS(spi_t * spi, uint8_t cs_num, int8_t ss)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             ss = 15;
         } else if(spi->num == VSPI) {
@@ -312,6 +346,9 @@ void spiAttachSS(spi_t * spi, uint8_t cs_num, int8_t ss)
         } else {
             ss = 11;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMode(ss, OUTPUT);
@@ -332,7 +369,7 @@ void spiDetachSS(spi_t * spi, int8_t ss)
             log_e("HSPI Does not have default pins on ESP32S2!");
             return;
         }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
         if(spi->num == HSPI) {
             ss = 15;
         } else if(spi->num == VSPI) {
@@ -340,6 +377,9 @@ void spiDetachSS(spi_t * spi, int8_t ss)
         } else {
             ss = 11;
         }
+#elif CONFIG_IDF_TARGET_ESP32C3
+        log_e("SPI Does not have default pins on ESP32C3!");
+        return;
 #endif
     }
     pinMatrixOutDetach(ss, false, false);
@@ -352,7 +392,7 @@ void spiEnableSSPins(spi_t * spi, uint8_t cs_mask)
         return;
     }
     SPI_MUTEX_LOCK();
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     spi->dev->misc.val &= ~(cs_mask & SPI_CS_MASK_ALL);
 #else
     spi->dev->pin.val &= ~(cs_mask & SPI_CS_MASK_ALL);
@@ -366,7 +406,7 @@ void spiDisableSSPins(spi_t * spi, uint8_t cs_mask)
         return;
     }
     SPI_MUTEX_LOCK();
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     spi->dev->misc.val |= (cs_mask & SPI_CS_MASK_ALL);
 #else
     spi->dev->pin.val |= (cs_mask & SPI_CS_MASK_ALL);
@@ -402,7 +442,7 @@ void spiSSSet(spi_t * spi)
         return;
     }
     SPI_MUTEX_LOCK();
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     spi->dev->misc.cs_keep_active = 1;
 #else
     spi->dev->pin.cs_keep_active = 1;
@@ -416,7 +456,7 @@ void spiSSClear(spi_t * spi)
         return;
     }
     SPI_MUTEX_LOCK();
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     spi->dev->misc.cs_keep_active = 0;
 #else
     spi->dev->pin.cs_keep_active = 0;
@@ -447,7 +487,7 @@ uint8_t spiGetDataMode(spi_t * spi)
     if(!spi) {
         return 0;
     }
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     bool idleEdge = spi->dev->misc.ck_idle_edge;
 #else
     bool idleEdge = spi->dev->pin.ck_idle_edge;
@@ -473,7 +513,7 @@ void spiSetDataMode(spi_t * spi, uint8_t dataMode)
     SPI_MUTEX_LOCK();
     switch (dataMode) {
     case SPI_MODE1:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 0;
 #else
         spi->dev->pin.ck_idle_edge = 0;
@@ -481,7 +521,7 @@ void spiSetDataMode(spi_t * spi, uint8_t dataMode)
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE2:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 1;
 #else
         spi->dev->pin.ck_idle_edge = 1;
@@ -489,7 +529,7 @@ void spiSetDataMode(spi_t * spi, uint8_t dataMode)
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE3:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 1;
 #else
         spi->dev->pin.ck_idle_edge = 1;
@@ -498,7 +538,7 @@ void spiSetDataMode(spi_t * spi, uint8_t dataMode)
         break;
     case SPI_MODE0:
     default:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 0;
 #else
         spi->dev->pin.ck_idle_edge = 0;
@@ -547,9 +587,11 @@ static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb
 
 static void spiInitBus(spi_t * spi)
 {
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->slave.trans_done = 0;
-    spi->dev->slave.slave_mode = 0;
-#if CONFIG_IDF_TARGET_ESP32S2
+#endif
+    spi->dev->slave.val = 0;
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
     spi->dev->misc.val = 0;
 #else
     spi->dev->pin.val = 0;
@@ -557,8 +599,15 @@ static void spiInitBus(spi_t * spi)
     spi->dev->user.val = 0;
     spi->dev->user1.val = 0;
     spi->dev->ctrl.val = 0;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->ctrl1.val = 0;
     spi->dev->ctrl2.val = 0;
+#else
+    spi->dev->clk_gate.val = 0;
+    spi->dev->dma_conf.val = 0;
+    spi->dev->dma_conf.rx_afifo_rst = 1;
+    spi->dev->dma_conf.buf_afifo_rst = 1;
+#endif
     spi->dev->clock.val = 0;
 }
 
@@ -567,9 +616,9 @@ void spiStopBus(spi_t * spi)
     if(!spi) {
         return;
     }
-    
+
     removeApbChangeCallback(spi, _on_apb_change);
-    
+
     SPI_MUTEX_LOCK();
     spiInitBus(spi);
     SPI_MUTEX_UNLOCK();
@@ -603,7 +652,7 @@ spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI01_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI01_RST);
     }
-#else
+#elif CONFIG_IDF_TARGET_ESP32
     if(spi_num == HSPI) {
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI2_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI2_RST);
@@ -614,14 +663,24 @@ spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI01_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI01_RST);
     }
+#elif CONFIG_IDF_TARGET_ESP32C3
+    periph_module_reset( PERIPH_SPI2_MODULE );
+    periph_module_enable( PERIPH_SPI2_MODULE );
 #endif
 
     SPI_MUTEX_LOCK();
     spiInitBus(spi);
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->clk_gate.clk_en = 1;
+    spi->dev->clk_gate.mst_clk_sel = 1;
+    spi->dev->clk_gate.mst_clk_active = 1;
+    spi->dev->dma_conf.tx_seg_trans_clr_en = 1;
+    spi->dev->dma_conf.rx_seg_trans_clr_en = 1;
+    spi->dev->dma_conf.dma_seg_trans_en = 0;
+#endif
     spi->dev->user.usr_mosi = 1;
     spi->dev->user.usr_miso = 1;
     spi->dev->user.doutdin = 1;
-
     int i;
     for(i=0; i<16; i++) {
         spi->dev->data_buf[i] = 0x00000000;
@@ -633,6 +692,7 @@ spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_
     spiSetClockDiv(spi, clockDiv);
 
     addApbChangeCallback(spi, _on_apb_change);
+
     return spi;
 }
 
@@ -647,6 +707,11 @@ void spiWaitReady(spi_t * spi)
 #if CONFIG_IDF_TARGET_ESP32S2
 #define usr_mosi_dbitlen usr_mosi_bit_len
 #define usr_miso_dbitlen usr_miso_bit_len
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define usr_mosi_dbitlen ms_data_bitlen
+#define usr_miso_dbitlen ms_data_bitlen
+#define mosi_dlen ms_dlen
+#define miso_dlen ms_dlen
 #endif
 
 void spiWrite(spi_t * spi, const uint32_t *data, uint8_t len)
@@ -660,10 +725,16 @@ void spiWrite(spi_t * spi, const uint32_t *data, uint8_t len)
     }
     SPI_MUTEX_LOCK();
     spi->dev->mosi_dlen.usr_mosi_dbitlen = (len * 32) - 1;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     for(i=0; i<len; i++) {
         spi->dev->data_buf[i] = data[i];
     }
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     SPI_MUTEX_UNLOCK();
@@ -684,6 +755,10 @@ void spiTransfer(spi_t * spi, uint32_t *data, uint8_t len)
     for(i=0; i<len; i++) {
         spi->dev->data_buf[i] = data[i];
     }
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     for(i=0; i<len; i++) {
@@ -699,8 +774,14 @@ void spiWriteByte(spi_t * spi, uint8_t data)
     }
     SPI_MUTEX_LOCK();
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     SPI_MUTEX_UNLOCK();
@@ -715,6 +796,10 @@ uint8_t spiTransferByte(spi_t * spi, uint8_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
     spi->dev->miso_dlen.usr_miso_dbitlen = 7;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0] & 0xFF;
@@ -742,8 +827,14 @@ void spiWriteWord(spi_t * spi, uint16_t data)
     }
     SPI_MUTEX_LOCK();
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     SPI_MUTEX_UNLOCK();
@@ -761,6 +852,10 @@ uint16_t spiTransferWord(spi_t * spi, uint16_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
     spi->dev->miso_dlen.usr_miso_dbitlen = 15;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0];
@@ -781,8 +876,14 @@ void spiWriteLong(spi_t * spi, uint32_t data)
     }
     SPI_MUTEX_LOCK();
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     SPI_MUTEX_UNLOCK();
@@ -800,6 +901,10 @@ uint32_t spiTransferLong(spi_t * spi, uint32_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
     spi->dev->miso_dlen.usr_miso_dbitlen = 31;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0];
@@ -839,6 +944,10 @@ static void __spiTransferBytes(spi_t * spi, const uint8_t * data, uint8_t * out,
         spi->dev->data_buf[i] = wordsBuf[i];    //copy buffer to spi fifo
     }
 
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
 
     while(spi->dev->cmd.usr);
@@ -903,7 +1012,7 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
     spi->dev->clock.val = clockDiv;
     switch (dataMode) {
     case SPI_MODE1:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 0;
 #else
         spi->dev->pin.ck_idle_edge = 0;
@@ -911,7 +1020,7 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE2:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 1;
 #else
         spi->dev->pin.ck_idle_edge = 1;
@@ -919,7 +1028,7 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE3:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 1;
 #else
         spi->dev->pin.ck_idle_edge = 1;
@@ -928,7 +1037,7 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
         break;
     case SPI_MODE0:
     default:
-#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         spi->dev->misc.ck_idle_edge = 0;
 #else
         spi->dev->pin.ck_idle_edge = 0;
@@ -967,8 +1076,14 @@ void ARDUINO_ISR_ATTR spiWriteByteNL(spi_t * spi, uint8_t data)
         return;
     }
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
 }
@@ -981,6 +1096,10 @@ uint8_t spiTransferByteNL(spi_t * spi, uint8_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
     spi->dev->miso_dlen.usr_miso_dbitlen = 7;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0] & 0xFF;
@@ -996,8 +1115,14 @@ void ARDUINO_ISR_ATTR spiWriteShortNL(spi_t * spi, uint16_t data)
         MSB_16_SET(data, data);
     }
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
 }
@@ -1013,6 +1138,10 @@ uint16_t spiTransferShortNL(spi_t * spi, uint16_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
     spi->dev->miso_dlen.usr_miso_dbitlen = 15;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0] & 0xFFFF;
@@ -1031,8 +1160,14 @@ void ARDUINO_ISR_ATTR spiWriteLongNL(spi_t * spi, uint32_t data)
         MSB_32_SET(data, data);
     }
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
     spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
 }
@@ -1048,6 +1183,10 @@ uint32_t spiTransferLongNL(spi_t * spi, uint32_t data)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
     spi->dev->miso_dlen.usr_miso_dbitlen = 31;
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0];
@@ -1058,6 +1197,9 @@ uint32_t spiTransferLongNL(spi_t * spi, uint32_t data)
 }
 
 void spiWriteNL(spi_t * spi, const void * data_in, uint32_t len){
+    if(!spi) {
+        return;
+    }
     size_t longs = len >> 2;
     if(len & 3){
         longs++;
@@ -1070,10 +1212,16 @@ void spiWriteNL(spi_t * spi, const void * data_in, uint32_t len){
         c_longs = (longs > 16)?16:longs;
 
         spi->dev->mosi_dlen.usr_mosi_dbitlen = (c_len*8)-1;
-        spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
         for (int i=0; i<c_longs; i++) {
             spi->dev->data_buf[i] = data[i];
         }
+#if CONFIG_IDF_TARGET_ESP32C3
+        spi->dev->cmd.update = 1;
+        while (spi->dev->cmd.update);
+#endif
         spi->dev->cmd.usr = 1;
         while(spi->dev->cmd.usr);
 
@@ -1110,11 +1258,27 @@ void spiTransferBytesNL(spi_t * spi, const void * data_in, uint8_t * data_out, u
                 spi->dev->data_buf[i] = 0xFFFFFFFF;
             }
         }
+#if CONFIG_IDF_TARGET_ESP32C3
+        spi->dev->cmd.update = 1;
+        while (spi->dev->cmd.update);
+#endif
         spi->dev->cmd.usr = 1;
         while(spi->dev->cmd.usr);
         if(result){
-            for (int i=0; i<c_longs; i++) {
-                result[i] = spi->dev->data_buf[i];
+            if(c_len & 3){
+                for (int i=0; i<(c_longs-1); i++) {
+                    result[i] = spi->dev->data_buf[i];
+                }
+                uint32_t last_data = spi->dev->data_buf[c_longs-1];
+                uint8_t * last_out8 = (uint8_t *)&result[c_longs-1];
+                uint8_t * last_data8 = (uint8_t *)&last_data;
+                for (int i=0; i<(c_len & 3); i++) {
+                    last_out8[i] = last_data8[i];
+                }
+            } else {
+                for (int i=0; i<c_longs; i++) {
+                    result[i] = spi->dev->data_buf[i];
+                }
             }
         }
         if(data){
@@ -1153,6 +1317,10 @@ void spiTransferBitsNL(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits)
     spi->dev->mosi_dlen.usr_mosi_dbitlen = (bits - 1);
     spi->dev->miso_dlen.usr_miso_dbitlen = (bits - 1);
     spi->dev->data_buf[0] = data;
+#if CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
     spi->dev->cmd.usr = 1;
     while(spi->dev->cmd.usr);
     data = spi->dev->data_buf[0];
@@ -1185,7 +1353,9 @@ void ARDUINO_ISR_ATTR spiWritePixelsNL(spi_t * spi, const void * data_in, uint32
         l_bytes = (c_len & 3);
 
         spi->dev->mosi_dlen.usr_mosi_dbitlen = (c_len*8)-1;
-        spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
+    spi->dev->miso_dlen.usr_miso_dbitlen = 0;
+#endif
         for (int i=0; i<c_longs; i++) {
             if(msb){
                 if(l_bytes && i == (c_longs - 1)){
@@ -1201,6 +1371,10 @@ void ARDUINO_ISR_ATTR spiWritePixelsNL(spi_t * spi, const void * data_in, uint32
                 spi->dev->data_buf[i] = data[i];
             }
         }
+#if CONFIG_IDF_TARGET_ESP32C3
+        spi->dev->cmd.update = 1;
+        while (spi->dev->cmd.update);
+#endif
         spi->dev->cmd.usr = 1;
         while(spi->dev->cmd.usr);
 
