Fix uploader tool for ESPduino32 board (#6665)

Implemented a new method for allowing folks to preserve their TinyUF2 bootloader setup when flashing their boards via Arduino IDE, without being locked out of not using it if they want to use a different partition.

Adafruit had already added support for keeping (reflashing) the TinyUF2 bootloader when flashing via Arduino IDE (thanks @ladyada ), but the issue with it is it doesn't allow users to not choose to use it. Even if they select a specific partition scheme from the partition drop down list, it ignores that selection and only does the TinyUF2 partitioning/bootloader thing.

We wanted to let users choose between keeping their TinyUF2 partitioning and bootloader, or choose another partition scheme and have the TinyUF2 support disabled and just operate like they would expect.

We've implemented this by adding the TinyUF2 support as a partition scheme option, and using these build options in platform.txt to choose to use teh UF2 path or use the standard path.

.github/ISSUE_TEMPLATE/Feature-request.yml

@@ -0,0 +1,62 @@
+name: Feature request
+description: Suggest an idea for this project
+labels: ["Type: Feature request"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        * We welcome any ideas or feature requests! It is helpful if you can explain exactly why the feature would be useful.
+        * There are usually some outstanding feature requests in the [existing issues list](https://github.com/espressif/arduino-esp32/issues?q=is%3Aopen+is%3Aissue+label%3A%22Type%3A+Feature+request%22), feel free to add comments to them.
+        * If you would like to contribute, please read the [contributions guide](https://docs.espressif.com/projects/arduino-esp32/en/latest/contributing.html).
+  - type: input
+    id: Area
+    attributes:
+      label: Related area
+      description: Please briefly explain the area of your Feature Request.
+      placeholder: eg. Board support, specific Peripheral, BT, Wifi...
+    validations:
+      required: true
+  - type: input
+    id: HW
+    attributes:
+      label: Hardware specification
+      description: Please provide if your proposal depends on specific Hardware.
+      placeholder: eg. Support for ESP32 DevKitC, ESP32-C3 DevKitM...
+    validations:
+      required: true
+  - type: textarea
+    id: problem-related
+    attributes:
+      label: Is your feature request related to a problem?
+      description: Please provide a clear and concise description of what the problem is. Add relevant issue link.
+      placeholder: ex. I'm facing the issue/missing function...
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: Please provide a clear and concise description of what you want to happen.
+      placeholder: ex. When using this function...
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Describe alternatives you've considered
+      description: Please provide a clear and concise description of any alternative solutions or features you've considered.
+      placeholder: ex. Choosing other approach wouldn't work, because...
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Please add any other context or screenshots about the feature request here.
+      placeholder: ex. This would work only when ...
+  - type: checkboxes
+    id: confirmation
+    attributes:
+      label: I have checked existing list of Feature requests and the Contribution Guide
+      description: You agree to check all the resources above before opening a new Feature request.
+      options:
+        - label: I confirm I have checked existing list of Feature requests and Contribution Guide.
+          required: true

.github/ISSUE_TEMPLATE/Issue-report.yml

@@ -0,0 +1,132 @@
+name: Issue report
+description: Report any problem here
+labels: ["Status: Awaiting triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        * Before reporting a new issue please check and search in [List of existing issues](https://github.com/espressif/arduino-esp32/issues?q=is%3Aissue) 
+        * Please check [Online Documentation](https://docs.espressif.com/projects/arduino-esp32/en/latest/index.html)
+        * Take a look on [Troubleshooting guide](https://docs.espressif.com/projects/arduino-esp32/en/latest/troubleshooting.html)
+        * If still experiencing the issue, please provide as many details as possible below about your hardware, computer setup and code.
+  - type: input
+    id: Board
+    attributes:
+      label: Board
+      description: On which Board does this issue occur?
+      placeholder: eg. ESP32 Dev Module, ESP32-S2, LilyGo TTGO LoRa32...
+    validations:
+      required: true
+  - type: textarea
+    id: devboard
+    attributes:
+      label: Device Description
+      description: What development board or other hardware is the chip attached to?
+      placeholder: ex. DevKitC, plain module on breadboard, etc. If your hardware is custom or unusual, please attach a photo.
+    validations:
+       required: true
+  - type: textarea
+    id: other-hw
+    attributes:
+      label: Hardware Configuration
+      description: Is anything else attached to the development board?
+      placeholder: ex. GPIO 18 & 19 are connected to I2C devices.
+    validations:
+      required: true
+  - type: dropdown
+    id: version
+    attributes:
+      label: Version
+      description: What version of Arduino ESP32 are you running? If possible, consider updating to the latest version.
+      options:
+        - latest master (checkout manually)
+        - latest development Release Candidate (RC-X)
+        - v2.0.2
+        - v2.0.1
+        - v2.0.0
+        - v1.0.6
+        - other
+    validations:
+      required: true
+  - type: input
+    id: IDE
+    attributes:
+     label: IDE Name
+     description: What IDE are you using?
+     placeholder: eg. Arduino IDE, PlatformIO, Sloeber...
+    validations:
+     required: true
+  - type: input
+    id: os
+    attributes:
+      label: Operating System
+      description: On which OS does this issue occur?
+      placeholder: ex. macOS 12.1, Windows 10...
+    validations:
+      required: true
+  - type: input
+    id: Flash
+    attributes:
+      label: Flash frequency
+      description: What flash frequency is used?
+      placeholder: eg. 40Mhz
+    validations:
+      required: true
+  - type: dropdown
+    id: PSRAM 
+    attributes:
+      label: PSRAM enabled
+      description: Is PSRAM enabled?
+      options:
+        - 'yes'
+        - 'no' 
+    validations:
+      required: true
+  - type: input
+    id: Upload
+    attributes:
+      label: Upload speed
+      description: What upload speed is used?
+      placeholder: eg. 115200
+    validations:
+      required: true
+  - type: textarea
+    id: Description
+    attributes:
+      label: Description
+      description: Please describe your problem here and expected behaviour
+      placeholder: ex. Can't connect/weird behaviour/wrong function/missing parameter..
+    validations:
+      required: true
+  - type: textarea
+    id: sketch
+    attributes:
+      label: Sketch
+      description: Please provide full minimal sketch/code which can be run to reproduce your issue
+      placeholder: ex. Related part of the code to replicate the issue
+      render: cpp
+    validations:
+     required: true
+  - type: textarea
+    id: Debug
+    attributes:
+      label: Debug Message
+      description: Please provide a debug message or error message. If you have a Guru Meditation Error or Backtrace, please decode it with [ExceptionDecoder](https://github.com/me-no-dev/EspExceptionDecoder)
+      placeholder: Enable Core debug level - Debug on tools menu of Arduino IDE, then put the serial output here.
+      render: plain
+    validations:
+      required: true      
+  - type: textarea
+    id: other-remarks
+    attributes:
+      label: Other Steps to Reproduce 
+      description: Is there any other information you can think of which will help us reproduce this problem? Any additional info can be added as well.
+      placeholder: ex. I also tried on other OS, HW...it works correctly on that setup.
+  - type: checkboxes
+    id: confirmation
+    attributes:
+      label: I have checked existing issues, online documentation and the Troubleshooting Guide
+      description: You agree to check all the resources above before opening a new issue.
+      options:
+        - label: I confirm I have checked existing issues, online documentation and Troubleshooting guide.
+          required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Arduino ESP32 Gitter Channel
+    url: https://gitter.im/espressif/arduino-esp32
+    about: Community channel for questions and help
+  - name: ESP32 Forum - Arduino
+    url: https://esp32.com/viewforum.php?f=19
+    about: Official Forum for questions

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,23 @@
+*By completing this PR sufficiently, you help us to review this Pull Request quicker and also help improve the quality of Release Notes*
+
+### Checklist
+1. [ ] Please provide specific title of the PR describing the change, including the component name (*eg. „Update of Documentation link on Readme.md“*)
+2. [ ] Please provide related links (*eg. Issue which will be closed by this Pull Request*)
+3. [ ] Please **update relevant Documentation** if applicable
+4. [ ] Please check [Contributing guide](https://docs.espressif.com/projects/arduino-esp32/en/latest/contributing.html)
+
+*This entire section above can be deleted if all items are checked.*
+
+-----------
+## Description of Change
+Please describe your proposed Pull Request and it's impact.
+
+## Tests scenarios
+Please describe on what Hardware and Software combinations you have tested this Pull Request and how.
+
+(*eg. I have tested my Pull Request on Arduino-esp32 core v2.0.2 with ESP32 and ESP32-S2 Board with this scenario*)
+
+## Related links
+Please provide links to related issue, PRs etc.
+
+(*eg. Closes #number of issue*)

.github/scripts/check-cmakelists.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# This script is used in the CI workflow. 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 -P CMakeLists.txt 2>&1 | grep set\(srcs | cut -d'(' -f3 | sed 's/ )//' | sed 's/srcs //' | tr ' ;' '\n' | sort`
+
+if ! diff -u0 --label "Repo Files" --label "srcs" <(echo "$REPO_SRCS") <(echo "$CMAKE_SRCS"); then
+    echo "Source files in repo (-) and source files in CMakeLists.txt (+) don't match"
+    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 [ ! -z "$GITHUB_REPOSITORY" ];  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 +1,80 @@
+#!/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 '$OS_NAME'"
+    exit 1
+fi
+export OS_NAME
+
+if [ "$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
+

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

@@ -0,0 +1,174 @@
+#!/bin/bash
+
+export PLATFORMIO_ESP32_PATH="$HOME/.platformio/packages/framework-arduinoespressif32"
+PLATFORMIO_ESP32_URL="https://github.com/platformio/platform-espressif32.git"
+
+TOOLCHAIN_VERSION="8.4.0+2021r2-patch3"
+ESPTOOLPY_VERSION="~1.30100.0"
+ESPRESSIF_ORGANIZATION_NAME="espressif"
+
+echo "Installing Python Wheel ..."
+pip install wheel > /dev/null 2>&1
+
+echo "Installing PlatformIO ..."
+pip install -U https://github.com/platformio/platformio/archive/master.zip > /dev/null 2>&1
+
+echo "Installing Platform ESP32 ..."
+python -m platformio platform install $PLATFORMIO_ESP32_URL  > /dev/null 2>&1
+
+echo "Replacing the package versions ..."
+replace_script="import json; import os;"
+replace_script+="fp=open(os.path.expanduser('~/.platformio/platforms/espressif32/platform.json'), 'r+');"
+replace_script+="data=json.load(fp);"
+# Use framework sources from the repository
+replace_script+="data['packages']['framework-arduinoespressif32']['version'] = '*';"
+replace_script+="del data['packages']['framework-arduinoespressif32']['owner'];"
+# Use toolchain packages from the "espressif" organization
+replace_script+="data['packages']['toolchain-xtensa-esp32']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+replace_script+="data['packages']['toolchain-xtensa-esp32s2']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+replace_script+="data['packages']['toolchain-riscv32-esp']['owner']='$ESPRESSIF_ORGANIZATION_NAME';"
+# Update versions to use the upstream
+replace_script+="data['packages']['toolchain-xtensa-esp32']['version']='$TOOLCHAIN_VERSION';"
+replace_script+="data['packages']['toolchain-xtensa-esp32s2']['version']='$TOOLCHAIN_VERSION';"
+replace_script+="data['packages']['toolchain-riscv32-esp']['version']='$TOOLCHAIN_VERSION';"
+# Add ESP32-S3 Toolchain
+replace_script+="data['packages'].update({'toolchain-xtensa-esp32s3':{'type':'toolchain','optional':True,'owner':'$ESPRESSIF_ORGANIZATION_NAME','version':'$TOOLCHAIN_VERSION'}});"
+replace_script+="data['packages']['toolchain-xtensa-esp32'].update({'optional':False});"
+# esptool.py may require an upstream version (for now platformio is the owner)
+replace_script+="data['packages']['tool-esptoolpy']['version']='$ESPTOOLPY_VERSION';"
+# Save results
+replace_script+="fp.seek(0);fp.truncate();json.dump(data, fp, indent=2);fp.close()"
+python -c "$replace_script"
+
+if [ "$GITHUB_REPOSITORY" == "espressif/arduino-esp32" ];  then
+    echo "Linking Core..."
+    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 +1,143 @@
+#/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 $?
+}
+
+git_safe_upload_to_pages "index.md" "README.md"
+
+# At some point github stopped providing a list of edited file
+# but we also stopped havong documentation in md format,
+# so we can skip this portion safely and update just the index
+
+# EVENT_JSON=`cat $GITHUB_EVENT_PATH`
+
+# echo "GITHUB_EVENT_PATH: $GITHUB_EVENT_PATH"
+# echo "EVENT_JSON: $EVENT_JSON"
+
+# pages_added=`echo "$EVENT_JSON" | jq -r '.commits[].added[]'`
+# echo "added: $pages_added"
+# pages_modified=`echo "$EVENT_JSON" | jq -r '.commits[].modified[]'`
+# echo "modified: $pages_modified"
+# pages_removed=`echo "$EVENT_JSON" | jq -r '.commits[].removed[]'`
+# echo "removed: $pages_removed"
+
+# for page in $pages_added; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Adding '$page' to pages ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_safe_upload_to_pages "index.md" "README.md"
+#     else
+#         git_safe_upload_to_pages "$page" "$page"
+#     fi
+# done
+
+# for page in $pages_modified; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Modifying '$page' ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_safe_upload_to_pages "index.md" "README.md"
+#     else
+#         git_safe_upload_to_pages "$page" "$page"
+#     fi
+# done
+
+# for page in $pages_removed; do
+#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
+#         continue
+#     fi
+#     echo "Removing '$page' from pages ..."
+#     if [[ $page == "README.md" ]]; then
+#         git_remove_from_pages "README.md" > /dev/null
+#     else
+#         git_remove_from_pages "$page" > /dev/null
+#     fi
+# done
+
+echo
+echo "DONE!"

.github/scripts/on-push.sh

@@ -0,0 +1,119 @@
+#!/bin/bash
+
+set -e
+
+export ARDUINO_BUILD_DIR="$HOME/.arduino/build.tmp"
+
+function build(){
+    local target=$1
+    local fqbn=$2
+    local chunk_index=$3
+    local chunks_cnt=$4
+    local sketches=$5
+
+    local BUILD_SKETCH="${SCRIPTS_DIR}/sketch_utils.sh build"
+    local BUILD_SKETCHES="${SCRIPTS_DIR}/sketch_utils.sh chunk_build"
+
+    local args="$ARDUINO_IDE_PATH $ARDUINO_USR_PATH"
+
+    args+=" \"$fqbn\""
+
+    if [ "$OS_IS_LINUX" == "1" ]; then
+        args+=" $target"
+        args+=" $ARDUINO_ESP32_PATH/libraries"
+        args+=" $chunk_index $chunks_cnt"
+        ${BUILD_SKETCHES} ${args}
+    else
+        if [ "$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"
+            args+=" ${win_opts}"
+        fi
+
+        for sketch in ${sketches}; do
+            ${BUILD_SKETCH} ${args} ${sketch}
+        done
+    fi
+}
+
+if [ -z "$GITHUB_WORKSPACE" ]; then
+    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 "$CHUNKS_CNT" ] &&  [ "$CHUNKS_CNT" -ge 2 ]; 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
+
+SCRIPTS_DIR="./.github/scripts"
+if [ "$BUILD_PIO" -eq 0 ]; then
+    source ${SCRIPTS_DIR}/install-arduino-ide.sh
+    source ${SCRIPTS_DIR}/install-arduino-core-esp32.sh
+
+    FQBN_ESP32="espressif:esp32:esp32:PSRAM=enabled,PartitionScheme=huge_app"
+    FQBN_ESP32S2="espressif:esp32:esp32s2:PSRAM=enabled,PartitionScheme=huge_app"
+    FQBN_ESP32S3="espressif:esp32:esp32s3:PSRAM=opi,USBMode=default,PartitionScheme=huge_app"
+    FQBN_ESP32C3="espressif:esp32:esp32c3:PartitionScheme=huge_app"
+
+    SKETCHES_ESP32="\
+      $ARDUINO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino\
+      $ARDUINO_ESP32_PATH/libraries/BLE/examples/BLE_server/BLE_server.ino\
+      $ARDUINO_ESP32_PATH/libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino\
+    "
+
+    SKETCHES_ESP32XX="\
+      $ARDUINO_ESP32_PATH/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino\
+      $ARDUINO_ESP32_PATH/libraries/WiFi/examples/WiFiClient/WiFiClient.ino\
+    "
+
+    build "esp32s3" $FQBN_ESP32S3 $CHUNK_INDEX $CHUNKS_CNT $SKETCHES_ESP32
+    build "esp32s2" $FQBN_ESP32S2 $CHUNK_INDEX $CHUNKS_CNT $SKETCHES_ESP32XX
+    build "esp32c3" $FQBN_ESP32C3 $CHUNK_INDEX $CHUNKS_CNT $SKETCHES_ESP32XX
+    build "esp32" $FQBN_ESP32 $CHUNK_INDEX $CHUNKS_CNT $SKETCHES_ESP32
+else
+    source ${SCRIPTS_DIR}/install-platformio-esp32.sh
+    # PlatformIO ESP32 Test
+    BOARD="esp32dev"
+    OPTIONS="board_build.partitions = huge_app.csv"
+    build_pio_sketch "$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"
+    python -m platformio ci --board "$BOARD" "$PLATFORMIO_ESP32_PATH/libraries/WiFi/examples/WiFiClient" --project-option="board_build.mcu = esp32c3" --project-option="board_build.partitions = huge_app.csv"
+
+    echo "Hacking in S3 support ..."
+    replace_script="import json; import os;"
+    replace_script+="fp=open(os.path.expanduser('~/.platformio/platforms/espressif32/platform.json'), 'r+');"
+    replace_script+="data=json.load(fp);"
+    replace_script+="data['packages']['toolchain-xtensa-esp32']['optional']=True;"
+    replace_script+="data['packages']['toolchain-xtensa-esp32s3']['optional']=False;"
+    replace_script+="data['packages']['tool-esptoolpy']['owner']='tasmota';"
+    replace_script+="data['packages']['tool-esptoolpy']['version']='https://github.com/tasmota/esptool/releases/download/v3.3/esptool-3.3.zip';"
+    replace_script+="fp.seek(0);fp.truncate();json.dump(data, fp, indent=2);fp.close()"
+    python -c "$replace_script"
+
+    python -m platformio ci --board "$BOARD" "$PLATFORMIO_ESP32_PATH/libraries/WiFi/examples/WiFiClient" --project-option="board_build.mcu = esp32s3" --project-option="board_build.partitions = huge_app.csv"
+
+    #build_pio_sketches "$BOARD" "$OPTIONS" "$PLATFORMIO_ESP32_PATH/libraries"
+fi

.github/scripts/on-release.sh

@@ -0,0 +1,405 @@
+#!/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  "$GITHUB_WORKSPACE/package.json"            "$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/"
+cp -f  $GITHUB_WORKSPACE/tools/platformio-build*.py "$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$extent/g" | \
+sed 's/runtime.tools.xtensa-esp32-elf-gcc.path={runtime.platform.path}\/tools\/xtensa-esp32-elf//g' | \
+sed 's/runtime.tools.xtensa-esp32s2-elf-gcc.path={runtime.platform.path}\/tools\/xtensa-esp32s2-elf//g' | \
+sed 's/tools.esptool_py.path={runtime.platform.path}\/tools\/esptool/tools.esptool_py.path=\{runtime.tools.esptool_py.path\}/g' \
+ > "$PKG_DIR/platform.txt"
+
+# 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(.published_at | - fromdateiso8601) | .[0].tag_name")
+prev_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false)) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
+prev_branch_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
+prev_branch_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[0].tag_name")
+shopt -s nocasematch
+if [ "$prev_release" == "$RELEASE_TAG" ]; then
+    prev_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false)) | sort_by(.published_at | - fromdateiso8601) | .[1].tag_name")
+fi
+if [ "$prev_any_release" == "$RELEASE_TAG" ]; then
+    prev_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false)) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
+fi
+if [ "$prev_branch_release" == "$RELEASE_TAG" ]; then
+    prev_branch_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .prerelease == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
+fi
+if [ "$prev_branch_any_release" == "$RELEASE_TAG" ]; then
+    prev_branch_any_release=$(echo "$releasesJson" | jq -e -r ". | map(select(.draft == false and .target_commitish == \"$RELEASE_BRANCH\")) | sort_by(.published_at | - fromdateiso8601)  | .[1].tag_name")
+fi
+shopt -u nocasematch
+set -e
+
+echo "Previous Release: $prev_release"
+echo "Previous (any)release: $prev_any_release"
+echo
+
+# Merge package JSONs with previous releases
+if [ ! -z "$prev_any_release" ] && [ "$prev_any_release" != "null" ]; then
+    echo "Merging with JSON from $prev_any_release ..."
+    merge_package_json "$prev_any_release/$PACKAGE_JSON_DEV" "$OUTPUT_DIR/$PACKAGE_JSON_DEV"
+fi
+
+if [ "$RELEASE_PRE" == "false" ]; then
+    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
+
+# 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
+echo
+echo "Previous Branch Release: $prev_branch_release"
+echo "Previous Branch (any)release: $prev_branch_any_release"
+echo
+commitFile="$OUTPUT_DIR/commits.txt"
+COMMITS_SINCE_RELEASE="$prev_branch_any_release"
+if [ "$RELEASE_PRE" == "false" ]; then
+    COMMITS_SINCE_RELEASE="$prev_branch_release"
+fi
+if [ ! -z "$COMMITS_SINCE_RELEASE" ] && [ "$COMMITS_SINCE_RELEASE" != "null" ]; then
+    echo "Getting commits since $COMMITS_SINCE_RELEASE ..."
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 "$COMMITS_SINCE_RELEASE..HEAD" > "$commitFile"
+elif [ "$RELEASE_BRANCH" != "master" ]; then
+    echo "Getting all commits on branch '$RELEASE_BRANCH' ..."
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 --cherry-pick --left-only --no-merges HEAD...origin/master > "$commitFile"
+else
+    echo "Getting all commits on master ..."
+    git -C "$GITHUB_WORKSPACE" log --oneline -n 500 --no-merges > "$commitFile"
+fi
+releaseNotes+=$'\r\n##### Commits\r\n'
+IFS=$'\n'
+for next in `cat $commitFile`
+do
+    IFS=' ' read -r commitId commitMsg <<< "$next"
+    commitLine="- [$commitId](https://github.com/$GITHUB_REPOSITORY/commit/$commitId) $commitMsg"
+    releaseNotes+="$commitLine"
+    releaseNotes+=$'\r\n'
+done
+rm -f $commitFile
+
+# Prepend the original release body
+if [ "${RELEASE_BODY: -1}" == $'\r' ]; then
+    RELEASE_BODY="${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/scripts/sketch_utils.sh

@@ -0,0 +1,192 @@
+#!/bin/bash
+
+function build_sketch(){ # build_sketch <ide_path> <user_path> <fqbn> <path-to-ino> [extra-options]
+    if [ "$#" -lt 4 ]; then
+        echo "ERROR: Illegal number of parameters"
+        echo "USAGE: ${0} build <ide_path> <user_path> <fqbn> <path-to-ino> [extra-options]"
+        return 1
+    fi
+
+    local ide_path=$1
+    local usr_path=$2
+    local fqbn=$3
+    local sketch=$4
+    local xtra_opts=$5
+    local win_opts=$6
+
+    ARDUINO_CACHE_DIR="$HOME/.arduino/cache.tmp"
+    if [ -z "$ARDUINO_BUILD_DIR" ]; then
+        build_dir="$(dirname $sketch)/build"
+    else
+        build_dir="$ARDUINO_BUILD_DIR"
+    fi
+
+    echo $sketch
+
+    rm -rf "$build_dir"
+    mkdir -p "$build_dir"
+    mkdir -p "$ARDUINO_CACHE_DIR"
+    $ide_path/arduino-builder -compile -logger=human -core-api-version=10810 \
+        -fqbn=$fqbn \
+        -warnings="all" \
+        -tools "$ide_path/tools-builder" \
+        -tools "$ide_path/tools" \
+        -built-in-libraries "$ide_path/libraries" \
+        -hardware "$ide_path/hardware" \
+        -hardware "$usr_path/hardware" \
+        -libraries "$usr_path/libraries" \
+        -build-cache "$ARDUINO_CACHE_DIR" \
+        -build-path "$build_dir" \
+        $win_opts $xtra_opts "$sketch"
+}
+
+function count_sketches(){ # count_sketches <path> [target]
+    local path=$1
+    local target=$2
+
+    if [ $# -lt 1 ]; then
+      echo "ERROR: Illegal number of parameters"
+      echo "USAGE: ${0} count <path> [target]"
+    fi
+
+    rm -rf sketches.txt
+    if [ ! -d "$path" ]; then
+        touch sketches.txt
+        return 0
+    fi
+
+    local sketches=$(find $path -name *.ino | sort)
+    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
+        elif [[ -n $target ]] && [[ -f "$sketchdir/.skip.$target" ]]; then
+            continue
+        else
+            echo $sketch >> sketches.txt
+            sketchnum=$(($sketchnum + 1))
+        fi
+    done
+    return $sketchnum
+}
+
+function build_sketches(){ # build_sketches <ide_path> <user_path> <fqbn> <target> <path> <chunk> <total-chunks> [extra-options]
+    local ide_path=$1
+    local usr_path=$2
+    local fqbn=$3
+    local target=$4
+    local path=$5
+    local chunk_idex=$6
+    local chunks_num=$7
+    local xtra_opts=$8
+
+    if [ "$#" -lt 7 ]; then
+        echo "ERROR: Illegal number of parameters"
+        echo "USAGE: ${0} chunk_build <ide_path> <user_path> <fqbn> <target> <path> [<chunk> <total-chunks>] [extra-options]"
+        return 1
+    fi
+
+    if [ "$chunks_num" -le 0 ]; then
+        echo "ERROR: Chunks count must be positive number"
+        return 1
+    fi
+    if [ "$chunk_idex" -ge "$chunks_num" ] && [ "$chunks_num" -ge 2 ]; then
+        echo "ERROR: Chunk index must be less than chunks count"
+        return 1
+    fi
+
+    set +e
+    count_sketches "$path" "$target"
+    local sketchcount=$?
+    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 "$sketchcount" ]; then
+        chunk_size=$(( $chunk_size + 1 ))
+    fi
+
+    local start_index=0
+    local end_index=0
+    if [ "$chunk_idex" -ge "$chunks_num" ]; then
+        start_index=$chunk_idex
+        end_index=$sketchcount
+    else
+        start_index=$(( $chunk_idex * $chunk_size ))
+        if [ "$sketchcount" -le "$start_index" ]; then
+            echo "Skipping job"
+            return 0
+        fi
+
+        end_index=$(( $(( $chunk_idex + 1 )) * $chunk_size ))
+        if [ "$end_index" -gt "$sketchcount" ]; then
+            end_index=$sketchcount
+        fi
+    fi
+
+    local start_num=$(( $start_index + 1 ))
+    echo "Found $sketchcount Sketches for target '$target'";
+    echo "Chunk Index : $chunk_idex"
+    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 $sketch)
+        sketchnum=$(($sketchnum + 1))
+        if [ "$sketchnum" -le "$start_index" ] \
+        || [ "$sketchnum" -gt "$end_index" ]; then
+            continue
+        fi
+        echo ""
+        echo "Building Sketch Index $(($sketchnum - 1)) - $sketchdirname"
+        build_sketch "$ide_path" "$usr_path" "$fqbn" "$sketch" "$xtra_opts"
+        local result=$?
+        if [ $result -ne 0 ]; then
+            return $result
+        fi
+    done
+    return 0
+}
+
+USAGE="
+USAGE: ${0} [command] [options]
+Available commands:
+  count: Count sketches.
+  build: Build a sketch.
+  chunk_build: Build a chunk of sketches.
+"
+
+cmd=$1
+shift
+if [ -z $cmd ]; then
+  echo "ERROR: No command supplied"
+  echo "$USAGE"
+  exit 2
+fi
+
+case "$cmd" in
+  "count")
+    count_sketches $*
+    ;;
+  "build")
+    build_sketch $*
+    ;;
+  "chunk_build")
+    build_sketches $*
+    ;;
+  *)
+    echo "ERROR: Unrecognized command"
+    echo "$USAGE"
+    exit 2
+esac
+

.github/scripts/tests_build.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+SCRIPTS_DIR="./.github/scripts"
+BUILD_CMD=""
+
+if [ $# -eq 3 ]; then
+    chunk_build=1
+elif [ $# -eq 2 ]; then
+    chunk_build=0
+else
+  echo "ERROR: Illegal number of parameters"
+  echo "USAGE:
+        ${0} <target> <sketch_dir>
+        ${0} <target> <chunk> <total_chunks>
+        "
+  exit 0
+fi
+
+target=$1
+
+case "$target" in
+    "esp32") fqbn="espressif:esp32:esp32:PSRAM=enabled,PartitionScheme=huge_app"
+    ;;
+    "esp32s2") fqbn="espressif:esp32:esp32s2:PSRAM=enabled,PartitionScheme=huge_app"
+    ;;
+    "esp32c3") fqbn="espressif:esp32:esp32c3:PartitionScheme=huge_app"
+    ;;
+    "esp32s3") fqbn="espressif:esp32:esp32s3:PSRAM=opi,USBMode=default,PartitionScheme=huge_app"
+    ;;
+esac
+
+if [ -z $fqbn ]; then
+  echo "Unvalid chip $1"
+  exit 0
+fi
+
+source ${SCRIPTS_DIR}/install-arduino-ide.sh
+source ${SCRIPTS_DIR}/install-arduino-core-esp32.sh
+
+args="$ARDUINO_IDE_PATH $ARDUINO_USR_PATH \"$fqbn\""
+
+if [ $chunk_build -eq 1 ]; then
+    chunk_index=$2
+    chunk_max=$3
+
+    if [ "$chunk_index" -gt "$chunk_max" ] &&  [ "$chunk_max" -ge 2 ]; then
+        chunk_index=$chunk_max
+    fi
+    BUILD_CMD="${SCRIPTS_DIR}/sketch_utils.sh chunk_build"
+    args+=" $target $PWD/tests $chunk_index $chunk_max"
+else
+    sketchdir=$2
+    BUILD_CMD="${SCRIPTS_DIR}/sketch_utils.sh build"
+    args+=" $PWD/tests/$sketchdir/$sketchdir.ino"
+fi
+
+${BUILD_CMD} ${args}
+

.github/scripts/tests_run.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+target=$1
+chunk_idex=$2
+chunks_num=$3
+
+SCRIPTS_DIR="./.github/scripts"
+COUNT_SKETCHES="${SCRIPTS_DIR}/sketch_utils.sh count"
+
+source ${SCRIPTS_DIR}/install-arduino-ide.sh
+
+if [ "$chunks_num" -le 0 ]; then
+    echo "ERROR: Chunks count must be positive number"
+    return 1
+fi
+if [ "$chunk_idex" -ge "$chunks_num" ] && [ "$chunks_num" -ge 2 ]; then
+    echo "ERROR: Chunk index must be less than chunks count"
+    return 1
+fi
+
+set +e
+${COUNT_SKETCHES} $PWD/tests $target
+sketchcount=$?
+set -e
+sketches=$(cat sketches.txt)
+rm -rf sketches.txt
+
+chunk_size=$(( $sketchcount / $chunks_num ))
+all_chunks=$(( $chunks_num * $chunk_size ))
+if [ "$all_chunks" -lt "$sketchcount" ]; then
+    chunk_size=$(( $chunk_size + 1 ))
+fi
+
+start_index=0
+end_index=0
+if [ "$chunk_idex" -ge "$chunks_num" ]; then
+    start_index=$chunk_idex
+    end_index=$sketchcount
+else
+    start_index=$(( $chunk_idex * $chunk_size ))
+    if [ "$sketchcount" -le "$start_index" ]; then
+        echo "Skipping job"
+        return 0
+    fi
+
+    end_index=$(( $(( $chunk_idex + 1 )) * $chunk_size ))
+    if [ "$end_index" -gt "$sketchcount" ]; then
+        end_index=$sketchcount
+    fi
+fi
+
+start_num=$(( $start_index + 1 ))
+sketchnum=0
+
+for sketch in $sketches; do
+    sketchdir=$(dirname $sketch)
+    sketchdirname=$(basename $sketchdir)
+    sketchname=$(basename $sketch)
+    sketchnum=$(($sketchnum + 1))
+    if [ "$sketchnum" -le "$start_index" ] \
+    || [ "$sketchnum" -gt "$end_index" ]; then
+        continue
+    fi
+    echo ""
+    echo "Test for Sketch Index $(($sketchnum - 1)) - $sketchdirname"
+    pytest tests -k test_$sketchdirname --junit-xml=tests/$sketchdirname/$sketchdirname.xml
+    result=$?
+    if [ $result -ne 0 ]; then
+        return $result
+    fi
+done

.github/scripts/update-version.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# For reference: add tools for all boards by replacing one line in each board
+# "[board].upload.tool=esptool_py" to "[board].upload.tool=esptool_py\n[board].upload.tool.default=esptool_py\n[board].upload.tool.network=esp_ota"
+#cat boards.txt | sed "s/\([a-zA-Z0-9_\-]*\)\.upload\.tool\=esptool_py/\1\.upload\.tool\=esptool_py\\n\1\.upload\.tool\.default\=esptool_py\\n\1\.upload\.tool\.network\=esp_ota/"
+
+if [ ! $# -eq 3 ]; then
+	echo "Bad number of arguments: $#" >&2
+	echo "usage: $0 <major> <minor> <patch>" >&2
+	exit 1
+fi
+
+re='^[0-9]+$'
+if [[ ! $1 =~ $re ]] || [[ ! $2 =~ $re ]] || [[ ! $3 =~ $re ]] ; then
+	echo "error: Not a valid version: $1.$2.$3" >&2
+	echo "usage: $0 <major> <minor> <patch>" >&2
+	exit 1
+fi
+
+ESP_ARDUINO_VERSION_MAJOR="$1"
+ESP_ARDUINO_VERSION_MINOR="$2"
+ESP_ARDUINO_VERSION_PATCH="$3"
+ESP_ARDUINO_VERSION="$ESP_ARDUINO_VERSION_MAJOR.$ESP_ARDUINO_VERSION_MINOR.$ESP_ARDUINO_VERSION_PATCH"
+
+echo "New Arduino Version: $ESP_ARDUINO_VERSION"
+
+echo "Updating platform.txt..."
+cat platform.txt | sed "s/version=.*/version=$ESP_ARDUINO_VERSION/g" > __platform.txt && mv __platform.txt platform.txt
+
+echo "Updating package.json..."
+cat package.json | sed "s/.*\"version\":.*/  \"version\": \"$ESP_ARDUINO_VERSION\",/g" > __package.json && mv __package.json package.json
+
+echo "Updating cores/esp32/esp_arduino_version.h..."
+cat cores/esp32/esp_arduino_version.h | \
+sed "s/#define ESP_ARDUINO_VERSION_MAJOR.*/#define ESP_ARDUINO_VERSION_MAJOR   $ESP_ARDUINO_VERSION_MAJOR/g" | \
+sed "s/#define ESP_ARDUINO_VERSION_MINOR.*/#define ESP_ARDUINO_VERSION_MINOR   $ESP_ARDUINO_VERSION_MINOR/g" | \
+sed "s/#define ESP_ARDUINO_VERSION_PATCH.*/#define ESP_ARDUINO_VERSION_PATCH   $ESP_ARDUINO_VERSION_PATCH/g" > __esp_arduino_version.h && mv __esp_arduino_version.h cores/esp32/esp_arduino_version.h
+
+exit 0

.github/workflows/docs.yml

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

.github/workflows/gh-pages.yml

@@ -0,0 +1,23 @@
+name: GitHub Pages CI
+
+on:
+  push:
+    branches:
+    - master
+    - pages
+    paths:
+    - 'README.md'
+    - '.github/scripts/on-pages.sh'
+    - '.github/workflows/gh-pages.yml'
+
+jobs:
+
+  build-pages:
+    name: Build GitHub Pages
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Copy Files
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: bash ./.github/scripts/on-pages.sh

.github/workflows/hil.yml

@@ -0,0 +1,121 @@
+name: Run tests in hardware
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, labeled]
+
+  schedule:
+    - cron: '0 2 * * *'
+
+env:
+  MAX_CHUNKS: 15
+
+concurrency:
+  group: hil-${{github.event.pull_request.number || github.ref}}
+  cancel-in-progress: true
+
+jobs:
+  gen_chunks:
+    if: |
+      contains(github.event.pull_request.labels.*.name, 'hil_test') ||
+      github.event_name == 'schedule'
+    name: Generate Chunks matrix
+    runs-on: ubuntu-latest
+    outputs:
+      chunks: ${{ steps.gen-chunks.outputs.chunks }}
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Generate Chunks matrix
+        id: gen-chunks
+        run: |
+          set +e
+          bash .github/scripts/sketch_utils.sh count tests
+          sketches=$((? - 1))
+          if [[ $sketches -gt ${{env.MAX_CHUNKS}} ]]; then
+            $sketches=${{env.MAX_CHUNKS}}
+          fi
+          set -e
+          rm sketches.txt
+          CHUNKS=$(jq -c -n '$ARGS.positional' --args `seq 0 1 $sketches`)
+          echo "::set-output name=chunks::${CHUNKS}"
+
+  Build:
+    needs: gen_chunks
+    name: ${{matrix.chip}}-Build#${{matrix.chunks}}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        chip: ['esp32', 'esp32s2', 'esp32s3', 'esp32c3']
+        chunks: ${{fromJson(needs.gen_chunks.outputs.chunks)}}
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Build sketches
+        run: |
+          bash .github/scripts/tests_build.sh ${{matrix.chip}} ${{matrix.chunks}} ${{env.MAX_CHUNKS}}
+      - name: Upload ${{matrix.chip}}-${{matrix.chunks}} artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{matrix.chip}}-${{matrix.chunks}}.artifacts
+          path: |
+             tests/*/build/*.bin
+             tests/*/build/*.json
+  Test:
+    needs: [gen_chunks, Build]
+    name: ${{matrix.chip}}-Test#${{matrix.chunks}}
+    runs-on:
+      - ESP32
+      - ESP32-S2
+      - ESP32-S3
+      - ESP32-C3
+
+    strategy:
+      fail-fast: false
+      matrix:
+        chip: ['esp32', 'esp32s2', 'esp32s3', 'esp32c3']
+        chunks: ${{fromJson(needs.gen_chunks.outputs.chunks)}}
+    container:
+      image: python:3.10.1-bullseye
+      options: --privileged
+
+    steps:
+       - name: Checkout repository
+         uses: actions/checkout@v2
+
+       - name: Download ${{matrix.chip}}-${{matrix.chunks}} artifacts
+         uses: actions/download-artifact@v2
+         with:
+           name: ${{matrix.chip}}-${{matrix.chunks}}.artifacts
+           path: tests/
+
+       - name: Install dependencies
+         run: |
+           pip install -U pip
+           pip install -r tests/requirements.txt
+
+       - name: Run Tests
+         run: |
+           bash .github/scripts/tests_run.sh ${{matrix.chip}} ${{matrix.chunks}} ${{env.MAX_CHUNKS}}
+
+       - name: Upload test result artifacts
+         uses: actions/upload-artifact@v2
+         if: always()
+         with:
+           name: test_results-${{matrix.chip}}-${{matrix.chunks}}
+           path: tests/*/*.xml
+
+  event_file:
+    name: "Event File"
+    if: ${{ always() }}
+    needs: Test
+    runs-on: ubuntu-latest
+    steps:
+       - name: Upload
+         uses: actions/upload-artifact@v2
+         with:
+           name: Event File
+           path: ${{github.event_path}}

.github/workflows/publish.yml

@@ -0,0 +1,38 @@
+name: Unit Test Results
+
+on:
+  workflow_run:
+    workflows: [Run tests in hardware]
+    branches-ignore: [master]
+
+    types:
+      - completed
+
+jobs:
+  unit-test-results:
+    name: Unit Test Results
+    runs-on: ubuntu-latest
+    if: |
+      github.event.workflow_run.event == 'pull_request' &&
+      (github.event.workflow_run.conclusion == 'success' ||
+       github.event.workflow_run.conclusion == 'failure')
+    steps:
+      - name: Download and Extract Artifacts
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+        run: |
+          mkdir -p artifacts && cd artifacts
+          artifacts_url=${{ github.event.workflow_run.artifacts_url }}
+          gh api "$artifacts_url" -q '.artifacts[] | [.name, .archive_download_url] | @tsv' | while read artifact
+          do
+            IFS=$'\t' read name url <<< "$artifact"
+            gh api $url > "$name.zip"
+            unzip -d "$name" "$name.zip"
+          done
+      - name: Publish Unit Test Results
+        uses: EnricoMi/publish-unit-test-result-action@v1
+        with:
+          commit: ${{ github.event.workflow_run.head_sha }}
+          event_file: artifacts/Event File/event.json
+          event_name: ${{ github.event.workflow_run.event }}
+          files: "artifacts/**/*.xml"

.github/workflows/push.yml

@@ -0,0 +1,107 @@
+name: ESP32 Arduino CI
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+    - master
+    - release/*
+  pull_request:
+
+concurrency:
+  group: build-${{github.event.pull_request.number || github.ref}}
+  cancel-in-progress: true
+
+jobs:
+
+  cmake-check:
+    name: Check cmake file
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: bash ./.github/scripts/check-cmakelists.sh
+
+  # 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@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Cache tools
+      id: cache-linux
+      uses: actions/cache@v2
+      with:
+        path: |
+          ./tools/dist
+          ~/arduino_ide
+        key: ${{ runner.os }}-${{ hashFiles('package/package_esp32_index.template.json',
+                                            'tools/get.py',
+                                            '.github/scripts/install-arduino-ide.sh') }}
+    - 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@v2
+    - uses: actions/setup-python@v2
+      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@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Build Sketches
+      run: bash ./.github/scripts/on-push.sh 1 1 #equal and non-zero to trigger PIO
+
+  build-esp-idf-component:
+    name: Build with ESP-IDF ${{ matrix.idf_ver }} for ${{ matrix.idf_target }}
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        # The version names here correspond to the versions of espressif/idf Docker image.
+        # See https://hub.docker.com/r/espressif/idf/tags and
+        # https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-docker-image.html
+        # for details.
+        idf_ver: ["release-v4.4"]
+        idf_target: ["esp32", "esp32s2", "esp32s3", "esp32c3"]
+    container: espressif/idf:${{ matrix.idf_ver }}
+    steps:
+      - name: Check out arduino-esp32 as a component
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+          path: components/arduino-esp32
+      - name: Build
+        env:
+          IDF_TARGET: ${{ matrix.idf_target }}
+        shell: bash
+        run: |
+          . ${IDF_PATH}/export.sh
+          idf.py create-project test
+          idf.py -C test -DEXTRA_COMPONENT_DIRS=$PWD/components build

.github/workflows/release.yml

@@ -0,0 +1,22 @@
+name: ESP32 Arduino Release
+
+on:
+  release:
+    types: published
+
+jobs:
+  build:
+    name: Publish Release
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Build Release
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: bash ./.github/scripts/on-release.sh

.github/workflows/upload-idf-component.yml

@@ -0,0 +1,19 @@
+name: Push components to https://components.espressif.com
+on:
+  push:
+    tags:
+      - v*
+jobs:
+  upload_components:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: "recursive"
+
+      - name: Upload components to the component registry
+        uses: espressif/github-actions/upload_components@master
+        with:
+          name: arduino-esp32
+          namespace: espressif
+          api_token: ${{ secrets.IDF_COMPONENT_API_TOKEN }}

