Adding LITTLEFS after esp_littlefs (IDF) is built-in (#4483)

Tools idea: https://github.com/lorol/arduino-esp32fs-plugin

.github/ISSUE_TEMPLATE/bug_report.md

@@ -24,7 +24,7 @@ https://github.com/me-no-dev/EspExceptionDecoder
 
 ### Hardware:
 Board:							?ESP32 Dev Module? ?node32? ?ttgo_lora?
-Core Installation version:			?1.0.0? ?1.0.1-rc4? ?1.0.1? ?1.0.1-git?
+Core Installation version:			?1.0.0? ?1.0.1-rc4? ?1.0.1? ?1.0.1-git? ?1.0.2? ?1.0.3?
 IDE name:						?Arduino IDE? ?Platform.io? ?IDF component?
 Flash Frequency:					?40Mhz?
 PSRAM enabled:                                    ?no? ?yes?

.github/scripts/check-cmakelists.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# This script is for Travis. It checks all non-examples source files in libraries/ and cores/ are listed in
+# CMakeLists.txt for the cmake-based IDF component
+#
+# If you see an error running this script, edit CMakeLists.txt and add any new source files into your PR
+#
+
+set -e
+
+# pull all submodules
+git submodule update --init --recursive
+
+# find all source files in repo
+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`
+
+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"
+    echo "Edit CMakeLists.txt as appropriate to add/remove source files from COMPONENT_SRCS"
+    exit 1
+fi
+
+echo "CMakeLists.txt and repo source files match"
+exit 0

.github/scripts/install-arduino-core-esp32.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+export ARDUINO_ESP32_PATH="$ARDUINO_USR_PATH/hardware/espressif/esp32"
+if [ ! -d "$ARDUINO_ESP32_PATH" ]; then
+	echo "Installing ESP32 Arduino Core ..."
+	script_init_path="$PWD"
+	mkdir -p "$ARDUINO_USR_PATH/hardware/espressif"
+	cd "$ARDUINO_USR_PATH/hardware/espressif"
+
+	echo "Installing Python Serial ..."
+	pip install pyserial > /dev/null
+
+	if [ "$OS_IS_WINDOWS" == "1" ]; then
+		echo "Installing Python Requests ..."
+		pip install requests > /dev/null
+	fi
+
+	if [ "$GITHUB_REPOSITORY" == "espressif/arduino-esp32" ];  then
+		echo "Linking Core..."
+		ln -s $GITHUB_WORKSPACE esp32
+	else
+		echo "Cloning Core Repository..."
+		git clone https://github.com/espressif/arduino-esp32.git esp32 > /dev/null 2>&1
+	fi
+
+	#echo "Updating Submodules ..."
+	cd esp32
+	#git submodule update --init --recursive > /dev/null 2>&1
+
+	echo "Installing Platform Tools ..."
+	cd tools && python get.py
+	cd $script_init_path
+
+	echo "ESP32 Arduino has been installed in '$ARDUINO_ESP32_PATH'"
+	echo ""
+fi

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

@@ -0,0 +1,228 @@
+#!/bin/bash
+
+#OSTYPE: 'linux-gnu', ARCH: 'x86_64' => linux64
+#OSTYPE: 'msys', ARCH: 'x86_64' => win32
+#OSTYPE: 'darwin18', ARCH: 'i386' => macos
+
+OSBITS=`arch`
+if [[ "$OSTYPE" == "linux"* ]]; then
+	export OS_IS_LINUX="1"
+	ARCHIVE_FORMAT="tar.xz"
+	if [[ "$OSBITS" == "i686" ]]; then
+		OS_NAME="linux32"
+	elif [[ "$OSBITS" == "x86_64" ]]; then
+		OS_NAME="linux64"
+	elif [[ "$OSBITS" == "armv7l" || "$OSBITS" == "aarch64" ]]; then
+		OS_NAME="linuxarm"
+	else
+		OS_NAME="$OSTYPE-$OSBITS"
+		echo "Unknown OS '$OS_NAME'"
+		exit 1
+	fi
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+	export OS_IS_MACOS="1"
+	ARCHIVE_FORMAT="zip"
+	OS_NAME="macosx"
+elif [[ "$OSTYPE" == "cygwin" ]] || [[ "$OSTYPE" == "msys" ]] || [[ "$OSTYPE" == "win32" ]]; then
+	export OS_IS_WINDOWS="1"
+	ARCHIVE_FORMAT="zip"
+	OS_NAME="windows"
+else
+	OS_NAME="$OSTYPE-$OSBITS"
+	echo "Unknown OS '$OS_NAME'"
+	exit 1
+fi
+export OS_NAME
+
+ARDUINO_BUILD_DIR="$HOME/.arduino/build.tmp"
+ARDUINO_CACHE_DIR="$HOME/.arduino/cache.tmp"
+
+if [ "$OS_IS_MACOS" == "1" ]; then
+	export ARDUINO_IDE_PATH="/Applications/Arduino.app/Contents/Java"
+	export ARDUINO_USR_PATH="$HOME/Documents/Arduino"
+elif [ "$OS_IS_WINDOWS" == "1" ]; then
+	export ARDUINO_IDE_PATH="$HOME/arduino_ide"
+	export ARDUINO_USR_PATH="$HOME/Documents/Arduino"
+else
+	export ARDUINO_IDE_PATH="$HOME/arduino_ide"
+	export ARDUINO_USR_PATH="$HOME/Arduino"
+fi
+
+# Updated as of Nov 3rd 2020
+ARDUINO_IDE_URL="https://github.com/espressif/arduino-esp32/releases/download/1.0.4/arduino-nightly-"
+
+# Currently not working
+#ARDUINO_IDE_URL="https://www.arduino.cc/download.php?f=/arduino-nightly-"
+
+if [ ! -d "$ARDUINO_IDE_PATH" ]; then
+	echo "Installing Arduino IDE on $OS_NAME ..."
+	echo "Downloading '$ARDUINO_IDE_URL$OS_NAME.$ARCHIVE_FORMAT' to 'arduino.$ARCHIVE_FORMAT' ..."
+	if [ "$OS_IS_LINUX" == "1" ]; then
+		wget -O "arduino.$ARCHIVE_FORMAT" "$ARDUINO_IDE_URL$OS_NAME.$ARCHIVE_FORMAT" > /dev/null 2>&1
+		echo "Extracting 'arduino.$ARCHIVE_FORMAT' ..."
+		tar xf "arduino.$ARCHIVE_FORMAT" > /dev/null
+		mv arduino-nightly "$ARDUINO_IDE_PATH"
+	else
+		curl -o "arduino.$ARCHIVE_FORMAT" -L "$ARDUINO_IDE_URL$OS_NAME.$ARCHIVE_FORMAT" > /dev/null 2>&1
+		echo "Extracting 'arduino.$ARCHIVE_FORMAT' ..."
+		unzip "arduino.$ARCHIVE_FORMAT" > /dev/null
+		if [ "$OS_IS_MACOS" == "1" ]; then
+			mv "Arduino.app" "/Applications/Arduino.app"
+		else
+			mv arduino-nightly "$ARDUINO_IDE_PATH"
+		fi
+	fi
+	rm -rf "arduino.$ARCHIVE_FORMAT"
+
+	mkdir -p "$ARDUINO_USR_PATH/libraries"
+	mkdir -p "$ARDUINO_USR_PATH/hardware"
+
+	echo "Arduino IDE Installed in '$ARDUINO_IDE_PATH'"
+	echo ""
+fi
+
+function build_sketch(){ # build_sketch <fqbn> <path-to-ino> [extra-options]
+    if [ "$#" -lt 2 ]; then
+		echo "ERROR: Illegal number of parameters"
+		echo "USAGE: build_sketch <fqbn> <path-to-ino> [extra-options]"
+		return 1
+	fi
+
+	local fqbn="$1"
+	local sketch="$2"
+	local xtra_opts="$3"
+	local win_opts=""
+	if [ "$OS_IS_WINDOWS" == "1" ]; then
+		local ctags_version=`ls "$ARDUINO_IDE_PATH/tools-builder/ctags/"`
+		local preprocessor_version=`ls "$ARDUINO_IDE_PATH/tools-builder/arduino-preprocessor/"`
+		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")"' ..."
+	mkdir -p "$ARDUINO_BUILD_DIR"
+	mkdir -p "$ARDUINO_CACHE_DIR"
+	$ARDUINO_IDE_PATH/arduino-builder -compile -logger=human -core-api-version=10810 \
+		-fqbn=$fqbn \
+		-warnings="all" \
+		-tools "$ARDUINO_IDE_PATH/tools-builder" \
+		-tools "$ARDUINO_IDE_PATH/tools" \
+		-built-in-libraries "$ARDUINO_IDE_PATH/libraries" \
+		-hardware "$ARDUINO_IDE_PATH/hardware" \
+		-hardware "$ARDUINO_USR_PATH/hardware" \
+		-libraries "$ARDUINO_USR_PATH/libraries" \
+		-build-cache "$ARDUINO_CACHE_DIR" \
+		-build-path "$ARDUINO_BUILD_DIR" \
+		$win_opts $xtra_opts "$sketch"
+}
+
+function count_sketches() # count_sketches <examples-path> <target-mcu>
+{
+	local examples="$1"
+	local target="$2"
+    rm -rf sketches.txt
+	if [ ! -d "$examples" ]; then
+		touch sketches.txt
+		return 0
+	fi
+    local sketches=$(find $examples -name *.ino)
+    local sketchnum=0
+    for sketch in $sketches; do
+        local sketchdir=$(dirname $sketch)
+        local sketchdirname=$(basename $sketchdir)
+        local sketchname=$(basename $sketch)
+        if [[ "${sketchdirname}.ino" != "$sketchname" ]]; then
+            continue
+        fi;
+        if [[ -f "$sketchdir/.skip.$target" ]]; then
+            continue
+        fi
+        echo $sketch >> sketches.txt
+        sketchnum=$(($sketchnum + 1))
+    done
+    return $sketchnum
+}
+
+function build_sketches() # build_sketches <fqbn> <target-mcu> <examples-path> <chunk> <total-chunks> [extra-options]
+{
+    local fqbn=$1
+	local target="$2"
+    local examples=$3
+    local chunk_idex=$4
+    local chunks_num=$5
+    local xtra_opts=$6
+
+    if [ "$#" -lt 3 ]; then
+		echo "ERROR: Illegal number of parameters"
+		echo "USAGE: build_sketches <fqbn> <target-mcu <examples-path> [<chunk> <total-chunks>] [extra-options]"
+		return 1
+	fi
+
+    if [ "$#" -lt 5 ]; then
+		chunk_idex="0"
+		chunks_num="1"
+		xtra_opts=$4
+	fi
+
+	if [ "$chunks_num" -le 0 ]; then
+		echo "ERROR: Chunks count must be positive number"
+		return 1
+	fi
+	if [ "$chunk_idex" -ge "$chunks_num" ]; then
+		echo "ERROR: Chunk index must be less than chunks count"
+		return 1
+	fi
+
+	set +e
+    count_sketches "$examples"
+    local sketchcount=$?
+	set -e
+    local sketches=$(cat sketches.txt)
+    rm -rf sketches.txt
+
+    local chunk_size=$(( $sketchcount / $chunks_num ))
+    local all_chunks=$(( $chunks_num * $chunk_size ))
+    if [ "$all_chunks" -lt "$sketchcount" ]; then
+    	chunk_size=$(( $chunk_size + 1 ))
+    fi
+
+    local start_index=$(( $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 "$sketchcount" ]; then
+    	end_index=$sketchcount
+    fi
+
+    local start_num=$(( $start_index + 1 ))
+    echo "Found $sketchcount Sketches";
+    echo "Chunk Count : $chunks_num"
+    echo "Chunk Size  : $chunk_size"
+    echo "Start Sketch: $start_num"
+    echo "End Sketch  : $end_index"
+
+    local sketchnum=0
+    for sketch in $sketches; do
+        local sketchdir=$(dirname $sketch)
+        local sketchdirname=$(basename $sketchdir)
+        local sketchname=$(basename $sketch)
+        if [ "${sketchdirname}.ino" != "$sketchname" ] \
+        || [ -f "$sketchdir/.skip.$target" ]; then
+            continue
+        fi
+        sketchnum=$(($sketchnum + 1))
+        if [ "$sketchnum" -le "$start_index" ] \
+        || [ "$sketchnum" -gt "$end_index" ]; then
+        	continue
+        fi
+        build_sketch "$fqbn" "$sketch" "$xtra_opts"
+        local result=$?
+        if [ $result -ne 0 ]; then
+            return $result
+        fi
+    done
+    return 0
+}

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

@@ -0,0 +1,151 @@
+#!/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"
+
+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
+
+echo "Installing Platform ESP32 ..."
+python -m platformio platform install $PLATFORMIO_ESP32_URL > /dev/null 2>&1
+
+echo "Replacing the framework version ..."
+python -c "import json; import os; fp=open(os.path.expanduser('~/.platformio/platforms/espressif32/platform.json'), 'r+'); data=json.load(fp); data['packages']['framework-arduinoespressif32']['version'] = '*'; del data['packages']['framework-arduinoespressif32']['owner']; fp.seek(0); fp.truncate(); json.dump(data, fp); fp.close()"
+
+if [ "$GITHUB_REPOSITORY" == "espressif/arduino-esp32" ];  then
+	echo "Linking Core..."
+	ln -s $GITHUB_WORKSPACE "$PLATFORMIO_ESP32_PATH"
+else
+	echo "Cloning Core Repository ..."
+	git clone --recursive https://github.com/espressif/arduino-esp32.git "$PLATFORMIO_ESP32_PATH" > /dev/null 2>&1
+fi
+
+echo "PlatformIO for ESP32 has been installed"
+echo ""
+
+function build_pio_sketch(){ # build_pio_sketch <board> <options> <path-to-ino>
+    if [ "$#" -lt 3 ]; then
+        echo "ERROR: Illegal number of parameters"
+        echo "USAGE: build_pio_sketch <board> <options> <path-to-ino>"
+        return 1
+    fi
+
+    local board="$1"
+    local options="$2"
+    local sketch="$3"
+    local sketch_dir=$(dirname "$sketch")
+    echo ""
+    echo "Compiling '"$(basename "$sketch")"' ..."
+    python -m platformio ci --board "$board" "$sketch_dir" --project-option="$options"
+}
+
+function count_sketches() # count_sketches <examples-path>
+{
+    local examples="$1"
+    rm -rf sketches.txt
+    if [ ! -d "$examples" ]; then
+        touch sketches.txt
+        return 0
+    fi
+    local sketches=$(find $examples -name *.ino)
+    local sketchnum=0
+    for sketch in $sketches; do
+        local sketchdir=$(dirname $sketch)
+        local sketchdirname=$(basename $sketchdir)
+        local sketchname=$(basename $sketch)
+        if [[ "${sketchdirname}.ino" != "$sketchname" ]]; then
+            continue
+        fi;
+        if [[ -f "$sketchdir/.test.skip" ]]; then
+            continue
+        fi
+        echo $sketch >> sketches.txt
+        sketchnum=$(($sketchnum + 1))
+    done
+    return $sketchnum
+}
+
+function build_pio_sketches() # build_pio_sketches <board> <options> <examples-path> <chunk> <total-chunks>
+{
+    if [ "$#" -lt 3 ]; then
+        echo "ERROR: Illegal number of parameters"
+        echo "USAGE: build_pio_sketches <board> <options> <examples-path> [<chunk> <total-chunks>]"
+        return 1
+    fi
+
+    local board=$1
+    local options="$2"
+    local examples=$3
+    local chunk_idex=$4
+    local chunks_num=$5
+
+    if [ "$#" -lt 5 ]; then
+        chunk_idex="0"
+        chunks_num="1"
+    fi
+
+    if [ "$chunks_num" -le 0 ]; then
+        echo "ERROR: Chunks count must be positive number"
+        return 1
+    fi
+    if [ "$chunk_idex" -ge "$chunks_num" ]; then
+        echo "ERROR: Chunk index must be less than chunks count"
+        return 1
+    fi
+
+    set +e
+    count_sketches "$examples"
+    local sketchcount=$?
+    set -e
+    local sketches=$(cat sketches.txt)
+    rm -rf sketches.txt
+
+    local chunk_size=$(( $sketchcount / $chunks_num ))
+    local all_chunks=$(( $chunks_num * $chunk_size ))
+    if [ "$all_chunks" -lt "$sketchcount" ]; then
+        chunk_size=$(( $chunk_size + 1 ))
+    fi
+
+    local start_index=$(( $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 "$sketchcount" ]; then
+        end_index=$sketchcount
+    fi
+
+    local start_num=$(( $start_index + 1 ))
+    echo "Found $sketchcount Sketches";
+    echo "Chunk Count : $chunks_num"
+    echo "Chunk Size  : $chunk_size"
+    echo "Start Sketch: $start_num"
+    echo "End Sketch  : $end_index"
+
+    local sketchnum=0
+    for sketch in $sketches; do
+        local sketchdir=$(dirname $sketch)
+        local sketchdirname=$(basename $sketchdir)
+        local sketchname=$(basename $sketch)
+        if [ "${sketchdirname}.ino" != "$sketchname" ] \
+        || [ -f "$sketchdir/.test.skip" ]; then
+            continue
+        fi
+        sketchnum=$(($sketchnum + 1))
+        if [ "$sketchnum" -le "$start_index" ] \
+        || [ "$sketchnum" -gt "$end_index" ]; then
+            continue
+        fi
+        build_pio_sketch "$board" "$options" "$sketch"
+        local result=$?
+        if [ $result -ne 0 ]; then
+            return $result
+        fi
+    done
+    return 0
+}

.github/scripts/merge_packages.py

@@ -36,7 +36,11 @@ def pkgVersionNormalized(versionString):
     verParts = re.split('\.|-rc', verStr, flags=re.IGNORECASE)
     
     if len(verParts) == 3:
-        verStr = str(versionString) + '-rc' + str(sys.maxint)
+        if (sys.version_info > (3, 0)): # Python 3
+            verStr = str(versionString) + '-rc' + str(sys.maxsize)
+        else: # Python 2
+            verStr = str(versionString) + '-rc' + str(sys.maxint)
+        
     elif len(verParts) != 4:
         print("pkgVersionNormalized WARNING: unexpected version format: {0})".format(verStr), file=sys.stderr)
         

.github/scripts/on-pages.sh

@@ -0,0 +1,131 @@
+#/bin/bash
+set -e
+
+function get_file_size(){
+    local file="$1"
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        eval `stat -s "$file"`
+        local res="$?"
+        echo "$st_size"
+        return $res
+    else
+        stat --printf="%s" "$file"
+        return $?
+    fi
+}
+
+#git_remove_from_pages <file>
+function git_remove_from_pages(){
+    local path=$1
+    local info=`curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.object+json" -X GET "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path?ref=gh-pages"`
+    local type=`echo "$info" | jq -r '.type'`
+    if [ ! $type == "file" ]; then
+        if [ ! $type == "null" ]; then
+            echo "Wrong type '$type'"
+        else
+            echo "File is not on Pages"
+        fi
+        return 0
+    fi
+    local sha=`echo "$info" | jq -r '.sha'`
+    local message="Deleting "$(basename $path)
+    local json="{\"branch\":\"gh-pages\",\"message\":\"$message\",\"sha\":\"$sha\"}"
+    echo "$json" | curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.raw+json" -X DELETE --data @- "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path"
+}
+
+function git_upload_to_pages(){
+    local path=$1
+    local src=$2
+
+    if [ ! -f "$src" ]; then
+        >&2 echo "Input is not a file! Aborting..."
+        return 1
+    fi
+
+    local info=`curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.object+json" -X GET "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path?ref=gh-pages"`
+    local type=`echo "$info" | jq -r '.type'`
+    local message=$(basename $path)
+    local sha=""
+    local content=""
+
+    if [ $type == "file" ]; then
+        sha=`echo "$info" | jq -r '.sha'`
+        sha=",\"sha\":\"$sha\""
+        message="Updating $message"
+    elif [ ! $type == "null" ]; then
+        >&2 echo "Wrong type '$type'"
+        return 1
+    else
+        message="Creating $message"
+    fi
+
+    content=`base64 -i "$src"`
+    data="{\"branch\":\"gh-pages\",\"message\":\"$message\",\"content\":\"$content\"$sha}"
+
+    echo "$data" | curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.raw+json" -X PUT --data @- "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path"
+}
+
+function git_safe_upload_to_pages(){
+    local path=$1
+    local file="$2"
+    local name=$(basename "$file")
+    local size=`get_file_size "$file"`
+    local upload_res=`git_upload_to_pages "$path" "$file"`
+    if [ $? -ne 0 ]; then 
+        >&2 echo "ERROR: Failed to upload '$name' ($?)"
+        return 1
+    fi
+    up_size=`echo "$upload_res" | jq -r '.content.size'`
+    if [ $up_size -ne $size ]; then
+        >&2 echo "ERROR: Uploaded size does not match! $up_size != $size"
+        #git_delete_asset
+        return 1
+    fi
+    echo "$upload_res" | jq -r '.content.download_url'
+    return $?
+}
+
+EVENT_JSON=`cat $GITHUB_EVENT_PATH`
+
+pages_added=`echo "$EVENT_JSON" | jq -r '.commits[].added[]'`
+pages_modified=`echo "$EVENT_JSON" | jq -r '.commits[].modified[]'`
+pages_removed=`echo "$EVENT_JSON" | jq -r '.commits[].removed[]'`
+
+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

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+set -e
+
+if [ ! -z "$TRAVIS_TAG" ]; then
+	echo "Skipping Test: Tagged build"
+	exit 0
+fi
+
+if [ ! -z "$GITHUB_WORKSPACE" ]; then
+	export TRAVIS_BUILD_DIR="$GITHUB_WORKSPACE"
+	export TRAVIS_REPO_SLUG="$GITHUB_REPOSITORY"
+elif [ ! -z "$TRAVIS_BUILD_DIR" ]; then
+	export GITHUB_WORKSPACE="$TRAVIS_BUILD_DIR"
+	export GITHUB_REPOSITORY="$TRAVIS_REPO_SLUG"
+else
+	export GITHUB_WORKSPACE="$PWD"
+	export GITHUB_REPOSITORY="espressif/arduino-esp32"
+fi
+
+CHUNK_INDEX=$1
+CHUNKS_CNT=$2
+BUILD_PIO=0
+if [ "$#" -lt 2 ] || [ "$CHUNKS_CNT" -le 0 ]; then
+	CHUNK_INDEX=0
+	CHUNKS_CNT=1
+elif [ "$CHUNK_INDEX" -gt "$CHUNKS_CNT" ]; then
+	CHUNK_INDEX=$CHUNKS_CNT
+elif [ "$CHUNK_INDEX" -eq "$CHUNKS_CNT" ]; then
+	BUILD_PIO=1
+fi
+
+#echo "Updating submodules ..."
+#git -C "$GITHUB_WORKSPACE" submodule update --init --recursive > /dev/null 2>&1
+
+if [ "$BUILD_PIO" -eq 0 ]; then
+	# ArduinoIDE ESP32 Test
+    TARGET="esp32"
+	FQBN="espressif:esp32:esp32:PSRAM=enabled,PartitionScheme=huge_app"
+	source ./.github/scripts/install-arduino-ide.sh
+	source ./.github/scripts/install-arduino-core-esp32.sh
+	if [ "$OS_IS_WINDOWS" == "1" ]; then
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/BLE/examples/BLE_server/BLE_server.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino"
+	elif [ "$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" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/BluetoothSerial/examples/SerialToSerialBT/SerialToSerialBT.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/BLE/examples/BLE_server/BLE_server.ino" && \
+		build_sketch "$FQBN" "$ARDUINO_ESP32_PATH/libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino"
+	else
+		# CMake Test
+		if [ "$CHUNK_INDEX" -eq 0 ]; then
+			bash "$ARDUINO_ESP32_PATH/.github/scripts/check-cmakelists.sh"
+		fi
+		build_sketches "$FQBN" "$TARGET" "$ARDUINO_ESP32_PATH/libraries" "$CHUNK_INDEX" "$CHUNKS_CNT"
+	fi
+
+	# ArduinoIDE ESP32S2 Test
+    TARGET="esp32s2"
+	FQBN="espressif:esp32:esp32s2:PSRAM=enabled,PartitionScheme=huge_app"
+	if [ "$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
+	BOARD="esp32dev"
+    OPTIONS="board_build.partitions = huge_app.csv"
+	build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/WiFi/examples/WiFiClient/WiFiClient.ino" && \
+	build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino" && \
+	build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/BluetoothSerial/examples/SerialToSerialBT/SerialToSerialBT.ino" && \
+	build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/BLE/examples/BLE_server/BLE_server.ino" && \
+	build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino"
+	
+	# PlatformIO ESP32 Test
+    # OPTIONS="board_build.mcu = esp32s2"
+    # build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/WiFi/examples/WiFiClient/WiFiClient.ino" && \
+    # build_pio_sketch "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino"
+
+    python -m platformio ci --board "$BOARD" "$PLATFORMIO_ESP32_PATH/libraries/WiFi/examples/WiFiClient" --project-option="board_build.mcu = esp32s2" --project-option="board_build.partitions = huge_app.csv"
+    
+	#build_pio_sketches "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries"
+fi

.github/scripts/on-release.sh

@@ -0,0 +1,380 @@
+#!/bin/bash
+
+if [ ! $GITHUB_EVENT_NAME == "release" ]; then
+    echo "Wrong event '$GITHUB_EVENT_NAME'!"
+    exit 1
+fi
+
+EVENT_JSON=`cat $GITHUB_EVENT_PATH`
+
+action=`echo $EVENT_JSON | jq -r '.action'`
+if [ ! $action == "published" ]; then
+    echo "Wrong action '$action'. Exiting now..."
+    exit 0
+fi
+
+draft=`echo $EVENT_JSON | jq -r '.release.draft'`
+if [ $draft == "true" ]; then
+    echo "It's a draft release. Exiting now..."
+    exit 0
+fi
+
+RELEASE_PRE=`echo $EVENT_JSON | jq -r '.release.prerelease'`
+RELEASE_TAG=`echo $EVENT_JSON | jq -r '.release.tag_name'`
+RELEASE_BRANCH=`echo $EVENT_JSON | jq -r '.release.target_commitish'`
+RELEASE_ID=`echo $EVENT_JSON | jq -r '.release.id'`
+RELEASE_BODY=`echo $EVENT_JSON | jq -r '.release.body'`
+
+OUTPUT_DIR="$GITHUB_WORKSPACE/build"
+PACKAGE_NAME="esp32-$RELEASE_TAG"
+PACKAGE_JSON_MERGE="$GITHUB_WORKSPACE/.github/scripts/merge_packages.py"
+PACKAGE_JSON_TEMPLATE="$GITHUB_WORKSPACE/package/package_esp32_index.template.json"
+PACKAGE_JSON_DEV="package_esp32_dev_index.json"
+PACKAGE_JSON_REL="package_esp32_index.json"
+
+echo "Event: $GITHUB_EVENT_NAME, Repo: $GITHUB_REPOSITORY, Path: $GITHUB_WORKSPACE, Ref: $GITHUB_REF"
+echo "Action: $action, Branch: $RELEASE_BRANCH, ID: $RELEASE_ID" 
+echo "Tag: $RELEASE_TAG, Draft: $draft, Pre-Release: $RELEASE_PRE"
+
+function get_file_size(){
+    local file="$1"
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        eval `stat -s "$file"`
+        local res="$?"
+        echo "$st_size"
+        return $res
+    else
+        stat --printf="%s" "$file"
+        return $?
+    fi
+}
+
+function git_upload_asset(){
+    local name=$(basename "$1")
+    # local mime=$(file -b --mime-type "$1")
+    curl -k -X POST -sH "Authorization: token $GITHUB_TOKEN" -H "Content-Type: application/octet-stream" --data-binary @"$1" "https://uploads.github.com/repos/$GITHUB_REPOSITORY/releases/$RELEASE_ID/assets?name=$name"
+}
+
+function git_safe_upload_asset(){
+    local file="$1"
+    local name=$(basename "$file")
+    local size=`get_file_size "$file"`
+    local upload_res=`git_upload_asset "$file"`
+    if [ $? -ne 0 ]; then 
+        >&2 echo "ERROR: Failed to upload '$name' ($?)"
+        return 1
+    fi
+    up_size=`echo "$upload_res" | jq -r '.size'`
+    if [ $up_size -ne $size ]; then
+        >&2 echo "ERROR: Uploaded size does not match! $up_size != $size"
+        #git_delete_asset
+        return 1
+    fi
+    echo "$upload_res" | jq -r '.browser_download_url'
+    return $?
+}
+
+function git_upload_to_pages(){
+    local path=$1
+    local src=$2
+
+    if [ ! -f "$src" ]; then
+        >&2 echo "Input is not a file! Aborting..."
+        return 1
+    fi
+
+    local info=`curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.object+json" -X GET "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path?ref=gh-pages"`
+    local type=`echo "$info" | jq -r '.type'`
+    local message=$(basename $path)
+    local sha=""
+    local content=""
+
+    if [ $type == "file" ]; then
+        sha=`echo "$info" | jq -r '.sha'`
+        sha=",\"sha\":\"$sha\""
+        message="Updating $message"
+    elif [ ! $type == "null" ]; then
+        >&2 echo "Wrong type '$type'"
+        return 1
+    else
+        message="Creating $message"
+    fi
+
+    content=`base64 -i "$src"`
+    data="{\"branch\":\"gh-pages\",\"message\":\"$message\",\"content\":\"$content\"$sha}"
+
+    echo "$data" | curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.raw+json" -X PUT --data @- "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path"
+}
+
+function git_safe_upload_to_pages(){
+    local path=$1
+    local file="$2"
+    local name=$(basename "$file")
+    local size=`get_file_size "$file"`
+    local upload_res=`git_upload_to_pages "$path" "$file"`
+    if [ $? -ne 0 ]; then 
+        >&2 echo "ERROR: Failed to upload '$name' ($?)"
+        return 1
+    fi
+    up_size=`echo "$upload_res" | jq -r '.content.size'`
+    if [ $up_size -ne $size ]; then
+        >&2 echo "ERROR: Uploaded size does not match! $up_size != $size"
+        #git_delete_asset
+        return 1
+    fi
+    echo "$upload_res" | jq -r '.content.download_url'
+    return $?
+}
+
+function merge_package_json(){
+    local jsonLink=$1
+    local jsonOut=$2
+    local old_json=$OUTPUT_DIR/oldJson.json
+    local merged_json=$OUTPUT_DIR/mergedJson.json
+    
+    echo "Downloading previous JSON $jsonLink ..."
+    curl -L -o "$old_json" "https://github.com/$GITHUB_REPOSITORY/releases/download/$jsonLink?access_token=$GITHUB_TOKEN" 2>/dev/null
+    if [ $? -ne 0 ]; then echo "ERROR: Download Failed! $?"; exit 1; fi
+
+    echo "Creating new JSON ..."
+    set +e
+    stdbuf -oL python "$PACKAGE_JSON_MERGE" "$jsonOut" "$old_json" > "$merged_json"
+    set -e
+    
+    set -v
+    if [ ! -s $merged_json ]; then
+        rm -f "$merged_json"
+        echo "Nothing to merge"
+    else
+        rm -f "$jsonOut"
+        mv "$merged_json" "$jsonOut"
+        echo "JSON data successfully merged"
+    fi
+    rm -f "$old_json"
+    set +v
+}
+
+set -e
+
+##
+## PACKAGE ZIP
+##
+
+mkdir -p "$OUTPUT_DIR"
+PKG_DIR="$OUTPUT_DIR/$PACKAGE_NAME"
+PACKAGE_ZIP="$PACKAGE_NAME.zip"
+
+echo "Updating submodules ..."
+git -C "$GITHUB_WORKSPACE" submodule update --init --recursive > /dev/null 2>&1
+
+mkdir -p "$PKG_DIR/tools"
+
+# Copy all core files to the package folder
+echo "Copying files for packaging ..."
+cp -f  "$GITHUB_WORKSPACE/boards.txt"              "$PKG_DIR/"
+cp -f  "$GITHUB_WORKSPACE/programmers.txt"         "$PKG_DIR/"
+cp -Rf "$GITHUB_WORKSPACE/cores"                   "$PKG_DIR/"
+cp -Rf "$GITHUB_WORKSPACE/libraries"               "$PKG_DIR/"
+cp -Rf "$GITHUB_WORKSPACE/variants"                "$PKG_DIR/"
+cp -f  "$GITHUB_WORKSPACE/tools/espota.exe"        "$PKG_DIR/tools/"
+cp -f  "$GITHUB_WORKSPACE/tools/espota.py"         "$PKG_DIR/tools/"
+cp -f  "$GITHUB_WORKSPACE/tools/esptool.py"        "$PKG_DIR/tools/"
+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/"
+
+# Remove unnecessary files in the package folder
+echo "Cleaning up folders ..."
+find "$PKG_DIR" -name '*.DS_Store' -exec rm -f {} \;
+find "$PKG_DIR" -name '*.git*' -type f -delete
+
+# Replace tools locations in platform.txt
+echo "Generating platform.txt..."
+cat "$GITHUB_WORKSPACE/platform.txt" | \
+sed "s/version=.*/version=$ver$extent/g" | \
+sed 's/runtime.tools.xtensa-esp32-elf-gcc.path={runtime.platform.path}\/tools\/xtensa-esp32-elf//g' | \
+sed 's/tools.esptool_py.path={runtime.platform.path}\/tools\/esptool/tools.esptool_py.path=\{runtime.tools.esptool_py.path\}/g' \
+ > "$PKG_DIR/platform.txt"
+
+# Add header with version information
+echo "Generating core_version.h ..."
+ver_define=`echo $RELEASE_TAG | tr "[:lower:].\055" "[:upper:]_"`
+ver_hex=`git -C "$GITHUB_WORKSPACE" rev-parse --short=8 HEAD 2>/dev/null`
+echo \#define ARDUINO_ESP32_GIT_VER 0x$ver_hex > "$PKG_DIR/cores/esp32/core_version.h"
+echo \#define ARDUINO_ESP32_GIT_DESC `git -C "$GITHUB_WORKSPACE" describe --tags 2>/dev/null` >> "$PKG_DIR/cores/esp32/core_version.h"
+echo \#define ARDUINO_ESP32_RELEASE_$ver_define >> "$PKG_DIR/cores/esp32/core_version.h"
+echo \#define ARDUINO_ESP32_RELEASE \"$ver_define\" >> "$PKG_DIR/cores/esp32/core_version.h"
+
+# Compress package folder
+echo "Creating ZIP ..."
+pushd "$OUTPUT_DIR" >/dev/null
+zip -qr "$PACKAGE_ZIP" "$PACKAGE_NAME"
+if [ $? -ne 0 ]; then echo "ERROR: Failed to create $PACKAGE_ZIP ($?)"; exit 1; fi
+
+# Calculate SHA-256
+echo "Calculating SHA sum ..."
+PACKAGE_PATH="$OUTPUT_DIR/$PACKAGE_ZIP"
+PACKAGE_SHA=`shasum -a 256 "$PACKAGE_ZIP" | cut -f 1 -d ' '`
+PACKAGE_SIZE=`get_file_size "$PACKAGE_ZIP"`
+popd >/dev/null
+rm -rf "$PKG_DIR"
+echo "'$PACKAGE_ZIP' Created! Size: $PACKAGE_SIZE, SHA-256: $PACKAGE_SHA"
+echo
+
+# Upload package to release page
+echo "Uploading package to release page ..."
+PACKAGE_URL=`git_safe_upload_asset "$PACKAGE_PATH"`
+echo "Package Uploaded"
+echo "Download URL: $PACKAGE_URL"
+echo
+
+##
+## PACKAGE JSON
+##
+
+# Construct JQ argument with package data
+jq_arg=".packages[0].platforms[0].version = \"$RELEASE_TAG\" | \
+    .packages[0].platforms[0].url = \"$PACKAGE_URL\" |\
+    .packages[0].platforms[0].archiveFileName = \"$PACKAGE_ZIP\" |\
+    .packages[0].platforms[0].size = \"$PACKAGE_SIZE\" |\
+    .packages[0].platforms[0].checksum = \"SHA-256:$PACKAGE_SHA\""
+
+# Generate package JSONs
+echo "Genarating $PACKAGE_JSON_DEV ..."
+cat "$PACKAGE_JSON_TEMPLATE" | jq "$jq_arg" > "$OUTPUT_DIR/$PACKAGE_JSON_DEV"
+if [ "$RELEASE_PRE" == "false" ]; then
+    echo "Genarating $PACKAGE_JSON_REL ..."
+    cat "$PACKAGE_JSON_TEMPLATE" | jq "$jq_arg" > "$OUTPUT_DIR/$PACKAGE_JSON_REL"
+fi
+
+# Figure out the last release or pre-release
+echo "Getting previous releases ..."
+releasesJson=`curl -sH "Authorization: token $GITHUB_TOKEN" "https://api.github.com/repos/$GITHUB_REPOSITORY/releases" 2>/dev/null`
+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')
+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')
+fi
+COMMITS_SINCE_RELEASE="$prev_any_release"
+shopt -u nocasematch
+set -e
+
+# Merge package JSONs with previous releases
+if [ ! -z "$prev_any_release" ] && [ "$prev_any_release" != "null" ]; then
+    echo "Merging with JSON from $prev_any_release ..."
+    merge_package_json "$prev_any_release/$PACKAGE_JSON_DEV" "$OUTPUT_DIR/$PACKAGE_JSON_DEV"
+fi
+
+if [ "$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/$PACKAGE_JSON_DEV"`
+echo "Pages URL: "`git_safe_upload_to_pages "$PACKAGE_JSON_DEV" "$OUTPUT_DIR/$PACKAGE_JSON_DEV"`
+echo
+if [ "$RELEASE_PRE" == "false" ]; then
+    echo "Uploading $PACKAGE_JSON_REL ..."
+    echo "Download URL: "`git_safe_upload_asset "$OUTPUT_DIR/$PACKAGE_JSON_REL"`
+    echo "Pages URL: "`git_safe_upload_to_pages "$PACKAGE_JSON_REL" "$OUTPUT_DIR/$PACKAGE_JSON_REL"`
+    echo
+fi
+
+##
+## RELEASE NOTES
+##
+
+# Create release notes
+echo "Preparing release notes ..."
+releaseNotes=""
+
+# Process annotated tags
+relNotesRaw=`git -C "$GITHUB_WORKSPACE" show -s --format=%b $RELEASE_TAG`
+readarray -t msgArray <<<"$relNotesRaw"
+arrLen=${#msgArray[@]}
+if [ $arrLen > 3 ] && [ "${msgArray[0]:0:3}" == "tag" ]; then 
+    ind=3
+    while [ $ind -lt $arrLen ]; do
+        if [ $ind -eq 3 ]; then
+            releaseNotes="#### ${msgArray[ind]}"
+            releaseNotes+=$'\r\n'
+        else
+            oneLine="$(echo -e "${msgArray[ind]}" | sed -e 's/^[[:space:]]*//')"
+            if [ ${#oneLine} -gt 0 ]; then
+                if [ "${oneLine:0:2}" == "* " ]; then oneLine=$(echo ${oneLine/\*/-}); fi
+                if [ "${oneLine:0:2}" != "- " ]; then releaseNotes+="- "; fi        
+                releaseNotes+="$oneLine"
+                releaseNotes+=$'\r\n'
+            fi
+        fi
+        let ind=$ind+1
+    done
+fi
+
+# Append Commit Messages
+if [ ! -z "$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 $COMMITS_SINCE_RELEASE.. > "$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 $commitFile
+fi
+
+# Prepend the original release body
+if [ "${RELEASE_BODY: -1}" == $'\r' ]; then         
+    RELEASE_BODY="${RELEASE_BODY:0:-1}"
+else 
+    RELEASE_BODY="$RELEASE_BODY"
+fi
+RELEASE_BODY+=$'\r\n'
+releaseNotes="$RELEASE_BODY$releaseNotes"
+
+# Update release page
+echo "Updating release notes ..."
+releaseNotes=$(printf '%s' "$releaseNotes" | python -c 'import json,sys; print(json.dumps(sys.stdin.read()))')
+releaseNotes=${releaseNotes:1:-1}
+curlData="{\"body\": \"$releaseNotes\"}"
+releaseData=`curl --data "$curlData" "https://api.github.com/repos/$GITHUB_REPOSITORY/releases/$RELEASE_ID?access_token=$GITHUB_TOKEN" 2>/dev/null`
+if [ $? -ne 0 ]; then echo "ERROR: Updating Release Failed: $?"; exit 1; fi
+echo "Release notes successfully updated"
+echo
+
+##
+## SUBMODULE VERSIONS
+##
+
+# Upload submodules versions
+echo "Generating submodules.txt ..."
+git -C "$GITHUB_WORKSPACE" submodule status > "$OUTPUT_DIR/submodules.txt"
+echo "Uploading submodules.txt ..."
+echo "Download URL: "`git_safe_upload_asset "$OUTPUT_DIR/submodules.txt"`
+echo ""
+set +e
+
+##
+## DONE
+##
+echo "DONE!"