@@ -1223,7 +1397,12 @@ typedef union {
             uint32_t clkcnt_l:       6;                     /*it must be equal to spi_clkcnt_N.*/
             uint32_t clkcnt_h:       6;                     /*it must be floor((spi_clkcnt_N+1)/2-1).*/
             uint32_t clkcnt_n:       6;                     /*it is the divider of spi_clk. So spi_clk frequency is system/(spi_clkdiv_pre+1)/(spi_clkcnt_N+1)*/
+#if CONFIG_IDF_TARGET_ESP32C3
+            uint32_t clkdiv_pre:     4;                     /*it is pre-divider of spi_clk.*/
+            uint32_t reserved:       9;  					/*reserved*/
+#else
             uint32_t clkdiv_pre:    13;                     /*it is pre-divider of spi_clk.*/
+#endif
             uint32_t clk_equ_sysclk: 1;                     /*1: spi_clk is eqaul to system 0: spi_clk is divided from system clock.*/
     };
 } spiClk_t;
@@ -1265,8 +1444,13 @@ uint32_t spiFrequencyToClockDiv(uint32_t freq)
 
         while(calPreVari++ <= 1) {
             calPre = (((apb_freq / (reg.clkcnt_n + 1)) / freq) - 1) + calPreVari;
+#if CONFIG_IDF_TARGET_ESP32C3
+            if(calPre > 0xF) {
+                reg.clkdiv_pre = 0xF;
+#else
             if(calPre > 0x1FFF) {
                 reg.clkdiv_pre = 0x1FFF;
+#endif
             } else if(calPre <= 0) {
                 reg.clkdiv_pre = 0;
             } else {

cores/esp32/esp32-hal-spi.h

@@ -25,11 +25,16 @@ extern "C" {
 
 #define SPI_HAS_TRANSACTION
 
+#if CONFIG_IDF_TARGET_ESP32C3
+#define FSPI  0
+#define HSPI  1
+#else
 #define FSPI  1 //SPI bus attached to the flash (can use the same data lines but different SS)
 #define HSPI  2 //SPI bus normally mapped to pins 12 - 15, but can be matrixed to any pins
 #if CONFIG_IDF_TARGET_ESP32
 #define VSPI  3 //SPI bus normally attached to pins 5, 18, 19 and 23, but can be matrixed to any pins
 #endif
+#endif
 
 // This defines are not representing the real Divider of the ESP32
 // the Defines match to an AVR Arduino on 16MHz for better compatibility

cores/esp32/esp32-hal-time.c

@@ -0,0 +1,101 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "esp32-hal.h"
+#include "lwip/apps/sntp.h"
+//#include "tcpip_adapter.h"
+#include "esp_netif.h"
+
+static void setTimeZone(long offset, int daylight)
+{
+    char cst[17] = {0};
+    char cdt[17] = "DST";
+    char tz[33] = {0};
+
+    if(offset % 3600){
+        sprintf(cst, "UTC%ld:%02u:%02u", offset / 3600, abs((offset % 3600) / 60), abs(offset % 60));
+    } else {
+        sprintf(cst, "UTC%ld", offset / 3600);
+    }
+    if(daylight != 3600){
+        long tz_dst = offset - daylight;
+        if(tz_dst % 3600){
+            sprintf(cdt, "DST%ld:%02u:%02u", tz_dst / 3600, abs((tz_dst % 3600) / 60), abs(tz_dst % 60));
+        } else {
+            sprintf(cdt, "DST%ld", tz_dst / 3600);
+        }
+    }
+    sprintf(tz, "%s%s", cst, cdt);
+    setenv("TZ", tz, 1);
+    tzset();
+}
+
+/*
+ * configTime
+ * Source: https://github.com/esp8266/Arduino/blob/master/cores/esp8266/time.c
+ * Note: Bundled Arduino lwip supports only ONE ntp server, 2nd and 3rd options are silently ignored
+ *       see CONFIG_LWIP_DHCP_MAX_NTP_SERVERS define in ./tools/sdk/esp32/sdkconfig
+ * */
+void configTime(long gmtOffset_sec, int daylightOffset_sec, const char* server1, const char* server2, const char* server3)
+{
+    //tcpip_adapter_init();  // Should not hurt anything if already inited
+    esp_netif_init();
+    if(sntp_enabled()){
+        sntp_stop();
+    }
+    sntp_setoperatingmode(SNTP_OPMODE_POLL);
+    sntp_setservername(0, (char*)server1);
+    sntp_setservername(1, (char*)server2);
+    sntp_setservername(2, (char*)server3);
+    sntp_init();
+    setTimeZone(-gmtOffset_sec, daylightOffset_sec);
+}
+
+/*
+ * configTzTime
+ * sntp setup using TZ environment variable
+ * Note: Bundled Arduino lwip supports only ONE ntp server, 2nd and 3rd options are silently ignored
+ *       see CONFIG_LWIP_DHCP_MAX_NTP_SERVERS define in ./tools/sdk/esp32/sdkconfig
+ * */
+void configTzTime(const char* tz, const char* server1, const char* server2, const char* server3)
+{
+    //tcpip_adapter_init();  // Should not hurt anything if already inited
+    esp_netif_init();
+    if(sntp_enabled()){
+        sntp_stop();
+    }
+    sntp_setoperatingmode(SNTP_OPMODE_POLL);
+    sntp_setservername(0, (char*)server1);
+    sntp_setservername(1, (char*)server2);
+    sntp_setservername(2, (char*)server3);
+    sntp_init();
+    setenv("TZ", tz, 1);
+    tzset();
+}
+
+bool getLocalTime(struct tm * info, uint32_t ms)
+{
+    uint32_t start = millis();
+    time_t now;
+    while((millis()-start) <= ms) {
+        time(&now);
+        localtime_r(&now, info);
+        if(info->tm_year > (2016 - 1900)){
+            return true;
+        }
+        delay(10);
+    }
+    return false;
+}
+