.gitignore

@@ -1,7 +1,28 @@
 tools/xtensa-esp32-elf
+tools/xtensa-esp32s2-elf
+tools/xtensa-esp32s3-elf
+tools/riscv32-esp-elf
 tools/dist
 tools/esptool
 tools/esptool.exe
-tools/mkspiffs/mkspiffs
-tools/mkspiffs/mkspiffs.exe
+tools/mkspiffs
+tools/mklittlefs
+tools/mkfatfs.exe
 .DS_Store
+ 
+#Ignore files built by Visual Studio/Visual Micro
+[Dd]ebug*/
+[Rr]elease*/
+.vs/
+__vm/
+*.vcxproj*
+.vscode/
+platform.sloeber.txt
+boards.sloeber.txt
+
+# Ignore docs build (Sphinx)
+docs/build
+docs/source/_build
+
+# Test log files
+*.log

.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

@@ -1,36 +0,0 @@
-sudo: false
-
-language: python
-python:
-  - "2.7"
-
-os:
-  - linux
-
-env:
-    global:
-        - 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:
-  provider: script
-  skip_cleanup: true
-  script: bash $TRAVIS_BUILD_DIR/tools/deploy.sh -t$TRAVIS_TAG -a$ESP32_GITHUB_TOKEN -s$TRAVIS_REPO_SLUG -drelease
-
-  on:
-    tags: true
-
-
-notifications:
-  email:
-    on_success: change
-    on_failure: change
-  webhooks:
-    urls:
-        - https://webhooks.gitter.im/e/cb057279c430d91a47a8
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always

CMakeLists.txt

@@ -1,11 +1,37 @@
+# Check ESP-IDF version and error out if it is not in the supported range.
+#
+# Note for arduino-esp32 developers: to bypass the version check locally,
+# set ARDUINO_SKIP_IDF_VERSION_CHECK environment variable to 1. For example:
+#   export ARDUINO_SKIP_IDF_VERSION_CHECK=1
+#   idf.py build
+
+set(min_supported_idf_version "4.4.0")
+set(max_supported_idf_version "4.4.99")
+set(idf_version "${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}.${IDF_VERSION_PATCH}")
+
+if ("${idf_version}" AND NOT "$ENV{ARDUINO_SKIP_IDF_VERSION_CHECK}")
+  if (idf_version VERSION_LESS min_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but an older version is detected: ${idf_version}.")
+  endif()
+  if (idf_version VERSION_GREATER max_supported_idf_version)
+    message(FATAL_ERROR "Arduino-esp32 can be used with ESP-IDF versions "
+                        "between ${min_supported_idf_version} and ${max_supported_idf_version}, "
+                        "but a newer version is detected: ${idf_version}.")
+  endif()
+endif()
+
 set(CORE_SRCS
   cores/esp32/base64.cpp
   cores/esp32/cbuf.cpp
   cores/esp32/esp32-hal-adc.c
   cores/esp32/esp32-hal-bt.c
+  cores/esp32/esp32-hal-cpu.c
   cores/esp32/esp32-hal-dac.c
   cores/esp32/esp32-hal-gpio.c
   cores/esp32/esp32-hal-i2c.c
+  cores/esp32/esp32-hal-i2c-slave.c
   cores/esp32/esp32-hal-ledc.c
   cores/esp32/esp32-hal-matrix.c
   cores/esp32/esp32-hal-misc.c
@@ -14,19 +40,30 @@ 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
   cores/esp32/Esp.cpp
+  cores/esp32/FunctionalInterrupt.cpp
   cores/esp32/HardwareSerial.cpp
   cores/esp32/IPAddress.cpp
   cores/esp32/IPv6Address.cpp
   cores/esp32/libb64/cdecode.c
   cores/esp32/libb64/cencode.c
+  cores/esp32/main.cpp
   cores/esp32/MD5Builder.cpp
   cores/esp32/Print.cpp
   cores/esp32/stdlib_noniso.c
   cores/esp32/Stream.cpp
   cores/esp32/StreamString.cpp
+  cores/esp32/Tone.cpp
+  cores/esp32/HWCDC.cpp
+  cores/esp32/USB.cpp
+  cores/esp32/USBCDC.cpp
+  cores/esp32/USBMSC.cpp
+  cores/esp32/FirmwareMSC.cpp
+  cores/esp32/firmware_msc_fat.c
   cores/esp32/wiring_pulse.c
   cores/esp32/wiring_shift.c
   cores/esp32/WMath.cpp
@@ -37,14 +74,27 @@ set(LIBRARY_SRCS
   libraries/ArduinoOTA/src/ArduinoOTA.cpp
   libraries/AsyncUDP/src/AsyncUDP.cpp
   libraries/BluetoothSerial/src/BluetoothSerial.cpp
+  libraries/BluetoothSerial/src/BTAddress.cpp
+  libraries/BluetoothSerial/src/BTAdvertisedDeviceSet.cpp
+  libraries/BluetoothSerial/src/BTScanResultsSet.cpp
   libraries/DNSServer/src/DNSServer.cpp
-  libraries/EEPROM/EEPROM.cpp
+  libraries/EEPROM/src/EEPROM.cpp
   libraries/ESPmDNS/src/ESPmDNS.cpp
+  libraries/Ethernet/src/ETH.cpp
+  libraries/FFat/src/FFat.cpp
   libraries/FS/src/FS.cpp
   libraries/FS/src/vfs_api.cpp
   libraries/HTTPClient/src/HTTPClient.cpp
+  libraries/HTTPUpdate/src/HTTPUpdate.cpp
+  libraries/LittleFS/src/LittleFS.cpp
+  libraries/I2S/src/I2S.cpp
   libraries/NetBIOS/src/NetBIOS.cpp
   libraries/Preferences/src/Preferences.cpp
+  libraries/RainMaker/src/RMaker.cpp
+  libraries/RainMaker/src/RMakerNode.cpp
+  libraries/RainMaker/src/RMakerParam.cpp
+  libraries/RainMaker/src/RMakerDevice.cpp
+  libraries/RainMaker/src/RMakerType.cpp
   libraries/SD_MMC/src/SD_MMC.cpp
   libraries/SD/src/SD.cpp
   libraries/SD/src/sd_diskio.cpp
@@ -54,12 +104,21 @@ set(LIBRARY_SRCS
   libraries/SPI/src/SPI.cpp
   libraries/Ticker/src/Ticker.cpp
   libraries/Update/src/Updater.cpp
+  libraries/Update/src/HttpsOTAUpdate.cpp
+  libraries/USB/src/USBHID.cpp
+  libraries/USB/src/USBHIDMouse.cpp
+  libraries/USB/src/USBHIDKeyboard.cpp
+  libraries/USB/src/USBHIDGamepad.cpp
+  libraries/USB/src/USBHIDConsumerControl.cpp
+  libraries/USB/src/USBHIDSystemControl.cpp
+  libraries/USB/src/USBHIDVendor.cpp
+  libraries/USB/src/USBVendor.cpp
   libraries/WebServer/src/WebServer.cpp
   libraries/WebServer/src/Parsing.cpp
   libraries/WebServer/src/detail/mimetable.cpp
   libraries/WiFiClientSecure/src/ssl_client.cpp
+  libraries/WiFiClientSecure/src/esp_crt_bundle.c
   libraries/WiFiClientSecure/src/WiFiClientSecure.cpp
-  libraries/WiFi/src/ETH.cpp
   libraries/WiFi/src/WiFiAP.cpp
   libraries/WiFi/src/WiFiClient.cpp
   libraries/WiFi/src/WiFi.cpp
@@ -69,69 +128,10 @@ set(LIBRARY_SRCS
   libraries/WiFi/src/WiFiServer.cpp
   libraries/WiFi/src/WiFiSTA.cpp
   libraries/WiFi/src/WiFiUdp.cpp
+  libraries/WiFiProv/src/WiFiProv.cpp
   libraries/Wire/src/Wire.cpp
   )
 
-set(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
@@ -145,6 +145,8 @@ set(BLE_SRCS
   libraries/BLE/src/BLEDescriptor.cpp
   libraries/BLE/src/BLEDescriptorMap.cpp
   libraries/BLE/src/BLEDevice.cpp
+  libraries/BLE/src/BLEEddystoneTLM.cpp
+  libraries/BLE/src/BLEEddystoneURL.cpp
   libraries/BLE/src/BLEExceptions.cpp
   libraries/BLE/src/BLEHIDDevice.cpp
   libraries/BLE/src/BLERemoteCharacteristic.cpp
@@ -162,23 +164,27 @@ set(BLE_SRCS
   libraries/BLE/src/GeneralUtils.cpp
   )
 
-set(COMPONENT_SRCS ${CORE_SRCS} ${LIBRARY_SRCS} ${AZURE_SRCS} ${BLE_SRCS})
-
-set(COMPONENT_ADD_INCLUDEDIRS
-  variants/esp32/
+set(includedirs
+  variants/${IDF_TARGET}/
   cores/esp32/
   libraries/ArduinoOTA/src
   libraries/AsyncUDP/src
-  libraries/AzureIoT/src
   libraries/BLE/src
   libraries/BluetoothSerial/src
   libraries/DNSServer/src
+  libraries/EEPROM/src
   libraries/ESP32/src
   libraries/ESPmDNS/src
+  libraries/Ethernet/src
+  libraries/FFat/src
   libraries/FS/src
   libraries/HTTPClient/src
+  libraries/HTTPUpdate/src
+  libraries/LittleFS/src
+  libraries/I2S/src
   libraries/NetBIOS/src
   libraries/Preferences/src
+  libraries/RainMaker/src
   libraries/SD_MMC/src
   libraries/SD/src
   libraries/SimpleBLE/src
@@ -186,15 +192,63 @@ set(COMPONENT_ADD_INCLUDEDIRS
   libraries/SPI/src
   libraries/Ticker/src
   libraries/Update/src
+  libraries/USB/src
   libraries/WebServer/src
   libraries/WiFiClientSecure/src
   libraries/WiFi/src
+  libraries/WiFiProv/src
   libraries/Wire/src
   )
 
-set(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 wifi_provisioning nghttp wpa_supplicant)
+set(priv_requires fatfs nvs_flash app_update spiffs bootloader_support openssl bt esp_ipc esp_hid)
 
-set(COMPONENT_REQUIRES spi_flash mbedtls mdns ethernet)
-set(COMPONENT_PRIV_REQUIRES fatfs nvs_flash app_update spiffs bootloader_support openssl)
+idf_component_register(INCLUDE_DIRS ${includedirs} PRIV_INCLUDE_DIRS ${priv_includes} SRCS ${srcs} REQUIRES ${requires} PRIV_REQUIRES ${priv_requires})
 
-register_component()
+string(TOUPPER ${CONFIG_IDF_TARGET} idf_target_caps)
+target_compile_options(${COMPONENT_TARGET} PUBLIC
+    -DARDUINO=10812
+    -DARDUINO_${idf_target_caps}_DEV
+    -DARDUINO_ARCH_ESP32
+    -DARDUINO_BOARD="${idf_target_caps}_DEV"
+    -DARDUINO_VARIANT="${CONFIG_IDF_TARGET}"
+    -DESP32)
+
+if(CONFIG_AUTOSTART_ARDUINO)
+    # in autostart mode, arduino-esp32 contains app_main() function and needs to
+    # reference setup() and loop() in the main component. If we add main
+    # component to priv_requires then we create a large circular dependency
+    # (arduino-esp32 -> main -> arduino-esp32) and can get linker errors, so
+    # instead we add setup() and loop() to the undefined symbols list so the
+    # linker will always include them.
+    #
+    # (As they are C++ symbol, we need to add the C++ mangled names.)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u _Z5setupv -u _Z4loopv")
+endif()
+
+# This function adds a dependency on the given component if the component is included into the build.
+function(maybe_add_component component_name)
+    idf_build_get_property(components BUILD_COMPONENTS)
+    if (${component_name} IN_LIST components)
+        idf_component_get_property(lib_name ${component_name} COMPONENT_LIB)
+        target_link_libraries(${COMPONENT_LIB} PUBLIC ${lib_name})
+    endif()
+endfunction()
+
+maybe_add_component(esp-dsp)
+
+if(CONFIG_ESP_RMAKER_WORK_QUEUE_TASK_STACK)
+    maybe_add_component(esp_rainmaker)
+    maybe_add_component(qrcode)
+endif()
+if(IDF_TARGET MATCHES "esp32s2|esp32s3" AND CONFIG_TINYUSB_ENABLED)
+    maybe_add_component(arduino_tinyusb)
+endif()
+if(NOT CONFIG_ARDUINO_SELECTIVE_COMPILATION OR CONFIG_ARDUINO_SELECTIVE_ArduinoOTA)
+    maybe_add_component(esp_https_ota)
+endif()
+if(NOT CONFIG_ARDUINO_SELECTIVE_COMPILATION OR CONFIG_ARDUINO_SELECTIVE_LITTLEFS)
+    maybe_add_component(esp_littlefs)
+endif()

CONTRIBUTING.rst

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

Kconfig.projbuild

@@ -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 +19,91 @@ 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
+
+config ARDUINO_LOOP_STACK_SIZE
+    int "Loop thread stack size"
+    default 8192
+    help
+        Amount of stack available for the Arduino task.
+
+choice ARDUINO_EVENT_RUNNING_CORE
+    bool "Core on which Arduino's event handler is running"
+    default ARDUINO_EVENT_RUN_CORE1
+    help
+        Select on which core Arduino's WiFi.onEvent() run
+
+    config ARDUINO_EVENT_RUN_CORE0
+        bool "CORE 0"
+    config ARDUINO_EVENT_RUN_CORE1
+        bool "CORE 1"
+    config ARDUINO_EVENT_RUN_NO_AFFINITY
+        bool "BOTH"
+
+endchoice
+
+config ARDUINO_EVENT_RUNNING_CORE
+    int
+    default 0 if ARDUINO_EVENT_RUN_CORE0
+    default 1 if ARDUINO_EVENT_RUN_CORE1
+    default -1 if ARDUINO_EVENT_RUN_NO_AFFINITY
+
+choice ARDUINO_UDP_RUNNING_CORE
+    bool "Core on which Arduino's UDP is running"
+    default ARDUINO_UDP_RUN_CORE1
+    help
+        Select on which core Arduino's UDP run
+
+    config ARDUINO_UDP_RUN_CORE0
+        bool "CORE 0"
+    config ARDUINO_UDP_RUN_CORE1
+        bool "CORE 1"
+    config ARDUINO_UDP_RUN_NO_AFFINITY
+        bool "BOTH"
+
+endchoice
+
+config ARDUINO_UDP_TASK_PRIORITY
+    int "Priority of the UDP task"
+    default 3
+    help
+        Select at what priority you want the UDP task to run.
+
+config ARDUINO_UDP_RUNNING_CORE
+    int
+    default 0 if ARDUINO_UDP_RUN_CORE0
+    default 1 if ARDUINO_UDP_RUN_CORE1
+    default -1 if ARDUINO_UDP_RUN_NO_AFFINITY
+
+config ARDUINO_ISR_IRAM
+    bool "Run interrupts in IRAM"
+    default "n"
+    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"
@@ -90,6 +175,8 @@ config ARDUHAL_PARTITION_SCHEME_MINIMAL
     bool "Minimal (for 2MB FLASH)"
 config ARDUHAL_PARTITION_SCHEME_NO_OTA
     bool "No OTA (for large apps)"
+config ARDUHAL_PARTITION_SCHEME_HUGE_APP
+    bool "Huge App (for very large apps)"
 config ARDUHAL_PARTITION_SCHEME_MIN_SPIFFS
     bool "Minimal SPIFFS (for large apps with OTA)"
 endchoice
@@ -99,6 +186,7 @@ config ARDUHAL_PARTITION_SCHEME
     default "default" if ARDUHAL_PARTITION_SCHEME_DEFAULT
     default "minimal" if ARDUHAL_PARTITION_SCHEME_MINIMAL
     default "no_ota" if ARDUHAL_PARTITION_SCHEME_NO_OTA
+    default "huge_app" if ARDUHAL_PARTITION_SCHEME_HUGE_APP
     default "min_spiffs" if ARDUHAL_PARTITION_SCHEME_MIN_SPIFFS
 
 
@@ -165,6 +253,12 @@ 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
@@ -177,6 +271,12 @@ config ARDUINO_SELECTIVE_HTTPClient
     select ARDUINO_SELECTIVE_WiFiClientSecure
     default y
 
+config ARDUINO_SELECTIVE_LITTLEFS
+    bool "Enable LITTLEFS"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_FS
+    default y
+
 config ARDUINO_SELECTIVE_NetBIOS
     bool "Enable NetBIOS"
     depends on ARDUINO_SELECTIVE_COMPILATION
@@ -243,6 +343,12 @@ config ARDUINO_SELECTIVE_WiFiClientSecure
     select ARDUINO_SELECTIVE_WiFi
     default y
 
+config ARDUINO_SELECTIVE_WiFiProv
+    bool "Enable WiFiProv"
+    depends on ARDUINO_SELECTIVE_COMPILATION
+    select ARDUINO_SELECTIVE_WiFi
+    default y
+
 config ARDUINO_SELECTIVE_Wire
     bool "Enable Wire"
     depends on ARDUINO_SELECTIVE_COMPILATION

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
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+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
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+they have is not the original version, so that the original author's
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+
+Finally, software patents pose a constant threat to the existence of
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+Most GNU software, including some libraries, is covered by the
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+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License. We use
+this license for certain libraries in order to permit linking those
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+
+When a program is linked with a library, whether statically or using a
+shared library, the combination of the two is legally speaking a
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+entire combination fits its criteria of freedom. The Lesser General
+Public License permits more lax criteria for linking other code with
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+
+We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
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+
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+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
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+is safest to attach them to the start of each source file to most
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+
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+    Copyright (C) year  name of author
+
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+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+
+    signature of Ty Coon, 1 April 1990
+    Ty Coon, President of Vice
+
+That's all there is to it!

Makefile.projbuild

@@ -1,17 +0,0 @@
-BOOT_APP_BIN_OFFSET := 0xe000
-BOOT_APP_BIN_ROOT := $(call dequote,$(COMPONENT_PATH))
-BOOT_APP_BIN_PATH := $(call dequote,$(abspath $(BOOT_APP_BIN_ROOT)/$(subst $(quote),,tools/partitions/boot_app0.bin)))
-
-ifndef CONFIG_PARTITION_TABLE_CUSTOM
-PARTITION_TABLE_CSV_PATH = $(call dequote,$(abspath $(BOOT_APP_BIN_ROOT)/$(subst $(quote),,tools/partitions/$(CONFIG_ARDUHAL_PARTITION_SCHEME).csv)))
-endif
-
-BOOT_APP_BIN_FLASH_CMD = $(ESPTOOLPY_SERIAL) write_flash $(BOOT_APP_BIN_OFFSET) $(BOOT_APP_BIN_PATH)
-ESPTOOL_ALL_FLASH_ARGS += $(BOOT_APP_BIN_OFFSET) $(BOOT_APP_BIN_PATH)
-
-CPPFLAGS += -DARDUINO=10800 -DESP32=1 -DARDUINO_ARCH_ESP32=1 -DBOARD_HAS_PSRAM
-
-boot-app0:
-	@echo "Rebooting to APP0"
-	$(BOOT_APP_BIN_FLASH_CMD)
-

README.md

@@ -1,53 +1,58 @@
-# Arduino core for ESP32 WiFi chip
+# Arduino core for the ESP32, ESP32-S2, ESP32-S3 and ESP32-C3
 
-[![Build Status](https://travis-ci.org/espressif/arduino-esp32.svg?branch=master)](https://travis-ci.org/espressif/arduino-esp32)
+![Build Status](https://github.com/espressif/arduino-esp32/workflows/ESP32%20Arduino%20CI/badge.svg) [![Documentation Status](https://readthedocs.com/projects/espressif-arduino-esp32/badge/?version=latest)](https://docs.espressif.com/projects/arduino-esp32/en/latest/?badge=latest)
 
-### Need help or have a question? Join the chat at [![https://gitter.im/espressif/arduino-esp32](https://badges.gitter.im/espressif/arduino-esp32.svg)](https://gitter.im/espressif/arduino-esp32?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+### 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) or [open a new Discussion](https://github.com/espressif/arduino-esp32/discussions)
 
 ## Contents
-- [Development Status](#development-status)
-- [Installation Instructions](#installation-instructions)
-- [Decoding Exceptions](#decoding-exceptions)
-- [Issue/Bug report template](#issuebug-report-template)
-- [ESP32Dev Board PINMAP](#esp32dev-board-pinmap)
 
-## Development Status
-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:
-- 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
+  - [Development Status](#development-status)
+  - [Development Planning](#development-planning)
+  - [Documentation](#documentation)
+  - [Supported Chips](#supported-chips)
+  - [Decoding exceptions](#decoding-exceptions)
+  - [Issue/Bug report template](#issuebug-report-template)
+  - [Contributing](#contributing)
 
-## Installation Instructions
+### Development Status
 
-#### [Latest release ![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32/all.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/)
+Latest Stable Release  [![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Release Date](https://img.shields.io/github/release-date/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/) [![Downloads](https://img.shields.io/github/downloads/espressif/arduino-esp32/latest/total.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/latest/)
 
-- Using Arduino IDE Boards Manager (preferred)
-  + [Instructions for Boards Manager](docs/arduino-ide/boards_manager.md)
-- Using Arduino IDE with the development repository
-  + [Instructions for Windows](docs/arduino-ide/windows.md)
-  + [Instructions for Mac](docs/arduino-ide/mac.md)
-  + [Instructions for Debian/Ubuntu Linux](docs/arduino-ide/debian_ubuntu.md)
-  + [Instructions for Fedora](docs/arduino-ide/fedora.md)
-  + [Instructions for openSUSE](docs/arduino-ide/opensuse.md)
-- [Using PlatformIO](docs/platformio.md)
-- [Building with make](docs/make.md)
-- [Using as ESP-IDF component](docs/esp-idf_component.md)
-- [Using OTAWebUpdater](docs/OTAWebUpdate/OTAWebUpdate.md)
+Latest Development Release  [![Release Version](https://img.shields.io/github/release/espressif/arduino-esp32/all.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/) [![Release Date](https://img.shields.io/github/release-date-pre/espressif/arduino-esp32.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/) [![Downloads](https://img.shields.io/github/downloads-pre/espressif/arduino-esp32/latest/total.svg?style=plastic)](https://github.com/espressif/arduino-esp32/releases/)
 
-#### Decoding exceptions
+### Development Planning
+
+Our Development is fully tracked on this public **[Roadmap 🎉](https://github.com/orgs/espressif/projects/3)** 
+
+For even more information you can take a look at [Sprint Meeting notes](https://github.com/espressif/arduino-esp32/discussions/categories/sprints-meeting-notes) or join [Monthly Community Meetings 🔔](https://github.com/espressif/arduino-esp32/discussions/categories/monthly-community-meetings)
+
+### Documentation
+
+You can use the [Arduino-ESP32 Online Documentation](https://docs.espressif.com/projects/arduino-esp32/en/latest/) to get all information about this project.
+
+* [Getting Started](https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html)
+* [Installing (Windows, Linux and macOS)](https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html)
+* [Libraries](https://docs.espressif.com/projects/arduino-esp32/en/latest/libraries.html)
+* [ESP-IDF as Component](https://docs.espressif.com/projects/arduino-esp32/en/latest/esp-idf_component.html)
+* [FAQ](https://docs.espressif.com/projects/arduino-esp32/en/latest/faq.html)
+* [Troubleshooting](https://docs.espressif.com/projects/arduino-esp32/en/latest/troubleshooting.html)
+
+### Supported Chips
+
+Visit the [supported chips](https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html#supported-soc-s) documentation to see the list of current supported ESP32 SoCs.
+
+### Decoding exceptions
 
 You can use [EspExceptionDecoder](https://github.com/me-no-dev/EspExceptionDecoder) to get meaningful call trace.
 
-#### Issue/Bug report template
-Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as [for reference](https://github.com/espressif/arduino-esp32/issues?utf8=%E2%9C%93&q=is%3Aissue%20label%3A%22for%20reference%22%20).
+### Issue/Bug report template
 
-Finally, if you're sure no one else had the issue, follow the [ISSUE_TEMPLATE](docs/ISSUE_TEMPLATE.md) while reporting any issue.
+Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as [Type: For reference](https://github.com/espressif/arduino-esp32/issues?q=is%3Aissue+label%3A%22Type%3A+For+reference%22+).
 
+Finally, if you are sure no one else had the issue, follow the **Issue template** or **Feature request template** while reporting any [new Issue](https://github.com/espressif/arduino-esp32/issues/new/choose).
 
-## ESP32Dev Board PINMAP
+### Contributing
 
-![Pin Functions](docs/esp32_pinmap.png)
+We welcome contributions to the Arduino ESP32 project!
 
-## Hint
-
-Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process
+See [contributing](https://docs.espressif.com/projects/arduino-esp32/en/latest/contributing.html) in the documentation for more information on how to contribute to the project.

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

component.mk

@@ -1,8 +0,0 @@
-ARDUINO_LIBRARIES_LIST := $(patsubst $(COMPONENT_PATH)/libraries/%,%,$(wildcard $(COMPONENT_PATH)/libraries/*))
-ARDUINO_SINGLE_LIBRARY_FILES = $(patsubst $(COMPONENT_PATH)/%,%,$(sort $(dir $(wildcard $(COMPONENT_PATH)/libraries/$(MODULE)/*/)) $(dir $(wildcard $(COMPONENT_PATH)/libraries/$(MODULE)/*/*/)) $(dir $(wildcard $(COMPONENT_PATH)/libraries/$(MODULE)/*/*/*/)) $(dir $(wildcard $(COMPONENT_PATH)/libraries/$(MODULE)/*/*/*/*/)) $(dir $(wildcard $(COMPONENT_PATH)/libraries/$(MODULE)/*/*/*/*/*/))))
-ARDUINO_CORE_LIBS := $(foreach MODULE,$(ARDUINO_LIBRARIES_LIST),$(if $(CONFIG_ARDUINO_SELECTIVE_COMPILATION),$(if $(CONFIG_ARDUINO_SELECTIVE_$(MODULE)),$(ARDUINO_SINGLE_LIBRARY_FILES)),$(ARDUINO_SINGLE_LIBRARY_FILES)))
-
-COMPONENT_ADD_INCLUDEDIRS := cores/esp32 variants/esp32 $(ARDUINO_CORE_LIBS)
-COMPONENT_PRIV_INCLUDEDIRS := cores/esp32/libb64
-COMPONENT_SRCDIRS := cores/esp32/libb64 cores/esp32 variants/esp32 $(ARDUINO_CORE_LIBS)
-CXXFLAGS += -fno-rtti

cores/esp32/Arduino.h

@@ -29,6 +29,7 @@
 #include <string.h>
 #include <inttypes.h>
 
+#include "esp_arduino_version.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/semphr.h"
@@ -68,14 +69,7 @@
 #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 round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
 #define radians(deg) ((deg)*DEG_TO_RAD)
 #define degrees(rad) ((rad)*RAD_TO_DEG)
 #define sq(x) ((x)*(x))
@@ -85,7 +79,7 @@
 #define interrupts() sei()
 #define noInterrupts() cli()
 
-#define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
+#define clockCyclesPerMicrosecond() ( (long int)getCpuFrequencyMhz() )
 #define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
 #define microsecondsToClockCycles(a) ( (a) * clockCyclesPerMicrosecond() )
 
@@ -95,7 +89,7 @@
 #define bitRead(value, bit) (((value) >> (bit)) & 0x01)
 #define bitSet(value, bit) ((value) |= (1UL << (bit)))
 #define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
-#define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit))
+#define bitWrite(value, bit, bitvalue) ((bitvalue) ? bitSet(value, bit) : bitClear(value, bit))
 
 // avr-libc defines _NOP() since 1.6.2
 #ifndef _NOP
@@ -105,13 +99,23 @@
 #define bit(b) (1UL << (b))
 #define _BV(b) (1UL << (b))
 
-#define digitalPinToPort(pin)       (((pin)>31)?1:0)
-#define digitalPinToBitMask(pin)    (1UL << (((pin)>31)?((pin)-32):(pin)))
 #define digitalPinToTimer(pin)      (0)
 #define analogInPinToBit(P)         (P)
+#if SOC_GPIO_PIN_COUNT <= 32
+#define digitalPinToPort(pin)       (0)
+#define digitalPinToBitMask(pin)    (1UL << (pin))
+#define portOutputRegister(port)    ((volatile uint32_t*)GPIO_OUT_REG)
+#define portInputRegister(port)     ((volatile uint32_t*)GPIO_IN_REG)
+#define portModeRegister(port)      ((volatile uint32_t*)GPIO_ENABLE_REG)
+#elif SOC_GPIO_PIN_COUNT <= 64
+#define digitalPinToPort(pin)       (((pin)>31)?1:0)
+#define digitalPinToBitMask(pin)    (1UL << (((pin)>31)?((pin)-32):(pin)))
 #define portOutputRegister(port)    ((volatile uint32_t*)((port)?GPIO_OUT1_REG:GPIO_OUT_REG))
 #define portInputRegister(port)     ((volatile uint32_t*)((port)?GPIO_IN1_REG:GPIO_IN_REG))
 #define portModeRegister(port)      ((volatile uint32_t*)((port)?GPIO_ENABLE1_REG:GPIO_ENABLE_REG))
+#else
+#error SOC_GPIO_PIN_COUNT > 64 not implemented
+#endif
 
 #define NOT_A_PIN -1
 #define NOT_A_PORT -1
@@ -122,10 +126,12 @@ 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);
 
@@ -146,6 +152,9 @@ void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
 #ifdef __cplusplus
 }
 
+#include <algorithm>
+#include <cmath>
+
 #include "WCharacter.h"
 #include "WString.h"
 #include "Stream.h"
@@ -157,12 +166,26 @@ void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
 #include "Udp.h"
 #include "HardwareSerial.h"
 #include "Esp.h"
+#include "esp32/spiram.h"
+
+using std::abs;
+using std::isinf;
+using std::isnan;
+using std::max;
+using std::min;
+using ::round;
 
 uint16_t makeWord(uint16_t w);
-uint16_t makeWord(byte h, byte l);
+uint16_t makeWord(uint8_t h, uint8_t l);
 
 #define word(...) makeWord(__VA_ARGS__)
 
+size_t getArduinoLoopTaskStackSize(void);
+#define SET_LOOP_TASK_STACK_SIZE(sz) size_t getArduinoLoopTaskStackSize() { return sz;}
+
+// allows user to bypass esp_spiram_test()
+#define BYPASS_SPIRAM_TEST(bypass) bool testSPIRAM(void) { if (bypass) return true; else return esp_spiram_test(); }
+
 unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
 unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
 
@@ -172,16 +195,14 @@ extern "C" void configTime(long gmtOffset_sec, int daylightOffset_sec,
 extern "C" void configTzTime(const char* tz,
         const char* server1, const char* server2 = nullptr, const char* server3 = nullptr);
 
+void setToneChannel(uint8_t channel = 0);
+void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
+void noTone(uint8_t _pin);
+
 // WMath prototypes
 long random(long);
 #endif /* __cplusplus */
 
-#ifndef _GLIBCXX_VECTOR
-// arduino is not compatible with std::vector
-#define min(a,b) ((a)<(b)?(a):(b))
-#define max(a,b) ((a)>(b)?(a):(b))
-#endif
-
 #define _min(a,b) ((a)<(b)?(a):(b))
 #define _max(a,b) ((a)>(b)?(a):(b))
 

cores/esp32/Esp.cpp

@@ -19,26 +19,41 @@
 
 #include "Arduino.h"
 #include "Esp.h"
-#include "rom/spi_flash.h"
 #include "esp_sleep.h"
 #include "esp_spi_flash.h"
 #include <memory>
 #include <soc/soc.h>
-#include <soc/efuse_reg.h>
+#include <esp_partition.h>
+extern "C" {
+#include "esp_ota_ops.h"
+#include "esp_image_format.h"
+}
+#include <MD5Builder.h>
 
-/* Main header of binary image */
-typedef struct {
-    uint8_t magic;
-    uint8_t segment_count;
-    uint8_t spi_mode;      /* flash read mode (esp_image_spi_mode_t as uint8_t) */
-    uint8_t spi_speed: 4;  /* flash frequency (esp_image_spi_freq_t as uint8_t) */
-    uint8_t spi_size: 4;   /* flash chip size (esp_image_flash_size_t as uint8_t) */
-    uint32_t entry_addr;
-    uint8_t encrypt_flag;    /* encrypt flag */
-    uint8_t extra_header[15]; /* ESP32 additional header, unused by second bootloader */
-} esp_image_header_t;
-
-#define ESP_IMAGE_HEADER_MAGIC 0xE9
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/spi_flash.h"
+#include "soc/efuse_reg.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000     // Flash offset containing flash size and spi mode
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#include "soc/efuse_reg.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/rom/spi_flash.h"
+#include "soc/efuse_reg.h"
+#define ESP_FLASH_IMAGE_BASE 0x0000     // Esp32s3 is located at 0x0000
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/spi_flash.h"
+#define ESP_FLASH_IMAGE_BASE 0x0000     // Esp32c3 is located at 0x0000
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/spi_flash.h"
+#define ESP_FLASH_IMAGE_BASE 0x1000
+#endif
 
 /**
  * User-defined Literals
@@ -100,21 +115,135 @@ 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();
 }
 
+uint32_t EspClass::getHeapSize(void)
+{
+    multi_heap_info_t info;
+    heap_caps_get_info(&info, MALLOC_CAP_INTERNAL);
+    return info.total_free_bytes + info.total_allocated_bytes;
+}
+
 uint32_t EspClass::getFreeHeap(void)
 {
-    return esp_get_free_heap_size();
+    return heap_caps_get_free_size(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getMinFreeHeap(void)
+{
+    return heap_caps_get_minimum_free_size(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getMaxAllocHeap(void)
+{
+    return heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getPsramSize(void)
+{
+	if(psramFound()){
+	    multi_heap_info_t info;
+	    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+	    return info.total_free_bytes + info.total_allocated_bytes;
+	}
+	return 0;
+}
+
+uint32_t EspClass::getFreePsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+uint32_t EspClass::getMinFreePsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_minimum_free_size(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+uint32_t EspClass::getMaxAllocPsram(void)
+{
+	if(psramFound()){
+	    return heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM);
+	}
+	return 0;
+}
+
+static uint32_t sketchSize(sketchSize_t response) {
+    esp_image_metadata_t data;
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    if (!running) return 0;
+    const esp_partition_pos_t running_pos  = {
+        .offset = running->address,
+        .size = running->size,
+    };
+    data.start_addr = running_pos.offset;
+    esp_image_verify(ESP_IMAGE_VERIFY, &running_pos, &data);
+    if (response) {
+        return running_pos.size - data.image_len;
+    } else {
+        return data.image_len;
+    }
+}
+    
+uint32_t EspClass::getSketchSize () {
+    return sketchSize(SKETCH_SIZE_TOTAL);
+}
+
+String EspClass::getSketchMD5()
+{
+    static String result;
+    if (result.length()) {
+        return result;
+    }
+    uint32_t lengthLeft = getSketchSize();
+
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    if (!running) {
+        log_e("Partition could not be found");
+
+        return String();
+    }
+    const size_t bufSize = SPI_FLASH_SEC_SIZE;
+    std::unique_ptr<uint8_t[]> buf(new uint8_t[bufSize]);
+    uint32_t offset = 0;
+    if(!buf.get()) {
+        log_e("Not enough memory to allocate buffer");
+
+        return String();
+    }
+    MD5Builder md5;
+    md5.begin();
+    while( lengthLeft > 0) {
+        size_t readBytes = (lengthLeft < bufSize) ? lengthLeft : bufSize;
+        if (!ESP.flashRead(running->address + offset, reinterpret_cast<uint32_t*>(buf.get()), (readBytes + 3) & ~3)) {
+            log_e("Could not read buffer from flash");
+
+            return String();
+        }
+        md5.add(buf.get(), readBytes);
+        lengthLeft -= readBytes;
+        offset += readBytes;
+    }
+    md5.calculate();
+    result = md5.toString();
+    return result;
+}
+
+uint32_t EspClass::getFreeSketchSpace () {
+    const esp_partition_t* _partition = esp_ota_get_next_update_partition(NULL);
+    if(!_partition){
+        return 0;
+    }
+
+    return _partition->size;
 }
 
 uint8_t EspClass::getChipRevision(void)
@@ -124,6 +253,53 @@ uint8_t EspClass::getChipRevision(void)
     return chip_info.revision;
 }
 
+const char * EspClass::getChipModel(void)
+{
+#if CONFIG_IDF_TARGET_ESP32
+    uint32_t chip_ver = REG_GET_FIELD(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_VER_PKG);
+    uint32_t pkg_ver = chip_ver & 0x7;
+    switch (pkg_ver) {
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D0WDQ6 :
+            return "ESP32-D0WDQ6";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D0WDQ5 :
+            return "ESP32-D0WDQ5";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 :
+            return "ESP32-D2WDQ5";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2 :
+            return "ESP32-PICO-D2";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4 :
+            return "ESP32-PICO-D4";
+        case EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302 :
+            return "ESP32-PICO-V3-02";
+        default:
+            return "Unknown";
+    }
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t pkg_ver = REG_GET_FIELD(EFUSE_RD_MAC_SPI_SYS_3_REG, EFUSE_PKG_VERSION);
+    switch (pkg_ver) {
+    case 0:
+      return "ESP32-S2";
+    case 1:
+      return "ESP32-S2FH16";
+    case 2:
+      return "ESP32-S2FH32";
+    default:
+      return "ESP32-S2 (Unknown)";
+    }
+#elif CONFIG_IDF_TARGET_ESP32S3
+    return "ESP32-S3";
+#elif CONFIG_IDF_TARGET_ESP32C3
+    return "ESP32-C3";
+#endif
+}
+
+uint8_t EspClass::getChipCores(void)
+{
+    esp_chip_info_t chip_info;
+    esp_chip_info(&chip_info);
+    return chip_info.cores;
+}
+
 const char * EspClass::getSdkVersion(void)
 {
     return esp_get_idf_version();
@@ -132,7 +308,7 @@ const char * EspClass::getSdkVersion(void)
 uint32_t EspClass::getFlashChipSize(void)
 {
     esp_image_header_t fhdr;
-    if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
         return 0;
     }
     return magicFlashChipSize(fhdr.spi_size);
@@ -141,7 +317,7 @@ uint32_t EspClass::getFlashChipSize(void)
 uint32_t EspClass::getFlashChipSpeed(void)
 {
     esp_image_header_t fhdr;
-    if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
         return 0;
     }
     return magicFlashChipSpeed(fhdr.spi_speed);
@@ -150,7 +326,7 @@ uint32_t EspClass::getFlashChipSpeed(void)
 FlashMode_t EspClass::getFlashChipMode(void)
 {
     esp_image_header_t fhdr;
-    if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
+    if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
         return FM_UNKNOWN;
     }
     return magicFlashChipMode(fhdr.spi_mode);
@@ -215,6 +391,20 @@ bool EspClass::flashRead(uint32_t offset, uint32_t *data, size_t size)
     return spi_flash_read(offset, (uint32_t*) data, size) == ESP_OK;
 }
 
+bool EspClass::partitionEraseRange(const esp_partition_t *partition, uint32_t offset, size_t size) 
+{
+    return esp_partition_erase_range(partition, offset, size) == ESP_OK;
+}
+
+bool EspClass::partitionWrite(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size) 
+{
+    return esp_partition_write(partition, offset, data, size) == ESP_OK;
+}
+
+bool EspClass::partitionRead(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size) 
+{
+    return esp_partition_read(partition, offset, data, size) == ESP_OK;
+}
 
 uint64_t EspClass::getEfuseMac(void)
 {

cores/esp32/Esp.h

@@ -21,6 +21,8 @@
 #define ESP_H
 
 #include <Arduino.h>
+#include <esp_partition.h>
+#include <hal/cpu_hal.h>
 
 /**
  * AVR macros for WDT managment
@@ -50,16 +52,35 @@ typedef enum {
     FM_UNKNOWN = 0xff
 } FlashMode_t;
 
+typedef enum {
+    SKETCH_SIZE_TOTAL = 0,
+    SKETCH_SIZE_FREE = 1
+} sketchSize_t;
+
 class EspClass
 {
 public:
     EspClass() {}
     ~EspClass() {}
     void restart();
-    uint32_t getFreeHeap();
+
+    //Internal RAM
+    uint32_t getHeapSize(); //total heap size
+    uint32_t getFreeHeap(); //available heap
+    uint32_t getMinFreeHeap(); //lowest level of free heap since boot
+    uint32_t getMaxAllocHeap(); //largest block of heap that can be allocated at once
+
+    //SPI RAM
+    uint32_t getPsramSize();
+    uint32_t getFreePsram();
+    uint32_t getMinFreePsram();
+    uint32_t getMaxAllocPsram();
+
     uint8_t getChipRevision();
-    uint8_t getCpuFreqMHz(){ return CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ; }
-    uint32_t getCycleCount();
+    const char * getChipModel();
+    uint8_t getChipCores();
+    uint32_t getCpuFreqMHz(){ return getCpuFrequencyMhz(); }
+    inline uint32_t getCycleCount() __attribute__((always_inline));
     const char * getSdkVersion();
 
     void deepSleep(uint32_t time_us);
@@ -72,14 +93,27 @@ public:
     uint32_t magicFlashChipSpeed(uint8_t byte);
     FlashMode_t magicFlashChipMode(uint8_t byte);
 
+    uint32_t getSketchSize();
+    String getSketchMD5();
+    uint32_t getFreeSketchSpace();
+
     bool flashEraseSector(uint32_t sector);
     bool flashWrite(uint32_t offset, uint32_t *data, size_t size);
     bool flashRead(uint32_t offset, uint32_t *data, size_t size);
 
+    bool partitionEraseRange(const esp_partition_t *partition, uint32_t offset, size_t size);
+    bool partitionWrite(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size);
+    bool partitionRead(const esp_partition_t *partition, uint32_t offset, uint32_t *data, size_t size);
+
     uint64_t getEfuseMac();
 
 };
 
+uint32_t ARDUINO_ISR_ATTR EspClass::getCycleCount()
+{
+    return cpu_hal_get_cycle_count();
+}
+
 extern EspClass ESP;
 