.github/stale.yml

@@ -0,0 +1,64 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 60
+
+# 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
+
+# Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
+onlyLabels: []
+
+# 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

.github/workflows/gh-pages.yml

@@ -0,0 +1,21 @@
+name: GitHub Pages CI
+
+on:
+  push:
+    branches:
+    - master
+    paths:
+    - 'README.md'
+    - 'docs/**'
+
+jobs:
+
+  build-pages:
+    name: Build GitHub Pages
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Copy Files
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: bash ./.github/scripts/on-pages.sh

.github/workflows/push.yml

@@ -0,0 +1,58 @@
+name: ESP32 Arduino CI
+
+on:
+  push:
+    branches:
+    - master
+    - release/*
+  pull_request:
+
+jobs:
+  
+  # Ubuntu
+  build-arduino-linux:
+    name: Arduino ${{ matrix.chunk }} on ubuntu-latest
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        chunk: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+    
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - name: Build Sketches
+      run: bash ./.github/scripts/on-push.sh ${{ matrix.chunk }} 15
+
+  # Windows and MacOS
+  build-arduino-win-mac:
+    name: Arduino on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, macOS-latest]
+    
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - name: Build Sketches
+      run: bash ./.github/scripts/on-push.sh
+
+  # PlatformIO on Windows, Ubuntu and Mac
+  build-platformio:
+    name: PlatformIO on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+    
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - name: Build Sketches
+      run: bash ./.github/scripts/on-push.sh 1 1 #equal and non-zero to trigger PIO

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+name: ESP32 Arduino Release
+
+on:
+  release:
+    types: published
+
+jobs:
+  build:
+    name: Publish Release
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@master
+    - uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - name: Build Release
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: bash ./.github/scripts/on-release.sh

.gitignore

@@ -1,7 +1,18 @@
 tools/xtensa-esp32-elf
+tools/xtensa-esp32s2-elf
 tools/dist
 tools/esptool
 tools/esptool.exe
 tools/mkspiffs/mkspiffs
 tools/mkspiffs/mkspiffs.exe
 .DS_Store
+ 
+#Ignore files built by Visual Studio/Visual Micro
+[Dd]ebug*/
+[Rr]elease*/
+.vs/
+__vm/
+*.vcxproj*
+.vscode/
+platform.sloeber.txt
+boards.sloeber.txt

.gitmodules

@@ -1,6 +0,0 @@
-[submodule "libraries/BLE"]
-	path = libraries/BLE
-	url = https://github.com/nkolban/ESP32_BLE_Arduino.git
-[submodule "libraries/AzureIoT"]
-	path = libraries/AzureIoT
-	url = https://github.com/VSChina/ESP32_AzureIoT_Arduino

.travis.yml

@@ -1,8 +1,6 @@
 sudo: false
 
 language: python
-python:
-  - "2.7"
 
 os:
   - linux
@@ -10,22 +8,40 @@ os:
 git:
   depth: false
 
-env:
+before_install:
-    global:
+  - git submodule update --init --recursive
-        - secure: "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"
-        - REMOTE_URL=https://github.com/$TRAVIS_REPO_SLUG/releases/download/$TRAVIS_TAG
-    
-script:
-  - bash $TRAVIS_BUILD_DIR/tools/build.sh
 
-deploy:
+stages:
-  provider: script
+  - build
-  skip_cleanup: true
+  - deploy
-  script: bash $TRAVIS_BUILD_DIR/tools/deploy.sh -t$TRAVIS_TAG -a$ESP32_GITHUB_TOKEN -s$TRAVIS_REPO_SLUG -drelease
 
-  on:
+jobs:
-    tags: true
+  include:
 
+    - name: "Build Arduino 0"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 0 10
+
+    - name: "Build Arduino 1"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 1 10
+
+    - name: "Build Arduino 2"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 2 10
+
+    - name: "Build Arduino 3"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 3 10
+
+    - name: "Build PlatformIO"
+      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
+      stage: build
+      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 1 1
 
 notifications:
   email:

CMakeLists.txt

@@ -15,6 +15,7 @@ set(CORE_SRCS
   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
@@ -31,6 +32,8 @@ set(CORE_SRCS
   cores/esp32/stdlib_noniso.c
   cores/esp32/Stream.cpp
   cores/esp32/StreamString.cpp
+  cores/esp32/USB.cpp
+  cores/esp32/USBCDC.cpp
   cores/esp32/wiring_pulse.c
   cores/esp32/wiring_shift.c
   cores/esp32/WMath.cpp
@@ -49,6 +52,7 @@ set(LIBRARY_SRCS
   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/SD_MMC/src/SD_MMC.cpp
@@ -71,6 +75,7 @@ set(LIBRARY_SRCS
   libraries/WiFi/src/WiFi.cpp
   libraries/WiFi/src/WiFiGeneric.cpp
   libraries/WiFi/src/WiFiMulti.cpp
+  libraries/WiFi/src/WiFiProv.cpp
   libraries/WiFi/src/WiFiScan.cpp
   libraries/WiFi/src/WiFiServer.cpp
   libraries/WiFi/src/WiFiSTA.cpp
@@ -78,66 +83,6 @@ set(LIBRARY_SRCS
   libraries/Wire/src/Wire.cpp
   )
 
-set(AZURE_SRCS
-  libraries/AzureIoT/src/az_iot/azureiotcerts.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/agenttime.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/dns_async.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/lock.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/threadapi.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/tickcounter.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/lwip/sntp_lwip.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/socket_async.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/src/platform_openssl_compact.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/src/tlsio_openssl_compact.c
-  libraries/AzureIoT/src/az_iot/c-utility/pal/tlsio_options.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/base64.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/buffer.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/connection_string_parser.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/consolelogger.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/constbuffer.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/constmap.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/crt_abstractions.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/doublylinkedlist.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/gballoc.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/gb_stdio.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/gb_time.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/hmac.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/hmacsha256.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/httpapiex.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/httpapiexsas.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/httpheaders.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/http_proxy_io.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/map.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/optionhandler.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/sastoken.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/sha1.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/sha224.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/sha384-512.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/singlylinkedlist.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/strings.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/string_tokenizer.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/urlencode.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/usha.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/vector.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/xio.c
-  libraries/AzureIoT/src/az_iot/c-utility/src/xlogging.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/blob.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_authorization.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_ll.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_retry_control.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_message.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransportmqtt.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport_mqtt_common.c
-  libraries/AzureIoT/src/az_iot/iothub_client/src/version.c
-  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_client.c
-  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_codec.c
-  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_message.c
-  libraries/AzureIoT/src/AzureIotHub.cpp
-  libraries/AzureIoT/src/Esp32MQTTClient.cpp
-  )
-
 set(BLE_SRCS
   libraries/BLE/src/BLE2902.cpp
   libraries/BLE/src/BLE2904.cpp
@@ -170,14 +115,12 @@ set(BLE_SRCS
   libraries/BLE/src/GeneralUtils.cpp
   )
 
-set(COMPONENT_SRCS ${CORE_SRCS} ${LIBRARY_SRCS} ${AZURE_SRCS} ${BLE_SRCS})
 
-set(COMPONENT_ADD_INCLUDEDIRS
+set(includedirs
   variants/esp32/
   cores/esp32/
   libraries/ArduinoOTA/src
   libraries/AsyncUDP/src
-  libraries/AzureIoT/src
   libraries/BLE/src
   libraries/BluetoothSerial/src
   libraries/DNSServer/src
@@ -188,6 +131,7 @@ set(COMPONENT_ADD_INCLUDEDIRS
   libraries/FS/src
   libraries/HTTPClient/src
   libraries/HTTPUpdate/src
+  libraries/LITTLEFS/src
   libraries/NetBIOS/src
   libraries/Preferences/src
   libraries/SD_MMC/src
@@ -203,9 +147,16 @@ set(COMPONENT_ADD_INCLUDEDIRS
   libraries/Wire/src
   )
 
-set(COMPONENT_PRIV_INCLUDEDIRS cores/esp32/libb64)
+set(srcs ${CORE_SRCS} ${LIBRARY_SRCS} ${BLE_SRCS})
+set(priv_includes cores/esp32/libb64)
+set(requires spi_flash mbedtls mdns esp_adc_cal)
+set(priv_requires fatfs nvs_flash app_update spiffs bootloader_support openssl bt tinyusb main)
 
-set(COMPONENT_REQUIRES spi_flash mbedtls mdns ethernet)
+idf_component_register(INCLUDE_DIRS ${includedirs} PRIV_INCLUDE_DIRS ${priv_includes} SRCS ${srcs} REQUIRES ${requires} PRIV_REQUIRES ${priv_requires})
-set(COMPONENT_PRIV_REQUIRES fatfs nvs_flash app_update spiffs bootloader_support openssl bt)
 
-register_component()
+if(IDF_TARGET STREQUAL "esp32")
+target_compile_options(${COMPONENT_TARGET} PUBLIC -DARDUINO=10812 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DESP32)
+endif()
+if(IDF_TARGET STREQUAL "esp32s2")
+target_compile_options(${COMPONENT_TARGET} PUBLIC -DARDUINO=10812 -DARDUINO_ESP32S2_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32S2_DEV" -DARDUINO_VARIANT="esp32s2" -DESP32)
+endif()

Kconfig.projbuild

@@ -5,7 +5,7 @@ config ENABLE_ARDUINO_DEPENDS
     select LWIP_SO_RCVBUF
     select ETHERNET
     select WIFI_ENABLED
-    select ESP32_PHY_CALIBRATION_AND_DATA_STORAGE
+    select ESP32_PHY_CALIBRATION_AND_DATA_STORAGE if IDF_TARGET_ESP32
     select MEMMAP_SMP
     default "y"
 
@@ -19,6 +19,79 @@ config AUTOSTART_ARDUINO
         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
+
+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_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"
+    help
+        Enabling this option will Attach all interrupts with the IRAm flag.
+        It will also make some HAL function, like, digitalRead/Write and more
+				be loaded into IRAM for access inside ISRs.
+				Beware that this is a very dangerous setting. Enable it only if you
+				are fully aware of the consequences.
+
 config DISABLE_HAL_LOCKS
     bool "Disable mutex locks for HAL"
     default "n"
@@ -168,6 +241,12 @@ config ARDUINO_SELECTIVE_ESPmDNS
     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

LICENSE.md

@@ -0,0 +1,503 @@
+### GNU LESSER GENERAL PUBLIC LICENSE
+
+Version 2.1, February 1999
+
+    Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+    51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+    
+    Everyone is permitted to copy and distribute verbatim copies
+    of this license document, but changing it is not allowed.
+
+    [This is the first released version of the Lesser GPL.  It also counts
+     as the successor of the GNU Library Public License, version 2, hence
+     the version number 2.1.]
+
+### Preamble
+
+The licenses for most software are designed to take away your freedom
+to share and change it. By contrast, the GNU General Public Licenses
+are intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.
+
+This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it. You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations
+below.
+
+When we speak of free software, we are referring to freedom of use,
+not price. Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights. These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you. You must make sure that they, too, receive or can get the source
+code. If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it. And you must show them these terms so they know their rights.
+
+We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+To protect each distributor, we want to make it very clear that there
+is no warranty for the free library. Also, if the library is modified
+by someone else and passed on, the recipients should know that what
+they have is not the original version, so that the original author's
+reputation will not be affected by problems that might be introduced
+by others.
+
+Finally, software patents pose a constant threat to the existence of
+any free program. We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder. Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
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README.md

@@ -1,4 +1,5 @@
-# Arduino core for ESP32 WiFi chip    [![Build Status](https://travis-ci.org/espressif/arduino-esp32.svg?branch=master)](https://travis-ci.org/espressif/arduino-esp32)
+# 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)
 
 ### 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)
 
@@ -9,17 +10,12 @@
 - [Issue/Bug report template](#issuebug-report-template)
 - [ESP32Dev Board PINMAP](#esp32dev-board-pinmap)
 
-## Development Status
+### Development Status
 [Latest stable release ![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32.svg?style=plastic) ![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)
 
 [Latest development release ![Development Version](https://img.shields.io/github/release/espressif/arduino-esp32/all.svg?style=plastic) ![Development 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)
 
-Most of the framework is implemented. Most noticable is the missing analogWrite. While analogWrite is on it's way, there are a few other options that you can use:
+### Installation Instructions
-- 16 channels [LEDC](cores/esp32/esp32-hal-ledc.h) which is PWM
-- 8 channels [SigmaDelta](cores/esp32/esp32-hal-sigmadelta.h) which uses SigmaDelta modulation
-- 2 channels [DAC](cores/esp32/esp32-hal-dac.h) which gives real analog output
-
-## 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
@@ -33,20 +29,19 @@ Most of the framework is implemented. Most noticable is the missing analogWrite.
 - [Using as ESP-IDF component](docs/esp-idf_component.md)
 - [Using OTAWebUpdater](docs/OTAWebUpdate/OTAWebUpdate.md)
 
-#### Decoding exceptions
+### Decoding exceptions
 
 You can use [EspExceptionDecoder](https://github.com/me-no-dev/EspExceptionDecoder) to get meaningful call trace.
 
-#### Issue/Bug report template
+### 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).
 
-Finally, if you're 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
-## ESP32Dev Board PINMAP
 
 ![Pin Functions](docs/esp32_pinmap.png)
 
-## Hint
+### Tip
 
 Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process

appveyor.yml

@@ -1,19 +0,0 @@
-build: off
-environment:
-
-  matrix:
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiClient"
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiClientBasic"
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiClientEvents"
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiIPv6"
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiScan"
-    - PLATFORMIO_CI_SRC: "libraries/WiFi/examples/WiFiSmartConfig"
-
-install:
-  - cmd: git submodule update --init --recursive
-  - cmd: SET PATH=%PATH%;C:\Python27\Scripts
-  - cmd: pip install -U https://github.com/platformio/platformio/archive/develop.zip
-  - cmd: platformio platform install https://github.com/platformio/platform-espressif32.git#feature/stage
-
-test_script:
-  - cmd: platformio ci -b esp32dev -b nano32 -b node32s

cores/esp32/Arduino.h

@@ -68,12 +68,6 @@
 #define __STRINGIFY(a) #a
 #endif
 
-// undefine stdlib's abs if encountered
-#ifdef abs
-#undef abs
-#endif
-
-#define abs(x) ((x)>0?(x):-(x))
 #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)
@@ -121,10 +115,12 @@ 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);
 
@@ -160,6 +156,7 @@ void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
 #include "HardwareSerial.h"
 #include "Esp.h"
 
+using std::abs;
 using std::isinf;
 using std::isnan;
 using std::max;

cores/esp32/Esp.cpp

@@ -19,7 +19,6 @@
 
 #include "Arduino.h"
 #include "Esp.h"
-#include "rom/spi_flash.h"
 #include "esp_sleep.h"
 #include "esp_spi_flash.h"
 #include <memory>
@@ -32,6 +31,19 @@ extern "C" {
 }
 #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"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/spi_flash.h"
+#endif
+
 /**
  * User-defined Literals
  *  usage:
@@ -92,13 +104,6 @@ void EspClass::deepSleep(uint32_t time_us)
     esp_deep_sleep(time_us);
 }
 
-uint32_t EspClass::getCycleCount()
-{
-    uint32_t ccount;
-    __asm__ __volatile__("esync; rsr %0,ccount":"=a" (ccount));
-    return ccount;
-}
-
 void EspClass::restart(void)
 {
     esp_restart();
@@ -128,24 +133,36 @@ uint32_t EspClass::getMaxAllocHeap(void)
 
 uint32_t EspClass::getPsramSize(void)
 {
-    multi_heap_info_t info;
+	if(psramFound()){
-    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+	    multi_heap_info_t info;
-    return info.total_free_bytes + info.total_allocated_bytes;
+	    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+	    return info.total_free_bytes + info.total_allocated_bytes;
+	}
+	return 0;
 }
 
 uint32_t EspClass::getFreePsram(void)
 {
-    return heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+	if(psramFound()){
+	    return heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
 }
 
 uint32_t EspClass::getMinFreePsram(void)
 {
-    return heap_caps_get_minimum_free_size(MALLOC_CAP_SPIRAM);
+	if(psramFound()){
+	    return heap_caps_get_minimum_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
 }
 
 uint32_t EspClass::getMaxAllocPsram(void)
 {
-    return heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM);
+	if(psramFound()){
+	    return heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
 }
 
 static uint32_t sketchSize(sketchSize_t response) {

cores/esp32/Esp.h

@@ -75,8 +75,8 @@ public:
     uint32_t getMaxAllocPsram();
 
     uint8_t getChipRevision();
-    uint8_t getCpuFreqMHz(){ return CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ; }
+    uint32_t getCpuFreqMHz(){ return getCpuFrequencyMhz(); }
-    uint32_t getCycleCount();
+    inline uint32_t getCycleCount() __attribute__((always_inline));
     const char * getSdkVersion();
 
     void deepSleep(uint32_t time_us);
@@ -101,6 +101,13 @@ public:
 
 };
 
+uint32_t ARDUINO_ISR_ATTR EspClass::getCycleCount()
+{
+    uint32_t ccount;
+    __asm__ __volatile__("esync; rsr %0,ccount":"=a" (ccount));
+    return ccount;
+}
+
 extern EspClass ESP;
 
 #endif //ESP_H

cores/esp32/FunctionalInterrupt.cpp

@@ -16,7 +16,7 @@ extern "C"
 	extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc, void * arg, int intr_type, bool functional);
 }
 
-void IRAM_ATTR interruptFunctional(void* arg)
+void ARDUINO_ISR_ATTR interruptFunctional(void* arg)
 {
     InterruptArgStructure* localArg = (InterruptArgStructure*)arg;
 	if (localArg->interruptFunction)

cores/esp32/HardwareSerial.cpp

@@ -6,6 +6,8 @@
 #include "pins_arduino.h"
 #include "HardwareSerial.h"
 
+#if CONFIG_IDF_TARGET_ESP32
+
 #ifndef RX1
 #define RX1 9
 #endif
@@ -22,11 +24,29 @@
 #define TX2 17
 #endif
 
+#else
+
+#ifndef RX1
+#define RX1 18
+#endif
+
+#ifndef TX1
+#define TX1 17
+#endif
+
+#endif
+
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+HardwareSerial Serial0(0);
+#else
 HardwareSerial Serial(0);
+#endif
 HardwareSerial Serial1(1);
+#if CONFIG_IDF_TARGET_ESP32
 HardwareSerial Serial2(2);
 #endif
+#endif
 
 HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}
 
@@ -40,21 +60,28 @@ void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, in
         end();
     }
     if(_uart_nr == 0 && rxPin < 0 && txPin < 0) {
+#if CONFIG_IDF_TARGET_ESP32
         rxPin = 3;
         txPin = 1;
+#elif CONFIG_IDF_TARGET_ESP32S2
+        rxPin = 44;
+        txPin = 43;
+#endif
     }
     if(_uart_nr == 1 && rxPin < 0 && txPin < 0) {
         rxPin = RX1;
         txPin = TX1;
     }
+#if CONFIG_IDF_TARGET_ESP32
     if(_uart_nr == 2 && rxPin < 0 && txPin < 0) {
         rxPin = RX2;
         txPin = TX2;
     }
-
+#endif
     _uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, 256, invert);
 
     if(!baud) {
+        uartStartDetectBaudrate(_uart);
         time_t startMillis = millis();
         unsigned long detectedBaudRate = 0;
         while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {
@@ -100,7 +127,7 @@ void HardwareSerial::setDebugOutput(bool en)
         uartSetDebug(_uart);
     } else {
         if(uartGetDebug() == _uart_nr) {
-            uartSetDebug(0);
+            uartSetDebug(NULL);
         }
     }
 }
@@ -130,11 +157,34 @@ int HardwareSerial::read(void)
     return -1;
 }
 
-void HardwareSerial::flush()
+// 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);

cores/esp32/HardwareSerial.h

@@ -62,10 +62,19 @@ public:
     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));
@@ -97,10 +106,23 @@ protected:
     uart_t* _uart;
 };
 
+extern void serialEventRun(void) __attribute__((weak));
+
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#ifndef ARDUINO_SERIAL_PORT
+#define ARDUINO_SERIAL_PORT 0
+#endif
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+#include "USB.h"
+#include "USBCDC.h"
+extern HardwareSerial Serial0;
+#else
 extern HardwareSerial Serial;
+#endif
 extern HardwareSerial Serial1;
+#if CONFIG_IDF_TARGET_ESP32
 extern HardwareSerial Serial2;
 #endif
-
 #endif
+
+#endif // HardwareSerial_h

cores/esp32/MD5Builder.h

@@ -21,7 +21,19 @@
 
 #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"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
 #include "rom/md5_hash.h"
+#endif
 
 class MD5Builder
 {

cores/esp32/Print.cpp

@@ -52,19 +52,24 @@ size_t Print::printf(const char *format, ...)
     va_list copy;
     va_start(arg, format);
     va_copy(copy, arg);
-    size_t len = vsnprintf(NULL, 0, format, 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 = new char[len+1];
+        temp = (char*) malloc(len+1);
         if(temp == NULL) {
+            va_end(arg);
             return 0;
         }
+        len = vsnprintf(temp, len+1, format, arg);
     }
-    len = vsnprintf(temp, len+1, format, arg);
-    write((uint8_t*)temp, len);
     va_end(arg);
-    if(len >= sizeof(loc_buf)){
+    len = write((uint8_t*)temp, len);
-        delete[] temp;
+    if(temp != loc_buf){
+        free(temp);
     }
     return len;
 }
@@ -154,8 +159,10 @@ size_t Print::print(struct tm * timeinfo, const char * format)
     }
     char buf[64];
     size_t written = strftime(buf, 64, f, timeinfo);
-    print(buf);
+    if(written == 0){
-    return written;
+        return written;
+    }
+    return print(buf);
 }
 
 size_t Print::println(void)

cores/esp32/Stream.cpp

@@ -82,6 +82,9 @@ void Stream::setTimeout(unsigned long timeout)  // sets the maximum number of mi
 {
     _timeout = timeout;
 }
+unsigned long Stream::getTimeout(void) {
+  return _timeout;
+}
 
 // find returns true if the target string is found
 bool Stream::find(const char *target)

cores/esp32/Stream.h

@@ -59,7 +59,7 @@ public:
 // 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)
     {
@@ -97,8 +97,8 @@ public:
 
     float parseFloat();               // float version of parseInt
 
-    size_t readBytes(char *buffer, size_t length); // read chars from stream into buffer
+    virtual size_t readBytes(char *buffer, size_t length); // read chars from stream into buffer
-    size_t readBytes(uint8_t *buffer, size_t length)
+    virtual size_t readBytes(uint8_t *buffer, size_t length)
     {
         return readBytes((char *) buffer, length);
     }
@@ -114,7 +114,7 @@ public:
     // returns the number of characters placed in the buffer (0 means no valid data found)
 
     // Arduino String functions to be added here
-    String readString();
+    virtual String readString();
     String readStringUntil(char terminator);
 
 protected:

cores/esp32/StreamString.cpp

@@ -2,6 +2,7 @@
  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
@@ -22,31 +23,28 @@
 #include <Arduino.h>
 #include "StreamString.h"
 
-size_t StreamString::write(const uint8_t *data, size_t size)
+size_t StreamString::write(const uint8_t *data, size_t size) {
-{
     if(size && data) {
-        if(reserve(length() + size + 1)) {
+        const unsigned int newlen = length() + size;
-            memcpy((void *) (buffer + len), (const void *) data, size);
+        if(reserve(newlen + 1)) {
-            len += size;
+            memcpy((void *) (wbuffer() + len()), (const void *) data, size);
-            *(buffer + len) = 0x00; // add null for string end
+            setLen(newlen);
+            *(wbuffer() + newlen) = 0x00; // add null for string end
             return size;
         }
     }
     return 0;
 }
 
-size_t StreamString::write(uint8_t data)
+size_t StreamString::write(uint8_t data) {
-{
     return concat((char) data);
 }
 
-int StreamString::available()
+int StreamString::available() {
-{
     return length();
 }
 
-int StreamString::read()
+int StreamString::read() {
-{
     if(length()) {
         char c = charAt(0);
         remove(0, 1);
@@ -56,8 +54,7 @@ int StreamString::read()
     return -1;
 }
 
-int StreamString::peek()
+int StreamString::peek() {
-{
     if(length()) {
         char c = charAt(0);
         return c;
@@ -65,7 +62,6 @@ int StreamString::peek()
     return -1;
 }
 
-void StreamString::flush()
+void StreamString::flush() {
-{
 }
 

cores/esp32/USB.cpp

@@ -0,0 +1,338 @@
+// 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 "esp32-hal.h"
+#include "esp32-hal-tinyusb.h"
+#include "USB.h"
+#if CONFIG_USB_ENABLED
+
+#ifndef USB_VID
+#define USB_VID USB_ESPRESSIF_VID
+#endif
+#ifndef USB_PID
+#define USB_PID 0x0002
+#endif
+#ifndef USB_MANUFACTURER
+#define USB_MANUFACTURER "Espressif Systems"
+#endif
+#ifndef USB_PRODUCT
+#define USB_PRODUCT ARDUINO_BOARD
+#endif
+#ifndef USB_SERIAL
+#define USB_SERIAL "0"
+#endif
+
+extern "C" {
+#include "tinyusb.h"
+}
+
+#if CFG_TUD_DFU_RT
+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");
+    uint8_t descriptor[TUD_DFU_RT_DESC_LEN] = {
+            // Interface number, string index, attributes, detach timeout, transfer size */
+            TUD_DFU_RT_DESCRIPTOR(*itf, str_index, DFU_ATTRS, 700, 64)
+    };
+    *itf+=1;
+    memcpy(dst, descriptor, TUD_DFU_RT_DESC_LEN);
+    return TUD_DFU_RT_DESC_LEN;
+}
+// Invoked on DFU_DETACH request to reboot to the bootloader
+void tud_dfu_rt_reboot_to_dfu(void)
+{
+    usb_persist_restart(RESTART_BOOTLOADER_DFU);
+}
+#endif /* CFG_TUD_DFU_RT */
+
+ESP_EVENT_DEFINE_BASE(ARDUINO_USB_EVENTS);
+
+static esp_event_loop_handle_t arduino_usb_event_loop_handle = NULL;
+
+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){
+    if(arduino_usb_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_post_to(arduino_usb_event_loop_handle, event_base, event_id, event_data, event_data_size, 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){
+    if(arduino_usb_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_handler_register_with(arduino_usb_event_loop_handle, event_base, event_id, event_handler, event_handler_arg);
+}
+
+static bool tinyusb_device_mounted = false;
+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_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_post(ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
+}
+
+// Invoked when usb bus is suspended
+// 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};
+    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);
+}
+
+// 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_post(ARDUINO_USB_EVENTS, ARDUINO_USB_RESUME_EVENT, &p, sizeof(arduino_usb_event_data_t), portMAX_DELAY);
+}
+
+ESPUSB::ESPUSB(size_t task_stack_size, uint8_t event_task_priority)
+:vid(USB_VID)
+,pid(USB_PID)
+,product_name(USB_PRODUCT)
+,manufacturer_name(USB_MANUFACTURER)
+,serial_number(USB_SERIAL)
+,fw_version(0x0100)
+,usb_version(0x0200)// at least 2.1 or 3.x for BOS & webUSB
+,usb_class(TUSB_CLASS_MISC)
+,usb_subclass(MISC_SUBCLASS_COMMON)
+,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")
+,_started(false)
+,_task_stack_size(task_stack_size)
+,_event_task_priority(event_task_priority)
+{
+    if (!arduino_usb_event_loop_handle) {
+        esp_event_loop_args_t event_task_args = {
+            .queue_size = 5,
+            .task_name = "arduino_usb_events",
+            .task_priority = _event_task_priority,
+            .task_stack_size = _task_stack_size,
+            .task_core_id = tskNO_AFFINITY
+        };
+        if (esp_event_loop_create(&event_task_args, &arduino_usb_event_loop_handle) != ESP_OK) {
+            log_e("esp_event_loop_create failed");
+        }
+    }
+}
+
+ESPUSB::~ESPUSB(){
+    if (arduino_usb_event_loop_handle) {
+        esp_event_loop_delete(arduino_usb_event_loop_handle);
+        arduino_usb_event_loop_handle = NULL;
+    }
+}
+
+bool ESPUSB::begin(){
+    if(!_started){
+        tinyusb_device_config_t tinyusb_device_config = {
+                .vid = vid,
+                .pid = pid,
+                .product_name = product_name.c_str(),
+                .manufacturer_name = manufacturer_name.c_str(),
+                .serial_number = serial_number.c_str(),
+                .fw_version = fw_version,
+                .usb_version = usb_version,
+                .usb_class = usb_class,
+                .usb_subclass = usb_subclass,
+                .usb_protocol = usb_protocol,
+                .usb_attributes = usb_attributes,
+                .usb_power_ma = usb_power_ma,
+                .webusb_enabled = webusb_enabled,
+                .webusb_url = webusb_url.c_str()
+        };
+        _started = tinyusb_init(&tinyusb_device_config) == ESP_OK; 
+    }
+    return _started;
+}
+
+void ESPUSB::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_USB_ANY_EVENT, callback);
+}
+void ESPUSB::onEvent(arduino_usb_event_t event, esp_event_handler_t callback){
+    arduino_usb_event_handler_register_with(ARDUINO_USB_EVENTS, event, callback, this);
+}
+
+ESPUSB::operator bool() const
+{
+    return _started && tinyusb_device_mounted;
+}
+
+bool ESPUSB::enableDFU(){
+#if CFG_TUD_DFU_RT
+    return tinyusb_enable_interface(USB_INTERFACE_DFU, TUD_DFU_RT_DESC_LEN, load_dfu_descriptor) == ESP_OK;
+#endif /* CFG_TUD_DFU_RT */
+    return false;
+}
+
+bool ESPUSB::VID(uint16_t v){
+    if(!_started){
+        vid = v;
+    }
+    return !_started;
+}
+uint16_t ESPUSB::VID(void){
+    return vid;
+}
+
+bool ESPUSB::PID(uint16_t p){
+    if(!_started){
+        pid = p;
+    }
+    return !_started;
+}
+uint16_t ESPUSB::PID(void){
+    return pid;
+}
+
+bool ESPUSB::firmwareVersion(uint16_t version){
+    if(!_started){
+        fw_version = version;
+    }
+    return !_started;
+}
+uint16_t ESPUSB::firmwareVersion(void){
+    return fw_version;
+}
+
+bool ESPUSB::usbVersion(uint16_t version){
+    if(!_started){
+        usb_version = version;
+    }
+    return !_started;
+}
+uint16_t ESPUSB::usbVersion(void){
+    return usb_version;
+}
+
+bool ESPUSB::usbPower(uint16_t mA){
+    if(!_started){
+        usb_power_ma = mA;
+    }
+    return !_started;
+}
+uint16_t ESPUSB::usbPower(void){
+    return usb_power_ma;
+}
+
+bool ESPUSB::usbClass(uint8_t _class){
+    if(!_started){
+        usb_class = _class;
+    }
+    return !_started;
+}
+uint8_t ESPUSB::usbClass(void){
+    return usb_class;
+}
+
+bool ESPUSB::usbSubClass(uint8_t subClass){
+    if(!_started){
+        usb_subclass = subClass;
+    }
+    return !_started;
+}
+uint8_t ESPUSB::usbSubClass(void){
+    return usb_subclass;
+}
+
+bool ESPUSB::usbProtocol(uint8_t protocol){
+    if(!_started){
+        usb_protocol = protocol;
+    }
+    return !_started;
+}
+uint8_t ESPUSB::usbProtocol(void){
+    return usb_protocol;
+}
+
+bool ESPUSB::usbAttributes(uint8_t attr){
+    if(!_started){
+        usb_attributes = attr;
+    }
+    return !_started;
+}
+uint8_t ESPUSB::usbAttributes(void){
+    return usb_attributes;
+}
+
+bool ESPUSB::webUSB(bool enabled){
+    if(!_started){
+        webusb_enabled = enabled;
+    }
+    return !_started;
+}
+bool ESPUSB::webUSB(void){
+    return webusb_enabled;
+}
+
+bool ESPUSB::productName(const char * name){
+    if(!_started){
+        product_name = name;
+    }
+    return !_started;
+}
+const char * ESPUSB::productName(void){
+    return product_name.c_str();
+}
+
+bool ESPUSB::manufacturerName(const char * name){
+    if(!_started){
+        manufacturer_name = name;
+    }
+    return !_started;
+}
+const char * ESPUSB::manufacturerName(void){
+    return manufacturer_name.c_str();
+}
+
+bool ESPUSB::serialNumber(const char * name){
+    if(!_started){
+        serial_number = name;
+    }
+    return !_started;
+}
+const char * ESPUSB::serialNumber(void){
+    return serial_number.c_str();
+}
+
+bool ESPUSB::webUSBURL(const char * name){
+    if(!_started){
+        webusb_url = name;
+    }
+    return !_started;
+}
+const char * ESPUSB::webUSBURL(void){
+    return webusb_url.c_str();
+}
+
+ESPUSB USB;
+
+#endif /* CONFIG_USB_ENABLED */