cores/esp32/esp32-hal-timer.c

@@ -0,0 +1,373 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "esp32-hal-timer.h"
+#include "freertos/FreeRTOS.h"
+#ifndef CONFIG_IDF_TARGET_ESP32C3
+#include "freertos/xtensa_api.h"
+#include "soc/dport_reg.h"
+#endif
+#include "freertos/task.h"
+#include "soc/timer_group_struct.h"
+#include "esp_attr.h"
+#include "driver/periph_ctrl.h"
+
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/ets_sys.h"
+#include "esp_intr_alloc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/ets_sys.h"
+#include "esp_intr_alloc.h"
+#include "soc/periph_defs.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
+#include "esp_intr_alloc.h"
+#include "soc/periph_defs.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/ets_sys.h"
+#include "esp_intr.h"
+#endif
+
+#define HWTIMER_LOCK()      portENTER_CRITICAL(timer->lock)
+#define HWTIMER_UNLOCK()    portEXIT_CRITICAL(timer->lock)
+
+typedef volatile struct {
+    union {
+        struct {
+            uint32_t reserved0:   10;
+            uint32_t alarm_en:     1;             /*When set  alarm is enabled*/
+            uint32_t level_int_en: 1;             /*When set  level type interrupt will be generated during alarm*/
+            uint32_t edge_int_en:  1;             /*When set  edge type interrupt will be generated during alarm*/
+            uint32_t divider:     16;             /*Timer clock (T0/1_clk) pre-scale value.*/
+            uint32_t autoreload:   1;             /*When set  timer 0/1 auto-reload at alarming is enabled*/
+            uint32_t increase:     1;             /*When set  timer 0/1 time-base counter increment. When cleared timer 0 time-base counter decrement.*/
+            uint32_t enable:       1;             /*When set  timer 0/1 time-base counter is enabled*/
+        };
+        uint32_t val;
+    } config;
+    uint32_t cnt_low;                             /*Register to store timer 0/1 time-base counter current value lower 32 bits.*/
+    uint32_t cnt_high;                            /*Register to store timer 0 time-base counter current value higher 32 bits.*/
+    uint32_t update;                              /*Write any value will trigger a timer 0 time-base counter value update (timer 0 current value will be stored in registers above)*/
+    uint32_t alarm_low;                           /*Timer 0 time-base counter value lower 32 bits that will trigger the alarm*/
+    uint32_t alarm_high;                          /*Timer 0 time-base counter value higher 32 bits that will trigger the alarm*/
+    uint32_t load_low;                            /*Lower 32 bits of the value that will load into timer 0 time-base counter*/
+    uint32_t load_high;                           /*higher 32 bits of the value that will load into timer 0 time-base counter*/
+    uint32_t reload;                              /*Write any value will trigger timer 0 time-base counter reload*/
+} hw_timer_reg_t;
+
+typedef struct hw_timer_s {
+        hw_timer_reg_t * dev;
+        uint8_t num;
+        uint8_t group;
+        uint8_t timer;
+        portMUX_TYPE lock;
+} hw_timer_t;
+
+static hw_timer_t hw_timer[4] = {
+        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE),0,0,0,portMUX_INITIALIZER_UNLOCKED},
+        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x0024),1,0,1,portMUX_INITIALIZER_UNLOCKED},
+        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x1000),2,1,0,portMUX_INITIALIZER_UNLOCKED},
+        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x1024),3,1,1,portMUX_INITIALIZER_UNLOCKED}
+};
+
+typedef void (*voidFuncPtr)(void);
+static voidFuncPtr __timerInterruptHandlers[4] = {0,0,0,0};
+
+void ARDUINO_ISR_ATTR __timerISR(void * arg){
+    uint32_t s0 = TIMERG0.int_st_timers.val;
+    uint32_t s1 = TIMERG1.int_st_timers.val;
+    TIMERG0.int_clr_timers.val = s0;
+    TIMERG1.int_clr_timers.val = s1;
+    uint8_t status = (s1 & 3) << 2 | (s0 & 3);
+    uint8_t i = 4;
+    //restart the timers that should autoreload
+    while(i--){
+        hw_timer_reg_t * dev = hw_timer[i].dev;
+        if((status & (1 << i)) && dev->config.autoreload){
+            dev->config.alarm_en = 1;
+        }
+    }
+    i = 4;
+    //call callbacks
+    while(i--){
+        if(__timerInterruptHandlers[i] && (status & (1 << i))){
+            __timerInterruptHandlers[i]();
+        }
+    }
+}
+
+uint64_t inline timerRead(hw_timer_t *timer){
+    timer->dev->update = 1;
+    while (timer->dev->update) {};
+    uint64_t h = timer->dev->cnt_high;
+    uint64_t l = timer->dev->cnt_low;
+    return (h << 32) | l;
+}
+
+uint64_t timerAlarmRead(hw_timer_t *timer){
+    uint64_t h = timer->dev->alarm_high;
+    uint64_t l = timer->dev->alarm_low;
+    return (h << 32) | l;
+}
+
+void timerWrite(hw_timer_t *timer, uint64_t val){
+    timer->dev->load_high = (uint32_t) (val >> 32);
+    timer->dev->load_low = (uint32_t) (val);
+    timer->dev->reload = 1;
+}
+
+void timerAlarmWrite(hw_timer_t *timer, uint64_t alarm_value, bool autoreload){
+    timer->dev->alarm_high = (uint32_t) (alarm_value >> 32);
+    timer->dev->alarm_low = (uint32_t) alarm_value;
+    timer->dev->config.autoreload = autoreload;
+}
+
+void timerSetConfig(hw_timer_t *timer, uint32_t config){
+    timer->dev->config.val = config;
+}
+
+uint32_t timerGetConfig(hw_timer_t *timer){
+    return timer->dev->config.val;
+}
+
+void timerSetCountUp(hw_timer_t *timer, bool countUp){
+    timer->dev->config.increase = countUp;
+}
+
+bool timerGetCountUp(hw_timer_t *timer){
+    return timer->dev->config.increase;
+}
+
+void timerSetAutoReload(hw_timer_t *timer, bool autoreload){
+    timer->dev->config.autoreload = autoreload;
+}
+
+bool timerGetAutoReload(hw_timer_t *timer){
+    return timer->dev->config.autoreload;
+}
+
+void timerSetDivider(hw_timer_t *timer, uint16_t divider){//2 to 65536
+    if(!divider){
+        divider = 0xFFFF;
+    } else if(divider == 1){
+        divider = 2;
+    }
+    int timer_en = timer->dev->config.enable;
+    timer->dev->config.enable = 0;
+    timer->dev->config.divider = divider;
+    timer->dev->config.enable = timer_en;
+}
+
+uint16_t timerGetDivider(hw_timer_t *timer){
+    return timer->dev->config.divider;
+}
+
+void timerStart(hw_timer_t *timer){
+    timer->dev->config.enable = 1;
+}
+
+void timerStop(hw_timer_t *timer){
+    timer->dev->config.enable = 0;
+}
+
+void timerRestart(hw_timer_t *timer){
+    timer->dev->config.enable = 0;
+    timer->dev->reload = 1;
+    timer->dev->config.enable = 1;
+}
+
+bool timerStarted(hw_timer_t *timer){
+    return timer->dev->config.enable;
+}
+
+void timerAlarmEnable(hw_timer_t *timer){
+    timer->dev->config.alarm_en = 1;
+}
+
+void timerAlarmDisable(hw_timer_t *timer){
+    timer->dev->config.alarm_en = 0;
+}
+
+bool timerAlarmEnabled(hw_timer_t *timer){
+    return timer->dev->config.alarm_en;
+}
+
+static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
+    hw_timer_t * timer = (hw_timer_t *)arg;
+    if(ev_type == APB_BEFORE_CHANGE){
+        timer->dev->config.enable = 0;
+    } else {
+        old_apb /= 1000000;
+        new_apb /= 1000000;
+        timer->dev->config.divider = (new_apb * timer->dev->config.divider) / old_apb;
+        timer->dev->config.enable = 1;
+    }
+}
+
+hw_timer_t * timerBegin(uint8_t num, uint16_t divider, bool countUp){
+    if(num > 3){
+        return NULL;
+    }
+    hw_timer_t * timer = &hw_timer[num];
+    if(timer->group) {
+    	periph_module_enable(PERIPH_TIMG1_MODULE);
+    } else {
+    	periph_module_enable(PERIPH_TIMG0_MODULE);
+    }
+    timer->dev->config.enable = 0;
+    if(timer->group) {
+#if CONFIG_IDF_TARGET_ESP32
+        TIMERG1.int_ena.val &= ~BIT(timer->timer);
+#else
+        TIMERG1.int_ena_timers.val &= ~BIT(timer->timer);
+#endif
+        TIMERG1.int_clr_timers.val |= BIT(timer->timer);
+    } else {
+#if CONFIG_IDF_TARGET_ESP32
+        TIMERG0.int_ena.val &= ~BIT(timer->timer);
+#else
+        TIMERG0.int_ena_timers.val &= ~BIT(timer->timer);
+#endif
+        TIMERG0.int_clr_timers.val |= BIT(timer->timer);
+    }
+#ifdef TIMER_GROUP_SUPPORTS_XTAL_CLOCK
+    timer->dev->config.use_xtal = 0;
+#endif
+    timerSetDivider(timer, divider);
+    timerSetCountUp(timer, countUp);
+    timerSetAutoReload(timer, false);
+    timerAttachInterrupt(timer, NULL, false);
+    timerWrite(timer, 0);
+    timer->dev->config.enable = 1;
+    addApbChangeCallback(timer, _on_apb_change);
+    return timer;
+}
+
+void timerEnd(hw_timer_t *timer){
+    timer->dev->config.enable = 0;
+    timerAttachInterrupt(timer, NULL, false);
+    removeApbChangeCallback(timer, _on_apb_change);
+}
+
+void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
+#if CONFIG_IDF_TARGET_ESP32
+    if(edge){
+        log_w("EDGE timer interrupt does not work properly on ESP32! Setting to LEVEL...");
+        edge = false;
+    }
+#endif
+    static bool initialized = false;
+    static intr_handle_t intr_handle = NULL;
+    if(intr_handle){
+        esp_intr_disable(intr_handle);
+    }
+    if(fn == NULL){
+        timer->dev->config.level_int_en = 0;
+        timer->dev->config.edge_int_en = 0;
+        timer->dev->config.alarm_en = 0;
+        if(timer->num & 2){
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG1.int_ena.val &= ~BIT(timer->timer);
+#else
+            TIMERG1.int_ena_timers.val &= ~BIT(timer->timer);
+#endif
+            TIMERG1.int_clr_timers.val |= BIT(timer->timer);
+        } else {
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG0.int_ena.val &= ~BIT(timer->timer);
+#else
+            TIMERG0.int_ena_timers.val &= ~BIT(timer->timer);
+#endif
+            TIMERG0.int_clr_timers.val |= BIT(timer->timer);
+        }
+        __timerInterruptHandlers[timer->num] = NULL;
+    } else {
+        __timerInterruptHandlers[timer->num] = fn;
+        timer->dev->config.level_int_en = edge?0:1;//When set, an alarm will generate a level type interrupt.
+        timer->dev->config.edge_int_en = edge?1:0;//When set, an alarm will generate an edge type interrupt.
+        int intr_source = 0;
+#ifndef CONFIG_IDF_TARGET_ESP32C3
+        if(!edge){
+#endif
+            if(timer->group){
+                intr_source = ETS_TG1_T0_LEVEL_INTR_SOURCE + timer->timer;
+            } else {
+                intr_source = ETS_TG0_T0_LEVEL_INTR_SOURCE + timer->timer;
+            }
+#ifndef CONFIG_IDF_TARGET_ESP32C3
+        } else {
+            if(timer->group){
+                intr_source = ETS_TG1_T0_EDGE_INTR_SOURCE + timer->timer;
+            } else {
+                intr_source = ETS_TG0_T0_EDGE_INTR_SOURCE + timer->timer;
+            }
+        }
+#endif
+        if(!initialized){
+            initialized = true;
+            esp_intr_alloc(intr_source, (int)(ARDUINO_ISR_FLAG|ESP_INTR_FLAG_LOWMED), __timerISR, NULL, &intr_handle);
+        } else {
+            intr_matrix_set(esp_intr_get_cpu(intr_handle), intr_source, esp_intr_get_intno(intr_handle));
+        }
+        if(timer->group){
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG1.int_ena.val |= BIT(timer->timer);
+#else
+            TIMERG1.int_ena_timers.val |= BIT(timer->timer);
+#endif
+        } else {
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG0.int_ena.val |= BIT(timer->timer);
+#else
+            TIMERG0.int_ena_timers.val |= BIT(timer->timer);
+#endif
+        }
+    }
+    if(intr_handle){
+        esp_intr_enable(intr_handle);
+    }
+}
+
+void timerDetachInterrupt(hw_timer_t *timer){
+    timerAttachInterrupt(timer, NULL, false);
+}
+
+uint64_t timerReadMicros(hw_timer_t *timer){
+    uint64_t timer_val = timerRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return timer_val * div / (getApbFrequency() / 1000000);
+}
+
+double timerReadSeconds(hw_timer_t *timer){
+    uint64_t timer_val = timerRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return (double)timer_val * div / getApbFrequency();
+}
+
+uint64_t timerAlarmReadMicros(hw_timer_t *timer){
+    uint64_t timer_val = timerAlarmRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return timer_val * div / (getApbFrequency() / 1000000);
+}
+
+double timerAlarmReadSeconds(hw_timer_t *timer){
+    uint64_t timer_val = timerAlarmRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return (double)timer_val * div / getApbFrequency();
+}

cores/esp32/esp32-hal-timer.h

@@ -0,0 +1,72 @@
+/*
+ Arduino.h - Main include file for the Arduino SDK
+ Copyright (c) 2005-2013 Arduino Team.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef MAIN_ESP32_HAL_TIMER_H_
+#define MAIN_ESP32_HAL_TIMER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "esp32-hal.h"
+#include "freertos/FreeRTOS.h"
+
+struct hw_timer_s;
+typedef struct hw_timer_s hw_timer_t;
+
+hw_timer_t * timerBegin(uint8_t timer, uint16_t divider, bool countUp);
+void timerEnd(hw_timer_t *timer);
+
+void timerSetConfig(hw_timer_t *timer, uint32_t config);
+uint32_t timerGetConfig(hw_timer_t *timer);
+
+void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge);
+void timerDetachInterrupt(hw_timer_t *timer);
+
+void timerStart(hw_timer_t *timer);
+void timerStop(hw_timer_t *timer);
+void timerRestart(hw_timer_t *timer);
+void timerWrite(hw_timer_t *timer, uint64_t val);
+void timerSetDivider(hw_timer_t *timer, uint16_t divider);
+void timerSetCountUp(hw_timer_t *timer, bool countUp);
+void timerSetAutoReload(hw_timer_t *timer, bool autoreload);
+
+bool timerStarted(hw_timer_t *timer);
+uint64_t timerRead(hw_timer_t *timer);
+uint64_t timerReadMicros(hw_timer_t *timer);
+double timerReadSeconds(hw_timer_t *timer);
+uint16_t timerGetDivider(hw_timer_t *timer);
+bool timerGetCountUp(hw_timer_t *timer);
+bool timerGetAutoReload(hw_timer_t *timer);
+
+void timerAlarmEnable(hw_timer_t *timer);
+void timerAlarmDisable(hw_timer_t *timer);
+void timerAlarmWrite(hw_timer_t *timer, uint64_t interruptAt, bool autoreload);
+
+bool timerAlarmEnabled(hw_timer_t *timer);
+uint64_t timerAlarmRead(hw_timer_t *timer);
+uint64_t timerAlarmReadMicros(hw_timer_t *timer);
+double timerAlarmReadSeconds(hw_timer_t *timer);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAIN_ESP32_HAL_TIMER_H_ */

cores/esp32/esp32-hal-tinyusb.c

@@ -1,7 +1,8 @@
 
 #include "sdkconfig.h"
-#if CONFIG_USB_ENABLED
+#if CONFIG_TINYUSB_ENABLED
 #include <stdlib.h>
+#include <stdbool.h>
 
 #include "esp_log.h"
 
@@ -12,10 +13,14 @@
 #include "soc/usb_reg.h"
 #include "soc/usb_wrap_reg.h"
 #include "soc/usb_wrap_struct.h"
+#include "soc/usb_periph.h"
 #include "soc/periph_defs.h"
 #include "soc/timer_group_struct.h"
 #include "soc/system_reg.h"
 
+#include "hal/usb_hal.h"
+#include "hal/gpio_ll.h"
+
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
@@ -24,8 +29,8 @@
 
 #include "esp_efuse.h"
 #include "esp_efuse_table.h"
+#include "esp_rom_gpio.h"
 
-#include "tinyusb.h"
 #include "esp32-hal.h"
 
 #include "esp32-hal-tinyusb.h"
@@ -33,6 +38,61 @@
 #include "esp32s2/rom/usb/usb_dc.h"
 #include "esp32s2/rom/usb/chip_usb_dw_wrapper.h"
 
+typedef enum{
+    TINYUSB_USBDEV_0,
+} tinyusb_usbdev_t;
+
+typedef char *tusb_desc_strarray_device_t[USB_STRING_DESCRIPTOR_ARRAY_SIZE];
+
+typedef struct {
+    bool external_phy;
+} tinyusb_config_t;
+
+static void configure_pins(usb_hal_context_t *usb)
+{
+    for (const usb_iopin_dsc_t *iopin = usb_periph_iopins; iopin->pin != -1; ++iopin) {
+        if ((usb->use_external_phy) || (iopin->ext_phy_only == 0)) {
+            esp_rom_gpio_pad_select_gpio(iopin->pin);
+            if (iopin->is_output) {
+                esp_rom_gpio_connect_out_signal(iopin->pin, iopin->func, false, false);
+            } else {
+                esp_rom_gpio_connect_in_signal(iopin->pin, iopin->func, false);
+                if ((iopin->pin != GPIO_FUNC_IN_LOW) && (iopin->pin != GPIO_FUNC_IN_HIGH)) {
+                    gpio_ll_input_enable(&GPIO, iopin->pin);
+                }
+            }
+            esp_rom_gpio_pad_unhold(iopin->pin);
+        }
+    }
+    if (!usb->use_external_phy) {
+        gpio_set_drive_capability(USBPHY_DM_NUM, GPIO_DRIVE_CAP_3);
+        gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
+    }
+}
+
+esp_err_t tinyusb_driver_install(const tinyusb_config_t *config)
+{
+    usb_hal_context_t hal = {
+        .use_external_phy = config->external_phy
+    };
+    usb_hal_init(&hal);
+    configure_pins(&hal);
+    if (!tusb_init()) {
+        log_e("Can't initialize the TinyUSB stack.");
+        return ESP_FAIL;
+    }
+    return ESP_OK;
+}
+
+
+
+
+
+
+
+
+
+
 typedef char tusb_str_t[127];
 
 static bool WEBUSB_ENABLED                = false;
@@ -41,6 +101,7 @@ static tusb_str_t WEBUSB_URL              = "";
 static tusb_str_t USB_DEVICE_PRODUCT      = "";
 static tusb_str_t USB_DEVICE_MANUFACTURER = "";
 static tusb_str_t USB_DEVICE_SERIAL       = "";
+static tusb_str_t USB_DEVICE_LANGUAGE     = "\x09\x04";//English (0x0409)
 
 static uint8_t USB_DEVICE_ATTRIBUTES     = 0;
 static uint16_t USB_DEVICE_POWER         = 0;
@@ -75,7 +136,7 @@ static tusb_desc_device_t tinyusb_device_descriptor = {
 static uint32_t tinyusb_string_descriptor_len = 4;
 static char * tinyusb_string_descriptor[MAX_STRING_DESCRIPTORS] = {
         // array of pointer to string descriptors
-        "\x09\x04",   // 0: is supported language is English (0x0409)
+        USB_DEVICE_LANGUAGE,    // 0: is supported language
         USB_DEVICE_MANUFACTURER,// 1: Manufacturer
         USB_DEVICE_PRODUCT,     // 2: Product
         USB_DEVICE_SERIAL,      // 3: Serials, should use chip ID
@@ -163,7 +224,7 @@ typedef struct TU_ATTR_PACKED {
 static tinyusb_desc_webusb_url_t tinyusb_url_descriptor = {
         .bLength         = 3,
         .bDescriptorType = 3, // WEBUSB URL type
-        .bScheme         = 1, // URL Scheme Prefix: 0: "http://", 1: "https://", 255: ""
+        .bScheme         = 255, // URL Scheme Prefix: 0: "http://", 1: "https://", 255: ""
         .url             = ""
 };
 