 #endif //ESP_H

cores/esp32/FirmwareMSC.cpp

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

cores/esp32/FirmwareMSC.h

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

cores/esp32/FunctionalInterrupt.cpp

@@ -0,0 +1,44 @@
+/*
+ * FunctionalInterrupt.cpp
+ *
+ *  Created on: 8 jul. 2018
+ *      Author: Herman
+ */
+
+#include "FunctionalInterrupt.h"
+#include "Arduino.h"
+
+typedef void (*voidFuncPtr)(void);
+typedef void (*voidFuncPtrArg)(void*);
+
+extern "C"
+{
+	extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc, void * arg, int intr_type, bool functional);
+}
+
+void ARDUINO_ISR_ATTR interruptFunctional(void* arg)
+{
+    InterruptArgStructure* localArg = (InterruptArgStructure*)arg;
+	if (localArg->interruptFunction)
+	{
+	  localArg->interruptFunction();
+	}
+}
+
+void attachInterrupt(uint8_t pin, std::function<void(void)> intRoutine, int mode)
+{
+	// use the local interrupt routine which takes the ArgStructure as argument
+	__attachInterruptFunctionalArg (pin, (voidFuncPtrArg)interruptFunctional, new InterruptArgStructure{intRoutine}, mode, true);
+}
+
+extern "C"
+{
+   void cleanupFunctional(void* arg)
+   {
+	 delete (InterruptArgStructure*)arg;
+   }
+}
+
+
+
+

cores/esp32/FunctionalInterrupt.h

@@ -0,0 +1,20 @@
+/*
+ * FunctionalInterrupt.h
+ *
+ *  Created on: 8 jul. 2018
+ *      Author: Herman
+ */
+
+#ifndef CORE_CORE_FUNCTIONALINTERRUPT_H_
+#define CORE_CORE_FUNCTIONALINTERRUPT_H_
+
+#include <functional>
+
+struct InterruptArgStructure {
+	std::function<void(void)> interruptFunction;
+};
+
+void attachInterrupt(uint8_t pin, std::function<void(void)> intRoutine, int mode);
+
+
+#endif /* CORE_CORE_FUNCTIONALINTERRUPT_H_ */

cores/esp32/HWCDC.cpp

@@ -0,0 +1,392 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "USB.h"
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+
+#include "esp32-hal.h"
+#include "HWCDC.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "freertos/queue.h"
+#include "freertos/ringbuf.h"
+#include "esp_intr_alloc.h"
+#include "soc/periph_defs.h"
+#include "hal/usb_serial_jtag_ll.h"
+
+ESP_EVENT_DEFINE_BASE(ARDUINO_HW_CDC_EVENTS);
+
+static RingbufHandle_t tx_ring_buf = NULL;
+static xQueueHandle rx_queue = NULL;
+static uint8_t rx_data_buf[64];
+static intr_handle_t intr_handle = NULL;
+static volatile bool initial_empty = false;
+static xSemaphoreHandle tx_lock = NULL;
+static uint32_t tx_timeout_ms = 200;
+static esp_event_loop_handle_t arduino_hw_cdc_event_loop_handle = NULL;
+
+static esp_err_t arduino_hw_cdc_event_post(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, BaseType_t *task_unblocked){
+    if(arduino_hw_cdc_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_isr_post_to(arduino_hw_cdc_event_loop_handle, event_base, event_id, event_data, event_data_size, task_unblocked);
+}
+
+static esp_err_t arduino_hw_cdc_event_handler_register_with(esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg){
+    if (!arduino_hw_cdc_event_loop_handle) {
+        esp_event_loop_args_t event_task_args = {
+            .queue_size = 5,
+            .task_name = "arduino_hw_cdc_events",
+            .task_priority = 5,
+            .task_stack_size = 2048,
+            .task_core_id = tskNO_AFFINITY
+        };
+        if (esp_event_loop_create(&event_task_args, &arduino_hw_cdc_event_loop_handle) != ESP_OK) {
+            log_e("esp_event_loop_create failed");
+        }
+    }
+    if(arduino_hw_cdc_event_loop_handle == NULL){
+        return ESP_FAIL;
+    }
+    return esp_event_handler_register_with(arduino_hw_cdc_event_loop_handle, event_base, event_id, event_handler, event_handler_arg);
+}
+
+static void hw_cdc_isr_handler(void *arg) {
+    portBASE_TYPE xTaskWoken = 0;
+    uint32_t usbjtag_intr_status = 0;
+    arduino_hw_cdc_event_data_t event = {0};
+    usbjtag_intr_status = usb_serial_jtag_ll_get_intsts_mask();
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY) {
+        // Interrupt tells us the host picked up the data we sent.
+        if (usb_serial_jtag_ll_txfifo_writable() == 1) {
+            // We disable the interrupt here so that the interrupt won't be triggered if there is no data to send.
+            usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+
+            if(!initial_empty){
+                initial_empty = true;
+                //send event?
+                //ets_printf("CONNECTED\n");
+                arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_CONNECTED_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+            }
+            size_t queued_size;
+            uint8_t *queued_buff = (uint8_t *)xRingbufferReceiveUpToFromISR(tx_ring_buf, &queued_size, 64);
+            // If the hardware fifo is avaliable, write in it. Otherwise, do nothing.
+            if (queued_buff != NULL) {  //Although tx_queued_bytes may be larger than 0. We may have interrupt before xRingbufferSend() was called.
+                //Copy the queued buffer into the TX FIFO
+                usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+                usb_serial_jtag_ll_write_txfifo(queued_buff, queued_size);
+                usb_serial_jtag_ll_txfifo_flush();
+                vRingbufferReturnItemFromISR(tx_ring_buf, queued_buff, &xTaskWoken);
+                usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+                //send event?
+                //ets_printf("TX:%u\n", queued_size);
+                event.tx.len = queued_size;
+                arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_TX_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+            }
+        } else {
+            usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        }
+    }
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT) {
+        // read rx buffer(max length is 64), and send avaliable data to ringbuffer.
+        // Ensure the rx buffer size is larger than RX_MAX_SIZE.
+        usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT);
+        uint32_t rx_fifo_len = usb_serial_jtag_ll_read_rxfifo(rx_data_buf, 64);
+        uint32_t i=0;
+        for(i=0; i<rx_fifo_len; i++){
+            if(rx_queue == NULL || !xQueueSendFromISR(rx_queue, rx_data_buf+i, &xTaskWoken)){
+                break;
+            }
+        }
+        //send event?
+        //ets_printf("RX:%u/%u\n", i, rx_fifo_len);
+        event.rx.len = i;
+        arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_RX_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+    }
+
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_BUS_RESET) {
+        usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_INTR_BUS_RESET);
+        initial_empty = false;
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        //ets_printf("BUS_RESET\n");
+        arduino_hw_cdc_event_post(ARDUINO_HW_CDC_EVENTS, ARDUINO_HW_CDC_BUS_RESET_EVENT, &event, sizeof(arduino_hw_cdc_event_data_t), &xTaskWoken);
+    }
+
+    if (xTaskWoken == pdTRUE) {
+        portYIELD_FROM_ISR();
+    }
+}
+
+static void ARDUINO_ISR_ATTR cdc0_write_char(char c) {
+    if(xPortInIsrContext()){
+        xRingbufferSendFromISR(tx_ring_buf, (void*) (&c), 1, NULL);
+    } else {
+        xRingbufferSend(tx_ring_buf, (void*) (&c), 1, tx_timeout_ms / portTICK_PERIOD_MS);
+    }
+    usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+}
+
+HWCDC::HWCDC() {
+
+}
+
+HWCDC::~HWCDC(){
+    end();
+}
+
+HWCDC::operator bool() const
+{
+    return initial_empty;
+}
+
+void HWCDC::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_HW_CDC_ANY_EVENT, callback);
+}
+
+void HWCDC::onEvent(arduino_hw_cdc_event_t event, esp_event_handler_t callback){
+    arduino_hw_cdc_event_handler_register_with(ARDUINO_HW_CDC_EVENTS, event, callback, this);
+}
+
+void HWCDC::begin(unsigned long baud)
+{
+    if(tx_lock == NULL) {
+        tx_lock = xSemaphoreCreateMutex();
+    }
+    setRxBufferSize(256);//default if not preset
+    setTxBufferSize(256);//default if not preset
+
+    usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+    usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+    usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
+    if(!intr_handle && esp_intr_alloc(ETS_USB_SERIAL_JTAG_INTR_SOURCE, 0, hw_cdc_isr_handler, NULL, &intr_handle) != ESP_OK){
+        isr_log_e("HW USB CDC failed to init interrupts");
+        end();
+        return;
+    }
+    usb_serial_jtag_ll_txfifo_flush();
+}
+
+void HWCDC::end()
+{
+    //Disable tx/rx interrupt.
+    usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+    esp_intr_free(intr_handle);
+    intr_handle = NULL;
+    if(tx_lock != NULL) {
+        vSemaphoreDelete(tx_lock);
+    }
+    setRxBufferSize(0);
+    setTxBufferSize(0);
+    if (arduino_hw_cdc_event_loop_handle) {
+        esp_event_loop_delete(arduino_hw_cdc_event_loop_handle);
+        arduino_hw_cdc_event_loop_handle = NULL;
+    }
+}
+
+void HWCDC::setTxTimeoutMs(uint32_t timeout){
+    tx_timeout_ms = timeout;
+}
+
+/*
+ * WRITING
+*/
+
+size_t HWCDC::setTxBufferSize(size_t tx_queue_len){
+    if(tx_ring_buf){
+        if(!tx_queue_len){
+            vRingbufferDelete(tx_ring_buf);
+            tx_ring_buf = NULL;
+        }
+        return 0;
+    }
+    tx_ring_buf = xRingbufferCreate(tx_queue_len, RINGBUF_TYPE_BYTEBUF);
+    if(!tx_ring_buf){
+        return 0;
+    }
+    return tx_queue_len;
+}
+
+int HWCDC::availableForWrite(void)
+{
+    if(tx_ring_buf == NULL || tx_lock == NULL){
+        return 0;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t a = xRingbufferGetCurFreeSize(tx_ring_buf);
+    xSemaphoreGive(tx_lock);
+    return a;
+}
+
+size_t HWCDC::write(const uint8_t *buffer, size_t size)
+{
+    if(buffer == NULL || size == 0 || tx_ring_buf == NULL || tx_lock == NULL){
+        return 0;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t max_size = xRingbufferGetMaxItemSize(tx_ring_buf);
+    size_t space = xRingbufferGetCurFreeSize(tx_ring_buf);
+    size_t to_send = size, so_far = 0;
+
+    if(space > size){
+        space = size;
+    }
+    // Non-Blocking method, Sending data to ringbuffer, and handle the data in ISR.
+    if(xRingbufferSend(tx_ring_buf, (void*) (buffer), space, 0) != pdTRUE){
+        size = 0;
+    } else {
+        to_send -= space;
+        so_far += space;
+        // Now trigger the ISR to read data from the ring buffer.
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+
+        while(to_send){
+            if(max_size > to_send){
+                max_size = to_send;
+            }
+            // Blocking method, Sending data to ringbuffer, and handle the data in ISR.
+            if(xRingbufferSend(tx_ring_buf, (void*) (buffer+so_far), max_size, tx_timeout_ms / portTICK_PERIOD_MS) != pdTRUE){
+                size = so_far;
+                break;
+            }
+            so_far += max_size;
+            to_send -= max_size;
+            // Now trigger the ISR to read data from the ring buffer.
+            usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+        }
+    }
+    xSemaphoreGive(tx_lock);
+    return size;
+}
+
+size_t HWCDC::write(uint8_t c)
+{
+    return write(&c, 1);
+}
+
+void HWCDC::flush(void)
+{
+    if(tx_ring_buf == NULL || tx_lock == NULL){
+        return;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return;
+    }
+    UBaseType_t uxItemsWaiting = 0;
+    vRingbufferGetInfo(tx_ring_buf, NULL, NULL, NULL, NULL, &uxItemsWaiting);
+    if(uxItemsWaiting){
+        // Now trigger the ISR to read data from the ring buffer.
+        usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
+    }
+    while(uxItemsWaiting){
+        delay(5);
+        vRingbufferGetInfo(tx_ring_buf, NULL, NULL, NULL, NULL, &uxItemsWaiting);
+    }
+    xSemaphoreGive(tx_lock);
+}
+
+/*
+ * READING
+*/
+
+size_t HWCDC::setRxBufferSize(size_t rx_queue_len){
+    if(rx_queue){
+        if(!rx_queue_len){
+            vQueueDelete(rx_queue);
+            rx_queue = NULL;
+        }
+        return 0;
+    }
+    rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));
+    if(!rx_queue){
+        return 0;
+    }
+    if(!tx_ring_buf){
+        tx_ring_buf = xRingbufferCreate(rx_queue_len, RINGBUF_TYPE_BYTEBUF);
+    }
+    return rx_queue_len;
+}
+
+int HWCDC::available(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    return uxQueueMessagesWaiting(rx_queue);
+}
+
+int HWCDC::peek(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c;
+    if(xQueuePeek(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+int HWCDC::read(void)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c = 0;
+    if(xQueueReceive(rx_queue, &c, 0)) {
+        return c;
+    }
+    return -1;
+}
+
+size_t HWCDC::read(uint8_t *buffer, size_t size)
+{
+    if(rx_queue == NULL){
+        return -1;
+    }
+    uint8_t c = 0;
+    size_t count = 0;
+    while(count < size && xQueueReceive(rx_queue, &c, 0)){
+        buffer[count++] = c;
+    }
+    return count;
+}
+
+/*
+ * DEBUG
+*/
+
+void HWCDC::setDebugOutput(bool en)
+{
+    if(en) {
+        uartSetDebug(NULL);
+        ets_install_putc1((void (*)(char)) &cdc0_write_char);
+    } else {
+        ets_install_putc1(NULL);
+    }
+}
+
+#if ARDUINO_USB_MODE
+#if ARDUINO_USB_CDC_ON_BOOT//Serial used for USB CDC
+HWCDC Serial;
+#else
+HWCDC USBSerial;
+#endif
+#endif
+
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/HWCDC.h

@@ -0,0 +1,109 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#pragma once
+
+#include "sdkconfig.h"
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+
+#include <inttypes.h>
+#include "esp_event.h"
+#include "Stream.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_HW_CDC_EVENTS);
+
+typedef enum {
+    ARDUINO_HW_CDC_ANY_EVENT = ESP_EVENT_ANY_ID,
+    ARDUINO_HW_CDC_CONNECTED_EVENT = 0,
+    ARDUINO_HW_CDC_BUS_RESET_EVENT,
+    ARDUINO_HW_CDC_RX_EVENT,
+    ARDUINO_HW_CDC_TX_EVENT,
+    ARDUINO_HW_CDC_MAX_EVENT,
+} arduino_hw_cdc_event_t;
+
+typedef union {
+    struct {
+            size_t len;
+    } rx;
+    struct {
+            size_t len;
+    } tx;
+} arduino_hw_cdc_event_data_t;
+
+class HWCDC: public Stream
+{
+public:
+    HWCDC();
+    ~HWCDC();
+
+    void onEvent(esp_event_handler_t callback);
+    void onEvent(arduino_hw_cdc_event_t event, esp_event_handler_t callback);
+
+    size_t setRxBufferSize(size_t);
+    size_t setTxBufferSize(size_t);
+    void setTxTimeoutMs(uint32_t timeout);
+    void begin(unsigned long baud=0);
+    void end();
+    
+    int available(void);
+    int availableForWrite(void);
+    int peek(void);
+    int read(void);
+    size_t read(uint8_t *buffer, size_t size);
+    size_t write(uint8_t);
+    size_t write(const uint8_t *buffer, size_t size);
+    void flush(void);
+    
+    inline size_t read(char * buffer, size_t size)
+    {
+        return read((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * buffer, size_t size)
+    {
+        return write((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * s)
+    {
+        return write((uint8_t*) s, strlen(s));
+    }
+    inline size_t write(unsigned long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(unsigned int n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(int n)
+    {
+        return write((uint8_t) n);
+    }
+    operator bool() const;
+    void setDebugOutput(bool);
+    uint32_t baudRate(){return 115200;}
+
+};
+
+#if ARDUINO_USB_MODE
+#if ARDUINO_USB_CDC_ON_BOOT//Serial used for USB CDC
+extern HWCDC Serial;
+#else
+extern HWCDC USBSerial;
+#endif
+#endif
+
+#endif /* CONFIG_IDF_TARGET_ESP32C3 */

cores/esp32/HardwareSerial.cpp

@@ -3,47 +3,384 @@
 #include <string.h>
 #include <inttypes.h>
 
+#include "pins_arduino.h"
 #include "HardwareSerial.h"
+#include "soc/soc_caps.h"
+#include "driver/uart.h"
+#include "freertos/queue.h"
+
+#ifndef SOC_RX0
+#if CONFIG_IDF_TARGET_ESP32
+#define SOC_RX0 3
+#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
+#define SOC_RX0 44
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define SOC_RX0 20
+#endif
+#endif
+
+#ifndef SOC_TX0
+#if CONFIG_IDF_TARGET_ESP32
+#define SOC_TX0 1
+#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
+#define SOC_TX0 43
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define SOC_TX0 21
+#endif
+#endif
+
+void serialEvent(void) __attribute__((weak));
+void serialEvent(void) {}
+
+#if SOC_UART_NUM > 1
+
+#ifndef RX1
+#if CONFIG_IDF_TARGET_ESP32
+#define RX1 9
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define RX1 18
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define RX1 18
+#elif CONFIG_IDF_TARGET_ESP32S3
+#define RX1 15
+#endif
+#endif
+
+#ifndef TX1
+#if CONFIG_IDF_TARGET_ESP32
+#define TX1 10
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define TX1 17
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define TX1 19
+#elif CONFIG_IDF_TARGET_ESP32S3
+#define TX1 16
+#endif
+#endif
+
+void serialEvent1(void) __attribute__((weak));
+void serialEvent1(void) {}
+#endif /* SOC_UART_NUM > 1 */
+
+#if SOC_UART_NUM > 2
+#ifndef RX2
+#if CONFIG_IDF_TARGET_ESP32
+#define RX2 16
+#elif CONFIG_IDF_TARGET_ESP32S3
+#define RX2 19 
+#endif
+#endif
+
+#ifndef TX2
+#if CONFIG_IDF_TARGET_ESP32
+#define TX2 17
+#elif CONFIG_IDF_TARGET_ESP32S3
+#define TX2 20
+#endif
+#endif
+
+void serialEvent2(void) __attribute__((weak));
+void serialEvent2(void) {}
+#endif /* SOC_UART_NUM > 2 */
 
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+HardwareSerial Serial0(0);
+#else
 HardwareSerial Serial(0);
+#endif
+#if SOC_UART_NUM > 1
 HardwareSerial Serial1(1);
+#endif
+#if SOC_UART_NUM > 2
 HardwareSerial Serial2(2);
 #endif
 
-HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}
-
-void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert)
+void serialEventRun(void)
 {
-    if(0 > _uart_nr || _uart_nr > 2) {
-        log_e("Serial number is invalid, please use 0, 1 or 2");
-        return;
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+    if(Serial0.available()) serialEvent();
+#else
+    if(Serial.available()) serialEvent();
+#endif
+#if SOC_UART_NUM > 1
+    if(Serial1.available()) serialEvent1();
+#endif
+#if SOC_UART_NUM > 2
+    if(Serial2.available()) serialEvent2();
+#endif
+}
+#endif
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+#define HSERIAL_MUTEX_LOCK()    do {} while (xSemaphoreTake(_lock, portMAX_DELAY) != pdPASS)
+#define HSERIAL_MUTEX_UNLOCK()  xSemaphoreGive(_lock)
+#else
+#define HSERIAL_MUTEX_LOCK()    
+#define HSERIAL_MUTEX_UNLOCK()  
+#endif
+
+HardwareSerial::HardwareSerial(int uart_nr) : 
+_uart_nr(uart_nr), 
+_uart(NULL),
+_rxBufferSize(256),
+_txBufferSize(0), 
+_onReceiveCB(NULL), 
+_onReceiveErrorCB(NULL),
+_onReceiveTimeout(true),
+_rxTimeout(10),
+_eventTask(NULL)
+#if !CONFIG_DISABLE_HAL_LOCKS
+    ,_lock(NULL)
+#endif
+{
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(_lock == NULL){
+        _lock = xSemaphoreCreateMutex();
+        if(_lock == NULL){
+            log_e("xSemaphoreCreateMutex failed");
+            return;
+        }
     }
-    if(_uart) {
-        end();
-    }
-    if(_uart_nr == 0 && rxPin < 0 && txPin < 0) {
-        rxPin = 3;
-        txPin = 1;
-    }
-    if(_uart_nr == 1 && rxPin < 0 && txPin < 0) {
-        rxPin = 9;
-        txPin = 10;
-    }
-    if(_uart_nr == 2 && rxPin < 0 && txPin < 0) {
-        rxPin = 16;
-        txPin = 17;
-    }
-    _uart = uartBegin(_uart_nr, baud, config, rxPin, txPin, 256, invert);
+#endif
 }
 
-void HardwareSerial::end()
+HardwareSerial::~HardwareSerial()
 {
-    if(uartGetDebug() == _uart_nr) {
-        uartSetDebug(0);
+    end();
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(_lock != NULL){
+        vSemaphoreDelete(_lock);
     }
+#endif
+}
+
+
+void HardwareSerial::_createEventTask(void *args)
+{
+    // Creating UART event Task
+    xTaskCreate(_uartEventTask, "uart_event_task", 2048, this, configMAX_PRIORITIES - 1, &_eventTask);
+    if (_eventTask == NULL) {
+        log_e(" -- UART%d Event Task not Created!", _uart_nr);
+    }
+}
+
+void HardwareSerial::_destroyEventTask(void)
+{
+    if (_eventTask != NULL) {
+        vTaskDelete(_eventTask);
+        _eventTask = NULL;
+    }
+}
+
+void HardwareSerial::onReceiveError(OnReceiveErrorCb function) 
+{
+    HSERIAL_MUTEX_LOCK();
+    // function may be NULL to cancel onReceive() from its respective task 
+    _onReceiveErrorCB = function;
+    // this can be called after Serial.begin(), therefore it shall create the event task
+    if (function != NULL && _uart != NULL && _eventTask == NULL) {
+        _createEventTask(this);
+    }
+    HSERIAL_MUTEX_UNLOCK();
+}
+
+void HardwareSerial::onReceive(OnReceiveCb function, bool onlyOnTimeout)
+{
+    HSERIAL_MUTEX_LOCK();
+    // function may be NULL to cancel onReceive() from its respective task 
+    _onReceiveCB = function;
+    // When Rx timeout is Zero (disabled), there is only one possible option that is callback when FIFO reaches 120 bytes
+    _onReceiveTimeout = _rxTimeout > 0 ? onlyOnTimeout : false;
+
+    // this can be called after Serial.begin(), therefore it shall create the event task
+    if (function != NULL && _uart != NULL && _eventTask == NULL) {
+        _createEventTask(this); // Create event task
+    }
+    HSERIAL_MUTEX_UNLOCK();
+}
+
+// timout is calculates in time to receive UART symbols at the UART baudrate.
+// the estimation is about 11 bits per symbol (SERIAL_8N1)
+void HardwareSerial::setRxTimeout(uint8_t symbols_timeout)
+{
+    HSERIAL_MUTEX_LOCK();
+    
+    // Zero disables timeout, thus, onReceive callback will only be called when RX FIFO reaches 120 bytes
+    // Any non-zero value will activate onReceive callback based on UART baudrate with about 11 bits per symbol 
+    _rxTimeout = symbols_timeout;   
+    if (!symbols_timeout) _onReceiveTimeout = false;  // only when RX timeout is disabled, we also must disable this flag 
+
+    if(_uart != NULL) uart_set_rx_timeout(_uart_nr, _rxTimeout); // Set new timeout
+    
+    HSERIAL_MUTEX_UNLOCK();
+}
+
+void HardwareSerial::eventQueueReset()
+{
+    QueueHandle_t uartEventQueue = NULL;
+    if (_uart == NULL) {
+	    return;
+    }
+    uartGetEventQueue(_uart, &uartEventQueue);
+    if (uartEventQueue != NULL) {
+        xQueueReset(uartEventQueue);
+    }
+}
+
+void HardwareSerial::_uartEventTask(void *args)
+{
+    HardwareSerial *uart = (HardwareSerial *)args;
+    uart_event_t event;
+    QueueHandle_t uartEventQueue = NULL;
+    uartGetEventQueue(uart->_uart, &uartEventQueue);
+    if (uartEventQueue != NULL) {
+        for(;;) {
+            //Waiting for UART event.
+            if(xQueueReceive(uartEventQueue, (void * )&event, (portTickType)portMAX_DELAY)) {
+                switch(event.type) {
+                    case UART_DATA:
+                        if(uart->_onReceiveCB && uart->available() > 0 && 
+                            ((uart->_onReceiveTimeout && event.timeout_flag) || !uart->_onReceiveTimeout) ) 
+                                uart->_onReceiveCB();
+                        break;
+                    case UART_FIFO_OVF:
+                        log_w("UART%d FIFO Overflow. Consider adding Hardware Flow Control to your Application.", uart->_uart_nr);
+                        if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(UART_FIFO_OVF_ERROR);
+                        break;
+                    case UART_BUFFER_FULL:
+                        log_w("UART%d Buffer Full. Consider increasing your buffer size of your Application.", uart->_uart_nr);
+                        if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(UART_BUFFER_FULL_ERROR);
+                        break;
+                    case UART_BREAK:
+                        log_w("UART%d RX break.", uart->_uart_nr);
+                        if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(UART_BREAK_ERROR);
+                        break;
+                    case UART_PARITY_ERR:
+                        log_w("UART%d parity error.", uart->_uart_nr);
+                        if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(UART_PARITY_ERROR);
+                        break;
+                    case UART_FRAME_ERR:
+                        log_w("UART%d frame error.", uart->_uart_nr);
+                        if(uart->_onReceiveErrorCB) uart->_onReceiveErrorCB(UART_FRAME_ERROR);
+                        break;
+                    default:
+                        log_w("UART%d unknown event type %d.", uart->_uart_nr, event.type);
+                        break;
+                }
+            }
+        }
+    }
+    vTaskDelete(NULL);
+}
+
+void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert, unsigned long timeout_ms, uint8_t rxfifo_full_thrhd)
+{
+    if(0 > _uart_nr || _uart_nr >= SOC_UART_NUM) {
+        log_e("Serial number is invalid, please use numers from 0 to %u", SOC_UART_NUM - 1);
+        return;
+    }
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(_lock == NULL){
+        log_e("MUTEX Lock failed. Can't begin.");
+        return;
+    }
+#endif
+
+    HSERIAL_MUTEX_LOCK();
+    // First Time or after end() --> set default Pins
+    if (!uartIsDriverInstalled(_uart)) {
+        switch (_uart_nr) {
+            case UART_NUM_0:
+                if (rxPin < 0 && txPin < 0) {
+                    rxPin = SOC_RX0;
+                    txPin = SOC_TX0;
+                }
+            break;
+#if SOC_UART_NUM > 1                   // may save some flash bytes...
+            case UART_NUM_1:
+               if (rxPin < 0 && txPin < 0) {
+                    rxPin = RX1;
+                    txPin = TX1;
+                }
+            break;
+#endif
+#if SOC_UART_NUM > 2                   // may save some flash bytes...
+            case UART_NUM_2:
+               if (rxPin < 0 && txPin < 0) {
+                    rxPin = RX2;
+                    txPin = TX2;
+                }
+            break;
+#endif
+            default:
+                log_e("Bad UART Number");
+                return;
+        }
+    }
+
+    if(_uart) {
+        // in this case it is a begin() over a previous begin() - maybe to change baud rate
+        // thus do not disable debug output
+        end(false);
+    }
+
+    // IDF UART driver keeps Pin setting on restarting. Negative Pin number will keep it unmodified.
+    _uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, _rxBufferSize, _txBufferSize, invert, rxfifo_full_thrhd);
+    if (!baud) {
+        // using baud rate as zero, forces it to try to detect the current baud rate in place
+        uartStartDetectBaudrate(_uart);
+        time_t startMillis = millis();
+        unsigned long detectedBaudRate = 0;
+        while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {
+            yield();
+        }
+
+        end(false);
+
+        if(detectedBaudRate) {
+            delay(100); // Give some time...
+            _uart = uartBegin(_uart_nr, detectedBaudRate, config, rxPin, txPin, _rxBufferSize, _txBufferSize, invert, rxfifo_full_thrhd);
+        } else {
+            log_e("Could not detect baudrate. Serial data at the port must be present within the timeout for detection to be possible");
+            _uart = NULL;
+        }
+    }
+    // create a task to deal with Serial Events when, for example, calling begin() twice to change the baudrate,
+    // or when setting the callback before calling begin() 
+    if (_uart != NULL && (_onReceiveCB != NULL || _onReceiveErrorCB != NULL) && _eventTask == NULL) {
+        _createEventTask(this);
+    }
+
+    // Set UART RX timeout
+    if (_uart != NULL) {
+        uart_set_rx_timeout(_uart_nr, _rxTimeout);
+    }
+
+    HSERIAL_MUTEX_UNLOCK();
+}
+
+void HardwareSerial::updateBaudRate(unsigned long baud)
+{
+	uartSetBaudRate(_uart, baud);
+}
+
+void HardwareSerial::end(bool fullyTerminate)
+{
+    // default Serial.end() will completely disable HardwareSerial, 
+    // including any tasks or debug message channel (log_x()) - but not for IDF log messages!
+    if(fullyTerminate) {
+        _onReceiveCB = NULL;
+        _onReceiveErrorCB = NULL;
+        if (uartGetDebug() == _uart_nr) {
+            uartSetDebug(0);
+        }
+    }
+    delay(10);
     uartEnd(_uart);
     _uart = 0;
+    _destroyEventTask();
 }
 
 void HardwareSerial::setDebugOutput(bool en)
@@ -55,7 +392,7 @@ void HardwareSerial::setDebugOutput(bool en)
         uartSetDebug(_uart);
     } else {
         if(uartGetDebug() == _uart_nr) {
-            uartSetDebug(0);
+            uartSetDebug(NULL);
         }
     }
 }
@@ -85,11 +422,34 @@ 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);
@@ -108,5 +468,54 @@ uint32_t  HardwareSerial::baudRate()
 }
 HardwareSerial::operator bool() const
 {
-    return true;
+    return uartIsDriverInstalled(_uart);
+}
+
+void HardwareSerial::setRxInvert(bool invert)
+{
+    uartSetRxInvert(_uart, invert);
+}
+
+// negative Pin value will keep it unmodified
+void HardwareSerial::setPins(int8_t rxPin, int8_t txPin, int8_t ctsPin, int8_t rtsPin)
+{
+    uartSetPins(_uart, rxPin, txPin, ctsPin, rtsPin);
+}
+
+// Enables or disables Hardware Flow Control using RTS and/or CTS pins (must use setAllPins() before)
+void HardwareSerial::setHwFlowCtrlMode(uint8_t mode, uint8_t threshold)
+{
+    uartSetHwFlowCtrlMode(_uart, mode, threshold);
+}
+
+size_t HardwareSerial::setRxBufferSize(size_t new_size) {
+
+    if (_uart) {
+        log_e("RX Buffer can't be resized when Serial is already running.\n");
+        return 0;
+    }
+
+    if (new_size <= SOC_UART_FIFO_LEN) {
+        log_e("RX Buffer must be higher than %d.\n", SOC_UART_FIFO_LEN);  // ESP32, S2, S3 and C3 means higher than 128
+        return 0;
+    }
+
+    _rxBufferSize = new_size;
+    return _rxBufferSize;
+}
+
+size_t HardwareSerial::setTxBufferSize(size_t new_size) {
+
+    if (_uart) {
+        log_e("TX Buffer can't be resized when Serial is already running.\n");
+        return 0;
+    }
+
+    if (new_size <= SOC_UART_FIFO_LEN) {
+        log_e("TX Buffer must be higher than %d.\n", SOC_UART_FIFO_LEN);  // ESP32, S2, S3 and C3 means higher than 128
+        return 0;
+    }
+
+    _txBufferSize = new_size;
+    return _txBufferSize;
 }

cores/esp32/HardwareSerial.h

@@ -22,31 +22,103 @@
  Modified 18 December 2014 by Ivan Grokhotkov (esp8266 platform support)
  Modified 31 March 2015 by Markus Sattler (rewrite the code for UART0 + UART1 support in ESP8266)
  Modified 25 April 2015 by Thomas Flayols (add configuration different from 8N1 in ESP8266)
+ Modified 13 October 2018 by Jeroen Döll (add baudrate detection)
+ Baudrate detection example usage (detection on Serial1):
+   void setup() {
+     Serial.begin(115200);
+     delay(100);
+     Serial.println();
+
+     Serial1.begin(0, SERIAL_8N1, -1, -1, true, 11000UL);  // Passing 0 for baudrate to detect it, the last parameter is a timeout in ms
+
+     unsigned long detectedBaudRate = Serial1.baudRate();
+     if(detectedBaudRate) {
+       Serial.printf("Detected baudrate is %lu\n", detectedBaudRate);
+     } else {
+       Serial.println("No baudrate detected, Serial1 will not work!");
+     }
+   }
+
+ Pay attention: the baudrate returned by baudRate() may be rounded, eg 115200 returns 115201
  */
 
 #ifndef HardwareSerial_h
 #define HardwareSerial_h
 
 #include <inttypes.h>
-
+#include <functional>
 #include "Stream.h"
 #include "esp32-hal.h"
+#include "soc/soc_caps.h"
+#include "HWCDC.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+
+typedef enum {
+    UART_BREAK_ERROR,
+    UART_BUFFER_FULL_ERROR,
+    UART_FIFO_OVF_ERROR,
+    UART_FRAME_ERROR,
+    UART_PARITY_ERROR
+} hardwareSerial_error_t;
+
+typedef std::function<void(void)> OnReceiveCb;
+typedef std::function<void(hardwareSerial_error_t)> OnReceiveErrorCb;
 
 class HardwareSerial: public Stream
 {
 public:
     HardwareSerial(int uart_nr);
+    ~HardwareSerial();
 
-    void begin(unsigned long baud, uint32_t config=SERIAL_8N1, int8_t rxPin=-1, int8_t txPin=-1, bool invert=false);
-    void end();
+    // setRxTimeout sets the timeout after which onReceive callback will be called (after receiving data, it waits for this time of UART rx inactivity to call the callback fnc)
+    // param symbols_timeout defines a timeout threshold in uart symbol periods. Setting 0 symbol timeout disables the callback call by timeout.
+    //                       Maximum timeout setting is calculacted automatically by IDF. If set above the maximum, it is ignored and an error is printed on Serial0 (check console).
+    //                       Examples: Maximum for 11 bits symbol is 92 (SERIAL_8N2, SERIAL_8E1, SERIAL_8O1, etc), Maximum for 10 bits symbol is 101 (SERIAL_8N1).
+    //                       For example symbols_timeout=1 defines a timeout equal to transmission time of one symbol (~11 bit) on current baudrate. 
+    //                       For a baudrate of 9600, SERIAL_8N1 (10 bit symbol) and symbols_timeout = 3, the timeout would be 3 / (9600 / 10) = 3.125 ms
+    void setRxTimeout(uint8_t symbols_timeout);
+
+    // onReceive will setup a callback that will be called whenever an UART interruption occurs (UART_INTR_RXFIFO_FULL or UART_INTR_RXFIFO_TOUT)
+    // UART_INTR_RXFIFO_FULL interrupt triggers at UART_FULL_THRESH_DEFAULT bytes received (defined as 120 bytes by default in IDF)
+    // UART_INTR_RXFIFO_TOUT interrupt triggers at UART_TOUT_THRESH_DEFAULT symbols passed without any reception (defined as 10 symbos by default in IDF)
+    // onlyOnTimeout parameter will define how onReceive will behave:
+    // Default: true -- The callback will only be called when RX Timeout happens. 
+    //                  Whole stream of bytes will be ready for being read on the callback function at once.
+    //                  This option may lead to Rx Overflow depending on the Rx Buffer Size and number of bytes received in the streaming
+    //         false -- The callback will be called when FIFO reaches 120 bytes and also on RX Timeout.
+    //                  The stream of incommig bytes will be "split" into blocks of 120 bytes on each callback.
+    //                  This option avoid any sort of Rx Overflow, but leaves the UART packet reassembling work to the Application.
+    void onReceive(OnReceiveCb function, bool onlyOnTimeout = true);
+
+    // onReceive will be called on error events (see hardwareSerial_error_t)
+    void onReceiveError(OnReceiveErrorCb function);
+
+    // eventQueueReset clears all events in the queue (the events that trigger onReceive and onReceiveError) - maybe usefull in some use cases
+    void eventQueueReset();
+ 
+    void begin(unsigned long baud, uint32_t config=SERIAL_8N1, int8_t rxPin=-1, int8_t txPin=-1, bool invert=false, unsigned long timeout_ms = 20000UL, uint8_t rxfifo_full_thrhd = 112);
+    void end(bool fullyTerminate = true);
+    void updateBaudRate(unsigned long baud);
     int available(void);
     int availableForWrite(void);
     int peek(void);
     int read(void);
+    size_t read(uint8_t *buffer, size_t size);
+    inline size_t read(char * buffer, size_t size)
+    {
+        return read((uint8_t*) buffer, size);
+    }
     void flush(void);
+    void flush( bool txOnly);
     size_t write(uint8_t);
     size_t write(const uint8_t *buffer, size_t size);
-
+    inline size_t write(const char * buffer, size_t size)
+    {
+        return write((uint8_t*) buffer, size);
+    }
     inline size_t write(const char * s)
     {
         return write((uint8_t*) s, strlen(s));
@@ -71,16 +143,59 @@ public:
     operator bool() const;
 
     void setDebugOutput(bool);
+    
+    void setRxInvert(bool);
+
+    // Negative Pin Number will keep it unmodified, thus this function can set individual pins
+    // SetPins shall be called after Serial begin()
+    void setPins(int8_t rxPin, int8_t txPin, int8_t ctsPin = -1, int8_t rtsPin = -1);
+    // Enables or disables Hardware Flow Control using RTS and/or CTS pins (must use setAllPins() before)
+    void setHwFlowCtrlMode(uint8_t mode = HW_FLOWCTRL_CTS_RTS, uint8_t threshold = 64);   // 64 is half FIFO Length
+
+    size_t setRxBufferSize(size_t new_size);
+    size_t setTxBufferSize(size_t new_size);
 
 protected:
     int _uart_nr;
     uart_t* _uart;
+    size_t _rxBufferSize;
+    size_t _txBufferSize;
+    OnReceiveCb _onReceiveCB;
+    OnReceiveErrorCb _onReceiveErrorCB;
+    // _onReceive and _rxTimeout have be consistent when timeout is disabled
+    bool _onReceiveTimeout;
+    uint8_t _rxTimeout;
+    TaskHandle_t _eventTask;
+#if !CONFIG_DISABLE_HAL_LOCKS
+    SemaphoreHandle_t _lock;
+#endif
+
+    void _createEventTask(void *args);
+    void _destroyEventTask(void);
+    static void _uartEventTask(void *args);
 };
 
+extern void serialEventRun(void) __attribute__((weak));
+
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SERIAL)
+#ifndef ARDUINO_USB_CDC_ON_BOOT
+#define ARDUINO_USB_CDC_ON_BOOT 0
+#endif
+#if ARDUINO_USB_CDC_ON_BOOT //Serial used for USB CDC
+#if !ARDUINO_USB_MODE
+#include "USB.h"
+#include "USBCDC.h"
+#endif
+extern HardwareSerial Serial0;
+#else
 extern HardwareSerial Serial;
+#endif
+#if SOC_UART_NUM > 1
 extern HardwareSerial Serial1;
+#endif
+#if SOC_UART_NUM > 2
 extern HardwareSerial Serial2;
 #endif
-
 #endif
+
+#endif // HardwareSerial_h

cores/esp32/IPAddress.cpp

@@ -120,3 +120,6 @@ bool IPAddress::fromString(const char *address)
     _address.bytes[3] = acc;
     return true;
 }
+
+// declared one time - as external in IPAddress.h
+IPAddress INADDR_NONE(0, 0, 0, 0);

cores/esp32/IPAddress.h

@@ -91,6 +91,6 @@ public:
     friend class DNSClient;
 };
 
-const IPAddress INADDR_NONE(0, 0, 0, 0);
-
+// changed to extern because const declaration creates copies in BSS of INADDR_NONE for each CPP unit that includes it
+extern IPAddress INADDR_NONE;
 #endif

cores/esp32/MD5Builder.cpp

@@ -19,7 +19,7 @@
 #include <Arduino.h>
 #include <MD5Builder.h>
 
-uint8_t hex_char_to_byte(uint8_t c)
+static uint8_t hex_char_to_byte(uint8_t c)
 {
     return  (c >= 'a' && c <= 'f') ? (c - ((uint8_t)'a' - 0xa)) :
             (c >= 'A' && c <= 'F') ? (c - ((uint8_t)'A' - 0xA)) :
@@ -28,13 +28,13 @@ uint8_t hex_char_to_byte(uint8_t c)
 
 void MD5Builder::begin(void)
 {
-    memset(_buf, 0x00, 16);
-    MD5Init(&_ctx);
+    memset(_buf, 0x00, ESP_ROM_MD5_DIGEST_LEN);
+    esp_rom_md5_init(&_ctx);
 }
 
 void MD5Builder::add(uint8_t * data, uint16_t len)
 {
-    MD5Update(&_ctx, data, len);
+    esp_rom_md5_update(&_ctx, data, len);
 }
 
 void MD5Builder::addHexString(const char * data)
@@ -82,7 +82,7 @@ bool MD5Builder::addStream(Stream & stream, const size_t maxLen)
         }
 
         // Update MD5 with buffer payload
-        MD5Update(&_ctx, buf, numBytesRead);
+        esp_rom_md5_update(&_ctx, buf, numBytesRead);
 
         // update available number of bytes
         maxLengthLeft -= numBytesRead;
@@ -94,24 +94,24 @@ bool MD5Builder::addStream(Stream & stream, const size_t maxLen)
 
 void MD5Builder::calculate(void)
 {
-    MD5Final(_buf, &_ctx);
+    esp_rom_md5_final(_buf, &_ctx);
 }
 
 void MD5Builder::getBytes(uint8_t * output)
 {
-    memcpy(output, _buf, 16);
+    memcpy(output, _buf, ESP_ROM_MD5_DIGEST_LEN);
 }
 
 void MD5Builder::getChars(char * output)
 {
-    for(uint8_t i = 0; i < 16; i++) {
+    for(uint8_t i = 0; i < ESP_ROM_MD5_DIGEST_LEN; i++) {
         sprintf(output + (i * 2), "%02x", _buf[i]);
     }
 }
 
 String MD5Builder::toString(void)
 {
-    char out[33];
+    char out[(ESP_ROM_MD5_DIGEST_LEN * 2) + 1];
     getChars(out);
     return String(out);
 }

cores/esp32/MD5Builder.h

@@ -21,13 +21,15 @@
 
 #include <WString.h>
 #include <Stream.h>
-#include "rom/md5_hash.h"
+
+#include "esp_system.h"
+#include "esp_rom_md5.h"
 
 class MD5Builder
 {
 private:
-    struct MD5Context _ctx;
-    uint8_t _buf[16];
+    md5_context_t _ctx;
+    uint8_t _buf[ESP_ROM_MD5_DIGEST_LEN];
 public:
     void begin(void);
     void add(uint8_t * data, uint16_t len);

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 > 64){
-        delete[] temp;
+    len = write((uint8_t*)temp, len);
+    if(temp != loc_buf){
+        free(temp);
     }
     return len;
 }
@@ -106,18 +111,12 @@ size_t Print::print(unsigned int n, int base)
 
 size_t Print::print(long n, int base)
 {
-    if(base == 0) {
-        return write(n);
-    } else if(base == 10) {
-        if(n < 0) {
-            int t = print('-');
-            n = -n;
-            return printNumber(n, 10) + t;
-        }
-        return printNumber(n, 10);
-    } else {
-        return printNumber(n, base);
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
     }
+    return printNumber(static_cast<unsigned long>(n), base) + t;
 }
 
 size_t Print::print(unsigned long n, int base)
@@ -129,6 +128,25 @@ size_t Print::print(unsigned long n, int base)
     }
 }
 