cores/esp32/USB.h

@@ -0,0 +1,118 @@
+// 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_USB_ENABLED
+
+#include "Arduino.h"
+#include "USBCDC.h"
+
+#include "esp_event.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_USB_EVENTS);
+
+typedef enum {
+    ARDUINO_USB_ANY_EVENT = ESP_EVENT_ANY_ID,
+    ARDUINO_USB_STARTED_EVENT = 0,
+    ARDUINO_USB_STOPPED_EVENT,
+    ARDUINO_USB_SUSPEND_EVENT,
+    ARDUINO_USB_RESUME_EVENT,
+    ARDUINO_USB_MAX_EVENT,
+} arduino_usb_event_t;
+
+typedef union {
+    struct {
+        bool remote_wakeup_en;
+    } suspend;
+} arduino_usb_event_data_t;
+
+class ESPUSB {
+    public:
+        ESPUSB(size_t event_task_stack_size=2048, uint8_t event_task_priority=5);
+        ~ESPUSB();
+        
+        void onEvent(esp_event_handler_t callback);
+        void onEvent(arduino_usb_event_t event, esp_event_handler_t callback);
+        
+        bool VID(uint16_t v);
+        uint16_t VID(void);
+
+        bool PID(uint16_t p);
+        uint16_t PID(void);
+
+        bool firmwareVersion(uint16_t version);
+        uint16_t firmwareVersion(void);
+
+        bool usbVersion(uint16_t version);
+        uint16_t usbVersion(void);
+
+        bool usbPower(uint16_t mA);
+        uint16_t usbPower(void);
+
+        bool usbClass(uint8_t _class);
+        uint8_t usbClass(void);
+
+        bool usbSubClass(uint8_t subClass);
+        uint8_t usbSubClass(void);
+
+        bool usbProtocol(uint8_t protocol);
+        uint8_t usbProtocol(void);
+
+        bool usbAttributes(uint8_t attr);
+        uint8_t usbAttributes(void);
+
+        bool webUSB(bool enabled);
+        bool webUSB(void);
+        
+        bool productName(const char * name);
+        const char * productName(void);
+
+        bool manufacturerName(const char * name);
+        const char * manufacturerName(void);
+
+        bool serialNumber(const char * name);
+        const char * serialNumber(void);
+
+        bool webUSBURL(const char * name);
+        const char * webUSBURL(void);
+
+        bool enableDFU();
+        bool begin();
+        operator bool() const;
+        
+    private:
+        uint16_t vid;
+        uint16_t pid;
+        String product_name;
+        String manufacturer_name;
+        String serial_number;
+        uint16_t fw_version;
+        uint16_t usb_version;
+        uint8_t usb_class;
+        uint8_t usb_subclass;
+        uint8_t usb_protocol;
+        uint8_t usb_attributes;
+        uint16_t usb_power_ma;
+        bool webusb_enabled;
+        String webusb_url;
+        
+        bool _started;
+        size_t _task_stack_size;
+        uint8_t _event_task_priority;
+};
+
+extern ESPUSB USB;
+
+#endif /* CONFIG_USB_ENABLED */

cores/esp32/USBCDC.cpp

@@ -0,0 +1,338 @@
+// 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 "esp32-hal.h"
+#include "esp32-hal-tinyusb.h"
+#include "USB.h"
+#include "USBCDC.h"
+#if CONFIG_USB_ENABLED
+
+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)
+    };
+    *itf+=2;
+    memcpy(dst, descriptor, TUD_CDC_DESC_LEN);
+    return TUD_CDC_DESC_LEN;
+}
+
+void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
+{
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onLineState(dtr, rts);
+    }
+}
+
+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){
+        devices[itf]->_onLineCoding(p_line_coding->bit_rate, p_line_coding->stop_bits, p_line_coding->parity, p_line_coding->data_bits);
+    }
+}
+
+void tud_cdc_rx_cb(uint8_t itf)
+{
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onRX();
+    }
+}
+
+
+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){
+            delay(1);
+            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;
+}
+
+static void ARDUINO_ISR_ATTR cdc0_write_char(char c)
+{
+    tinyusb_cdc_write(0, (const uint8_t *)&c, 1);
+}
+
+//void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char);
+
+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) {
+    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);
+    }
+}
+
+void USBCDC::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_USB_CDC_ANY_EVENT, callback);
+}
+void USBCDC::onEvent(arduino_usb_cdc_event_t event, esp_event_handler_t callback){
+    arduino_usb_event_handler_register_with(ARDUINO_USB_CDC_EVENTS, event, callback, this);
+}
+
+size_t USBCDC::setRxBufferSize(size_t rx_queue_len){
+    if(rx_queue){
+        return 0;
+    }
+    rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));
+    if(!rx_queue){
+        return 0;
+    }
+    return rx_queue_len;
+}
+
+void USBCDC::begin(unsigned long baud)
+{
+    setRxBufferSize(256);//default if not preset
+}
+
+void USBCDC::end()
+{
+}
+
+void USBCDC::_onUnplugged(void){
+    if(connected){
+        connected = false;
+        dtr = false;
+        rts = false;
+        arduino_usb_cdc_event_data_t p = {0};
+        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+    }
+}
+
+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;
+    dtr = _dtr;
+    rts = _rts;
+
+    if(reboot_enable){
+        if(!dtr && rts){
+            if(lineState == CDC_LINE_IDLE){
+                lineState++;
+            } else {
+                lineState = CDC_LINE_IDLE;
+            }
+        } else if(dtr && rts){
+            if(lineState == CDC_LINE_1){
+                lineState++;
+            } else {
+                lineState = CDC_LINE_IDLE;
+            }
+        } else if(dtr && !rts){
+            if(lineState == CDC_LINE_2){
+                lineState++;
+            } else {
+                lineState = CDC_LINE_IDLE;
+            }
+        } else if(!dtr && !rts){
+            if(lineState == CDC_LINE_3){
+                usb_persist_restart(RESTART_BOOTLOADER);
+            } else {
+                lineState = CDC_LINE_IDLE;
+            }
+        }
+    }
+    
+    if(lineState == CDC_LINE_IDLE){
+        if(dtr && rts && !connected){
+            connected = true;
+            arduino_usb_cdc_event_data_t p = {0};
+            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){
+            connected = false;
+            arduino_usb_cdc_event_data_t p = {0};
+            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};
+        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);
+    }
+
+}
+
+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);
+    }
+}
+
+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);
+    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};
+    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::enableReboot(bool enable){
+    reboot_enable = enable;
+}
+bool  USBCDC::rebootEnabled(void){
+    return reboot_enable;
+}
+
+int USBCDC::available(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL){
+        return -1;
+    }
+    return uxQueueMessagesWaiting(rx_queue);
+}
+
+int USBCDC::peek(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c;
+    if(xQueuePeek(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+int USBCDC::read(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c = 0;
+    if(xQueueReceive(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+size_t USBCDC::read(uint8_t *buffer, size_t size)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || 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;
+}
+
+void USBCDC::flush(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES){
+        return;
+    }
+    tud_cdc_n_write_flush(itf);
+}
+
+int USBCDC::availableForWrite(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES){
+        return -1;
+    }
+    return tud_cdc_n_write_available(itf);
+}
+
+size_t USBCDC::write(const uint8_t *buffer, size_t size)
+{
+    return tinyusb_cdc_write(itf, buffer, size);
+}
+
+size_t USBCDC::write(uint8_t c)
+{
+    return write(&c, 1);
+}
+
+uint32_t  USBCDC::baudRate()
+{
+    return bit_rate;
+}
+
+void USBCDC::setDebugOutput(bool en)
+{
+    if(en) {
+        uartSetDebug(NULL);
+        ets_install_putc1((void (*)(char)) &cdc0_write_char);
+    } else {
+        ets_install_putc1(NULL);
+    }
+}
+
+USBCDC::operator bool() const
+{
+    if(itf >= MAX_USB_CDC_DEVICES){
+        return false;
+    }
+    return connected;
+}
+
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+USBCDC Serial(0);
+#endif
+
+#endif /* CONFIG_USB_CDC_ENABLED */
+
+#endif /* CONFIG_USB_ENABLED */

cores/esp32/USBCDC.h

@@ -0,0 +1,133 @@
+// 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 <inttypes.h>
+
+#include "Stream.h"
+#include "esp32-hal.h"
+#if CONFIG_USB_CDC_ENABLED
+
+#include "esp_event.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_USB_CDC_EVENTS);
+
+typedef enum {
+    ARDUINO_USB_CDC_ANY_EVENT = ESP_EVENT_ANY_ID,
+    ARDUINO_USB_CDC_CONNECTED_EVENT = 0,
+    ARDUINO_USB_CDC_DISCONNECTED_EVENT,
+    ARDUINO_USB_CDC_LINE_STATE_EVENT,
+    ARDUINO_USB_CDC_LINE_CODING_EVENT,
+    ARDUINO_USB_CDC_RX_EVENT,
+    ARDUINO_USB_CDC_MAX_EVENT,
+} arduino_usb_cdc_event_t;
+
+typedef union {
+    struct {
+            bool dtr;
+            bool rts;
+    } line_state;
+    struct {
+            uint32_t bit_rate;
+            uint8_t  stop_bits; ///< 0: 1 stop bit - 1: 1.5 stop bits - 2: 2 stop bits
+            uint8_t  parity;    ///< 0: None - 1: Odd - 2: Even - 3: Mark - 4: Space
+            uint8_t  data_bits; ///< can be 5, 6, 7, 8 or 16
+    } line_coding;
+    struct {
+            size_t len;
+    } rx;
+} arduino_usb_cdc_event_data_t;
+
+class USBCDC: public Stream
+{
+public:
+    USBCDC(uint8_t itf=0);
+
+    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);
+    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);
+    }
+    uint32_t baudRate();
+    void setDebugOutput(bool);
+    operator bool() const;
+
+    void enableReboot(bool enable);
+    bool rebootEnabled(void);
+
+    //internal methods
+    void _onDFU(void);
+    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 _onUnplugged(void);
+    
+protected:
+    uint8_t  itf;
+    uint32_t bit_rate;
+    uint8_t  stop_bits; ///< 0: 1 stop bit - 1: 1.5 stop bits - 2: 2 stop bits
+    uint8_t  parity;    ///< 0: None - 1: Odd - 2: Even - 3: Mark - 4: Space
+    uint8_t  data_bits; ///< can be 5, 6, 7, 8 or 16
+    bool     dtr;
+    bool     rts;
+    bool     connected;
+    bool     reboot_enable;
+    xQueueHandle rx_queue;
+    
+};
+
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+extern USBCDC Serial;
+#endif
+
+#endif /* CONFIG_USB_CDC_ENABLED */

cores/esp32/WMath.cpp

@@ -65,9 +65,12 @@ long random(long howsmall, long howbig)
     return random(diff) + howsmall;
 }
 
-long map(long x, long in_min, long in_max, long out_min, long out_max)
+long map(long x, long in_min, long in_max, long out_min, long out_max) {
-{
+    long divisor = (in_max - in_min);
-    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+    if(divisor == 0){
+        return -1; //AVR returns -1, SAM returns 0
+    }
+    return (x - in_min) * (out_max - out_min) / divisor + out_min;
 }
 
 unsigned int makeWord(unsigned int w)

cores/esp32/WString.h

@@ -27,6 +27,7 @@
 #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.
@@ -35,295 +36,327 @@ class StringSumHelper;
 // an abstract class used as a means to proide a unique pointer type
 // but really has no body
 class __FlashStringHelper;
-#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
+#define FPSTR(pstr_pointer) (reinterpret_cast<const __FlashStringHelper *>(pstr_pointer))
+#define F(string_literal) (FPSTR(PSTR(string_literal)))
 
 // The string class
-class String
+class String {
-{
+        // use a function pointer to allow for "if (s)" without the
-    // use a function pointer to allow for "if (s)" without the
+        // complications of an operator bool(). for more information, see:
-    // complications of an operator bool(). for more information, see:
+        // http://www.artima.com/cppsource/safebool.html
-    // http://www.artima.com/cppsource/safebool.html
+        typedef void (String::*StringIfHelperType)() const;
-    typedef void (String::*StringIfHelperType)() const;
+        void StringIfHelper() 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 String &str);
-    String(const __FlashStringHelper *str) : String(reinterpret_cast<const char *>(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;
         }
-    }
 
-    // creates a copy of the assigned value.  if the value is null or
+    public:
-    // invalid, or if the memory allocation fails, the string will be
+        // constructors
-    // marked as invalid ("if (s)" will be false).
+        // creates a copy of the initial value.
-    String & operator =(const String &rhs);
+        // if the initial value is null or invalid, or if memory allocation
-    String & operator =(const char *cstr);
+        // fails, the string will be marked as invalid (i.e. "if (s)" will
-    String & operator = (const __FlashStringHelper *str);
+        // be false).
+        String(const char *cstr = "");
+        String(const String &str);
+        String(const __FlashStringHelper *str);
 #ifdef __GXX_EXPERIMENTAL_CXX0X__
-    String & operator =(String &&rval);
+        String(String &&rval);
-    String & operator =(StringSumHelper &&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)
+        // concatenate (works w/ built-in types)
 
-    // returns true on success, false on failure (in which case, the string
+        // returns true on success, false on failure (in which case, the string
-    // is left unchanged).  if the argument is null or invalid, the
+        // is left unchanged).  if the argument is null or invalid, the
-    // concatenation is considered unsucessful.
+        // concatenation is considered unsuccessful.
-    unsigned char concat(const String &str);
+        unsigned char concat(const String &str);
-    unsigned char concat(const char *cstr);
+        unsigned char concat(const char *cstr);
-    unsigned char concat(char c);
+        unsigned char concat(char c);
-    unsigned char concat(unsigned char c);
+        unsigned char concat(unsigned char c);
-    unsigned char concat(int num);
+        unsigned char concat(int num);
-    unsigned char concat(unsigned int num);
+        unsigned char concat(unsigned int num);
-    unsigned char concat(long num);
+        unsigned char concat(long num);
-    unsigned char concat(unsigned long num);
+        unsigned char concat(unsigned long num);
-    unsigned char concat(float num);
+        unsigned char concat(float num);
-    unsigned char concat(double num);
+        unsigned char concat(double num);
-    unsigned char concat(const __FlashStringHelper * str);
+        unsigned char concat(const __FlashStringHelper * str);
 
-    // if there's not enough memory for the concatenated value, the string
+        // if there's not enough memory for the concatenated value, the string
-    // will be left unchanged (but this isn't signalled in any way)
+        // will be left unchanged (but this isn't signalled in any way)
-    String & operator +=(const String &rhs)
+        String & operator +=(const String &rhs) {
-    {
+            concat(rhs);
-        concat(rhs);
+            return (*this);
-        return (*this);
+        }
-    }
+        String & operator +=(const char *cstr) {
-    String & operator +=(const char *cstr)
+            concat(cstr);
-    {
+            return (*this);
-        concat(cstr);
+        }
-        return (*this);
+        String & operator +=(char c) {
-    }
+            concat(c);
-    String & operator +=(char c)
+            return (*this);
-    {
+        }
-        concat(c);
+        String & operator +=(unsigned char num) {
-        return (*this);
+            concat(num);
-    }
+            return (*this);
-    String & operator +=(unsigned char num)
+        }
-    {
+        String & operator +=(int num) {
-        concat(num);
+            concat(num);
-        return (*this);
+            return (*this);
-    }
+        }
-    String & operator +=(int num)
+        String & operator +=(unsigned int num) {
-    {
+            concat(num);
-        concat(num);
+            return (*this);
-        return (*this);
+        }
-    }
+        String & operator +=(long num) {
-    String & operator +=(unsigned int num)
+            concat(num);
-    {
+            return (*this);
-        concat(num);
+        }
-        return (*this);
+        String & operator +=(unsigned long num) {
-    }
+            concat(num);
-    String & operator +=(long num)
+            return (*this);
-    {
+        }
-        concat(num);
+        String & operator +=(float num) {
-        return (*this);
+            concat(num);
-    }
+            return (*this);
-    String & operator +=(unsigned long num)
+        }
-    {
+        String & operator +=(double num) {
-        concat(num);
+            concat(num);
-        return (*this);
+            return (*this);
-    }
+        }
-    String & operator +=(float num)
+        String & operator += (const __FlashStringHelper *str){
-    {
+            concat(str);
-        concat(num);
+            return (*this);
-        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 String &rhs);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, char c);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, char c);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, int num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, int num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned 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, long num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned 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, float num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, double num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, double num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
 
-    // comparison (only works w/ Strings and "strings")
+        // comparison (only works w/ Strings and "strings")
-    operator StringIfHelperType() const
+        operator StringIfHelperType() const {
-    {
+            return buffer() ? &String::StringIfHelper : 0;
-        return buffer ? &String::StringIfHelper : 0;
+        }
-    }
+        int compareTo(const String &s) const;
-    int compareTo(const String &s) const;
+        unsigned char equals(const String &s) const;
-    unsigned char equals(const String &s) const;
+        unsigned char equals(const char *cstr) const;
-    unsigned char equals(const char *cstr) const;
+        unsigned char operator ==(const String &rhs) const {
-    unsigned char operator ==(const String &rhs) const
+            return equals(rhs);
-    {
+        }
-        return equals(rhs);
+        unsigned char operator ==(const char *cstr) const {
-    }
+            return equals(cstr);
-    unsigned char operator ==(const char *cstr) const
+        }
-    {
+        unsigned char operator !=(const String &rhs) const {
-        return equals(cstr);
+            return !equals(rhs);
-    }
+        }
-    unsigned char operator !=(const String &rhs) const
+        unsigned char operator !=(const char *cstr) const {
-    {
+            return !equals(cstr);
-        return !equals(rhs);
+        }
-    }
+        unsigned char operator <(const String &rhs) const;
-    unsigned char operator !=(const char *cstr) const
+        unsigned char operator >(const String &rhs) const;
-    {
+        unsigned char operator <=(const String &rhs) const;
-        return !equals(cstr);
+        unsigned char operator >=(const String &rhs) const;
-    }
+        unsigned char equalsIgnoreCase(const String &s) const;
-    unsigned char operator <(const String &rhs) const;
+        unsigned char equalsConstantTime(const String &s) const;
-    unsigned char operator >(const String &rhs) const;
+        unsigned char startsWith(const String &prefix) const;
-    unsigned char operator <=(const String &rhs) const;
+        unsigned char startsWith(const char *prefix) const {
-    unsigned char operator >=(const String &rhs) const;
+            return this->startsWith(String(prefix));
-    unsigned char equalsIgnoreCase(const String &s) const;
+        }
-    unsigned char equalsConstantTime(const String &s) const;
+        unsigned char startsWith(const __FlashStringHelper *prefix) const {
-    unsigned char startsWith(const String &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 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 acccess
+        // character access
-    char charAt(unsigned int index) const;
+        char charAt(unsigned int index) const;
-    void setCharAt(unsigned int index, char c);
+        void setCharAt(unsigned int index, char c);
-    char operator [](unsigned int index) const;
+        char operator [](unsigned int index) const;
-    char& operator [](unsigned int index);
+        char& operator [](unsigned int index);
-    void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index = 0) const;
+        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
+        void toCharArray(char *buf, unsigned int bufsize, unsigned int index = 0) const {
-    {
+            getBytes((unsigned char *) buf, bufsize, index);
-        getBytes((unsigned char *) buf, bufsize, index);
+        }
-    }
+        const char* c_str() const { return buffer(); }
-    const char * c_str() const
+        char* begin() { return wbuffer(); }
-    {
+        char* end() { return wbuffer() + length(); }
-        return buffer;
+        const char* begin() const { return c_str(); }
-    }
+        const char* end() const { return c_str() + length(); }
 
-    // search
+        // search
-    int indexOf(char ch) const;
+        int indexOf(char ch) const;
-    int indexOf(char ch, unsigned int fromIndex) const;
+        int indexOf(char ch, unsigned int fromIndex) const;
-    int indexOf(const String &str) const;
+        int indexOf(const String &str) const;
-    int indexOf(const String &str, unsigned int fromIndex) const;
+        int indexOf(const String &str, unsigned int fromIndex) const;
-    int lastIndexOf(char ch) const;
+        int lastIndexOf(char ch) const;
-    int lastIndexOf(char ch, unsigned int fromIndex) const;
+        int lastIndexOf(char ch, unsigned int fromIndex) const;
-    int lastIndexOf(const String &str) const;
+        int lastIndexOf(const String &str) const;
-    int lastIndexOf(const String &str, unsigned int fromIndex) const;
+        int lastIndexOf(const String &str, unsigned int fromIndex) const;
-    String substring(unsigned int beginIndex) const
+        String substring(unsigned int beginIndex) const {
-    {
+            return substring(beginIndex, len());
-        return substring(beginIndex, len);
+        }
-    }
+        ;
-    ;
+        String substring(unsigned int beginIndex, unsigned int endIndex) const;
-    String substring(unsigned int beginIndex, unsigned int endIndex) const;
 
-    // modification
+        // modification
-    void replace(char find, char replace);
+        void replace(char find, char replace);
-    void replace(const String& find, const String& replace);
+        void replace(const String &find, const String &replace);
-    void remove(unsigned int index);
+        void replace(const char *find, const String &replace) {
-    void remove(unsigned int index, unsigned int count);
+            this->replace(String(find), replace);
-    void toLowerCase(void);
+        }
-    void toUpperCase(void);
+        void replace(const __FlashStringHelper *find, const String &replace) {
-    void trim(void);
+            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
+        // parsing/conversion
-    long toInt(void) const;
+        long toInt(void) const;
-    float toFloat(void) const;
+        float toFloat(void) const;
-    double toDouble(void) const;
+	double toDouble(void) const;
 
-protected:
+    protected:
-    char *buffer;	        // the actual char array
+        // Contains the string info when we're not in SSO mode
-    unsigned int capacity;  // the array length minus one (for the '\0')
+        struct _ptr { 
-    unsigned int len;       // the String length (not counting the '\0')
+            char *   buff;
-protected:
+            uint16_t cap;
-    void init(void);
+            uint16_t len;
-    void invalidate(void);
+        };
-    unsigned char changeBuffer(unsigned int maxStrLen);
+        // This allows strings up up to 11 (10 + \0 termination) without any extra space.
-    unsigned char concat(const char *cstr, unsigned int length);
+        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
+        enum { CAPACITY_MAX = 65535 }; // If typeof(cap) changed from uint16_t, be sure to update this enum to the max value storable in the type
+        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; else ptr.len = len; }
+        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
 
-    // copy and move
+    protected:
-    String & copy(const char *cstr, unsigned int length);
+        void init(void);
-    String & copy(const __FlashStringHelper *pstr, unsigned int length);
+        void invalidate(void);
+        unsigned char changeBuffer(unsigned int maxStrLen);
+        unsigned char concat(const char *cstr, unsigned int length);
+
+        // 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);
+        void move(String &rhs);
 #endif
 };
 
-class StringSumHelper: public String
+class StringSumHelper: public String {
-{
+    public:
-public:
+        StringSumHelper(const String &s) :
-    StringSumHelper(const String &s) :
+                String(s) {
-        String(s)
+        }
-    {
+        StringSumHelper(const char *p) :
-    }
+                String(p) {
-    StringSumHelper(const char *p) :
+        }
-        String(p)
+        StringSumHelper(char c) :
-    {
+                String(c) {
-    }
+        }
-    StringSumHelper(char c) :
+        StringSumHelper(unsigned char num) :
-        String(c)
+                String(num) {
-    {
+        }
-    }
+        StringSumHelper(int num) :
-    StringSumHelper(unsigned char num) :
+                String(num) {
-        String(num)
+        }
-    {
+        StringSumHelper(unsigned int num) :
-    }
+                String(num) {
-    StringSumHelper(int num) :
+        }
-        String(num)
+        StringSumHelper(long num) :
-    {
+                String(num) {
-    }
+        }
-    StringSumHelper(unsigned int num) :
+        StringSumHelper(unsigned long num) :
-        String(num)
+                String(num) {
-    {
+        }
-    }
+        StringSumHelper(float num) :
-    StringSumHelper(long num) :
+                String(num) {
-        String(num)
+        }
-    {
+        StringSumHelper(double 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/base64.cpp

@@ -31,11 +31,11 @@ extern "C" {
 
 /**
  * convert input data to base64
- * @param data uint8_t *
+ * @param data const uint8_t *
  * @param length size_t
  * @return String
  */
-String base64::encode(uint8_t * data, size_t length)
+String base64::encode(const uint8_t * data, size_t length)
 {
     size_t size = base64_encode_expected_len(length) + 1;
     char * buffer = (char *) malloc(size);
@@ -54,10 +54,10 @@ String base64::encode(uint8_t * data, size_t length)
 
 /**
  * convert input data to base64
- * @param text String
+ * @param text const String&
  * @return String
  */
-String base64::encode(String text)
+String base64::encode(const String& text)
 {
     return base64::encode((uint8_t *) text.c_str(), text.length());
 }

cores/esp32/base64.h

@@ -4,8 +4,8 @@
 class base64
 {
 public:
-    static String encode(uint8_t * data, size_t length);
+    static String encode(const uint8_t * data, size_t length);
-    static String encode(String text);
+    static String encode(const String& text);
 private:
 };
 

cores/esp32/esp32-hal-adc.c

@@ -15,103 +15,72 @@
 #include "esp32-hal-adc.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.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 "esp32/rom/ets_sys.h"
+#include "esp_intr_alloc.h"
+#define DEFAULT_VREF    1100
+static esp_adc_cal_characteristics_t *__analogCharacteristics[2] = {NULL, NULL};
+static uint16_t __analogVRef = 0;
+static uint8_t __analogVRefPin = 0;
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/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
+
 static uint8_t __analogAttenuation = 3;//11db
 static uint8_t __analogWidth = 3;//12 bits
-static uint8_t __analogCycles = 8;
-static uint8_t __analogSamples = 0;//1 sample
 static uint8_t __analogClockDiv = 1;
 
-// Width of returned answer ()
+void __analogSetClockDiv(uint8_t clockDiv){
-static uint8_t __analogReturnedWidth = 12;
+    if(!clockDiv){
+        clockDiv = 1;
+    }
+    __analogClockDiv = clockDiv;
+    adc_set_clk_div(__analogClockDiv);
+}
 
+void __analogSetAttenuation(adc_attenuation_t attenuation)
+{
+    __analogAttenuation = attenuation & 3;
+}
+
+#if CONFIG_IDF_TARGET_ESP32
 void __analogSetWidth(uint8_t bits){
     if(bits < 9){
         bits = 9;
     } else if(bits > 12){
         bits = 12;
     }
-    __analogReturnedWidth = bits;
     __analogWidth = bits - 9;
-    SET_PERI_REG_BITS(SENS_SAR_START_FORCE_REG, SENS_SAR1_BIT_WIDTH, __analogWidth, SENS_SAR1_BIT_WIDTH_S);
+    adc1_config_width(__analogWidth);
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL_REG, SENS_SAR1_SAMPLE_BIT, __analogWidth, SENS_SAR1_SAMPLE_BIT_S);
-
-    SET_PERI_REG_BITS(SENS_SAR_START_FORCE_REG, SENS_SAR2_BIT_WIDTH, __analogWidth, SENS_SAR2_BIT_WIDTH_S);
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_SAMPLE_BIT, __analogWidth, SENS_SAR2_SAMPLE_BIT_S);
 }
+#endif
 
-void __analogSetCycles(uint8_t cycles){
+void __analogInit(){
-    __analogCycles = cycles;
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL_REG, SENS_SAR1_SAMPLE_CYCLE, __analogCycles, SENS_SAR1_SAMPLE_CYCLE_S);
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_SAMPLE_CYCLE, __analogCycles, SENS_SAR2_SAMPLE_CYCLE_S);
-}
-
-void __analogSetSamples(uint8_t samples){
-    if(!samples){
-        return;
-    }
-    __analogSamples = samples - 1;
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL_REG, SENS_SAR1_SAMPLE_NUM, __analogSamples, SENS_SAR1_SAMPLE_NUM_S);
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_SAMPLE_NUM, __analogSamples, SENS_SAR2_SAMPLE_NUM_S);
-}
-
-void __analogSetClockDiv(uint8_t clockDiv){
-    if(!clockDiv){
-        return;
-    }
-    __analogClockDiv = clockDiv;
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL_REG, SENS_SAR1_CLK_DIV, __analogClockDiv, SENS_SAR1_CLK_DIV_S);
-    SET_PERI_REG_BITS(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_CLK_DIV, __analogClockDiv, SENS_SAR2_CLK_DIV_S);
-}
-
-void __analogSetAttenuation(adc_attenuation_t attenuation)
-{
-    __analogAttenuation = attenuation & 3;
-    uint32_t att_data = 0;
-    int i = 10;
-    while(i--){
-        att_data |= __analogAttenuation << (i * 2);
-    }
-    WRITE_PERI_REG(SENS_SAR_ATTEN1_REG, att_data & 0xFFFF);//ADC1 has 8 channels
-    WRITE_PERI_REG(SENS_SAR_ATTEN2_REG, att_data);
-}
-
-void IRAM_ATTR __analogInit(){
     static bool initialized = false;
     if(initialized){
         return;
     }
-
-    __analogSetAttenuation(__analogAttenuation);
-    __analogSetCycles(__analogCycles);
-    __analogSetSamples(__analogSamples + 1);//in samples
-    __analogSetClockDiv(__analogClockDiv);
-    __analogSetWidth(__analogWidth + 9);//in bits
-
-    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DATA_INV);
-    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DATA_INV);
-
-    SET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_FORCE_M); //SAR ADC1 controller (in RTC) is started by SW
-    SET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_SAR1_EN_PAD_FORCE_M); //SAR ADC1 pad enable bitmap is controlled by SW
-    SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_FORCE_M); //SAR ADC2 controller (in RTC) is started by SW
-    SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD_FORCE_M); //SAR ADC2 pad enable bitmap is controlled by SW
-
-    CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR_M); //force XPD_SAR=0, use XPD_FSM
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_AMP, 0x2, SENS_FORCE_XPD_AMP_S); //force XPD_AMP=0
-
-    CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_CTRL_REG, 0xfff << SENS_AMP_RST_FB_FSM_S);  //clear FSM
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT1, 0x1, SENS_SAR_AMP_WAIT1_S);
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT2, 0x1, SENS_SAR_AMP_WAIT2_S);
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_SAR_AMP_WAIT3, 0x1, SENS_SAR_AMP_WAIT3_S);
-    while (GET_PERI_REG_BITS2(SENS_SAR_SLAVE_ADDR1_REG, 0x7, SENS_MEAS_STATUS_S) != 0); //wait det_fsm==
-
     initialized = true;
+    __analogSetClockDiv(__analogClockDiv);
+#if CONFIG_IDF_TARGET_ESP32
+    __analogSetWidth(__analogWidth + 9);//in bits
+#endif
 }
 
 void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
@@ -120,23 +89,23 @@ void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
     if(channel < 0 || attenuation > 3){
         return ;
     }
-    __analogInit();
+    if(channel > 9){
-    if(channel > 7){
+        adc2_config_channel_atten(channel - 10, attenuation);
-        SET_PERI_REG_BITS(SENS_SAR_ATTEN2_REG, 3, attenuation, ((channel - 10) * 2));
     } else {
-        SET_PERI_REG_BITS(SENS_SAR_ATTEN1_REG, 3, attenuation, (channel * 2));
+        adc1_config_channel_atten(channel, attenuation);
     }
+    __analogInit();
 }
 
-bool IRAM_ATTR __adcAttachPin(uint8_t pin){
+bool __adcAttachPin(uint8_t pin){
-
     int8_t channel = digitalPinToAnalogChannel(pin);
     if(channel < 0){
-        return false;//not adc pin
+        log_e("Pin %u is not ADC pin!", pin);
+        return false;
     }
-
     int8_t pad = digitalPinToTouchChannel(pin);
     if(pad >= 0){
+#if CONFIG_IDF_TARGET_ESP32
         uint32_t touch = READ_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG);
         if(touch & (1 << pad)){
             touch &= ~((1 << (pad + SENS_TOUCH_PAD_OUTEN2_S))
@@ -144,6 +113,7 @@ bool IRAM_ATTR __adcAttachPin(uint8_t pin){
                     | (1 << (pad + SENS_TOUCH_PAD_WORKEN_S)));
             WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG, touch);
         }
+#endif
     } 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){
@@ -151,86 +121,120 @@ bool IRAM_ATTR __adcAttachPin(uint8_t pin){
     }
 
     pinMode(pin, ANALOG);
-
+    __analogSetPinAttenuation(pin, __analogAttenuation);
-    __analogInit();
     return true;
 }
 
-bool IRAM_ATTR __adcStart(uint8_t pin){
-
-    int8_t channel = digitalPinToAnalogChannel(pin);
-    if(channel < 0){
-        return false;//not adc pin
-    }
-
-    if(channel > 9){
-        channel -= 10;
-        CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
-        SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, (1 << channel), SENS_SAR2_EN_PAD_S);
-        SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
-    } else {
-        CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_SAR_M);
-        SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, SENS_SAR1_EN_PAD, (1 << channel), SENS_SAR1_EN_PAD_S);
-        SET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_SAR_M);
-    }
-    return true;
-}
-
-bool IRAM_ATTR __adcBusy(uint8_t pin){
-
-    int8_t channel = digitalPinToAnalogChannel(pin);
-    if(channel < 0){
-        return false;//not adc pin
-    }
-
-    if(channel > 7){
-        return (GET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_DONE_SAR) == 0);
-    }
-    return (GET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_DONE_SAR) == 0);
-}
-
-uint16_t IRAM_ATTR __adcEnd(uint8_t pin)
-{
-
-    uint16_t value = 0;
-    int8_t channel = digitalPinToAnalogChannel(pin);
-    if(channel < 0){
-        return 0;//not adc pin
-    }
-    if(channel > 7){
-        while (GET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_DONE_SAR) == 0); //wait for conversion
-        value = GET_PERI_REG_BITS2(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_DATA_SAR, SENS_MEAS2_DATA_SAR_S);
-    } else {
-        while (GET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_DONE_SAR) == 0); //wait for conversion
-        value = GET_PERI_REG_BITS2(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_DATA_SAR, SENS_MEAS1_DATA_SAR_S);
-    }
-
-    // Shift result if necessary
-    uint8_t from = __analogWidth + 9;
-    if (from == __analogReturnedWidth) {
-        return value;
-    }
-    if (from > __analogReturnedWidth) {
-        return value >> (from - __analogReturnedWidth);
-    }
-    return value << (__analogReturnedWidth - from);
-}
-
-uint16_t IRAM_ATTR __analogRead(uint8_t pin)
-{
-    if(!__adcAttachPin(pin) || !__adcStart(pin)){
-        return 0;
-    }
-    return __adcEnd(pin);
-}
-
 void __analogReadResolution(uint8_t bits)
 {
     if(!bits || bits > 16){
         return;
     }
+#if CONFIG_IDF_TARGET_ESP32
     __analogSetWidth(bits);         // hadware from 9 to 12
-    __analogReturnedWidth = bits;   // software from 1 to 16
+#endif
+}
+
+uint16_t __analogRead(uint8_t pin)
+{
+    int8_t channel = digitalPinToAnalogChannel(pin);
+    int value = 0;
+    esp_err_t r = ESP_OK;
+    if(channel < 0){
+        log_e("Pin %u is not ADC pin!", pin);
+        return value;
+    }
+    __adcAttachPin(pin);
+    if(channel > 9){
+        channel -= 10;
+        r = adc2_get_raw( channel, __analogWidth, &value);
+        if ( r == ESP_OK ) {
+            return 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));
+        } else {
+            log_e("GPIO%u: %s", pin, esp_err_to_name(r));
+        }
+    } else {
+        return adc1_get_raw(channel);
+    }
+    return value;
+}
+
+uint32_t __analogReadMilliVolts(uint8_t pin){
+    int8_t channel = digitalPinToAnalogChannel(pin);
+    if(channel < 0){
+        log_e("Pin %u is not ADC pin!", pin);
+        return 0;
+    }
+#if CONFIG_IDF_TARGET_ESP32
+    if(!__analogVRef){
+        if (esp_adc_cal_check_efuse(ESP_ADC_CAL_VAL_EFUSE_TP) == ESP_OK) {
+            log_d("eFuse Two Point: Supported");
+            __analogVRef = DEFAULT_VREF;
+        }
+        if (esp_adc_cal_check_efuse(ESP_ADC_CAL_VAL_EFUSE_VREF) == ESP_OK) {
+            log_d("eFuse Vref: Supported");
+            __analogVRef = DEFAULT_VREF;
+        }
+        if(!__analogVRef){
+            __analogVRef = DEFAULT_VREF;
+            if(__analogVRefPin){
+                esp_adc_cal_characteristics_t chars;
+                if(adc2_vref_to_gpio(__analogVRefPin) == ESP_OK){
+                    __analogVRef = __analogRead(__analogVRefPin);
+                    esp_adc_cal_characterize(1, __analogAttenuation, __analogWidth, DEFAULT_VREF, &chars);
+                    __analogVRef = esp_adc_cal_raw_to_voltage(__analogVRef, &chars);
+                    log_d("Vref to GPIO%u: %u", __analogVRefPin, __analogVRef);
+                }
+            }
+        }
+    }
+    uint8_t unit = 1;
+    if(channel > 9){
+        unit = 2;
+    }
+    uint16_t adc_reading = __analogRead(pin);
+    if(__analogCharacteristics[unit - 1] == NULL){
+        __analogCharacteristics[unit - 1] = calloc(1, sizeof(esp_adc_cal_characteristics_t));
+        if(__analogCharacteristics[unit - 1] == NULL){
+            return 0;
+        }
+        esp_adc_cal_value_t val_type = esp_adc_cal_characterize(unit, __analogAttenuation, __analogWidth, __analogVRef, __analogCharacteristics[unit - 1]);
+        if (val_type == ESP_ADC_CAL_VAL_EFUSE_TP) {
+            log_i("ADC%u: Characterized using Two Point Value: %u\n", unit, __analogCharacteristics[unit - 1]->vref);
+        } else if (val_type == ESP_ADC_CAL_VAL_EFUSE_VREF) {
+            log_i("ADC%u: Characterized using eFuse Vref: %u\n", unit, __analogCharacteristics[unit - 1]->vref);
+        } else if(__analogVRef != DEFAULT_VREF){
+            log_i("ADC%u: Characterized using Vref to GPIO%u: %u\n", unit, __analogVRefPin, __analogCharacteristics[unit - 1]->vref);
+        } else {
+            log_i("ADC%u: Characterized using Default Vref: %u\n", unit, __analogCharacteristics[unit - 1]->vref);
+        }
+    }
+    return esp_adc_cal_raw_to_voltage(adc_reading, __analogCharacteristics[unit - 1]);
+#else
+    uint16_t adc_reading = __analogRead(pin);
+    uint16_t max_reading = 8191;
+    uint16_t max_mv = 1100;
+    switch(__analogAttenuation){
+        case 3: max_mv = 3900; break;
+        case 2: max_mv = 2200; break;
+        case 1: max_mv = 1500; break;
+        default: break;
+    }
+    return (adc_reading * max_mv) / max_reading;
+#endif
+}
+
+#if CONFIG_IDF_TARGET_ESP32
+
+void __analogSetVRefPin(uint8_t pin){
+    if(pin <25 || pin > 27){
+        pin = 0;
+    }
+    __analogVRefPin = pin;
 }
 
 int __hallRead()    //hall sensor without LNA
@@ -256,18 +260,20 @@ int __hallRead()    //hall sensor without LNA
     CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE);
     return (Sens_Vp1 - Sens_Vp0) - (Sens_Vn1 - Sens_Vn0);
 }
+#endif
 
 extern uint16_t analogRead(uint8_t pin) __attribute__ ((weak, alias("__analogRead")));
+extern uint32_t analogReadMilliVolts(uint8_t pin) __attribute__ ((weak, alias("__analogReadMilliVolts")));
 extern void analogReadResolution(uint8_t bits) __attribute__ ((weak, alias("__analogReadResolution")));
-extern void analogSetWidth(uint8_t bits) __attribute__ ((weak, alias("__analogSetWidth")));
-extern void analogSetCycles(uint8_t cycles) __attribute__ ((weak, alias("__analogSetCycles")));
-extern void analogSetSamples(uint8_t samples) __attribute__ ((weak, alias("__analogSetSamples")));
 extern void analogSetClockDiv(uint8_t clockDiv) __attribute__ ((weak, alias("__analogSetClockDiv")));
 extern void analogSetAttenuation(adc_attenuation_t attenuation) __attribute__ ((weak, alias("__analogSetAttenuation")));
 extern void analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation) __attribute__ ((weak, alias("__analogSetPinAttenuation")));
-extern int hallRead() __attribute__ ((weak, alias("__hallRead")));
 
 extern bool adcAttachPin(uint8_t pin) __attribute__ ((weak, alias("__adcAttachPin")));
-extern bool adcStart(uint8_t pin) __attribute__ ((weak, alias("__adcStart")));
+
-extern bool adcBusy(uint8_t pin) __attribute__ ((weak, alias("__adcBusy")));
+#if CONFIG_IDF_TARGET_ESP32
-extern uint16_t adcEnd(uint8_t pin) __attribute__ ((weak, alias("__adcEnd")));
+extern void analogSetVRefPin(uint8_t pin) __attribute__ ((weak, alias("__analogSetVRefPin")));
+extern void analogSetWidth(uint8_t bits) __attribute__ ((weak, alias("__analogSetWidth")));
+extern int hallRead() __attribute__ ((weak, alias("__hallRead")));
+#endif
+

cores/esp32/esp32-hal-adc.h

@@ -38,6 +38,11 @@ typedef enum {
  * */
 uint16_t analogRead(uint8_t pin);
 