@@ -198,7 +259,7 @@ static tinyusb_endpoints_usage_t tinyusb_endpoints;
 /**
  * @brief Invoked when received GET CONFIGURATION DESCRIPTOR.
  */
-uint8_t const *tud_descriptor_configuration_cb(uint8_t index)
+__attribute__ ((weak)) uint8_t const *tud_descriptor_configuration_cb(uint8_t index)
 {
     //log_d("%u", index);
     return tinyusb_config_descriptor;
@@ -207,7 +268,7 @@ uint8_t const *tud_descriptor_configuration_cb(uint8_t index)
 /**
  * @brief Invoked when received GET DEVICE DESCRIPTOR.
  */
-uint8_t const *tud_descriptor_device_cb(void)
+__attribute__ ((weak)) uint8_t const *tud_descriptor_device_cb(void)
 {
     //log_d("");
     return (uint8_t const *)&tinyusb_device_descriptor;
@@ -216,7 +277,7 @@ uint8_t const *tud_descriptor_device_cb(void)
 /**
  * @brief Invoked when received GET STRING DESCRIPTOR request.
  */
-uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid)
+__attribute__ ((weak)) uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid)
 {
     //log_d("%u (0x%x)", index, langid);
     static uint16_t _desc_str[127];
@@ -252,51 +313,46 @@ uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid)
  */
 uint8_t const * tud_descriptor_bos_cb(void)
 {
-    //log_d("");
+    //log_v("");
     return tinyusb_bos_descriptor;
 }
 
-__attribute__ ((weak)) bool tinyusb_vendor_control_request_cb(uint8_t rhport, tusb_control_request_t const * request){ return false; }
-__attribute__ ((weak)) bool tinyusb_vendor_control_complete_cb(uint8_t rhport, tusb_control_request_t const * request){ return true; }
+__attribute__ ((weak)) bool tinyusb_vendor_control_request_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request){ return false; }
 
 /**
  * @brief Handle WebUSB and Vendor requests.
  */
-bool tud_vendor_control_request_cb(uint8_t rhport, tusb_control_request_t const * request)
+bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request)
 {
     if(WEBUSB_ENABLED && (request->bRequest == VENDOR_REQUEST_WEBUSB
             || (request->bRequest == VENDOR_REQUEST_MICROSOFT && request->wIndex == 7))){
-        if(request->bRequest == VENDOR_REQUEST_WEBUSB){
-            // match vendor request in BOS descriptor
-            // Get landing page url
-            tinyusb_url_descriptor.bLength = 3 + strlen(WEBUSB_URL);
-            snprintf(tinyusb_url_descriptor.url, 127, "%s", WEBUSB_URL);
-            return tud_control_xfer(rhport, request, (void*) &tinyusb_url_descriptor, tinyusb_url_descriptor.bLength);
+        // we only care for SETUP stage
+        if (stage == CONTROL_STAGE_SETUP) {
+            if(request->bRequest == VENDOR_REQUEST_WEBUSB){
+                // match vendor request in BOS descriptor
+                // Get landing page url
+                tinyusb_url_descriptor.bLength = 3 + strlen(WEBUSB_URL);
+                snprintf(tinyusb_url_descriptor.url, 127, "%s", WEBUSB_URL);
+                return tud_control_xfer(rhport, request, (void*) &tinyusb_url_descriptor, tinyusb_url_descriptor.bLength);
+            }
+            // Get Microsoft OS 2.0 compatible descriptor
+            uint16_t total_len;
+            memcpy(&total_len, tinyusb_ms_os_20_descriptor + 8, 2);
+            return tud_control_xfer(rhport, request, (void*) tinyusb_ms_os_20_descriptor, total_len);
         }
-        // Get Microsoft OS 2.0 compatible descriptor
-        uint16_t total_len;
-        memcpy(&total_len, tinyusb_ms_os_20_descriptor + 8, 2);
-        return tud_control_xfer(rhport, request, (void*) tinyusb_ms_os_20_descriptor, total_len);
+        return true;
     }
-    return tinyusb_vendor_control_request_cb(rhport, request);
-}
-
-bool tud_vendor_control_complete_cb(uint8_t rhport, tusb_control_request_t const * request)
-{
-    if(!WEBUSB_ENABLED || !(request->bRequest == VENDOR_REQUEST_WEBUSB
-            || (request->bRequest == VENDOR_REQUEST_MICROSOFT && request->wIndex == 7))){
-        return tinyusb_vendor_control_complete_cb(rhport, request);
-    }
-    return true;
+    log_v("rhport: %u, stage: %u, type: 0x%x, request: 0x%x", rhport, stage, request->bmRequestType_bit.type, request->bRequest);
+    return tinyusb_vendor_control_request_cb(rhport, stage, request);
 }
 
 /*
  * Required Callbacks
  * */
 #if CFG_TUD_HID
-__attribute__ ((weak)) const uint8_t * tud_hid_descriptor_report_cb(void){return NULL;}
-__attribute__ ((weak)) uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen){return 0;}
-__attribute__ ((weak)) void tud_hid_set_report_cb(uint8_t report_id, hid_report_type_t report_type, const uint8_t * buffer, uint16_t bufsize){}
+__attribute__ ((weak)) const uint8_t * tud_hid_descriptor_report_cb(uint8_t itf){return NULL;}
+__attribute__ ((weak)) uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen){return 0;}
+__attribute__ ((weak)) void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, const uint8_t * buffer, uint16_t bufsize){}
 #endif
 #if CFG_TUD_MSC
 __attribute__ ((weak)) bool tud_msc_test_unit_ready_cb(uint8_t lun){return false;}
@@ -368,12 +424,6 @@ static bool tinyusb_load_enabled_interfaces(){
                 log_e("Descriptor Load Failed");
                 return false;
             } else {
-                if(i == USB_INTERFACE_CDC){
-                    if(!tinyusb_reserve_out_endpoint(3) ||!tinyusb_reserve_in_endpoint(4) || !tinyusb_reserve_in_endpoint(5)){
-                        log_e("CDC Reserve Endpoints Failed");
-                        return false;
-                    }
-                }
                 dst += len;
             }
         }
@@ -385,8 +435,8 @@ static bool tinyusb_load_enabled_interfaces(){
     };
     memcpy(tinyusb_config_descriptor, descriptor, TUD_CONFIG_DESC_LEN);
     if ((tinyusb_loaded_interfaces_mask == (BIT(USB_INTERFACE_CDC) | BIT(USB_INTERFACE_DFU))) || (tinyusb_loaded_interfaces_mask == BIT(USB_INTERFACE_CDC))) {
-        usb_persist_enabled = true;
-        log_d("USB Persist enabled");
+        //usb_persist_enabled = true;
+        //log_d("USB Persist enabled");
     }
     log_d("Load Done: if_num: %u, descr_len: %u, if_mask: 0x%x", tinyusb_loaded_interfaces_num, tinyusb_config_descriptor_len, tinyusb_loaded_interfaces_mask);
     return true;
@@ -442,6 +492,16 @@ static void tinyusb_apply_device_config(tinyusb_device_config_t *config){
         snprintf(WEBUSB_URL, 126, "%s", config->webusb_url);
     }
 
+    // Windows 10 will not recognize the CDC device if WebUSB is enabled and USB Class is not 2 (CDC)
+    if(
+        (tinyusb_loaded_interfaces_mask & BIT(USB_INTERFACE_CDC)) 
+        && config->webusb_enabled 
+        && (config->usb_class != TUSB_CLASS_CDC)
+    ){
+        config->usb_class = TUSB_CLASS_CDC;
+        config->usb_protocol = 0x00;
+    }
+
     WEBUSB_ENABLED            = config->webusb_enabled;
     USB_DEVICE_ATTRIBUTES     = config->usb_attributes;
     USB_DEVICE_POWER          = config->usb_power_ma;
@@ -465,10 +525,16 @@ static void IRAM_ATTR usb_persist_shutdown_handler(void)
             //USB CDC Download
             if (usb_persist_enabled) {
                 chip_usb_set_persist_flags(USBDC_PERSIST_ENA);
+            } else {
+                periph_module_reset(PERIPH_USB_MODULE);
+                periph_module_enable(PERIPH_USB_MODULE);
             }
             REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
         } else if (usb_persist_mode == RESTART_BOOTLOADER_DFU) {
             //DFU Download
+            // Reset USB Core
+            USB0.grstctl |= USB_CSFTRST;
+            while ((USB0.grstctl & USB_CSFTRST) == USB_CSFTRST){}
             chip_usb_set_persist_flags(USBDC_BOOT_DFU);
             REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
         } else if (usb_persist_enabled) {
@@ -488,48 +554,61 @@ static void usb_device_task(void *param) {
 /*
  * PUBLIC API
  * */
+static const char *tinyusb_interface_names[USB_INTERFACE_MAX] = {"MSC", "DFU", "HID", "VENDOR", "CDC", "MIDI", "CUSTOM"};
+
+static bool tinyusb_is_initialized = false;
 
 esp_err_t tinyusb_enable_interface(tinyusb_interface_t interface, uint16_t descriptor_len, tinyusb_descriptor_cb_t cb)
 {
-    if((interface >= USB_INTERFACE_MAX) || (tinyusb_loaded_interfaces_mask & (1U << interface))){
-        log_e("Interface %u not enabled", interface);
+    if(tinyusb_is_initialized){
+        log_e("TinyUSB has already started! Interface %s not enabled", (interface >= USB_INTERFACE_MAX)?"":tinyusb_interface_names[interface]);
         return ESP_FAIL;
     }
+    if((interface >= USB_INTERFACE_MAX) || (tinyusb_loaded_interfaces_mask & (1U << interface))){
+        log_e("Interface %s invalid or already enabled", (interface >= USB_INTERFACE_MAX)?"":tinyusb_interface_names[interface]);
+        return ESP_FAIL;
+    }
+    if(interface == USB_INTERFACE_CDC){
+        if(!tinyusb_reserve_out_endpoint(3) ||!tinyusb_reserve_in_endpoint(4) || !tinyusb_reserve_in_endpoint(5)){
+            log_e("CDC Reserve Endpoints Failed");
+            return ESP_FAIL;
+        }
+    }
     tinyusb_loaded_interfaces_mask |= (1U << interface);
     tinyusb_config_descriptor_len += descriptor_len;
     tinyusb_loaded_interfaces_callbacks[interface] = cb;
-    log_d("Interface %u enabled", interface);
+    log_d("Interface %s enabled", tinyusb_interface_names[interface]);
     return ESP_OK;
 }
 
 esp_err_t tinyusb_init(tinyusb_device_config_t *config) {
-    static bool initialized = false;
-    if(initialized){
+    if(tinyusb_is_initialized){
         return ESP_OK;
     }
-    initialized = true;
+    tinyusb_is_initialized = true;
     
-    tinyusb_endpoints.val = 0;
+    //tinyusb_endpoints.val = 0;
     tinyusb_apply_device_config(config);
     if (!tinyusb_load_enabled_interfaces()) {
-        initialized = false;
+        tinyusb_is_initialized = false;
         return ESP_FAIL;
     }
 
     bool usb_did_persist = (USB_WRAP.date.val == USBDC_PERSIST_ENA);
 
-    if(usb_did_persist && usb_persist_enabled){
+    //if(usb_did_persist && usb_persist_enabled){
         // Enable USB/IO_MUX peripheral reset, if coming from persistent reboot
         REG_CLR_BIT(RTC_CNTL_USB_CONF_REG, RTC_CNTL_IO_MUX_RESET_DISABLE);
         REG_CLR_BIT(RTC_CNTL_USB_CONF_REG, RTC_CNTL_USB_RESET_DISABLE);
-    } else {
+    //} else 
+    if(!usb_did_persist || !usb_persist_enabled){
         // Reset USB module
         periph_module_reset(PERIPH_USB_MODULE);
         periph_module_enable(PERIPH_USB_MODULE);
     }
 
     if (esp_register_shutdown_handler(usb_persist_shutdown_handler) != ESP_OK) {
-        initialized = false;
+        tinyusb_is_initialized = false;
         return ESP_FAIL;
     }
 