+size_t Print::print(long long n, int base)
+{
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
+    }
+    return printNumber(static_cast<unsigned long long>(n), base) + t;
+}
+
+size_t Print::print(unsigned long long n, int base)
+{
+    if (base == 0) {
+        return write(n);
+    } else {
+        return printNumber(n, base);
+    }
+}
+
 size_t Print::print(double n, int digits)
 {
     return printFloat(n, digits);
@@ -154,8 +172,10 @@ size_t Print::print(struct tm * timeinfo, const char * format)
     }
     char buf[64];
     size_t written = strftime(buf, 64, f, timeinfo);
-    print(buf);
-    return written;
+    if(written == 0){
+        return written;
+    }
+    return print(buf);
 }
 
 size_t Print::println(void)
@@ -219,6 +239,20 @@ size_t Print::println(unsigned long num, int base)
     return n;
 }
 
+size_t Print::println(long long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
+size_t Print::println(unsigned long long num, int base)
+{
+    size_t n = print(num, base);
+    n += println();
+    return n;
+}
+
 size_t Print::println(double num, int digits)
 {
     size_t n = print(num, digits);
@@ -244,7 +278,7 @@ size_t Print::println(struct tm * timeinfo, const char * format)
 
 size_t Print::printNumber(unsigned long n, uint8_t base)
 {
-    char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
+    char buf[8 * sizeof(n) + 1]; // Assumes 8-bit chars plus zero byte.
     char *str = &buf[sizeof(buf) - 1];
 
     *str = '\0';
@@ -255,11 +289,34 @@ size_t Print::printNumber(unsigned long n, uint8_t base)
     }
 
     do {
-        unsigned long m = n;
+        char c = n % base;
+        n /= base;
+
+        *--str = c < 10 ? c + '0' : c + 'A' - 10;
+    } while (n);
+
+    return write(str);
+}
+
+size_t Print::printNumber(unsigned long long n, uint8_t base)
+{
+    char buf[8 * sizeof(n) + 1]; // Assumes 8-bit chars plus zero byte.
+    char* str = &buf[sizeof(buf) - 1];
+
+    *str = '\0';
+
+    // prevent crash if called with base == 1
+    if (base < 2) {
+        base = 10;
+    }
+
+    do {
+        auto m = n;
         n /= base;
         char c = m - base * n;
+
         *--str = c < 10 ? c + '0' : c + 'A' - 10;
-    } while(n);
+    } while (n);
 
     return write(str);
 }

cores/esp32/Print.h

@@ -36,6 +36,7 @@ class Print
 private:
     int write_error;
     size_t printNumber(unsigned long, uint8_t);
+    size_t printNumber(unsigned long long, uint8_t);
     size_t printFloat(double, uint8_t);
 protected:
     void setWriteError(int err = 1)
@@ -72,6 +73,11 @@ public:
     }
 
     size_t printf(const char * format, ...)  __attribute__ ((format (printf, 2, 3)));
+
+    // add availableForWrite to make compatible with Arduino Print.h
+    // default to zero, meaning "a single write may block"
+    // should be overriden by subclasses with buffering
+    virtual int availableForWrite() { return 0; }
     size_t print(const __FlashStringHelper *);
     size_t print(const String &);
     size_t print(const char[]);
@@ -81,6 +87,8 @@ public:
     size_t print(unsigned int, int = DEC);
     size_t print(long, int = DEC);
     size_t print(unsigned long, int = DEC);
+    size_t print(long long, int = DEC);
+    size_t print(unsigned long long, int = DEC);
     size_t print(double, int = 2);
     size_t print(const Printable&);
     size_t print(struct tm * timeinfo, const char * format = NULL);
@@ -94,10 +102,15 @@ public:
     size_t println(unsigned int, int = DEC);
     size_t println(long, int = DEC);
     size_t println(unsigned long, int = DEC);
+    size_t println(long long, int = DEC);
+    size_t println(unsigned long long, int = DEC);
     size_t println(double, int = 2);
     size_t println(const Printable&);
     size_t println(struct tm * timeinfo, const char * format = NULL);
     size_t println(void);
+    
+    virtual void flush() { /* Empty implementation for backward compatibility */ }
+    
 };
 
 #endif

cores/esp32/Stream.cpp

@@ -82,24 +82,27 @@ 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)
+bool  Stream::find(const char *target)
 {
-    return findUntil(target, (char*) "");
+  return findUntil(target, strlen(target), NULL, 0);
 }
 
 // reads data from the stream until the target string of given length is found
 // returns true if target string is found, false if timed out
 bool Stream::find(const char *target, size_t length)
 {
-    return findUntil(target, length, NULL, 0);
+  return findUntil(target, length, NULL, 0);
 }
 
 // as find but search ends if the terminator string is found
-bool Stream::findUntil(const char *target, const char *terminator)
+bool  Stream::findUntil(const char *target, const char *terminator)
 {
-    return findUntil(target, strlen(target), terminator, strlen(terminator));
+  return findUntil(target, strlen(target), terminator, strlen(terminator));
 }
 
 // reads data from the stream until the target string of the given length is found
@@ -107,35 +110,78 @@ bool Stream::findUntil(const char *target, const char *terminator)
 // returns true if target string is found, false if terminated or timed out
 bool Stream::findUntil(const char *target, size_t targetLen, const char *terminator, size_t termLen)
 {
-    size_t index = 0;  // maximum target string length is 64k bytes!
-    size_t termIndex = 0;
-    int c;
+  if (terminator == NULL) {
+    MultiTarget t[1] = {{target, targetLen, 0}};
+    return findMulti(t, 1) == 0 ? true : false;
+  } else {
+    MultiTarget t[2] = {{target, targetLen, 0}, {terminator, termLen, 0}};
+    return findMulti(t, 2) == 0 ? true : false;
+  }
+}
 
-    if(*target == 0) {
-        return true;    // return true if target is a null string
+int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
+  // any zero length target string automatically matches and would make
+  // a mess of the rest of the algorithm.
+  for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+    if (t->len <= 0)
+      return t - targets;
+  }
+
+  while (1) {
+    int c = timedRead();
+    if (c < 0)
+      return -1;
+
+    for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+      // the simple case is if we match, deal with that first.
+      if (c == t->str[t->index]) {
+        if (++t->index == t->len)
+          return t - targets;
+        else
+          continue;
+      }
+
+      // if not we need to walk back and see if we could have matched further
+      // down the stream (ie '1112' doesn't match the first position in '11112'
+      // but it will match the second position so we can't just reset the current
+      // index to 0 when we find a mismatch.
+      if (t->index == 0)
+        continue;
+
+      int origIndex = t->index;
+      do {
+        --t->index;
+        // first check if current char works against the new current index
+        if (c != t->str[t->index])
+          continue;
+
+        // if it's the only char then we're good, nothing more to check
+        if (t->index == 0) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we need to check the rest of the found string
+        int diff = origIndex - t->index;
+        size_t i;
+        for (i = 0; i < t->index; ++i) {
+          if (t->str[i] != t->str[i + diff])
+            break;
+        }
+
+        // if we successfully got through the previous loop then our current
+        // index is good.
+        if (i == t->index) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we just try the next index
+      } while (t->index);
     }
-    while((c = timedRead()) > 0) {
-
-        if(c != target[index]) {
-            index = 0;    // reset index if any char does not match
-        }
-
-        if(c == target[index]) {
-            //////Serial.print("found "); Serial.write(c); Serial.print("index now"); Serial.println(index+1);
-            if(++index >= targetLen) { // return true if all chars in the target match
-                return true;
-            }
-        }
-
-        if(termLen > 0 && c == terminator[termIndex]) {
-            if(++termIndex >= termLen) {
-                return false;    // return false if terminate string found before target string
-            }
-        } else {
-            termIndex = 0;
-        }
-    }
-    return false;
+  }
+  // unreachable
+  return -1;
 }
 
 // returns the first valid (long) integer value from the current position.
@@ -210,7 +256,7 @@ float Stream::parseFloat(char skipChar)
         } else if(c >= '0' && c <= '9') {    // is c a digit?
             value = value * 10 + c - '0';
             if(isFraction) {
-                fraction *= 0.1;
+                fraction *= 0.1f;
             }
         }
         read();  // consume the character we got with peek

cores/esp32/Stream.h

@@ -48,7 +48,6 @@ public:
     virtual int available() = 0;
     virtual int read() = 0;
     virtual int peek() = 0;
-    virtual void flush() = 0;
 
     Stream():_startMillis(0)
     {
@@ -59,7 +58,8 @@ 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
-    size_t readBytes(uint8_t *buffer, size_t length)
+    virtual size_t readBytes(char *buffer, size_t length); // read chars from stream into buffer
+    virtual size_t readBytes(uint8_t *buffer, size_t length)
     {
         return readBytes((char *) buffer, length);
     }
@@ -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:
@@ -123,6 +123,17 @@ protected:
     // this allows format characters (typically commas) in values to be ignored
 
     float parseFloat(char skipChar);  // as above but the given skipChar is ignored
+  
+    struct MultiTarget {
+      const char *str;  // string you're searching for
+      size_t len;       // length of string you're searching for
+      size_t index;     // index used by the search routine.
+    };
+
+  // This allows you to search for an arbitrary number of strings.
+  // Returns index of the target that is found first or -1 if timeout occurs.
+  int findMulti(struct MultiTarget *targets, int tCount);
+
 };
 
 #endif

cores/esp32/StreamString.cpp

@@ -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)) {
-            memcpy((void *) (buffer + len), (const void *) data, size);
-            len += size;
-            *(buffer + len) = 0x00; // add null for string end
+        const unsigned int newlen = length() + size;
+        if(reserve(newlen + 1)) {
+            memcpy((void *) (wbuffer() + len()), (const void *) data, size);
+            setLen(newlen);
+            *(wbuffer() + newlen) = 0x00; // add null for string end
             return size;
         }
     }
     return 0;
 }
 
-size_t StreamString::write(uint8_t data)
-{
+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/Tone.cpp

@@ -0,0 +1,131 @@
+#include <Arduino.h>
+#include "esp32-hal-ledc.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+
+static TaskHandle_t _tone_task = NULL;
+static QueueHandle_t _tone_queue = NULL;
+static uint8_t _channel = 0;
+
+typedef enum{
+  TONE_START,
+  TONE_END,
+  TONE_SET_CHANNEL
+} tone_cmd_t;
+
+typedef struct{
+  tone_cmd_t tone_cmd;
+  uint8_t pin;
+  unsigned int frequency;
+  unsigned long duration;
+  uint8_t channel;
+} tone_msg_t;
+
+static void tone_task(void*){
+  tone_msg_t tone_msg;
+  while(1){
+    xQueueReceive(_tone_queue, &tone_msg, portMAX_DELAY);
+    switch(tone_msg.tone_cmd){
+      case TONE_START:
+        log_d("Task received from queue TONE_START: _pin=%d, frequency=%u Hz, duration=%u ms", tone_msg.pin, tone_msg.frequency, tone_msg.duration);
+
+        log_d("Setup LED controll on channel %d", _channel);
+        // ledcSetup(_channel, tone_msg.frequency, 11);
+        // ledcAttachPin(tone_msg.pin, _channel);
+        // ledcWrite(_channel, 1024);
+        ledcWriteTone(_channel, tone_msg.frequency);
+        ledcAttachPin(tone_msg.pin, _channel);
+
+        if(tone_msg.duration){
+          delay(tone_msg.duration);
+          ledcDetachPin(tone_msg.pin);
+          ledcWriteTone(_channel, 0);
+        }
+        break;
+
+      case TONE_END:
+        log_d("Task received from queue TONE_END: pin=%d", tone_msg.pin);
+        ledcDetachPin(tone_msg.pin);
+        ledcWriteTone(_channel, 0);
+        break;
+
+      case TONE_SET_CHANNEL:
+        log_d("Task received from queue TONE_SET_CHANNEL: channel=%d", tone_msg.channel);
+        _channel = tone_msg.channel;
+        break;
+
+      default: ; // do nothing
+    } // switch
+  } // infinite loop
+}
+
+static int tone_init(){
+  if(_tone_queue == NULL){
+    log_v("Creating tone queue");
+    _tone_queue = xQueueCreate(128, sizeof(tone_msg_t));
+    if(_tone_queue == NULL){
+      log_e("Could not create tone queue");
+      return 0; // ERR
+    }
+    log_v("Tone queue created");
+  }
+
+  if(_tone_task == NULL){
+    log_v("Creating tone task");
+    xTaskCreate(
+      tone_task, // Function to implement the task
+      "toneTask", // Name of the task
+      3500,  // Stack size in words
+      NULL,  // Task input parameter
+      1,  // Priority of the task
+      &_tone_task  // Task handle.
+      );
+    if(_tone_task == NULL){
+      log_e("Could not create tone task");
+      return 0; // ERR
+    }
+    log_v("Tone task created");
+  }
+  return 1; // OK
+}
+
+void setToneChannel(uint8_t channel){
+  log_d("channel=%d", channel);
+  if(tone_init()){
+    tone_msg_t tone_msg = {
+      .tone_cmd = TONE_SET_CHANNEL,
+      .channel = channel
+    };
+    xQueueSend(_tone_queue, &tone_msg, portMAX_DELAY);
+  }
+}
+
+void noTone(uint8_t _pin){
+  log_d("noTone was called");
+  if(tone_init()){
+    tone_msg_t tone_msg = {
+      .tone_cmd = TONE_END,
+      .pin = _pin
+    };
+    xQueueSend(_tone_queue, &tone_msg, portMAX_DELAY);
+  }
+}
+
+// parameters:
+// _pin - pin number which will output the signal
+// frequency - PWM frequency in Hz
+// duration - time in ms - how long will the signal be outputted.
+//   If not provided, or 0 you must manually call noTone to end output
+void tone(uint8_t _pin, unsigned int frequency, unsigned long duration){
+  log_d("_pin=%d, frequency=%u Hz, duration=%u ms", _pin, frequency, duration);
+  if(tone_init()){
+    tone_msg_t tone_msg = {
+      .tone_cmd = TONE_START,
+      .pin = _pin,
+      .frequency = frequency,
+      .duration = duration
+    };
+    xQueueSend(_tone_queue, &tone_msg, portMAX_DELAY);
+  }
+}

cores/esp32/USB.cpp

@@ -0,0 +1,357 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "USB.h"
+
+#if CONFIG_TINYUSB_ENABLED
+
+#include "pins_arduino.h"
+#include "esp32-hal.h"
+#include "esp32-hal-tinyusb.h"
+#include "common/tusb_common.h"
+#include "StreamString.h"
+
+#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
+#if CONFIG_IDF_TARGET_ESP32S3
+#define USB_SERIAL "__MAC__"
+#else
+#define USB_SERIAL "0"
+#endif
+#endif
+#ifndef USB_WEBUSB_ENABLED
+#define USB_WEBUSB_ENABLED false
+#endif
+#ifndef USB_WEBUSB_URL
+#define USB_WEBUSB_URL "https://espressif.github.io/arduino-esp32/webusb.html"
+#endif
+
+#if CFG_TUD_DFU_RUNTIME
+static uint16_t load_dfu_descriptor(uint8_t * dst, uint8_t * itf)
+{
+#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_runtime_reboot_to_dfu_cb(void)
+{
+    usb_persist_restart(RESTART_BOOTLOADER_DFU);
+}
+#endif /* CFG_TUD_DFU_RUNTIME */
+
+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;
+    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;
+    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;
+    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;
+    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(USB_WEBUSB_ENABLED)
+,webusb_url(USB_WEBUSB_URL)
+,_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){
+#if CONFIG_IDF_TARGET_ESP32S3
+        if(serial_number == "__MAC__"){
+            StreamString s;
+            uint8_t m[6];
+            esp_efuse_mac_get_default(m);
+            s.printf("%02X:%02X:%02X:%02X:%02X:%02X", m[0], m[1], m[2], m[3], m[4], m[5]);
+            serial_number = s;
+        }
+#endif
+        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_RUNTIME
+    return tinyusb_enable_interface(USB_INTERFACE_DFU, TUD_DFU_RT_DESC_LEN, load_dfu_descriptor) == ESP_OK;
+#endif /* CFG_TUD_DFU_RUNTIME */
+    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;
+        if(enabled && usb_version < 0x0210){
+            usb_version = 0x0210;
+        }
+    }
+    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_TINYUSB_ENABLED */

cores/esp32/USB.h

@@ -0,0 +1,119 @@
+// 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_TINYUSB_ENABLED
+
+#include "esp_event.h"
+#include "USBCDC.h"
+
+#define ARDUINO_USB_ON_BOOT (ARDUINO_USB_CDC_ON_BOOT|ARDUINO_USB_MSC_ON_BOOT|ARDUINO_USB_DFU_ON_BOOT)
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_USB_EVENTS);
+
+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_TINYUSB_ENABLED */

cores/esp32/USBCDC.cpp

@@ -0,0 +1,453 @@
+// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "USB.h"
+#if CONFIG_TINYUSB_CDC_ENABLED
+
+#include "USBCDC.h"
+#include "esp32-hal-tinyusb.h"
+
+ESP_EVENT_DEFINE_BASE(ARDUINO_USB_CDC_EVENTS);
+esp_err_t arduino_usb_event_post(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait);
+esp_err_t arduino_usb_event_handler_register_with(esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg);
+
+#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");
+    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;
+}
+
+// Invoked when line state DTR & RTS are changed via SET_CONTROL_LINE_STATE
+void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
+{
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onLineState(dtr, rts);
+    }
+}
+
+// Invoked when line coding is change via SET_LINE_CODING
+void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* p_line_coding)
+{
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onLineCoding(p_line_coding->bit_rate, p_line_coding->stop_bits, p_line_coding->parity, p_line_coding->data_bits);
+    }
+}
+
+// Invoked when received new data
+void tud_cdc_rx_cb(uint8_t itf)
+{
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onRX();
+    }
+}
+
+// Invoked when received send break
+void tud_cdc_send_break_cb(uint8_t itf, uint16_t duration_ms){
+    //log_v("itf: %u, duration_ms: %u", itf, duration_ms);
+}
+
+// Invoked when space becomes available in TX buffer
+void tud_cdc_tx_complete_cb(uint8_t itf){
+    if(itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL){
+        devices[itf]->_onTX();
+    }
+}
+
+static void ARDUINO_ISR_ATTR cdc0_write_char(char c){
+    if(devices[0] != NULL){
+        devices[0]->write(c);
+    }
+}
+
+static void usb_unplugged_cb(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
+    ((USBCDC*)arg)->_onUnplugged();
+}
+
+USBCDC::USBCDC(uint8_t itfn) 
+: itf(itfn)
+, bit_rate(0)
+, stop_bits(0)
+, parity(0)
+, data_bits(0)
+, dtr(false)
+, rts(false)
+, connected(false)
+, reboot_enable(true)
+, rx_queue(NULL)
+, tx_lock(NULL)
+, tx_timeout_ms(250)
+{
+    tinyusb_enable_interface(USB_INTERFACE_CDC, TUD_CDC_DESC_LEN, load_cdc_descriptor);
+    if(itf < MAX_USB_CDC_DEVICES){
+        arduino_usb_event_handler_register_with(ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, usb_unplugged_cb, this);
+    }
+}
+
+USBCDC::~USBCDC(){
+    end();
+}
+
+void USBCDC::onEvent(esp_event_handler_t callback){
+    onEvent(ARDUINO_USB_CDC_ANY_EVENT, callback);
+}
+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){
+    size_t currentQueueSize = rx_queue ? 
+            uxQueueSpacesAvailable(rx_queue) + uxQueueMessagesWaiting(rx_queue) : 0;
+
+    if (rx_queue_len != currentQueueSize) {
+        xQueueHandle new_rx_queue = NULL;
+        if (rx_queue_len) {
+            new_rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));
+            if(!new_rx_queue){
+                log_e("CDC Queue creation failed.");
+                return 0;
+            }
+            if (rx_queue) {
+                size_t copySize = uxQueueMessagesWaiting(rx_queue);
+                if (copySize > 0) {
+                    for(size_t i = 0; i < copySize; i++) {
+                        uint8_t ch = 0;
+                        xQueueReceive(rx_queue, &ch, 0);
+                        if (!xQueueSend(new_rx_queue, &ch, 0)) {
+                            arduino_usb_cdc_event_data_t p;
+                            p.rx_overflow.dropped_bytes = copySize - i;
+                            arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_RX_OVERFLOW_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+                            log_e("CDC RX Overflow.");
+                            break;
+                        }
+                    }    
+                }
+                vQueueDelete(rx_queue);
+            }
+            rx_queue = new_rx_queue;
+            return rx_queue_len;
+        } else {
+            if (rx_queue) {
+                    vQueueDelete(rx_queue);
+                    rx_queue = NULL;
+            }
+        }
+    }
+    return rx_queue_len;
+}
+
+void USBCDC::begin(unsigned long baud)
+{
+    if(tx_lock == NULL) {
+        tx_lock = xSemaphoreCreateMutex();
+    }
+    // if rx_queue was set before begin(), keep it
+    if (!rx_queue) setRxBufferSize(256); //default if not preset
+    devices[itf] = this;
+}
+
+void USBCDC::end()
+{
+    connected = false;
+    devices[itf] = NULL;
+    setRxBufferSize(0);
+    if(tx_lock != NULL) {
+        vSemaphoreDelete(tx_lock);
+        tx_lock = NULL;
+    }
+}
+
+void USBCDC::setTxTimeoutMs(uint32_t timeout){
+    tx_timeout_ms = timeout;
+}
+
+void USBCDC::_onUnplugged(void){
+    if(connected){
+        connected = false;
+        dtr = false;
+        rts = false;
+        arduino_usb_cdc_event_data_t p;
+        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+    }
+}
+
+enum { CDC_LINE_IDLE, CDC_LINE_1, CDC_LINE_2, CDC_LINE_3 };
+void USBCDC::_onLineState(bool _dtr, bool _rts){
+    static uint8_t lineState = CDC_LINE_IDLE;
+
+    if(dtr == _dtr && rts == _rts){
+        return; // Skip duplicate events
+    }
+
+    dtr = _dtr;
+    rts = _rts;
+
+    if(reboot_enable){
+        if(!dtr && rts){
+            if(lineState == CDC_LINE_IDLE){
+                lineState++;
+                if(connected){
+                    connected = false;
+                    arduino_usb_cdc_event_data_t p;
+                    arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+                }
+            } else {
+                lineState = CDC_LINE_IDLE;
+            }
+        } 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;
+            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 && connected){
+            connected = false;
+            arduino_usb_cdc_event_data_t p;
+            arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+        }
+        arduino_usb_cdc_event_data_t l;
+        l.line_state.dtr = dtr;
+        l.line_state.rts = rts;
+        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_LINE_STATE_EVENT, &l, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+    }
+
+}
+
+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){
+        // ArduinoIDE sends LineCoding with 1200bps baud to reset the device
+        if(reboot_enable && _bit_rate == 1200){
+            usb_persist_restart(RESTART_BOOTLOADER);
+        } else {
+            bit_rate = _bit_rate;
+            data_bits = _data_bits;
+            stop_bits = _stop_bits;
+            parity = _parity;
+            arduino_usb_cdc_event_data_t p;
+            p.line_coding.bit_rate = bit_rate;
+            p.line_coding.data_bits = data_bits;
+            p.line_coding.stop_bits = stop_bits;
+            p.line_coding.parity = parity;
+            arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_LINE_CODING_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+        }
+    }
+}
+
+void USBCDC::_onRX(){
+    arduino_usb_cdc_event_data_t p;
+    uint8_t buf[CONFIG_TINYUSB_CDC_RX_BUFSIZE+1];
+    uint32_t count = tud_cdc_n_read(itf, buf, CONFIG_TINYUSB_CDC_RX_BUFSIZE);
+    for(uint32_t i=0; i<count; i++){
+        if(rx_queue == NULL || !xQueueSend(rx_queue, buf+i, 10)) {
+            p.rx_overflow.dropped_bytes = count - i;
+            arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_RX_OVERFLOW_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+            log_e("CDC RX Overflow.");
+            count = i;
+            break;
+        }
+    }
+    if (count) {
+        p.rx.len = count;
+        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_RX_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+    }
+}
+
+void USBCDC::_onTX(){
+    arduino_usb_cdc_event_data_t p;
+    arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_TX_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+}
+
+void  USBCDC::enableReboot(bool enable){
+    reboot_enable = enable;
+}
+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 || tx_lock == NULL || !tud_cdc_n_connected(itf)){
+        return;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return;
+    }
+    tud_cdc_n_write_flush(itf);
+    xSemaphoreGive(tx_lock);
+}
+
+int USBCDC::availableForWrite(void)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || !tud_cdc_n_connected(itf)){
+        return 0;
+    }
+    if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t a = tud_cdc_n_write_available(itf);
+    xSemaphoreGive(tx_lock);
+    return a;
+}
+
+size_t USBCDC::write(const uint8_t *buffer, size_t size)
+{
+    if(itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || buffer == NULL || size == 0 || !tud_cdc_n_connected(itf)){
+        return 0;
+    }
+    if(xPortInIsrContext()){
+        BaseType_t taskWoken = false;
+        if(xSemaphoreTakeFromISR(tx_lock, &taskWoken) != pdPASS){
+            return 0;
+        }
+    } else if(xSemaphoreTake(tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS){
+        return 0;
+    }
+    size_t to_send = size, so_far = 0;
+    while(to_send){
+        if(!tud_cdc_n_connected(itf)){
+            size = so_far;
+            break;
+        }
+        size_t space = tud_cdc_n_write_available(itf);
+        if(!space){
+            tud_cdc_n_write_flush(itf);
+            continue;
+        }
+        if(space > to_send){
+            space = to_send;
+        }
+        size_t sent = tud_cdc_n_write(itf, buffer+so_far, space);
+        if(sent){
+            so_far += sent;
+            to_send -= sent;
+            tud_cdc_n_write_flush(itf);
+        } else {
+            size = so_far;
+            break;
+        }
+    }
+    if(xPortInIsrContext()){
+        BaseType_t taskWoken = false;
+        xSemaphoreGiveFromISR(tx_lock, &taskWoken);
+    } else {
+        xSemaphoreGive(tx_lock);
+    }
+    return size;
+}
+
+size_t USBCDC::write(uint8_t c)
+{
+    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_USB_CDC_ON_BOOT && !ARDUINO_USB_MODE //Serial used for USB CDC
+USBCDC Serial(0);
+#endif
+
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/USBCDC.h

@@ -0,0 +1,145 @@
+// 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_TINYUSB_CDC_ENABLED
+
+#include <inttypes.h>
+#include "esp_event.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+#include "Stream.h"
+
+ESP_EVENT_DECLARE_BASE(ARDUINO_USB_CDC_EVENTS);
+
+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_TX_EVENT,
+    ARDUINO_USB_CDC_RX_OVERFLOW_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;
+    struct {
+            size_t dropped_bytes;
+    } rx_overflow;
+} arduino_usb_cdc_event_data_t;
+
+class USBCDC: public Stream
+{
+public:
+    USBCDC(uint8_t itf=0);
+    ~USBCDC();
+
+    void onEvent(esp_event_handler_t callback);
+    void onEvent(arduino_usb_cdc_event_t event, esp_event_handler_t callback);
+
+    size_t setRxBufferSize(size_t size);
+    void setTxTimeoutMs(uint32_t timeout);
+    void begin(unsigned long baud=0);
+    void end();
+    
+    int available(void);
+    int availableForWrite(void);
+    int peek(void);
+    int read(void);
+    size_t read(uint8_t *buffer, size_t size);
+    size_t write(uint8_t);
+    size_t write(const uint8_t *buffer, size_t size);
+    void flush(void);
+    
+    inline size_t read(char * buffer, size_t size)
+    {
+        return read((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * buffer, size_t size)
+    {
+        return write((uint8_t*) buffer, size);
+    }
+    inline size_t write(const char * s)
+    {
+        return write((uint8_t*) s, strlen(s));
+    }
+    inline size_t write(unsigned long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(long n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(unsigned int n)
+    {
+        return write((uint8_t) n);
+    }
+    inline size_t write(int n)
+    {
+        return write((uint8_t) n);
+    }
+    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 _onTX(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;
+    xSemaphoreHandle tx_lock;
+    uint32_t tx_timeout_ms;
+    
+};
+
+#if ARDUINO_USB_CDC_ON_BOOT && !ARDUINO_USB_MODE //Serial used for USB CDC
+extern USBCDC Serial;
+#endif
+
+#endif /* CONFIG_TINYUSB_CDC_ENABLED */

cores/esp32/USBMSC.cpp

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

cores/esp32/USBMSC.h

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

cores/esp32/Udp.h

@@ -43,6 +43,7 @@ class UDP: public Stream
 
 public:
     virtual uint8_t begin(uint16_t) =0;	// initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
+    virtual uint8_t beginMulticast(IPAddress, uint16_t) { return 0; }  // initialize, start listening on specified multicast IP address and port. Returns 1 if successful, 0 on failure
     virtual void stop() =0;  // Finish with the UDP socket
 
     // Sending UDP packets

cores/esp32/WMath.cpp

@@ -27,6 +27,7 @@ extern "C" {
 #include <stdlib.h>
 #include "esp_system.h"
 }
+#include "esp32-hal-log.h"
 
 void randomSeed(unsigned long seed)
 {
@@ -37,10 +38,23 @@ void randomSeed(unsigned long seed)
 
 long random(long howbig)
 {
-    if(howbig == 0) {
-        return 0;
+    uint32_t x = esp_random();
+    uint64_t m = uint64_t(x) * uint64_t(howbig);
+    uint32_t l = uint32_t(m);
+    if (l < howbig) {
+        uint32_t t = -howbig;
+        if (t >= howbig) {
+            t -= howbig;
+            if (t >= howbig)
+                t %= howbig;
+        }
+        while (l < t) {
+            x = esp_random();
+            m = uint64_t(x) * uint64_t(howbig);
+            l = uint32_t(m);
+        }
     }
-    return esp_random() % howbig;
+    return m >> 32;
 }
 
 long random(long howsmall, long howbig)
@@ -52,17 +66,23 @@ 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)
-{
-    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+long map(long x, long in_min, long in_max, long out_min, long out_max) {
+    const long run = in_max - in_min;
+    if(run == 0){
+        log_e("map(): Invalid input range, min == max");
+        return -1; // AVR returns -1, SAM returns 0
+    }
+    const long rise = out_max - out_min;
+    const long delta = x - in_min;
+    return (delta * rise) / run + out_min;
 }
 
-unsigned int makeWord(unsigned int w)
+uint16_t makeWord(uint16_t w)
 {
     return w;
 }
 
-unsigned int makeWord(unsigned char h, unsigned char l)
+uint16_t makeWord(uint8_t h, uint8_t l)
 {
     return (h << 8) | l;
 }

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.
@@ -35,294 +36,346 @@ 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
-{
-    // use a function pointer to allow for "if (s)" without the
-    // complications of an operator bool(). for more information, see:
-    // http://www.artima.com/cppsource/safebool.html
-    typedef void (String::*StringIfHelperType)() const;
-    void StringIfHelper() const
-    {
-    }
-
-public:
-    // constructors
-    // creates a copy of the initial value.
-    // if the initial value is null or invalid, or if memory allocation
-    // fails, the string will be marked as invalid (i.e. "if (s)" will
-    // be false).
-    String(const char *cstr = "");
-    String(const 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;
+class String {
+        // use a function pointer to allow for "if (s)" without the
+        // complications of an operator bool(). for more information, see:
+        // http://www.artima.com/cppsource/safebool.html
+        typedef void (String::*StringIfHelperType)() const;
+        void StringIfHelper() const {
         }
-    }
 
-    // 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);
+    public:
+        // constructors
+        // creates a copy of the initial value.
+        // if the initial value is null or invalid, or if memory allocation
+        // fails, the string will be marked as invalid (i.e. "if (s)" will
+        // be false).
+        String(const char *cstr = "");
+        String(const char *cstr, unsigned int length);
 #ifdef __GXX_EXPERIMENTAL_CXX0X__
-    String & operator =(String &&rval);
-    String & operator =(StringSumHelper &&rval);
+        String(const uint8_t *cstr, unsigned int length) : String((const char*)cstr, length) {}
+#endif
+        String(const String &str);
+        String(const __FlashStringHelper *str);
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+        String(String &&rval);
+        String(StringSumHelper &&rval);
+#endif
+        explicit String(char c);
+        explicit String(unsigned char, unsigned char base = 10);
+        explicit String(int, unsigned char base = 10);
+        explicit String(unsigned int, unsigned char base = 10);
+        explicit String(long, unsigned char base = 10);
+        explicit String(unsigned long, unsigned char base = 10);
+        explicit String(float, unsigned int decimalPlaces = 2);
+        explicit String(double, unsigned int 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
-    // is left unchanged).  if the argument is null or invalid, the
-    // concatenation is considered unsucessful.
-    unsigned char concat(const String &str);
-    unsigned char concat(const char *cstr);
-    unsigned char concat(char c);
-    unsigned char concat(unsigned char c);
-    unsigned char concat(int num);
-    unsigned char concat(unsigned int num);
-    unsigned char concat(long num);
-    unsigned char concat(unsigned long num);
-    unsigned char concat(float num);
-    unsigned char concat(double num);
-    unsigned char concat(const __FlashStringHelper * str);
+        // returns true on success, false on failure (in which case, the string
+        // is left unchanged).  if the argument is null or invalid, the
+        // concatenation is considered unsuccessful.
+        unsigned char concat(const String &str);
+        unsigned char concat(const char *cstr);
+        unsigned char concat(const char *cstr, unsigned int length);
+        unsigned char concat(const uint8_t *cstr, unsigned int length) {return concat((const char*)cstr, length);}
+        unsigned char concat(char c);
+        unsigned char concat(unsigned char c);
+        unsigned char concat(int num);
+        unsigned char concat(unsigned int num);
+        unsigned char concat(long num);
+        unsigned char concat(unsigned long num);
+        unsigned char concat(float num);
+        unsigned char concat(double num);
+        unsigned char concat(const __FlashStringHelper * str);
 
-    // if there's not enough memory for the concatenated value, the string
-    // will be left unchanged (but this isn't signalled in any way)
-    String & operator +=(const String &rhs)
-    {
-        concat(rhs);
-        return (*this);
-    }
-    String & operator +=(const char *cstr)
-    {
-        concat(cstr);
-        return (*this);
-    }
-    String & operator +=(char c)
-    {
-        concat(c);
-        return (*this);
-    }
-    String & operator +=(unsigned char num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(int num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(unsigned int num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(long num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(unsigned long num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(float num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator +=(double num)
-    {
-        concat(num);
-        return (*this);
-    }
-    String & operator += (const __FlashStringHelper *str)
-    {
-        concat(str);
-        return (*this);
-    }
+        // if there's not enough memory for the concatenated value, the string
+        // will be left unchanged (but this isn't signalled in any way)
+        String & operator +=(const String &rhs) {
+            concat(rhs);
+            return (*this);
+        }
+        String & operator +=(const char *cstr) {
+            concat(cstr);
+            return (*this);
+        }
+        String & operator +=(char c) {
+            concat(c);
+            return (*this);
+        }
+        String & operator +=(unsigned char num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(int num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(unsigned int num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(long num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(unsigned long num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(float num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator +=(double num) {
+            concat(num);
+            return (*this);
+        }
+        String & operator += (const __FlashStringHelper *str){
+            concat(str);
+            return (*this);
+        }
 
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, const String &rhs);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, char c);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, int num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned int num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, long num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned long num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, float num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, double num);
-    friend StringSumHelper & operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const String &rhs);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const char *cstr);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, char c);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned char num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, int num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned int num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, long num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, unsigned long num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, float num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, double num);
+        friend StringSumHelper & operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
 
-    // comparison (only works w/ Strings and "strings")
-    operator StringIfHelperType() const
-    {
-        return buffer ? &String::StringIfHelper : 0;
-    }
-    int compareTo(const String &s) const;
-    unsigned char equals(const String &s) const;
-    unsigned char equals(const char *cstr) const;
-    unsigned char operator ==(const String &rhs) const
-    {
-        return equals(rhs);
-    }
-    unsigned char operator ==(const char *cstr) const
-    {
-        return equals(cstr);
-    }
-    unsigned char operator !=(const String &rhs) const
-    {
-        return !equals(rhs);
-    }
-    unsigned char operator !=(const char *cstr) const
-    {
-        return !equals(cstr);
-    }
-    unsigned char operator <(const String &rhs) const;
-    unsigned char operator >(const String &rhs) const;
-    unsigned char operator <=(const String &rhs) const;
-    unsigned char operator >=(const String &rhs) const;
-    unsigned char equalsIgnoreCase(const String &s) const;
-    unsigned char equalsConstantTime(const String &s) const;
-    unsigned char startsWith(const String &prefix) const;
-    unsigned char startsWith(const String &prefix, unsigned int offset) const;
-    unsigned char endsWith(const String &suffix) const;
+        // comparison (only works w/ Strings and "strings")
+        operator StringIfHelperType() const {
+            return buffer() ? &String::StringIfHelper : 0;
+        }
+        int compareTo(const String &s) const;
+        unsigned char equals(const String &s) const;
+        unsigned char equals(const char *cstr) const;
+        unsigned char operator ==(const String &rhs) const {
+            return equals(rhs);
+        }
+        unsigned char operator ==(const char *cstr) const {
+            return equals(cstr);
+        }
+        unsigned char operator !=(const String &rhs) const {
+            return !equals(rhs);
+        }
+        unsigned char operator !=(const char *cstr) const {
+            return !equals(cstr);
+        }
+        unsigned char operator <(const String &rhs) const;
+        unsigned char operator >(const String &rhs) const;
+        unsigned char operator <=(const String &rhs) const;
+        unsigned char operator >=(const String &rhs) const;
+        unsigned char equalsIgnoreCase(const String &s) const;
+        unsigned char equalsConstantTime(const String &s) const;
+        unsigned char startsWith(const String &prefix) const;
+        unsigned char startsWith(const char *prefix) const {
+            return this->startsWith(String(prefix));
+        }
+        unsigned char startsWith(const __FlashStringHelper *prefix) const {
+            return this->startsWith(String(prefix));
+        }
+        unsigned char startsWith(const String &prefix, unsigned int offset) const;
+        unsigned char endsWith(const String &suffix) const;
+        unsigned char endsWith(const char *suffix) const {
+            return this->endsWith(String(suffix));
+        }
+        unsigned char endsWith(const __FlashStringHelper * suffix) const {
+            return this->endsWith(String(suffix));
+        }
 
-    // character acccess
-    char charAt(unsigned int index) const;
-    void setCharAt(unsigned int index, char c);
-    char operator [](unsigned int index) const;
-    char& operator [](unsigned int index);
-    void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index = 0) const;
-    void toCharArray(char *buf, unsigned int bufsize, unsigned int index = 0) const
-    {
-        getBytes((unsigned char *) buf, bufsize, index);
-    }
-    const char * c_str() const
-    {
-        return buffer;
-    }
+        // character access
+        char charAt(unsigned int index) const;
+        void setCharAt(unsigned int index, char c);
+        char operator [](unsigned int index) const;
+        char& operator [](unsigned int index);
+        void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index = 0) const;
+        void toCharArray(char *buf, unsigned int bufsize, unsigned int index = 0) const {
+            getBytes((unsigned char *) buf, bufsize, index);
+        }
+        const char* c_str() const { return buffer(); }
+        char* begin() { return wbuffer(); }
+        char* end() { return wbuffer() + length(); }
+        const char* begin() const { return c_str(); }
+        const char* end() const { return c_str() + length(); }
 
-    // search
-    int indexOf(char ch) const;
-    int indexOf(char ch, unsigned int fromIndex) const;
-    int indexOf(const String &str) const;
-    int indexOf(const String &str, unsigned int fromIndex) const;
-    int lastIndexOf(char ch) const;
-    int lastIndexOf(char ch, unsigned int fromIndex) const;
-    int lastIndexOf(const String &str) const;
-    int lastIndexOf(const String &str, unsigned int fromIndex) const;
-    String substring(unsigned int beginIndex) const
-    {
-        return substring(beginIndex, len);
-    }
-    ;
-    String substring(unsigned int beginIndex, unsigned int endIndex) const;
+        // search
+        int indexOf(char ch) const;
+        int indexOf(char ch, unsigned int fromIndex) const;
+        int indexOf(const String &str) const;
+        int indexOf(const String &str, unsigned int fromIndex) const;
+        int lastIndexOf(char ch) const;
+        int lastIndexOf(char ch, unsigned int fromIndex) const;
+        int lastIndexOf(const String &str) const;
+        int lastIndexOf(const String &str, unsigned int fromIndex) const;
+        String substring(unsigned int beginIndex) const {
+            return substring(beginIndex, len());
+        }
+        ;
+        String substring(unsigned int beginIndex, unsigned int endIndex) const;
 
-    // modification
-    void replace(char find, char replace);
-    void replace(const String& find, const String& replace);
-    void remove(unsigned int index);
-    void remove(unsigned int index, unsigned int count);
-    void toLowerCase(void);
-    void toUpperCase(void);
-    void trim(void);
+        // modification
+        void replace(char find, char replace);
+        void replace(const String &find, const String &replace);
+        void replace(const char *find, const String &replace) {
+            this->replace(String(find), replace);
+        }
+        void replace(const __FlashStringHelper *find, const String &replace) {
+            this->replace(String(find), replace);
+        }
+        void replace(const char *find, const char *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void replace(const __FlashStringHelper *find, const char *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void replace(const __FlashStringHelper *find, const __FlashStringHelper *replace) {
+            this->replace(String(find), String(replace));
+        }
+        void remove(unsigned int index);
+        void remove(unsigned int index, unsigned int count);
+        void toLowerCase(void);
+        void toUpperCase(void);
+        void trim(void);
 
-    // parsing/conversion
-    long toInt(void) const;
-    float toFloat(void) const;
+        // parsing/conversion
+        long toInt(void) const;
+        float toFloat(void) const;
+	double toDouble(void) const;
 
-protected:
-    char *buffer;	        // the actual char array
-    unsigned int capacity;  // the array length minus one (for the '\0')
-    unsigned int len;       // the String length (not counting the '\0')
-protected:
-    void init(void);
-    void invalidate(void);
-    unsigned char changeBuffer(unsigned int maxStrLen);
-    unsigned char concat(const char *cstr, unsigned int length);
+    protected:
+        // Contains the string info when we're not in SSO mode
+        struct _ptr { 
+            char *   buff;
+            uint32_t cap;
+            uint32_t len;
+        };
+        // This allows strings up up to 11 (10 + \0 termination) without any extra space.
+        enum { SSOSIZE = sizeof(struct _ptr) + 4 - 1 }; // Characters to allocate space for SSO, must be 12 or more
+        struct _sso {
+            char     buff[SSOSIZE];
+            unsigned char len   : 7; // Ensure only one byte is allocated by GCC for the bitfields
+            unsigned char isSSO : 1;
+        } __attribute__((packed)); // Ensure that GCC doesn't expand the flag byte to a 32-bit word for alignment issues
+#ifdef BOARD_HAS_PSRAM
+        enum { CAPACITY_MAX = 3145728 }; 
+#else
+        enum { CAPACITY_MAX = 65535 }; 
+#endif
+        union {
+            struct _ptr ptr;
+            struct _sso sso;
+        };
+        // Accessor functions
+        inline bool isSSO() const { return sso.isSSO; }
+        inline unsigned int len() const { return isSSO() ? sso.len : ptr.len; }
+        inline unsigned int capacity() const { return isSSO() ? (unsigned int)SSOSIZE - 1 : ptr.cap; } // Size of max string not including terminal NUL
+        inline void setSSO(bool set) { sso.isSSO = set; }
+        inline void setLen(int len) {
+            if (isSSO()) {
+                sso.len = len;
+                sso.buff[len] = 0;
+            } else {
+                ptr.len = len;
+                if (ptr.buff) {
+                    ptr.buff[len] = 0;
+                }
+            }
+        }
+        inline void setCapacity(int cap) { if (!isSSO()) ptr.cap = cap; }
+        inline void setBuffer(char *buff) { if (!isSSO()) ptr.buff = buff; }
+        // Buffer accessor functions
+        inline const char *buffer() const { return (const char *)(isSSO() ? sso.buff : ptr.buff); }
+        inline char *wbuffer() const { return isSSO() ? const_cast<char *>(sso.buff) : ptr.buff; } // Writable version of buffer
 