+/*
+ * Get MilliVolts value for pin
+ * */
+uint32_t analogReadMilliVolts(uint8_t pin);
+
 /*
  * Set the resolution of analogRead return values. Default is 12 bits (range from 0 to 4096).
  * If between 9 and 12, it will equal the set hardware resolution, else value will be shifted.
@@ -47,31 +52,6 @@ uint16_t analogRead(uint8_t pin);
  */
 void analogReadResolution(uint8_t bits);
 
-/*
- * Sets the sample bits and read resolution
- * Default is 12bit (0 - 4095)
- * Range is 9 - 12
- * */
-void analogSetWidth(uint8_t bits);
-
-/*
- * Set number of cycles per sample
- * Default is 8 and seems to do well
- * Range is 1 - 255
- * */
-void analogSetCycles(uint8_t cycles);
-
-/*
- * Set number of samples in the range.
- * Default is 1
- * Range is 1 - 255
- * This setting splits the range into
- * "samples" pieces, which could look
- * like the sensitivity has been multiplied
- * that many times
- * */
-void analogSetSamples(uint8_t samples);
-
 /*
  * Set the divider for the ADC clock.
  * Default is 1
@@ -91,40 +71,30 @@ void analogSetAttenuation(adc_attenuation_t attenuation);
  * */
 void analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation);
 
-/*
- * Get value for HALL sensor (without LNA)
- * connected to pins 36(SVP) and 39(SVN)
- * */
-int hallRead();
-
-/*
- * Non-Blocking API (almost)
- *
- * Note: ADC conversion can run only for single pin at a time.
- *       That means that if you want to run ADC on two pins on the same bus,
- *       you need to run them one after another. Probably the best use would be
- *       to start conversion on both buses in parallel.
- * */
-
 /*
  * Attach pin to ADC (will also clear any other analog mode that could be on)
  * */
 bool adcAttachPin(uint8_t pin);
 
+#if CONFIG_IDF_TARGET_ESP32
 /*
- * Start ADC conversion on attached pin's bus
+ * Sets the sample bits and read resolution
+ * Default is 12bit (0 - 4095)
+ * Range is 9 - 12
  * */
-bool adcStart(uint8_t pin);
+void analogSetWidth(uint8_t bits);
 
 /*
- * Check if conversion on the pin's ADC bus is currently running
+ * Set pin to use for ADC calibration if the esp is not already calibrated (25, 26 or 27)
  * */
-bool adcBusy(uint8_t pin);
+void analogSetVRefPin(uint8_t pin);
 
 /*
- * Get the result of the conversion (will wait if it have not finished)
+ * Get value for HALL sensor (without LNA)
+ * connected to pins 36(SVP) and 39(SVN)
  * */
-uint16_t adcEnd(uint8_t pin);
+int hallRead();
+#endif
 
 #ifdef __cplusplus
 }

cores/esp32/esp32-hal-bt.c

@@ -65,6 +65,14 @@ bool btStop(){
         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");

cores/esp32/esp32-hal-cpu.c

@@ -21,18 +21,31 @@
 #include "esp_log.h"
 #include "soc/rtc.h"
 #include "soc/rtc_cntl_reg.h"
-#include "rom/rtc.h"
 #include "soc/apb_ctrl_reg.h"
+#include "soc/efuse_reg.h"
 #include "esp32-hal.h"
 #include "esp32-hal-cpu.h"
 
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/rtc.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/rtc.h"
+#endif
+
 typedef struct apb_change_cb_s {
+        struct apb_change_cb_s * prev;
         struct apb_change_cb_s * next;
         void * arg;
         apb_change_cb_t cb;
 } apb_change_t;
 
-const uint32_t MHZ = 1000000;
 
 static apb_change_t * apb_change_callbacks = NULL;
 static xSemaphoreHandle apb_change_lock = NULL;
@@ -52,9 +65,19 @@ static void triggerApbChangeCallback(apb_change_ev_t ev_type, uint32_t old_apb,
     initApbChangeCallback();
     xSemaphoreTake(apb_change_lock, portMAX_DELAY);
     apb_change_t * r = apb_change_callbacks;
-    while(r != NULL){
+    if( r != NULL ){
-        r->cb(r->arg, ev_type, old_apb, new_apb);
+        if(ev_type == APB_BEFORE_CHANGE )
-        r=r->next;
+            while(r != NULL){
+                r->cb(r->arg, ev_type, old_apb, new_apb);
+                r=r->next;
+            }
+        else { // run backwards through chain
+            while(r->next != NULL) r = r->next; // find first added
+            while( r != NULL){
+                r->cb(r->arg, ev_type, old_apb, new_apb);
+                r=r->prev;
+            }
+        }
     }
     xSemaphoreGive(apb_change_lock);
 }
@@ -67,6 +90,7 @@ bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
         return false;
     }
     c->next = NULL;
+    c->prev = NULL;
     c->arg = arg;
     c->cb = cb;
     xSemaphoreTake(apb_change_lock, portMAX_DELAY);
@@ -74,18 +98,20 @@ bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
         apb_change_callbacks = c;
     } else {
         apb_change_t * r = apb_change_callbacks;
-        if(r->cb != cb || r->arg != arg){
+        // look for duplicate callbacks
-            while(r->next){
+        while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
-                r = r->next;
+        if (r) {
-                if(r->cb == cb && r->arg == arg){
+            log_e("duplicate func=%08X arg=%08X",c->cb,c->arg);
-                    free(c);
+            free(c);
-                    goto unlock_and_exit;
+            xSemaphoreGive(apb_change_lock);
-                }
+            return false;
-            }
+        }
-            r->next = c;
+        else {
+            c->next = apb_change_callbacks;
+            apb_change_callbacks-> prev = c;
+            apb_change_callbacks = c;
         }
     }
-unlock_and_exit:
     xSemaphoreGive(apb_change_lock);
     return true;
 }
@@ -94,24 +120,21 @@ bool removeApbChangeCallback(void * arg, apb_change_cb_t cb){
     initApbChangeCallback();
     xSemaphoreTake(apb_change_lock, portMAX_DELAY);
     apb_change_t * r = apb_change_callbacks;
-    if(r == NULL){
+    // 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",cb,arg);
         xSemaphoreGive(apb_change_lock);
         return false;
-    }
+        }
-    if(r->cb == cb && r->arg == arg){
+    else {
-        apb_change_callbacks = r->next;
+        // patch links
+        if(r->prev) r->prev->next = r->next;
+        else { // this is first link
+           apb_change_callbacks = r->next;
+        }
+        if(r->next) r->next->prev = r->prev;
         free(r);
-    } else {
-        while(r->next && (r->next->cb != cb || r->next->arg != arg)){
-            r = r->next;
-        }
-        if(r->next == NULL || r->next->cb != cb || r->next->arg != arg){
-            xSemaphoreGive(apb_change_lock);
-            return false;
-        }
-        apb_change_t * c = r->next;
-        r->next = c->next;
-        free(c);
     }
     xSemaphoreGive(apb_change_lock);
     return true;
@@ -131,6 +154,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
     uint32_t capb, apb;
     //Get XTAL Frequency and calculate min CPU MHz
     rtc_xtal_freq_t xtal = rtc_clk_xtal_freq_get();
+#if CONFIG_IDF_TARGET_ESP32
     if(xtal > RTC_XTAL_FREQ_AUTO){
         if(xtal < RTC_XTAL_FREQ_40M) {
             if(cpu_freq_mhz <= xtal && cpu_freq_mhz != xtal && cpu_freq_mhz != (xtal/2)){
@@ -142,6 +166,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
             return false;
         }
     }
+#endif
     if(cpu_freq_mhz > xtal && cpu_freq_mhz != 240 && cpu_freq_mhz != 160 && cpu_freq_mhz != 80){
         if(xtal >= RTC_XTAL_FREQ_40M){
             log_e("Bad frequency: %u MHz! Options are: 240, 160, 80, %u, %u and %u MHz", cpu_freq_mhz, xtal, xtal/2, xtal/4);
@@ -150,6 +175,17 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
         }
         return false;
     }
+#if CONFIG_IDF_TARGET_ESP32
+    //check if cpu supports the frequency
+    if(cpu_freq_mhz == 240){
+        //Check if ESP32 is rated for a CPU frequency of 160MHz only
+        if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
+            REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
+            log_e("Can not switch to 240 MHz! Chip CPU frequency rated for 160MHz.");
+            cpu_freq_mhz = 160;
+        }
+    }
+#endif
     //Get current CPU clock configuration
     rtc_clk_cpu_freq_get_config(&cconf);
     //return if frequency has not changed
@@ -176,7 +212,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
         //Update REF_TICK (uncomment if REF_TICK is different than 1MHz)
         //if(conf.freq_mhz < 80){
         //    ESP_REG(APB_CTRL_XTAL_TICK_CONF_REG) = conf.freq_mhz / (REF_CLK_FREQ / MHZ) - 1;
-        //}
+        // }
         //Update APB Freq REG
         rtc_clk_apb_freq_update(apb);
         //Update esp_timer divisor

cores/esp32/esp32-hal-dac.c

@@ -12,43 +12,45 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "esp32-hal-dac.h"
+#include "esp32-hal.h"
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.h"
 #include "soc/rtc_io_reg.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"
 
-void IRAM_ATTR __dacWrite(uint8_t pin, uint8_t value)
+#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)
 {
-    if(pin < 25 || pin > 26){
+    if(pin < DAC1 || pin > DAC2){
         return;//not dac pin
     }
     pinMode(pin, ANALOG);
-    uint8_t channel = pin - 25;
+    uint8_t channel = pin - DAC1;
-
+#if CONFIG_IDF_TARGET_ESP32
-
-    //Disable Tone
     CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
-
+#elif CONFIG_IDF_TARGET_ESP32S2
-    if (channel) {
+    SENS.sar_dac_ctrl1.dac_clkgate_en = 1;
-        //Disable Channel Tone
+#endif
-        CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
+    RTCIO.pad_dac[channel].dac_xpd_force = 1;
-        //Set the Dac value
+    RTCIO.pad_dac[channel].xpd_dac = 1;
-        SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, value, RTC_IO_PDAC2_DAC_S);   //dac_output
+    if (channel == 0) {
-        //Channel output enable
+        SENS.sar_dac_ctrl2.dac_cw_en1 = 0;
-        SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
+    } else if (channel == 1) {
-    } else {
+        SENS.sar_dac_ctrl2.dac_cw_en2 = 0;
-        //Disable Channel Tone
-        CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN1_M);
-        //Set the Dac value
-        SET_PERI_REG_BITS(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC, value, RTC_IO_PDAC1_DAC_S);   //dac_output
-        //Channel output enable
-        SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
     }
+    RTCIO.pad_dac[channel].dac = value;
 }
 
 extern void dacWrite(uint8_t pin, uint8_t value) __attribute__ ((weak, alias("__dacWrite")));

cores/esp32/esp32-hal-gpio.c

@@ -13,20 +13,45 @@
 // limitations under the License.
 
 #include "esp32-hal-gpio.h"
+#include "pins_arduino.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.h"
-#include "rom/gpio.h"
 #include "soc/gpio_reg.h"
 #include "soc/io_mux_reg.h"
 #include "soc/gpio_struct.h"
 #include "soc/rtc_io_reg.h"
 
-const int8_t esp32_adc2gpio[20] = {36, 37, 38, 39, 32, 33, 34, 35, -1, -1, 4, 0, 2, 15, 13, 12, 14, 27, 25, 26};
+#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"
+#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"
+#define GPIO_FUNC 1
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/ets_sys.h"
+#include "rom/gpio.h"
+#include "esp_intr.h"
+#endif
 
-const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[GPIO_PIN_COUNT]={
+#if CONFIG_IDF_TARGET_ESP32
+const int8_t esp32_adc2gpio[20] = {36, 37, 38, 39, 32, 33, 34, 35, -1, -1, 4, 0, 2, 15, 13, 12, 14, 27, 25, 26};
+#elif CONFIG_IDF_TARGET_ESP32S2
+const int8_t esp32_adc2gpio[20] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
+#endif
+
+const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[SOC_GPIO_PIN_COUNT]={
+#if CONFIG_IDF_TARGET_ESP32
     {0x44, 11, 11, 1},
     {0x88, -1, -1, -1},
     {0x40, 12, 12, 2},
@@ -59,14 +84,64 @@ const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[GPIO_PIN_COUNT]={
     {0, -1, -1, -1},
     {0, -1, -1, -1},
     {0, -1, -1, -1},
-    {0x1c, 9, 4, 9},
+    {0x1c, 9, 4, 8},
-    {0x20, 8, 5, 8},
+    {0x20, 8, 5, 9},
     {0x14, 4, 6, -1},
     {0x18, 5, 7, -1},
     {0x04, 0, 0, -1},
     {0x08, 1, 1, -1},
     {0x0c, 2, 2, -1},
     {0x10, 3, 3, -1}
+#elif CONFIG_IDF_TARGET_ESP32S2
+    {0x04,  0, -1, -1},
+    {0x08,  1,  0,  1},
+    {0x0c,  2,  1,  2},
+    {0x10,  3,  2,  3},
+    {0x14,  4,  3,  4},
+    {0x18,  5,  4,  5},
+    {0x1c,  6,  5,  6},
+    {0x20,  7,  6,  7},
+    {0x24,  8,  7,  8},
+    {0x28,  9,  8,  9},//FSPI_HD
+    {0x2c, 10,  9, 10},//FSPI_CS0 / FSPI_D4
+    {0x30, 11, 10, 11},//FSPI_D / FSPI_D5
+    {0x34, 12, 11, 12},//FSPI_CLK / FSPI_D6
+    {0x38, 13, 12, 13},//FSPI_Q / FSPI_D7
+    {0x3c, 14, 13, 14},//FSPI_WP / FSPI_DQS
+    {0x40, 15, 14, -1},//32K+ / RTS0
+    {0x44, 16, 15, -1},//32K- / CTS0
+    {0x48, 17, 16, -1},//DAC1 / TXD1
+    {0x4c, 18, 17, -1},//DAC2 / RXD1
+    {0x50, 19, 18, -1},//USB D- / RTS1
+    {0x54, 20, 19, -1},//USB D+ / CTS1
+    {0x58, 21, -1, -1},//SDA?
+    {   0, -1, -1, -1},//UNAVAILABLE
+    {   0, -1, -1, -1},//UNAVAILABLE
+    {   0, -1, -1, -1},//UNAVAILABLE
+    {   0, -1, -1, -1},//UNAVAILABLE
+    {0x6c, -1, -1, -1},//RESERVED SPI_CS1
+    {0x70, -1, -1, -1},//RESERVED SPI_HD
+    {0x74, -1, -1, -1},//RESERVED SPI_WP
+    {0x78, -1, -1, -1},//RESERVED SPI_CS0
+    {0x7c, -1, -1, -1},//RESERVED SPI_CLK
+    {0x80, -1, -1, -1},//RESERVED SPI_Q
+    {0x84, -1, -1, -1},//RESERVED SPI_D
+    {0x88, -1, -1, -1},//FSPI_HD
+    {0x8c, -1, -1, -1},//FSPI_CS0
+    {0x90, -1, -1, -1},//FSPI_D
+    {0x94, -1, -1, -1},//FSPI_CLK
+    {0x98, -1, -1, -1},//FSPI_Q
+    {0x9c, -1, -1, -1},//FSPI_WP
+    {0xa0, -1, -1, -1},//MTCK
+    {0xa4, -1, -1, -1},//MTDO
+    {0xa8, -1, -1, -1},//MTDI
+    {0xac, -1, -1, -1},//MTMS
+    {0xb0, -1, -1, -1},//TXD0
+    {0xb4, -1, -1, -1},//RXD0
+    {0xb8, -1, -1, -1},//SCL?
+    {0xbc, -1, -1, -1},//INPUT ONLY
+    {0, -1, -1, -1}
+#endif
 };
 
 typedef void (*voidFuncPtr)(void);
@@ -76,56 +151,57 @@ typedef struct {
     void* arg;
     bool functional;
 } InterruptHandle_t;
-static InterruptHandle_t __pinInterruptHandlers[GPIO_PIN_COUNT] = {0,};
+static InterruptHandle_t __pinInterruptHandlers[SOC_GPIO_PIN_COUNT] = {0,};
 
 #include "driver/rtc_io.h"
 
-extern void IRAM_ATTR __pinMode(uint8_t pin, uint8_t mode)
+extern void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode)
 {
 
     if(!digitalPinIsValid(pin)) {
         return;
     }
 
-    uint32_t rtc_reg = rtc_gpio_desc[pin].reg;
+    int8_t rtc_io = esp32_gpioMux[pin].rtc;
+    uint32_t rtc_reg = (rtc_io != -1)?rtc_io_desc[rtc_io].reg:0;
     if(mode == ANALOG) {
         if(!rtc_reg) {
             return;//not rtc pin
         }
-        //lock rtc
+#if CONFIG_IDF_TARGET_ESP32S2
-        uint32_t reg_val = ESP_REG(rtc_reg);
+        SENS.sar_io_mux_conf.iomux_clk_gate_en = 1;
-        if(reg_val & rtc_gpio_desc[pin].mux){
+#endif
-            return;//already in adc mode
+        SET_PERI_REG_MASK(rtc_io_desc[rtc_io].reg, (rtc_io_desc[rtc_io].mux));
+        SET_PERI_REG_BITS(rtc_io_desc[rtc_io].reg, RTC_IO_TOUCH_PAD1_FUN_SEL_V, 0, rtc_io_desc[rtc_io].func);
+
+        RTCIO.pin[rtc_io].pad_driver = 0;//OD = 1
+        RTCIO.enable_w1tc.w1tc = (1U << rtc_io);
+        CLEAR_PERI_REG_MASK(rtc_io_desc[rtc_io].reg, rtc_io_desc[rtc_io].ie);
+
+        if (rtc_io_desc[rtc_io].pullup) {
+            CLEAR_PERI_REG_MASK(rtc_io_desc[rtc_io].reg, rtc_io_desc[rtc_io].pullup);
         }
-        reg_val &= ~(
+        if (rtc_io_desc[rtc_io].pulldown) {
-                (RTC_IO_TOUCH_PAD1_FUN_SEL_V << rtc_gpio_desc[pin].func)
+            CLEAR_PERI_REG_MASK(rtc_io_desc[rtc_io].reg, rtc_io_desc[rtc_io].pulldown);
-                |rtc_gpio_desc[pin].ie
+        }
-                |rtc_gpio_desc[pin].pullup
+        ESP_REG(DR_REG_IO_MUX_BASE + esp32_gpioMux[pin].reg) = ((uint32_t)GPIO_FUNC << MCU_SEL_S) | ((uint32_t)2 << FUN_DRV_S) | FUN_IE;
-                |rtc_gpio_desc[pin].pulldown);
-        ESP_REG(RTC_GPIO_ENABLE_W1TC_REG) = (1 << (rtc_gpio_desc[pin].rtc_num + RTC_GPIO_ENABLE_W1TC_S));
-        ESP_REG(rtc_reg) = reg_val | rtc_gpio_desc[pin].mux;
-        //unlock rtc
-        ESP_REG(DR_REG_IO_MUX_BASE + esp32_gpioMux[pin].reg) = ((uint32_t)2 << MCU_SEL_S) | ((uint32_t)2 << FUN_DRV_S) | FUN_IE;
         return;
     }
 
     //RTC pins PULL settings
     if(rtc_reg) {
-        //lock rtc
+        ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_io_desc[rtc_io].mux);
-        ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].mux);
         if(mode & PULLUP) {
-            ESP_REG(rtc_reg) = (ESP_REG(rtc_reg) | rtc_gpio_desc[pin].pullup) & ~(rtc_gpio_desc[pin].pulldown);
+            ESP_REG(rtc_reg) = (ESP_REG(rtc_reg) | rtc_io_desc[rtc_io].pullup) & ~(rtc_io_desc[rtc_io].pulldown);
         } else if(mode & PULLDOWN) {
-            ESP_REG(rtc_reg) = (ESP_REG(rtc_reg) | rtc_gpio_desc[pin].pulldown) & ~(rtc_gpio_desc[pin].pullup);
+            ESP_REG(rtc_reg) = (ESP_REG(rtc_reg) | rtc_io_desc[rtc_io].pulldown) & ~(rtc_io_desc[rtc_io].pullup);
         } else {
-            ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
+            ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_io_desc[rtc_io].pullup | rtc_io_desc[rtc_io].pulldown);
         }
-        //unlock rtc
     }
 
     uint32_t pinFunction = 0, pinControl = 0;
 
-    //lock gpio
     if(mode & INPUT) {
         if(pin < 32) {
             GPIO.enable_w1tc = ((uint32_t)1 << pin);
@@ -133,9 +209,8 @@ extern void IRAM_ATTR __pinMode(uint8_t pin, uint8_t mode)
             GPIO.enable1_w1tc.val = ((uint32_t)1 << (pin - 32));
         }
     } else if(mode & OUTPUT) {
-        if(pin > 33){
+        if(pin >= NUM_OUPUT_PINS){
-            //unlock gpio
+            return;
-            return;//pins above 33 can be only inputs
         } else if(pin < 32) {
             GPIO.enable_w1ts = ((uint32_t)1 << pin);
         } else {
@@ -153,9 +228,17 @@ extern void IRAM_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
     } else if(mode == SPECIAL) {
-        pinFunction |= ((uint32_t)(((pin)==1||(pin)==3)?0:1) << MCU_SEL_S);
+#if CONFIG_IDF_TARGET_ESP32
+        pinFunction |= ((uint32_t)(((pin)==RX||(pin)==TX)?0:1) << MCU_SEL_S);
+#elif CONFIG_IDF_TARGET_ESP32S2
+        pinFunction |= ((uint32_t)(((pin)==RX||(pin)==TX)?0:2) << MCU_SEL_S);
+#endif
     } else {
         pinFunction |= ((uint32_t)(mode >> 5) << MCU_SEL_S);
     }
@@ -167,31 +250,30 @@ extern void IRAM_ATTR __pinMode(uint8_t pin, uint8_t mode)
     }
 
     GPIO.pin[pin].val = pinControl;
-    //unlock gpio
 }
 
-extern void IRAM_ATTR __digitalWrite(uint8_t pin, uint8_t val)
+extern void ARDUINO_ISR_ATTR __digitalWrite(uint8_t pin, uint8_t val)
 {
     if(val) {
         if(pin < 32) {
             GPIO.out_w1ts = ((uint32_t)1 << pin);
-        } else if(pin < 34) {
+        } else if(pin < NUM_OUPUT_PINS) {
             GPIO.out1_w1ts.val = ((uint32_t)1 << (pin - 32));
         }
     } else {
         if(pin < 32) {
             GPIO.out_w1tc = ((uint32_t)1 << pin);
-        } else if(pin < 34) {
+        } else if(pin < NUM_OUPUT_PINS) {
             GPIO.out1_w1tc.val = ((uint32_t)1 << (pin - 32));
         }
     }
 }
 
-extern int IRAM_ATTR __digitalRead(uint8_t pin)
+extern int ARDUINO_ISR_ATTR __digitalRead(uint8_t pin)
 {
     if(pin < 32) {
         return (GPIO.in >> pin) & 0x1;
-    } else if(pin < 40) {
+    } else if(pin < GPIO_PIN_COUNT) {
         return (GPIO.in1.val >> (pin - 32)) & 0x1;
     }
     return 0;
@@ -199,7 +281,7 @@ extern int IRAM_ATTR __digitalRead(uint8_t pin)
 
 static intr_handle_t gpio_intr_handle = NULL;
 
-static void IRAM_ATTR __onPinInterrupt()
+static void ARDUINO_ISR_ATTR __onPinInterrupt()
 {
     uint32_t gpio_intr_status_l=0;
     uint32_t gpio_intr_status_h=0;
@@ -247,7 +329,7 @@ extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc,
 
     if(!interrupt_initialized) {
         interrupt_initialized = true;
-        esp_intr_alloc(ETS_GPIO_INTR_SOURCE, (int)ESP_INTR_FLAG_IRAM, __onPinInterrupt, NULL, &gpio_intr_handle);
+        esp_intr_alloc(ETS_GPIO_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, __onPinInterrupt, NULL, &gpio_intr_handle);
     }
 
     // if new attach without detach remove old info
@@ -260,11 +342,15 @@ extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc,
     __pinInterruptHandlers[pin].functional = functional;
 
     esp_intr_disable(gpio_intr_handle);
+#if CONFIG_IDF_TARGET_ESP32
     if(esp_intr_get_cpu(gpio_intr_handle)) { //APP_CPU
+#endif
         GPIO.pin[pin].int_ena = 1;
+#if CONFIG_IDF_TARGET_ESP32
     } else { //PRO_CPU
         GPIO.pin[pin].int_ena = 4;
     }
+#endif
     GPIO.pin[pin].int_type = intr_type;
     esp_intr_enable(gpio_intr_handle);
 }

cores/esp32/esp32-hal-gpio.h

@@ -25,6 +25,17 @@ extern "C" {
 #endif
 
 #include "esp32-hal.h"
+#include "soc/soc_caps.h"
+
+#if (CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3)
+#define NUM_OUPUT_PINS  45
+#define PIN_DAC1        17
+#define PIN_DAC2        18
+#else
+#define NUM_OUPUT_PINS  34
+#define PIN_DAC1        25
+#define PIN_DAC2        26
+#endif
 
 #define LOW               0x0
 #define HIGH              0x1
@@ -64,15 +75,15 @@ typedef struct {
     int8_t touch;     /*!< Touch Channel number (-1 if not Touch pin) */
 } esp32_gpioMux_t;
 
-extern const esp32_gpioMux_t esp32_gpioMux[40];
+extern const esp32_gpioMux_t esp32_gpioMux[SOC_GPIO_PIN_COUNT];
 extern const int8_t esp32_adc2gpio[20];
 
-#define digitalPinIsValid(pin)          ((pin) < 40 && esp32_gpioMux[(pin)].reg)
+#define digitalPinIsValid(pin)          ((pin) < SOC_GPIO_PIN_COUNT && esp32_gpioMux[(pin)].reg)
-#define digitalPinCanOutput(pin)        ((pin) < 34 && esp32_gpioMux[(pin)].reg)
+#define digitalPinCanOutput(pin)        ((pin) < NUM_OUPUT_PINS && esp32_gpioMux[(pin)].reg)
-#define digitalPinToRtcPin(pin)         (((pin) < 40)?esp32_gpioMux[(pin)].rtc:-1)
+#define digitalPinToRtcPin(pin)         (((pin) < SOC_GPIO_PIN_COUNT)?esp32_gpioMux[(pin)].rtc:-1)
-#define digitalPinToAnalogChannel(pin)  (((pin) < 40)?esp32_gpioMux[(pin)].adc:-1)
+#define digitalPinToAnalogChannel(pin)  (((pin) < SOC_GPIO_PIN_COUNT)?esp32_gpioMux[(pin)].adc:-1)
-#define digitalPinToTouchChannel(pin)   (((pin) < 40)?esp32_gpioMux[(pin)].touch:-1)
+#define digitalPinToTouchChannel(pin)   (((pin) < SOC_GPIO_PIN_COUNT)?esp32_gpioMux[(pin)].touch:-1)
-#define digitalPinToDacChannel(pin)     (((pin) == 25)?0:((pin) == 26)?1:-1)
+#define digitalPinToDacChannel(pin)     (((pin) == PIN_DAC1)?0:((pin) == PIN_DAC2)?1:-1)
 
 void pinMode(uint8_t pin, uint8_t mode);
 void digitalWrite(uint8_t pin, uint8_t val);

cores/esp32/esp32-hal-i2c.c

@@ -18,13 +18,28 @@
 #include "freertos/task.h"
 #include "freertos/semphr.h"
 #include "freertos/event_groups.h"
-#include "rom/ets_sys.h"
 #include "driver/periph_ctrl.h"
 #include "soc/i2c_reg.h"
 #include "soc/i2c_struct.h"
 #include "soc/dport_reg.h"
 #include "esp_attr.h"
 #include "esp32-hal-cpu.h" // cpu clock change support 31DEC2018
+
+#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"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/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"
+#endif
+
+
+#if CONFIG_IDF_TARGET_ESP32
 //#define I2C_DEV(i)   (volatile i2c_dev_t *)((i)?DR_REG_I2C1_EXT_BASE:DR_REG_I2C_EXT_BASE)
 //#define I2C_DEV(i)   ((i2c_dev_t *)(REG_I2C_BASE(i)))
 #define I2C_SCL_IDX(p)  ((p==0)?I2CEXT0_SCL_OUT_IDX:((p==1)?I2CEXT1_SCL_OUT_IDX:0))
@@ -227,7 +242,7 @@ static i2c_t _i2c_bus_array[2] = {
 
 /* Stickbreaker ISR mode debug support
  */
-static void IRAM_ATTR i2cDumpCmdQueue(i2c_t *i2c)
+static void ARDUINO_ISR_ATTR i2cDumpCmdQueue(i2c_t *i2c)
 {
 #if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR)&&(defined ENABLE_I2C_DEBUG_BUFFER)
     static const char * const cmdName[] ={"RSTART","WRITE","READ","STOP","END"};
@@ -357,7 +372,7 @@ static void i2cDumpInts(uint8_t num)
 #endif
 
 #if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)&&(defined ENABLE_I2C_DEBUG_BUFFER)
-static void IRAM_ATTR i2cDumpStatus(i2c_t * i2c){
+static void ARDUINO_ISR_ATTR i2cDumpStatus(i2c_t * i2c){
     typedef union {
         struct {
             uint32_t ack_rec:             1;        /*This register stores the value of ACK bit.*/
@@ -431,7 +446,7 @@ if(i != fifoPos){// actual data
 }
 #endif
 
-static void IRAM_ATTR i2cTriggerDumps(i2c_t * i2c, uint8_t trigger, const char locus[]){
+static void ARDUINO_ISR_ATTR i2cTriggerDumps(i2c_t * i2c, uint8_t trigger, const char locus[]){
 #if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)&&(defined ENABLE_I2C_DEBUG_BUFFER)
     if( trigger ){
       log_i("%s",locus);      
@@ -478,7 +493,7 @@ static void i2cApbChangeCallback(void * arg, apb_change_ev_t ev_type, uint32_t o
 }
 /* End of CPU Clock change Support
 */ 
-static void IRAM_ATTR i2cSetCmd(i2c_t * i2c, uint8_t index, uint8_t op_code, uint8_t byte_num, bool ack_val, bool ack_exp, bool ack_check)
+static void ARDUINO_ISR_ATTR i2cSetCmd(i2c_t * i2c, uint8_t index, uint8_t op_code, uint8_t byte_num, bool ack_val, bool ack_exp, bool ack_check)
 {
     I2C_COMMAND_t cmd;
     cmd.val=0;
@@ -491,7 +506,7 @@ static void IRAM_ATTR i2cSetCmd(i2c_t * i2c, uint8_t index, uint8_t op_code, uin
 }
  
 
-static void IRAM_ATTR fillCmdQueue(i2c_t * i2c, bool INTS)
+static void ARDUINO_ISR_ATTR fillCmdQueue(i2c_t * i2c, bool INTS)
 {
     /* this function is called on initial i2cProcQueue() or when a I2C_END_DETECT_INT occurs
      */
@@ -649,7 +664,7 @@ static void IRAM_ATTR fillCmdQueue(i2c_t * i2c, bool INTS)
     }
 }
 
-static void IRAM_ATTR fillTxFifo(i2c_t * i2c)
+static void ARDUINO_ISR_ATTR fillTxFifo(i2c_t * i2c)
 {
     /*
     12/01/2017 The Fifo's are independent, 32 bytes of tx and 32 bytes of Rx.
@@ -741,7 +756,7 @@ static void IRAM_ATTR fillTxFifo(i2c_t * i2c)
 }
 
 
-static void IRAM_ATTR emptyRxFifo(i2c_t * i2c)
+static void ARDUINO_ISR_ATTR emptyRxFifo(i2c_t * i2c)
 {
     uint32_t d, cnt=0, moveCnt;
     
@@ -800,7 +815,7 @@ static void IRAM_ATTR emptyRxFifo(i2c_t * i2c)
 #endif
 }
 
-static void IRAM_ATTR i2cIsrExit(i2c_t * i2c,const uint32_t eventCode,bool Fatal)
+static void ARDUINO_ISR_ATTR i2cIsrExit(i2c_t * i2c,const uint32_t eventCode,bool Fatal)
 {
 
     switch(eventCode) {
@@ -845,7 +860,7 @@ static void IRAM_ATTR i2cIsrExit(i2c_t * i2c,const uint32_t eventCode,bool Fatal
 
 }
 
-static void IRAM_ATTR i2c_update_error_byte_cnt(i2c_t * i2c)
+static void ARDUINO_ISR_ATTR i2c_update_error_byte_cnt(i2c_t * i2c)
 {
 /* i2c_update_error_byte_cnt 07/18/2018
   Only called after an error has occurred, so, most of the time this function is never used.
@@ -892,7 +907,7 @@ static void IRAM_ATTR i2c_update_error_byte_cnt(i2c_t * i2c)
     i2c->errorByteCnt = bc;
  }
 
-static void IRAM_ATTR i2c_isr_handler_default(void* arg)
+static void ARDUINO_ISR_ATTR i2c_isr_handler_default(void* arg)
 {
     i2c_t* p_i2c = (i2c_t*) arg; // recover data
     uint32_t activeInt = p_i2c->dev->int_status.val&0x7FF;
@@ -1239,7 +1254,7 @@ i2c_err_t i2cProcQueue(i2c_t * i2c, uint32_t *readCount, uint16_t timeOutMillis)
     if(!i2c->intr_handle) { // create ISR for either peripheral
         // log_i("create ISR %d",i2c->num);
         uint32_t ret = 0;
-        uint32_t flags = ESP_INTR_FLAG_IRAM |  //< ISR can be called if cache is disabled
+        uint32_t flags = ARDUINO_ISR_FLAG |  //< ISR can be called if cache is disabled
           ESP_INTR_FLAG_LOWMED |   //< Low and medium prio interrupts. These can be handled in C.
           ESP_INTR_FLAG_SHARED; //< Reduce resource requirements, Share interrupts
       
@@ -1270,7 +1285,7 @@ i2c_err_t i2cProcQueue(i2c_t * i2c, uint32_t *readCount, uint16_t timeOutMillis)
 
     i2c->dev->ctr.trans_start=1; // go for it
 
-#if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR
+#if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_DEBUG
     portTickType tBefore=xTaskGetTickCount();
 #endif
     
@@ -1278,7 +1293,7 @@ i2c_err_t i2cProcQueue(i2c_t * i2c, uint32_t *readCount, uint16_t timeOutMillis)
     
     uint32_t eBits = xEventGroupWaitBits(i2c->i2c_event,EVENT_DONE,pdFALSE,pdTRUE,ticksTimeOut);
 
-#if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR
+#if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_DEBUG
     portTickType tAfter=xTaskGetTickCount();
 #endif
 