@@ -538,7 +617,7 @@ esp_err_t tinyusb_init(tinyusb_device_config_t *config) {
     };
     esp_err_t err = tinyusb_driver_install(&tusb_cfg);
     if (err != ESP_OK) {
-        initialized = false;
+        tinyusb_is_initialized = false;
         return err;
     }
     xTaskCreate(usb_device_task, "usbd", 4096, NULL, configMAX_PRIORITIES - 1, NULL);
@@ -614,84 +693,4 @@ uint8_t tinyusb_get_free_out_endpoint(void){
     return 0;
 }
 
-/*
-void usb_dw_reg_dump(void)
-{
-#define USB_PRINT_REG(r) printf("USB0." #r " = 0x%x;\n", USB0.r)
-#define USB_PRINT_IREG(i, r) printf("USB0.in_ep_reg[%u]." #r " = 0x%x;\n", i, USB0.in_ep_reg[i].r)
-#define USB_PRINT_OREG(i, r) printf("USB0.out_ep_reg[%u]." #r " = 0x%x;\n", i, USB0.out_ep_reg[i].r)
-    uint8_t i;
-    USB_PRINT_REG(gotgctl);
-    USB_PRINT_REG(gotgint);
-    USB_PRINT_REG(gahbcfg);
-    USB_PRINT_REG(gusbcfg);
-    USB_PRINT_REG(grstctl);
-    USB_PRINT_REG(gintsts);
-    USB_PRINT_REG(gintmsk);
-    USB_PRINT_REG(grxstsr);
-    USB_PRINT_REG(grxstsp);
-    USB_PRINT_REG(grxfsiz);
-    USB_PRINT_REG(gnptxsts);
-    USB_PRINT_REG(gpvndctl);
-    USB_PRINT_REG(ggpio);
-    USB_PRINT_REG(guid);
-    USB_PRINT_REG(gsnpsid);
-    USB_PRINT_REG(ghwcfg1);
-    USB_PRINT_REG(ghwcfg2);
-    USB_PRINT_REG(ghwcfg3);
-    USB_PRINT_REG(ghwcfg4);
-    USB_PRINT_REG(glpmcfg);
-    USB_PRINT_REG(gpwrdn);
-    USB_PRINT_REG(gdfifocfg);
-    USB_PRINT_REG(gadpctl);
-    USB_PRINT_REG(hptxfsiz);
-    USB_PRINT_REG(hcfg);
-    USB_PRINT_REG(hfir);
-    USB_PRINT_REG(hfnum);
-    USB_PRINT_REG(hptxsts);
-    USB_PRINT_REG(haint);
-    USB_PRINT_REG(haintmsk);
-    USB_PRINT_REG(hflbaddr);
-    USB_PRINT_REG(hprt);
-    USB_PRINT_REG(dcfg);
-    USB_PRINT_REG(dctl);
-    USB_PRINT_REG(dsts);
-    USB_PRINT_REG(diepmsk);
-    USB_PRINT_REG(doepmsk);
-    USB_PRINT_REG(daint);
-    USB_PRINT_REG(daintmsk);
-    USB_PRINT_REG(dtknqr1);
-    USB_PRINT_REG(dtknqr2);
-    USB_PRINT_REG(dvbusdis);
-    USB_PRINT_REG(dvbuspulse);
-    USB_PRINT_REG(dtknqr3_dthrctl);
-    USB_PRINT_REG(dtknqr4_fifoemptymsk);
-    USB_PRINT_REG(deachint);
-    USB_PRINT_REG(deachintmsk);
-    USB_PRINT_REG(pcgctrl);
-    USB_PRINT_REG(pcgctrl1);
-    USB_PRINT_REG(gnptxfsiz);
-    for (i = 0; i < 4; i++) {
-        printf("USB0.dieptxf[%u] = 0x%x;\n", i, USB0.dieptxf[i]);
-    }
-//    for (i = 0; i < 16; i++) {
-//        printf("USB0.diepeachintmsk[%u] = 0x%x;\n", i, USB0.diepeachintmsk[i]);
-//    }
-//    for (i = 0; i < 16; i++) {
-//        printf("USB0.doepeachintmsk[%u] = 0x%x;\n", i, USB0.doepeachintmsk[i]);
-//    }
-    for (i = 0; i < 7; i++) {
-        printf("// EP %u:\n", i);
-        USB_PRINT_IREG(i, diepctl);
-        USB_PRINT_IREG(i, diepint);
-        USB_PRINT_IREG(i, dieptsiz);
-        USB_PRINT_IREG(i, diepdma);
-        USB_PRINT_IREG(i, dtxfsts);
-        USB_PRINT_OREG(i, doepctl);
-        USB_PRINT_OREG(i, doepint);
-        USB_PRINT_OREG(i, doeptsiz);
-        USB_PRINT_OREG(i, doepdma);
-    }
-}
- */
-#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_TINYUSB_ENABLED */

cores/esp32/esp32-hal-tinyusb.h

@@ -16,13 +16,18 @@
 #include "esp32-hal.h"
 
 #if CONFIG_IDF_TARGET_ESP32S2
-#if CONFIG_USB_ENABLED
+#if CONFIG_TINYUSB_ENABLED
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "tinyusb.h"
+#include "tusb.h"
+#include "tusb_option.h"
+#include "tusb_config.h"
+
+#define USB_ESPRESSIF_VID 0x303A
+#define USB_STRING_DESCRIPTOR_ARRAY_SIZE 10
 
 typedef struct {
         uint16_t vid;
@@ -46,10 +51,10 @@ typedef struct {
 #define TINYUSB_CONFIG_DEFAULT() {                                      \
         .vid = USB_ESPRESSIF_VID,                                       \
         .pid = 0x0002,                                                  \
-        .product_name = CONFIG_USB_DESC_PRODUCT_STRING,                 \
-        .manufacturer_name = CONFIG_USB_DESC_MANUFACTURER_STRING,       \
-        .serial_number = CONFIG_USB_DESC_SERIAL_STRING,                 \
-        .fw_version = CONFIG_USB_DESC_BCDDEVICE,                        \
+        .product_name = CONFIG_TINYUSB_DESC_PRODUCT_STRING,                 \
+        .manufacturer_name = CONFIG_TINYUSB_DESC_MANUFACTURER_STRING,       \
+        .serial_number = CONFIG_TINYUSB_DESC_SERIAL_STRING,                 \
+        .fw_version = CONFIG_TINYUSB_DESC_BCDDEVICE,                        \
         .usb_version = 0x0200,                                          \
         .usb_class = TUSB_CLASS_MISC,                                   \
         .usb_subclass = MISC_SUBCLASS_COMMON,                           \
@@ -77,11 +82,11 @@ void usb_persist_restart(restart_type_t mode);
 
 // The following definitions and functions are to be used only by the drivers
 typedef enum {
-    USB_INTERFACE_CDC,
+    USB_INTERFACE_MSC,
     USB_INTERFACE_DFU,
     USB_INTERFACE_HID,
     USB_INTERFACE_VENDOR,
-    USB_INTERFACE_MSC,
+    USB_INTERFACE_CDC,
     USB_INTERFACE_MIDI,
     USB_INTERFACE_CUSTOM,
     USB_INTERFACE_MAX
@@ -99,5 +104,5 @@ uint8_t tinyusb_get_free_out_endpoint(void);
 }
 #endif
 
-#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_TINYUSB_ENABLED */
 #endif /* CONFIG_IDF_TARGET_ESP32S2 */

cores/esp32/esp32-hal-touch.c

@@ -12,15 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "esp32-hal.h"
 #include "esp32-hal-touch.h"
+#ifndef CONFIG_IDF_TARGET_ESP32C3
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_attr.h"
 #include "soc/rtc_io_reg.h"
-#include "soc/rtc_cntl_reg.h"
 #include "soc/sens_reg.h"
 #include "soc/sens_struct.h"
+#include "soc/rtc_cntl_reg.h"
 #include "driver/touch_sensor.h"
 
 #include "esp_system.h"
@@ -32,14 +32,13 @@
 #include "esp32s2/rom/ets_sys.h"
 #include "esp_intr_alloc.h"
 #include "soc/periph_defs.h"
-#else
+#else 
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
 #else // ESP32 Before IDF 4.0
 #include "rom/ets_sys.h"
 #include "esp_intr.h"
 #endif
-#include "esp32-hal-gpio.h"
 
 static uint16_t __touchSleepCycles = 0x1000;
 static uint16_t __touchMeasureCycles = 0x1000;
@@ -96,6 +95,7 @@ void __touchInit()
     SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL2_REG, SENS_TOUCH_MEAS_EN_CLR);
     //clear touch enable
     WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG, 0x0);
+    SET_PERI_REG_MASK(RTC_CNTL_STATE0_REG, RTC_CNTL_TOUCH_SLP_TIMER_EN);
     __touchSetCycles(__touchMeasureCycles, __touchSleepCycles);
     esp_intr_alloc(ETS_RTC_CORE_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, __touchISR, NULL, &touch_intr_handle);
 #else
@@ -227,3 +227,4 @@ void __touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t thresh
 extern uint16_t touchRead(uint8_t pin) __attribute__ ((weak, alias("__touchRead")));
 extern void touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t threshold) __attribute__ ((weak, alias("__touchAttachInterrupt")));
 extern void touchSetCycles(uint16_t measure, uint16_t sleep) __attribute__ ((weak, alias("__touchSetCycles")));
+#endif

cores/esp32/esp32-hal-touch.h

@@ -24,7 +24,7 @@
 extern "C" {
 #endif
 
-#include <stdint.h>
+#include "esp32-hal.h"
 