-    // copy and move
-    String & copy(const char *cstr, unsigned int length);
-    String & copy(const __FlashStringHelper *pstr, unsigned int length);
+    protected:
+        void init(void);
+        void invalidate(void);
+        unsigned char changeBuffer(unsigned int maxStrLen);
+
+        // copy and move
+        String & copy(const char *cstr, unsigned int length);
+        String & copy(const __FlashStringHelper *pstr, unsigned int length);
 #ifdef __GXX_EXPERIMENTAL_CXX0X__
-    void move(String &rhs);
+        void move(String &rhs);
 #endif
 };
 
-class StringSumHelper: public String
-{
-public:
-    StringSumHelper(const String &s) :
-        String(s)
-    {
-    }
-    StringSumHelper(const char *p) :
-        String(p)
-    {
-    }
-    StringSumHelper(char c) :
-        String(c)
-    {
-    }
-    StringSumHelper(unsigned char num) :
-        String(num)
-    {
-    }
-    StringSumHelper(int num) :
-        String(num)
-    {
-    }
-    StringSumHelper(unsigned int num) :
-        String(num)
-    {
-    }
-    StringSumHelper(long num) :
-        String(num)
-    {
-    }
-    StringSumHelper(unsigned long num) :
-        String(num)
-    {
-    }
-    StringSumHelper(float num) :
-        String(num)
-    {
-    }
-    StringSumHelper(double num) :
-        String(num)
-    {
-    }
+class StringSumHelper: public String {
+    public:
+        StringSumHelper(const String &s) :
+                String(s) {
+        }
+        StringSumHelper(const char *p) :
+                String(p) {
+        }
+        StringSumHelper(char c) :
+                String(c) {
+        }
+        StringSumHelper(unsigned char num) :
+                String(num) {
+        }
+        StringSumHelper(int num) :
+                String(num) {
+        }
+        StringSumHelper(unsigned int num) :
+                String(num) {
+        }
+        StringSumHelper(long num) :
+                String(num) {
+        }
+        StringSumHelper(unsigned long num) :
+                String(num) {
+        }
+        StringSumHelper(float num) :
+                String(num) {
+        }
+        StringSumHelper(double num) :
+                String(num) {
+        }
 };
 
+extern const String emptyString;
+
 #endif  // __cplusplus
 #endif  // String_class_h

cores/esp32/apps/sntp/sntp.h

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

cores/esp32/base64.cpp

@@ -31,14 +31,13 @@ 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)
 {
-    // base64 needs more size then the source data
-    size_t size = ((length * 1.6f) + 1);
+    size_t size = base64_encode_expected_len(length) + 1;
     char * buffer = (char *) malloc(size);
     if(buffer) {
         base64_encodestate _state;
@@ -55,10 +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(String text);
+    static String encode(const uint8_t * data, size_t length);
+    static String encode(const String& text);
 private:
 };
 

cores/esp32/cbuf.h

@@ -62,7 +62,7 @@ public:
 
     cbuf *next;
 
-private:
+protected:
     inline char* wrap_if_bufend(char* ptr) const
     {
         return (ptr == _bufend) ? _buf : ptr;

cores/esp32/esp32-hal-adc.c

@@ -15,103 +15,100 @@
 #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 "driver/adc.h"
+
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp_adc_cal.h"
 #include "soc/sens_reg.h"
+#include "soc/rtc_io_reg.h"
+#include "esp32/rom/ets_sys.h"
+#include "esp_intr_alloc.h"
+#include "soc/dac_channel.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"
+#include "soc/sens_reg.h"
+#include "soc/rtc_io_reg.h"
+#include "soc/dac_channel.h"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/rom/ets_sys.h"
+#include "soc/sens_reg.h"
+#include "soc/rtc_io_reg.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/ets_sys.h"
+#else
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "rom/ets_sys.h"
+#include "esp_intr.h"
+#endif
 
 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 __analogWidth = ADC_WIDTH_MAX - 1; //3 for ESP32/ESP32C3; 4 for ESP32S2
+static uint8_t __analogReturnedWidth = SOC_ADC_MAX_BITWIDTH; //12 for ESP32/ESP32C3; 13 for ESP32S2
 static uint8_t __analogClockDiv = 1;
+static adc_attenuation_t __pin_attenuation[SOC_GPIO_PIN_COUNT];
 
-// Width of returned answer ()
-static uint8_t __analogReturnedWidth = 12;
+static inline uint16_t mapResolution(uint16_t value)
+{
+    uint8_t from = __analogWidth + 9;
+    if (from == __analogReturnedWidth) {
+        return value;
+    }
+    if (from > __analogReturnedWidth) {
+        return value >> (from  - __analogReturnedWidth);
+    }
+    return value << (__analogReturnedWidth - from);
+}
 
+void __analogSetClockDiv(uint8_t clockDiv){
+    if(!clockDiv){
+        clockDiv = 1;
+    }
+    __analogClockDiv = clockDiv;
+#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
+    adc_set_clk_div(__analogClockDiv);
+#endif
+}
+
+void __analogSetAttenuation(adc_attenuation_t attenuation)
+{
+    __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);
-    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);
+    adc1_config_width(__analogWidth);
 }
+#endif
 
-void __analogSetCycles(uint8_t cycles){
-    __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(){
+void __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
+    for(int i=0; i<SOC_GPIO_PIN_COUNT; i++){
+        __pin_attenuation[i] = ADC_ATTENDB_MAX;
+    }
 }
 
 void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
@@ -120,23 +117,27 @@ void __analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation)
     if(channel < 0 || attenuation > 3){
         return ;
     }
-    __analogInit();
-    if(channel > 7){
-        SET_PERI_REG_BITS(SENS_SAR_ATTEN2_REG, 3, attenuation, ((channel - 10) * 2));
+    if(channel > 9){
+        adc2_config_channel_atten(channel - 10, attenuation);
     } else {
-        SET_PERI_REG_BITS(SENS_SAR_ATTEN1_REG, 3, attenuation, (channel * 2));
+        adc1_config_channel_atten(channel, attenuation);
+    }
+    __analogInit();
+    if((__pin_attenuation[pin] != ADC_ATTENDB_MAX) || (attenuation != __analogAttenuation)){
+        __pin_attenuation[pin] = attenuation;
     }
 }
 
-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;
     }
-
+    __analogInit();
     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))
@@ -144,130 +145,156 @@ bool IRAM_ATTR __adcAttachPin(uint8_t pin){
                     | (1 << (pad + SENS_TOUCH_PAD_WORKEN_S)));
             WRITE_PERI_REG(SENS_SAR_TOUCH_ENABLE_REG, touch);
         }
-    } else if(pin == 25){
+#endif
+    }
+#if SOC_DAC_SUPPORTED
+    else if(pin == DAC_CHANNEL_1_GPIO_NUM){
         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){
+    } else if(pin == DAC_CHANNEL_2_GPIO_NUM){
         CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);//stop dac2
     }
+#endif
 
     pinMode(pin, ANALOG);
-
-    __analogInit();
+    __analogSetPinAttenuation(pin, (__pin_attenuation[pin] != ADC_ATTENDB_MAX)?__pin_attenuation[pin]:__analogAttenuation);
     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;
     }
+    __analogReturnedWidth = bits;
+#if CONFIG_IDF_TARGET_ESP32
     __analogSetWidth(bits);         // hadware from 9 to 12
-    __analogReturnedWidth = bits;   // software from 1 to 16
+#endif
 }
 
-int __hallRead()    //hall sensor without LNA
+uint16_t __analogRead(uint8_t pin)
 {
-    int Sens_Vp0;
-    int Sens_Vn0;
-    int Sens_Vp1;
-    int Sens_Vn1;
+    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 mapResolution(value);
+        } else if ( r == ESP_ERR_INVALID_STATE ) {
+            log_e("GPIO%u: %s: ADC2 not initialized yet.", pin, esp_err_to_name(r));
+        } else if ( r == ESP_ERR_TIMEOUT ) {
+            log_e("GPIO%u: %s: ADC2 is in use by Wi-Fi. Please see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html#adc-limitations for more info", pin, esp_err_to_name(r));
+        } else {
+            log_e("GPIO%u: %s", pin, esp_err_to_name(r));
+        }
+    } else {
+        value = adc1_get_raw(channel);
+        return mapResolution(value);
+    }
+    return mapResolution(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(adc_vref_to_gpio(ADC_UNIT_2, __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 using idf read
+{
     pinMode(36, ANALOG);
     pinMode(39, ANALOG);
-    SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE_M);     // hall sens force enable
-    SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_XPD_HALL);               // xpd hall
-    SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE_M);   // phase force
-    CLEAR_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE);           // hall phase
-    Sens_Vp0 = __analogRead(36);
-    Sens_Vn0 = __analogRead(39);
-    SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE);
-    Sens_Vp1 = __analogRead(36);
-    Sens_Vn1 = __analogRead(39);
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
-    CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE);
-    CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE);
-    return (Sens_Vp1 - Sens_Vp0) - (Sens_Vn1 - Sens_Vn0);
+    __analogSetWidth(12);
+    return hall_sensor_read();
 }
+#endif
 
 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")));
-extern uint16_t adcEnd(uint8_t pin) __attribute__ ((weak, alias("__adcEnd")));
+
+#if CONFIG_IDF_TARGET_ESP32
+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

@@ -30,7 +30,8 @@ typedef enum {
     ADC_0db,
     ADC_2_5db,
     ADC_6db,
-    ADC_11db
+    ADC_11db,
+    ADC_ATTENDB_MAX
 } adc_attenuation_t;
 
 /*
@@ -38,6 +39,11 @@ 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 +53,6 @@ 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 +72,30 @@ 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

@@ -18,11 +18,12 @@
 
 bool btInUse(){ return true; }
 
-#ifdef CONFIG_BLUEDROID_ENABLED
 #include "esp_bt.h"
 
-#ifdef CONFIG_CLASSIC_BT_ENABLED
+#ifdef CONFIG_BTDM_CONTROLLER_MODE_BTDM
 #define BT_MODE ESP_BT_MODE_BTDM
+#elif defined(CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY)
+#define BT_MODE ESP_BT_MODE_CLASSIC_BT
 #else
 #define BT_MODE ESP_BT_MODE_BLE
 #endif
@@ -65,13 +66,21 @@ 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");
     return false;
 }
 
-#else
+#else // CONFIG_BT_ENABLED
 bool btStarted()
 {
     return false;
@@ -86,6 +95,6 @@ bool btStop()
 {
     return false;
 }
-#endif
-#endif
+
+#endif // CONFIG_BT_ENABLED
 

cores/esp32/esp32-hal-cpu.c

@@ -0,0 +1,261 @@
+// 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 "sdkconfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "freertos/task.h"
+#include "esp_attr.h"
+#include "esp_log.h"
+#include "soc/rtc.h"
+#include "soc/rtc_cntl_reg.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 "freertos/xtensa_timer.h"
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "freertos/xtensa_timer.h"
+#include "esp32s2/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "freertos/xtensa_timer.h"
+#include "esp32s3/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/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;
+
+
+static apb_change_t * apb_change_callbacks = NULL;
+static xSemaphoreHandle apb_change_lock = NULL;
+
+static void initApbChangeCallback(){
+    static volatile bool initialized = false;
+    if(!initialized){
+        initialized = true;
+        apb_change_lock = xSemaphoreCreateMutex();
+        if(!apb_change_lock){
+            initialized = false;
+        }
+    }
+}
+
+static void triggerApbChangeCallback(apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
+    initApbChangeCallback();
+    xSemaphoreTake(apb_change_lock, portMAX_DELAY);
+    apb_change_t * r = apb_change_callbacks;
+    if( r != NULL ){
+        if(ev_type == APB_BEFORE_CHANGE )
+            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);
+}
+
+bool addApbChangeCallback(void * arg, apb_change_cb_t cb){
+    initApbChangeCallback();
+    apb_change_t * c = (apb_change_t*)malloc(sizeof(apb_change_t));
+    if(!c){
+        log_e("Callback Object Malloc Failed");
+        return false;
+    }
+    c->next = NULL;
+    c->prev = NULL;
+    c->arg = arg;
+    c->cb = cb;
+    xSemaphoreTake(apb_change_lock, portMAX_DELAY);
+    if(apb_change_callbacks == NULL){
+        apb_change_callbacks = c;
+    } else {
+        apb_change_t * r = apb_change_callbacks;
+        // look for duplicate callbacks
+        while( (r != NULL ) && !((r->cb == cb) && ( r->arg == arg))) r = r->next;
+        if (r) {
+            log_e("duplicate func=%08X arg=%08X",c->cb,c->arg);
+            free(c);
+            xSemaphoreGive(apb_change_lock);
+            return false;
+        }
+        else {
+            c->next = apb_change_callbacks;
+            apb_change_callbacks-> prev = c;
+            apb_change_callbacks = c;
+        }
+    }
+    xSemaphoreGive(apb_change_lock);
+    return true;
+}
+
+bool removeApbChangeCallback(void * arg, apb_change_cb_t cb){
+    initApbChangeCallback();
+    xSemaphoreTake(apb_change_lock, portMAX_DELAY);
+    apb_change_t * r = apb_change_callbacks;
+    // 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;
+        }
+    else {
+        // 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);
+    }
+    xSemaphoreGive(apb_change_lock);
+    return true;
+}
+
+static uint32_t calculateApb(rtc_cpu_freq_config_t * conf){
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+	return APB_CLK_FREQ;
+#else
+    if(conf->freq_mhz >= 80){
+        return 80 * MHZ;
+    }
+    return (conf->source_freq_mhz * MHZ) / conf->div;
+#endif
+}
+
+void esp_timer_impl_update_apb_freq(uint32_t apb_ticks_per_us); //private in IDF
+
+bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
+    rtc_cpu_freq_config_t conf, cconf;
+    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)){
+                log_e("Bad frequency: %u MHz! Options are: 240, 160, 80, %u and %u MHz", cpu_freq_mhz, xtal, xtal/2);
+                return false;
+            }
+        } else if(cpu_freq_mhz <= xtal && cpu_freq_mhz != xtal && cpu_freq_mhz != (xtal/2) && cpu_freq_mhz != (xtal/4)){
+            log_e("Bad frequency: %u MHz! Options are: 240, 160, 80, %u, %u and %u MHz", cpu_freq_mhz, xtal, xtal/2, xtal/4);
+            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);
+        } else {
+            log_e("Bad frequency: %u MHz! Options are: 240, 160, 80, %u and %u MHz", cpu_freq_mhz, xtal, xtal/2);
+        }
+        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
+    if(cconf.freq_mhz == cpu_freq_mhz){
+        return true;
+    }
+    //Get configuration for the new CPU frequency
+    if(!rtc_clk_cpu_freq_mhz_to_config(cpu_freq_mhz, &conf)){
+        log_e("CPU clock could not be set to %u MHz", cpu_freq_mhz);
+        return false;
+    }
+    //Current APB
+    capb = calculateApb(&cconf);
+    //New APB
+    apb = calculateApb(&conf);
+    log_d("%s: %u / %u = %u Mhz, APB: %u Hz", (conf.source == RTC_CPU_FREQ_SRC_PLL)?"PLL":((conf.source == RTC_CPU_FREQ_SRC_APLL)?"APLL":((conf.source == RTC_CPU_FREQ_SRC_XTAL)?"XTAL":"8M")), conf.source_freq_mhz, conf.div, conf.freq_mhz, apb);
+    //Call peripheral functions before the APB change
+    if(apb_change_callbacks){
+        triggerApbChangeCallback(APB_BEFORE_CHANGE, capb, apb);
+    }
+    //Make the frequency change
+    rtc_clk_cpu_freq_set_config_fast(&conf);
+    if(capb != apb){
+        //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
+        esp_timer_impl_update_apb_freq(apb / MHZ);
+    }
+    //Update FreeRTOS Tick Divisor
+#if CONFIG_IDF_TARGET_ESP32C3
+
+#elif CONFIG_IDF_TARGET_ESP32S3
+
+#else
+    uint32_t fcpu = (conf.freq_mhz >= 80)?(conf.freq_mhz * MHZ):(apb);
+    _xt_tick_divisor = fcpu / XT_TICK_PER_SEC;
+#endif
+    //Call peripheral functions after the APB change
+    if(apb_change_callbacks){
+        triggerApbChangeCallback(APB_AFTER_CHANGE, capb, apb);
+    }
+    return true;
+}
+
+uint32_t getCpuFrequencyMhz(){
+    rtc_cpu_freq_config_t conf;
+    rtc_clk_cpu_freq_get_config(&conf);
+    return conf.freq_mhz;
+}
+
+uint32_t getXtalFrequencyMhz(){
+    return rtc_clk_xtal_freq_get();
+}
+
+uint32_t getApbFrequency(){
+    rtc_cpu_freq_config_t conf;
+    rtc_clk_cpu_freq_get_config(&conf);
+    return calculateApb(&conf);
+}

cores/esp32/esp32-hal-cpu.h

@@ -0,0 +1,48 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef _ESP32_HAL_CPU_H_
+#define _ESP32_HAL_CPU_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+typedef enum { APB_BEFORE_CHANGE, APB_AFTER_CHANGE } apb_change_ev_t;
+
+typedef void (* apb_change_cb_t)(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb);
+
+bool addApbChangeCallback(void * arg, apb_change_cb_t cb);
+bool removeApbChangeCallback(void * arg, apb_change_cb_t cb);
+
+//function takes the following frequencies as valid values:
+//  240, 160, 80    <<< For all XTAL types
+//  40, 20, 10      <<< For 40MHz XTAL
+//  26, 13          <<< For 26MHz XTAL
+//  24, 12          <<< For 24MHz XTAL
+bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz);
+
+uint32_t getCpuFrequencyMhz();  // In MHz
+uint32_t getXtalFrequencyMhz(); // In MHz
+uint32_t getApbFrequency();     // In Hz
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ESP32_HAL_CPU_H_ */

cores/esp32/esp32-hal-dac.c

@@ -12,43 +12,38 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "esp32-hal-dac.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 "esp32-hal.h"
+#include "soc/soc_caps.h"
 
-void IRAM_ATTR __dacWrite(uint8_t pin, uint8_t value)
+#ifndef SOC_DAC_SUPPORTED           
+#define NODAC
+#else
+#include "soc/dac_channel.h"
+#include "driver/dac_common.h"
+
+void ARDUINO_ISR_ATTR __dacWrite(uint8_t pin, uint8_t value)
 {
-    if(pin < 25 || pin > 26){
+    if(pin < DAC_CHANNEL_1_GPIO_NUM || pin > DAC_CHANNEL_2_GPIO_NUM){
         return;//not dac pin
     }
-    pinMode(pin, ANALOG);
-    uint8_t channel = pin - 25;
 
+    uint8_t channel = pin - DAC_CHANNEL_1_GPIO_NUM;
+    dac_output_enable(channel);
+    dac_output_voltage(channel, value);
 
-    //Disable Tone
-    CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
+}
 
-    if (channel) {
-        //Disable Channel Tone
-        CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
-        //Set the Dac value
-        SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, value, RTC_IO_PDAC2_DAC_S);   //dac_output
-        //Channel output enable
-        SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
-    } else {
-        //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);
+void ARDUINO_ISR_ATTR __dacDisable(uint8_t pin)
+{
+    if(pin < DAC_CHANNEL_1_GPIO_NUM || pin > DAC_CHANNEL_2_GPIO_NUM){
+        return;//not dac pin
     }
+
+    uint8_t channel = pin - DAC_CHANNEL_1_GPIO_NUM;
+    dac_output_disable(channel);
 }
 
 extern void dacWrite(uint8_t pin, uint8_t value) __attribute__ ((weak, alias("__dacWrite")));
+extern void dacDisable(uint8_t pin) __attribute__ ((weak, alias("__dacDisable")));
+
+#endif

cores/esp32/esp32-hal-dac.h

@@ -28,6 +28,7 @@ extern "C" {
 #include "driver/gpio.h"
 
 void dacWrite(uint8_t pin, uint8_t value);
+void dacDisable(uint8_t pin);
 
 #ifdef __cplusplus
 }

cores/esp32/esp32-hal-gpio.c

@@ -13,263 +13,196 @@
 // limitations under the License.
 
 #include "esp32-hal-gpio.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"
+#include "hal/gpio_hal.h"
+#include "soc/soc_caps.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};
+// It fixes lack of pin definition for S3 and for any future SoC
+// this function works for ESP32, ESP32-S2 and ESP32-S3 - including the C3, it will return -1 for any pin
+#if SOC_TOUCH_SENSOR_NUM >  0
+#include "soc/touch_sensor_periph.h"
 
-const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[GPIO_PIN_COUNT]={
-    {0x44, 11, 11, 1},
-    {0x88, -1, -1, -1},
-    {0x40, 12, 12, 2},
-    {0x84, -1, -1, -1},
-    {0x48, 10, 10, 0},
-    {0x6c, -1, -1, -1},
-    {0x60, -1, -1, -1},
-    {0x64, -1, -1, -1},
-    {0x68, -1, -1, -1},
-    {0x54, -1, -1, -1},
-    {0x58, -1, -1, -1},
-    {0x5c, -1, -1, -1},
-    {0x34, 15, 15, 5},
-    {0x38, 14, 14, 4},
-    {0x30, 16, 16, 6},
-    {0x3c, 13, 13, 3},
-    {0x4c, -1, -1, -1},
-    {0x50, -1, -1, -1},
-    {0x70, -1, -1, -1},
-    {0x74, -1, -1, -1},
-    {0x78, -1, -1, -1},
-    {0x7c, -1, -1, -1},
-    {0x80, -1, -1, -1},
-    {0x8c, -1, -1, -1},
-    {0, -1, -1, -1},
-    {0x24, 6, 18, -1}, //DAC1
-    {0x28, 7, 19, -1}, //DAC2
-    {0x2c, 17, 17, 7},
-    {0, -1, -1, -1},
-    {0, -1, -1, -1},
-    {0, -1, -1, -1},
-    {0, -1, -1, -1},
-    {0x1c, 9, 4, 9},
-    {0x20, 8, 5, 8},
-    {0x14, 4, 6, -1},
-    {0x18, 5, 7, -1},
-    {0x04, 0, 0, -1},
-    {0x08, 1, 1, -1},
-    {0x0c, 2, 2, -1},
-    {0x10, 3, 3, -1}
-};
+int8_t digitalPinToTouchChannel(uint8_t pin) 
+{
+    int8_t ret = -1;
+    if (pin < SOC_GPIO_PIN_COUNT) {
+        for (uint8_t i = 0; i < SOC_TOUCH_SENSOR_NUM; i++) {
+            if (touch_sensor_channel_io_map[i] == pin) {
+                ret = i;
+                break;
+            }
+        }
+    }
+    return ret;
+}
+#else
+// No Touch Sensor available
+int8_t digitalPinToTouchChannel(uint8_t pin) 
+{
+    return -1;
+}
+#endif
+
+#ifdef SOC_ADC_SUPPORTED
+#include "soc/adc_periph.h"
+
+int8_t digitalPinToAnalogChannel(uint8_t pin) 
+{
+    uint8_t channel = 0;
+    if (pin < SOC_GPIO_PIN_COUNT) {
+        for (uint8_t i = 0; i < SOC_ADC_PERIPH_NUM; i++) {
+            for (uint8_t j = 0; j < SOC_ADC_MAX_CHANNEL_NUM; j++) {
+                if (adc_channel_io_map[i][j] == pin) {
+                    return channel;
+                }
+                channel++;
+            }
+        }
+    }
+    return -1;
+}
+
+int8_t analogChannelToDigitalPin(uint8_t channel) 
+{
+    if (channel >= (SOC_ADC_PERIPH_NUM * SOC_ADC_MAX_CHANNEL_NUM)) {
+        return -1;
+    }
+    uint8_t adc_unit = (channel / SOC_ADC_MAX_CHANNEL_NUM);
+    uint8_t adc_chan = (channel % SOC_ADC_MAX_CHANNEL_NUM);
+    return adc_channel_io_map[adc_unit][adc_chan];
+}
+#else
+// No Analog channels availible
+int8_t analogChannelToDigitalPin(uint8_t channel) 
+{
+    return -1;
+}
+#endif
 
 typedef void (*voidFuncPtr)(void);
 typedef void (*voidFuncPtrArg)(void*);
 typedef struct {
     voidFuncPtr fn;
     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)) {
+	if (!GPIO_IS_VALID_GPIO(pin)) {
+        log_e("Invalid pin selected");
+		return;
+	}
+	gpio_config_t conf = {
+		    .pin_bit_mask = (1ULL<<pin),			/*!< GPIO pin: set with bit mask, each bit maps to a GPIO */
+		    .mode = GPIO_MODE_DISABLE,              /*!< GPIO mode: set input/output mode                     */
+		    .pull_up_en = GPIO_PULLUP_DISABLE,      /*!< GPIO pull-up                                         */
+		    .pull_down_en = GPIO_PULLDOWN_DISABLE,  /*!< GPIO pull-down                                       */
+		    .intr_type = GPIO_INTR_DISABLE      	/*!< GPIO interrupt type                                  */
+	};
+	if (mode < 0x20) {//io
+		conf.mode = mode & (INPUT | OUTPUT);
+		if (mode & OPEN_DRAIN) {
+			conf.mode |= GPIO_MODE_DEF_OD;
+		}
+		if (mode & PULLUP) {
+			conf.pull_up_en = GPIO_PULLUP_ENABLE;
+		}
+		if (mode & PULLDOWN) {
+			conf.pull_down_en = GPIO_PULLDOWN_ENABLE;
+		}
+	}
+	if(gpio_config(&conf) != ESP_OK)
+    {
+        log_e("GPIO config failed");
         return;
     }
-
-    uint32_t rtc_reg = rtc_gpio_desc[pin].reg;
-    if(mode == ANALOG) {
-        if(!rtc_reg) {
-            return;//not rtc pin
-        }
-        //lock rtc
-        uint32_t reg_val = ESP_REG(rtc_reg);
-        if(reg_val & rtc_gpio_desc[pin].mux){
-            return;//already in adc mode
-        }
-        reg_val &= ~(
-                (RTC_IO_TOUCH_PAD1_FUN_SEL_V << rtc_gpio_desc[pin].func)
-                |rtc_gpio_desc[pin].ie
-                |rtc_gpio_desc[pin].pullup
-                |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_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);
-        } else if(mode & PULLDOWN) {
-            ESP_REG(rtc_reg) = (ESP_REG(rtc_reg) | rtc_gpio_desc[pin].pulldown) & ~(rtc_gpio_desc[pin].pullup);
-        } else {
-            ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
-        }
-        //unlock rtc
-    }
-
-    uint32_t pinFunction = 0, pinControl = 0;
-
-    //lock gpio
-    if(mode & INPUT) {
-        if(pin < 32) {
-            GPIO.enable_w1tc = ((uint32_t)1 << pin);
-        } else {
-            GPIO.enable1_w1tc.val = ((uint32_t)1 << (pin - 32));
-        }
-    } else if(mode & OUTPUT) {
-        if(pin > 33){
-            //unlock gpio
-            return;//pins above 33 can be only inputs
-        } else if(pin < 32) {
-            GPIO.enable_w1ts = ((uint32_t)1 << pin);
-        } else {
-            GPIO.enable1_w1ts.val = ((uint32_t)1 << (pin - 32));
-        }
-    }
-
-    if(mode & PULLUP) {
-        pinFunction |= FUN_PU;
-    } else if(mode & PULLDOWN) {
-        pinFunction |= FUN_PD;
-    }
-
-    pinFunction |= ((uint32_t)2 << FUN_DRV_S);//what are the drivers?
-    pinFunction |= FUN_IE;//input enable but required for output as well?
-
-    if(mode & (INPUT | OUTPUT)) {
-        pinFunction |= ((uint32_t)2 << MCU_SEL_S);
-    } else if(mode == SPECIAL) {
-        pinFunction |= ((uint32_t)(((pin)==1||(pin)==3)?0:1) << MCU_SEL_S);
-    } else {
-        pinFunction |= ((uint32_t)(mode >> 5) << MCU_SEL_S);
-    }
-
-    ESP_REG(DR_REG_IO_MUX_BASE + esp32_gpioMux[pin].reg) = pinFunction;
-
-    if(mode & OPEN_DRAIN) {
-        pinControl = (1 << GPIO_PIN0_PAD_DRIVER_S);
-    }
-
-    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) {
-            GPIO.out1_w1ts.val = ((uint32_t)1 << (pin - 32));
-        }
-    } else {
-        if(pin < 32) {
-            GPIO.out_w1tc = ((uint32_t)1 << pin);
-        } else if(pin < 34) {
-            GPIO.out1_w1tc.val = ((uint32_t)1 << (pin - 32));
+	gpio_set_level((gpio_num_t)pin, val);
+}
+
+extern int ARDUINO_ISR_ATTR __digitalRead(uint8_t pin)
+{
+	return gpio_get_level((gpio_num_t)pin);
+}
+
+static void ARDUINO_ISR_ATTR __onPinInterrupt(void * arg) {
+	InterruptHandle_t * isr = (InterruptHandle_t*)arg;
+    if(isr->fn) {
+        if(isr->arg){
+            ((voidFuncPtrArg)isr->fn)(isr->arg);
+        } else {
+        	isr->fn();
         }
     }
 }
 
-extern int IRAM_ATTR __digitalRead(uint8_t pin)
+extern void cleanupFunctional(void* arg);
+
+extern void __attachInterruptFunctionalArg(uint8_t pin, voidFuncPtrArg userFunc, void * arg, int intr_type, bool functional)
 {
-    if(pin < 32) {
-        return (GPIO.in >> pin) & 0x1;
-    } else if(pin < 40) {
-        return (GPIO.in1.val >> (pin - 32)) & 0x1;
+    static bool interrupt_initialized = false;
+
+    if(!interrupt_initialized) {
+    	esp_err_t err = gpio_install_isr_service((int)ARDUINO_ISR_FLAG);
+    	interrupt_initialized = (err == ESP_OK) || (err == ESP_ERR_INVALID_STATE);
     }
-    return 0;
-}
-
-static intr_handle_t gpio_intr_handle = NULL;
-
-static void IRAM_ATTR __onPinInterrupt()
-{
-    uint32_t gpio_intr_status_l=0;
-    uint32_t gpio_intr_status_h=0;
-
-    gpio_intr_status_l = GPIO.status;
-    gpio_intr_status_h = GPIO.status1.val;
-    GPIO.status_w1tc = gpio_intr_status_l;//Clear intr for gpio0-gpio31
-    GPIO.status1_w1tc.val = gpio_intr_status_h;//Clear intr for gpio32-39
-
-    uint8_t pin=0;
-    if(gpio_intr_status_l) {
-        do {
-            if(gpio_intr_status_l & ((uint32_t)1 << pin)) {
-                if(__pinInterruptHandlers[pin].fn) {
-                    if(__pinInterruptHandlers[pin].arg){
-                        ((voidFuncPtrArg)__pinInterruptHandlers[pin].fn)(__pinInterruptHandlers[pin].arg);
-                    } else {
-                        __pinInterruptHandlers[pin].fn();
-                    }
-                }
-            }
-        } while(++pin<32);
+    if(!interrupt_initialized) {
+    	log_e("GPIO ISR Service Failed To Start");
+    	return;
     }
-    if(gpio_intr_status_h) {
-        pin=32;
-        do {
-            if(gpio_intr_status_h & ((uint32_t)1 << (pin - 32))) {
-                if(__pinInterruptHandlers[pin].fn) {
-                    if(__pinInterruptHandlers[pin].arg){
-                        ((voidFuncPtrArg)__pinInterruptHandlers[pin].fn)(__pinInterruptHandlers[pin].arg);
-                    } else {
-                        __pinInterruptHandlers[pin].fn();
-                    }
-                }
-            }
-        } while(++pin<GPIO_PIN_COUNT);
+
+    // if new attach without detach remove old info
+    if (__pinInterruptHandlers[pin].functional && __pinInterruptHandlers[pin].arg)
+    {
+    	cleanupFunctional(__pinInterruptHandlers[pin].arg);
     }
+    __pinInterruptHandlers[pin].fn = (voidFuncPtr)userFunc;
+    __pinInterruptHandlers[pin].arg = arg;
+    __pinInterruptHandlers[pin].functional = functional;
+
+    gpio_set_intr_type((gpio_num_t)pin, (gpio_int_type_t)(intr_type & 0x7));
+    if(intr_type & 0x8){
+    	gpio_wakeup_enable((gpio_num_t)pin, (gpio_int_type_t)(intr_type & 0x7));
+    }
+    gpio_isr_handler_add((gpio_num_t)pin, __onPinInterrupt, &__pinInterruptHandlers[pin]);
+
+
+    //FIX interrupts on peripherals outputs (eg. LEDC,...)
+    //Enable input in GPIO register
+    gpio_hal_context_t gpiohal;
+    gpiohal.dev = GPIO_LL_GET_HW(GPIO_PORT_0);
+    gpio_hal_input_enable(&gpiohal, pin);
 }
 
 extern void __attachInterruptArg(uint8_t pin, voidFuncPtrArg userFunc, void * arg, int intr_type)
 {
-    static bool interrupt_initialized = false;
-    
-    if(!interrupt_initialized) {
-        interrupt_initialized = true;
-        esp_intr_alloc(ETS_GPIO_INTR_SOURCE, (int)ESP_INTR_FLAG_IRAM, __onPinInterrupt, NULL, &gpio_intr_handle);
-    }
-    __pinInterruptHandlers[pin].fn = (voidFuncPtr)userFunc;
-    __pinInterruptHandlers[pin].arg = arg;
-    esp_intr_disable(gpio_intr_handle);
-    if(esp_intr_get_cpu(gpio_intr_handle)) { //APP_CPU
-        GPIO.pin[pin].int_ena = 1;
-    } else { //PRO_CPU
-        GPIO.pin[pin].int_ena = 4;
-    }
-    GPIO.pin[pin].int_type = intr_type;
-    esp_intr_enable(gpio_intr_handle);
+	__attachInterruptFunctionalArg(pin, userFunc, arg, intr_type, false);
 }
 
 extern void __attachInterrupt(uint8_t pin, voidFuncPtr userFunc, int intr_type) {
-    __attachInterruptArg(pin, (voidFuncPtrArg)userFunc, NULL, intr_type);
+    __attachInterruptFunctionalArg(pin, (voidFuncPtrArg)userFunc, NULL, intr_type, false);
 }
 
 extern void __detachInterrupt(uint8_t pin)
 {
-    esp_intr_disable(gpio_intr_handle);
+	gpio_isr_handler_remove((gpio_num_t)pin); //remove handle and disable isr for pin
+	gpio_wakeup_disable((gpio_num_t)pin);
+
+    if (__pinInterruptHandlers[pin].functional && __pinInterruptHandlers[pin].arg)
+    {
+    	cleanupFunctional(__pinInterruptHandlers[pin].arg);
+    }
     __pinInterruptHandlers[pin].fn = NULL;
     __pinInterruptHandlers[pin].arg = NULL;
-    GPIO.pin[pin].int_ena = 0;
-    GPIO.pin[pin].int_type = 0;
-    esp_intr_enable(gpio_intr_handle);
+    __pinInterruptHandlers[pin].functional = false;
+
+    gpio_set_intr_type((gpio_num_t)pin, GPIO_INTR_DISABLE);
 }
 
 
@@ -277,6 +210,5 @@ extern void pinMode(uint8_t pin, uint8_t mode) __attribute__ ((weak, alias("__pi
 extern void digitalWrite(uint8_t pin, uint8_t val) __attribute__ ((weak, alias("__digitalWrite")));
 extern int digitalRead(uint8_t pin) __attribute__ ((weak, alias("__digitalRead")));
 extern void attachInterrupt(uint8_t pin, voidFuncPtr handler, int mode) __attribute__ ((weak, alias("__attachInterrupt")));
-extern void attachInterruptArg(uint8_t pin, voidFuncPtr handler, void * arg, int mode) __attribute__ ((weak, alias("__attachInterruptArg")));
+extern void attachInterruptArg(uint8_t pin, voidFuncPtrArg handler, void * arg, int mode) __attribute__ ((weak, alias("__attachInterruptArg")));
 extern void detachInterrupt(uint8_t pin) __attribute__ ((weak, alias("__detachInterrupt")));
-

cores/esp32/esp32-hal-gpio.h

@@ -25,26 +25,32 @@ 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  46
+#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
 
 //GPIO FUNCTIONS
 #define INPUT             0x01
-#define OUTPUT            0x02
+// Changed OUTPUT from 0x02 to behave the same as Arduino pinMode(pin,OUTPUT) 
+// where you can read the state of pin even when it is set as OUTPUT
+#define OUTPUT            0x03 
 #define PULLUP            0x04
 #define INPUT_PULLUP      0x05
 #define PULLDOWN          0x08
 #define INPUT_PULLDOWN    0x09
 #define OPEN_DRAIN        0x10
 #define OUTPUT_OPEN_DRAIN 0x12
-#define SPECIAL           0xF0
-#define FUNCTION_1        0x00
-#define FUNCTION_2        0x20
-#define FUNCTION_3        0x40
-#define FUNCTION_4        0x60
-#define FUNCTION_5        0x80
-#define FUNCTION_6        0xA0
 #define ANALOG            0xC0
 
 //Interrupt Modes
@@ -57,31 +63,24 @@ extern "C" {
 #define ONLOW_WE  0x0C
 #define ONHIGH_WE 0x0D
 
-typedef struct {
-    uint8_t reg;      /*!< GPIO register offset from DR_REG_IO_MUX_BASE */
-    int8_t rtc;       /*!< RTC GPIO number (-1 if not RTC GPIO pin) */
-    int8_t adc;       /*!< ADC Channel number (-1 if not ADC pin) */
-    int8_t touch;     /*!< Touch Channel number (-1 if not Touch pin) */
-} esp32_gpioMux_t;
+#define digitalPinIsValid(pin)          GPIO_IS_VALID_GPIO(pin)
+#define digitalPinCanOutput(pin)        GPIO_IS_VALID_OUTPUT_GPIO(pin)
 
-extern const esp32_gpioMux_t esp32_gpioMux[40];
-extern const int8_t esp32_adc2gpio[20];
-
-#define digitalPinIsValid(pin)          ((pin) < 40 && esp32_gpioMux[(pin)].reg)
-#define digitalPinCanOutput(pin)        ((pin) < 34 && esp32_gpioMux[(pin)].reg)
-#define digitalPinToRtcPin(pin)         (((pin) < 40)?esp32_gpioMux[(pin)].rtc:-1)
-#define digitalPinToAnalogChannel(pin)  (((pin) < 40)?esp32_gpioMux[(pin)].adc:-1)
-#define digitalPinToTouchChannel(pin)   (((pin) < 40)?esp32_gpioMux[(pin)].touch:-1)
-#define digitalPinToDacChannel(pin)     (((pin) == 25)?0:((pin) == 26)?1:-1)
+#define digitalPinToRtcPin(pin)         ((RTC_GPIO_IS_VALID_GPIO(pin))?rtc_io_number_get(pin):-1) 
+#define digitalPinToDacChannel(pin)     (((pin) == DAC_CHANNEL_1_GPIO_NUM)?0:((pin) == DAC_CHANNEL_2_GPIO_NUM)?1:-1)
 
 void pinMode(uint8_t pin, uint8_t mode);
 void digitalWrite(uint8_t pin, uint8_t val);
 int digitalRead(uint8_t pin);
 
 void attachInterrupt(uint8_t pin, void (*)(void), int mode);
-void attachInterruptArg(uint8_t pin, void (*)(void), void * arg, int mode);
+void attachInterruptArg(uint8_t pin, void (*)(void*), void * arg, int mode);
 void detachInterrupt(uint8_t pin);
 
+int8_t digitalPinToTouchChannel(uint8_t pin);
+int8_t digitalPinToAnalogChannel(uint8_t pin);
+int8_t analogChannelToDigitalPin(uint8_t channel);
+
 #ifdef __cplusplus
 }
 #endif