@@ -1480,7 +1495,9 @@ i2c_err_t i2cDetachSDA(i2c_t * i2c, int8_t sda)
  * */
 // 24Nov17 only supports Master Mode
 i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t frequency) {
+#ifdef ENABLE_I2C_DEBUG_BUFFER
   log_v("num=%d sda=%d scl=%d freq=%d",i2c_num, sda, scl, frequency);
+#endif
     if(i2c_num > 1) {
         return NULL;
     }
@@ -1674,8 +1691,9 @@ i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed)
         clk_speed = apb/(period*2);
         log_d("APB Freq too fast, Increasing i2c Freq to %d Hz",clk_speed);
     }
+#ifdef ENABLE_I2C_DEBUG_BUFFER
     log_v("freq=%dHz",clk_speed);
-      
+#endif      
     uint32_t halfPeriod = period/2;
     uint32_t quarterPeriod = period/4;
 
@@ -1689,14 +1707,17 @@ i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed)
     available when a Fifo interrupt is triggered.  This allows enough room in the Fifo so that
     interrupt latency does not cause a Fifo overflow/underflow event.
 */
+#ifdef ENABLE_I2C_DEBUG_BUFFER
     log_v("cpu Freq=%dMhz, i2c Freq=%dHz",getCpuFrequencyMhz(),clk_speed);
+#endif
     uint32_t fifo_delta = (INTERRUPT_CYCLE_OVERHEAD/((getCpuFrequencyMhz()*1000000 / clk_speed)*10))+1; 
     if (fifo_delta > 24) fifo_delta=24;   
     f.rx_fifo_full_thrhd = 32 - fifo_delta;
     f.tx_fifo_empty_thrhd = fifo_delta;
     i2c->dev->fifo_conf.val = f.val; // set thresholds
+#ifdef ENABLE_I2C_DEBUG_BUFFER
     log_v("Fifo delta=%d",fifo_delta);
-
+#endif
     //the clock num during SCL is low level
     i2c->dev->scl_low_period.period = period;
     //the clock num during SCL is high level
@@ -1751,7 +1772,133 @@ uint32_t i2cGetStatus(i2c_t * i2c){
     }
     else return 0;
 }
+#else
+#include "driver/i2c.h"
 
+#define ACK_CHECK_EN                1                   /*!< I2C master will check ack from slave*/
+#define ACK_CHECK_DIS               0                   /*!< I2C master will not check ack from slave */
+#define ACK_VAL                     0x0                 /*!< I2C ack value */
+#define NACK_VAL                    0x1                 /*!< I2C nack value */
+
+struct i2c_struct_t {
+	i2c_port_t num;
+};
+
+static i2c_t * i2c_ports[2] = {NULL, NULL};
+
+i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed){
+	if(i2c_num >= 2){
+		return NULL;
+	}
+	i2c_t * out = NULL;
+	if(i2c_ports[i2c_num] == NULL){
+		out = (i2c_t*)malloc(sizeof(i2c_t));
+		if(out == NULL){
+			log_e("malloc failed");
+			return NULL;
+		}
+		out->num = (i2c_port_t)i2c_num;
+		i2c_ports[i2c_num] = out;
+	} else {
+		out = i2c_ports[i2c_num];
+		i2c_driver_delete((i2c_port_t)i2c_num);
+	}
+
+    i2c_config_t conf;
+    conf.mode = I2C_MODE_MASTER;
+    conf.scl_io_num = (gpio_num_t)scl;
+    conf.sda_io_num = (gpio_num_t)sda;
+    conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
+    conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
+    conf.master.clk_speed = clk_speed;
+    esp_err_t ret = i2c_param_config(out->num, &conf);
+    if (ret != ESP_OK) {
+        log_e("i2c_param_config failed");
+        free(out);
+        i2c_ports[i2c_num] = NULL;
+        return NULL;
+    }
+    ret = i2c_driver_install(out->num, conf.mode, 0, 0, 0);
+    if (ret != ESP_OK) {
+        log_e("i2c_driver_install failed");
+        free(out);
+        i2c_ports[i2c_num] = NULL;
+        return NULL;
+    }
+    return out;
+}
+
+i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis){
+	esp_err_t ret = ESP_OK;
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, ACK_CHECK_EN);
+    i2c_master_write(cmd, buff, size, ACK_CHECK_EN);
+    //if send stop?
+    i2c_master_stop(cmd);
+    ret = i2c_master_cmd_begin(i2c->num, cmd, timeOutMillis / portTICK_RATE_MS);
+    i2c_cmd_link_delete(cmd);
+    return ret;
+}
+
+i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis, uint32_t *readCount){
+	esp_err_t ret = ESP_OK;
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_READ, ACK_CHECK_EN);
+    if (size > 1) {
+        i2c_master_read(cmd, buff, size - 1, ACK_VAL);
+    }
+    i2c_master_read_byte(cmd, buff + size - 1, NACK_VAL);
+    i2c_master_stop(cmd);
+    ret = i2c_master_cmd_begin(i2c->num, cmd, timeOutMillis / portTICK_RATE_MS);
+    i2c_cmd_link_delete(cmd);
+    if(ret == ESP_OK){
+    	*readCount = size;
+    }
+    return ret;
+}
+
+void i2cRelease(i2c_t *i2c){
+	log_w("");
+    return;
+}
+i2c_err_t i2cFlush(i2c_t *i2c){
+	esp_err_t ret = i2c_reset_tx_fifo(i2c->num);
+    if(ret != ESP_OK){
+    	return ret;
+    }
+    return i2c_reset_rx_fifo(i2c->num);
+}
+i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed){
+	log_w("");
+    return ESP_OK;
+}
+uint32_t i2cGetFrequency(i2c_t * i2c){
+	log_w("");
+    return 0;
+}
+uint32_t i2cGetStatus(i2c_t * i2c){
+	log_w("");
+    return 0;
+}
+
+//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){
+    return ESP_FAIL;
+}
+i2c_err_t i2cDetachSCL(i2c_t * i2c, int8_t scl){
+    return ESP_FAIL;
+}
+i2c_err_t i2cAttachSDA(i2c_t * i2c, int8_t sda){
+    return ESP_FAIL;
+}
+i2c_err_t i2cDetachSDA(i2c_t * i2c, int8_t sda){
+    return ESP_FAIL;
+}
+
+#endif /* CONFIG_IDF_TARGET_ESP32 */
 
 /* todo
   22JUL18

cores/esp32/esp32-hal-ledc.c

@@ -16,19 +16,34 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/semphr.h"
-#include "rom/ets_sys.h"
 #include "esp32-hal-matrix.h"
 #include "soc/dport_reg.h"
 #include "soc/ledc_reg.h"
 #include "soc/ledc_struct.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"
+#define LAST_CHAN (15)
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/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
+#else // ESP32 Before IDF 4.0
+#include "rom/ets_sys.h"
+#endif
+
 #if CONFIG_DISABLE_HAL_LOCKS
 #define LEDC_MUTEX_LOCK()
 #define LEDC_MUTEX_UNLOCK()
 #else
 #define LEDC_MUTEX_LOCK()    do {} while (xSemaphoreTake(_ledc_sys_lock, portMAX_DELAY) != pdPASS)
 #define LEDC_MUTEX_UNLOCK()  xSemaphoreGive(_ledc_sys_lock)
-xSemaphoreHandle _ledc_sys_lock;
+xSemaphoreHandle _ledc_sys_lock = NULL;
 #endif
 
 /*
@@ -55,27 +70,35 @@ xSemaphoreHandle _ledc_sys_lock;
 
 static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
     if(ev_type == APB_AFTER_CHANGE && old_apb != new_apb){
-        uint32_t iarg = (uint32_t)arg;
+        uint16_t iarg = *(uint16_t*)arg;
-        uint8_t chan = iarg;
+        uint8_t chan = 0;
-        uint8_t group=(chan/8), timer=((chan/2)%4);
         old_apb /= 1000000;
         new_apb /= 1000000;
-        if(LEDC_TIMER(group, timer).conf.tick_sel){
+        while(iarg){ // run though all active channels, adjusting timing configurations
-            LEDC_MUTEX_LOCK();
+            if(iarg & 1) {// this channel is active
-            uint32_t old_div = LEDC_TIMER(group, timer).conf.clock_divider;
+                uint8_t group=(chan/8), timer=((chan/2)%4);
-            uint32_t div_num = (new_apb * old_div) / old_apb;
+                if(LEDC_TIMER(group, timer).conf.tick_sel){
-            if(div_num > LEDC_DIV_NUM_HSTIMER0_V){
+                    LEDC_MUTEX_LOCK();
-                new_apb = REF_CLK_FREQ / 1000000;
+                    uint32_t old_div = LEDC_TIMER(group, timer).conf.clock_divider;
-                div_num = (new_apb * old_div) / old_apb;
+                    uint32_t div_num = (new_apb * old_div) / old_apb;
-                if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
+                    if(div_num > LEDC_DIV_NUM_HSTIMER0_V){
-                    div_num = LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
+                        div_num = ((REF_CLK_FREQ /1000000) * old_div) / old_apb;
+                        if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
+                            div_num = LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
+                        }
+                        LEDC_TIMER(group, timer).conf.tick_sel = 0;
+                    } else if(div_num < 256) {
+                        div_num = 256;//highest clock possible
+                    }
+                    LEDC_TIMER(group, timer).conf.clock_divider = div_num;
+                    LEDC_MUTEX_UNLOCK();
+                }
+                else {
+                    log_d("using REF_CLK chan=%d",chan);
                 }
-                LEDC_TIMER(group, timer).conf.tick_sel = 0;
-            } else if(div_num < 256) {
-                div_num = 256;//highest clock possible
             }
-            LEDC_TIMER(group, timer).conf.clock_divider = div_num;
+            iarg = iarg >> 1;
-            LEDC_MUTEX_UNLOCK();
+            chan++;
         }
     }
 }
@@ -85,11 +108,14 @@ 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(!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);
         LEDC.conf.apb_clk_sel = 1;//LS use apb clock
+        addApbChangeCallback((void*)&_activeChannels, _on_apb_change);
+
 #if !CONFIG_DISABLE_HAL_LOCKS
         _ledc_sys_lock = xSemaphoreCreateMutex();
 #endif
@@ -98,15 +124,18 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
     LEDC_TIMER(group, timer).conf.clock_divider = div_num;//18 bit (10.8) This register is used to configure parameter for divider in timer the least significant eight bits represent the decimal part.
     LEDC_TIMER(group, timer).conf.duty_resolution = bit_num;//5 bit This register controls the range of the counter in timer. the counter range is [0 2**bit_num] the max bit width for counter is 20.
     LEDC_TIMER(group, timer).conf.tick_sel = apb_clk;//apb clock
+#if CONFIG_IDF_TARGET_ESP32
     if(group) {
+#endif
         LEDC_TIMER(group, timer).conf.low_speed_update = 1;//This bit is only useful for low speed timer channels, reserved for high speed timers
+#if CONFIG_IDF_TARGET_ESP32
     }
+#endif
     LEDC_TIMER(group, timer).conf.pause = 0;
     LEDC_TIMER(group, timer).conf.rst = 1;//This bit is used to reset timer the counter will be 0 after reset.
     LEDC_TIMER(group, timer).conf.rst = 0;
     LEDC_MUTEX_UNLOCK();
-    uint32_t iarg = chan;
+    _activeChannels |= (1 << chan); // mark as active for APB callback
-    addApbChangeCallback((void*)iarg, _on_apb_change);
 }
 
 //max div_num 0x3FFFF (262143)
@@ -166,17 +195,21 @@ static void _ledcSetupChannel(uint8_t chan, uint8_t idle_level)
     LEDC_CHAN(group, channel).duty.duty = 0;
     LEDC_CHAN(group, channel).conf0.sig_out_en = 0;//This is the output enable control bit for channel
     LEDC_CHAN(group, channel).conf1.duty_start = 0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
+#if CONFIG_IDF_TARGET_ESP32
     if(group) {
-        LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
+#endif
+        LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
+#if CONFIG_IDF_TARGET_ESP32
     } else {
         LEDC_CHAN(group, channel).conf0.clk_en = 0;
     }
+#endif
     LEDC_MUTEX_UNLOCK();
 }
 
 double ledcSetup(uint8_t chan, double freq, uint8_t bit_num)
 {
-    if(chan > 15) {
+    if(chan > LAST_CHAN) {
         return 0;
     }
     double res_freq = _ledcSetupTimerFreq(chan, freq, bit_num);
@@ -186,7 +219,7 @@ double ledcSetup(uint8_t chan, double freq, uint8_t bit_num)
 
 void ledcWrite(uint8_t chan, uint32_t duty)
 {
-    if(chan > 15) {
+    if(chan > LAST_CHAN) {
         return;
     }
     uint8_t group=(chan/8), channel=(chan%8);
@@ -195,26 +228,34 @@ void ledcWrite(uint8_t chan, uint32_t duty)
     if(duty) {
         LEDC_CHAN(group, channel).conf0.sig_out_en = 1;//This is the output enable control bit for channel
         LEDC_CHAN(group, channel).conf1.duty_start = 1;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
+#if CONFIG_IDF_TARGET_ESP32
         if(group) {
-            LEDC_CHAN(group, channel).conf0.val |= BIT(4);
+#endif
+            LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
+#if CONFIG_IDF_TARGET_ESP32
         } else {
             LEDC_CHAN(group, channel).conf0.clk_en = 1;
         }
+#endif
     } else {
         LEDC_CHAN(group, channel).conf0.sig_out_en = 0;//This is the output enable control bit for channel
         LEDC_CHAN(group, channel).conf1.duty_start = 0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
+#if CONFIG_IDF_TARGET_ESP32
         if(group) {
-            LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
+#endif
+            LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
+#if CONFIG_IDF_TARGET_ESP32
         } else {
             LEDC_CHAN(group, channel).conf0.clk_en = 0;
         }
+#endif
     }
     LEDC_MUTEX_UNLOCK();
 }
 
 uint32_t ledcRead(uint8_t chan)
 {
-    if(chan > 15) {
+    if(chan > LAST_CHAN) {
         return 0;
     }
     return LEDC.channel_group[chan/8].channel[chan%8].duty.duty >> 4;
@@ -230,7 +271,7 @@ double ledcReadFreq(uint8_t chan)
 
 double ledcWriteTone(uint8_t chan, double freq)
 {
-    if(chan > 15) {
+    if(chan > LAST_CHAN) {
         return 0;
     }
     if(!freq) {
@@ -257,11 +298,15 @@ double ledcWriteNote(uint8_t chan, note_t note, uint8_t octave){
 
 void ledcAttachPin(uint8_t pin, uint8_t chan)
 {
-    if(chan > 15) {
+    if(chan > LAST_CHAN) {
         return;
     }
     pinMode(pin, OUTPUT);
+#if CONFIG_IDF_TARGET_ESP32S2
+    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);
+#endif
 }
 
 void ledcDetachPin(uint8_t pin)

cores/esp32/esp32-hal-log.h

@@ -20,6 +20,7 @@ extern "C"
 #endif
 
 #include "sdkconfig.h"
+#include "esp_timer.h"
 
 #define ARDUHAL_LOG_LEVEL_NONE       (0)
 #define ARDUHAL_LOG_LEVEL_ERROR      (1)
@@ -75,7 +76,7 @@ const char * pathToFileName(const char * path);
 int log_printf(const char *fmt, ...);
 
 #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 "[" #letter "][%s:%u] %s(): " format ARDUHAL_LOG_RESET_COLOR "\r\n", pathToFileName(__FILE__), __LINE__, __FUNCTION__
+#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, ...) log_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)

cores/esp32/esp32-hal-matrix.c

@@ -14,33 +14,45 @@
 
 #include "esp32-hal-matrix.h"
 #include "esp_attr.h"
+
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/gpio.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/gpio.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
 #include "rom/gpio.h"
+#endif
 
 #define MATRIX_DETACH_OUT_SIG 0x100
 #define MATRIX_DETACH_IN_LOW_PIN 0x30
 #define MATRIX_DETACH_IN_LOW_HIGH 0x38
 
-void IRAM_ATTR pinMatrixOutAttach(uint8_t pin, uint8_t function, bool invertOut, bool invertEnable)
+void ARDUINO_ISR_ATTR pinMatrixOutAttach(uint8_t pin, uint8_t function, bool invertOut, bool invertEnable)
 {
     gpio_matrix_out(pin, function, invertOut, invertEnable);
 }
 
-void IRAM_ATTR pinMatrixOutDetach(uint8_t pin, bool invertOut, bool invertEnable)
+void ARDUINO_ISR_ATTR pinMatrixOutDetach(uint8_t pin, bool invertOut, bool invertEnable)
 {
     gpio_matrix_out(pin, MATRIX_DETACH_OUT_SIG, invertOut, invertEnable);
 }
 
-void IRAM_ATTR pinMatrixInAttach(uint8_t pin, uint8_t signal, bool inverted)
+void ARDUINO_ISR_ATTR pinMatrixInAttach(uint8_t pin, uint8_t signal, bool inverted)
 {
     gpio_matrix_in(pin, signal, inverted);
 }
 
-void IRAM_ATTR pinMatrixInDetach(uint8_t signal, bool high, bool inverted)
+void ARDUINO_ISR_ATTR pinMatrixInDetach(uint8_t signal, bool high, bool inverted)
 {
     gpio_matrix_in(high?MATRIX_DETACH_IN_LOW_HIGH:MATRIX_DETACH_IN_LOW_PIN, signal, inverted);
 }
 /*
-void IRAM_ATTR intrMatrixAttach(uint32_t source, uint32_t inum){
+void ARDUINO_ISR_ATTR intrMatrixAttach(uint32_t source, uint32_t inum){
   intr_matrix_set(PRO_CPU_NUM, source, inum);
 }
 */

cores/esp32/esp32-hal-misc.c

@@ -31,10 +31,22 @@
 #include "soc/rtc.h"
 #include "soc/rtc_cntl_reg.h"
 #include "soc/apb_ctrl_reg.h"
-#include "rom/rtc.h"
 #include "esp_task_wdt.h"
 #include "esp32-hal.h"
 
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/rtc.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/rtc.h"
+#endif
+
 //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
 uint8_t temprature_sens_read();
@@ -44,11 +56,13 @@ float temperatureRead()
     return (temprature_sens_read() - 32) / 1.8;
 }
 
-void yield()
+void __yield()
 {
     vPortYield();
 }
 
+void yield() __attribute__ ((weak, alias("__yield")));
+
 #if CONFIG_AUTOSTART_ARDUINO
 
 extern TaskHandle_t loopTaskHandle;
@@ -111,12 +125,30 @@ void disableCore1WDT(){
 }
 #endif
 
-unsigned long IRAM_ATTR micros()
+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 IRAM_ATTR millis()
+unsigned long ARDUINO_ISR_ATTR millis()
 {
     return (unsigned long) (esp_timer_get_time() / 1000ULL);
 }
@@ -126,7 +158,7 @@ void delay(uint32_t ms)
     vTaskDelay(ms / portTICK_PERIOD_MS);
 }
 
-void IRAM_ATTR delayMicroseconds(uint32_t us)
+void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us)
 {
     uint32_t m = micros();
     if(us){
@@ -178,7 +210,7 @@ void initArduino()
 #ifdef F_CPU
     setCpuFrequencyMhz(F_CPU/1000000);
 #endif
-#if CONFIG_SPIRAM_SUPPORT
+#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
     psramInit();
 #endif
     esp_log_level_set("*", CONFIG_LOG_DEFAULT_LEVEL);
@@ -207,7 +239,7 @@ void initArduino()
 }
 
 //used by hal log
-const char * IRAM_ATTR pathToFileName(const char * path)
+const char * ARDUINO_ISR_ATTR pathToFileName(const char * path)
 {
     size_t i = 0;
     size_t pos = 0;

cores/esp32/esp32-hal-psram.c

@@ -1,11 +1,37 @@
+// 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"
 
-#if CONFIG_SPIRAM_SUPPORT
+#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
-#include "esp_spiram.h"
 #include "soc/efuse_reg.h"
 #include "esp_heap_caps.h"
 
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/spiram.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/spiram.h"
+#include "esp32s2/rom/cache.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "esp_spiram.h"
+#endif
+
 static volatile bool spiramDetected = false;
 static volatile bool spiramFailed = false;
 
@@ -17,6 +43,7 @@ bool psramInit(){
     if (spiramFailed) {
         return false;
     }
+#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;
     if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 || pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2) {
@@ -25,13 +52,21 @@ bool psramInit(){
         return false;
     }
     esp_spiram_init_cache();
+#elif CONFIG_IDF_TARGET_ESP32S2
+    extern void esp_config_data_cache_mode(void);
+    esp_config_data_cache_mode();
+    Cache_Enable_DCache(0);
+#endif
     if (esp_spiram_init() != ESP_OK) {
         spiramFailed = true;
         log_w("PSRAM init failed!");
+#if CONFIG_IDF_TARGET_ESP32
         pinMatrixOutDetach(16, false, false);
         pinMatrixOutDetach(17, false, false);
+#endif
         return false;
     }
+    esp_spiram_init_cache();
     if (!esp_spiram_test()) {
         spiramFailed = true;
         log_e("PSRAM test failed!");
@@ -42,31 +77,34 @@ bool psramInit(){
         log_e("PSRAM could not be added to the heap!");
         return false;
     }
+#if CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL && !CONFIG_ARDUINO_ISR_IRAM
+        heap_caps_malloc_extmem_enable(CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL);
+#endif
 #endif
     spiramDetected = true;
     log_d("PSRAM enabled");
     return true;
 }
 
-bool IRAM_ATTR psramFound(){
+bool ARDUINO_ISR_ATTR psramFound(){
     return spiramDetected;
 }
 
-void IRAM_ATTR *ps_malloc(size_t size){
+void ARDUINO_ISR_ATTR *ps_malloc(size_t size){
     if(!spiramDetected){
         return NULL;
     }
     return heap_caps_malloc(size, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
 }
 
-void IRAM_ATTR *ps_calloc(size_t n, size_t size){
+void ARDUINO_ISR_ATTR *ps_calloc(size_t n, size_t size){
     if(!spiramDetected){
         return NULL;
     }
     return heap_caps_calloc(n, size, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
 }
 
-void IRAM_ATTR *ps_realloc(void *ptr, size_t size){
+void ARDUINO_ISR_ATTR *ps_realloc(void *ptr, size_t size){
     if(!spiramDetected){
         return NULL;
     }
@@ -79,19 +117,19 @@ bool psramInit(){
     return false;
 }
 
-bool IRAM_ATTR psramFound(){
+bool ARDUINO_ISR_ATTR psramFound(){
     return false;
 }
 
-void IRAM_ATTR *ps_malloc(size_t size){
+void ARDUINO_ISR_ATTR *ps_malloc(size_t size){
     return NULL;
 }
 
-void IRAM_ATTR *ps_calloc(size_t n, size_t size){
+void ARDUINO_ISR_ATTR *ps_calloc(size_t n, size_t size){
     return NULL;
 }
 
-void IRAM_ATTR *ps_realloc(void *ptr, size_t size){
+void ARDUINO_ISR_ATTR *ps_realloc(void *ptr, size_t size){
     return NULL;
 }
 

cores/esp32/esp32-hal-psram.h

@@ -19,6 +19,17 @@
 extern "C" {
 #endif
 
+#include "sdkconfig.h"
+
+#ifndef BOARD_HAS_PSRAM
+#ifdef CONFIG_SPIRAM_SUPPORT
+#undef CONFIG_SPIRAM_SUPPORT
+#endif
+#ifdef CONFIG_SPIRAM
+#undef CONFIG_SPIRAM
+#endif
+#endif
+
 bool psramInit();
 bool psramFound();
 

cores/esp32/esp32-hal-rmt.c

@@ -19,18 +19,20 @@
 #include "esp32-hal.h"
 #include "esp8266-compat.h"
 #include "soc/gpio_reg.h"
-#include "soc/gpio_reg.h"
-
-#include "esp32-hal-rmt.h"
-#include "driver/periph_ctrl.h"
-
 #include "soc/rmt_struct.h"
+#include "driver/periph_ctrl.h"
 #include "esp_intr_alloc.h"
 
 /**
  * Internal macros
  */
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
 #define MAX_CHANNELS 8
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define MAX_CHANNELS 4
+#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)
@@ -100,7 +102,10 @@ struct rmt_obj_s
  * Internal variables for channel descriptors
  */
 static xSemaphoreHandle g_rmt_objlocks[MAX_CHANNELS] = {
-    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+    NULL, NULL, NULL, NULL, 
+#if CONFIG_IDF_TARGET_ESP32
+    NULL, NULL, NULL, NULL
+#endif
 };
 
 static rmt_obj_t g_rmt_objects[MAX_CHANNELS] = {
@@ -108,10 +113,12 @@ static rmt_obj_t g_rmt_objects[MAX_CHANNELS] = {
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
+#if CONFIG_IDF_TARGET_ESP32
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
     { false, NULL, 0, 0, 0, 0, 0, NULL, E_NO_INTR, E_INACTIVE, NULL, false},
+#endif
 };
 
 /**
@@ -128,19 +135,19 @@ static xSemaphoreHandle g_rmt_block_lock = NULL;
  */
 static void _initPin(int pin, int channel, bool tx_not_rx);
 
-static bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size);
+static bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size, bool continuous);
 
-static void IRAM_ATTR _rmt_isr(void* arg);
+static void ARDUINO_ISR_ATTR _rmt_isr(void* arg);
 
 static rmt_obj_t* _rmtAllocate(int pin, int from, int size);
 
 static void _initPin(int pin, int channel, bool tx_not_rx);
 
-static int IRAM_ATTR _rmt_get_mem_len(uint8_t channel);
+static int ARDUINO_ISR_ATTR _rmt_get_mem_len(uint8_t channel);
 
-static void IRAM_ATTR _rmt_tx_mem_first(uint8_t ch);
+static void ARDUINO_ISR_ATTR _rmt_tx_mem_first(uint8_t ch);
 
-static void IRAM_ATTR _rmt_tx_mem_second(uint8_t ch);
+static void ARDUINO_ISR_ATTR _rmt_tx_mem_second(uint8_t ch);
 
 
 /**
@@ -234,6 +241,20 @@ bool rmtDeinit(rmt_obj_t *rmt)
     return true;
 }
 
+bool rmtLoop(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
+{
+    if (!rmt) {
+        return false;
+    }
+
+    int allocated_size = MAX_DATA_PER_CHANNEL * rmt->buffers;
+
+    if (size > allocated_size) {
+        return false;
+    }
+    return _rmtSendOnce(rmt, data, size, true);
+}
+
 bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
 {
     if (!rmt) {
@@ -249,7 +270,7 @@ bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
         RMT_MUTEX_LOCK(channel);
         // setup interrupt handler if not yet installed for half and full tx
         if (!intr_handle) {
-            esp_intr_alloc(ETS_RMT_INTR_SOURCE, (int)ESP_INTR_FLAG_IRAM, _rmt_isr, NULL, &intr_handle);
+            esp_intr_alloc(ETS_RMT_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, _rmt_isr, NULL, &intr_handle);
         }
 
         rmt->data_size = size - MAX_DATA_PER_ITTERATION;
@@ -282,10 +303,10 @@ 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);
+        return _rmtSendOnce(rmt, data, MAX_DATA_PER_ITTERATION, false);
     } else {
         // use one-go mode if data fits one buffer 
-        return _rmtSendOnce(rmt, data, size);
+        return _rmtSendOnce(rmt, data, size, false);
     }
 }
 
@@ -483,7 +504,7 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
             break;
         }
     }
-    if (i == MAX_CHANNELS || i+j >= MAX_CHANNELS || j != buffers)  {
+    if (i == MAX_CHANNELS || i+j > MAX_CHANNELS || j != buffers)  {
         xSemaphoreGive(g_rmt_block_lock);
         return NULL;
     }
@@ -518,12 +539,17 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
     RMT.conf_ch[channel].conf0.mem_size = buffers;
     RMT.conf_ch[channel].conf0.carrier_en = 0;
     RMT.conf_ch[channel].conf0.carrier_out_lv = 0;
+#if CONFIG_IDF_TARGET_ESP32
     RMT.conf_ch[channel].conf0.mem_pd = 0;
-
+#endif
     RMT.conf_ch[channel].conf0.idle_thres = 0x80;
     RMT.conf_ch[channel].conf1.rx_en = 0;
     RMT.conf_ch[channel].conf1.tx_conti_mode = 0;
+#if CONFIG_IDF_TARGET_ESP32
     RMT.conf_ch[channel].conf1.ref_cnt_rst = 0;
+#else
+    RMT.conf_ch[channel].conf1.chk_rx_carrier_en = 0;
+#endif
     RMT.conf_ch[channel].conf1.rx_filter_en = 0;
     RMT.conf_ch[channel].conf1.rx_filter_thres = 0;
     RMT.conf_ch[channel].conf1.idle_out_lv = 0;     // signal level for idle
@@ -543,7 +569,7 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
 
     // install interrupt if at least one channel is active
     if (!intr_handle) {
-        esp_intr_alloc(ETS_RMT_INTR_SOURCE, (int)ESP_INTR_FLAG_IRAM, _rmt_isr, NULL, &intr_handle);
+        esp_intr_alloc(ETS_RMT_INTR_SOURCE, (int)ARDUINO_ISR_FLAG, _rmt_isr, NULL, &intr_handle);
     }
     RMT_MUTEX_UNLOCK(channel);
 
@@ -553,7 +579,7 @@ rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
 /**
  * Private methods definitions
  */
-bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
+bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size, bool continuous)
 {
     if (!rmt) {
         return false;
@@ -571,6 +597,7 @@ bool _rmtSendOnce(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
     }
 
     RMT_MUTEX_LOCK(channel);
+    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;
     RMT_MUTEX_UNLOCK(channel);
@@ -610,7 +637,7 @@ static void _initPin(int pin, int channel, bool tx_not_rx)
 }
 
 
-static void IRAM_ATTR _rmt_isr(void* arg)
+static void ARDUINO_ISR_ATTR _rmt_isr(void* arg)
 {
     int intr_val = RMT.int_st.val;
     size_t ch;
@@ -665,7 +692,6 @@ static void IRAM_ATTR _rmt_isr(void* arg)
         }
 
         if (intr_val & _INT_ERROR(ch)) {
-            digitalWrite(2, 1);
             // clear the flag
             RMT.int_clr.val = _INT_ERROR(ch);
             RMT.int_ena.val &= ~_INT_ERROR(ch);
@@ -701,7 +727,7 @@ static void IRAM_ATTR _rmt_isr(void* arg)
     }
 }
 
-static void IRAM_ATTR _rmt_tx_mem_second(uint8_t ch)
+static void ARDUINO_ISR_ATTR _rmt_tx_mem_second(uint8_t ch)
 {
     DEBUG_INTERRUPT_START(4)
     uint32_t* data = g_rmt_objects[ch].data_ptr;
@@ -753,7 +779,7 @@ static void IRAM_ATTR _rmt_tx_mem_second(uint8_t ch)
     DEBUG_INTERRUPT_END(4);
 }
 
-static void IRAM_ATTR _rmt_tx_mem_first(uint8_t ch)
+static void ARDUINO_ISR_ATTR _rmt_tx_mem_first(uint8_t ch)
 {
     DEBUG_INTERRUPT_START(2);
     uint32_t* data = g_rmt_objects[ch].data_ptr;
@@ -804,7 +830,7 @@ static void IRAM_ATTR _rmt_tx_mem_first(uint8_t ch)
     DEBUG_INTERRUPT_END(2);
 }
 
-static int IRAM_ATTR _rmt_get_mem_len(uint8_t channel)
+static int ARDUINO_ISR_ATTR _rmt_get_mem_len(uint8_t channel)
 {
     int block_num = RMT.conf_ch[channel].conf0.mem_size;
     int item_block_len = block_num * 64;

cores/esp32/esp32-hal-rmt.h

@@ -73,6 +73,12 @@ float rmtSetTick(rmt_obj_t* rmt, float tick);
 */
 bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size);
 
+/**
+*    Loop data up to the reserved memsize continuously
+*
+*/
+bool rmtLoop(rmt_obj_t* rmt, rmt_data_t* data, size_t size);
+
 /**
 *    Initiates async receive, event flag indicates data received
 *
@@ -122,6 +128,10 @@ bool rmtSetCarrier(rmt_obj_t* rmt, bool carrier_en, bool carrier_level, uint32_t
  */
 bool rmtSetFilter(rmt_obj_t* rmt, bool filter_en, uint32_t filter_level);
 
+/**
+ * Deinitialize the driver
+ */
+bool rmtDeinit(rmt_obj_t *rmt);
 
 // TODO:
 //  * uninstall interrupt when all channels are deinit

cores/esp32/esp32-hal-sigmadelta.c

@@ -16,11 +16,23 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/semphr.h"
-#include "rom/ets_sys.h"
 #include "esp32-hal-matrix.h"
 #include "soc/gpio_sd_reg.h"
 #include "soc/gpio_sd_struct.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"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/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"
+#endif
+
 
 #if CONFIG_DISABLE_HAL_LOCKS
 #define SD_MUTEX_LOCK()
@@ -69,6 +81,9 @@ uint32_t sigmaDeltaSetup(uint8_t channel, uint32_t freq) //chan 0-7 freq 1220-31
         prescale = 0xFF;
     }
     SD_MUTEX_LOCK();
+#ifndef CONFIG_IDF_TARGET_ESP32
+    SIGMADELTA.misc.function_clk_en = 1;
+#endif
     SIGMADELTA.channel[channel].prescale = prescale;
     SIGMADELTA.cg.clk_en = 0;
     SIGMADELTA.cg.clk_en = 1;

cores/esp32/esp32-hal-spi.c

@@ -17,10 +17,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/semphr.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.h"
-#include "rom/gpio.h"
 #include "soc/spi_reg.h"
 #include "soc/spi_struct.h"
 #include "soc/io_mux_reg.h"
@@ -28,17 +25,24 @@
 #include "soc/dport_reg.h"
 #include "soc/rtc.h"
 
-#define SPI_CLK_IDX(p)  ((p==0)?SPICLK_OUT_IDX:((p==1)?SPICLK_OUT_IDX:((p==2)?HSPICLK_OUT_IDX:((p==3)?VSPICLK_OUT_IDX:0))))
+#include "esp_system.h"
-#define SPI_MISO_IDX(p) ((p==0)?SPIQ_OUT_IDX:((p==1)?SPIQ_OUT_IDX:((p==2)?HSPIQ_OUT_IDX:((p==3)?VSPIQ_OUT_IDX:0))))
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
-#define SPI_MOSI_IDX(p) ((p==0)?SPID_IN_IDX:((p==1)?SPID_IN_IDX:((p==2)?HSPID_IN_IDX:((p==3)?VSPID_IN_IDX:0))))
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
-
+#include "esp32/rom/ets_sys.h"
-#define SPI_SPI_SS_IDX(n)   ((n==0)?SPICS0_OUT_IDX:((n==1)?SPICS1_OUT_IDX:((n==2)?SPICS2_OUT_IDX:SPICS0_OUT_IDX)))
+#include "esp32/rom/gpio.h"
-#define SPI_HSPI_SS_IDX(n)   ((n==0)?HSPICS0_OUT_IDX:((n==1)?HSPICS1_OUT_IDX:((n==2)?HSPICS2_OUT_IDX:HSPICS0_OUT_IDX)))
+#include "esp_intr_alloc.h"
-#define SPI_VSPI_SS_IDX(n)   ((n==0)?VSPICS0_OUT_IDX:((n==1)?VSPICS1_OUT_IDX:((n==2)?VSPICS2_OUT_IDX:VSPICS0_OUT_IDX)))
+#elif CONFIG_IDF_TARGET_ESP32S2
-#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):((p==3)?SPI_VSPI_SS_IDX(n):0))))
+#include "esp32s2/rom/ets_sys.h"
-
+#include "esp32s2/rom/gpio.h"
-#define SPI_INUM(u)        (2)
+#include "esp_intr_alloc.h"
-#define SPI_INTR_SOURCE(u) ((u==0)?ETS_SPI0_INTR_SOURCE:((u==1)?ETS_SPI1_INTR_SOURCE:((u==2)?ETS_SPI2_INTR_SOURCE:((p==3)?ETS_SPI3_INTR_SOURCE:0))))
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/ets_sys.h"
+#include "rom/gpio.h"
+#include "esp_intr.h"
+#endif
 
 struct spi_struct_t {
     spi_dev_t * dev;
@@ -48,25 +52,69 @@ struct spi_struct_t {
     uint8_t num;
 };
 
+#if CONFIG_IDF_TARGET_ESP32S2
+// ESP32S2
+#define SPI_COUNT           (3)
+
+#define SPI_CLK_IDX(p)      ((p==0)?SPICLK_OUT_MUX_IDX:((p==1)?FSPICLK_OUT_MUX_IDX:((p==2)?SPI3_CLK_OUT_MUX_IDX:0)))
+#define SPI_MISO_IDX(p)     ((p==0)?SPIQ_OUT_IDX:((p==1)?FSPIQ_OUT_IDX:((p==2)?SPI3_Q_OUT_IDX:0)))
+#define SPI_MOSI_IDX(p)     ((p==0)?SPID_IN_IDX:((p==1)?FSPID_IN_IDX:((p==2)?SPI3_D_IN_IDX:0)))
+
+#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_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)))
+
+#else
+// ESP32
+#define SPI_COUNT           (4)
+
+#define SPI_CLK_IDX(p)      ((p==0)?SPICLK_OUT_IDX:((p==1)?SPICLK_OUT_IDX:((p==2)?HSPICLK_OUT_IDX:((p==3)?VSPICLK_OUT_IDX:0))))
+#define SPI_MISO_IDX(p)     ((p==0)?SPIQ_OUT_IDX:((p==1)?SPIQ_OUT_IDX:((p==2)?HSPIQ_OUT_IDX:((p==3)?VSPIQ_OUT_IDX:0))))
+#define SPI_MOSI_IDX(p)     ((p==0)?SPID_IN_IDX:((p==1)?SPID_IN_IDX:((p==2)?HSPID_IN_IDX:((p==3)?VSPID_IN_IDX:0))))
+
+#define SPI_SPI_SS_IDX(n)   ((n==0)?SPICS0_OUT_IDX:((n==1)?SPICS1_OUT_IDX:((n==2)?SPICS2_OUT_IDX:SPICS0_OUT_IDX)))
+#define SPI_HSPI_SS_IDX(n)  ((n==0)?HSPICS0_OUT_IDX:((n==1)?HSPICS1_OUT_IDX:((n==2)?HSPICS2_OUT_IDX:HSPICS0_OUT_IDX)))
+#define SPI_VSPI_SS_IDX(n)  ((n==0)?VSPICS0_OUT_IDX:((n==1)?VSPICS1_OUT_IDX:((n==2)?VSPICS2_OUT_IDX:VSPICS0_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):((p==3)?SPI_VSPI_SS_IDX(n):0))))
+
+#define SPI_INTR_SOURCE(u)  ((u==0)?ETS_SPI0_INTR_SOURCE:((u==1)?ETS_SPI1_INTR_SOURCE:((u==2)?ETS_SPI2_INTR_SOURCE:((p==3)?ETS_SPI3_INTR_SOURCE:0))))
+
+#endif
+
 #if CONFIG_DISABLE_HAL_LOCKS
 #define SPI_MUTEX_LOCK()
 #define SPI_MUTEX_UNLOCK()
 