 /*
  * Set cycles that measurement operation takes

cores/esp32/esp32-hal-uart.c

@@ -0,0 +1,582 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "esp32-hal-uart.h"
+#include "esp32-hal.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+
+#include "driver/uart.h"
+#include "hal/uart_ll.h"
+#include "soc/soc_caps.h"
+#include "soc/uart_struct.h"
+
+static int s_uart_debug_nr = 0;
+
+struct uart_struct_t {
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    xSemaphoreHandle lock;
+#endif
+
+    uint8_t num;
+    bool has_peek;
+    uint8_t peek_byte;
+
+};
+
+#if CONFIG_DISABLE_HAL_LOCKS
+
+#define UART_MUTEX_LOCK()
+#define UART_MUTEX_UNLOCK()
+
+static uart_t _uart_bus_array[] = {
+    {0, false, 0},
+#if SOC_UART_NUM > 1
+    {1, false, 0},
+#endif
+#if SOC_UART_NUM > 2
+    {2, false, 0},
+#endif
+};
+
+#else
+
+#define UART_MUTEX_LOCK()    do {} while (xSemaphoreTake(uart->lock, portMAX_DELAY) != pdPASS)
+#define UART_MUTEX_UNLOCK()  xSemaphoreGive(uart->lock)
+
+static uart_t _uart_bus_array[] = {
+    {NULL, 0, false, 0},
+#if SOC_UART_NUM > 1
+    {NULL, 1, false, 0},
+#endif
+#if SOC_UART_NUM > 2
+    {NULL, 2, false, 0},
+#endif
+};
+
+#endif
+
+bool uartIsDriverInstalled(uart_t* uart) 
+{
+    if(uart == NULL) {
+        return 0;
+    }
+
+    if (uart_is_driver_installed(uart->num)) {
+        return true;
+    }
+    return false;
+}
+
+void uartSetPins(uart_t* uart, uint8_t rxPin, uint8_t txPin)
+{
+    if(uart == NULL || rxPin >= SOC_GPIO_PIN_COUNT || txPin >= SOC_GPIO_PIN_COUNT) {
+        return;
+    }
+    UART_MUTEX_LOCK();
+    ESP_ERROR_CHECK(uart_set_pin(uart->num, txPin, rxPin, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE)); 
+    UART_MUTEX_UNLOCK();
+    
+}
+
+
+uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t queueLen, bool inverted, uint8_t rxfifo_full_thrhd)
+{
+    if(uart_nr >= SOC_UART_NUM) {
+        return NULL;
+    }
+
+    if(rxPin == -1 && txPin == -1) {
+        return NULL;
+    }
+
+    uart_t* uart = &_uart_bus_array[uart_nr];
+
+    if (uart_is_driver_installed(uart_nr)) {
+        uartEnd(uart);
+    }
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(uart->lock == NULL) {
+        uart->lock = xSemaphoreCreateMutex();
+        if(uart->lock == NULL) {
+            return NULL;
+        }
+    }
+#endif
+
+    UART_MUTEX_LOCK();
+
+    uart_config_t uart_config;
+    uart_config.baud_rate = baudrate;
+    uart_config.data_bits = (config & 0xc) >> 2;
+    uart_config.parity = (config & 0x3);
+    uart_config.stop_bits = (config & 0x30) >> 4;
+    uart_config.flow_ctrl = UART_HW_FLOWCTRL_DISABLE;
+    uart_config.rx_flow_ctrl_thresh = rxfifo_full_thrhd;
+    uart_config.source_clk = UART_SCLK_APB;
+
+
+    ESP_ERROR_CHECK(uart_driver_install(uart_nr, 2*queueLen, 0, 0, NULL, 0));
+    ESP_ERROR_CHECK(uart_param_config(uart_nr, &uart_config));
+    ESP_ERROR_CHECK(uart_set_pin(uart_nr, txPin, rxPin, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
+
+    // Is it right or the idea is to swap rx and tx pins? 
+    if (inverted) {
+        // invert signal for both Rx and Tx
+        ESP_ERROR_CHECK(uart_set_line_inverse(uart_nr, UART_SIGNAL_TXD_INV | UART_SIGNAL_RXD_INV));    
+    }
+
+    UART_MUTEX_UNLOCK();
+
+    uartFlush(uart);
+    return uart;
+}
+
+void uartEnd(uart_t* uart)
+{
+    if(uart == NULL) {
+        return;
+    }
+   
+    UART_MUTEX_LOCK();
+    uart_driver_delete(uart->num);
+    UART_MUTEX_UNLOCK();
+}
+
+
+void uartSetRxInvert(uart_t* uart, bool invert)
+{
+    if (uart == NULL)
+        return;
+#if 0
+    // POTENTIAL ISSUE :: original code only set/reset rxd_inv bit 
+    // IDF or LL set/reset the whole inv_mask!
+    if (invert)
+        ESP_ERROR_CHECK(uart_set_line_inverse(uart->num, UART_SIGNAL_RXD_INV));
+    else
+        ESP_ERROR_CHECK(uart_set_line_inverse(uart->num, UART_SIGNAL_INV_DISABLE));
+    
+#else
+    // this implementation is better over IDF API because it only affects RXD
+    // this is supported in ESP32, ESP32-S2 and ESP32-C3
+    uart_dev_t *hw = UART_LL_GET_HW(uart->num);
+    if (invert)
+        hw->conf0.rxd_inv = 1;
+    else
+        hw->conf0.rxd_inv = 0;
+#endif 
+}
+
+
+uint32_t uartAvailable(uart_t* uart)
+{
+
+    if(uart == NULL) {
+        return 0;
+    }
+
+    UART_MUTEX_LOCK();
+    size_t available;
+    uart_get_buffered_data_len(uart->num, &available);
+    if (uart->has_peek) available++;
+    UART_MUTEX_UNLOCK();
+    return available;
+}
+
+
+uint32_t uartAvailableForWrite(uart_t* uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+    UART_MUTEX_LOCK();
+    uint32_t available =  uart_ll_get_txfifo_len(UART_LL_GET_HW(uart->num));  
+    UART_MUTEX_UNLOCK();
+    return available;
+}
+
+
+uint8_t uartRead(uart_t* uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+    uint8_t c = 0;
+
+    UART_MUTEX_LOCK();
+
+    if (uart->has_peek) {
+      uart->has_peek = false;
+      c = uart->peek_byte;
+    } else {
+
+        int len = uart_read_bytes(uart->num, &c, 1, 20 / portTICK_RATE_MS);
+        if (len == 0) {
+            c  = 0;
+        }
+    }
+    UART_MUTEX_UNLOCK();
+    return c;
+}
+
+uint8_t uartPeek(uart_t* uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+    uint8_t c = 0;
+
+    UART_MUTEX_LOCK();
+
+    if (uart->has_peek) {
+      c = uart->peek_byte;
+    } else {
+        int len = uart_read_bytes(uart->num, &c, 1, 20 / portTICK_RATE_MS);
+        if (len == 0) {
+            c  = 0;
+        } else {
+            uart->has_peek = true;
+            uart->peek_byte = c;
+        }
+    }
+    UART_MUTEX_UNLOCK();
+    return c;
+}
+
+void uartWrite(uart_t* uart, uint8_t c)
+{
+    if(uart == NULL) {
+        return;
+    }
+    UART_MUTEX_LOCK();
+    uart_write_bytes(uart->num, &c, 1);
+    UART_MUTEX_UNLOCK();
+}
+
+void uartWriteBuf(uart_t* uart, const uint8_t * data, size_t len)
+{
+    if(uart == NULL || data == NULL || !len) {
+        return;
+    }
+
+    UART_MUTEX_LOCK();
+    uart_write_bytes(uart->num, data, len);
+    UART_MUTEX_UNLOCK();
+}
+
+void uartFlush(uart_t* uart)
+{
+    uartFlushTxOnly(uart, true);
+}
+
+void uartFlushTxOnly(uart_t* uart, bool txOnly)
+{
+    if(uart == NULL) {
+        return;
+    }
+    
+    UART_MUTEX_LOCK();
+    ESP_ERROR_CHECK(uart_wait_tx_done(uart->num, portMAX_DELAY));
+
+    if ( !txOnly ) {
+        ESP_ERROR_CHECK(uart_flush_input(uart->num));
+    }
+    UART_MUTEX_UNLOCK();
+}
+
+void uartSetBaudRate(uart_t* uart, uint32_t baud_rate)
+{
+    if(uart == NULL) {
+        return;
+    }
+    UART_MUTEX_LOCK();
+    uart_ll_set_baudrate(UART_LL_GET_HW(uart->num), baud_rate);
+    UART_MUTEX_UNLOCK();
+}
+
+uint32_t uartGetBaudRate(uart_t* uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+
+    UART_MUTEX_LOCK();
+    uint32_t baud_rate = uart_ll_get_baudrate(UART_LL_GET_HW(uart->num));
+    UART_MUTEX_UNLOCK();
+    return baud_rate;
+}
+
+static void ARDUINO_ISR_ATTR uart0_write_char(char c)
+{
+    while (uart_ll_get_txfifo_len(&UART0) == 0);
+    uart_ll_write_txfifo(&UART0, (const uint8_t *) &c, 1);
+}
+
+#if SOC_UART_NUM > 1
+static void ARDUINO_ISR_ATTR uart1_write_char(char c)
+{
+    while (uart_ll_get_txfifo_len(&UART1) == 0);
+    uart_ll_write_txfifo(&UART1, (const uint8_t *) &c, 1);
+}
+#endif
+
+#if SOC_UART_NUM > 2
+static void ARDUINO_ISR_ATTR uart2_write_char(char c)
+{
+    while (uart_ll_get_txfifo_len(&UART2) == 0);
+    uart_ll_write_txfifo(&UART2, (const uint8_t *) &c, 1);
+}
+#endif
+
+void uart_install_putc()
+{
+    switch(s_uart_debug_nr) {
+    case 0:
+        ets_install_putc1((void (*)(char)) &uart0_write_char);
+        break;
+#if SOC_UART_NUM > 1
+    case 1:
+        ets_install_putc1((void (*)(char)) &uart1_write_char);
+        break;
+#endif
+#if SOC_UART_NUM > 2
+    case 2:
+        ets_install_putc1((void (*)(char)) &uart2_write_char);
+        break;
+#endif
+    default:
+        ets_install_putc1(NULL);
+        break;
+    }
+}
+
+void uartSetDebug(uart_t* uart)
+{
+    if(uart == NULL || uart->num >= SOC_UART_NUM) {
+        s_uart_debug_nr = -1;
+    } else {
+        s_uart_debug_nr = uart->num;
+    }
+    uart_install_putc();
+}
+
+int uartGetDebug()
+{
+    return s_uart_debug_nr;
+}
+
+int log_printf(const char *format, ...)
+{
+    static char loc_buf[64];
+    char * temp = loc_buf;
+    int len;
+    va_list arg;
+    va_list copy;
+    va_start(arg, format);
+    va_copy(copy, arg);
+    len = vsnprintf(NULL, 0, format, arg);
+    va_end(copy);
+    if(len >= sizeof(loc_buf)){
+        temp = (char*)malloc(len+1);
+        if(temp == NULL) {
+            return 0;
+        }
+    }
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(s_uart_debug_nr != -1 && _uart_bus_array[s_uart_debug_nr].lock){
+        xSemaphoreTake(_uart_bus_array[s_uart_debug_nr].lock, portMAX_DELAY);
+    }
+#endif
+    
+    vsnprintf(temp, len+1, format, arg);
+    ets_printf("%s", temp);
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(s_uart_debug_nr != -1 && _uart_bus_array[s_uart_debug_nr].lock){
+        xSemaphoreGive(_uart_bus_array[s_uart_debug_nr].lock);
+    }
+#endif
+    va_end(arg);
+    if(len >= sizeof(loc_buf)){
+        free(temp);
+    }
+    return len;
+}
+
+
+static void log_print_buf_line(const uint8_t *b, size_t len, size_t total_len){
+    for(size_t i = 0; i<len; i++){
+        log_printf("%s0x%02x,",i?" ":"", b[i]);
+    }
+    if(total_len > 16){
+        for(size_t i = len; i<16; i++){
+            log_printf("      ");
+        }
+        log_printf("    // ");
+    } else {
+        log_printf(" // ");
+    }
+    for(size_t i = 0; i<len; i++){
+        log_printf("%c",((b[i] >= 0x20) && (b[i] < 0x80))?b[i]:'.');
+    }
+    log_printf("\n");
+}
+
+void log_print_buf(const uint8_t *b, size_t len){
+    if(!len || !b){
+        return;
+    }
+    for(size_t i = 0; i<len; i+=16){
+        if(len > 16){
+            log_printf("/* 0x%04X */ ", i);
+        }
+        log_print_buf_line(b+i, ((len-i)<16)?(len - i):16, len);
+    }
+}
+
+/*
+ * if enough pulses are detected return the minimum high pulse duration + minimum low pulse duration divided by two. 
+ * This equals one bit period. If flag is true the function return inmediately, otherwise it waits for enough pulses.
+ */
+unsigned long uartBaudrateDetect(uart_t *uart, bool flg)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+
+    uart_dev_t *hw = UART_LL_GET_HW(uart->num);
+
+    while(hw->rxd_cnt.edge_cnt < 30) { // UART_PULSE_NUM(uart_num)
+        if(flg) return 0;
+        ets_delay_us(1000);
+    }
+
+    UART_MUTEX_LOCK();
+    //log_i("lowpulse_min_cnt = %d hightpulse_min_cnt = %d", hw->lowpulse.min_cnt, hw->highpulse.min_cnt);
+    unsigned long ret = ((hw->lowpulse.min_cnt + hw->highpulse.min_cnt) >> 1);
+    UART_MUTEX_UNLOCK();
+
+    return ret;
+}
+
+
+/*
+ * To start detection of baud rate with the uart the auto_baud.en bit needs to be cleared and set. The bit period is 
+ * detected calling uartBadrateDetect(). The raw baudrate is computed using the UART_CLK_FREQ. The raw baudrate is 
+ * rounded to the closed real baudrate.
+ * 
+ * ESP32-C3 reports wrong baud rate detection as shown below:
+ * 
+ * This will help in a future recall for the C3.
+ * Baud Sent:          Baud Read:
+ *  300        -->       19536
+ * 2400        -->       19536
+ * 4800        -->       19536 
+ * 9600        -->       28818 
+ * 19200       -->       57678
+ * 38400       -->       115440
+ * 57600       -->       173535
+ * 115200      -->       347826
+ * 230400      -->       701754
+ * 
+ * 
+*/
+void uartStartDetectBaudrate(uart_t *uart) {
+    if(uart == NULL) {
+        return;
+    }
+
+    uart_dev_t *hw = UART_LL_GET_HW(uart->num);
+
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+    
+    // ESP32-C3 requires further testing
+    // Baud rate detection returns wrong values 
+   
+    log_e("ESP32-C3 baud rate detection is not supported.");
+    return;
+
+    // Code bellow for C3 kept for future recall
+    //hw->rx_filt.glitch_filt = 0x08;
+    //hw->rx_filt.glitch_filt_en = 1;
+    //hw->conf0.autobaud_en = 0;
+    //hw->conf0.autobaud_en = 1;
+
+#else
+    hw->auto_baud.glitch_filt = 0x08;
+    hw->auto_baud.en = 0;
+    hw->auto_baud.en = 1;
+#endif
+}
+ 
+unsigned long
+uartDetectBaudrate(uart_t *uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+
+#ifndef CONFIG_IDF_TARGET_ESP32C3    // ESP32-C3 requires further testing - Baud rate detection returns wrong values 
+
+    static bool uartStateDetectingBaudrate = false;
+    uart_dev_t *hw = UART_LL_GET_HW(uart->num);
+
+    if(!uartStateDetectingBaudrate) {
+        uartStartDetectBaudrate(uart);
+        uartStateDetectingBaudrate = true;
+    }
+
+    unsigned long divisor = uartBaudrateDetect(uart, true);
+    if (!divisor) {
+        return 0;
+    }
+    //  log_i(...) below has been used to check C3 baud rate detection results
+    //log_i("Divisor = %d\n", divisor);
+    //log_i("BAUD RATE based on Positive Pulse %d\n", getApbFrequency()/((hw->pospulse.min_cnt + 1)/2));
+    //log_i("BAUD RATE based on Negative Pulse %d\n", getApbFrequency()/((hw->negpulse.min_cnt + 1)/2));
+
+
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+    //hw->conf0.autobaud_en = 0;
+#else
+    hw->auto_baud.en = 0;
+#endif
+    uartStateDetectingBaudrate = false; // Initialize for the next round
+
+    unsigned long baudrate = getApbFrequency() / divisor;
+    //log_i("APB_FREQ = %d\nraw baudrate detected = %d", getApbFrequency(), baudrate);
+
+    static const unsigned long default_rates[] = {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 74880, 115200, 230400, 256000, 460800, 921600, 1843200, 3686400};
+
+    size_t i;
+    for (i = 1; i < sizeof(default_rates) / sizeof(default_rates[0]) - 1; i++)	// find the nearest real baudrate
+    {
+        if (baudrate <= default_rates[i])
+        {
+            if (baudrate - default_rates[i - 1] < default_rates[i] - baudrate) {
+                i--;
+            }
+            break;
+        }
+    }
+
+    return default_rates[i];
+#else
+    log_e("ESP32-C3 baud rate detection is not supported.");
+    return 0;
+#endif
+}