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

@@ -0,0 +1,854 @@
+// Copyright 2015-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <string.h>
+#include <math.h>
+
+#include "sdkconfig.h"
+#include "esp_attr.h"
+#include "rom/gpio.h"
+#include "soc/gpio_sig_map.h"
+#include "hal/gpio_types.h"
+#include "driver/gpio.h"
+#include "esp_err.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "freertos/semphr.h"
+#include "freertos/ringbuf.h"
+
+#include "esp_intr_alloc.h"
+#include "driver/periph_ctrl.h"
+#include "soc/i2c_reg.h"
+#include "soc/i2c_struct.h"
+#include "hal/i2c_ll.h"
+#include "esp32-hal-log.h"
+#include "esp32-hal-i2c-slave.h"
+
+#define I2C_SLAVE_USE_RX_QUEUE 0 // 1: Queue, 0: RingBuffer
+
+#if SOC_I2C_NUM > 1
+#define I2C_SCL_IDX(p)  ((p==0)?I2CEXT0_SCL_OUT_IDX:((p==1)?I2CEXT1_SCL_OUT_IDX:0))
+#define I2C_SDA_IDX(p) ((p==0)?I2CEXT0_SDA_OUT_IDX:((p==1)?I2CEXT1_SDA_OUT_IDX:0))
+#else
+#define I2C_SCL_IDX(p)  I2CEXT0_SCL_OUT_IDX
+#define I2C_SDA_IDX(p) I2CEXT0_SDA_OUT_IDX
+#endif
+
+#if CONFIG_IDF_TARGET_ESP32
+    #define I2C_TXFIFO_WM_INT_ENA    I2C_TXFIFO_EMPTY_INT_ENA
+    #define I2C_RXFIFO_WM_INT_ENA     I2C_RXFIFO_FULL_INT_ENA
+#endif
+
+enum {
+    I2C_SLAVE_EVT_RX, I2C_SLAVE_EVT_TX
+};
+
+typedef struct i2c_slave_struct_t {
+    i2c_dev_t * dev;
+    uint8_t num;
+    int8_t sda;
+    int8_t scl;
+    i2c_slave_request_cb_t request_callback;
+    i2c_slave_receive_cb_t receive_callback;
+    void * arg;
+    intr_handle_t intr_handle;
+    TaskHandle_t task_handle;
+    xQueueHandle event_queue;
+#if I2C_SLAVE_USE_RX_QUEUE
+    xQueueHandle rx_queue;
+#else
+    RingbufHandle_t rx_ring_buf;
+#endif
+    xQueueHandle tx_queue;
+    uint32_t rx_data_count;
+#if !CONFIG_DISABLE_HAL_LOCKS
+    xSemaphoreHandle lock;
+#endif
+} i2c_slave_struct_t;
+
+typedef union {
+    struct {
+        uint32_t event : 2;
+        uint32_t stop : 1;
+        uint32_t param : 29;
+    };
+    uint32_t val;
+} i2c_slave_queue_event_t;
+
+static i2c_slave_struct_t _i2c_bus_array[SOC_I2C_NUM] = {
+    { &I2C0, 0, -1, -1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0
+#if !CONFIG_DISABLE_HAL_LOCKS
+    , NULL
+#endif
+    },
+#if SOC_I2C_NUM > 1
+    { &I2C1, 1, -1, -1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0
+#if !CONFIG_DISABLE_HAL_LOCKS
+    , NULL
+#endif
+    }
+#endif
+};
+
+#if CONFIG_DISABLE_HAL_LOCKS
+#define I2C_SLAVE_MUTEX_LOCK()
+#define I2C_SLAVE_MUTEX_UNLOCK()
+#else
+#define I2C_SLAVE_MUTEX_LOCK()    if(i2c->lock){xSemaphoreTake(i2c->lock, portMAX_DELAY);}
+#define I2C_SLAVE_MUTEX_UNLOCK()  if(i2c->lock){xSemaphoreGive(i2c->lock);}
+#endif
+
+//-------------------------------------- HAL_LL (Missing Functions) ------------------------------------------------
+typedef enum {
+    I2C_STRETCH_CAUSE_MASTER_READ,
+    I2C_STRETCH_CAUSE_TX_FIFO_EMPTY,
+    I2C_STRETCH_CAUSE_RX_FIFO_FULL,
+    I2C_STRETCH_CAUSE_MAX
+} i2c_stretch_cause_t;
+
+static inline i2c_stretch_cause_t i2c_ll_stretch_cause(i2c_dev_t *hw)
+{
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+    return hw->sr.stretch_cause;
+#elif CONFIG_IDF_TARGET_ESP32S2
+    return hw->status_reg.stretch_cause;
+#else
+    return I2C_STRETCH_CAUSE_MAX;
+#endif
+}
+
+static inline void i2c_ll_set_stretch(i2c_dev_t *hw, uint16_t time)
+{
+#ifndef CONFIG_IDF_TARGET_ESP32
+    typeof(hw->scl_stretch_conf) scl_stretch_conf;
+    scl_stretch_conf.val = 0;
+    scl_stretch_conf.slave_scl_stretch_en = (time > 0);
+    scl_stretch_conf.stretch_protect_num = time;
+    scl_stretch_conf.slave_scl_stretch_clr = 1;
+    hw->scl_stretch_conf.val = scl_stretch_conf.val;
+    if(time > 0){
+        //enable interrupt
+        hw->int_ena.val |= I2C_SLAVE_STRETCH_INT_ENA;
+    } else {
+        //disable interrupt
+        hw->int_ena.val &= (~I2C_SLAVE_STRETCH_INT_ENA);
+    }
+#endif
+}
+
+static inline void i2c_ll_stretch_clr(i2c_dev_t *hw)
+{
+#ifndef CONFIG_IDF_TARGET_ESP32
+    hw->scl_stretch_conf.slave_scl_stretch_clr = 1;
+#endif
+}
+
+static inline bool i2c_ll_slave_addressed(i2c_dev_t *hw)
+{
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+    return hw->sr.slave_addressed;
+#else
+    return hw->status_reg.slave_addressed;
+#endif
+}
+
+static inline bool i2c_ll_slave_rw(i2c_dev_t *hw)//not exposed by hal_ll
+{
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+    return hw->sr.slave_rw;
+#else
+    return hw->status_reg.slave_rw;
+#endif
+}
+
+//-------------------------------------- PRIVATE (Function Prototypes) ------------------------------------------------
+static void i2c_slave_free_resources(i2c_slave_struct_t * i2c);
+static void i2c_slave_delay_us(uint64_t us);
+static void i2c_slave_gpio_mode(int8_t pin, gpio_mode_t mode);
+static bool i2c_slave_check_line_state(int8_t sda, int8_t scl);
+static bool i2c_slave_attach_gpio(i2c_slave_struct_t * i2c, int8_t sda, int8_t scl);
+static bool i2c_slave_detach_gpio(i2c_slave_struct_t * i2c);
+static bool i2c_slave_set_frequency(i2c_slave_struct_t * i2c, uint32_t clk_speed);
+static bool i2c_slave_send_event(i2c_slave_struct_t * i2c, i2c_slave_queue_event_t* event);
+static bool i2c_slave_handle_tx_fifo_empty(i2c_slave_struct_t * i2c);
+static bool i2c_slave_handle_rx_fifo_full(i2c_slave_struct_t * i2c, uint32_t len);
+static size_t i2c_slave_read_rx(i2c_slave_struct_t * i2c, uint8_t * data, size_t len);
+static void i2c_slave_isr_handler(void* arg);
+static void i2c_slave_task(void *pv_args);
+
+
+//=====================================================================================================================
+//-------------------------------------- Public Functions -------------------------------------------------------------
+//=====================================================================================================================
+
+esp_err_t i2cSlaveAttachCallbacks(uint8_t num, i2c_slave_request_cb_t request_callback, i2c_slave_receive_cb_t receive_callback, void * arg){
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c->request_callback = request_callback;
+    i2c->receive_callback = receive_callback;
+    i2c->arg = arg;
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ESP_OK;
+}
+
+esp_err_t i2cSlaveInit(uint8_t num, int sda, int scl, uint16_t slaveID, uint32_t frequency, size_t rx_len, size_t tx_len) {
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    if (sda < 0 || scl < 0) {
+        log_e("invalid pins sda=%d, scl=%d", sda, scl);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    if(!frequency){
+        frequency = 100000;
+    } else if(frequency > 1000000){
+        frequency = 1000000;
+    }
+
+    log_i("Initialising I2C Slave: sda=%d scl=%d freq=%d, addr=0x%x", sda, scl, frequency, slaveID);
+
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+    esp_err_t ret = ESP_OK;
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(!i2c->lock){
+        i2c->lock = xSemaphoreCreateMutex();
+        if (i2c->lock == NULL) {
+            log_e("RX queue create failed");
+            return ESP_ERR_NO_MEM;
+        }
+    }
+#endif
+
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c_slave_free_resources(i2c);
+
+#if I2C_SLAVE_USE_RX_QUEUE
+    i2c->rx_queue = xQueueCreate(rx_len, sizeof(uint8_t));
+    if (i2c->rx_queue == NULL) {
+        log_e("RX queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+#else
+    i2c->rx_ring_buf = xRingbufferCreate(rx_len, RINGBUF_TYPE_BYTEBUF);
+    if (i2c->rx_ring_buf == NULL) {
+        log_e("RX RingBuf create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+#endif
+
+    i2c->tx_queue = xQueueCreate(tx_len, sizeof(uint8_t));
+    if (i2c->tx_queue == NULL) {
+        log_e("TX queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    i2c->event_queue = xQueueCreate(16, sizeof(i2c_slave_queue_event_t));
+    if (i2c->event_queue == NULL) {
+        log_e("Event queue create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    xTaskCreate(i2c_slave_task, "i2c_slave_task", 4096, i2c, 20, &i2c->task_handle);
+    if(i2c->task_handle == NULL){
+        log_e("Event thread create failed");
+        ret = ESP_ERR_NO_MEM;
+        goto fail;
+    }
+
+    if (frequency == 0) {
+        frequency = 100000L;
+    }
+    frequency = (frequency * 5) / 4;
+
+    if (i2c->num == 0) {
+        periph_module_enable(PERIPH_I2C0_MODULE);
+#if SOC_I2C_NUM > 1
+    } else {
+        periph_module_enable(PERIPH_I2C1_MODULE);
+#endif
+    }
+    
+    i2c_ll_slave_init(i2c->dev);
+    i2c_ll_set_fifo_mode(i2c->dev, true);
+    i2c_ll_set_slave_addr(i2c->dev, slaveID, false);
+    i2c_ll_set_tout(i2c->dev, I2C_LL_MAX_TIMEOUT);
+    i2c_slave_set_frequency(i2c, frequency);
+
+    if (!i2c_slave_check_line_state(sda, scl)) {
+        log_e("bad pin state");
+        ret = ESP_FAIL;
+        goto fail;
+    }
+
+    i2c_slave_attach_gpio(i2c, sda, scl);
+
+    if (i2c_ll_is_bus_busy(i2c->dev)) {
+        log_w("Bus busy, reinit");
+        ret = ESP_FAIL;
+        goto fail;
+    }
+
+    i2c_ll_disable_intr_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_clr_intsts_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_set_fifo_mode(i2c->dev, true);
+
+    if (!i2c->intr_handle) {
+        uint32_t flags = ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_SHARED;
+        if(i2c->num == 0) {
+            ret = esp_intr_alloc(ETS_I2C_EXT0_INTR_SOURCE, flags, &i2c_slave_isr_handler, i2c, &i2c->intr_handle);
+#if SOC_I2C_NUM > 1
+        } else {
+            ret = esp_intr_alloc(ETS_I2C_EXT1_INTR_SOURCE, flags, &i2c_slave_isr_handler, i2c, &i2c->intr_handle);
+#endif
+        }
+
+        if (ret != ESP_OK) {
+            log_e("install interrupt handler Failed=%d", ret);
+            goto fail;
+        }
+    }
+    
+    i2c_ll_txfifo_rst(i2c->dev);
+    i2c_ll_rxfifo_rst(i2c->dev);
+    i2c_ll_slave_enable_rx_it(i2c->dev);
+    i2c_ll_set_stretch(i2c->dev, 0x3FF);
+    i2c_ll_update(i2c->dev);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ret;
+
+fail:
+    i2c_slave_free_resources(i2c);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ret;
+}
+
+esp_err_t i2cSlaveDeinit(uint8_t num){
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(!i2c->lock){
+        log_e("Lock is not initialized! Did you call i2c_slave_init()?");
+        return ESP_ERR_NO_MEM;
+    }
+#endif
+    I2C_SLAVE_MUTEX_LOCK();
+    i2c_slave_free_resources(i2c);
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return ESP_OK;
+}
+
+size_t i2cSlaveWrite(uint8_t num, const uint8_t *buf, uint32_t len, uint32_t timeout_ms) {
+    if(num >= SOC_I2C_NUM){
+        log_e("Invalid port num: %u", num);
+        return 0;
+    }
+    size_t to_queue = 0, to_fifo = 0;
+    i2c_slave_struct_t * i2c = &_i2c_bus_array[num];
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(!i2c->lock){
+        log_e("Lock is not initialized! Did you call i2c_slave_init()?");
+        return ESP_ERR_NO_MEM;
+    }
+#endif
+    if(!i2c->tx_queue){
+        return 0;
+    }
+    I2C_SLAVE_MUTEX_LOCK();
+#if CONFIG_IDF_TARGET_ESP32
+    //make sure that tx is idle
+    uint64_t tout_at = esp_timer_get_time() + (timeout_ms * 1000);
+    while(i2c_ll_slave_addressed(i2c->dev) && i2c_ll_slave_rw(i2c->dev)) {
+        // ongoing MASTER READ
+        //wait up to timeout_ms for current transaction to finish
+        vTaskDelay(2);
+        if((uint64_t)esp_timer_get_time() >= tout_at){
+            log_e("TX IDLE WAIT TIMEOUT!");
+            I2C_SLAVE_MUTEX_UNLOCK();
+            return 0;
+        }
+    }
+    i2c_ll_slave_disable_tx_it(i2c->dev);
+    if (i2c_ll_get_txfifo_len(i2c->dev) < SOC_I2C_FIFO_LEN) {
+        i2c_ll_txfifo_rst(i2c->dev);
+    }
+#endif
+    to_fifo = i2c_ll_get_txfifo_len(i2c->dev);
+    if(len < to_fifo){
+        to_fifo = len;
+    }
+    i2c_ll_write_txfifo(i2c->dev, (uint8_t*)buf, to_fifo);
+    buf += to_fifo;
+    len -= to_fifo;
+    //reset tx_queue
+    xQueueReset(i2c->tx_queue);
+    //write the rest of the bytes to the queue
+    if(len){
+        to_queue = uxQueueSpacesAvailable(i2c->tx_queue);
+        if(len < to_queue){
+            to_queue = len;
+        }
+        for (size_t i = 0; i < to_queue; i++) {
+            if (xQueueSend(i2c->tx_queue, &buf[i], timeout_ms / portTICK_RATE_MS) != pdTRUE) {
+                xQueueReset(i2c->tx_queue);
+                to_queue = 0;
+                break;
+            }
+        }
+        //no need to enable TX_EMPTY if tx_queue is empty
+        if(to_queue){
+            i2c_ll_slave_enable_tx_it(i2c->dev);
+        }
+    }
+    I2C_SLAVE_MUTEX_UNLOCK();
+    return to_queue + to_fifo;
+}
+
+//=====================================================================================================================
+//-------------------------------------- Private Functions ------------------------------------------------------------
+//=====================================================================================================================
+
+static void i2c_slave_free_resources(i2c_slave_struct_t * i2c){
+    i2c_slave_detach_gpio(i2c);
+    i2c_ll_set_slave_addr(i2c->dev, 0, false);
+    i2c_ll_disable_intr_mask(i2c->dev, I2C_LL_INTR_MASK);
+    i2c_ll_clr_intsts_mask(i2c->dev, I2C_LL_INTR_MASK);
+
+    if (i2c->intr_handle) {
+        esp_intr_free(i2c->intr_handle);
+        i2c->intr_handle = NULL;
+    }
+
+    if(i2c->task_handle){
+        vTaskDelete(i2c->task_handle);
+        i2c->task_handle = NULL;
+    }
+
+#if I2C_SLAVE_USE_RX_QUEUE
+    if (i2c->rx_queue) {
+        vQueueDelete(i2c->rx_queue);
+        i2c->rx_queue = NULL;
+    }
+#else
+    if (i2c->rx_ring_buf) {
+        vRingbufferDelete(i2c->rx_ring_buf);
+        i2c->rx_ring_buf = NULL;
+    }
+#endif
+
+    if (i2c->tx_queue) {
+        vQueueDelete(i2c->tx_queue);
+        i2c->tx_queue = NULL;
+    }
+
+    if (i2c->event_queue) {
+        vQueueDelete(i2c->event_queue);
+        i2c->event_queue = NULL;
+    }
+
+    i2c->rx_data_count = 0;
+}
+
+static bool i2c_slave_set_frequency(i2c_slave_struct_t * i2c, uint32_t clk_speed)
+{
+    if (i2c == NULL) {
+        log_e("no control buffer");
+        return false;
+    }
+    if(clk_speed > 1100000UL){
+        clk_speed = 1100000UL;
+    }
+
+    // Adjust Fifo thresholds based on frequency
+    uint32_t a = (clk_speed / 50000L) + 2;
+    log_d("Fifo thresholds: rx_fifo_full = %d, tx_fifo_empty = %d", SOC_I2C_FIFO_LEN - a, a);
+
+    i2c_clk_cal_t clk_cal;
+#if SOC_I2C_SUPPORT_APB
+    i2c_ll_cal_bus_clk(APB_CLK_FREQ, clk_speed, &clk_cal);
+    i2c_ll_set_source_clk(i2c->dev, I2C_SCLK_APB);            /*!< I2C source clock from APB, 80M*/
+#elif SOC_I2C_SUPPORT_XTAL
+    i2c_ll_cal_bus_clk(XTAL_CLK_FREQ, clk_speed, &clk_cal);
+    i2c_ll_set_source_clk(i2c->dev, I2C_SCLK_XTAL);           /*!< I2C source clock from XTAL, 40M */
+#endif
+    i2c_ll_set_txfifo_empty_thr(i2c->dev, a);
+    i2c_ll_set_rxfifo_full_thr(i2c->dev, SOC_I2C_FIFO_LEN - a);
+    i2c_ll_set_bus_timing(i2c->dev, &clk_cal);
+    i2c_ll_set_filter(i2c->dev, 3);
+    return true;
+}
+
+static void i2c_slave_delay_us(uint64_t us)
+{
+    uint64_t m = esp_timer_get_time();
+    if (us) {
+        uint64_t e = (m + us);
+        if (m > e) { //overflow
+            while ((uint64_t)esp_timer_get_time() > e);
+        }
+        while ((uint64_t)esp_timer_get_time() < e);
+    }
+}
+
+static void i2c_slave_gpio_mode(int8_t pin, gpio_mode_t mode)
+{
+    gpio_config_t conf = {
+        .pin_bit_mask = 1LL << pin,
+        .mode = mode,
+        .pull_up_en = GPIO_PULLUP_ENABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE
+    };
+    gpio_config(&conf);
+}
+
+static bool i2c_slave_check_line_state(int8_t sda, int8_t scl)
+{
+    if (sda < 0 || scl < 0) {
+        return false;//return false since there is nothing to do
+    }
+    // if the bus is not 'clear' try the cycling SCL until SDA goes High or 9 cycles
+    gpio_set_level(sda, 1);
+    gpio_set_level(scl, 1);
+    i2c_slave_gpio_mode(sda, GPIO_MODE_INPUT | GPIO_MODE_DEF_OD);
+    i2c_slave_gpio_mode(scl, GPIO_MODE_INPUT | GPIO_MODE_DEF_OD);
+    gpio_set_level(scl, 1);
+
+    if (!gpio_get_level(sda) || !gpio_get_level(scl)) { // bus in busy state
+        log_w("invalid state sda(%d)=%d, scl(%d)=%d", sda, gpio_get_level(sda), scl, gpio_get_level(scl));
+        for (uint8_t a=0; a<9; a++) {
+            i2c_slave_delay_us(5);
+            if (gpio_get_level(sda) && gpio_get_level(scl)) { // bus recovered
+                log_w("Recovered after %d Cycles",a);
+                gpio_set_level(sda,0); // start
+                i2c_slave_delay_us(5);
+                for (uint8_t a=0;a<9; a++) {
+                    gpio_set_level(scl,1);
+                    i2c_slave_delay_us(5);
+                    gpio_set_level(scl,0);
+                    i2c_slave_delay_us(5);
+                }
+                gpio_set_level(scl,1);
+                i2c_slave_delay_us(5);
+                gpio_set_level(sda,1); // stop
+                break;
+            }
+            gpio_set_level(scl, 0);
+            i2c_slave_delay_us(5);
+            gpio_set_level(scl, 1);
+        }
+    }
+
+    if (!gpio_get_level(sda) || !gpio_get_level(scl)) { // bus in busy state
+        log_e("Bus Invalid State, Can't init sda=%d, scl=%d",gpio_get_level(sda),gpio_get_level(scl));
+        return false; // bus is busy
+    }
+    return true;
+}
+
+static bool i2c_slave_attach_gpio(i2c_slave_struct_t * i2c, int8_t sda, int8_t scl)
+{
+    if (i2c == NULL) {
+        log_e("no control block");
+        return false;
+    }
+    
+    if ((sda < 0)||( scl < 0)) {
+        log_e("bad pins sda=%d, scl=%d",sda,scl);
+        return false;
+    }
+
+    i2c->scl = scl;
+    gpio_set_level(scl, 1);
+    i2c_slave_gpio_mode(scl, GPIO_MODE_INPUT_OUTPUT_OD);
+    gpio_matrix_out(scl, I2C_SCL_IDX(i2c->num), false, false);
+    gpio_matrix_in(scl, I2C_SCL_IDX(i2c->num), false);
+
+    i2c->sda = sda;
+    gpio_set_level(sda, 1);
+    i2c_slave_gpio_mode(sda, GPIO_MODE_INPUT_OUTPUT_OD);
+    gpio_matrix_out(sda, I2C_SDA_IDX(i2c->num), false, false);
+    gpio_matrix_in(sda, I2C_SDA_IDX(i2c->num), false);
+
+    return true;
+}
+
+static bool i2c_slave_detach_gpio(i2c_slave_struct_t * i2c)
+{
+    if (i2c == NULL) {
+        log_e("no control Block");
+        return false;
+    }
+    if (i2c->scl >= 0) {
+        gpio_matrix_out(i2c->scl, 0x100, false, false);
+        gpio_matrix_in(0x30, I2C_SCL_IDX(i2c->num), false);
+        i2c_slave_gpio_mode(i2c->scl, GPIO_MODE_INPUT);
+        i2c->scl = -1; // un attached
+    }
+    if (i2c->sda >= 0) {
+        gpio_matrix_out(i2c->sda, 0x100, false, false);
+        gpio_matrix_in(0x30, I2C_SDA_IDX(i2c->num), false);
+        i2c_slave_gpio_mode(i2c->sda, GPIO_MODE_INPUT);
+        i2c->sda = -1; // un attached
+    }
+    return true;
+}
+
+static bool i2c_slave_send_event(i2c_slave_struct_t * i2c, i2c_slave_queue_event_t* event)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    if(i2c->event_queue) {
+        if(xQueueSendFromISR(i2c->event_queue, event, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            //log_e("event_queue_full");
+        }
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static bool i2c_slave_handle_tx_fifo_empty(i2c_slave_struct_t * i2c)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    uint32_t d = 0, moveCnt = i2c_ll_get_txfifo_len(i2c->dev);
+    while (moveCnt > 0) { // read tx queue until Fifo is full or queue is empty
+        if(xQueueReceiveFromISR(i2c->tx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) == pdTRUE){
+            i2c_ll_write_txfifo(i2c->dev, (uint8_t*)&d, 1);
+            moveCnt--;
+        } else {
+            i2c_ll_slave_disable_tx_it(i2c->dev);
+            break;
+        }
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static bool i2c_slave_handle_rx_fifo_full(i2c_slave_struct_t * i2c, uint32_t len)
+{
+#if I2C_SLAVE_USE_RX_QUEUE
+    uint32_t d = 0;
+#else
+    uint8_t data[SOC_I2C_FIFO_LEN];
+#endif
+    bool pxHigherPriorityTaskWoken = false;
+#if I2C_SLAVE_USE_RX_QUEUE
+    while (len > 0) {
+        i2c_ll_read_rxfifo(i2c->dev, (uint8_t*)&d, 1);
+        if(xQueueSendFromISR(i2c->rx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            log_e("rx_queue_full");
+        } else {
+            i2c->rx_data_count++;
+        }
+        if (--len == 0) {
+            len = i2c_ll_get_rxfifo_cnt(i2c->dev);
+        }
+#else
+    if(len){
+        i2c_ll_read_rxfifo(i2c->dev, data, len);
+        if(xRingbufferSendFromISR(i2c->rx_ring_buf, (void*) data, len, (BaseType_t * const)&pxHigherPriorityTaskWoken) != pdTRUE){
+            log_e("rx_ring_buf_full");
+        } else {
+            i2c->rx_data_count += len;
+        }
+#endif
+    }
+    return pxHigherPriorityTaskWoken;
+}
+
+static void i2c_slave_isr_handler(void* arg)
+{
+    bool pxHigherPriorityTaskWoken = false;
+    i2c_slave_struct_t * i2c = (i2c_slave_struct_t *) arg; // recover data
+
+    uint32_t activeInt = i2c_ll_get_intsts_mask(i2c->dev);
+    i2c_ll_clr_intsts_mask(i2c->dev, activeInt);
+    uint8_t rx_fifo_len = i2c_ll_get_rxfifo_cnt(i2c->dev);
+    uint8_t tx_fifo_len = SOC_I2C_FIFO_LEN - i2c_ll_get_txfifo_len(i2c->dev);
+    bool slave_rw = i2c_ll_slave_rw(i2c->dev);
+
+    if(activeInt & I2C_RXFIFO_WM_INT_ENA){ // RX FiFo Full
+        pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+        i2c_ll_slave_enable_rx_it(i2c->dev);//is this necessary?
+    }
+
+    if(activeInt & I2C_TRANS_COMPLETE_INT_ENA){ // STOP
+        if(rx_fifo_len){ //READ RX FIFO
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+        }
+        if(i2c->rx_data_count){ //WRITE or RepeatedStart
+            //SEND RX Event
+            i2c_slave_queue_event_t event;
+            event.event = I2C_SLAVE_EVT_RX;
+            event.stop = !slave_rw;
+            event.param = i2c->rx_data_count;
+            pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+            //Zero RX count
+            i2c->rx_data_count = 0;
+        }
+        if(slave_rw){ // READ
+#if CONFIG_IDF_TARGET_ESP32
+            if(i2c->dev->status_reg.scl_main_state_last == 6){
+                //SEND TX Event
+                i2c_slave_queue_event_t event;
+                event.event = I2C_SLAVE_EVT_TX;
+                pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+            }
+#else
+            //reset TX data
+            i2c_ll_txfifo_rst(i2c->dev);
+            uint8_t d;
+            while (xQueueReceiveFromISR(i2c->tx_queue, &d, (BaseType_t * const)&pxHigherPriorityTaskWoken) == pdTRUE) ;//flush partial write
+#endif
+        }
+    }
+
+#ifndef CONFIG_IDF_TARGET_ESP32
+    if(activeInt & I2C_SLAVE_STRETCH_INT_ENA){ // STRETCH
+        i2c_stretch_cause_t cause = i2c_ll_stretch_cause(i2c->dev);
+        if(cause == I2C_STRETCH_CAUSE_MASTER_READ){
+            //on C3 RX data dissapears with repeated start, so we need to get it here
+            if(rx_fifo_len){
+                pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+            }
+            //SEND TX Event
+            i2c_slave_queue_event_t event;
+            event.event = I2C_SLAVE_EVT_TX;
+            pxHigherPriorityTaskWoken |= i2c_slave_send_event(i2c, &event);
+            //will clear after execution
+        } else if(cause == I2C_STRETCH_CAUSE_TX_FIFO_EMPTY){
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_tx_fifo_empty(i2c);
+            i2c_ll_stretch_clr(i2c->dev);
+        } else if(cause == I2C_STRETCH_CAUSE_RX_FIFO_FULL){
+            pxHigherPriorityTaskWoken |= i2c_slave_handle_rx_fifo_full(i2c, rx_fifo_len);
+            i2c_ll_stretch_clr(i2c->dev);
+        }
+    }
+#endif
+
+    if(activeInt & I2C_TXFIFO_WM_INT_ENA){ // TX FiFo Empty
+        pxHigherPriorityTaskWoken |= i2c_slave_handle_tx_fifo_empty(i2c);
+    }
+
+    if(pxHigherPriorityTaskWoken){
+        portYIELD_FROM_ISR();
+    }
+}
+
+static size_t i2c_slave_read_rx(i2c_slave_struct_t * i2c, uint8_t * data, size_t len){
+    if(!len){
+        return 0;
+    }
+#if I2C_SLAVE_USE_RX_QUEUE
+    uint8_t d = 0;
+    BaseType_t res = pdTRUE;
+    for(size_t i=0; i<len; i++) {
+        if(data){
+            res = xQueueReceive(i2c->rx_queue, &data[i], 0);
+        } else {
+            res = xQueueReceive(i2c->rx_queue, &d, 0);
+        }
+        if (res != pdTRUE) {
+            log_e("Read Queue(%u) Failed", i);
+            len = i;
+            break;
+        }
+    }
+    return (data)?len:0;
+#else
+    size_t  dlen = 0, 
+            to_read = len, 
+            so_far = 0, 
+            available = 0;
+    uint8_t * rx_data = NULL;
+
+    vRingbufferGetInfo(i2c->rx_ring_buf, NULL, NULL, NULL, NULL, &available);
+    if(available < to_read){
+        log_e("Less available than requested. %u < %u", available, len);
+        to_read = available;
+    }
+
+    while(to_read){
+        dlen = 0;
+        rx_data = (uint8_t *)xRingbufferReceiveUpTo(i2c->rx_ring_buf, &dlen, 0, to_read);
+        if(!rx_data){
+            log_e("Receive %u Failed", to_read);
+            return so_far;
+        }
+        if(data){
+            memcpy(data+so_far, rx_data, dlen);
+        }
+        vRingbufferReturnItem(i2c->rx_ring_buf, rx_data);
+        so_far+=dlen;
+        to_read-=dlen;
+    }
+    return (data)?so_far:0;
+#endif
+}
+
+static void i2c_slave_task(void *pv_args)
+{
+    i2c_slave_struct_t * i2c = (i2c_slave_struct_t *)pv_args;
+    i2c_slave_queue_event_t event;
+    size_t len = 0;
+    bool stop = false;
+    uint8_t * data = NULL;
+    for(;;){
+        if(xQueueReceive(i2c->event_queue, &event, portMAX_DELAY) == pdTRUE){
+            // Write
+            if(event.event == I2C_SLAVE_EVT_RX){
+                len = event.param;
+                stop = event.stop;
+                data = (len > 0)?(uint8_t*)malloc(len):NULL;
+
+                if(len && data == NULL){
+                    log_e("Malloc (%u) Failed", len);
+                }
+                len = i2c_slave_read_rx(i2c, data, len);
+                if(i2c->receive_callback){
+                    i2c->receive_callback(i2c->num, data, len, stop, i2c->arg);
+                }
+                free(data);
+
+            // Read
+            } else if(event.event == I2C_SLAVE_EVT_TX){
+                if(i2c->request_callback){
+                    i2c->request_callback(i2c->num, i2c->arg);
+                }
+                i2c_ll_stretch_clr(i2c->dev);
+            }
+        }
+    }
+    vTaskDelete(NULL);
+}

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

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

cores/esp32/esp32-hal-i2c.h

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // modified Nov 2017 by Chuck Todd <StickBreaker> to support Interrupt Driven I/O
+// modified Nov 2021 by Hristo Gochkov <Me-No-Dev> to support ESP-IDF API
 
 #ifndef _ESP32_HAL_I2C_H_
 #define _ESP32_HAL_I2C_H_
@@ -22,48 +23,16 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/event_groups.h"
+#include <esp_err.h>
 
-// External Wire.h equivalent error Codes
-typedef enum {
-    I2C_ERROR_OK=0,
-    I2C_ERROR_DEV,
-    I2C_ERROR_ACK,
-    I2C_ERROR_TIMEOUT,
-    I2C_ERROR_BUS,
-    I2C_ERROR_BUSY,
-    I2C_ERROR_MEMORY,
-    I2C_ERROR_CONTINUE,
-    I2C_ERROR_NO_BEGIN
-} i2c_err_t;
-
-struct i2c_struct_t;
-typedef struct i2c_struct_t i2c_t;
-
-i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed);
-void i2cRelease(i2c_t *i2c); // free ISR, Free DQ, Power off peripheral clock.  Must call i2cInit() to recover
-i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis);
-i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis, uint32_t *readCount);
-i2c_err_t i2cFlush(i2c_t *i2c);
-i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed);
-uint32_t i2cGetFrequency(i2c_t * i2c);
-
-//Functions below should be used only if well understood
-//Might be deprecated and removed in future
-i2c_err_t i2cAttachSCL(i2c_t * i2c, int8_t scl);
-i2c_err_t i2cDetachSCL(i2c_t * i2c, int8_t scl);
-i2c_err_t i2cAttachSDA(i2c_t * i2c, int8_t sda);
-i2c_err_t i2cDetachSDA(i2c_t * i2c, int8_t sda);
-
-//Stickbreakers ISR Support
-i2c_err_t i2cProcQueue(i2c_t *i2c, uint32_t *readCount, uint16_t timeOutMillis);
-i2c_err_t i2cAddQueueWrite(i2c_t *i2c, uint16_t i2cDeviceAddr, uint8_t *dataPtr, uint16_t dataLen, bool SendStop, EventGroupHandle_t event);
-i2c_err_t i2cAddQueueRead(i2c_t *i2c, uint16_t i2cDeviceAddr, uint8_t *dataPtr, uint16_t dataLen, bool SendStop, EventGroupHandle_t event);
-
-//stickbreaker debug support
-void i2cDumpInts(uint8_t num);
-void i2cDumpI2c(i2c_t *i2c);
+esp_err_t i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed);
+esp_err_t i2cDeinit(uint8_t i2c_num);
+esp_err_t i2cSetClock(uint8_t i2c_num, uint32_t frequency);
+esp_err_t i2cGetClock(uint8_t i2c_num, uint32_t * frequency);
+esp_err_t i2cWrite(uint8_t i2c_num, uint16_t address, const uint8_t* buff, size_t size, uint32_t timeOutMillis);
+esp_err_t i2cRead(uint8_t i2c_num, uint16_t address, uint8_t* buff, size_t size, uint32_t timeOutMillis, size_t *readCount);
+esp_err_t i2cWriteReadNonStop(uint8_t i2c_num, uint16_t address, const uint8_t* wbuff, size_t wsize, uint8_t* rbuff, size_t rsize, uint32_t timeOutMillis, size_t *readCount);
+bool i2cIsInit(uint8_t i2c_num);
 
 #ifdef __cplusplus
 }

cores/esp32/esp32-hal-ledc.c

@@ -13,24 +13,25 @@
 // limitations under the License.
 
 #include "esp32-hal.h"
-#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 "soc/soc_caps.h"
+#include "driver/ledc.h"
 
-#if CONFIG_DISABLE_HAL_LOCKS
-#define LEDC_MUTEX_LOCK()
-#define LEDC_MUTEX_UNLOCK()
+#ifdef SOC_LEDC_SUPPORT_HS_MODE
+#define LEDC_CHANNELS           (SOC_LEDC_CHANNEL_NUM<<1)
 #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;
+#define LEDC_CHANNELS           (SOC_LEDC_CHANNEL_NUM)
 #endif
 
+//Use XTAL clock if possible to avoid timer frequency error when setting APB clock < 80 Mhz
+//Need to be fixed in ESP-IDF
+#ifdef SOC_LEDC_SUPPORT_XTAL_CLOCK
+#define LEDC_DEFAULT_CLK        LEDC_USE_XTAL_CLK
+#else
+#define LEDC_DEFAULT_CLK        LEDC_AUTO_CLK
+#endif
+
+#define LEDC_MAX_BIT_WIDTH      SOC_LEDC_TIMER_BIT_WIDE_NUM
+
 /*
  * LEDC Chan to Group/Channel/Timer Mapping
 ** ledc: 0  => Group: 0, Channel: 0, Timer: 0
@@ -50,170 +51,103 @@ xSemaphoreHandle _ledc_sys_lock;
 ** ledc: 14 => Group: 1, Channel: 6, Timer: 3
 ** ledc: 15 => Group: 1, Channel: 7, Timer: 3
 */
-#define LEDC_CHAN(g,c) LEDC.channel_group[(g)].channel[(c)]
-#define LEDC_TIMER(g,t) LEDC.timer_group[(g)].timer[(t)]
 
-//uint32_t frequency = (80MHz or 1MHz)/((div_num / 256.0)*(1 << bit_num));
-static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, bool apb_clk)
-{
-    uint8_t group=(chan/8), timer=((chan/2)%4);
-    static bool tHasStarted = false;
-    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
-#if !CONFIG_DISABLE_HAL_LOCKS
-        _ledc_sys_lock = xSemaphoreCreateMutex();
-#endif
-    }
-    LEDC_MUTEX_LOCK();
-    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(group) {
-        LEDC_TIMER(group, timer).conf.low_speed_update = 1;//This bit is only useful for low speed timer channels, reserved for high speed timers
-    }
-    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();
-}
+uint8_t channels_resolution[LEDC_CHANNELS] = {0};
 
-//max div_num 0x3FFFF (262143)
-//max bit_num 0x1F (31)
-static double _ledcSetupTimerFreq(uint8_t chan, double freq, uint8_t bit_num)
+uint32_t ledcSetup(uint8_t chan, uint32_t freq, uint8_t bit_num)
 {
-    uint64_t clk_freq = APB_CLK_FREQ;
-    clk_freq <<= 8;//div_num is 8 bit decimal
-    uint32_t div_num = (clk_freq >> bit_num) / freq;
-    bool apb_clk = true;
-    if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
-        clk_freq /= 80;
-        div_num = (clk_freq >> bit_num) / freq;
-        if(div_num > LEDC_DIV_NUM_HSTIMER0_V) {
-            div_num = LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
-        }
-        apb_clk = false;
-    } else if(div_num < 256) {
-        div_num = 256;//highest clock possible
-    }
-    _ledcSetupTimer(chan, div_num, bit_num, apb_clk);
-    //log_i("Fin: %f, Fclk: %uMhz, bits: %u, DIV: %u, Fout: %f",
-    //        freq, apb_clk?80:1, bit_num, div_num, (clk_freq >> bit_num) / (double)div_num);
-    return (clk_freq >> bit_num) / (double)div_num;
-}
-
-static double _ledcTimerRead(uint8_t chan)
-{
-    uint32_t div_num;
-    uint8_t bit_num;
-    bool apb_clk;
-    uint8_t group=(chan/8), timer=((chan/2)%4);
-    LEDC_MUTEX_LOCK();
-    div_num = LEDC_TIMER(group, timer).conf.clock_divider;//18 bit (10.8) This register is used to configure parameter for divider in timer the least significant eight bits represent the decimal part.
-    bit_num = LEDC_TIMER(group, timer).conf.duty_resolution;//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.
-    apb_clk = LEDC_TIMER(group, timer).conf.tick_sel;//apb clock
-    LEDC_MUTEX_UNLOCK();
-    uint64_t clk_freq = 1000000;
-    if(apb_clk) {
-        clk_freq *= 80;
-    }
-    clk_freq <<= 8;//div_num is 8 bit decimal
-    return (clk_freq >> bit_num) / (double)div_num;
-}
-
-static void _ledcSetupChannel(uint8_t chan, uint8_t idle_level)
-{
-    uint8_t group=(chan/8), channel=(chan%8), timer=((chan/2)%4);
-    LEDC_MUTEX_LOCK();
-    LEDC_CHAN(group, channel).conf0.timer_sel = timer;//2 bit Selects the timer to attach 0-3
-    LEDC_CHAN(group, channel).conf0.idle_lv = idle_level;//1 bit This bit is used to control the output value when channel is off.
-    LEDC_CHAN(group, channel).hpoint.hpoint = 0;//20 bit The output value changes to high when timer selected by channel has reached hpoint
-    LEDC_CHAN(group, channel).conf1.duty_inc = 1;//1 bit This register is used to increase the duty of output signal or decrease the duty of output signal for high speed channel
-    LEDC_CHAN(group, channel).conf1.duty_num = 1;//10 bit This register is used to control the number of increased or decreased times for channel
-    LEDC_CHAN(group, channel).conf1.duty_cycle = 1;//10 bit This register is used to increase or decrease the duty every duty_cycle cycles for channel
-    LEDC_CHAN(group, channel).conf1.duty_scale = 0;//10 bit This register controls the increase or decrease step scale for channel.
-    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(group) {
-        LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
-    } else {
-        LEDC_CHAN(group, channel).conf0.clk_en = 0;
-    }
-    LEDC_MUTEX_UNLOCK();
-}
-
-double ledcSetup(uint8_t chan, double freq, uint8_t bit_num)
-{
-    if(chan > 15) {
+    if(chan >= LEDC_CHANNELS || bit_num > LEDC_MAX_BIT_WIDTH){
+        log_e("No more LEDC channels available! (maximum %u) or bit width too big (maximum %u)", LEDC_CHANNELS, LEDC_MAX_BIT_WIDTH);
         return 0;
     }
-    double res_freq = _ledcSetupTimerFreq(chan, freq, bit_num);
-    _ledcSetupChannel(chan, LOW);
-    return res_freq;
+
+    uint8_t group=(chan/8), timer=((chan/2)%4);
+
+    ledc_timer_config_t ledc_timer = {
+        .speed_mode       = group,
+        .timer_num        = timer,
+        .duty_resolution  = bit_num,
+        .freq_hz          = freq,
+        .clk_cfg          = LEDC_DEFAULT_CLK
+    };
+    if(ledc_timer_config(&ledc_timer) != ESP_OK)
+    {
+        log_e("ledc setup failed!");
+        return 0;
+    }
+    channels_resolution[chan] = bit_num;
+    return ledc_get_freq(group,timer);
 }
 
 void ledcWrite(uint8_t chan, uint32_t duty)
 {
-    if(chan > 15) {
+    if(chan >= LEDC_CHANNELS){
         return;
     }
     uint8_t group=(chan/8), channel=(chan%8);
-    LEDC_MUTEX_LOCK();
-    LEDC_CHAN(group, channel).duty.duty = duty << 4;//25 bit (21.4)
-    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(group) {
-            LEDC_CHAN(group, channel).conf0.val |= BIT(4);
-        } else {
-            LEDC_CHAN(group, channel).conf0.clk_en = 1;
-        }
-    } 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(group) {
-            LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
-        } else {
-            LEDC_CHAN(group, channel).conf0.clk_en = 0;
-        }
+
+    //Fixing if all bits in resolution is set = LEDC FULL ON
+    uint32_t max_duty = (1 << channels_resolution[chan]) - 1;
+
+    if(duty == max_duty){
+        duty = max_duty + 1;
     }
-    LEDC_MUTEX_UNLOCK();
+
+    ledc_set_duty(group, channel, duty);
+    ledc_update_duty(group, channel);
 }
 
 uint32_t ledcRead(uint8_t chan)
 {
-    if(chan > 15) {
+    if(chan >= LEDC_CHANNELS){
         return 0;
     }
-    return LEDC.channel_group[chan/8].channel[chan%8].duty.duty >> 4;
+    uint8_t group=(chan/8), channel=(chan%8);
+    return ledc_get_duty(group,channel);
 }
 
-double ledcReadFreq(uint8_t chan)
+uint32_t ledcReadFreq(uint8_t chan)
 {
     if(!ledcRead(chan)){
         return 0;
     }
-    return _ledcTimerRead(chan);
+    uint8_t group=(chan/8), timer=((chan/2)%4);
+    return ledc_get_freq(group,timer);
 }
 
-double ledcWriteTone(uint8_t chan, double freq)
+uint32_t ledcWriteTone(uint8_t chan, uint32_t freq)
 {
-    if(chan > 15) {
+    if(chan >= LEDC_CHANNELS){
         return 0;
     }
-    if(!freq) {
+    if(!freq){
         ledcWrite(chan, 0);
         return 0;
     }
-    double res_freq = _ledcSetupTimerFreq(chan, freq, 10);
+
+    uint8_t group=(chan/8), timer=((chan/2)%4);
+
+    ledc_timer_config_t ledc_timer = {
+        .speed_mode       = group,
+        .timer_num        = timer,
+        .duty_resolution  = 10,
+        .freq_hz          = freq, 
+        .clk_cfg          = LEDC_DEFAULT_CLK
+    };
+
+    if(ledc_timer_config(&ledc_timer) != ESP_OK)
+    {
+        log_e("ledcSetup failed!");
+        return 0;
+    }
+    channels_resolution[chan] = 10;
+
+    uint32_t res_freq = ledc_get_freq(group,timer);
     ledcWrite(chan, 0x1FF);
     return res_freq;
 }
 