-static spi_t _spi_bus_array[4] = {
+static spi_t _spi_bus_array[] = {
+#if CONFIG_IDF_TARGET_ESP32S2
+    {(volatile spi_dev_t *)(DR_REG_SPI1_BASE), 0},
+    {(volatile spi_dev_t *)(DR_REG_SPI2_BASE), 1},
+    {(volatile spi_dev_t *)(DR_REG_SPI3_BASE), 2}
+#else
     {(volatile spi_dev_t *)(DR_REG_SPI0_BASE), 0},
     {(volatile spi_dev_t *)(DR_REG_SPI1_BASE), 1},
     {(volatile spi_dev_t *)(DR_REG_SPI2_BASE), 2},
     {(volatile spi_dev_t *)(DR_REG_SPI3_BASE), 3}
+#endif
 };
 #else
 #define SPI_MUTEX_LOCK()    do {} while (xSemaphoreTake(spi->lock, portMAX_DELAY) != pdPASS)
 #define SPI_MUTEX_UNLOCK()  xSemaphoreGive(spi->lock)
 
-static spi_t _spi_bus_array[4] = {
+static spi_t _spi_bus_array[] = {
+#if CONFIG_IDF_TARGET_ESP32S2
+    {(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}
+#else
     {(volatile spi_dev_t *)(DR_REG_SPI0_BASE), NULL, 0},
     {(volatile spi_dev_t *)(DR_REG_SPI1_BASE), NULL, 1},
     {(volatile spi_dev_t *)(DR_REG_SPI2_BASE), NULL, 2},
     {(volatile spi_dev_t *)(DR_REG_SPI3_BASE), NULL, 3}
+#endif
 };
 #endif
 
@@ -76,6 +124,14 @@ void spiAttachSCK(spi_t * spi, int8_t sck)
         return;
     }
     if(sck < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            sck = 36;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             sck = 14;
         } else if(spi->num == VSPI) {
@@ -83,6 +139,7 @@ void spiAttachSCK(spi_t * spi, int8_t sck)
         } else {
             sck = 6;
         }
+#endif
     }
     pinMode(sck, OUTPUT);
     pinMatrixOutAttach(sck, SPI_CLK_IDX(spi->num), false, false);
@@ -94,6 +151,14 @@ void spiAttachMISO(spi_t * spi, int8_t miso)
         return;
     }
     if(miso < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            miso = 37;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             miso = 12;
         } else if(spi->num == VSPI) {
@@ -101,6 +166,7 @@ void spiAttachMISO(spi_t * spi, int8_t miso)
         } else {
             miso = 7;
         }
+#endif
     }
     SPI_MUTEX_LOCK();
     pinMode(miso, INPUT);
@@ -114,6 +180,14 @@ void spiAttachMOSI(spi_t * spi, int8_t mosi)
         return;
     }
     if(mosi < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            mosi = 35;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             mosi = 13;
         } else if(spi->num == VSPI) {
@@ -121,6 +195,7 @@ void spiAttachMOSI(spi_t * spi, int8_t mosi)
         } else {
             mosi = 8;
         }
+#endif
     }
     pinMode(mosi, OUTPUT);
     pinMatrixOutAttach(mosi, SPI_MOSI_IDX(spi->num), false, false);
@@ -132,6 +207,14 @@ void spiDetachSCK(spi_t * spi, int8_t sck)
         return;
     }
     if(sck < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            sck = 36;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             sck = 14;
         } else if(spi->num == VSPI) {
@@ -139,6 +222,7 @@ void spiDetachSCK(spi_t * spi, int8_t sck)
         } else {
             sck = 6;
         }
+#endif
     }
     pinMatrixOutDetach(sck, false, false);
     pinMode(sck, INPUT);
@@ -150,6 +234,14 @@ void spiDetachMISO(spi_t * spi, int8_t miso)
         return;
     }
     if(miso < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            miso = 37;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             miso = 12;
         } else if(spi->num == VSPI) {
@@ -157,6 +249,7 @@ void spiDetachMISO(spi_t * spi, int8_t miso)
         } else {
             miso = 7;
         }
+#endif
     }
     pinMatrixInDetach(SPI_MISO_IDX(spi->num), false, false);
     pinMode(miso, INPUT);
@@ -168,6 +261,14 @@ void spiDetachMOSI(spi_t * spi, int8_t mosi)
         return;
     }
     if(mosi < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            mosi = 35;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             mosi = 13;
         } else if(spi->num == VSPI) {
@@ -175,6 +276,7 @@ void spiDetachMOSI(spi_t * spi, int8_t mosi)
         } else {
             mosi = 8;
         }
+#endif
     }
     pinMatrixOutDetach(mosi, false, false);
     pinMode(mosi, INPUT);
@@ -190,6 +292,14 @@ void spiAttachSS(spi_t * spi, uint8_t cs_num, int8_t ss)
     }
     if(ss < 0) {
         cs_num = 0;
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            ss = 34;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             ss = 15;
         } else if(spi->num == VSPI) {
@@ -197,6 +307,7 @@ void spiAttachSS(spi_t * spi, uint8_t cs_num, int8_t ss)
         } else {
             ss = 11;
         }
+#endif
     }
     pinMode(ss, OUTPUT);
     pinMatrixOutAttach(ss, SPI_SS_IDX(spi->num, cs_num), false, false);
@@ -209,6 +320,14 @@ void spiDetachSS(spi_t * spi, int8_t ss)
         return;
     }
     if(ss < 0) {
+#if CONFIG_IDF_TARGET_ESP32S2
+        if(spi->num == FSPI) {
+            ss = 34;
+        } else {
+            log_e("HSPI Does not have default pins on ESP32S2!");
+            return;
+        }
+#else
         if(spi->num == HSPI) {
             ss = 15;
         } else if(spi->num == VSPI) {
@@ -216,6 +335,7 @@ void spiDetachSS(spi_t * spi, int8_t ss)
         } else {
             ss = 11;
         }
+#endif
     }
     pinMatrixOutDetach(ss, false, false);
     pinMode(ss, INPUT);
@@ -227,7 +347,11 @@ void spiEnableSSPins(spi_t * spi, uint8_t cs_mask)
         return;
     }
     SPI_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32S2
+    spi->dev->misc.val &= ~(cs_mask & SPI_CS_MASK_ALL);
+#else
     spi->dev->pin.val &= ~(cs_mask & SPI_CS_MASK_ALL);
+#endif
     SPI_MUTEX_UNLOCK();
 }
 
@@ -237,7 +361,11 @@ void spiDisableSSPins(spi_t * spi, uint8_t cs_mask)
         return;
     }
     SPI_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32S2
+    spi->dev->misc.val |= (cs_mask & SPI_CS_MASK_ALL);
+#else
     spi->dev->pin.val |= (cs_mask & SPI_CS_MASK_ALL);
+#endif
     SPI_MUTEX_UNLOCK();
 }
 
@@ -269,7 +397,11 @@ void spiSSSet(spi_t * spi)
         return;
     }
     SPI_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32S2
+    spi->dev->misc.cs_keep_active = 1;
+#else
     spi->dev->pin.cs_keep_active = 1;
+#endif
     SPI_MUTEX_UNLOCK();
 }
 
@@ -279,7 +411,11 @@ void spiSSClear(spi_t * spi)
         return;
     }
     SPI_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32S2
+    spi->dev->misc.cs_keep_active = 0;
+#else
     spi->dev->pin.cs_keep_active = 0;
+#endif
     SPI_MUTEX_UNLOCK();
 }
 
@@ -306,7 +442,11 @@ uint8_t spiGetDataMode(spi_t * spi)
     if(!spi) {
         return 0;
     }
+#if CONFIG_IDF_TARGET_ESP32S2
+    bool idleEdge = spi->dev->misc.ck_idle_edge;
+#else
     bool idleEdge = spi->dev->pin.ck_idle_edge;
+#endif
     bool outEdge = spi->dev->user.ck_out_edge;
     if(idleEdge) {
         if(outEdge) {
@@ -328,20 +468,36 @@ void spiSetDataMode(spi_t * spi, uint8_t dataMode)
     SPI_MUTEX_LOCK();
     switch (dataMode) {
     case SPI_MODE1:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 0;
+#else
         spi->dev->pin.ck_idle_edge = 0;
+#endif
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE2:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 1;
+#else
         spi->dev->pin.ck_idle_edge = 1;
+#endif
         spi->dev->user.ck_out_edge = 1;
         break;
     case SPI_MODE3:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 1;
+#else
         spi->dev->pin.ck_idle_edge = 1;
+#endif
         spi->dev->user.ck_out_edge = 0;
         break;
     case SPI_MODE0:
     default:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 0;
+#else
         spi->dev->pin.ck_idle_edge = 0;
+#endif
         spi->dev->user.ck_out_edge = 0;
         break;
     }
@@ -384,28 +540,39 @@ static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb
     }
 }
 
-void spiStopBus(spi_t * spi)
+static void spiInitBus(spi_t * spi)
 {
-    if(!spi) {
-        return;
-    }
-    SPI_MUTEX_LOCK();
     spi->dev->slave.trans_done = 0;
     spi->dev->slave.slave_mode = 0;
+#if CONFIG_IDF_TARGET_ESP32S2
+    spi->dev->misc.val = 0;
+#else
     spi->dev->pin.val = 0;
+#endif
     spi->dev->user.val = 0;
     spi->dev->user1.val = 0;
     spi->dev->ctrl.val = 0;
     spi->dev->ctrl1.val = 0;
     spi->dev->ctrl2.val = 0;
     spi->dev->clock.val = 0;
-    SPI_MUTEX_UNLOCK();
+}
+
+void spiStopBus(spi_t * spi)
+{
+    if(!spi) {
+        return;
+    }
+    
     removeApbChangeCallback(spi, _on_apb_change);
+    
+    SPI_MUTEX_LOCK();
+    spiInitBus(spi);
+    SPI_MUTEX_UNLOCK();
 }
 
 spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder)
 {
-    if(spi_num > 3){
+    if(spi_num >= SPI_COUNT){
         return NULL;
     }
 
@@ -420,23 +587,32 @@ spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_
     }
 #endif
 
-    if(spi_num == HSPI) {
+#if CONFIG_IDF_TARGET_ESP32S2
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI_CLK_EN);
+    if(spi_num == FSPI) {
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI_RST);
+        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI2_CLK_EN);
-    } else if(spi_num == VSPI) {
+        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI2_RST);
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI_CLK_EN_2);
+    } else if(spi_num == HSPI) {
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI_RST_2);
+        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI3_CLK_EN);
+        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI3_RST);
     } else {
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI_CLK_EN_1);
+        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_SPI_RST_1);
+        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI01_RST);
     }
-
+#else
-    spiStopBus(spi);
+    if(spi_num == HSPI) {
-    spiSetDataMode(spi, dataMode);
+        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI2_CLK_EN);
-    spiSetBitOrder(spi, bitOrder);
+        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI2_RST);
-    spiSetClockDiv(spi, clockDiv);
+    } else if(spi_num == VSPI) {
+        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_SPI3_CLK_EN);
+        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_SPI3_RST);
+    } else {
+        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);
+    }
+#endif
 
     SPI_MUTEX_LOCK();
+    spiInitBus(spi);
     spi->dev->user.usr_mosi = 1;
     spi->dev->user.usr_miso = 1;
     spi->dev->user.doutdin = 1;
@@ -447,6 +623,10 @@ spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_
     }
     SPI_MUTEX_UNLOCK();
 
+    spiSetDataMode(spi, dataMode);
+    spiSetBitOrder(spi, bitOrder);
+    spiSetClockDiv(spi, clockDiv);
+
     addApbChangeCallback(spi, _on_apb_change);
     return spi;
 }
@@ -459,7 +639,12 @@ void spiWaitReady(spi_t * spi)
     while(spi->dev->cmd.usr);
 }
 
-void spiWrite(spi_t * spi, uint32_t *data, uint8_t len)
+#if CONFIG_IDF_TARGET_ESP32S2
+#define usr_mosi_dbitlen usr_mosi_bit_len
+#define usr_miso_dbitlen usr_miso_bit_len
+#endif
+
+void spiWrite(spi_t * spi, const uint32_t *data, uint8_t len)
 {
     if(!spi) {
         return;
@@ -532,17 +717,7 @@ uint8_t spiTransferByte(spi_t * spi, uint8_t data)
     return data;
 }
 
-uint32_t __spiTranslate24(uint32_t data)
+static uint32_t __spiTranslate32(uint32_t data)
-{
-    union {
-        uint32_t l;
-        uint8_t b[4];
-    } out;
-    out.l = data;
-    return out.b[2] | (out.b[1] << 8) | (out.b[0] << 16);
-}
-
-uint32_t __spiTranslate32(uint32_t data)
 {
     union {
         uint32_t l;
@@ -630,7 +805,7 @@ uint32_t spiTransferLong(spi_t * spi, uint32_t data)
     return data;
 }
 
-void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t bytes)
+static void __spiTransferBytes(spi_t * spi, const uint8_t * data, uint8_t * out, uint32_t bytes)
 {
     if(!spi) {
         return;
@@ -671,7 +846,7 @@ void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t byt
     }
 }
 
-void spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t size)
+void spiTransferBytes(spi_t * spi, const uint8_t * data, uint8_t * out, uint32_t size)
 {
     if(!spi) {
         return;
@@ -722,23 +897,39 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
     SPI_MUTEX_LOCK();
     spi->dev->clock.val = clockDiv;
     switch (dataMode) {
-        case SPI_MODE1:
+    case SPI_MODE1:
-            spi->dev->pin.ck_idle_edge = 0;
+#if CONFIG_IDF_TARGET_ESP32S2
-            spi->dev->user.ck_out_edge = 1;
+        spi->dev->misc.ck_idle_edge = 0;
-            break;
+#else
-        case SPI_MODE2:
+        spi->dev->pin.ck_idle_edge = 0;
-            spi->dev->pin.ck_idle_edge = 1;
+#endif
-            spi->dev->user.ck_out_edge = 1;
+        spi->dev->user.ck_out_edge = 1;
-            break;
+        break;
-        case SPI_MODE3:
+    case SPI_MODE2:
-            spi->dev->pin.ck_idle_edge = 1;
+#if CONFIG_IDF_TARGET_ESP32S2
-            spi->dev->user.ck_out_edge = 0;
+        spi->dev->misc.ck_idle_edge = 1;
-            break;
+#else
-        case SPI_MODE0:
+        spi->dev->pin.ck_idle_edge = 1;
-        default:
+#endif
-            spi->dev->pin.ck_idle_edge = 0;
+        spi->dev->user.ck_out_edge = 1;
-            spi->dev->user.ck_out_edge = 0;
+        break;
-            break;
+    case SPI_MODE3:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 1;
+#else
+        spi->dev->pin.ck_idle_edge = 1;
+#endif
+        spi->dev->user.ck_out_edge = 0;
+        break;
+    case SPI_MODE0:
+    default:
+#if CONFIG_IDF_TARGET_ESP32S2
+        spi->dev->misc.ck_idle_edge = 0;
+#else
+        spi->dev->pin.ck_idle_edge = 0;
+#endif
+        spi->dev->user.ck_out_edge = 0;
+        break;
     }
     if (SPI_MSBFIRST == bitOrder) {
         spi->dev->ctrl.wr_bit_order = 0;
@@ -765,7 +956,7 @@ void spiEndTransaction(spi_t * spi)
     SPI_MUTEX_UNLOCK();
 }
 
-void IRAM_ATTR spiWriteByteNL(spi_t * spi, uint8_t data)
+void ARDUINO_ISR_ATTR spiWriteByteNL(spi_t * spi, uint8_t data)
 {
     if(!spi) {
         return;
@@ -791,7 +982,7 @@ uint8_t spiTransferByteNL(spi_t * spi, uint8_t data)
     return data;
 }
 
-void IRAM_ATTR spiWriteShortNL(spi_t * spi, uint16_t data)
+void ARDUINO_ISR_ATTR spiWriteShortNL(spi_t * spi, uint16_t data)
 {
     if(!spi) {
         return;
@@ -826,7 +1017,7 @@ uint16_t spiTransferShortNL(spi_t * spi, uint16_t data)
     return data;
 }
 
-void IRAM_ATTR spiWriteLongNL(spi_t * spi, uint32_t data)
+void ARDUINO_ISR_ATTR spiWriteLongNL(spi_t * spi, uint32_t data)
 {
     if(!spi) {
         return;
@@ -861,7 +1052,7 @@ uint32_t spiTransferLongNL(spi_t * spi, uint32_t data)
     return data;
 }
 
-void spiWriteNL(spi_t * spi, const void * data_in, size_t len){
+void spiWriteNL(spi_t * spi, const void * data_in, uint32_t len){
     size_t longs = len >> 2;
     if(len & 3){
         longs++;
@@ -887,7 +1078,7 @@ void spiWriteNL(spi_t * spi, const void * data_in, size_t len){
     }
 }
 
-void spiTransferBytesNL(spi_t * spi, const void * data_in, uint8_t * data_out, size_t len){
+void spiTransferBytesNL(spi_t * spi, const void * data_in, uint8_t * data_out, uint32_t len){
     if(!spi) {
         return;
     }
@@ -974,7 +1165,7 @@ void spiTransferBitsNL(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits)
     }
 }
 
-void IRAM_ATTR spiWritePixelsNL(spi_t * spi, const void * data_in, size_t len){
+void ARDUINO_ISR_ATTR spiWritePixelsNL(spi_t * spi, const void * data_in, uint32_t len){
     size_t longs = len >> 2;
     if(len & 3){
         longs++;

cores/esp32/esp32-hal-spi.h

@@ -19,6 +19,7 @@
 extern "C" {
 #endif
 
+#include "sdkconfig.h"
 #include <stdint.h>
 #include <stdbool.h>
 
@@ -26,7 +27,9 @@ extern "C" {
 
 #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
 
 // This defines are not representing the real Divider of the ESP32
 // the Defines match to an AVR Arduino on 16MHz for better compatibility
@@ -96,7 +99,7 @@ void spiSetClockDiv(spi_t * spi, uint32_t clockDiv);
 void spiSetDataMode(spi_t * spi, uint8_t dataMode);
 void spiSetBitOrder(spi_t * spi, uint8_t bitOrder);
 
-void spiWrite(spi_t * spi, uint32_t *data, uint8_t len);
+void spiWrite(spi_t * spi, const uint32_t *data, uint8_t len);
 void spiWriteByte(spi_t * spi, uint8_t data);
 void spiWriteWord(spi_t * spi, uint16_t data);
 void spiWriteLong(spi_t * spi, uint32_t data);
@@ -105,7 +108,7 @@ void spiTransfer(spi_t * spi, uint32_t *out, uint8_t len);
 uint8_t spiTransferByte(spi_t * spi, uint8_t data);
 uint16_t spiTransferWord(spi_t * spi, uint16_t data);
 uint32_t spiTransferLong(spi_t * spi, uint32_t data);
-void spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t size);
+void spiTransferBytes(spi_t * spi, const uint8_t * data, uint8_t * out, uint32_t size);
 void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits);
 
 /*
@@ -115,11 +118,11 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
 void spiSimpleTransaction(spi_t * spi);
 void spiEndTransaction(spi_t * spi);
 
-void spiWriteNL(spi_t * spi, const void * data, uint32_t len);
+void spiWriteNL(spi_t * spi, const void * data_in, uint32_t len);
 void spiWriteByteNL(spi_t * spi, uint8_t data);
 void spiWriteShortNL(spi_t * spi, uint16_t data);
 void spiWriteLongNL(spi_t * spi, uint32_t data);
-void spiWritePixelsNL(spi_t * spi, const void * data, uint32_t len);
+void spiWritePixelsNL(spi_t * spi, const void * data_in, uint32_t len);
 
 #define spiTransferNL(spi, data, len) spiTransferBytesNL(spi, data, data, len)
 uint8_t spiTransferByteNL(spi_t * spi, uint8_t data);

cores/esp32/esp32-hal-time.c

@@ -14,6 +14,8 @@
 
 #include "esp32-hal.h"
 #include "lwip/apps/sntp.h"
+//#include "tcpip_adapter.h"
+#include "esp_netif.h"
 
 static void setTimeZone(long offset, int daylight)
 {
@@ -45,6 +47,8 @@ static void setTimeZone(long offset, int daylight)
  * */
 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();
     }
@@ -62,6 +66,8 @@ void configTime(long gmtOffset_sec, int daylightOffset_sec, const char* server1,
  * */
 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();
     }
@@ -76,23 +82,15 @@ void configTzTime(const char* tz, const char* server1, const char* server2, cons
 
 bool getLocalTime(struct tm * info, uint32_t ms)
 {
-    uint32_t count = ms / 10;
+    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;
-    }
-
-    while(count--) {
-        delay(10);
         time(&now);
         localtime_r(&now, info);
         if(info->tm_year > (2016 - 1900)){
             return true;
         }
+        delay(10);
     }
     return false;
 }

cores/esp32/esp32-hal-timer.c

@@ -16,11 +16,27 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/xtensa_api.h"
 #include "freertos/task.h"
-#include "rom/ets_sys.h"
 #include "soc/timer_group_struct.h"
 #include "soc/dport_reg.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"
+#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)
@@ -67,11 +83,18 @@ static hw_timer_t hw_timer[4] = {
 typedef void (*voidFuncPtr)(void);
 static voidFuncPtr __timerInterruptHandlers[4] = {0,0,0,0};
 
-void IRAM_ATTR __timerISR(void * arg){
+void ARDUINO_ISR_ATTR __timerISR(void * arg){
+#if CONFIG_IDF_TARGET_ESP32
     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;
+#else
+    uint32_t s0 = TIMERG0.int_st.val;
+    uint32_t s1 = TIMERG1.int_st.val;
+    TIMERG0.int_clr.val = s0;
+    TIMERG1.int_clr.val = s1;
+#endif
     uint8_t status = (s1 & 3) << 2 | (s0 & 3);
     uint8_t i = 4;
     //restart the timers that should autoreload
@@ -165,6 +188,7 @@ void timerStop(hw_timer_t *timer){
 
 void timerRestart(hw_timer_t *timer){
     timer->dev->config.enable = 0;
+    timer->dev->reload = 1;
     timer->dev->config.enable = 1;
 }
 
@@ -202,15 +226,29 @@ hw_timer_t * timerBegin(uint8_t num, uint16_t divider, bool countUp){
     }
     hw_timer_t * timer = &hw_timer[num];
     if(timer->group) {
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_TIMERGROUP1_CLK_EN);
+    	periph_module_enable(PERIPH_TIMG1_MODULE);
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_TIMERGROUP1_RST);
-        TIMERG1.int_ena.val &= ~BIT(timer->timer);
     } else {
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_TIMERGROUP_CLK_EN);
+    	periph_module_enable(PERIPH_TIMG0_MODULE);
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_TIMERGROUP_RST);
-        TIMERG0.int_ena.val &= ~BIT(timer->timer);
     }
     timer->dev->config.enable = 0;
+    if(timer->group) {
+        TIMERG1.int_ena.val &= ~BIT(timer->timer);
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG1.int_clr_timers.val |= BIT(timer->timer);
+#else
+            TIMERG1.int_clr.val = BIT(timer->timer);
+#endif
+    } else {
+        TIMERG0.int_ena.val &= ~BIT(timer->timer);
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG0.int_clr_timers.val |= BIT(timer->timer);
+#else
+            TIMERG0.int_clr.val = BIT(timer->timer);
+#endif
+    }
+#ifdef TIMER_GROUP_SUPPORTS_XTAL_CLOCK
+    timer->dev->config.use_xtal = 0;
+#endif
     timerSetDivider(timer, divider);
     timerSetCountUp(timer, countUp);
     timerSetAutoReload(timer, false);
@@ -228,6 +266,9 @@ void timerEnd(hw_timer_t *timer){
 }
 
 void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
+	// EDGE DOES NOT WORK CURRENTLY
+	edge = false;
+
     static bool initialized = false;
     static intr_handle_t intr_handle = NULL;
     if(intr_handle){
@@ -239,8 +280,18 @@ void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
         timer->dev->config.alarm_en = 0;
         if(timer->num & 2){
             TIMERG1.int_ena.val &= ~BIT(timer->timer);
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG1.int_clr_timers.val |= BIT(timer->timer);
+#else
+            TIMERG1.int_clr.val = BIT(timer->timer);
+#endif
         } else {
             TIMERG0.int_ena.val &= ~BIT(timer->timer);
+#if CONFIG_IDF_TARGET_ESP32
+            TIMERG0.int_clr_timers.val |= BIT(timer->timer);
+#else
+            TIMERG0.int_clr.val = BIT(timer->timer);
+#endif
         }
         __timerInterruptHandlers[timer->num] = NULL;
     } else {
@@ -263,7 +314,7 @@ void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
         }
         if(!initialized){
             initialized = true;
-            esp_intr_alloc(intr_source, (int)(ESP_INTR_FLAG_IRAM|ESP_INTR_FLAG_LOWMED|ESP_INTR_FLAG_EDGE), __timerISR, NULL, &intr_handle);
+            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));
         }

cores/esp32/esp32-hal-tinyusb.c

@@ -0,0 +1,702 @@
+
+#include "sdkconfig.h"
+#if CONFIG_USB_ENABLED
+#include <stdlib.h>
+
+#include "esp_log.h"
+
+#include "soc/soc.h"
+#include "soc/efuse_reg.h"
+#include "soc/rtc_cntl_reg.h"
+#include "soc/usb_struct.h"
+#include "soc/usb_reg.h"
+#include "soc/usb_wrap_reg.h"
+#include "soc/usb_wrap_struct.h"
+#include "soc/periph_defs.h"
+#include "soc/timer_group_struct.h"
+#include "soc/system_reg.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "driver/gpio.h"
+#include "driver/periph_ctrl.h"
+
+#include "esp_efuse.h"
+#include "esp_efuse_table.h"
+
+#include "tinyusb.h"
+#include "esp32-hal.h"
+
+#include "esp32-hal-tinyusb.h"
+#include "esp32s2/rom/usb/usb_persist.h"
+
+typedef char tusb_str_t[127];
+
+static bool WEBUSB_ENABLED                = false;
+
+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 uint8_t USB_DEVICE_ATTRIBUTES     = 0;
+static uint16_t USB_DEVICE_POWER         = 0;
+
+/*
+ * Device Descriptor
+ * */
+static tusb_desc_device_t tinyusb_device_descriptor = {
+        .bLength = sizeof(tusb_desc_device_t),
+        .bDescriptorType = TUSB_DESC_DEVICE,
+        .bcdUSB = 0,
+        .bDeviceClass = 0,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = CFG_TUD_ENDOINT0_SIZE,
+
+        .idVendor = 0,
+        .idProduct = 0,
+        .bcdDevice = 0,
+
+        .iManufacturer = 0x01,
+        .iProduct = 0x02,
+        .iSerialNumber = 0x03,
+
+        .bNumConfigurations = 0x01
+};
+
+/*
+ * String Descriptors
+ * */
+#define MAX_STRING_DESCRIPTORS 20
+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_MANUFACTURER,// 1: Manufacturer
+        USB_DEVICE_PRODUCT,     // 2: Product
+        USB_DEVICE_SERIAL,      // 3: Serials, should use chip ID
+};
+
+
+/* Microsoft OS 2.0 registry property descriptor
+Per MS requirements https://msdn.microsoft.com/en-us/library/windows/hardware/hh450799(v=vs.85).aspx
+device should create DeviceInterfaceGUIDs. It can be done by driver and
+in case of real PnP solution device should expose MS "Microsoft OS 2.0
+registry property descriptor". Such descriptor can insert any record
+into Windows registry per device/configuration/interface. In our case it
+will insert "DeviceInterfaceGUIDs" multistring property.
+
+GUID is freshly generated and should be OK to use.
+
+https://developers.google.com/web/fundamentals/native-hardware/build-for-webusb/
+(Section Microsoft OS compatibility descriptors)
+ */
+
+#define MS_OS_20_DESC_LEN  0xB2
+
+static uint8_t const tinyusb_ms_os_20_descriptor[] =
+{
+        // Set header: length, type, windows version, total length
+        U16_TO_U8S_LE(0x000A), U16_TO_U8S_LE(MS_OS_20_SET_HEADER_DESCRIPTOR), U32_TO_U8S_LE(0x06030000), U16_TO_U8S_LE(MS_OS_20_DESC_LEN),
+
+        // Configuration subset header: length, type, configuration index, reserved, configuration total length
+        U16_TO_U8S_LE(0x0008), U16_TO_U8S_LE(MS_OS_20_SUBSET_HEADER_CONFIGURATION), 0, 0, U16_TO_U8S_LE(MS_OS_20_DESC_LEN-0x0A),
+
+        // Function Subset header: length, type, first interface, reserved, subset length
+        U16_TO_U8S_LE(0x0008), U16_TO_U8S_LE(MS_OS_20_SUBSET_HEADER_FUNCTION), 0, 0, U16_TO_U8S_LE(MS_OS_20_DESC_LEN-0x0A-0x08),
+
+        // MS OS 2.0 Compatible ID descriptor: length, type, compatible ID, sub compatible ID
+        U16_TO_U8S_LE(0x0014), U16_TO_U8S_LE(MS_OS_20_FEATURE_COMPATBLE_ID), 'W', 'I', 'N', 'U', 'S', 'B', 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // sub-compatible
+
+        // MS OS 2.0 Registry property descriptor: length, type
+        U16_TO_U8S_LE(MS_OS_20_DESC_LEN-0x0A-0x08-0x08-0x14), U16_TO_U8S_LE(MS_OS_20_FEATURE_REG_PROPERTY),
+        U16_TO_U8S_LE(0x0007), U16_TO_U8S_LE(0x002A), // wPropertyDataType, wPropertyNameLength and PropertyName "DeviceInterfaceGUIDs\0" in UTF-16
+        'D', 0x00, 'e', 0x00, 'v', 0x00, 'i', 0x00, 'c', 0x00, 'e', 0x00, 'I', 0x00, 'n', 0x00, 't', 0x00, 'e', 0x00,
+        'r', 0x00, 'f', 0x00, 'a', 0x00, 'c', 0x00, 'e', 0x00, 'G', 0x00, 'U', 0x00, 'I', 0x00, 'D', 0x00, 's', 0x00, 0x00, 0x00,
+        U16_TO_U8S_LE(0x0050), // wPropertyDataLength
+        //bPropertyData: “{975F44D9-0D08-43FD-8B3E-127CA8AFFF9D}”.
+        '{', 0x00, '9', 0x00, '7', 0x00, '5', 0x00, 'F', 0x00, '4', 0x00, '4', 0x00, 'D', 0x00, '9', 0x00, '-', 0x00,
+        '0', 0x00, 'D', 0x00, '0', 0x00, '8', 0x00, '-', 0x00, '4', 0x00, '3', 0x00, 'F', 0x00, 'D', 0x00, '-', 0x00,
+        '8', 0x00, 'B', 0x00, '3', 0x00, 'E', 0x00, '-', 0x00, '1', 0x00, '2', 0x00, '7', 0x00, 'C', 0x00, 'A', 0x00,
+        '8', 0x00, 'A', 0x00, 'F', 0x00, 'F', 0x00, 'F', 0x00, '9', 0x00, 'D', 0x00, '}', 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+TU_VERIFY_STATIC(sizeof(tinyusb_ms_os_20_descriptor) == MS_OS_20_DESC_LEN, "Incorrect size");
+
+
+/*
+ * BOS Descriptor (required for webUSB)
+ * */
+#define BOS_TOTAL_LEN      (TUD_BOS_DESC_LEN + TUD_BOS_WEBUSB_DESC_LEN + TUD_BOS_MICROSOFT_OS_DESC_LEN)
+
+enum {
+    VENDOR_REQUEST_WEBUSB = 1,
+    VENDOR_REQUEST_MICROSOFT = 2
+};
+
+static uint8_t const tinyusb_bos_descriptor[] = {
+        // total length, number of device caps
+        TUD_BOS_DESCRIPTOR(BOS_TOTAL_LEN, 2),
+
+        // Vendor Code, iLandingPage
+        TUD_BOS_WEBUSB_DESCRIPTOR(VENDOR_REQUEST_WEBUSB, 1),
+
+        // Microsoft OS 2.0 descriptor
+        TUD_BOS_MS_OS_20_DESCRIPTOR(MS_OS_20_DESC_LEN, VENDOR_REQUEST_MICROSOFT)
+};
+
+/*
+ * URL Descriptor (required for webUSB)
+ * */
+typedef struct TU_ATTR_PACKED {
+  uint8_t bLength;
+  uint8_t bDescriptorType;
+  uint8_t bScheme;
+  char    url[127];
+} tinyusb_desc_webusb_url_t;
+
+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: ""
+        .url             = ""
+};
+
+/*
+ * Configuration Descriptor
+ * */
+
+static tinyusb_descriptor_cb_t tinyusb_loaded_interfaces_callbacks[USB_INTERFACE_MAX];
+static uint32_t tinyusb_loaded_interfaces_mask = 0;
+static uint8_t tinyusb_loaded_interfaces_num = 0;
+static uint16_t tinyusb_config_descriptor_len = 0;
+static uint8_t * tinyusb_config_descriptor = NULL;
+
+/*
+ * Endpoint Usage Tracking
+ * */
+typedef union {
+        struct {
+                uint32_t in:16;
+                uint32_t out:16;
+        };
+        uint32_t val;
+} tinyusb_endpoints_usage_t;
+
+static tinyusb_endpoints_usage_t tinyusb_endpoints;
+
+
+/*
+ * TinyUSB Callbacks
+ * */
+
+/**
+ * @brief Invoked when received GET CONFIGURATION DESCRIPTOR.
+ */
+uint8_t const *tud_descriptor_configuration_cb(uint8_t index)
+{
+    //log_d("%u", index);
+    return tinyusb_config_descriptor;
+}
+
+/**
+ * @brief Invoked when received GET DEVICE DESCRIPTOR.
+ */
+uint8_t const *tud_descriptor_device_cb(void)
+{
+    //log_d("");
+    return (uint8_t const *)&tinyusb_device_descriptor;
+}
+
+/**
+ * @brief Invoked when received GET STRING DESCRIPTOR request.
+ */
+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];
+    uint8_t chr_count;
+
+    if (index == 0) {
+        memcpy(&_desc_str[1], tinyusb_string_descriptor[0], 2);
+        chr_count = 1;
+    } else {
+        // Convert ASCII string into UTF-16
+        if (index >= tinyusb_string_descriptor_len) {
+            return NULL;
+        }
+        const char *str = tinyusb_string_descriptor[index];
+        // Cap at max char
+        chr_count = strlen(str);
+        if (chr_count > 126) {
+            chr_count = 126;
+        }
+        for (uint8_t i = 0; i < chr_count; i++) {
+            _desc_str[1 + i] = str[i];
+        }
+    }
+
+    // first byte is len, second byte is string type
+    _desc_str[0] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+
+    return _desc_str;
+}
+
+/**
+ * @brief Invoked when received GET BOS DESCRIPTOR request.
+ */
+uint8_t const * tud_descriptor_bos_cb(void)
+{
+    //log_d("");
+    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; }
+
+/**
+ * @brief Handle WebUSB and Vendor requests.
+ */
+bool tud_vendor_control_request_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))){
+        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);
+    }
+    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;
+}
+
+/*
+ * 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){}
+#endif
+#if CFG_TUD_MSC
+__attribute__ ((weak)) bool tud_msc_test_unit_ready_cb(uint8_t lun){return false;}
+__attribute__ ((weak)) void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16], uint8_t product_rev[4]){}
+__attribute__ ((weak)) void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_size){}
+__attribute__ ((weak)) int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize){return -1;}
+__attribute__ ((weak)) int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize){return -1;}
+__attribute__ ((weak)) int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize){return -1;}
+#endif
+
+
+/*
+ * Private API
+ * */
+static bool usb_persist_enabled = false;
+static restart_type_t usb_persist_mode = RESTART_NO_PERSIST;
+
+static bool tinyusb_reserve_in_endpoint(uint8_t endpoint){
+    if(endpoint > 6 || (tinyusb_endpoints.in & BIT(endpoint)) != 0){
+        return false;
+    }
+    tinyusb_endpoints.in |= BIT(endpoint);
+    return true;
+}
+
+static bool tinyusb_reserve_out_endpoint(uint8_t endpoint){
+    if(endpoint > 6 || (tinyusb_endpoints.out & BIT(endpoint)) != 0){
+        return false;
+    }
+    tinyusb_endpoints.out |= BIT(endpoint);
+    return true;
+}
+
+static bool tinyusb_has_available_fifos(void){
+    uint8_t max_endpoints = 4, active_endpoints = 0;
+    if (tinyusb_loaded_interfaces_mask & BIT(USB_INTERFACE_CDC)) {
+        max_endpoints = 5; //CDC endpoint 0x85 is actually not linked to FIFO and not used
+    }
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.in & BIT(i)) != 0){
+            active_endpoints++;
+        }
+    }
+
+    return active_endpoints < max_endpoints;
+}
+
+static uint16_t tinyusb_load_descriptor(tinyusb_interface_t interface, uint8_t * dst, uint8_t * itf)
+{
+    if(tinyusb_loaded_interfaces_callbacks[interface]){
+        return tinyusb_loaded_interfaces_callbacks[interface](dst, itf);
+    }
+    return 0;
+}
+
+static bool tinyusb_load_enabled_interfaces(){
+    tinyusb_config_descriptor_len += TUD_CONFIG_DESC_LEN;
+    tinyusb_config_descriptor = (uint8_t *)malloc(tinyusb_config_descriptor_len);
+    if (tinyusb_config_descriptor == NULL) {
+        log_e("Descriptor Malloc Failed");
+        return false;
+    }
+    uint8_t * dst = tinyusb_config_descriptor + TUD_CONFIG_DESC_LEN;
+
+    for(int i=0; i<USB_INTERFACE_MAX; i++){
+        if (tinyusb_loaded_interfaces_mask & (1U << i)) {
+            uint16_t len = tinyusb_load_descriptor((tinyusb_interface_t)i, dst, &tinyusb_loaded_interfaces_num);
+            if (!len) {
+                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;
+            }
+        }
+    }
+    uint8_t str_index = tinyusb_add_string_descriptor("TinyUSB Device");
+    uint8_t descriptor[TUD_CONFIG_DESC_LEN] = {
+            //num configs, interface count, string index, total length, attribute, power in mA
+            TUD_CONFIG_DESCRIPTOR(1, tinyusb_loaded_interfaces_num, str_index, tinyusb_config_descriptor_len, USB_DEVICE_ATTRIBUTES, USB_DEVICE_POWER)
+    };
+    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");
+    }
+    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;
+}
+
+static inline char nibble_to_hex_char(uint8_t b)
+{
+    if (b < 0xa) {
+        return '0' + b;
+    } else {
+        return 'a' + b - 0xa;
+    }
+}
+
+static void set_usb_serial_num(void)
+{
+    /* Get the MAC address */
+    const uint32_t mac0 = REG_GET_FIELD(EFUSE_RD_MAC_SPI_SYS_0_REG, EFUSE_MAC_0);
+    const uint32_t mac1 = REG_GET_FIELD(EFUSE_RD_MAC_SPI_SYS_1_REG, EFUSE_MAC_1);
+    uint8_t mac_bytes[6];
+    memcpy(mac_bytes, &mac0, 4);
+    memcpy(mac_bytes + 4, &mac1, 2);
+
+    /* Convert to UTF16 string */
+    uint8_t* srl = (uint8_t*)USB_DEVICE_SERIAL;
+    for (int i = 0; i < 6; ++i) {
+        uint8_t b = mac_bytes[5 - i]; /* printing from the MSB */
+        if (i) {
+            *srl++ = ':';
+        }
+        *srl++ = nibble_to_hex_char(b >> 4);
+        *srl++ = nibble_to_hex_char(b & 0xf);
+    }
+    *srl++ = '\0';
+}
+
+static void tinyusb_apply_device_config(tinyusb_device_config_t *config){
+    if(config->product_name){
+        snprintf(USB_DEVICE_PRODUCT, 126, "%s", config->product_name);
+    }
+    
+    if(config->manufacturer_name){
+        snprintf(USB_DEVICE_MANUFACTURER, 126, "%s", config->manufacturer_name);
+    }
+    
+    if(config->serial_number && config->serial_number[0]){
+        snprintf(USB_DEVICE_SERIAL, 126, "%s", config->serial_number);
+    } else {
+        set_usb_serial_num();
+    }
+    
+    if(config->webusb_url){
+        snprintf(WEBUSB_URL, 126, "%s", config->webusb_url);
+    }
+
+    WEBUSB_ENABLED            = config->webusb_enabled;
+    USB_DEVICE_ATTRIBUTES     = config->usb_attributes;
+    USB_DEVICE_POWER          = config->usb_power_ma;
+    
+    tinyusb_device_descriptor.bcdUSB = config->usb_version;
+    tinyusb_device_descriptor.idVendor = config->vid;
+    tinyusb_device_descriptor.idProduct = config->pid;
+    tinyusb_device_descriptor.bcdDevice = config->fw_version;
+    tinyusb_device_descriptor.bDeviceClass = config->usb_class;
+    tinyusb_device_descriptor.bDeviceSubClass = config->usb_subclass;
+    tinyusb_device_descriptor.bDeviceProtocol = config->usb_protocol;
+}
+
+static void IRAM_ATTR usb_persist_shutdown_handler(void)
+{
+    if(usb_persist_mode != RESTART_NO_PERSIST){
+        if (usb_persist_enabled) {
+            REG_SET_BIT(RTC_CNTL_USB_CONF_REG, RTC_CNTL_IO_MUX_RESET_DISABLE);
+            REG_SET_BIT(RTC_CNTL_USB_CONF_REG, RTC_CNTL_USB_RESET_DISABLE);
+        }
+        if (usb_persist_mode == RESTART_BOOTLOADER) {
+            //USB CDC Download
+            if (usb_persist_enabled) {
+                USB_WRAP.date.val = USBDC_PERSIST_ENA;
+            }
+            REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
+            periph_module_disable(PERIPH_TIMG1_MODULE);
+        } else if (usb_persist_mode == RESTART_BOOTLOADER_DFU) {
+            //DFU Download
+            USB_WRAP.date.val = USBDC_BOOT_DFU;
+            REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
+            periph_module_disable(PERIPH_TIMG0_MODULE);
+            periph_module_disable(PERIPH_TIMG1_MODULE);
+        } else if (usb_persist_enabled) {
+            //USB Persist reboot
+            USB_WRAP.date.val = USBDC_PERSIST_ENA;
+        }
+        SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_SW_PROCPU_RST);
+    }
+}
+
+// USB Device Driver task
+// This top level thread processes all usb events and invokes callbacks
+static void usb_device_task(void *param) {
+    (void)param;
+    while(1) tud_task(); // RTOS forever loop
+}
+
+/*
+ * PUBLIC API
+ * */
+
+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);
+        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);
+    return ESP_OK;
+}
+
+esp_err_t tinyusb_init(tinyusb_device_config_t *config) {
+    static bool initialized = false;
+    if(initialized){
+        return ESP_OK;
+    }
+    initialized = true;
+    
+    tinyusb_endpoints.val = 0;
+    tinyusb_apply_device_config(config);
+    if (!tinyusb_load_enabled_interfaces()) {
+        initialized = false;
+        return ESP_FAIL;
+    }
+
+    bool usb_did_persist = (USB_WRAP.date.val == USBDC_PERSIST_ENA);
+
+    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 {
+        // Reset USB module
+        periph_module_reset(PERIPH_USB_MODULE);
+        periph_module_enable(PERIPH_USB_MODULE);
+    }
+
+    if (usb_persist_enabled && esp_register_shutdown_handler(usb_persist_shutdown_handler) != ESP_OK) {
+        initialized = false;
+        return ESP_FAIL;
+    }
+
+    tinyusb_config_t tusb_cfg = {
+            .external_phy = false // In the most cases you need to use a `false` value
+    };
+    esp_err_t err = tinyusb_driver_install(&tusb_cfg);
+    if (err != ESP_OK) {
+        initialized = false;
+        return err;
+    }
+    xTaskCreate(usb_device_task, "usbd", 4096, NULL, configMAX_PRIORITIES - 1, NULL);
+    return err;
+}
+
+void usb_persist_restart(restart_type_t mode)
+{
+    if (usb_persist_enabled && mode < RESTART_TYPE_MAX) {
+        usb_persist_mode = mode;
+        esp_restart();
+    } else {
+        log_e("Persistence is not enabled");
+    }
+}
+
+uint8_t tinyusb_add_string_descriptor(const char * str){
+    if(str == NULL || tinyusb_string_descriptor_len >= MAX_STRING_DESCRIPTORS){
+        return 0;
+    }
+    uint8_t index = tinyusb_string_descriptor_len;
+    tinyusb_string_descriptor[tinyusb_string_descriptor_len++] = (char*)str;
+    return index;
+}
+
+uint8_t tinyusb_get_free_duplex_endpoint(void){
+    if(!tinyusb_has_available_fifos()){
+        log_e("No available IN endpoints");
+        return 0;
+    }
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.in & BIT(i)) == 0 && (tinyusb_endpoints.out & BIT(i)) == 0){
+            tinyusb_endpoints.in |= BIT(i);
+            tinyusb_endpoints.out |= BIT(i);
+            return i;
+        }
+    }
+    log_e("No available duplex endpoints");
+    return 0;
+}
+
+uint8_t tinyusb_get_free_in_endpoint(void){
+    if(!tinyusb_has_available_fifos()){
+        log_e("No available IN endpoints");
+        return 0;
+    }
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.in & BIT(i)) == 0 && (tinyusb_endpoints.out & BIT(i)) != 0){
+            tinyusb_endpoints.in |= BIT(i);
+            return i;
+        }
+    }
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.in & BIT(i)) == 0){
+            tinyusb_endpoints.in |= BIT(i);
+            return i;
+        }
+    }
+    return 0;
+}
+
+uint8_t tinyusb_get_free_out_endpoint(void){
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.out & BIT(i)) == 0 && (tinyusb_endpoints.in & BIT(i)) != 0){
+            tinyusb_endpoints.out |= BIT(i);
+            return i;
+        }
+    }
+    for(uint8_t i=1; i<7; i++){
+        if((tinyusb_endpoints.out & BIT(i)) == 0){
+            tinyusb_endpoints.out |= BIT(i);
+            return i;
+        }
+    }
+    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 */