cores/esp32/esp32-hal-uart.h

@@ -0,0 +1,87 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef MAIN_ESP32_HAL_UART_H_
+#define MAIN_ESP32_HAL_UART_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#define SERIAL_5N1 0x8000010
+#define SERIAL_6N1 0x8000014
+#define SERIAL_7N1 0x8000018
+#define SERIAL_8N1 0x800001c
+#define SERIAL_5N2 0x8000030
+#define SERIAL_6N2 0x8000034
+#define SERIAL_7N2 0x8000038
+#define SERIAL_8N2 0x800003c
+#define SERIAL_5E1 0x8000012
+#define SERIAL_6E1 0x8000016
+#define SERIAL_7E1 0x800001a
+#define SERIAL_8E1 0x800001e
+#define SERIAL_5E2 0x8000032
+#define SERIAL_6E2 0x8000036
+#define SERIAL_7E2 0x800003a
+#define SERIAL_8E2 0x800003e
+#define SERIAL_5O1 0x8000013
+#define SERIAL_6O1 0x8000017
+#define SERIAL_7O1 0x800001b
+#define SERIAL_8O1 0x800001f
+#define SERIAL_5O2 0x8000033
+#define SERIAL_6O2 0x8000037
+#define SERIAL_7O2 0x800003b
+#define SERIAL_8O2 0x800003f
+
+struct uart_struct_t;
+typedef struct uart_struct_t uart_t;
+
+uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t queueLen, bool inverted, uint8_t rxfifo_full_thrhd);
+void uartEnd(uart_t* uart);
+
+uint32_t uartAvailable(uart_t* uart);
+uint32_t uartAvailableForWrite(uart_t* uart);
+uint8_t uartRead(uart_t* uart);
+uint8_t uartPeek(uart_t* uart);
+
+void uartWrite(uart_t* uart, uint8_t c);
+void uartWriteBuf(uart_t* uart, const uint8_t * data, size_t len);
+
+void uartFlush(uart_t* uart);
+void uartFlushTxOnly(uart_t* uart, bool txOnly );
+
+void uartSetBaudRate(uart_t* uart, uint32_t baud_rate);
+uint32_t uartGetBaudRate(uart_t* uart);
+
+void uartSetRxInvert(uart_t* uart, bool invert);
+
+void uartSetDebug(uart_t* uart);
+int uartGetDebug();
+
+bool uartIsDriverInstalled(uart_t* uart);
+void uartSetPins(uart_t* uart, uint8_t rxPin, uint8_t txPin);
+
+void uartStartDetectBaudrate(uart_t *uart);
+unsigned long uartDetectBaudrate(uart_t *uart);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAIN_ESP32_HAL_UART_H_ */

cores/esp32/esp32-hal.h

@@ -20,21 +20,34 @@
 #ifndef HAL_ESP32_HAL_H_
 #define HAL_ESP32_HAL_H_
 
-//#include <stdint.h>
-//#include <stdbool.h>
-//#include <stdio.h>
-//#include <stdlib.h>
-//#include <stdarg.h>
-//#include <inttypes.h>
-//#include <string.h>
-//#include <math.h>
-//#include "sdkconfig.h"
-//#include "esp_system.h"
-//#include "esp_sleep.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <string.h>
+#include <math.h>
+#include "sdkconfig.h"
+#include "esp_system.h"
+#include "esp_sleep.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+#include "freertos/event_groups.h"
 
-//#ifdef __cplusplus
-//extern "C" {
-//#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef F_CPU
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#define F_CPU (CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ * 1000000U)
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define F_CPU (CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ * 1000000U)
+#endif
+#endif
 
 #if CONFIG_ARDUINO_ISR_IRAM
 #define ARDUINO_ISR_ATTR IRAM_ATTR
@@ -44,32 +57,86 @@
 #define ARDUINO_ISR_FLAG (0)
 #endif
 
-////forward declaration from freertos/portmacro.h
-//void vPortYield(void);
-//#define optimistic_yield(u)
+#ifndef ARDUINO_RUNNING_CORE
+#define ARDUINO_RUNNING_CORE CONFIG_ARDUINO_RUNNING_CORE
+#endif
+
+#ifndef ARDUINO_EVENT_RUNNING_CORE
+#define ARDUINO_EVENT_RUNNING_CORE CONFIG_ARDUINO_EVENT_RUNNING_CORE
+#endif
+
+//forward declaration from freertos/portmacro.h
+void vPortYield(void);
+void yield(void);
+#define optimistic_yield(u)
 
 #define ESP_REG(addr) *((volatile uint32_t *)(addr))
 #define NOP() asm volatile ("nop")
 
-////#include "esp32-hal-log.h"
-////#include "esp32-hal-matrix.h"
-////#include "esp32-hal-gpio.h"
-////#include "esp32-hal-touch.h"
-////#include "esp32-hal-dac.h"
-////#include "esp32-hal-adc.h"
-////#include "esp32-hal-spi.h"
-////#include "esp32-hal-i2c.h"
-////#include "esp32-hal-ledc.h"
-////#include "esp32-hal-rmt.h"
-////#include "esp32-hal-sigmadelta.h"
-////#include "esp32-hal-psram.h"
-////#include "esp32-hal-cpu.h"
+#include "esp32-hal-log.h"
+#include "esp32-hal-matrix.h"
+#include "esp32-hal-uart.h"
+#include "esp32-hal-gpio.h"
+#include "esp32-hal-touch.h"
+#include "esp32-hal-dac.h"
+#include "esp32-hal-adc.h"
+#include "esp32-hal-spi.h"
+#include "esp32-hal-i2c.h"
+#include "esp32-hal-ledc.h"
+#include "esp32-hal-rmt.h"
+#include "esp32-hal-sigmadelta.h"
+#include "esp32-hal-timer.h"
+#include "esp32-hal-bt.h"
+#include "esp32-hal-psram.h"
+#include "esp32-hal-cpu.h"
 
-////returns chip temperature in Celsius
-//float temperatureRead();
+void analogWrite(uint8_t pin, int value);
 
-//#ifdef __cplusplus
-//}
-//#endif
+//returns chip temperature in Celsius
+float temperatureRead();
+
+#if CONFIG_AUTOSTART_ARDUINO
+//enable/disable WDT for Arduino's setup and loop functions
+void enableLoopWDT();
+void disableLoopWDT();
+//feed WDT for the loop task
+void feedLoopWDT();
+#endif
+
+//enable/disable WDT for the IDLE task on Core 0 (SYSTEM)
+void enableCore0WDT();
+void disableCore0WDT();
+#ifndef CONFIG_FREERTOS_UNICORE
+//enable/disable WDT for the IDLE task on Core 1 (Arduino)
+void enableCore1WDT();
+void disableCore1WDT();
+#endif
+
+//if xCoreID < 0 or CPU is unicore, it will use xTaskCreate, else xTaskCreatePinnedToCore
+//allows to easily handle all possible situations without repetitive code
+BaseType_t xTaskCreateUniversal( TaskFunction_t pxTaskCode,
+                        const char * const pcName,
+                        const uint32_t usStackDepth,
+                        void * const pvParameters,
+                        UBaseType_t uxPriority,
+                        TaskHandle_t * const pxCreatedTask,
+                        const BaseType_t xCoreID );
+
+unsigned long micros();
+unsigned long millis();
+void delay(uint32_t);
+void delayMicroseconds(uint32_t us);
+
+#if !CONFIG_ESP32_PHY_AUTO_INIT
+void arduino_phy_init();
+#endif
+
+#if !CONFIG_AUTOSTART_ARDUINO
+void initArduino();
+#endif
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* HAL_ESP32_HAL_H_ */

cores/esp32/firmware_msc_fat.c

@@ -0,0 +1,204 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "firmware_msc_fat.h"
+//copy up to max_len chars from src to dst and do not terminate
+static size_t cplstr(void *dst, const void * src, size_t max_len){
+    if(!src || !dst || !max_len){
+        return 0;
+    }
+    size_t l = strlen((const char *)src);
+    if(l > max_len){
+        l = max_len;
+    }
+    memcpy(dst, src, l);
+    return l;
+}
+
+//copy up to max_len chars from src to dst, adding spaces up to max_len. do not terminate
+static void cplstrsp(void *dst, const void * src, size_t max_len){
+    size_t l = cplstr(dst, src, max_len);
+    for(; l < max_len; l++){
+      ((uint8_t*)dst)[l] = 0x20;
+    }
+}
+
+// FAT12
+static const char * FAT12_FILE_SYSTEM_TYPE = "FAT12";
+
+static uint16_t fat12_sectors_per_alloc_table(uint32_t sector_num){
+  uint32_t required_bytes = (((sector_num * 3)+1)/2);
+  return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & (DISK_SECTOR_SIZE - 1))?1:0);
+}
+
+static uint8_t * fat12_add_table(uint8_t * dst, fat_boot_sector_t * boot){
+  memset(dst+DISK_SECTOR_SIZE, 0, boot->sectors_per_alloc_table * DISK_SECTOR_SIZE);
+  uint8_t * d = dst + DISK_SECTOR_SIZE;
+  d[0] = 0xF8;
+  d[1] = 0xFF;
+  d[2] = 0xFF;
+  return d;
+}
+
+static void fat12_set_table_index(uint8_t * table, uint16_t index, uint16_t value){
+  uint16_t offset = (index >> 1) * 3;
+  uint8_t * data = table + offset;
+  if(index & 1){
+    data[2] = (value >> 4) & 0xFF;
+    data[1] = (data[1] & 0xF) | ((value & 0xF) << 4);
+  } else {
+    data[0] = value & 0xFF;
+    data[1] = (data[1] & 0xF0) | ((value >> 8) & 0xF);
+  }
+}
+
+//FAT16
+static const char * FAT16_FILE_SYSTEM_TYPE = "FAT16";
+
+static uint16_t fat16_sectors_per_alloc_table(uint32_t sector_num){
+  uint32_t required_bytes = sector_num * 2;
+  return (required_bytes / DISK_SECTOR_SIZE) + ((required_bytes & (DISK_SECTOR_SIZE - 1))?1:0);
+}
+
+static uint8_t * fat16_add_table(uint8_t * dst, fat_boot_sector_t * boot){
+  memset(dst+DISK_SECTOR_SIZE, 0, boot->sectors_per_alloc_table * DISK_SECTOR_SIZE);
+  uint16_t * d = (uint16_t *)(dst + DISK_SECTOR_SIZE);
+  d[0] = 0xFFF8;
+  d[1] = 0xFFFF;
+  return (uint8_t *)d;
+}
+
+static void fat16_set_table_index(uint8_t * table, uint16_t index, uint16_t value){
+  uint16_t offset = index * 2;
+  *(uint16_t *)(table + offset) = value;
+}
+
+//Interface
+const char * fat_file_system_type(bool fat16) {
+	return ((fat16)?FAT16_FILE_SYSTEM_TYPE:FAT12_FILE_SYSTEM_TYPE);
+}
+
+uint16_t fat_sectors_per_alloc_table(uint32_t sector_num, bool fat16){
+  if(fat16){
+    return fat16_sectors_per_alloc_table(sector_num);
+  }
+  return fat12_sectors_per_alloc_table(sector_num);
+}
+
+uint8_t * fat_add_table(uint8_t * dst, fat_boot_sector_t * boot, bool fat16){
+  if(fat16){
+    return fat16_add_table(dst, boot);
+  }
+  return fat12_add_table(dst, boot);
+}
+
+void fat_set_table_index(uint8_t * table, uint16_t index, uint16_t value, bool fat16){
+  if(fat16){
+    fat16_set_table_index(table, index, value);
+  } else {
+    fat12_set_table_index(table, index, value);
+  }
+}
+
+fat_boot_sector_t * fat_add_boot_sector(uint8_t * dst, uint16_t sector_num, uint16_t table_sectors, const char * file_system_type, const char * volume_label, uint32_t serial_number){
+  fat_boot_sector_t *boot = (fat_boot_sector_t*)dst;
+  boot->jump_instruction[0] = 0xEB;
+  boot->jump_instruction[1] = 0x3C;
+  boot->jump_instruction[2] = 0x90;
+  cplstr(boot->oem_name, "MSDOS5.0", 8);
+  boot->bytes_per_sector = DISK_SECTOR_SIZE;
+  boot->sectors_per_cluster = 1;
+  boot->reserved_sectors_count = 1;
+  boot->file_alloc_tables_num = 1;
+  boot->max_root_dir_entries = 16;
+  boot->fat12_sector_num = sector_num;
+  boot->media_descriptor = 0xF8;
+  boot->sectors_per_alloc_table = table_sectors;
+  boot->sectors_per_track = 1;
+  boot->num_heads = 1;
+  boot->hidden_sectors_count = 0;
+  boot->total_sectors_32 = 0;
+  boot->physical_drive_number = 0x80;
+  boot->reserved0 = 0x00;
+  boot->extended_boot_signature = 0x29;
+  boot->serial_number = serial_number;
+  cplstrsp(boot->volume_label, volume_label, 11);
+  memset(boot->reserved, 0, 448);
+  cplstrsp(boot->file_system_type, file_system_type, 8);
+  boot->signature = 0xAA55;
+  return boot;
+}
+
+fat_dir_entry_t * fat_add_label(uint8_t * dst, const char * volume_label){
+  fat_boot_sector_t * boot = (fat_boot_sector_t *)dst;
+  fat_dir_entry_t * entry = (fat_dir_entry_t *)(dst + ((boot->sectors_per_alloc_table+1) * DISK_SECTOR_SIZE));
+  memset(entry, 0, sizeof(fat_dir_entry_t));
+  cplstrsp(entry->volume_label, volume_label, 11);
+  entry->file_attr = FAT_FILE_ATTR_VOLUME_LABEL;
+  return entry;
+}
+
+fat_dir_entry_t * fat_add_root_file(uint8_t * dst, uint8_t index, const char * file_name, const char * file_extension, size_t file_size, uint16_t data_start_sector, bool is_fat16){
+  fat_boot_sector_t * boot = (fat_boot_sector_t *)dst;
+  uint8_t * table = dst + DISK_SECTOR_SIZE;
+  fat_dir_entry_t * entry = (fat_dir_entry_t *)(dst + ((boot->sectors_per_alloc_table+1) * DISK_SECTOR_SIZE) + (index * sizeof(fat_dir_entry_t)));
+  memset(entry, 0, sizeof(fat_dir_entry_t));
+  cplstrsp(entry->file_name, file_name, 8);
+  cplstrsp(entry->file_extension, file_extension, 3);
+  entry->file_attr = FAT_FILE_ATTR_ARCHIVE;
+  entry->file_size = file_size;
+  entry->data_start_sector = data_start_sector;
+  entry->extended_attr = 0;
+
+  uint16_t file_sectors = file_size / DISK_SECTOR_SIZE;
+  if(file_size % DISK_SECTOR_SIZE){
+    file_sectors++;
+  }
+
+  uint16_t data_end_sector = data_start_sector + file_sectors;
+  for(uint16_t i=data_start_sector; i<(data_end_sector-1); i++){
+    fat_set_table_index(table, i, i+1, is_fat16);
+  }
+  fat_set_table_index(table, data_end_sector-1, 0xFFFF, is_fat16);
+
+  //Set Firmware Date based on the build time
+  static const char * month_names_short[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+  char mstr[8] = {'\0',};
+  const char *str = __DATE__ " " __TIME__;
+  int ms=0, seconds=0, minutes=0, hours=0, year=0, date=0, month=0;
+  int r = sscanf(str,"%s %d %d %d:%d:%d", mstr, &date, &year, &hours, &minutes, &seconds);
+  if(r >= 0){
+    for(int i=0; i<12; i++){
+      if(!strcmp(mstr, month_names_short[i])){
+        month = i;
+        break;
+      }
+    }
+    entry->creation_time_ms = FAT_MS2V(seconds, ms);
+    entry->creation_time_hms = FAT_HMS2V(hours, minutes, seconds);
+    entry->creation_time_ymd = FAT_YMD2V(year, month, date);
+    entry->last_access_ymd = entry->creation_time_ymd;
+    entry->last_modified_hms = entry->creation_time_hms;
+    entry->last_modified_ymd = entry->creation_time_ymd;
+  }
+  return entry;
+}
+
+uint8_t fat_lfn_checksum(const uint8_t *short_filename){
+   uint8_t sum = 0;
+   for (uint8_t i = 11; i; i--) {
+      sum = ((sum & 1) << 7) + (sum >> 1) + *short_filename++;
+   }
+   return sum;
+}