-double ledcWriteNote(uint8_t chan, note_t note, uint8_t octave){
+uint32_t ledcWriteNote(uint8_t chan, note_t note, uint8_t octave){
     const uint16_t noteFrequencyBase[12] = {
     //   C        C#       D        Eb       E        F       F#        G       G#        A       Bb        B
         4186,    4435,    4699,    4978,    5274,    5588,    5920,    6272,    6645,    7040,    7459,    7902
@@ -222,20 +156,73 @@ double ledcWriteNote(uint8_t chan, note_t note, uint8_t octave){
     if(octave > 8 || note >= NOTE_MAX){
         return 0;
     }
-    double noteFreq =  (double)noteFrequencyBase[note] / (double)(1 << (8-octave));
+    uint32_t noteFreq =  (uint32_t)noteFrequencyBase[note] / (uint32_t)(1 << (8-octave));
     return ledcWriteTone(chan, noteFreq);
 }
 
 void ledcAttachPin(uint8_t pin, uint8_t chan)
 {
-    if(chan > 15) {
+    if(chan >= LEDC_CHANNELS){
         return;
     }
-    pinMode(pin, OUTPUT);
-    pinMatrixOutAttach(pin, ((chan/8)?LEDC_LS_SIG_OUT0_IDX:LEDC_HS_SIG_OUT0_IDX) + (chan%8), false, false);
+    uint8_t group=(chan/8), channel=(chan%8), timer=((chan/2)%4);
+    
+    ledc_channel_config_t ledc_channel = {
+        .speed_mode     = group,
+        .channel        = channel,
+        .timer_sel      = timer,
+        .intr_type      = LEDC_INTR_DISABLE,
+        .gpio_num       = pin,
+        .duty           = 0,
+        .hpoint         = 0
+    };
+    ledc_channel_config(&ledc_channel);
 }
 
 void ledcDetachPin(uint8_t pin)
 {
     pinMatrixOutDetach(pin, false, false);
 }
+
+uint32_t ledcChangeFrequency(uint8_t chan, uint32_t freq, uint8_t bit_num)
+{
+    if(chan >= LEDC_CHANNELS || bit_num > LEDC_MAX_BIT_WIDTH){
+        log_e("LEDC channel not available! (maximum %u) or bit width too big (maximum %u)", LEDC_CHANNELS, LEDC_MAX_BIT_WIDTH);
+        return 0;
+    }
+    uint8_t group=(chan/8), timer=((chan/2)%4);
+
+    ledc_timer_config_t ledc_timer = {
+        .speed_mode       = group,
+        .timer_num        = timer,
+        .duty_resolution  = bit_num,
+        .freq_hz          = freq, 
+        .clk_cfg          = LEDC_DEFAULT_CLK
+    };
+
+    if(ledc_timer_config(&ledc_timer) != ESP_OK)
+    {
+        log_e("ledcChangeFrequency failed!");
+        return 0;
+    }
+    channels_resolution[chan] = bit_num;
+    return ledc_get_freq(group,timer);
+}
+
+static int8_t pin_to_channel[SOC_GPIO_PIN_COUNT] = { 0 };
+static int cnt_channel = LEDC_CHANNELS;
+void analogWrite(uint8_t pin, int value) {
+  // Use ledc hardware for internal pins
+  if (pin < SOC_GPIO_PIN_COUNT) {
+    if (pin_to_channel[pin] == 0) {
+      if (!cnt_channel) {
+          log_e("No more analogWrite channels available! You can have maximum %u", LEDC_CHANNELS);
+          return;
+      }
+      pin_to_channel[pin] = cnt_channel--;
+      ledcAttachPin(pin, cnt_channel);
+      ledcSetup(cnt_channel, 1000, 8);
+    }
+    ledcWrite(pin_to_channel[pin] - 1, value);
+  }
+}

cores/esp32/esp32-hal-ledc.h

@@ -27,14 +27,15 @@ typedef enum {
 } note_t;
 
 //channel 0-15 resolution 1-16bits freq limits depend on resolution
-double      ledcSetup(uint8_t channel, double freq, uint8_t resolution_bits);
+uint32_t    ledcSetup(uint8_t channel, uint32_t freq, uint8_t resolution_bits);
 void        ledcWrite(uint8_t channel, uint32_t duty);
-double      ledcWriteTone(uint8_t channel, double freq);
-double      ledcWriteNote(uint8_t channel, note_t note, uint8_t octave);
+uint32_t    ledcWriteTone(uint8_t channel, uint32_t freq);
+uint32_t    ledcWriteNote(uint8_t channel, note_t note, uint8_t octave);
 uint32_t    ledcRead(uint8_t channel);
-double      ledcReadFreq(uint8_t channel);
+uint32_t    ledcReadFreq(uint8_t channel);
 void        ledcAttachPin(uint8_t pin, uint8_t channel);
 void        ledcDetachPin(uint8_t pin);
+uint32_t    ledcChangeFrequency(uint8_t channel, uint32_t freq, uint8_t resolution_bits);
 
 
 #ifdef __cplusplus

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)
@@ -36,6 +37,11 @@ extern "C"
 #define ARDUHAL_LOG_LEVEL CONFIG_ARDUHAL_LOG_DEFAULT_LEVEL
 #else
 #define ARDUHAL_LOG_LEVEL CORE_DEBUG_LEVEL
+#ifdef USE_ESP_IDF_LOG
+#ifndef LOG_LOCAL_LEVEL
+#define LOG_LOCAL_LEVEL CORE_DEBUG_LEVEL
+#endif
+#endif
 #endif
 
 #ifndef CONFIG_ARDUHAL_LOG_COLORS
@@ -62,6 +68,8 @@ extern "C"
 #define ARDUHAL_LOG_COLOR_I       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_GREEN)
 #define ARDUHAL_LOG_COLOR_D       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_CYAN)
 #define ARDUHAL_LOG_COLOR_V       ARDUHAL_LOG_COLOR(ARDUHAL_LOG_COLOR_GRAY)
+#define ARDUHAL_LOG_COLOR_PRINT(letter) log_printf(ARDUHAL_LOG_COLOR_ ## letter)
+#define ARDUHAL_LOG_COLOR_PRINT_END log_printf(ARDUHAL_LOG_RESET_COLOR)
 #else
 #define ARDUHAL_LOG_COLOR_E
 #define ARDUHAL_LOG_COLOR_W
@@ -69,64 +77,146 @@ extern "C"
 #define ARDUHAL_LOG_COLOR_D
 #define ARDUHAL_LOG_COLOR_V
 #define ARDUHAL_LOG_RESET_COLOR
+#define ARDUHAL_LOG_COLOR_PRINT(letter)
+#define ARDUHAL_LOG_COLOR_PRINT_END
 #endif
 
+
+
 const char * pathToFileName(const char * path);
 int log_printf(const char *fmt, ...);
+void log_print_buf(const uint8_t *b, size_t len);
 
 #define ARDUHAL_SHORT_LOG_FORMAT(letter, format)  ARDUHAL_LOG_COLOR_ ## letter format ARDUHAL_LOG_RESET_COLOR "\r\n"
-#define ARDUHAL_LOG_FORMAT(letter, format)  ARDUHAL_LOG_COLOR_ ## letter "[" #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
+#ifndef USE_ESP_IDF_LOG
 #define log_v(format, ...) log_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
+#define isr_log_v(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(V, format), ##__VA_ARGS__)
+#define log_buf_v(b,l) do{ARDUHAL_LOG_COLOR_PRINT(V);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_v(format, ...)
+#define log_v(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_VERBOSE, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_v(format, ...) do {ets_printf(LOG_FORMAT(V, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_v(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_VERBOSE);}while(0)
+#endif
+#else
+#define log_v(format, ...)  do {} while(0)
+#define isr_log_v(format, ...)  do {} while(0)
+#define log_buf_v(b,l)  do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_DEBUG
+#ifndef USE_ESP_IDF_LOG
 #define log_d(format, ...) log_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
+#define isr_log_d(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(D, format), ##__VA_ARGS__)
+#define log_buf_d(b,l) do{ARDUHAL_LOG_COLOR_PRINT(D);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_d(format, ...)
+#define log_d(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_DEBUG, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_d(format, ...) do {ets_printf(LOG_FORMAT(D, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_d(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_DEBUG);}while(0)
+#endif
+#else
+#define log_d(format, ...)  do {} while(0)
+#define isr_log_d(format, ...) do {} while(0)
+#define log_buf_d(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO
+#ifndef USE_ESP_IDF_LOG
 #define log_i(format, ...) log_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
+#define isr_log_i(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(I, format), ##__VA_ARGS__)
+#define log_buf_i(b,l) do{ARDUHAL_LOG_COLOR_PRINT(I);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_i(format, ...)
+#define log_i(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_INFO, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_i(format, ...) do {ets_printf(LOG_FORMAT(I, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_i(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_INFO);}while(0)
+#endif
+#else
+#define log_i(format, ...) do {} while(0)
+#define isr_log_i(format, ...) do {} while(0)
+#define log_buf_i(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_WARN
+#ifndef USE_ESP_IDF_LOG
 #define log_w(format, ...) log_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
+#define isr_log_w(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(W, format), ##__VA_ARGS__)
+#define log_buf_w(b,l) do{ARDUHAL_LOG_COLOR_PRINT(W);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_w(format, ...)
+#define log_w(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_WARN, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_w(format, ...) do {ets_printf(LOG_FORMAT(W, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_w(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_WARN);}while(0)
+#endif
+#else
+#define log_w(format, ...) do {} while(0)
+#define isr_log_w(format, ...) do {} while(0)
+#define log_buf_w(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_ERROR
+#ifndef USE_ESP_IDF_LOG
 #define log_e(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define isr_log_e(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define log_buf_e(b,l) do{ARDUHAL_LOG_COLOR_PRINT(E);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_e(format, ...)
+#define log_e(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_ERROR, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_e(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_e(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_ERROR);}while(0)
+#endif
+#else
+#define log_e(format, ...) do {} while(0)
+#define isr_log_e(format, ...) do {} while(0)
+#define log_buf_e(b,l) do {} while(0)
 #endif
 
 #if ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_NONE
+#ifndef USE_ESP_IDF_LOG
 #define log_n(format, ...) log_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define isr_log_n(format, ...) ets_printf(ARDUHAL_LOG_FORMAT(E, format), ##__VA_ARGS__)
+#define log_buf_n(b,l) do{ARDUHAL_LOG_COLOR_PRINT(E);log_print_buf(b,l);ARDUHAL_LOG_COLOR_PRINT_END;}while(0)
 #else
-#define log_n(format, ...)
+#define log_n(format, ...) do {ESP_LOG_LEVEL_LOCAL(ESP_LOG_ERROR, TAG, format, ##__VA_ARGS__);}while(0)
+#define isr_log_n(format, ...) do {ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), TAG, ##__VA_ARGS__);}while(0)
+#define log_buf_n(b,l) do {ESP_LOG_BUFFER_HEXDUMP(TAG, b, l, ESP_LOG_ERROR);}while(0)
+#endif
+#else
+#define log_n(format, ...) do {} while(0)
+#define isr_log_n(format, ...) do {} while(0)
+#define log_buf_n(b,l) do {} while(0)
 #endif
 
 #include "esp_log.h"
 
+#ifdef USE_ESP_IDF_LOG
+//#ifndef TAG
+//#define TAG "ARDUINO"
+//#endif
+//#define log_n(format, ...) myLog(ESP_LOG_NONE, format, ##__VA_ARGS__)
+#else
 #ifdef CONFIG_ARDUHAL_ESP_LOG
 #undef ESP_LOGE
 #undef ESP_LOGW
 #undef ESP_LOGI
 #undef ESP_LOGD
 #undef ESP_LOGV
+#undef ESP_EARLY_LOGE
+#undef ESP_EARLY_LOGW
+#undef ESP_EARLY_LOGI
+#undef ESP_EARLY_LOGD
+#undef ESP_EARLY_LOGV
 
-#define ESP_LOGE(tag, ...)  log_e(__VA_ARGS__)
-#define ESP_LOGW(tag, ...)  log_w(__VA_ARGS__)
-#define ESP_LOGI(tag, ...)  log_i(__VA_ARGS__)
-#define ESP_LOGD(tag, ...)  log_d(__VA_ARGS__)
-#define ESP_LOGV(tag, ...)  log_v(__VA_ARGS__)
+#define ESP_LOGE(tag, format, ...)  log_e("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_LOGW(tag, format, ...)  log_w("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_LOGI(tag, format, ...)  log_i("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_LOGD(tag, format, ...)  log_d("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_LOGV(tag, format, ...)  log_v("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_EARLY_LOGE(tag, format, ...)  isr_log_e("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_EARLY_LOGW(tag, format, ...)  isr_log_w("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_EARLY_LOGI(tag, format, ...)  isr_log_i("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_EARLY_LOGD(tag, format, ...)  isr_log_d("[%s] " format, tag, ##__VA_ARGS__)
+#define ESP_EARLY_LOGV(tag, format, ...)  isr_log_v("[%s] " format, tag, ##__VA_ARGS__)
+#endif
 #endif
 
 #ifdef __cplusplus

cores/esp32/esp32-hal-matrix.c

@@ -14,33 +14,49 @@
 
 #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"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/rom/gpio.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/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

@@ -21,32 +21,156 @@
 #include "esp_partition.h"
 #include "esp_log.h"
 #include "esp_timer.h"
+#ifdef CONFIG_APP_ROLLBACK_ENABLE
+#include "esp_ota_ops.h"
+#endif //CONFIG_APP_ROLLBACK_ENABLE
+#ifdef CONFIG_BT_ENABLED
 #include "esp_bt.h"
+#endif //CONFIG_BT_ENABLED
 #include <sys/time.h>
+#include "soc/rtc.h"
+#include "soc/rtc_cntl_reg.h"
+#include "soc/apb_ctrl_reg.h"
+#include "esp_task_wdt.h"
 #include "esp32-hal.h"
 
+#include "esp_system.h"
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/rtc.h"
+#include "driver/temp_sensor.h"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/rom/rtc.h"
+#include "driver/temp_sensor.h"
+#elif CONFIG_IDF_TARGET_ESP32C3
+#include "esp32c3/rom/rtc.h"
+#include "driver/temp_sensor.h"
+#else 
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#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
+#ifdef CONFIG_IDF_TARGET_ESP32
 uint8_t temprature_sens_read();
 
 float temperatureRead()
 {
     return (temprature_sens_read() - 32) / 1.8;
 }
+#else
+float temperatureRead()
+{
+    float result = NAN;
+    temp_sensor_config_t tsens = TSENS_CONFIG_DEFAULT();
+    temp_sensor_set_config(tsens);
+    temp_sensor_start();
+    temp_sensor_read_celsius(&result); 
+    temp_sensor_stop();
+    return result;
+}
+#endif
 
-void yield()
+void __yield()
 {
     vPortYield();
 }
 
-unsigned long IRAM_ATTR micros()
-{
-    return (unsigned long) esp_timer_get_time();
+void yield() __attribute__ ((weak, alias("__yield")));
+
+#if CONFIG_AUTOSTART_ARDUINO
+
+extern TaskHandle_t loopTaskHandle;
+extern bool loopTaskWDTEnabled;
+
+void enableLoopWDT(){
+    if(loopTaskHandle != NULL){
+        if(esp_task_wdt_add(loopTaskHandle) != ESP_OK){
+            log_e("Failed to add loop task to WDT");
+        } else {
+            loopTaskWDTEnabled = true;
+        }
+    }
 }
 
-unsigned long IRAM_ATTR millis()
+void disableLoopWDT(){
+    if(loopTaskHandle != NULL && loopTaskWDTEnabled){
+        loopTaskWDTEnabled = false;
+        if(esp_task_wdt_delete(loopTaskHandle) != ESP_OK){
+            log_e("Failed to remove loop task from WDT");
+        }
+    }
+}
+
+void feedLoopWDT(){
+    esp_err_t err = esp_task_wdt_reset();
+    if(err != ESP_OK){
+        log_e("Failed to feed WDT! Error: %d", err);
+    }
+}
+#endif
+
+void enableCore0WDT(){
+    TaskHandle_t idle_0 = xTaskGetIdleTaskHandleForCPU(0);
+    if(idle_0 == NULL || esp_task_wdt_add(idle_0) != ESP_OK){
+        log_e("Failed to add Core 0 IDLE task to WDT");
+    }
+}
+
+void disableCore0WDT(){
+    TaskHandle_t idle_0 = xTaskGetIdleTaskHandleForCPU(0);
+    if(idle_0 == NULL || esp_task_wdt_delete(idle_0) != ESP_OK){
+        log_e("Failed to remove Core 0 IDLE task from WDT");
+    }
+}
+
+#ifndef CONFIG_FREERTOS_UNICORE
+void enableCore1WDT(){
+    TaskHandle_t idle_1 = xTaskGetIdleTaskHandleForCPU(1);
+    if(idle_1 == NULL || esp_task_wdt_add(idle_1) != ESP_OK){
+        log_e("Failed to add Core 1 IDLE task to WDT");
+    }
+}
+
+void disableCore1WDT(){
+    TaskHandle_t idle_1 = xTaskGetIdleTaskHandleForCPU(1);
+    if(idle_1 == NULL || esp_task_wdt_delete(idle_1) != ESP_OK){
+        log_e("Failed to remove Core 1 IDLE task from WDT");
+    }
+}
+#endif
+
+BaseType_t xTaskCreateUniversal( TaskFunction_t pxTaskCode,
+                        const char * const pcName,
+                        const uint32_t usStackDepth,
+                        void * const pvParameters,
+                        UBaseType_t uxPriority,
+                        TaskHandle_t * const pxCreatedTask,
+                        const BaseType_t xCoreID ){
+#ifndef CONFIG_FREERTOS_UNICORE
+    if(xCoreID >= 0 && xCoreID < 2) {
+        return xTaskCreatePinnedToCore(pxTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask, xCoreID);
+    } else {
+#endif
+    return xTaskCreate(pxTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask);
+#ifndef CONFIG_FREERTOS_UNICORE
+    }
+#endif
+}
+
+unsigned long ARDUINO_ISR_ATTR micros()
 {
-    return (unsigned long) (esp_timer_get_time() / 1000);
+    return (unsigned long) (esp_timer_get_time());
+}
+
+unsigned long ARDUINO_ISR_ATTR millis()
+{
+    return (unsigned long) (esp_timer_get_time() / 1000ULL);
 }
 
 void delay(uint32_t ms)
@@ -54,17 +178,17 @@ 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();
+    uint64_t m = (uint64_t)esp_timer_get_time();
     if(us){
-        uint32_t e = (m + us);
+        uint64_t e = (m + us);
         if(m > e){ //overflow
-            while(micros() > e){
+            while((uint64_t)esp_timer_get_time() > e){
                 NOP();
             }
         }
-        while(micros() < e){
+        while((uint64_t)esp_timer_get_time() < e){
             NOP();
         }
     }
@@ -76,6 +200,9 @@ void initVariant() {}
 void init() __attribute__((weak));
 void init() {}
 
+bool verifyOta() __attribute__((weak));
+bool verifyOta() { return true; }
+
 #ifdef CONFIG_BT_ENABLED
 //overwritten in esp32-hal-bt.c
 bool btInUse() __attribute__((weak));
@@ -84,12 +211,31 @@ bool btInUse(){ return false; }
 
 void initArduino()
 {
-#if CONFIG_SPIRAM_SUPPORT
+#ifdef CONFIG_APP_ROLLBACK_ENABLE
+    const esp_partition_t *running = esp_ota_get_running_partition();
+    esp_ota_img_states_t ota_state;
+    if (esp_ota_get_state_partition(running, &ota_state) == ESP_OK) {
+        if (ota_state == ESP_OTA_IMG_PENDING_VERIFY) {
+            if (verifyOta()) {
+                esp_ota_mark_app_valid_cancel_rollback();
+            } else {
+                log_e("OTA verification failed! Start rollback to the previous version ...");
+                esp_ota_mark_app_invalid_rollback_and_reboot();
+            }
+        }
+    }
+#endif
+    //init proper ref tick value for PLL (uncomment if REF_TICK is different than 1MHz)
+    //ESP_REG(APB_CTRL_PLL_TICK_CONF_REG) = APB_CLK_FREQ / REF_CLK_FREQ - 1;
+#ifdef F_CPU
+    setCpuFrequencyMhz(F_CPU/1000000);
+#endif
+#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
     psramInit();
 #endif
     esp_log_level_set("*", CONFIG_LOG_DEFAULT_LEVEL);
     esp_err_t err = nvs_flash_init();
-    if(err == ESP_ERR_NVS_NO_FREE_PAGES){
+    if(err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND){
         const esp_partition_t* partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, NULL);
         if (partition != NULL) {
             err = esp_partition_erase_range(partition, 0, partition->size);
@@ -98,6 +244,8 @@ void initArduino()
             } else {
                 log_e("Failed to format the broken NVS partition!");
             }
+        } else {
+            log_e("Could not find NVS partition");
         }
     }
     if(err) {
@@ -113,7 +261,7 @@ 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

@@ -1,14 +1,50 @@
+// 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
-#include "esp_spiram.h"
+#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
 #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"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/spiram.h"
+#include "esp32s3/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;
 
+//allows user to bypass SPI RAM test routine
+__attribute__((weak)) bool testSPIRAM(void) 
+{ 
+     return esp_spiram_test(); 
+}
+
+
 bool psramInit(){
     if (spiramDetected) {
         return true;
@@ -17,22 +53,33 @@ 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 || pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4) {
+    if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 || pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2) {
         spiramFailed = true;
         log_w("PSRAM not supported!");
         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!");
-        pinMatrixOutDetach(16, false, false);
-        pinMatrixOutDetach(17, false, false);
+#if CONFIG_IDF_TARGET_ESP32
+        if (pkg_ver != EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4) {
+            pinMatrixOutDetach(16, false, false);
+            pinMatrixOutDetach(17, false, false);
+        }
+#endif
         return false;
     }
-    if (!esp_spiram_test()) {
+    esp_spiram_init_cache();
+    //testSPIRAM() allows user to bypass SPI RAM test routine
+    if (!testSPIRAM()) {
         spiramFailed = true;
         log_e("PSRAM test failed!");
         return false;
@@ -42,31 +89,34 @@ bool psramInit(){
         log_e("PSRAM could not be added to the heap!");
         return false;
     }
+#if CONFIG_SPIRAM_USE_MALLOC && !CONFIG_ARDUINO_ISR_IRAM
+    heap_caps_malloc_extmem_enable(CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL);
 #endif
+#endif /* CONFIG_SPIRAM_BOOT_INIT */
+    log_i("PSRAM enabled");
     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 +129,19 @@ 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

@@ -0,0 +1,634 @@
+// Copyright 2018 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 "driver/rmt.h"
+
+/**
+ * Internal macros
+ */
+
+#define MAX_CHANNELS                        (SOC_RMT_GROUPS * SOC_RMT_CHANNELS_PER_GROUP)
+
+#define RMT_TX_CH_START       (0)
+#define RMT_TX_CH_END         (SOC_RMT_TX_CANDIDATES_PER_GROUP - 1)
+#define RMT_RX_CH_START       (SOC_RMT_CHANNELS_PER_GROUP - SOC_RMT_TX_CANDIDATES_PER_GROUP)
+#define RMT_RX_CH_END         (SOC_RMT_CHANNELS_PER_GROUP - 1)
+
+#define _LIMIT(a,b) (a>b?b:a)
+
+#if CONFIG_DISABLE_HAL_LOCKS
+# define RMT_MUTEX_LOCK(channel)
+# define RMT_MUTEX_UNLOCK(channel)
+#else
+# define RMT_MUTEX_LOCK(channel)    do {} while (xSemaphoreTake(g_rmt_objlocks[channel], portMAX_DELAY) != pdPASS)
+# define RMT_MUTEX_UNLOCK(channel)  xSemaphoreGive(g_rmt_objlocks[channel])
+#endif /* CONFIG_DISABLE_HAL_LOCKS */
+
+//#define _RMT_INTERNAL_DEBUG
+#ifdef _RMT_INTERNAL_DEBUG
+# define DEBUG_INTERRUPT_START(pin)    digitalWrite(pin, 1);
+# define DEBUG_INTERRUPT_END(pin)      digitalWrite(pin, 0);
+#else
+# define DEBUG_INTERRUPT_START(pin)
+# define DEBUG_INTERRUPT_END(pin)
+#endif /* _RMT_INTERNAL_DEBUG */
+
+#define RMT_DEFAULT_ARD_CONFIG_TX(gpio, channel_id, buffers)      \
+    {                                                \
+        .rmt_mode = RMT_MODE_TX,                     \
+        .channel = channel_id,                       \
+        .gpio_num = gpio,                            \
+        .clk_div = 1,                                \
+        .mem_block_num = buffers,                    \
+        .flags = 0,                                  \
+        .tx_config = {                               \
+            .carrier_level = RMT_CARRIER_LEVEL_HIGH, \
+            .idle_level = RMT_IDLE_LEVEL_LOW,        \
+            .carrier_duty_percent = 50,              \
+            .carrier_en = false,                     \
+            .loop_en = false,                        \
+            .idle_output_en = true,                  \
+        }                                            \
+    }
+
+#define RMT_DEFAULT_ARD_CONFIG_RX(gpio, channel_id, buffers) \
+    {                                           \
+        .rmt_mode = RMT_MODE_RX,                \
+        .channel = channel_id,                  \
+        .gpio_num = gpio,                       \
+        .clk_div = 1,                           \
+        .mem_block_num = buffers,               \
+        .flags = 0,                             \
+        .rx_config = {                          \
+            .idle_threshold = 0x80,             \
+            .filter_ticks_thresh = 100,         \
+            .filter_en = false,                 \
+        }                                       \
+    }
+
+
+
+
+/**
+ * Typedefs for internal stuctures, enums
+ */
+struct rmt_obj_s
+{
+    bool allocated;
+    EventGroupHandle_t events;
+    int channel;
+    int buffers;
+    int data_size;
+    uint32_t* data_ptr;
+    rmt_rx_data_cb_t cb;
+    void * arg;
+    TaskHandle_t rxTaskHandle;  
+    bool rx_completed;
+    bool tx_not_rx;
+};
+
+/**
+ * Internal variables for channel descriptors
+ */
+static xSemaphoreHandle g_rmt_objlocks[MAX_CHANNELS] = {
+    NULL, NULL, NULL, NULL, 
+#if MAX_CHANNELS > 4
+    NULL, NULL, NULL, NULL
+#endif
+};
+
+static rmt_obj_t g_rmt_objects[MAX_CHANNELS] = {
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+#if MAX_CHANNELS > 4
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+    { false, NULL, 0, 0, 0, NULL, NULL, NULL, NULL, true, true},
+#endif
+};
+
+/**
+ * Internal variables for driver data
+ */
+static xSemaphoreHandle g_rmt_block_lock = NULL;
+
+/**
+ * Internal method (private) declarations
+ */
+
+static rmt_obj_t* _rmtAllocate(int pin, int from, int size)
+{
+    size_t i;
+    // setup how many buffers shall we use
+    g_rmt_objects[from].buffers = size;
+
+    for (i=0; i<size; i++) {
+        // mark the block of channels as used
+        g_rmt_objects[i+from].allocated = true;
+    }
+    return &(g_rmt_objects[from]);
+}
+
+void _rmtDumpStatus(rmt_obj_t* rmt) 
+{
+   bool loop_en;
+   uint8_t div_cnt;
+   uint8_t memNum;
+   bool lowPowerMode;
+   rmt_mem_owner_t owner;
+   uint16_t idleThreshold;
+   uint32_t status;
+   rmt_source_clk_t srcClk;
+   rmt_channel_t channel = rmt->channel;
+
+RMT_MUTEX_LOCK(channel);
+   rmt_get_tx_loop_mode(channel, &loop_en);
+   rmt_get_clk_div(channel, &div_cnt);
+   rmt_get_mem_block_num(channel, &memNum);
+   rmt_get_mem_pd(channel, &lowPowerMode);
+   rmt_get_memory_owner(channel, &owner);
+   rmt_get_rx_idle_thresh(channel, &idleThreshold);
+   rmt_get_status(channel, &status);
+   rmt_get_source_clk(channel, &srcClk);
+
+   log_d("Status for RMT channel %d", channel);
+   log_d("- Loop enabled: %d", loop_en);
+   log_d("- Clock divisor: %d", div_cnt);
+   log_d("- Number of memory blocks: %d", memNum);
+   log_d("- Low power mode: %d", lowPowerMode);
+   log_d("- Memory owner: %s", owner==RMT_MEM_OWNER_TX?"TX":"RX");
+   log_d("- Idle threshold: %d", idleThreshold);
+   log_d("- Status: %d", status);
+   log_d("- Source clock: %s", srcClk==RMT_BASECLK_APB?"APB (80MHz)":"1MHz");
+RMT_MUTEX_UNLOCK(channel);
+}
+
+static void _rmtRxTask(void *args) {
+    rmt_obj_t *rmt = (rmt_obj_t *) args;
+    RingbufHandle_t rb = NULL;
+    size_t rmt_len = 0;
+    rmt_item32_t *data = NULL;
+
+    if (!rmt) {
+        log_e(" -- Inavalid Argument");
+        goto err;
+    }
+
+    int channel = rmt->channel;
+    rmt_get_ringbuf_handle(channel, &rb);
+    if (!rb) {
+        log_e(" -- Failed to get RMT ringbuffer handle");
+        goto err;  
+    }
+    
+    for(;;) {
+        data = (rmt_item32_t *) xRingbufferReceive(rb, &rmt_len, portMAX_DELAY);
+        if (data) {
+            log_d(" -- Got %d bytes on RX Ringbuffer - CH %d", rmt_len, rmt->channel);
+            rmt->rx_completed = true;  // used in rmtReceiveCompleted()
+            // callback
+            if (rmt->cb) {
+                (rmt->cb)((uint32_t *)data, rmt_len / sizeof(rmt_item32_t), rmt->arg);
+            } else {
+                // stop RX -- will force a correct call with a callback pointer / new rmtReadData() / rmtReadAsync()
+                rmt_rx_stop(channel);
+            }
+            // Async Read -- copy data to caller
+            if (rmt->data_ptr && rmt->data_size) {
+                uint32_t data_size = rmt->data_size;
+                uint32_t read_len = rmt_len / sizeof(rmt_item32_t);
+                if (read_len < rmt->data_size) data_size = read_len;
+                rmt_item32_t *p = (rmt_item32_t *)rmt->data_ptr;
+                for (uint32_t i = 0; i < data_size; i++) {
+                    p[i] = data[i];
+                }
+            }
+            // set events
+            if (rmt->events) {
+                xEventGroupSetBits(rmt->events, RMT_FLAG_RX_DONE);
+            }
+            vRingbufferReturnItem(rb, (void *) data);
+        } // xRingbufferReceive
+    } // for(;;)
+
+err:
+  vTaskDelete(NULL);    
+}
+
+
+static bool _rmtCreateRxTask(rmt_obj_t* rmt) 
+{
+    if (!rmt) {
+        return false;
+    }
+    if (rmt->rxTaskHandle) {   // Task already created
+        return false;
+    }
+
+    xTaskCreate(_rmtRxTask, "rmt_rx_task", 4096, rmt, 20, &rmt->rxTaskHandle);
+
+    if(rmt->rxTaskHandle == NULL){
+        log_e("RMT RX Task create failed");
+        return false;
+    }
+    return true;
+}
+
+// Helper function to test if an RMT channel is correctly assigned to TX or RX, issuing an error message if necessary
+// Also test RMT pointer for NULL and returns false in case it is NULL
+// return true when it is correctly assigned, false otherwise
+static bool _rmtCheckTXnotRX(rmt_obj_t* rmt, bool tx_not_rx)
+{
+    if (!rmt) {           // also returns false on NULL
+        return false;
+    }
+
+    if (rmt->tx_not_rx == tx_not_rx) {  // matches expected RX/TX channel
+        return true;
+    }
+   
+    if (tx_not_rx) {    // expected TX channel
+        log_e("Can't write on a RX RMT Channel");
+    } else{             // expected RX channel
+        log_e("Can't read on a TX RMT Channel");
+    }
+    return false;       // missmatched
+}
+
+/**
+ * Public method definitions
+ */
+
+bool rmtSetCarrier(rmt_obj_t* rmt, bool carrier_en, bool carrier_level, uint32_t low, uint32_t high)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_TX_MODE) || low > 0xFFFF || high > 0xFFFF) {
+        return false;
+    }
+    size_t channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    rmt_set_tx_carrier(channel, carrier_en, high, low, carrier_level);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtSetFilter(rmt_obj_t* rmt, bool filter_en, uint32_t filter_level)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE) || filter_level > 0xFF) {
+        return false;
+    }
+    size_t channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    rmt_set_rx_filter(channel, filter_en, filter_level);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtSetRxThreshold(rmt_obj_t* rmt, uint32_t value)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE) || value > 0xFFFF) {
+        return false;
+    }
+    size_t channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    rmt_set_rx_idle_thresh(channel, value);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+
+bool rmtDeinit(rmt_obj_t *rmt)
+{
+    if (!rmt) {
+        return false;
+    }
+
+    // sanity check
+    if (rmt != &(g_rmt_objects[rmt->channel])) {
+        return false;
+    }
+
+    RMT_MUTEX_LOCK(rmt->channel);
+    // force stopping rmt processing
+    if (rmt->tx_not_rx) {
+        rmt_tx_stop(rmt->channel);
+    } else {
+        rmt_rx_stop(rmt->channel);
+        if(rmt->rxTaskHandle){
+            vTaskDelete(rmt->rxTaskHandle);
+            rmt->rxTaskHandle = NULL;
+        }       
+    }
+
+    rmt_driver_uninstall(rmt->channel);
+
+    size_t from = rmt->channel;
+    size_t to = rmt->buffers + rmt->channel;
+    size_t i;
+
+    for (i = from; i < to; i++) {
+        g_rmt_objects[i].allocated = false;
+    }
+
+    g_rmt_objects[from].channel = 0;
+    g_rmt_objects[from].buffers = 0;
+    RMT_MUTEX_UNLOCK(rmt->channel);
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(g_rmt_objlocks[from] != NULL) {
+        vSemaphoreDelete(g_rmt_objlocks[from]);
+        g_rmt_objlocks[from] = NULL;
+    }
+#endif
+
+    return true;
+}
+
+bool rmtLoop(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_TX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+    RMT_MUTEX_LOCK(channel);
+    rmt_tx_stop(channel);
+    rmt_set_tx_loop_mode(channel, true);
+    rmt_write_items(channel, (const rmt_item32_t *)data, size, false);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_TX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+    RMT_MUTEX_LOCK(channel);
+    rmt_tx_stop(channel);
+    rmt_set_tx_loop_mode(channel, false);
+    rmt_write_items(channel, (const rmt_item32_t *)data, size, false);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtWriteBlocking(rmt_obj_t* rmt, rmt_data_t* data, size_t size)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_TX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+    RMT_MUTEX_LOCK(channel);
+    rmt_tx_stop(channel);
+    rmt_set_tx_loop_mode(channel, false);
+    rmt_write_items(channel, (const rmt_item32_t *)data, size, true);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtReadData(rmt_obj_t* rmt, uint32_t* data, size_t size)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE)) {
+        return false;
+    }
+    rmtReadAsync(rmt, (rmt_data_t*) data, size, NULL, false, 0);
+    return true;
+}
+
+
+bool rmtBeginReceive(rmt_obj_t* rmt)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    rmt_set_memory_owner(channel, RMT_MEM_OWNER_RX);
+    rmt_rx_start(channel, true);
+    rmt->rx_completed = false;
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtReceiveCompleted(rmt_obj_t* rmt)
+{
+    if (!rmt) {
+        return false;
+    }
+
+    return rmt->rx_completed;
+}
+
+bool rmtRead(rmt_obj_t* rmt, rmt_rx_data_cb_t cb, void * arg)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+
+    rmt->arg = arg;
+    rmt->cb = cb;
+
+    RMT_MUTEX_LOCK(channel);
+    // cb as NULL is a way to cancel the callback process
+    if (cb == NULL) {        
+        rmt_rx_stop(channel);
+        return true;
+    }
+    // Start a read process but now with a call back function
+    rmt_set_memory_owner(channel, RMT_MEM_OWNER_RX);
+    rmt_rx_start(channel, true);
+    rmt->rx_completed = false;
+    _rmtCreateRxTask(rmt);
+    RMT_MUTEX_UNLOCK(channel);
+    return true;
+}
+
+bool rmtEnd(rmt_obj_t* rmt) 
+{
+    if (!rmt) {
+        return false;
+    }
+    int channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    if (rmt->tx_not_rx) {
+        rmt_tx_stop(channel);
+    } else {
+        rmt_rx_stop(channel);
+        rmt->rx_completed = true;
+    }
+    RMT_MUTEX_UNLOCK(channel);
+    return  true;
+}
+
+bool rmtReadAsync(rmt_obj_t* rmt, rmt_data_t* data, size_t size, void* eventFlag, bool waitForData, uint32_t timeout)
+{
+    if (!_rmtCheckTXnotRX(rmt, RMT_RX_MODE)) {
+        return false;
+    }
+    int channel = rmt->channel;
+
+    // No limit on size with IDF ;-)
+    //if (g_rmt_objects[channel].buffers < size/SOC_RMT_MEM_WORDS_PER_CHANNEL) {
+    //    return false;
+    //}
+
+    RMT_MUTEX_LOCK(channel);
+    if (eventFlag) {
+        xEventGroupClearBits(eventFlag, RMT_FLAGS_ALL);
+    }
+    // if NULL, no problems - rmtReadAsync works as a plain rmtReadData()
+    rmt->events = eventFlag;  
+
+    // if NULL, no problems - task will take care of it
+    rmt->data_ptr = (uint32_t*)data;
+    rmt->data_size = size;
+ 
+    // Start a read process
+    rmt_set_memory_owner(channel, RMT_MEM_OWNER_RX); 
+    rmt_rx_start(channel, true);
+    rmt->rx_completed = false;
+    _rmtCreateRxTask(rmt);
+    RMT_MUTEX_UNLOCK(channel);
+
+    // wait for data if requested so
+    if (waitForData && eventFlag) {
+        xEventGroupWaitBits(eventFlag, RMT_FLAGS_ALL,
+                            pdTRUE /* clear on exit */, pdFALSE /* wait for all bits */, timeout);
+    }
+    return true;
+}
+
+float rmtSetTick(rmt_obj_t* rmt, float tick)
+{
+    if (!rmt) {
+        return false;
+    }    
+    size_t channel = rmt->channel;
+
+    RMT_MUTEX_LOCK(channel);
+    // RMT_BASECLK_REF (1MHz) is not supported in IDF upon Programmming Guide
+    // Only APB works
+    rmt_set_source_clk(channel, RMT_BASECLK_APB);   
+    int apb_div = _LIMIT(tick/12.5f, 256);
+    float apb_tick = 12.5f * apb_div;
+    
+    rmt_set_clk_div(channel, apb_div & 0xFF);
+    RMT_MUTEX_UNLOCK(channel);
+    return apb_tick;
+}
+
+rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize)
+{
+    int buffers = memsize;
+    rmt_obj_t* rmt = NULL;
+    size_t i = 0;
+    size_t j = 0;
+
+    // create common block mutex for protecting allocs from multiple threads
+    if (!g_rmt_block_lock) {
+        g_rmt_block_lock = xSemaphoreCreateMutex();
+    }
+    // lock
+    while (xSemaphoreTake(g_rmt_block_lock, portMAX_DELAY) != pdPASS) {}
+
+    // Some SoC may have fixed channel numbers for TX and RX - example: ESP32C3
+    uint8_t ch_start, ch_end;
+    if (tx_not_rx) {
+        ch_start = RMT_TX_CH_START;
+        ch_end = RMT_TX_CH_END;
+    } else {
+        ch_start = RMT_RX_CH_START;
+        ch_end = RMT_RX_CH_END;
+    }
+    for (i=ch_start; i<=ch_end; i++) {
+        for (j=0; j<buffers && i+j <= ch_end; j++) {
+            // if the space is ocupied break and continue on other channel
+            if (g_rmt_objects[i+j].allocated) {
+                i += j; // continue searching from latter channel
+                break;
+            }
+        }
+        if (j == buffers) {
+            // found a space in channel descriptors
+            break;
+        }
+    }
+    if (i == MAX_CHANNELS || i+j > MAX_CHANNELS || j != buffers)  {
+        xSemaphoreGive(g_rmt_block_lock);
+        log_e("rmInit Failed - not enough channels");
+        return NULL;
+    }
+    
+    // A suitable channel has been found, it has to block its resources in our internal data strucuture
+    size_t channel = i;
+    rmt = _rmtAllocate(pin, i, buffers);
+
+    xSemaphoreGive(g_rmt_block_lock);
+
+    rmt->buffers = buffers;
+    rmt->channel = channel;
+    rmt->arg = NULL;
+    rmt->cb = NULL;
+    rmt->data_ptr = NULL;
+    rmt->data_size = 0;
+    rmt->rx_completed = false;
+    rmt->events = NULL;
+    rmt->tx_not_rx = tx_not_rx;
+
+#if !CONFIG_DISABLE_HAL_LOCKS
+    if(g_rmt_objlocks[channel] == NULL) {
+        g_rmt_objlocks[channel] = xSemaphoreCreateMutex();
+        if(g_rmt_objlocks[channel] == NULL) {
+            return NULL;
+        }
+    }
+#endif
+
+    RMT_MUTEX_LOCK(channel);
+    esp_err_t esp_err_code = ESP_OK;
+
+    if (tx_not_rx) {
+        rmt_config_t config = RMT_DEFAULT_ARD_CONFIG_TX(pin, channel, buffers);
+        esp_err_code = rmt_config(&config);
+        if (esp_err_code == ESP_OK) 
+            esp_err_code = rmt_driver_install(channel, 0, 0);
+        log_d(" -- %s RMT - CH %d - %d RAM Blocks - pin %d", tx_not_rx?"TX":"RX", channel, buffers, pin);
+    } else {
+        rmt_config_t config = RMT_DEFAULT_ARD_CONFIG_RX(pin, channel, buffers);
+        esp_err_code = rmt_config(&config);
+        if (esp_err_code == ESP_OK) 
+            esp_err_code = rmt_driver_install(channel, 1024, 0);
+        if (esp_err_code == ESP_OK) 
+            esp_err_code = rmt_set_memory_owner(channel, RMT_MEM_OWNER_RX);
+        log_d(" -- %s RMT - CH %d - %d RAM Blocks - pin %d", tx_not_rx?"TX":"RX", channel, buffers, pin);
+    } 
+
+    RMT_MUTEX_UNLOCK(channel);
+
+    if (esp_err_code == ESP_OK) {
+        return rmt;
+    } else {
+        log_e("RMT failed to initilize.");
+        return NULL;
+    }
+}

cores/esp32/esp32-hal-rmt.h

@@ -0,0 +1,169 @@
+// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef MAIN_ESP32_HAL_RMT_H_
+#define MAIN_ESP32_HAL_RMT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// notification flags
+#define RMT_FLAG_TX_DONE     (1)
+#define RMT_FLAG_RX_DONE     (2)
+#define RMT_FLAG_ERROR       (4)
+#define RMT_FLAGS_ALL        (RMT_FLAG_TX_DONE | RMT_FLAG_RX_DONE | RMT_FLAG_ERROR)
+
+#define RMT_TX_MODE      true
+#define RMT_RX_MODE      false
+
+struct rmt_obj_s;
+
+typedef enum {
+    RMT_MEM_64 =  1,
+    RMT_MEM_128 = 2,
+    RMT_MEM_192 = 3,
+    RMT_MEM_256 = 4,
+    RMT_MEM_320 = 5,
+    RMT_MEM_384 = 6,
+    RMT_MEM_448 = 7,
+    RMT_MEM_512 = 8,
+} rmt_reserve_memsize_t;
+
+typedef struct rmt_obj_s rmt_obj_t;
+
+typedef void (*rmt_rx_data_cb_t)(uint32_t *data, size_t len, void *arg);
+
+typedef struct {
+    union {
+        struct {
+            uint32_t duration0 :15;
+            uint32_t level0 :1;
+            uint32_t duration1 :15;
+            uint32_t level1 :1;
+        };
+        uint32_t val;
+    };
+} rmt_data_t;
+
+
+/**
+*    Prints object information
+*
+*/
+void _rmtDumpStatus(rmt_obj_t* rmt);
+
+/**
+*    Initialize the object
+*
+*/
+rmt_obj_t* rmtInit(int pin, bool tx_not_rx, rmt_reserve_memsize_t memsize);
+
+/**
+*    Sets the clock/divider of timebase the nearest tick to the supplied value in nanoseconds
+*    return the real actual tick value in ns
+*/
+float rmtSetTick(rmt_obj_t* rmt, float tick);
+
+/**
+*    Sending data in one-go mode or continual mode
+*     (more data being send while updating buffers in interrupts)
+*    Non-Blocking mode - returns right after executing
+*/
+bool rmtWrite(rmt_obj_t* rmt, rmt_data_t* data, size_t size);
+
+/**
+*    Sending data in one-go mode or continual mode
+*     (more data being send while updating buffers in interrupts)
+*    Blocking mode - only returns when data has been sent
+*/
+bool rmtWriteBlocking(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
+*
+*/
+bool rmtReadAsync(rmt_obj_t* rmt, rmt_data_t* data, size_t size, void* eventFlag, bool waitForData, uint32_t timeout);
+
+/**
+*    Initiates async receive with automatic buffering
+*    and callback with data from ISR
+*
+*/
+bool rmtRead(rmt_obj_t* rmt, rmt_rx_data_cb_t cb, void * arg);
+
+/***
+ * Ends async receive started with rmtRead(); but does not
+ * rmtDeInit().
+ */
+bool rmtEnd(rmt_obj_t* rmt);
+
+/*  Additional interface */
+
+/**
+*    Start reception
+*
+*/
+bool rmtBeginReceive(rmt_obj_t* rmt);
+
+/**
+*    Checks if reception completes
+*
+*/
+bool rmtReceiveCompleted(rmt_obj_t* rmt);
+
+/**
+*    Reads the data for particular channel
+*
+*/
+bool rmtReadData(rmt_obj_t* rmt, uint32_t* data, size_t size);
+
+/**
+ * Setting threshold for Rx completed
+ */
+bool rmtSetRxThreshold(rmt_obj_t* rmt, uint32_t value);
+
+/**
+ * Setting carrier
+ */
+bool rmtSetCarrier(rmt_obj_t* rmt, bool carrier_en, bool carrier_level, uint32_t low, uint32_t high);
+
+/**
+ * Setting input filter
+ */
+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
+//  * send only-conti mode with circular-buffer
+//  * put sanity checks to some macro or inlines
+//  * doxy comments
+//  * error reporting
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAIN_ESP32_HAL_RMT_H_ */

cores/esp32/esp32-hal-sigmadelta.c

@@ -12,81 +12,78 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+
+
 #include "esp32-hal.h"
-#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 "soc/soc_caps.h"
+#include "driver/sigmadelta.h"
 