cores/esp32/esp32-hal-tinyusb.h

@@ -0,0 +1,103 @@
+// 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 "esp32-hal.h"
+
+#if CONFIG_IDF_TARGET_ESP32S2
+#if CONFIG_USB_ENABLED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "tinyusb.h"
+
+typedef struct {
+        uint16_t vid;
+        uint16_t pid;
+        const char * product_name;
+        const char * manufacturer_name;
+        const char * serial_number;
+        uint16_t fw_version;
+        
+        uint16_t usb_version;
+        uint8_t usb_class;
+        uint8_t usb_subclass;
+        uint8_t usb_protocol;
+        uint8_t usb_attributes;
+        uint16_t usb_power_ma;
+        
+        bool webusb_enabled;
+        const char * webusb_url;
+} tinyusb_device_config_t;
+
+#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,                        \
+        .usb_version = 0x0200,                                          \
+        .usb_class = TUSB_CLASS_MISC,                                   \
+        .usb_subclass = MISC_SUBCLASS_COMMON,                           \
+        .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"   \
+}
+
+esp_err_t tinyusb_init(tinyusb_device_config_t *config);
+
+/*
+ * USB Persistence API
+ * */
+typedef enum {
+    RESTART_NO_PERSIST,
+    RESTART_PERSIST,
+    RESTART_BOOTLOADER,
+    RESTART_BOOTLOADER_DFU,
+    RESTART_TYPE_MAX
+} restart_type_t;
+
+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_DFU,
+    USB_INTERFACE_HID,
+    USB_INTERFACE_VENDOR,
+    USB_INTERFACE_MSC,
+    USB_INTERFACE_MIDI,
+    USB_INTERFACE_CUSTOM,
+    USB_INTERFACE_MAX
+} tinyusb_interface_t;
+
+typedef uint16_t (*tinyusb_descriptor_cb_t)(uint8_t * dst, uint8_t * itf);
+
+esp_err_t tinyusb_enable_interface(tinyusb_interface_t interface, uint16_t descriptor_len, tinyusb_descriptor_cb_t cb);
+uint8_t tinyusb_add_string_descriptor(const char * str);
+uint8_t tinyusb_get_free_duplex_endpoint(void);
+uint8_t tinyusb_get_free_in_endpoint(void);
+uint8_t tinyusb_get_free_out_endpoint(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_USB_ENABLED */
+#endif /* CONFIG_IDF_TARGET_ESP32S2 */

cores/esp32/esp32-hal-touch.c

@@ -15,12 +15,29 @@
 #include "esp32-hal-touch.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.h"
 #include "soc/rtc_io_reg.h"
 #include "soc/rtc_cntl_reg.h"
 #include "soc/sens_reg.h"
+#include "soc/sens_struct.h"
+#include "driver/touch_sensor.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"
+#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
 
 static uint16_t __touchSleepCycles = 0x1000;
 static uint16_t __touchMeasureCycles = 0x1000;
@@ -29,8 +46,9 @@ typedef void (*voidFuncPtr)(void);
 static voidFuncPtr __touchInterruptHandlers[10] = {0,};
 static intr_handle_t touch_intr_handle = NULL;
 
-void IRAM_ATTR __touchISR(void * arg)
+void ARDUINO_ISR_ATTR __touchISR(void * arg)
 {
+#if CONFIG_IDF_TARGET_ESP32
     uint32_t pad_intr = READ_PERI_REG(SENS_SAR_TOUCH_CTRL2_REG) & 0x3ff;
     uint32_t rtc_intr = READ_PERI_REG(RTC_CNTL_INT_ST_REG);
     uint8_t i = 0;
@@ -47,16 +65,21 @@ void IRAM_ATTR __touchISR(void * arg)
             }
         }
     }
+#endif
 }
 
 void __touchSetCycles(uint16_t measure, uint16_t sleep)
 {
     __touchSleepCycles = sleep;
     __touchMeasureCycles = measure;
+#if CONFIG_IDF_TARGET_ESP32
     //Touch pad SleepCycle Time
     SET_PERI_REG_BITS(SENS_SAR_TOUCH_CTRL2_REG, SENS_TOUCH_SLEEP_CYCLES, __touchSleepCycles, SENS_TOUCH_SLEEP_CYCLES_S);
     //Touch Pad Measure Time
     SET_PERI_REG_BITS(SENS_SAR_TOUCH_CTRL1_REG, SENS_TOUCH_MEAS_DELAY, __touchMeasureCycles, SENS_TOUCH_MEAS_DELAY_S);
+#else
+    touch_pad_set_meas_time(sleep, measure);
+#endif
 }
 
 void __touchInit()
@@ -66,15 +89,27 @@ void __touchInit()
         return;
     }
     initialized = true;
+#if CONFIG_IDF_TARGET_ESP32
     SET_PERI_REG_BITS(RTC_IO_TOUCH_CFG_REG, RTC_IO_TOUCH_XPD_BIAS, 1, RTC_IO_TOUCH_XPD_BIAS_S);
     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);
-    esp_intr_alloc(ETS_RTC_CORE_INTR_SOURCE, (int)ESP_INTR_FLAG_IRAM, __touchISR, NULL, &touch_intr_handle);
+#else
+    touch_pad_init();
+    touch_pad_set_voltage(TOUCH_HVOLT_2V7, TOUCH_LVOLT_0V5, TOUCH_HVOLT_ATTEN_0V5);
+    touch_pad_set_idle_channel_connect(TOUCH_PAD_CONN_GND);
+    __touchSetCycles(__touchMeasureCycles, __touchSleepCycles);
+    touch_pad_denoise_t denoise = {
+        .grade = TOUCH_PAD_DENOISE_BIT4,
+        .cap_level = TOUCH_PAD_DENOISE_CAP_L4,
+    };
+    touch_pad_denoise_set_config(&denoise);
+    touch_pad_denoise_enable();
+    touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
+    touch_pad_fsm_start();
+#endif
 }
 
 uint16_t __touchRead(uint8_t pin)
@@ -88,6 +123,7 @@ uint16_t __touchRead(uint8_t pin)
 
     __touchInit();
 
+#if CONFIG_IDF_TARGET_ESP32
     uint32_t v0 = READ_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG);
     //Disable Intr & enable touch pad
     WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG,
@@ -119,6 +155,25 @@ uint16_t __touchRead(uint8_t pin)
     //restore previous value
     WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG, v0);
     return touch_value;
+#else
+    static uint32_t chan_mask = 0;
+    uint32_t value = 0;
+    if((chan_mask & (1 << pad)) == 0){
+        if(touch_pad_set_thresh((touch_pad_t)pad, TOUCH_PAD_THRESHOLD_MAX) != ESP_OK){
+        	log_e("touch_pad_set_thresh failed");
+        } else if(touch_pad_config((touch_pad_t)pad) != ESP_OK){
+        	log_e("touch_pad_config failed");
+        } else {
+        	chan_mask |= (1 << pad);
+        }
+    }
+    if((chan_mask & (1 << pad)) != 0) {
+        if(touch_pad_read_raw_data((touch_pad_t)pad, &value) != ESP_OK){
+        	log_e("touch_pad_read_raw_data failed");
+        }
+    }
+    return value;
+#endif
 }
 
 void __touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t threshold)
@@ -134,6 +189,7 @@ void __touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t thresh
 
     __touchInterruptHandlers[pad] = userFunc;
 
+#if CONFIG_IDF_TARGET_ESP32
     //clear touch force ,select the Touch mode is Timer
     CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL2_REG, SENS_TOUCH_START_EN_M|SENS_TOUCH_START_FORCE_M);
 
@@ -161,6 +217,9 @@ void __touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t thresh
                       (1 << (pad + SENS_TOUCH_PAD_WORKEN_S)) | \
                       (1 << (pad + SENS_TOUCH_PAD_OUTEN2_S)) | \
                       (1 << (pad + SENS_TOUCH_PAD_OUTEN1_S)));
+#else
+
+#endif
 }
 
 extern uint16_t touchRead(uint8_t pin) __attribute__ ((weak, alias("__touchRead")));

cores/esp32/esp32-hal-uart.c

@@ -18,10 +18,7 @@
 #include "freertos/task.h"
 #include "freertos/queue.h"
 #include "freertos/semphr.h"
-#include "rom/ets_sys.h"
 #include "esp_attr.h"
-#include "esp_intr.h"
-#include "rom/uart.h"
 #include "soc/uart_reg.h"
 #include "soc/uart_struct.h"
 #include "soc/io_mux_reg.h"
@@ -30,10 +27,37 @@
 #include "soc/rtc.h"
 #include "esp_intr_alloc.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/uart.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/ets_sys.h"
+#include "esp32s2/rom/uart.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 "rom/uart.h"
+#include "esp_intr.h"
+#endif
+
+#if CONFIG_IDF_TARGET_ESP32S2
+#define UART_PORTS_NUM 2
+#define UART_REG_BASE(u)    ((u==0)?DR_REG_UART_BASE:(      (u==1)?DR_REG_UART1_BASE:0))
+#define UART_RXD_IDX(u)     ((u==0)?U0RXD_IN_IDX:(          (u==1)?U1RXD_IN_IDX:0))
+#define UART_TXD_IDX(u)     ((u==0)?U0TXD_OUT_IDX:(         (u==1)?U1TXD_OUT_IDX:0))
+#define UART_INTR_SOURCE(u) ((u==0)?ETS_UART0_INTR_SOURCE:( (u==1)?ETS_UART1_INTR_SOURCE:0))
+#else
+#define UART_PORTS_NUM 3
 #define UART_REG_BASE(u)    ((u==0)?DR_REG_UART_BASE:(      (u==1)?DR_REG_UART1_BASE:(    (u==2)?DR_REG_UART2_BASE:0)))
 #define UART_RXD_IDX(u)     ((u==0)?U0RXD_IN_IDX:(          (u==1)?U1RXD_IN_IDX:(         (u==2)?U2RXD_IN_IDX:0)))
 #define UART_TXD_IDX(u)     ((u==0)?U0TXD_OUT_IDX:(         (u==1)?U1TXD_OUT_IDX:(        (u==2)?U2TXD_OUT_IDX:0)))
 #define UART_INTR_SOURCE(u) ((u==0)?ETS_UART0_INTR_SOURCE:( (u==1)?ETS_UART1_INTR_SOURCE:((u==2)?ETS_UART2_INTR_SOURCE:0)))
+#endif
 
 static int s_uart_debug_nr = 0;
 
@@ -51,31 +75,35 @@ struct uart_struct_t {
 #define UART_MUTEX_LOCK()
 #define UART_MUTEX_UNLOCK()
 
-static uart_t _uart_bus_array[3] = {
+static uart_t _uart_bus_array[] = {
-    {(volatile uart_dev_t *)(DR_REG_UART_BASE), 0, NULL, NULL},
+    {&UART0, 0, NULL, NULL},
-    {(volatile uart_dev_t *)(DR_REG_UART1_BASE), 1, NULL, NULL},
+    {&UART1, 1, NULL, NULL},
-    {(volatile uart_dev_t *)(DR_REG_UART2_BASE), 2, NULL, NULL}
+#if CONFIG_IDF_TARGET_ESP32
+    {&UART2, 2, NULL, NULL}
+#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[3] = {
+static uart_t _uart_bus_array[] = {
-    {(volatile uart_dev_t *)(DR_REG_UART_BASE), NULL, 0, NULL, NULL},
+    {&UART0, NULL, 0, NULL, NULL},
-    {(volatile uart_dev_t *)(DR_REG_UART1_BASE), NULL, 1, NULL, NULL},
+    {&UART1, NULL, 1, NULL, NULL},
-    {(volatile uart_dev_t *)(DR_REG_UART2_BASE), NULL, 2, NULL, NULL}
+#if CONFIG_IDF_TARGET_ESP32
+    {&UART2, NULL, 2, NULL, NULL}
+#endif
 };
 #endif
 
 static void uart_on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb);
 
-static void IRAM_ATTR _uart_isr(void *arg)
+static void ARDUINO_ISR_ATTR _uart_isr(void *arg)
 {
     uint8_t i, c;
     BaseType_t xHigherPriorityTaskWoken;
     uart_t* uart;
 
-    for(i=0;i<3;i++){
+    for(i=0;i<UART_PORTS_NUM;i++){
         uart = &_uart_bus_array[i];
         if(uart->intr_handle == NULL){
             continue;
@@ -83,9 +111,15 @@ static void IRAM_ATTR _uart_isr(void *arg)
         uart->dev->int_clr.rxfifo_full = 1;
         uart->dev->int_clr.frm_err = 1;
         uart->dev->int_clr.rxfifo_tout = 1;
+#if CONFIG_IDF_TARGET_ESP32
         while(uart->dev->status.rxfifo_cnt || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
             c = uart->dev->fifo.rw_byte;
-            if(uart->queue != NULL && !xQueueIsQueueFullFromISR(uart->queue)) {
+#else
+        uint32_t fifo_reg = UART_FIFO_AHB_REG(i);
+        while(uart->dev->status.rxfifo_cnt) {
+        	c = ESP_REG(fifo_reg);
+#endif
+            if(uart->queue != NULL)  {
                 xQueueSendFromISR(uart->queue, &c, &xHigherPriorityTaskWoken);
             }
         }
@@ -100,14 +134,18 @@ void uartEnableInterrupt(uart_t* uart)
 {
     UART_MUTEX_LOCK();
     uart->dev->conf1.rxfifo_full_thrhd = 112;
+#if CONFIG_IDF_TARGET_ESP32
     uart->dev->conf1.rx_tout_thrhd = 2;
+#else
+    uart->dev->mem_conf.rx_tout_thrhd = 2;
+#endif
     uart->dev->conf1.rx_tout_en = 1;
     uart->dev->int_ena.rxfifo_full = 1;
     uart->dev->int_ena.frm_err = 1;
     uart->dev->int_ena.rxfifo_tout = 1;
     uart->dev->int_clr.val = 0xffffffff;
 
-    esp_intr_alloc(UART_INTR_SOURCE(uart->num), (int)ESP_INTR_FLAG_IRAM, _uart_isr, NULL, &uart->intr_handle);
+    esp_intr_alloc(UART_INTR_SOURCE(uart->num), (int)ARDUINO_ISR_FLAG, _uart_isr, NULL, &uart->intr_handle);
     UART_MUTEX_UNLOCK();
 }
 
@@ -143,7 +181,7 @@ void uartDetachTx(uart_t* uart)
 
 void uartAttachRx(uart_t* uart, uint8_t rxPin, bool inverted)
 {
-    if(uart == NULL || rxPin > 39) {
+    if(uart == NULL || rxPin >= GPIO_PIN_COUNT) {
         return;
     }
     pinMode(rxPin, INPUT);
@@ -153,7 +191,7 @@ void uartAttachRx(uart_t* uart, uint8_t rxPin, bool inverted)
 
 void uartAttachTx(uart_t* uart, uint8_t txPin, bool inverted)
 {
-    if(uart == NULL || txPin > 39) {
+    if(uart == NULL || txPin >= GPIO_PIN_COUNT) {
         return;
     }
     pinMode(txPin, OUTPUT);
@@ -162,7 +200,7 @@ void uartAttachTx(uart_t* uart, uint8_t txPin, bool inverted)
 
 uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t queueLen, bool inverted)
 {
-    if(uart_nr > 2) {
+    if(uart_nr >= UART_PORTS_NUM) {
         return NULL;
     }
 
@@ -190,9 +228,11 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
     if(uart_nr == 1){
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART1_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART1_RST);
+#if CONFIG_IDF_TARGET_ESP32
     } else if(uart_nr == 2){
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART2_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART2_RST);
+#endif
     } else {
         DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART_CLK_EN);
         DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART_RST);
@@ -208,6 +248,11 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
         uart->dev->conf0.stop_bit_num = ONE_STOP_BITS_CONF;
         uart->dev->rs485_conf.dl1_en = 1;
     }
+
+    // tx_idle_num : idle interval after tx FIFO is empty(unit: the time it takes to send one bit under current baudrate)
+    // Setting it to 0 prevents line idle time/delays when sending messages with small intervals
+    uart->dev->idle_conf.tx_idle_num = 0;  //
+
     UART_MUTEX_UNLOCK();
 
     if(rxPin != -1) {
@@ -217,7 +262,6 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
     if(txPin != -1) {
         uartAttachTx(uart, txPin, inverted);
     }
-
     addApbChangeCallback(uart, uart_on_apb_change);
     return uart;
 }
@@ -253,7 +297,7 @@ size_t uartResizeRxBuffer(uart_t * uart, size_t new_size) {
         vQueueDelete(uart->queue);
         uart->queue = xQueueCreate(new_size, sizeof(uint8_t));
         if(uart->queue == NULL) {
-            return NULL;
+            return 0;
         }
     }
     UART_MUTEX_UNLOCK();
@@ -266,7 +310,7 @@ uint32_t uartAvailable(uart_t* uart)
     if(uart == NULL || uart->queue == NULL) {
         return 0;
     }
-    return uxQueueMessagesWaiting(uart->queue);
+    return (uxQueueMessagesWaiting(uart->queue) + uart->dev->status.rxfifo_cnt) ;
 }
 
 uint32_t uartAvailableForWrite(uart_t* uart)
@@ -277,12 +321,41 @@ uint32_t uartAvailableForWrite(uart_t* uart)
     return 0x7f - uart->dev->status.txfifo_cnt;
 }
 
+void uartRxFifoToQueue(uart_t* uart)
+{
+	uint8_t c;
+    UART_MUTEX_LOCK();
+	//disable interrupts
+	uart->dev->int_ena.val = 0;
+	uart->dev->int_clr.val = 0xffffffff;
+#if CONFIG_IDF_TARGET_ESP32
+	while (uart->dev->status.rxfifo_cnt || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
+		c = uart->dev->fifo.rw_byte;
+#else
+	uint32_t fifo_reg = UART_FIFO_AHB_REG(uart->num);
+	while (uart->dev->status.rxfifo_cnt) {
+		c = ESP_REG(fifo_reg);
+#endif
+		xQueueSend(uart->queue, &c, 0);
+	}
+	//enable interrupts
+	uart->dev->int_ena.rxfifo_full = 1;
+	uart->dev->int_ena.frm_err = 1;
+	uart->dev->int_ena.rxfifo_tout = 1;
+	uart->dev->int_clr.val = 0xffffffff;
+    UART_MUTEX_UNLOCK();
+}
+
 uint8_t uartRead(uart_t* uart)
 {
     if(uart == NULL || uart->queue == NULL) {
         return 0;
     }
     uint8_t c;
+    if ((uxQueueMessagesWaiting(uart->queue) == 0) && (uart->dev->status.rxfifo_cnt > 0))
+    {
+    	uartRxFifoToQueue(uart);
+    }
     if(xQueueReceive(uart->queue, &c, 0)) {
         return c;
     }
@@ -295,6 +368,10 @@ uint8_t uartPeek(uart_t* uart)
         return 0;
     }
     uint8_t c;
+    if ((uxQueueMessagesWaiting(uart->queue) == 0) && (uart->dev->status.rxfifo_cnt > 0))
+    {
+    	uartRxFifoToQueue(uart);
+    }
     if(xQueuePeek(uart->queue, &c, 0)) {
         return c;
     }
@@ -308,7 +385,11 @@ void uartWrite(uart_t* uart, uint8_t c)
     }
     UART_MUTEX_LOCK();
     while(uart->dev->status.txfifo_cnt == 0x7F);
+#if CONFIG_IDF_TARGET_ESP32
     uart->dev->fifo.rw_byte = c;
+#else
+    ESP_REG(UART_FIFO_AHB_REG(uart->num)) = c;
+#endif
     UART_MUTEX_UNLOCK();
 }
 
@@ -318,31 +399,53 @@ void uartWriteBuf(uart_t* uart, const uint8_t * data, size_t len)
         return;
     }
     UART_MUTEX_LOCK();
+#ifndef CONFIG_IDF_TARGET_ESP32
+    uint32_t fifo_reg = UART_FIFO_AHB_REG(uart->num);
+#endif
     while(len) {
         while(uart->dev->status.txfifo_cnt == 0x7F);
+#if CONFIG_IDF_TARGET_ESP32
         uart->dev->fifo.rw_byte = *data++;
+#else
+        ESP_REG(fifo_reg) = *data++;
+#endif
         len--;
     }
     UART_MUTEX_UNLOCK();
 }
 
 void uartFlush(uart_t* uart)
+{
+    uartFlushTxOnly(uart,false);
+}
+
+void uartFlushTxOnly(uart_t* uart, bool txOnly)
 {
     if(uart == NULL) {
         return;
     }
 
     UART_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32
     while(uart->dev->status.txfifo_cnt || uart->dev->status.st_utx_out);
+    
+    if( !txOnly ){
+        //Due to hardware issue, we can not use fifo_rst to reset uart fifo.
+        //See description about UART_TXFIFO_RST and UART_RXFIFO_RST in <<esp32_technical_reference_manual>> v2.6 or later.
 
-    //Due to hardware issue, we can not use fifo_rst to reset uart fifo.
+        // we read the data out and make `fifo_len == 0 && rd_addr == wr_addr`.
-    //See description about UART_TXFIFO_RST and UART_RXFIFO_RST in <<esp32_technical_reference_manual>> v2.6 or later.
+        while(uart->dev->status.rxfifo_cnt != 0 || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
+            READ_PERI_REG(UART_FIFO_REG(uart->num));
+        }
 
-    // we read the data out and make `fifo_len == 0 && rd_addr == wr_addr`.
+        xQueueReset(uart->queue);
-    while(uart->dev->status.rxfifo_cnt != 0 || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
-        READ_PERI_REG(UART_FIFO_REG(uart->num));
     }
-
+#else
+    while(uart->dev->status.txfifo_cnt);
+    uart->dev->conf0.txfifo_rst = 1;
+    uart->dev->conf0.txfifo_rst = 0;
+#endif
+    
     UART_MUTEX_UNLOCK();
 }
 
@@ -368,18 +471,31 @@ static void uart_on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old
         uart->dev->int_clr.val = 0xffffffff;
         // read RX fifo
         uint8_t c;
-        BaseType_t xHigherPriorityTaskWoken;
+   //     BaseType_t xHigherPriorityTaskWoken;
+#if CONFIG_IDF_TARGET_ESP32
         while(uart->dev->status.rxfifo_cnt != 0 || (uart->dev->mem_rx_status.wr_addr != uart->dev->mem_rx_status.rd_addr)) {
             c = uart->dev->fifo.rw_byte;
-            if(uart->queue != NULL && !xQueueIsQueueFullFromISR(uart->queue)) {
+#else
-                xQueueSendFromISR(uart->queue, &c, &xHigherPriorityTaskWoken);
+        uint32_t fifo_reg = UART_FIFO_AHB_REG(uart->num);
+        while(uart->dev->status.rxfifo_cnt != 0) {
+            c = ESP_REG(fifo_reg);
+#endif
+            if(uart->queue != NULL ) {
+                xQueueSend(uart->queue, &c, 1); //&xHigherPriorityTaskWoken);
             }
         }
+        UART_MUTEX_UNLOCK();
+ 
         // wait TX empty
+#if CONFIG_IDF_TARGET_ESP32
         while(uart->dev->status.txfifo_cnt || uart->dev->status.st_utx_out);
+#else
+        while(uart->dev->status.txfifo_cnt);
+#endif
     } else {
         //todo:
         // set baudrate
+        UART_MUTEX_LOCK();
         uint32_t clk_div = (uart->dev->clk_div.div_int << 4) | (uart->dev->clk_div.div_frag & 0x0F);
         uint32_t baud_rate = ((old_apb<<4)/clk_div);
         clk_div = ((new_apb<<4)/baud_rate);
@@ -399,27 +515,44 @@ uint32_t uartGetBaudRate(uart_t* uart)
     if(uart == NULL) {
         return 0;
     }
+
     uint32_t clk_div = (uart->dev->clk_div.div_int << 4) | (uart->dev->clk_div.div_frag & 0x0F);
+    if(!clk_div) {
+        return 0;
+    }
+
     return ((getApbFrequency()<<4)/clk_div);
 }
 
-static void IRAM_ATTR uart0_write_char(char c)
+static void ARDUINO_ISR_ATTR uart0_write_char(char c)
 {
+#if CONFIG_IDF_TARGET_ESP32
     while(((ESP_REG(0x01C+DR_REG_UART_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
     ESP_REG(DR_REG_UART_BASE) = c;
+#else
+    while(UART0.status.txfifo_cnt == 0x7F);
+    WRITE_PERI_REG(UART_FIFO_AHB_REG(0), c);
+#endif
 }
 
-static void IRAM_ATTR uart1_write_char(char c)
+static void ARDUINO_ISR_ATTR uart1_write_char(char c)
 {
+#if CONFIG_IDF_TARGET_ESP32
     while(((ESP_REG(0x01C+DR_REG_UART1_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
     ESP_REG(DR_REG_UART1_BASE) = c;
+#else
+    while(UART1.status.txfifo_cnt == 0x7F);
+    WRITE_PERI_REG(UART_FIFO_AHB_REG(1), c);
+#endif
 }
 
-static void IRAM_ATTR uart2_write_char(char c)
+#if CONFIG_IDF_TARGET_ESP32
+static void ARDUINO_ISR_ATTR uart2_write_char(char c)
 {
     while(((ESP_REG(0x01C+DR_REG_UART2_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
     ESP_REG(DR_REG_UART2_BASE) = c;
 }
+#endif
 
 void uart_install_putc()
 {
@@ -430,9 +563,11 @@ void uart_install_putc()
     case 1:
         ets_install_putc1((void (*)(char)) &uart1_write_char);
         break;
+#if CONFIG_IDF_TARGET_ESP32
     case 2:
         ets_install_putc1((void (*)(char)) &uart2_write_char);
         break;
+#endif
     default:
         ets_install_putc1(NULL);
         break;
@@ -441,7 +576,7 @@ void uart_install_putc()
 
 void uartSetDebug(uart_t* uart)
 {
-    if(uart == NULL || uart->num > 2) {
+    if(uart == NULL || uart->num >= UART_PORTS_NUM) {
         s_uart_debug_nr = -1;
         //ets_install_putc1(NULL);
         //return;
@@ -460,9 +595,6 @@ int uartGetDebug()
 
 int log_printf(const char *format, ...)
 {
-    if(s_uart_debug_nr < 0){
-        return 0;
-    }
     static char loc_buf[64];
     char * temp = loc_buf;
     int len;
@@ -480,7 +612,7 @@ int log_printf(const char *format, ...)
     }
     vsnprintf(temp, len+1, format, arg);
 #if !CONFIG_DISABLE_HAL_LOCKS
-    if(_uart_bus_array[s_uart_debug_nr].lock){
+    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);
         ets_printf("%s", temp);
         xSemaphoreGive(_uart_bus_array[s_uart_debug_nr].lock);
@@ -520,6 +652,14 @@ unsigned long uartBaudrateDetect(uart_t *uart, bool flg)
  * detected calling uartBadrateDetect(). The raw baudrate is computed using the UART_CLK_FREQ. The raw baudrate is 
  * rounded to the closed real baudrate.
 */
+void uartStartDetectBaudrate(uart_t *uart) {
+  if(!uart) return;
+
+  uart->dev->auto_baud.glitch_filt = 0x08;
+  uart->dev->auto_baud.en = 0;
+  uart->dev->auto_baud.en = 1;
+}
+
 unsigned long
 uartDetectBaudrate(uart_t *uart)
 {
@@ -563,5 +703,9 @@ uartDetectBaudrate(uart_t *uart)
  * Returns the status of the RX state machine, if the value is non-zero the state machine is active.
  */
 bool uartRxActive(uart_t* uart) {
+#if CONFIG_IDF_TARGET_ESP32
     return uart->dev->status.st_urx_out != 0;
+#else
+    return 0;
+#endif
 }

cores/esp32/esp32-hal-uart.h

@@ -63,6 +63,7 @@ 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);
@@ -72,6 +73,7 @@ size_t uartResizeRxBuffer(uart_t* uart, size_t new_size);
 void uartSetDebug(uart_t* uart);
 int uartGetDebug();
 
+void uartStartDetectBaudrate(uart_t *uart);
 unsigned long uartDetectBaudrate(uart_t *uart);
 
 bool uartRxActive(uart_t* uart);

cores/esp32/esp32-hal.h

@@ -20,10 +20,6 @@
 #ifndef HAL_ESP32_HAL_H_
 #define HAL_ESP32_HAL_H_
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include <stdint.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -34,9 +30,34 @@ extern "C" {
 #include <math.h>
 #include "sdkconfig.h"
 #include "esp_system.h"
+#include "esp_sleep.h"
+
+#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
+#define ARDUINO_ISR_FLAG ESP_INTR_FLAG_IRAM
+#else
+#define ARDUINO_ISR_ATTR
+#define ARDUINO_ISR_FLAG (0)
+#endif
+
+#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
@@ -64,12 +85,6 @@ void yield(void);
 #include "esp32-hal-psram.h"
 #include "esp32-hal-cpu.h"
 
-#ifndef BOARD_HAS_PSRAM
-#ifdef CONFIG_SPIRAM_SUPPORT
-#undef CONFIG_SPIRAM_SUPPORT
-#endif
-#endif
-
 //returns chip temperature in Celsius
 float temperatureRead();
 
@@ -90,6 +105,16 @@ 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);

cores/esp32/esp8266-compat.h

@@ -18,7 +18,7 @@
 #define _ESP8266_COMPAT_H_
 
 #define ICACHE_FLASH_ATTR
-#define ICACHE_RAM_ATTR IRAM_ATTR
+#define ICACHE_RAM_ATTR ARDUINO_ISR_ATTR
 
 
 #endif /* _ESP8266_COMPAT_H_ */

cores/esp32/main.cpp

@@ -2,15 +2,22 @@
 #include "freertos/task.h"
 #include "esp_task_wdt.h"
 #include "Arduino.h"
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+#include "USB.h"
+#endif
 
 TaskHandle_t loopTaskHandle = NULL;
 
 #if CONFIG_AUTOSTART_ARDUINO
-
 #if CONFIG_FREERTOS_UNICORE
-#define ARDUINO_RUNNING_CORE 0
+void yieldIfNecessary(void){
-#else
+    static uint64_t lastYield = 0;
-#define ARDUINO_RUNNING_CORE 1
+    uint64_t now = millis();
+    if((now - lastYield) > 2000) {
+        lastYield = now;
+        vTaskDelay(5); //delay 1 RTOS tick
+    }
+}
 #endif
 
 bool loopTaskWDTEnabled;
@@ -19,18 +26,25 @@ void loopTask(void *pvParameters)
 {
     setup();
     for(;;) {
+#if CONFIG_FREERTOS_UNICORE
+        yieldIfNecessary();
+#endif
         if(loopTaskWDTEnabled){
             esp_task_wdt_reset();
         }
         loop();
+        if (serialEventRun) serialEventRun();
     }
 }
 
 extern "C" void app_main()
 {
+#if ARDUINO_SERIAL_PORT //Serial used for USB CDC
+    USB.begin();
+#endif
     loopTaskWDTEnabled = false;
     initArduino();
-    xTaskCreatePinnedToCore(loopTask, "loopTask", 8192, NULL, 1, &loopTaskHandle, ARDUINO_RUNNING_CORE);
+    xTaskCreateUniversal(loopTask, "loopTask", 8192, NULL, 1, &loopTaskHandle, ARDUINO_RUNNING_CORE);
 }
 
 #endif

cores/esp32/pgmspace.h

@@ -32,7 +32,6 @@ typedef unsigned long prog_uint32_t;
 #define PROGMEM
 #define PGM_P         const char *
 #define PGM_VOID_P    const void *
-#define FPSTR(p)      ((const char *)(p))
 #define PSTR(s)       (s)
 #define _SFR_BYTE(n)  (n)
 

docs/arduino-ide/boards_manager.md

@@ -1,13 +1,12 @@
-Installation instructions using Arduino IDE Boards Manager
+## Installation instructions using Arduino IDE Boards Manager
-==========================================================
+### ==========================================================
 
-Starting with 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, Mac OS, and Linux (32 and 64 bit).
+- Stable release link: `https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json`
+- Development release link: `https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json`
+
+Starting with 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, Mac OS, and Linux (32, 64 bit and ARM).
 