cores/esp32/firmware_msc_fat.h

@@ -0,0 +1,141 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#define FAT_U8(v) ((v) & 0xFF)
+#define FAT_U16(v) FAT_U8(v), FAT_U8((v) >> 8)
+#define FAT_U32(v) FAT_U8(v), FAT_U8((v) >> 8), FAT_U8((v) >> 16), FAT_U8((v) >> 24)
+
+#define FAT12_TBL2B(l,h)    FAT_U8(l), FAT_U8(((l >> 8) & 0xF) | ((h << 4) & 0xF0)), FAT_U8(h >> 4)
+
+#define FAT_MS2B(s,ms)    FAT_U8(((((s) & 0x1) * 1000) + (ms)) / 10)
+#define FAT_HMS2B(h,m,s)  FAT_U8(((s) >> 1)|(((m) & 0x7) << 5)),      FAT_U8((((m) >> 3) & 0x7)|((h) << 3))
+#define FAT_YMD2B(y,m,d)  FAT_U8(((d) & 0x1F)|(((m) & 0x7) << 5)),    FAT_U8((((m) >> 3) & 0x1)|((((y) - 1980) & 0x7F) << 1))
+
+#define FAT_MS2V(s,ms)    FAT_U8(((((s) & 0x1) * 1000) + (ms)) / 10)
+#define FAT_HMS2V(h,m,s)  (FAT_U8(((s) >> 1)|(((m) & 0x7) << 5)) | (FAT_U8((((m) >> 3) & 0x7)|((h) << 3)) << 8))
+#define FAT_YMD2V(y,m,d)  (FAT_U8(((d) & 0x1F)|(((m) & 0x7) << 5)) | (FAT_U8((((m) >> 3) & 0x1)|((((y) - 1980) & 0x7F) << 1)) << 8))
+
+#define FAT_B2HMS(hms)    ((hms >> 11) & 0x1F), ((hms >> 5) & 0x3F), ((hms & 0x1F) << 1)
+#define FAT_B2YMD(ymd)    (((ymd >> 9) & 0x7F) + 1980), ((ymd >> 5) & 0x0F), (ymd & 0x1F)
+
+#define FAT_FILE_ATTR_READ_ONLY     0x01
+#define FAT_FILE_ATTR_HIDDEN        0x02
+#define FAT_FILE_ATTR_SYSTEM        0x04
+#define FAT_FILE_ATTR_VOLUME_LABEL  0x08
+#define FAT_FILE_ATTR_SUBDIRECTORY  0x10
+#define FAT_FILE_ATTR_ARCHIVE       0x20
+#define FAT_FILE_ATTR_DEVICE        0x40
+
+static const uint16_t DISK_SECTOR_SIZE = 512;
+
+#define FAT_SIZE_TO_SECTORS(bytes) ((bytes) / DISK_SECTOR_SIZE) + (((bytes) % DISK_SECTOR_SIZE)?1:0)
+
+typedef struct __attribute__ ((packed)) {
+  uint8_t jump_instruction[3];
+  char oem_name[8];//padded with spaces (0x20)
+  uint16_t bytes_per_sector;//DISK_SECTOR_SIZE usually 512
+  uint8_t sectors_per_cluster;//Allowed values are 1, 2, 4, 8, 16, 32, 64, and 128
+  uint16_t reserved_sectors_count;//At least 1 for this sector, usually 32 for FAT32
+  uint8_t file_alloc_tables_num;//Almost always 2; RAM disks might use 1
+  uint16_t max_root_dir_entries;//FAT12 and FAT16
+  uint16_t fat12_sector_num;//DISK_SECTOR_NUM FAT12 and FAT16
+  uint8_t media_descriptor;
+  uint16_t sectors_per_alloc_table;//FAT12 and FAT16
+  uint16_t sectors_per_track;//A value of 0 may indicate LBA-only access
+  uint16_t num_heads;
+  uint32_t hidden_sectors_count;
+  uint32_t total_sectors_32;
+  uint8_t physical_drive_number;//0x00 for (first) removable media, 0x80 for (first) fixed disk
+  uint8_t reserved0;
+  uint8_t extended_boot_signature;//should be 0x29
+  uint32_t serial_number;//0x1234 => 1234
+  char volume_label[11];//padded with spaces (0x20)
+  char file_system_type[8];//padded with spaces (0x20)
+  uint8_t reserved[448];
+  uint16_t signature;//should be 0xAA55
+} fat_boot_sector_t;
+
+typedef struct __attribute__ ((packed)) {
+  union {
+    struct {
+      char file_name[8];//padded with spaces (0x20)
+      char file_extension[3];//padded with spaces (0x20)
+    };
+    struct {
+      uint8_t file_magic;// 0xE5:deleted, 0x05:will_be_deleted, 0x00:end_marker, 0x2E:dot_marker(. or ..)
+      char file_magic_data[10];
+    };
+    char volume_label[11];//padded with spaces (0x20)
+  };
+  uint8_t file_attr;//mask of FAT_FILE_ATTR_*
+  uint8_t reserved;//always 0
+  uint8_t creation_time_ms;//ms * 10; max 1990 (1s 990ms)
+  uint16_t creation_time_hms; // [5:6:5] => h:m:(s/2)
+  uint16_t creation_time_ymd; // [7:4:5] => (y+1980):m:d
+  uint16_t last_access_ymd;
+  uint16_t extended_attr;
+  uint16_t last_modified_hms;
+  uint16_t last_modified_ymd;
+  uint16_t data_start_sector;
+  uint32_t file_size;
+} fat_dir_entry_t;
+
+typedef struct __attribute__ ((packed)) {
+  union {
+    struct {
+      uint8_t number:5;
+      uint8_t reserved0:1;
+      uint8_t llfp:1;
+      uint8_t reserved1:1;
+    } seq;
+    uint8_t seq_num; //0xE5: Deleted Entry
+  };
+  uint16_t name0[5];
+  uint8_t attr; //ALWAYS 0x0F
+  uint8_t type; //ALWAYS 0x00
+  uint8_t dos_checksum;
+  uint16_t name1[6];
+  uint16_t first_cluster; //ALWAYS 0x0000
+  uint16_t name2[2];
+} fat_lfn_entry_t;
+
+typedef union {
+  fat_dir_entry_t dir;
+  fat_lfn_entry_t lfn;
+} fat_entry_t;
+
+const char * fat_file_system_type(bool fat16);
+uint16_t fat_sectors_per_alloc_table(uint32_t sector_num, bool fat16);
+uint8_t * fat_add_table(uint8_t * dst, fat_boot_sector_t * boot, bool fat16);
+void fat_set_table_index(uint8_t * table, uint16_t index, uint16_t value, bool fat16);
+fat_boot_sector_t * fat_add_boot_sector(uint8_t * dst, uint16_t sector_num, uint16_t table_sectors, const char * file_system_type, const char * volume_label, uint32_t serial_number);
+fat_dir_entry_t * fat_add_label(uint8_t * dst, const char * volume_label);
+fat_dir_entry_t * fat_add_root_file(uint8_t * dst, uint8_t index, const char * file_name, const char * file_extension, size_t file_size, uint16_t data_start_sector, bool is_fat16);
+uint8_t fat_lfn_checksum(const uint8_t *short_filename);
+
+#ifdef __cplusplus
+ }
+#endif

cores/esp32/libb64/AUTHORS

@@ -0,0 +1,7 @@
+libb64: Base64 Encoding/Decoding Routines
+======================================
+
+Authors:
+-------
+
+Chris Venter	chris.venter@gmail.com	http://rocketpod.blogspot.com

cores/esp32/libb64/LICENSE

@@ -0,0 +1,29 @@
+Copyright-Only Dedication (based on United States law) 
+or Public Domain Certification
+
+The person or persons who have associated work with this document (the
+"Dedicator" or "Certifier") hereby either (a) certifies that, to the best of
+his knowledge, the work of authorship identified is in the public domain of the
+country from which the work is published, or (b) hereby dedicates whatever
+copyright the dedicators holds in the work of authorship identified below (the
+"Work") to the public domain. A certifier, moreover, dedicates any copyright
+interest he may have in the associated work, and for these purposes, is
+described as a "dedicator" below.
+
+A certifier has taken reasonable steps to verify the copyright status of this
+work. Certifier recognizes that his good faith efforts may not shield him from
+liability if in fact the work certified is not in the public domain.
+
+Dedicator makes this dedication for the benefit of the public at large and to
+the detriment of the Dedicator's heirs and successors. Dedicator intends this
+dedication to be an overt act of relinquishment in perpetuity of all present
+and future rights under copyright law, whether vested or contingent, in the
+Work. Dedicator understands that such relinquishment of all rights includes
+the relinquishment of all rights to enforce (by lawsuit or otherwise) those
+copyrights in the Work.
+
+Dedicator recognizes that, once placed in the public domain, the Work may be
+freely reproduced, distributed, transmitted, used, modified, built upon, or
+otherwise exploited by anyone for any purpose, commercial or non-commercial,
+and in any way, including by methods that have not yet been invented or
+conceived.