+static uint8_t duty_set[SOC_SIGMADELTA_CHANNEL_NUM] = {0};
+static uint32_t prescaler_set[SOC_SIGMADELTA_CHANNEL_NUM] = {0};
 
-#if CONFIG_DISABLE_HAL_LOCKS
-#define SD_MUTEX_LOCK()
-#define SD_MUTEX_UNLOCK()
-#else
-#define SD_MUTEX_LOCK()    do {} while (xSemaphoreTake(_sd_sys_lock, portMAX_DELAY) != pdPASS)
-#define SD_MUTEX_UNLOCK()  xSemaphoreGive(_sd_sys_lock)
-xSemaphoreHandle _sd_sys_lock;
-#endif
+static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
+    if(old_apb == new_apb){
+        return;
+    }
+    uint32_t iarg = (uint32_t)arg;
+    uint8_t channel = iarg;
+    if(ev_type == APB_AFTER_CHANGE){
+        old_apb /= 1000000;
+        new_apb /= 1000000;
+        uint32_t old_prescale = prescaler_set[channel] + 1;
+        uint32_t new_prescale = ((new_apb * old_prescale) / old_apb) - 1;
+        sigmadelta_set_prescale(channel,new_prescale);
+        prescaler_set[channel] = new_prescale;
+    }
+}
 
-uint32_t sigmaDeltaSetup(uint8_t channel, uint32_t freq) //chan 0-7 freq 1220-312500
+uint32_t sigmaDeltaSetup(uint8_t pin, uint8_t channel, uint32_t freq) //chan 0-x according to SOC, freq 1220-312500
 {
-    if(channel > 7) {
+    if(channel >= SOC_SIGMADELTA_CHANNEL_NUM){
         return 0;
     }
-#if !CONFIG_DISABLE_HAL_LOCKS
-    static bool tHasStarted = false;
-    if(!tHasStarted) {
-        tHasStarted = true;
-        _sd_sys_lock = xSemaphoreCreateMutex();
-    }
-#endif
-    uint32_t prescale = (10000000/(freq*32)) - 1;
+    
+    uint32_t apb_freq = getApbFrequency();
+    uint32_t prescale = (apb_freq/(freq*256)) - 1;
     if(prescale > 0xFF) {
         prescale = 0xFF;
     }
-    SD_MUTEX_LOCK();
-    SIGMADELTA.channel[channel].prescale = prescale;
-    SIGMADELTA.cg.clk_en = 0;
-    SIGMADELTA.cg.clk_en = 1;
-    SD_MUTEX_UNLOCK();
-    return 10000000/((prescale + 1) * 32);
+
+    sigmadelta_config_t sigmadelta_cfg = {
+        .channel = channel,
+        .sigmadelta_prescale = prescale,
+        .sigmadelta_duty = 0,
+        .sigmadelta_gpio = pin,
+    };
+    sigmadelta_config(&sigmadelta_cfg);
+
+    prescaler_set[channel] = prescale;
+    uint32_t iarg = channel;
+    addApbChangeCallback((void*)iarg, _on_apb_change);
+
+    return apb_freq/((prescale + 1) * 256);
 }
 
-void sigmaDeltaWrite(uint8_t channel, uint8_t duty) //chan 0-7 duty 8 bit
+void sigmaDeltaWrite(uint8_t channel, uint8_t duty) //chan 0-x according to SOC duty 8 bit
 {
-    if(channel > 7) {
+    if(channel >= SOC_SIGMADELTA_CHANNEL_NUM){
         return;
     }
-    duty -= 128;
-    SD_MUTEX_LOCK();
-    SIGMADELTA.channel[channel].duty = duty;
-    SD_MUTEX_UNLOCK();
+    duty -= 128; 
+
+    sigmadelta_set_duty(channel,duty);
+    duty_set[channel] = duty;
 }
 
-uint8_t sigmaDeltaRead(uint8_t channel) //chan 0-7
+uint8_t sigmaDeltaRead(uint8_t channel) //chan 0-x according to SOC
 {
-    if(channel > 7) {
+    if(channel >= SOC_SIGMADELTA_CHANNEL_NUM){
         return 0;
     }
-    SD_MUTEX_LOCK();
-    uint8_t duty = SIGMADELTA.channel[channel].duty + 128;
-    SD_MUTEX_UNLOCK();
-    return duty;
-}
-
-void sigmaDeltaAttachPin(uint8_t pin, uint8_t channel) //channel 0-7
-{
-    if(channel > 7) {
-        return;
-    }
-    pinMode(pin, OUTPUT);
-    pinMatrixOutAttach(pin, GPIO_SD0_OUT_IDX + channel, false, false);
+    return duty_set[channel]+128;
 }
 
 void sigmaDeltaDetachPin(uint8_t pin)
 {
     pinMatrixOutDetach(pin, false, false);
-}
+}

cores/esp32/esp32-hal-sigmadelta.h

@@ -23,10 +23,9 @@ extern "C" {
 #include <stdbool.h>
 
 //channel 0-7 freq 1220-312500 duty 0-255
-uint32_t    sigmaDeltaSetup(uint8_t channel, uint32_t freq);
+uint32_t    sigmaDeltaSetup(uint8_t pin, uint8_t channel, uint32_t freq);
 void        sigmaDeltaWrite(uint8_t channel, uint8_t duty);
 uint8_t     sigmaDeltaRead(uint8_t channel);
-void        sigmaDeltaAttachPin(uint8_t pin, uint8_t channel);
 void        sigmaDeltaDetachPin(uint8_t pin);
 
 

cores/esp32/esp32-hal-spi.h

@@ -19,14 +19,22 @@
 extern "C" {
 #endif
 
+#include "sdkconfig.h"
 #include <stdint.h>
 #include <stdbool.h>
 
 #define SPI_HAS_TRANSACTION
 
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+#define FSPI  0
+#define HSPI  1
+#else
 #define FSPI  1 //SPI bus attached to the flash (can use the same data lines but different SS)
 #define HSPI  2 //SPI bus normally mapped to pins 12 - 15, but can be matrixed to any pins
+#if CONFIG_IDF_TARGET_ESP32
 #define VSPI  3 //SPI bus normally attached to pins 5, 18, 19 and 23, but can be matrixed to any pins
+#endif
+#endif
 
 // This defines are not representing the real Divider of the ESP32
 // the Defines match to an AVR Arduino on 16MHz for better compatibility
@@ -54,7 +62,7 @@ extern "C" {
 struct spi_struct_t;
 typedef struct spi_struct_t spi_t;
 
-spi_t * spiStartBus(uint8_t spi_num, uint32_t freq, uint8_t dataMode, uint8_t bitOrder);
+spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder);
 void spiStopBus(spi_t * spi);
 
 //Attach/Detach Signal Pins
@@ -96,7 +104,7 @@ 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 +113,7 @@ 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 +123,11 @@ 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

@@ -13,13 +13,15 @@
 // limitations under the License.
 
 #include "esp32-hal.h"
-#include "apps/sntp/sntp.h"
+#include "lwip/apps/sntp.h"
+//#include "tcpip_adapter.h"
+#include "esp_netif.h"
 
 static void setTimeZone(long offset, int daylight)
 {
-    char cst[16] = {0};
-    char cdt[16] = "DST";
-    char tz[32] = {0};
+    char cst[17] = {0};
+    char cdt[17] = "DST";
+    char tz[33] = {0};
 
     if(offset % 3600){
         sprintf(cst, "UTC%ld:%02u:%02u", offset / 3600, abs((offset % 3600) / 60), abs(offset % 60));
@@ -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;
-
-    time(&now);
-    localtime_r(&now, info);
-
-    if(info->tm_year > (2016 - 1900)){
-        return true;
-    }
-
-    while(count--) {
-        delay(10);
+    while((millis()-start) <= ms) {
         time(&now);
         localtime_r(&now, info);
         if(info->tm_year > (2016 - 1900)){
             return true;
         }
+        delay(10);
     }
     return false;
 }

cores/esp32/esp32-hal-timer.c

@@ -13,255 +13,227 @@
 // limitations under the License.
 
 #include "esp32-hal-timer.h"
-#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 "esp_intr.h"
+#include "driver/timer.h"
+#include "soc/soc_caps.h"
 
-#define HWTIMER_LOCK()      portENTER_CRITICAL(timer->lock)
-#define HWTIMER_UNLOCK()    portEXIT_CRITICAL(timer->lock)
+typedef union {
+    struct {
+        uint32_t reserved0:   10;
+        uint32_t alarm_en:     1;             /*When set  alarm is enabled*/
+        uint32_t level_int_en: 1;             /*When set  level type interrupt will be generated during alarm*/
+        uint32_t edge_int_en:  1;             /*When set  edge type interrupt will be generated during alarm*/
+        uint32_t divider:     16;             /*Timer clock (T0/1_clk) pre-scale value.*/
+        uint32_t autoreload:   1;             /*When set  timer 0/1 auto-reload at alarming is enabled*/
+        uint32_t increase:     1;             /*When set  timer 0/1 time-base counter increment. When cleared timer 0 time-base counter decrement.*/
+        uint32_t enable:       1;             /*When set timer 0/1 time-base counter is enabled*/
+    };
+    uint32_t val;
+} timer_cfg_t;
+
+#define NUM_OF_TIMERS   SOC_TIMER_GROUP_TOTAL_TIMERS
 
 typedef struct {
-    union {
-        struct {
-            uint32_t reserved0:   10;
-            uint32_t alarm_en:     1;             /*When set  alarm is enabled*/
-            uint32_t level_int_en: 1;             /*When set  level type interrupt will be generated during alarm*/
-            uint32_t edge_int_en:  1;             /*When set  edge type interrupt will be generated during alarm*/
-            uint32_t divider:     16;             /*Timer clock (T0/1_clk) pre-scale value.*/
-            uint32_t autoreload:   1;             /*When set  timer 0/1 auto-reload at alarming is enabled*/
-            uint32_t increase:     1;             /*When set  timer 0/1 time-base counter increment. When cleared timer 0 time-base counter decrement.*/
-            uint32_t enable:       1;             /*When set  timer 0/1 time-base counter is enabled*/
-        };
-        uint32_t val;
-    } config;
-    uint32_t cnt_low;                             /*Register to store timer 0/1 time-base counter current value lower 32 bits.*/
-    uint32_t cnt_high;                            /*Register to store timer 0 time-base counter current value higher 32 bits.*/
-    uint32_t update;                              /*Write any value will trigger a timer 0 time-base counter value update (timer 0 current value will be stored in registers above)*/
-    uint32_t alarm_low;                           /*Timer 0 time-base counter value lower 32 bits that will trigger the alarm*/
-    uint32_t alarm_high;                          /*Timer 0 time-base counter value higher 32 bits that will trigger the alarm*/
-    uint32_t load_low;                            /*Lower 32 bits of the value that will load into timer 0 time-base counter*/
-    uint32_t load_high;                           /*higher 32 bits of the value that will load into timer 0 time-base counter*/
-    uint32_t reload;                              /*Write any value will trigger timer 0 time-base counter reload*/
-} hw_timer_reg_t;
+    int timer_group;
+    int timer_idx;
+    int alarm_interval;
+    bool auto_reload;
+} timer_info_t;
 
-typedef struct hw_timer_s {
-        hw_timer_reg_t * dev;
-        uint8_t num;
-        uint8_t group;
-        uint8_t timer;
-        portMUX_TYPE lock;
+typedef struct hw_timer_s
+{
+    uint8_t group;
+    uint8_t num;
 } hw_timer_t;
 
-static hw_timer_t hw_timer[4] = {
-        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE),0,0,0,portMUX_INITIALIZER_UNLOCKED},
-        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x0024),1,0,1,portMUX_INITIALIZER_UNLOCKED},
-        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x1000),2,1,0,portMUX_INITIALIZER_UNLOCKED},
-        {(hw_timer_reg_t *)(DR_REG_TIMERGROUP0_BASE + 0x1024),3,1,1,portMUX_INITIALIZER_UNLOCKED}
+// Works for all chips
+static hw_timer_t timer_dev[4] = {
+    {0,0}, {1,0},  {1,0},  {1,1}
 };
 
-typedef void (*voidFuncPtr)(void);
-static voidFuncPtr __timerInterruptHandlers[4] = {0,0,0,0};
+// NOTE: (in IDF 5.0 there wont be need to know groups/numbers 
+// timer_init() will list thru all timers and return free timer handle)
 
-void IRAM_ATTR __timerISR(void * arg){
-    uint32_t s0 = TIMERG0.int_st_timers.val;
-    uint32_t s1 = TIMERG1.int_st_timers.val;
-    TIMERG0.int_clr_timers.val = s0;
-    TIMERG1.int_clr_timers.val = s1;
-    uint8_t status = (s1 & 3) << 2 | (s0 & 3);
-    uint8_t i = 4;
-    //restart the timers that should autoreload
-    while(i--){
-        hw_timer_reg_t * dev = hw_timer[i].dev;
-        if((status & (1 << i)) && dev->config.autoreload){
-            dev->config.alarm_en = 1;
-        }
-    }
-    i = 4;
-    //call callbacks
-    while(i--){
-        if(__timerInterruptHandlers[i] && status & (1 << i)){
-            __timerInterruptHandlers[i]();
-        }
-    }
-}
 
-uint64_t timerRead(hw_timer_t *timer){
-    timer->dev->update = 1;
-    uint64_t h = timer->dev->cnt_high;
-    uint64_t l = timer->dev->cnt_low;
-    return (h << 32) | l;
+uint64_t inline timerRead(hw_timer_t *timer){
+
+    uint64_t value;
+    timer_get_counter_value(timer->group, timer->num,&value);
+    return value;
 }
 
 uint64_t timerAlarmRead(hw_timer_t *timer){
-    uint64_t h = timer->dev->alarm_high;
-    uint64_t l = timer->dev->alarm_low;
-    return (h << 32) | l;
+    uint64_t value;
+    timer_get_alarm_value(timer->group, timer->num, &value);
+    return value;
 }
 
 void timerWrite(hw_timer_t *timer, uint64_t val){
-    timer->dev->load_high = (uint32_t) (val >> 32);
-    timer->dev->load_low = (uint32_t) (val);
-    timer->dev->reload = 1;
+    timer_set_counter_value(timer->group, timer->num, val);
 }
 
 void timerAlarmWrite(hw_timer_t *timer, uint64_t alarm_value, bool autoreload){
-    timer->dev->alarm_high = (uint32_t) (alarm_value >> 32);
-    timer->dev->alarm_low = (uint32_t) alarm_value;
-    timer->dev->config.autoreload = autoreload;
+    timer_set_alarm_value(timer->group, timer->num, alarm_value);
+    timerSetAutoReload(timer,autoreload);
 }
 
 void timerSetConfig(hw_timer_t *timer, uint32_t config){
-    timer->dev->config.val = config;
+    timer_cfg_t cfg;
+    cfg.val = config;
+    timer_set_alarm(timer->group, timer->num, cfg.alarm_en);
+    timerSetDivider(timer,cfg.divider);
+    timerSetAutoReload(timer,cfg.autoreload);
+    timerSetCountUp(timer, cfg.increase);
+
+    if (cfg.enable) {
+        timerStart(timer);
+    }
+    else{
+        timerStop(timer);
+    }
+    return;
 }
 
 uint32_t timerGetConfig(hw_timer_t *timer){
-    return timer->dev->config.val;
+    timer_config_t timer_cfg;
+    timer_get_config(timer->group, timer->num,&timer_cfg);
+
+    //Translate to default uint32_t
+    timer_cfg_t cfg;
+    cfg.alarm_en = timer_cfg.alarm_en;
+    cfg.autoreload = timer_cfg.auto_reload;
+    cfg.divider = timer_cfg.divider;
+    cfg.edge_int_en = timer_cfg.intr_type;
+    cfg.level_int_en = !timer_cfg.intr_type;
+    cfg.enable = timer_cfg.counter_en;
+    cfg.increase = timer_cfg.counter_dir;
+
+    return cfg.val;
 }
 
 void timerSetCountUp(hw_timer_t *timer, bool countUp){
-    timer->dev->config.increase = countUp;
+    timer_set_counter_mode(timer->group, timer->num,countUp);
 }
 
 bool timerGetCountUp(hw_timer_t *timer){
-    return timer->dev->config.increase;
+    timer_cfg_t config;
+    config.val = timerGetConfig(timer);
+    return config.increase;
 }
 
 void timerSetAutoReload(hw_timer_t *timer, bool autoreload){
-    timer->dev->config.autoreload = autoreload;
+    timer_set_auto_reload(timer->group, timer->num,autoreload);
 }
 
 bool timerGetAutoReload(hw_timer_t *timer){
-    return timer->dev->config.autoreload;
+    timer_cfg_t config;
+    config.val= timerGetConfig(timer);
+    return config.autoreload;
 }
 
-void timerSetDivider(hw_timer_t *timer, uint16_t divider){//2 to 65536
-    if(!divider){
-        divider = 0xFFFF;
-    } else if(divider == 1){
-        divider = 2;
+// Set divider from 2 to 65535
+void timerSetDivider(hw_timer_t *timer, uint16_t divider){
+    if(divider < 2)
+    {
+        log_e("Timer divider must be set in range of 2 to 65535");
+        return;
     }
-    int timer_en = timer->dev->config.enable;
-    timer->dev->config.enable = 0;
-    timer->dev->config.divider = divider;
-    timer->dev->config.enable = timer_en;
+    timer_set_divider(timer->group, timer->num,divider);
 }
 
 uint16_t timerGetDivider(hw_timer_t *timer){
-    return timer->dev->config.divider;
+    timer_cfg_t config;
+    config.val = timerGetConfig(timer);
+    return config.divider;
 }
 
 void timerStart(hw_timer_t *timer){
-    timer->dev->config.enable = 1;
+    timer_start(timer->group, timer->num);
 }
 
 void timerStop(hw_timer_t *timer){
-    timer->dev->config.enable = 0;
+    timer_pause(timer->group, timer->num);
 }
 
 void timerRestart(hw_timer_t *timer){
-    timer->dev->config.enable = 0;
-    timer->dev->config.enable = 1;
+    timerWrite(timer,0);
 }
 
 bool timerStarted(hw_timer_t *timer){
-    return timer->dev->config.enable;
+    timer_cfg_t config;
+    config.val = timerGetConfig(timer);
+    return config.enable;
 }
 
 void timerAlarmEnable(hw_timer_t *timer){
-    timer->dev->config.alarm_en = 1;
+    timer_set_alarm(timer->group, timer->num,true);
 }
 
 void timerAlarmDisable(hw_timer_t *timer){
-    timer->dev->config.alarm_en = 0;
+    timer_set_alarm(timer->group, timer->num,false);
 }
 
 bool timerAlarmEnabled(hw_timer_t *timer){
-    return timer->dev->config.alarm_en;
+    timer_cfg_t config;
+    config.val = timerGetConfig(timer);
+    return config.alarm_en;
+}
+
+static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
+    hw_timer_t * timer = (hw_timer_t *)arg;
+    if(ev_type == APB_BEFORE_CHANGE){
+        timerStop(timer);
+    } else {
+        old_apb /= 1000000;
+        new_apb /= 1000000;
+        uint16_t divider = (new_apb * timerGetDivider(timer)) / old_apb;
+        timerSetDivider(timer,divider);
+        timerStart(timer);
+    }
 }
 
 hw_timer_t * timerBegin(uint8_t num, uint16_t divider, bool countUp){
-    if(num > 3){
+    if(num >= NUM_OF_TIMERS)
+    {
+        log_e("Timer dont have that timer number.");
         return NULL;
     }
-    hw_timer_t * timer = &hw_timer[num];
-    if(timer->group) {
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_TIMERGROUP1_CLK_EN);
-        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);
-        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;
-    timerSetDivider(timer, divider);
-    timerSetCountUp(timer, countUp);
-    timerSetAutoReload(timer, false);
-    timerAttachInterrupt(timer, NULL, false);
-    timerWrite(timer, 0);
-    timer->dev->config.enable = 1;
+
+    hw_timer_t * timer = &timer_dev[num];   //Get Timer group/num from 0-3 number
+    
+    timer_config_t config = {
+            .divider = divider,
+            .counter_dir = countUp,
+            .counter_en = TIMER_PAUSE,
+            .alarm_en = TIMER_ALARM_DIS,
+            .auto_reload = false,
+        };
+
+    timer_init(timer->group, timer->num, &config);
+    timer_set_counter_value(timer->group, timer->num, 0);
+    timerStart(timer);
+    addApbChangeCallback(timer, _on_apb_change);
     return timer;
 }
 
 void timerEnd(hw_timer_t *timer){
-    timer->dev->config.enable = 0;
-    timerAttachInterrupt(timer, NULL, false);
+    removeApbChangeCallback(timer, _on_apb_change);
+    timer_deinit(timer->group, timer->num);
 }
 
 void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
-    static bool initialized = false;
-    static intr_handle_t intr_handle = NULL;
-    if(intr_handle){
-        esp_intr_disable(intr_handle);
-    }
-    if(fn == NULL){
-        timer->dev->config.level_int_en = 0;
-        timer->dev->config.edge_int_en = 0;
-        timer->dev->config.alarm_en = 0;
-        if(timer->num & 2){
-            TIMERG1.int_ena.val &= ~BIT(timer->timer);
-        } else {
-            TIMERG0.int_ena.val &= ~BIT(timer->timer);
-        }
-        __timerInterruptHandlers[timer->num] = NULL;
-    } else {
-        __timerInterruptHandlers[timer->num] = fn;
-        timer->dev->config.level_int_en = edge?0:1;//When set, an alarm will generate a level type interrupt.
-        timer->dev->config.edge_int_en = edge?1:0;//When set, an alarm will generate an edge type interrupt.
-        int intr_source = 0;
-        if(!edge){
-            if(timer->group){
-                intr_source = ETS_TG1_T0_LEVEL_INTR_SOURCE + timer->timer;
-            } else {
-                intr_source = ETS_TG0_T0_LEVEL_INTR_SOURCE + timer->timer;
-            }
-        } else {
-            if(timer->group){
-                intr_source = ETS_TG1_T0_EDGE_INTR_SOURCE + timer->timer;
-            } else {
-                intr_source = ETS_TG0_T0_EDGE_INTR_SOURCE + timer->timer;
-            }
-        }
-        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);
-        } else {
-            intr_matrix_set(esp_intr_get_cpu(intr_handle), intr_source, esp_intr_get_intno(intr_handle));
-        }
-        if(timer->group){
-            TIMERG1.int_ena.val |= BIT(timer->timer);
-        } else {
-            TIMERG0.int_ena.val |= BIT(timer->timer);
-        }
-    }
-    if(intr_handle){
-        esp_intr_enable(intr_handle);
+    if(edge){
+        log_w("EDGE timer interrupt is not supported! Setting to LEVEL...");
+        edge = false;
     }
+    timer_enable_intr(timer->group, timer->num);
+
+    timer_info_t *timer_info = calloc(1, sizeof(timer_info_t));
+    timer_info->timer_group = timer->group;
+    timer_info->timer_idx = timer->num;
+    timer_info->auto_reload = timerGetAutoReload(timer);
+    timer_info->alarm_interval = timerAlarmRead(timer);
+
+    timer_isr_callback_add(timer->group, timer->num, (timer_isr_t)fn, timer_info, 0);
 }
 
 void timerDetachInterrupt(hw_timer_t *timer){
@@ -271,23 +243,35 @@ void timerDetachInterrupt(hw_timer_t *timer){
 uint64_t timerReadMicros(hw_timer_t *timer){
     uint64_t timer_val = timerRead(timer);
     uint16_t div = timerGetDivider(timer);
-    return timer_val * div / 80;
+    return timer_val * div / (getApbFrequency() / 1000000);
+}
+
+uint64_t timerReadMilis(hw_timer_t *timer){
+    uint64_t timer_val = timerRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return timer_val * div / (getApbFrequency() / 1000);
 }
 
 double timerReadSeconds(hw_timer_t *timer){
     uint64_t timer_val = timerRead(timer);
     uint16_t div = timerGetDivider(timer);
-    return (double)timer_val * div / 80000000;
+    return (double)timer_val * div / getApbFrequency();
 }
 
 uint64_t timerAlarmReadMicros(hw_timer_t *timer){
     uint64_t timer_val = timerAlarmRead(timer);
     uint16_t div = timerGetDivider(timer);
-    return timer_val * div / 80;
+    return timer_val * div / (getApbFrequency() / 1000000);
+}
+
+uint64_t timerAlarmReadMilis(hw_timer_t *timer){
+    uint64_t timer_val = timerAlarmRead(timer);
+    uint16_t div = timerGetDivider(timer);
+    return timer_val * div / (getApbFrequency() / 1000);
 }
 
 double timerAlarmReadSeconds(hw_timer_t *timer){
     uint64_t timer_val = timerAlarmRead(timer);
     uint16_t div = timerGetDivider(timer);
-    return (double)timer_val * div / 80000000;
+    return (double)timer_val * div / getApbFrequency();
 }

cores/esp32/esp32-hal-timer.h

@@ -20,13 +20,13 @@
 #ifndef MAIN_ESP32_HAL_TIMER_H_
 #define MAIN_ESP32_HAL_TIMER_H_
 
+#include "esp32-hal.h"
+#include "freertos/FreeRTOS.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "esp32-hal.h"
-#include "freertos/FreeRTOS.h"
-
 struct hw_timer_s;
 typedef struct hw_timer_s hw_timer_t;
 
@@ -50,6 +50,7 @@ void timerSetAutoReload(hw_timer_t *timer, bool autoreload);
 bool timerStarted(hw_timer_t *timer);
 uint64_t timerRead(hw_timer_t *timer);
 uint64_t timerReadMicros(hw_timer_t *timer);
+uint64_t timerReadMilis(hw_timer_t *timer);
 double timerReadSeconds(hw_timer_t *timer);
 uint16_t timerGetDivider(hw_timer_t *timer);
 bool timerGetCountUp(hw_timer_t *timer);
@@ -57,7 +58,7 @@ bool timerGetAutoReload(hw_timer_t *timer);
 
 void timerAlarmEnable(hw_timer_t *timer);
 void timerAlarmDisable(hw_timer_t *timer);
-void timerAlarmWrite(hw_timer_t *timer, uint64_t interruptAt, bool autoreload);
+void timerAlarmWrite(hw_timer_t *timer, uint64_t alarm_value, bool autoreload);
 
 bool timerAlarmEnabled(hw_timer_t *timer);
 uint64_t timerAlarmRead(hw_timer_t *timer);

cores/esp32/esp32-hal-tinyusb.c

@@ -0,0 +1,775 @@
+
+#include "sdkconfig.h"
+#if CONFIG_TINYUSB_ENABLED
+#include <stdlib.h>
+#include <stdbool.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/usb_periph.h"
+#include "soc/periph_defs.h"
+#include "soc/timer_group_struct.h"
+#include "soc/system_reg.h"
+
+#include "hal/usb_hal.h"
+#include "hal/gpio_ll.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "driver/gpio.h"
+#include "driver/periph_ctrl.h"
+
+#include "esp_efuse.h"
+#include "esp_efuse_table.h"
+#include "esp_rom_gpio.h"
+
+#include "esp32-hal.h"
+
+#include "esp32-hal-tinyusb.h"
+#if CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/usb/usb_persist.h"
+#include "esp32s2/rom/usb/usb_dc.h"
+#include "esp32s2/rom/usb/chip_usb_dw_wrapper.h"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "hal/usb_serial_jtag_ll.h"
+#include "esp32s3/rom/usb/usb_persist.h"
+#include "esp32s3/rom/usb/usb_dc.h"
+#include "esp32s3/rom/usb/chip_usb_dw_wrapper.h"
+#endif
+
+typedef enum{
+    TINYUSB_USBDEV_0,
+} tinyusb_usbdev_t;
+
+typedef char *tusb_desc_strarray_device_t[USB_STRING_DESCRIPTOR_ARRAY_SIZE];
+
+typedef struct {
+    bool external_phy;
+} tinyusb_config_t;
+
+static void configure_pins(usb_hal_context_t *usb)
+{
+    for (const usb_iopin_dsc_t *iopin = usb_periph_iopins; iopin->pin != -1; ++iopin) {
+        if ((usb->use_external_phy) || (iopin->ext_phy_only == 0)) {
+            esp_rom_gpio_pad_select_gpio(iopin->pin);
+            if (iopin->is_output) {
+                esp_rom_gpio_connect_out_signal(iopin->pin, iopin->func, false, false);
+            } else {
+                esp_rom_gpio_connect_in_signal(iopin->pin, iopin->func, false);
+                if ((iopin->pin != GPIO_FUNC_IN_LOW) && (iopin->pin != GPIO_FUNC_IN_HIGH)) {
+                    gpio_ll_input_enable(&GPIO, iopin->pin);
+                }
+            }
+            esp_rom_gpio_pad_unhold(iopin->pin);
+        }
+    }
+    if (!usb->use_external_phy) {
+        gpio_set_drive_capability(USBPHY_DM_NUM, GPIO_DRIVE_CAP_3);
+        gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
+    }
+}
+
+esp_err_t tinyusb_driver_install(const tinyusb_config_t *config)
+{
+    usb_hal_context_t hal = {
+        .use_external_phy = config->external_phy
+    };
+    usb_hal_init(&hal);
+    configure_pins(&hal);
+    if (!tusb_init()) {
+        log_e("Can't initialize the TinyUSB stack.");
+        return ESP_FAIL;
+    }
+    return ESP_OK;
+}
+
+
+
+
+
+
+
+
+
+
+typedef char tusb_str_t[127];
+
+static bool WEBUSB_ENABLED                = false;
+
+static tusb_str_t WEBUSB_URL              = "";
+static tusb_str_t USB_DEVICE_PRODUCT      = "";
+static tusb_str_t USB_DEVICE_MANUFACTURER = "";
+static tusb_str_t USB_DEVICE_SERIAL       = "";
+static tusb_str_t USB_DEVICE_LANGUAGE     = "\x09\x04";//English (0x0409)
+
+static uint8_t USB_DEVICE_ATTRIBUTES     = 0;
+static uint16_t USB_DEVICE_POWER         = 0;
+
+/*
+ * 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
+        USB_DEVICE_LANGUAGE,    // 0: is supported language
+        USB_DEVICE_MANUFACTURER,// 1: Manufacturer
+        USB_DEVICE_PRODUCT,     // 2: Product
+        USB_DEVICE_SERIAL,      // 3: Serials, should use chip ID
+};
+
+
+/* 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         = 255, // 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.
+ */
+__attribute__ ((weak)) 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.
+ */
+__attribute__ ((weak)) 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.
+ */
+__attribute__ ((weak)) uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid)
+{
+    //log_d("%u (0x%x)", index, langid);
+    static uint16_t _desc_str[127];
+    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_v("");
+    return tinyusb_bos_descriptor;
+}
+
+__attribute__ ((weak)) bool tinyusb_vendor_control_request_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request){ return false; }
+
+/**
+ * @brief Handle WebUSB and Vendor requests.
+ */
+bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request)
+{
+    if(WEBUSB_ENABLED && (request->bRequest == VENDOR_REQUEST_WEBUSB
+            || (request->bRequest == VENDOR_REQUEST_MICROSOFT && request->wIndex == 7))){
+        // we only care for SETUP stage
+        if (stage == CONTROL_STAGE_SETUP) {
+            if(request->bRequest == VENDOR_REQUEST_WEBUSB){
+                // match vendor request in BOS descriptor
+                // Get landing page url
+                tinyusb_url_descriptor.bLength = 3 + strlen(WEBUSB_URL);
+                snprintf(tinyusb_url_descriptor.url, 127, "%s", WEBUSB_URL);
+                return tud_control_xfer(rhport, request, (void*) &tinyusb_url_descriptor, tinyusb_url_descriptor.bLength);
+            }
+            // Get Microsoft OS 2.0 compatible descriptor
+            uint16_t total_len;
+            memcpy(&total_len, tinyusb_ms_os_20_descriptor + 8, 2);
+            return tud_control_xfer(rhport, request, (void*) tinyusb_ms_os_20_descriptor, total_len);
+        }
+        return true;
+    }
+    log_v("rhport: %u, stage: %u, type: 0x%x, request: 0x%x", rhport, stage, request->bmRequestType_bit.type, request->bRequest);
+    return tinyusb_vendor_control_request_cb(rhport, stage, request);
+}
+
+/*
+ * Required Callbacks
+ * */
+#if CFG_TUD_HID
+__attribute__ ((weak)) const uint8_t * tud_hid_descriptor_report_cb(uint8_t itf){return NULL;}
+__attribute__ ((weak)) uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen){return 0;}
+__attribute__ ((weak)) void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, const uint8_t * buffer, uint16_t bufsize){}
+#endif
+#if CFG_TUD_MSC
+__attribute__ ((weak)) bool tud_msc_test_unit_ready_cb(uint8_t lun){return false;}
+__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;
+
+#if CONFIG_IDF_TARGET_ESP32S3
+
+static void hw_cdc_reset_handler(void *arg) {
+    portBASE_TYPE xTaskWoken = 0;
+    uint32_t usbjtag_intr_status = usb_serial_jtag_ll_get_intsts_mask();
+    usb_serial_jtag_ll_clr_intsts_mask(usbjtag_intr_status);
+    
+    if (usbjtag_intr_status & USB_SERIAL_JTAG_INTR_BUS_RESET) {
+        xSemaphoreGiveFromISR((xSemaphoreHandle)arg, &xTaskWoken);
+    }
+
+    if (xTaskWoken == pdTRUE) {
+        portYIELD_FROM_ISR();
+    }
+}
+
+static void usb_switch_to_cdc_jtag(){
+    // Disable USB-OTG
+    periph_module_reset(PERIPH_USB_MODULE);
+    //periph_module_enable(PERIPH_USB_MODULE);
+    periph_module_disable(PERIPH_USB_MODULE);
+
+    // Switch to hardware CDC+JTAG
+    CLEAR_PERI_REG_MASK(RTC_CNTL_USB_CONF_REG, (RTC_CNTL_SW_HW_USB_PHY_SEL|RTC_CNTL_SW_USB_PHY_SEL|RTC_CNTL_USB_PAD_ENABLE));
+
+    // Do not use external PHY
+    CLEAR_PERI_REG_MASK(USB_SERIAL_JTAG_CONF0_REG, USB_SERIAL_JTAG_PHY_SEL);
+
+    // Release GPIO pins from  CDC+JTAG
+    CLEAR_PERI_REG_MASK(USB_SERIAL_JTAG_CONF0_REG, USB_SERIAL_JTAG_USB_PAD_ENABLE);
+
+    // Force the host to re-enumerate (BUS_RESET)
+    pinMode(USBPHY_DM_NUM, OUTPUT_OPEN_DRAIN);
+    pinMode(USBPHY_DP_NUM, OUTPUT_OPEN_DRAIN);
+    digitalWrite(USBPHY_DM_NUM, LOW);
+    digitalWrite(USBPHY_DP_NUM, LOW);
+
+    // Initialize CDC+JTAG ISR to listen for BUS_RESET
+    usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+    usb_serial_jtag_ll_clr_intsts_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+    usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_BUS_RESET);
+    intr_handle_t intr_handle = NULL;
+    xSemaphoreHandle reset_sem = xSemaphoreCreateBinary();
+    if(reset_sem){
+        if(esp_intr_alloc(ETS_USB_SERIAL_JTAG_INTR_SOURCE, 0, hw_cdc_reset_handler, reset_sem, &intr_handle) != ESP_OK){
+            vSemaphoreDelete(reset_sem);
+            reset_sem = NULL;
+            log_e("HW USB CDC failed to init interrupts");
+        }
+    } else {
+        log_e("reset_sem init failed");
+    }
+
+    // Connect GPIOs to integrated CDC+JTAG
+    SET_PERI_REG_MASK(USB_SERIAL_JTAG_CONF0_REG, USB_SERIAL_JTAG_USB_PAD_ENABLE);
+
+    // Wait for BUS_RESET to give us back the semaphore
+    if(reset_sem){
+        if(xSemaphoreTake(reset_sem, 1000 / portTICK_PERIOD_MS) != pdPASS){
+            log_e("reset_sem timeout");
+        }
+        usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
+        esp_intr_free(intr_handle);
+        vSemaphoreDelete(reset_sem);
+    }
+}
+#endif
+
+static void IRAM_ATTR usb_persist_shutdown_handler(void)
+{
+    if(usb_persist_mode != RESTART_NO_PERSIST){
+        if (usb_persist_enabled) {
+            usb_dc_prepare_persist();
+        }
+        if (usb_persist_mode == RESTART_BOOTLOADER) {
+            //USB CDC Download
+            if (usb_persist_enabled) {
+                chip_usb_set_persist_flags(USBDC_PERSIST_ENA);
+#if CONFIG_IDF_TARGET_ESP32S2
+            } else {
+                periph_module_reset(PERIPH_USB_MODULE);
+                periph_module_enable(PERIPH_USB_MODULE);
+#endif
+            }
+            REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
+        } else if (usb_persist_mode == RESTART_BOOTLOADER_DFU) {
+            //DFU Download
+#if CONFIG_IDF_TARGET_ESP32S2
+            // Reset USB Core
+            USB0.grstctl |= USB_CSFTRST;
+            while ((USB0.grstctl & USB_CSFTRST) == USB_CSFTRST){}
+#endif
+            chip_usb_set_persist_flags(USBDC_BOOT_DFU);
+            REG_WRITE(RTC_CNTL_OPTION1_REG, RTC_CNTL_FORCE_DOWNLOAD_BOOT);
+        } else if (usb_persist_enabled) {
+            //USB Persist reboot
+            chip_usb_set_persist_flags(USBDC_PERSIST_ENA);
+        }
+    }
+}
+
+void usb_persist_restart(restart_type_t mode)
+{
+    if (mode < RESTART_TYPE_MAX && esp_register_shutdown_handler(usb_persist_shutdown_handler) == ESP_OK) {
+        usb_persist_mode = mode;
+#if CONFIG_IDF_TARGET_ESP32S3
+        if (mode == RESTART_BOOTLOADER) {
+            usb_switch_to_cdc_jtag();
+        }
+#endif
+        esp_restart();
+    }
+}
+
+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 {
+                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);
+    }
+
+    // Windows 10 will not recognize the CDC device if WebUSB is enabled and USB Class is not 2 (CDC)
+    if(
+        (tinyusb_loaded_interfaces_mask & BIT(USB_INTERFACE_CDC)) 
+        && config->webusb_enabled 
+        && (config->usb_class != TUSB_CLASS_CDC)
+    ){
+        config->usb_class = TUSB_CLASS_CDC;
+        config->usb_protocol = 0x00;
+    }
+
+    WEBUSB_ENABLED            = config->webusb_enabled;
+    USB_DEVICE_ATTRIBUTES     = config->usb_attributes;
+    USB_DEVICE_POWER          = config->usb_power_ma;
+    
+    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;
+}
+
+// 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
+ * */
+static const char *tinyusb_interface_names[USB_INTERFACE_MAX] = {"MSC", "DFU", "HID", "VENDOR", "CDC", "MIDI", "CUSTOM"};
+
+static bool tinyusb_is_initialized = false;
+
+esp_err_t tinyusb_enable_interface(tinyusb_interface_t interface, uint16_t descriptor_len, tinyusb_descriptor_cb_t cb)
+{
+    if(tinyusb_is_initialized){
+        log_e("TinyUSB has already started! Interface %s not enabled", (interface >= USB_INTERFACE_MAX)?"":tinyusb_interface_names[interface]);
+        return ESP_FAIL;
+    }
+    if((interface >= USB_INTERFACE_MAX) || (tinyusb_loaded_interfaces_mask & (1U << interface))){
+        log_e("Interface %s invalid or already enabled", (interface >= USB_INTERFACE_MAX)?"":tinyusb_interface_names[interface]);
+        return ESP_FAIL;
+    }
+    if(interface == USB_INTERFACE_CDC){
+        if(!tinyusb_reserve_out_endpoint(3) ||!tinyusb_reserve_in_endpoint(4) || !tinyusb_reserve_in_endpoint(5)){
+            log_e("CDC Reserve Endpoints Failed");
+            return ESP_FAIL;
+        }
+    }
+    tinyusb_loaded_interfaces_mask |= (1U << interface);
+    tinyusb_config_descriptor_len += descriptor_len;
+    tinyusb_loaded_interfaces_callbacks[interface] = cb;
+    log_d("Interface %s enabled", tinyusb_interface_names[interface]);
+    return ESP_OK;
+}
+
+esp_err_t tinyusb_init(tinyusb_device_config_t *config) {
+    if(tinyusb_is_initialized){
+        return ESP_OK;
+    }
+    tinyusb_is_initialized = true;
+    
+    //tinyusb_endpoints.val = 0;
+    tinyusb_apply_device_config(config);
+    if (!tinyusb_load_enabled_interfaces()) {
+        tinyusb_is_initialized = false;
+        return ESP_FAIL;
+    }
+
+    bool usb_did_persist = (USB_WRAP.date.val == USBDC_PERSIST_ENA);
+
+    //if(usb_did_persist && usb_persist_enabled){
+        // 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 
+    if(!usb_did_persist || !usb_persist_enabled){
+        // Reset USB module
+        periph_module_reset(PERIPH_USB_MODULE);
+        periph_module_enable(PERIPH_USB_MODULE);
+    }
+
+    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) {
+        tinyusb_is_initialized = false;
+        return err;
+    }
+    xTaskCreate(usb_device_task, "usbd", 4096, NULL, configMAX_PRIORITIES - 1, NULL);
+    return err;
+}
+
+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;
+}
+
+#endif /* CONFIG_TINYUSB_ENABLED */