 - Install the current upstream Arduino IDE at the 1.8 level or later. The current version is at the [Arduino website](http://www.arduino.cc/en/main/software).
 - Start Arduino and open Preferences window.
-- Enter ```https://dl.espressif.com/dl/package_esp32_index.json``` into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
+- Enter one of the release links above into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
 - Open Boards Manager from Tools > Board menu and install *esp32* platform (and don't forget to select your ESP32 board from Tools > Board menu after installation).
-
-Stable release link: `https://dl.espressif.com/dl/package_esp32_index.json`
-
-Development release link: `https://dl.espressif.com/dl/package_esp32_dev_index.json`

docs/arduino-ide/mac.md

@@ -23,5 +23,7 @@ Installation instructions for Mac OS
   
 - Try `python3` instead of `python` if you get the error: `IOError: [Errno socket error] [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590)` when running `python get.py`
 
+- If you get the following error when running `python get.py` urllib.error.URLError: <urlopen error SSL: CERTIFICATE_VERIFY_FAILED, go to Macintosh HD > Applications > Python3.6 folder (or any other python version), and run the following scripts: Install Certificates.command and Update Shell Profile.command
+
 - Restart Arduino IDE
 

docs/esp-idf_component.md

@@ -1,6 +1,10 @@
 To use as a component of ESP-IDF
 =================================================
 
+## esp32-arduino-lib-builder
+
+For a simplified method, see [lib-builder](lib_builder.md)
+
 ## Installation
 
 - Download and install [esp-idf](https://github.com/espressif/esp-idf)

docs/lib_builder.md

@@ -0,0 +1,14 @@
+## Using esp32-arduino-lib-builder to compile custom libraries
+
+Espressif has provided a [tool](https://github.com/espressif/esp32-arduino-lib-builder) to simplify building your own compiled libraries for use in Arduino IDE (or your favorite IDE).
+To use it to generate custom libraries, follow these steps:
+1. `git clone https://github.com/espressif/esp32-arduino-lib-builder`
+2. `cd esp32-arduino-lib-builder`
+3. `./tools/update-components.sh`
+4. `./tools/install-esp-idf.sh` (if you already have an $IDF_PATH defined, it will use your local copy of the repository)
+5. `make menuconfig` or directly edit sdkconfig.
+6. `./build.sh`
+
+The script automates the process of building [arduino as an ESP-IDF component](https://github.com/espressif/arduino-esp32/blob/master/docs/esp-idf_component.md).
+Once it is complete, you can cherry pick the needed libraries from `out/tools/sdk/lib`, or run `tools/copy-to-arduino.sh` to copy the entire built system.
+`tools/config.sh` contains a number of variables that control the process, particularly the $IDF_BRANCH variable.  You can adjust this to try building against newer versions, but there are absolutely no guarantees that any components will work or even successfully compile against a newer IDF.

docs/platformio.md

@@ -1,11 +1,11 @@
 Installation instructions for using PlatformIO
 =================================================
 
-- [What is PlatformIO?](http://docs.platformio.org/en/latest/what-is-platformio.html?utm_source=github&utm_medium=arduino-esp32)
+- [What is PlatformIO?](https://docs.platformio.org/en/latest/what-is-platformio.html?utm_source=github&utm_medium=arduino-esp32)
-- [PlatformIO IDE](http://platformio.org/platformio-ide?utm_source=github&utm_medium=arduino-esp32)
+- [PlatformIO IDE](https://platformio.org/platformio-ide?utm_source=github&utm_medium=arduino-esp32)
-- [PlatformIO Core](http://docs.platformio.org/en/latest/core.html?utm_source=github&utm_medium=arduino-esp32) (command line tool)
+- [PlatformIO Core](https://docs.platformio.org/en/latest/core.html?utm_source=github&utm_medium=arduino-esp32) (command line tool)
-- [Advanced usage](http://docs.platformio.org/en/latest/platforms/espressif32.html?utm_source=github&utm_medium=arduino-esp32) -
+- [Advanced usage](https://docs.platformio.org/en/latest/platforms/espressif32.html?utm_source=github&utm_medium=arduino-esp32) -
   custom settings, uploading to SPIFFS, Over-the-Air (OTA), staging version
-- [Integration with Cloud and Standalone IDEs](http://docs.platformio.org/en/latest/ide.html?utm_source=github&utm_medium=arduino-esp32) -
+- [Integration with Cloud and Standalone IDEs](https://docs.platformio.org/en/latest/ide.html?utm_source=github&utm_medium=arduino-esp32) -
   Cloud9, Codeanywhere, Eclipse Che (Codenvy), Atom, CLion, Eclipse, Emacs, NetBeans, Qt Creator, Sublime Text, VIM, Visual Studio, and VSCode
-- [Project Examples](http://docs.platformio.org/en/latest/platforms/espressif32.html?utm_source=github&utm_medium=arduino-esp32#examples)
+- [Project Examples](https://docs.platformio.org/en/latest/platforms/espressif32.html?utm_source=github&utm_medium=arduino-esp32#examples)

libraries/ArduinoOTA/src/ArduinoOTA.cpp

@@ -127,9 +127,7 @@ void ArduinoOTAClass::begin() {
     }
     _initialized = true;
     _state = OTA_IDLE;
-#ifdef OTA_DEBUG
+    log_i("OTA server at: %s.local:%u", _hostname.c_str(), _port);
-    OTA_DEBUG.printf("OTA server at: %s.local:%u\n", _hostname.c_str(), _port);
-#endif
 }
 
 int ArduinoOTAClass::parseInt(){
@@ -173,6 +171,7 @@ void ArduinoOTAClass::_onRx(){
         _md5 = readStringUntil('\n');
         _md5.trim();
         if(_md5.length() != 32){
+            log_e("bad md5 length");
             return;
         }
 
@@ -198,6 +197,7 @@ void ArduinoOTAClass::_onRx(){
     } else if (_state == OTA_WAITAUTH) {
         int cmd = parseInt();
         if (cmd != U_AUTH) {
+            log_e("%d was expected. got %d instead", U_AUTH, cmd);
             _state = OTA_IDLE;
             return;
         }
@@ -205,6 +205,7 @@ void ArduinoOTAClass::_onRx(){
         String cnonce = readStringUntil(' ');
         String response = readStringUntil('\n');
         if (cnonce.length() != 32 || response.length() != 32) {
+            log_e("auth param fail");
             _state = OTA_IDLE;
             return;
         }
@@ -225,6 +226,7 @@ void ArduinoOTAClass::_onRx(){
         } else {
             _udp_ota.beginPacket(_udp_ota.remoteIP(), _udp_ota.remotePort());
             _udp_ota.print("Authentication Failed");
+            log_w("Authentication Failed");
             _udp_ota.endPacket();
             if (_error_callback) _error_callback(OTA_AUTH_ERROR);
             _state = OTA_IDLE;
@@ -234,9 +236,9 @@ void ArduinoOTAClass::_onRx(){
 
 void ArduinoOTAClass::_runUpdate() {
     if (!Update.begin(_size, _cmd)) {
-#ifdef OTA_DEBUG
+
-        Update.printError(OTA_DEBUG);
+        log_e("Begin ERROR: %s", Update.errorString());
-#endif
+
         if (_error_callback) {
             _error_callback(OTA_BEGIN_ERROR);
         }
@@ -272,21 +274,15 @@ void ArduinoOTAClass::_runUpdate() {
         }
         if (!waited){
             if(written && tried++ < 3){
-#ifdef OTA_DEBUG
+                log_i("Try[%u]: %u", tried, written);
-                OTA_DEBUG.printf("Try[%u]: %u\n", tried, written);
-#endif
                 if(!client.printf("%u", written)){
-#ifdef OTA_DEBUG
+                    log_e("failed to respond");
-                    OTA_DEBUG.printf("failed to respond\n");
-#endif
                     _state = OTA_IDLE;
                     break;
                 }
                 continue;
             }
-#ifdef OTA_DEBUG
+            log_e("Receive Failed");
-            OTA_DEBUG.printf("Receive Failed\n");
-#endif
             if (_error_callback) {
                 _error_callback(OTA_RECEIVE_ERROR);
             }
@@ -295,9 +291,7 @@ void ArduinoOTAClass::_runUpdate() {
             return;
         }
         if(!available){
-#ifdef OTA_DEBUG
+            log_e("No Data: %u", waited);
-            OTA_DEBUG.printf("No Data: %u\n", waited);
-#endif
             _state = OTA_IDLE;
             break;
         }
@@ -317,18 +311,14 @@ void ArduinoOTAClass::_runUpdate() {
                 log_w("didn't write enough! %u != %u", written, r);
             }
             if(!client.printf("%u", written)){
-#ifdef OTA_DEBUG
+                log_w("failed to respond");
-                OTA_DEBUG.printf("failed to respond\n");
-#endif
             }
             total += written;
             if(_progress_callback) {
                 _progress_callback(total, _size);
             }
         } else {
-#ifdef OTA_DEBUG
+            log_e("Write ERROR: %s", Update.errorString());
-            Update.printError(OTA_DEBUG);
-#endif
         }
     }
 
@@ -351,10 +341,7 @@ void ArduinoOTAClass::_runUpdate() {
         Update.printError(client);
         client.stop();
         delay(10);
-#ifdef OTA_DEBUG
+        log_e("Update ERROR: %s", Update.errorString());
-        OTA_DEBUG.print("Update ERROR: ");
-        Update.printError(OTA_DEBUG);
-#endif
         _state = OTA_IDLE;
     }
 }
@@ -366,9 +353,7 @@ void ArduinoOTAClass::end() {
         MDNS.end();
     }
     _state = OTA_IDLE;
-#ifdef OTA_DEBUG
+    log_i("OTA server stopped.");
-    OTA_DEBUG.println("OTA server stopped.");
-#endif
 }
 
 void ArduinoOTAClass::handle() {
@@ -395,4 +380,4 @@ void ArduinoOTAClass::setTimeout(int timeoutInMillis) {
 
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_ARDUINOOTA)
 ArduinoOTAClass ArduinoOTA;
-#endif
+#endif

libraries/AsyncUDP/library.json

@@ -1,17 +0,0 @@
-{
-  "name":"AsyncUDP",
-  "description":"Asynchronous UDP Library for ESP32",
-  "keywords":"async,udp,server,client,multicast,broadcast",
-  "authors":
-  {
-    "name": "Hristo Gochkov",
-    "maintainer": true
-  },
-  "repository":
-  {
-    "type": "git",
-    "url": "https://github.com/me-no-dev/ESPAsyncUDP.git"
-  },
-  "frameworks": "arduino",
-  "platforms":"espressif"
-}

libraries/AsyncUDP/src/AsyncUDP.cpp

@@ -150,7 +150,7 @@ static bool _udp_task_start(){
         }
     }
     if(!_udp_task_handle){
-        xTaskCreate(_udp_task, "async_udp", 4096, NULL, 3, (TaskHandle_t*)&_udp_task_handle);
+        xTaskCreateUniversal(_udp_task, "async_udp", 4096, NULL, 3, (TaskHandle_t*)&_udp_task_handle, CONFIG_ARDUINO_UDP_RUNNING_CORE);
         if(!_udp_task_handle){
             return false;
         }

libraries/AsyncUDP/src/AsyncUDP.h

@@ -7,7 +7,7 @@
 #include <functional>
 extern "C" {
 #include "lwip/ip_addr.h"
-#include <tcpip_adapter.h>
+#include "esp_netif.h"
 #include "freertos/queue.h"
 #include "freertos/semphr.h"
 }

libraries/BLE/README.md

@@ -0,0 +1,15 @@
+# ESP32 BLE for Arduino
+The Arduino IDE provides an excellent library package manager where versions of libraries can be downloaded and installed.  This Github project provides the repository for the ESP32 BLE support for Arduino.
+
+The actual source of the project which is being maintained can be found here:
+
+https://github.com/nkolban/esp32-snippets
+
+Issues and questions should be raised here:
+
+https://github.com/nkolban/esp32-snippets/issues
+
+
+Documentation for using the library can be found here:
+
+https://github.com/nkolban/esp32-snippets/tree/master/Documentation

libraries/BLE/examples/BLE_client/BLE_client.ino

@@ -0,0 +1,161 @@
+/**
+ * A BLE client example that is rich in capabilities.
+ * There is a lot new capabilities implemented.
+ * author unknown
+ * updated by chegewara
+ */
+
+#include "BLEDevice.h"
+//#include "BLEScan.h"
+
+// The remote service we wish to connect to.
+static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b");
+// The characteristic of the remote service we are interested in.
+static BLEUUID    charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8");
+
+static boolean doConnect = false;
+static boolean connected = false;
+static boolean doScan = false;
+static BLERemoteCharacteristic* pRemoteCharacteristic;
+static BLEAdvertisedDevice* myDevice;
+
+static void notifyCallback(
+  BLERemoteCharacteristic* pBLERemoteCharacteristic,
+  uint8_t* pData,
+  size_t length,
+  bool isNotify) {
+    Serial.print("Notify callback for characteristic ");
+    Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str());
+    Serial.print(" of data length ");
+    Serial.println(length);
+    Serial.print("data: ");
+    Serial.println((char*)pData);
+}
+
+class MyClientCallback : public BLEClientCallbacks {
+  void onConnect(BLEClient* pclient) {
+  }
+
+  void onDisconnect(BLEClient* pclient) {
+    connected = false;
+    Serial.println("onDisconnect");
+  }
+};
+
+bool connectToServer() {
+    Serial.print("Forming a connection to ");
+    Serial.println(myDevice->getAddress().toString().c_str());
+    
+    BLEClient*  pClient  = BLEDevice::createClient();
+    Serial.println(" - Created client");
+
+    pClient->setClientCallbacks(new MyClientCallback());
+
+    // Connect to the remove BLE Server.
+    pClient->connect(myDevice);  // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private)
+    Serial.println(" - Connected to server");
+
+    // Obtain a reference to the service we are after in the remote BLE server.
+    BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
+    if (pRemoteService == nullptr) {
+      Serial.print("Failed to find our service UUID: ");
+      Serial.println(serviceUUID.toString().c_str());
+      pClient->disconnect();
+      return false;
+    }
+    Serial.println(" - Found our service");
+
+
+    // Obtain a reference to the characteristic in the service of the remote BLE server.
+    pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
+    if (pRemoteCharacteristic == nullptr) {
+      Serial.print("Failed to find our characteristic UUID: ");
+      Serial.println(charUUID.toString().c_str());
+      pClient->disconnect();
+      return false;
+    }
+    Serial.println(" - Found our characteristic");
+
+    // Read the value of the characteristic.
+    if(pRemoteCharacteristic->canRead()) {
+      std::string value = pRemoteCharacteristic->readValue();
+      Serial.print("The characteristic value was: ");
+      Serial.println(value.c_str());
+    }
+
+    if(pRemoteCharacteristic->canNotify())
+      pRemoteCharacteristic->registerForNotify(notifyCallback);
+
+    connected = true;
+    return true;
+}
+/**
+ * Scan for BLE servers and find the first one that advertises the service we are looking for.
+ */
+class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
+ /**
+   * Called for each advertising BLE server.
+   */
+  void onResult(BLEAdvertisedDevice advertisedDevice) {
+    Serial.print("BLE Advertised Device found: ");
+    Serial.println(advertisedDevice.toString().c_str());
+
+    // We have found a device, let us now see if it contains the service we are looking for.
+    if (advertisedDevice.haveServiceUUID() && advertisedDevice.isAdvertisingService(serviceUUID)) {
+
+      BLEDevice::getScan()->stop();
+      myDevice = new BLEAdvertisedDevice(advertisedDevice);
+      doConnect = true;
+      doScan = true;
+
+    } // Found our server
+  } // onResult
+}; // MyAdvertisedDeviceCallbacks
+
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Starting Arduino BLE Client application...");
+  BLEDevice::init("");
+
+  // Retrieve a Scanner and set the callback we want to use to be informed when we
+  // have detected a new device.  Specify that we want active scanning and start the
+  // scan to run for 5 seconds.
+  BLEScan* pBLEScan = BLEDevice::getScan();
+  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
+  pBLEScan->setInterval(1349);
+  pBLEScan->setWindow(449);
+  pBLEScan->setActiveScan(true);
+  pBLEScan->start(5, false);
+} // End of setup.
+
+
+// This is the Arduino main loop function.
+void loop() {
+
+  // If the flag "doConnect" is true then we have scanned for and found the desired
+  // BLE Server with which we wish to connect.  Now we connect to it.  Once we are 
+  // connected we set the connected flag to be true.
+  if (doConnect == true) {
+    if (connectToServer()) {
+      Serial.println("We are now connected to the BLE Server.");
+    } else {
+      Serial.println("We have failed to connect to the server; there is nothin more we will do.");
+    }
+    doConnect = false;
+  }
+
+  // If we are connected to a peer BLE Server, update the characteristic each time we are reached
+  // with the current time since boot.
+  if (connected) {
+    String newValue = "Time since boot: " + String(millis()/1000);
+    Serial.println("Setting new characteristic value to \"" + newValue + "\"");
+    
+    // Set the characteristic's value to be the array of bytes that is actually a string.
+    pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length());
+  }else if(doScan){
+    BLEDevice::getScan()->start(0);  // this is just example to start scan after disconnect, most likely there is better way to do it in arduino
+  }
+  
+  delay(1000); // Delay a second between loops.
+} // End of loop

libraries/BLE/examples/BLE_iBeacon/BLE_iBeacon.ino

@@ -0,0 +1,104 @@
+/*
+   Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
+   Ported to Arduino ESP32 by pcbreflux
+*/
+
+ 
+/*
+   Create a BLE server that will send periodic iBeacon frames.
+   The design of creating the BLE server is:
+   1. Create a BLE Server
+   2. Create advertising data
+   3. Start advertising.
+   4. wait
+   5. Stop advertising.
+   6. deep sleep
+   
+*/
+#include "sys/time.h"
+
+#include "BLEDevice.h"
+#include "BLEUtils.h"
+#include "BLEBeacon.h"
+#include "esp_sleep.h"
+
+#define GPIO_DEEP_SLEEP_DURATION     10  // sleep x seconds and then wake up
+RTC_DATA_ATTR static time_t last;        // remember last boot in RTC Memory
+RTC_DATA_ATTR static uint32_t bootcount; // remember number of boots in RTC Memory
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint8_t temprature_sens_read();
+//uint8_t g_phyFuns;
+
+#ifdef __cplusplus
+}
+#endif
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+BLEAdvertising *pAdvertising;
+struct timeval now;
+
+#define BEACON_UUID           "8ec76ea3-6668-48da-9866-75be8bc86f4d" // UUID 1 128-Bit (may use linux tool uuidgen or random numbers via https://www.uuidgenerator.net/)
+
+void setBeacon() {
+
+  BLEBeacon oBeacon = BLEBeacon();
+  oBeacon.setManufacturerId(0x4C00); // fake Apple 0x004C LSB (ENDIAN_CHANGE_U16!)
+  oBeacon.setProximityUUID(BLEUUID(BEACON_UUID));
+  oBeacon.setMajor((bootcount & 0xFFFF0000) >> 16);
+  oBeacon.setMinor(bootcount&0xFFFF);
+  BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();
+  BLEAdvertisementData oScanResponseData = BLEAdvertisementData();
+  
+  oAdvertisementData.setFlags(0x04); // BR_EDR_NOT_SUPPORTED 0x04
+  
+  std::string strServiceData = "";
+  
+  strServiceData += (char)26;     // Len
+  strServiceData += (char)0xFF;   // Type
+  strServiceData += oBeacon.getData(); 
+  oAdvertisementData.addData(strServiceData);
+  
+  pAdvertising->setAdvertisementData(oAdvertisementData);
+  pAdvertising->setScanResponseData(oScanResponseData);
+  pAdvertising->setAdvertisementType(ADV_TYPE_NONCONN_IND);
+
+}
+
+void setup() {
+
+    
+  Serial.begin(115200);
+  gettimeofday(&now, NULL);
+
+  Serial.printf("start ESP32 %d\n",bootcount++);
+
+  Serial.printf("deep sleep (%lds since last reset, %lds since last boot)\n",now.tv_sec,now.tv_sec-last);
+
+  last = now.tv_sec;
+  
+  // Create the BLE Device
+  BLEDevice::init("");
+
+  // Create the BLE Server
+  // BLEServer *pServer = BLEDevice::createServer(); // <-- no longer required to instantiate BLEServer, less flash and ram usage
+
+  pAdvertising = BLEDevice::getAdvertising();
+  
+  setBeacon();
+   // Start advertising
+  pAdvertising->start();
+  Serial.println("Advertizing started...");
+  delay(100);
+  pAdvertising->stop();
+  Serial.printf("enter deep sleep\n");
+  esp_deep_sleep(1000000LL * GPIO_DEEP_SLEEP_DURATION);
+  Serial.printf("in deep sleep\n");
+}
+
+void loop() {
+}

libraries/BLE/examples/BLE_notify/BLE_notify.ino

@@ -0,0 +1,110 @@
+/*
+    Video: https://www.youtube.com/watch?v=oCMOYS71NIU
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+    updated by chegewara
+
+   Create a BLE server that, once we receive a connection, will send periodic notifications.
+   The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
+   And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8
+
+   The design of creating the BLE server is:
+   1. Create a BLE Server
+   2. Create a BLE Service
+   3. Create a BLE Characteristic on the Service
+   4. Create a BLE Descriptor on the characteristic
+   5. Start the service.
+   6. Start advertising.
+
+   A connect hander associated with the server starts a background task that performs notification
+   every couple of seconds.
+*/
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+
+BLEServer* pServer = NULL;
+BLECharacteristic* pCharacteristic = NULL;
+bool deviceConnected = false;
+bool oldDeviceConnected = false;
+uint32_t value = 0;
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+    }
+};
+
+
+
+void setup() {
+  Serial.begin(115200);
+
+  // Create the BLE Device
+  BLEDevice::init("ESP32");
+
+  // Create the BLE Server
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+
+  // Create the BLE Service
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  // Create a BLE Characteristic
+  pCharacteristic = pService->createCharacteristic(
+                      CHARACTERISTIC_UUID,
+                      BLECharacteristic::PROPERTY_READ   |
+                      BLECharacteristic::PROPERTY_WRITE  |
+                      BLECharacteristic::PROPERTY_NOTIFY |
+                      BLECharacteristic::PROPERTY_INDICATE
+                    );
+
+  // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
+  // Create a BLE Descriptor
+  pCharacteristic->addDescriptor(new BLE2902());
+
+  // Start the service
+  pService->start();
+
+  // Start advertising
+  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
+  pAdvertising->addServiceUUID(SERVICE_UUID);
+  pAdvertising->setScanResponse(false);
+  pAdvertising->setMinPreferred(0x0);  // set value to 0x00 to not advertise this parameter
+  BLEDevice::startAdvertising();
+  Serial.println("Waiting a client connection to notify...");
+}
+
+void loop() {
+    // notify changed value
+    if (deviceConnected) {
+        pCharacteristic->setValue((uint8_t*)&value, 4);
+        pCharacteristic->notify();
+        value++;
+        delay(3); // bluetooth stack will go into congestion, if too many packets are sent, in 6 hours test i was able to go as low as 3ms
+    }
+    // disconnecting
+    if (!deviceConnected && oldDeviceConnected) {
+        delay(500); // give the bluetooth stack the chance to get things ready
+        pServer->startAdvertising(); // restart advertising
+        Serial.println("start advertising");
+        oldDeviceConnected = deviceConnected;
+    }
+    // connecting
+    if (deviceConnected && !oldDeviceConnected) {
+        // do stuff here on connecting
+        oldDeviceConnected = deviceConnected;
+    }
+}

libraries/BLE/examples/BLE_scan/BLE_scan.ino

@@ -0,0 +1,40 @@
+/*
+   Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleScan.cpp
+   Ported to Arduino ESP32 by Evandro Copercini
+*/
+
+#include <BLEDevice.h>
+#include <BLEUtils.h>
+#include <BLEScan.h>
+#include <BLEAdvertisedDevice.h>
+
+int scanTime = 5; //In seconds
+BLEScan* pBLEScan;
+
+class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
+    void onResult(BLEAdvertisedDevice advertisedDevice) {
+      Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
+    }
+};
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Scanning...");
+
+  BLEDevice::init("");
+  pBLEScan = BLEDevice::getScan(); //create new scan
+  pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
+  pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
+  pBLEScan->setInterval(100);
+  pBLEScan->setWindow(99);  // less or equal setInterval value
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  BLEScanResults foundDevices = pBLEScan->start(scanTime, false);
+  Serial.print("Devices found: ");
+  Serial.println(foundDevices.getCount());
+  Serial.println("Scan done!");
+  pBLEScan->clearResults();   // delete results fromBLEScan buffer to release memory
+  delay(2000);
+}

libraries/BLE/examples/BLE_server/BLE_server.ino

@@ -0,0 +1,45 @@
+/*
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleServer.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+    updates by chegewara
+*/
+
+#include <BLEDevice.h>
+#include <BLEUtils.h>
+#include <BLEServer.h>
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Starting BLE work!");
+
+  BLEDevice::init("Long name works now");
+  BLEServer *pServer = BLEDevice::createServer();
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
+                                         CHARACTERISTIC_UUID,
+                                         BLECharacteristic::PROPERTY_READ |
+                                         BLECharacteristic::PROPERTY_WRITE
+                                       );
+
+  pCharacteristic->setValue("Hello World says Neil");
+  pService->start();
+  // BLEAdvertising *pAdvertising = pServer->getAdvertising();  // this still is working for backward compatibility
+  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
+  pAdvertising->addServiceUUID(SERVICE_UUID);
+  pAdvertising->setScanResponse(true);
+  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
+  pAdvertising->setMinPreferred(0x12);
+  BLEDevice::startAdvertising();
+  Serial.println("Characteristic defined! Now you can read it in your phone!");
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  delay(2000);
+}

libraries/BLE/examples/BLE_server_multiconnect/BLE_server_multiconnect.ino

@@ -0,0 +1,111 @@
+/*
+    Video: https://www.youtube.com/watch?v=oCMOYS71NIU
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+    updated by chegewara
+
+   Create a BLE server that, once we receive a connection, will send periodic notifications.
+   The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
+   And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8
+
+   The design of creating the BLE server is:
+   1. Create a BLE Server
+   2. Create a BLE Service
+   3. Create a BLE Characteristic on the Service
+   4. Create a BLE Descriptor on the characteristic
+   5. Start the service.
+   6. Start advertising.
+
+   A connect hander associated with the server starts a background task that performs notification
+   every couple of seconds.
+*/
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+
+BLEServer* pServer = NULL;
+BLECharacteristic* pCharacteristic = NULL;
+bool deviceConnected = false;
+bool oldDeviceConnected = false;
+uint32_t value = 0;
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+      BLEDevice::startAdvertising();
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+    }
+};
+
+
+
+void setup() {
+  Serial.begin(115200);
+
+  // Create the BLE Device
+  BLEDevice::init("ESP32");
+
+  // Create the BLE Server
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+
+  // Create the BLE Service
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  // Create a BLE Characteristic
+  pCharacteristic = pService->createCharacteristic(
+                      CHARACTERISTIC_UUID,
+                      BLECharacteristic::PROPERTY_READ   |
+                      BLECharacteristic::PROPERTY_WRITE  |
+                      BLECharacteristic::PROPERTY_NOTIFY |
+                      BLECharacteristic::PROPERTY_INDICATE
+                    );
+
+  // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
+  // Create a BLE Descriptor
+  pCharacteristic->addDescriptor(new BLE2902());
+
+  // Start the service
+  pService->start();
+
+  // Start advertising
+  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
+  pAdvertising->addServiceUUID(SERVICE_UUID);
+  pAdvertising->setScanResponse(false);
+  pAdvertising->setMinPreferred(0x0);  // set value to 0x00 to not advertise this parameter
+  BLEDevice::startAdvertising();
+  Serial.println("Waiting a client connection to notify...");
+}
+
+void loop() {
+    // notify changed value
+    if (deviceConnected) {
+        pCharacteristic->setValue((uint8_t*)&value, 4);
+        pCharacteristic->notify();
+        value++;
+        delay(10); // bluetooth stack will go into congestion, if too many packets are sent, in 6 hours test i was able to go as low as 3ms
+    }
+    // disconnecting
+    if (!deviceConnected && oldDeviceConnected) {
+        delay(500); // give the bluetooth stack the chance to get things ready
+        pServer->startAdvertising(); // restart advertising
+        Serial.println("start advertising");
+        oldDeviceConnected = deviceConnected;
+    }
+    // connecting
+    if (deviceConnected && !oldDeviceConnected) {
+        // do stuff here on connecting
+        oldDeviceConnected = deviceConnected;
+    }
+}

libraries/BLE/examples/BLE_uart/BLE_uart.ino

@@ -0,0 +1,125 @@
+/*
+    Video: https://www.youtube.com/watch?v=oCMOYS71NIU
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+
+   Create a BLE server that, once we receive a connection, will send periodic notifications.
+   The service advertises itself as: 6E400001-B5A3-F393-E0A9-E50E24DCCA9E
+   Has a characteristic of: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E - used for receiving data with "WRITE" 
+   Has a characteristic of: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E - used to send data with  "NOTIFY"
+
+   The design of creating the BLE server is:
+   1. Create a BLE Server
+   2. Create a BLE Service
+   3. Create a BLE Characteristic on the Service
+   4. Create a BLE Descriptor on the characteristic
+   5. Start the service.
+   6. Start advertising.
+
+   In this example rxValue is the data received (only accessible inside that function).
+   And txValue is the data to be sent, in this example just a byte incremented every second. 
+*/
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+
+BLEServer *pServer = NULL;
+BLECharacteristic * pTxCharacteristic;
+bool deviceConnected = false;
+bool oldDeviceConnected = false;
+uint8_t txValue = 0;
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID           "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
+#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
+#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
+
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+    }
+};
+
+class MyCallbacks: public BLECharacteristicCallbacks {
+    void onWrite(BLECharacteristic *pCharacteristic) {
+      std::string rxValue = pCharacteristic->getValue();
+
+      if (rxValue.length() > 0) {
+        Serial.println("*********");
+        Serial.print("Received Value: ");
+        for (int i = 0; i < rxValue.length(); i++)
+          Serial.print(rxValue[i]);
+
+        Serial.println();
+        Serial.println("*********");
+      }
+    }
+};
+
+
+void setup() {
+  Serial.begin(115200);
+
+  // Create the BLE Device
+  BLEDevice::init("UART Service");
+
+  // Create the BLE Server
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+
+  // Create the BLE Service
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  // Create a BLE Characteristic
+  pTxCharacteristic = pService->createCharacteristic(
+										CHARACTERISTIC_UUID_TX,
+										BLECharacteristic::PROPERTY_NOTIFY
+									);
+                      
+  pTxCharacteristic->addDescriptor(new BLE2902());
+
+  BLECharacteristic * pRxCharacteristic = pService->createCharacteristic(
+											 CHARACTERISTIC_UUID_RX,
+											BLECharacteristic::PROPERTY_WRITE
+										);
+
+  pRxCharacteristic->setCallbacks(new MyCallbacks());
+
+  // Start the service
+  pService->start();
+
+  // Start advertising
+  pServer->getAdvertising()->start();
+  Serial.println("Waiting a client connection to notify...");
+}
+
+void loop() {
+
+    if (deviceConnected) {
+        pTxCharacteristic->setValue(&txValue, 1);
+        pTxCharacteristic->notify();
+        txValue++;
+		delay(10); // bluetooth stack will go into congestion, if too many packets are sent
+	}
+
+    // disconnecting
+    if (!deviceConnected && oldDeviceConnected) {
+        delay(500); // give the bluetooth stack the chance to get things ready
+        pServer->startAdvertising(); // restart advertising
+        Serial.println("start advertising");
+        oldDeviceConnected = deviceConnected;
+    }
+    // connecting
+    if (deviceConnected && !oldDeviceConnected) {
+		// do stuff here on connecting
+        oldDeviceConnected = deviceConnected;
+    }
+}

libraries/BLE/examples/BLE_write/BLE_write.ino

@@ -0,0 +1,65 @@
+/*
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleWrite.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+*/
+
+#include <BLEDevice.h>
+#include <BLEUtils.h>
+#include <BLEServer.h>
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+
+class MyCallbacks: public BLECharacteristicCallbacks {
+    void onWrite(BLECharacteristic *pCharacteristic) {
+      std::string value = pCharacteristic->getValue();
+
+      if (value.length() > 0) {
+        Serial.println("*********");
+        Serial.print("New value: ");
+        for (int i = 0; i < value.length(); i++)
+          Serial.print(value[i]);
+
+        Serial.println();
+        Serial.println("*********");
+      }
+    }
+};
+
+void setup() {
+  Serial.begin(115200);
+
+  Serial.println("1- Download and install an BLE scanner app in your phone");
+  Serial.println("2- Scan for BLE devices in the app");
+  Serial.println("3- Connect to MyESP32");
+  Serial.println("4- Go to CUSTOM CHARACTERISTIC in CUSTOM SERVICE and write something");
+  Serial.println("5- See the magic =)");
+
+  BLEDevice::init("MyESP32");
+  BLEServer *pServer = BLEDevice::createServer();
+
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
+                                         CHARACTERISTIC_UUID,
+                                         BLECharacteristic::PROPERTY_READ |
+                                         BLECharacteristic::PROPERTY_WRITE
+                                       );
+
+  pCharacteristic->setCallbacks(new MyCallbacks());
+
+  pCharacteristic->setValue("Hello World");
+  pService->start();
+
+  BLEAdvertising *pAdvertising = pServer->getAdvertising();
+  pAdvertising->start();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  delay(2000);
+}