Hi, any chance your library will work on nRF52840 architecture?

.clang-format

@@ -3,23 +3,29 @@ Language:        Cpp
 # BasedOnStyle:  LLVM
 AccessModifierOffset: -2
 AlignAfterOpenBracket: Align
+AlignConsecutiveMacros: false
 AlignConsecutiveAssignments: false
 AlignConsecutiveDeclarations: false
 AlignEscapedNewlines: Right
 AlignOperands:   true
 AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
 AllowAllParametersOfDeclarationOnNextLine: true
-AllowShortBlocksOnASingleLine: false
+AllowShortBlocksOnASingleLine: Never
 AllowShortCaseLabelsOnASingleLine: true
 AllowShortFunctionsOnASingleLine: All
-AllowShortIfStatementsOnASingleLine: false
+AllowShortLambdasOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: Never
 AllowShortLoopsOnASingleLine: false
 AlwaysBreakAfterDefinitionReturnType: None
 AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
 BinPackArguments: true
 BinPackParameters: true
-BraceWrapping:   
+BraceWrapping:
+  AfterCaseLabel:  false
   AfterClass:      false
   AfterControlStatement: false
   AfterEnum:       false
@@ -38,6 +44,7 @@ BraceWrapping:
 BreakBeforeBinaryOperators: None
 BreakBeforeBraces: Attach
 BreakBeforeInheritanceComma: false
+BreakInheritanceList: BeforeColon
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: false
 BreakConstructorInitializers: BeforeColon
@@ -50,24 +57,30 @@ ConstructorInitializerAllOnOneLineOrOnePerLine: false
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true
+DeriveLineEnding: true
 DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 FixNamespaceComments: true
-ForEachMacros:   
+ForEachMacros:
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
 IncludeBlocks:   Preserve
-IncludeCategories: 
+IncludeCategories:
   - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
     Priority:        2
+    SortPriority:    0
   - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
     Priority:        3
+    SortPriority:    0
   - Regex:           '.*'
     Priority:        1
+    SortPriority:    0
 IncludeIsMainRegex: '(Test)?$'
+IncludeIsMainSourceRegex: ''
 IndentCaseLabels: true
+IndentGotoLabels: true
 IndentPPDirectives: None
 IndentWidth:     4
 IndentWrappedFunctionNames: false
@@ -78,6 +91,7 @@ MacroBlockBegin: ''
 MacroBlockEnd:   ''
 MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
+ObjCBinPackProtocolList: Auto
 ObjCBlockIndentWidth: 2
 ObjCSpaceAfterProperty: false
 ObjCSpaceBeforeProtocolList: true
@@ -86,29 +100,37 @@ PenaltyBreakBeforeFirstCallParameter: 19
 PenaltyBreakComment: 300
 PenaltyBreakFirstLessLess: 120
 PenaltyBreakString: 1000
+PenaltyBreakTemplateDeclaration: 10
 PenaltyExcessCharacter: 1000000
-AlwaysBreakTemplateDeclarations: true
 PenaltyReturnTypeOnItsOwnLine: 60
 PointerAlignment: Right
-RawStringFormats: 
-  - Delimiter:       pb
-    Language:        TextProto
-    BasedOnStyle:    google
 ReflowComments:  false
 SortIncludes:    true
 SortUsingDeclarations: true
 SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
 SpaceAfterTemplateKeyword: true
 SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
 SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyBlock: false
 SpaceInEmptyParentheses: false
 SpacesBeforeTrailingComments: 1
 SpacesInAngles:  false
+SpacesInConditionalStatement: false
 SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
-Standard:        Cpp11
+SpaceBeforeSquareBrackets: false
+Standard:        14
+StatementMacros:
+  - Q_UNUSED
+  - QT_REQUIRE_VERSION
 TabWidth:        8
+UseCRLF:         false
 UseTab:          Never
 ...

.github/workflows/ccpp.yml

@@ -9,14 +9,14 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - name: Git Submodules
-      run: git submodule update --init --recursive --depth 50
-    - name: CMake
-      run: cmake ..
-      working-directory: build
+    - name: Install dependencies
+      run: sudo ./scripts/install-gtest.sh Debug /usr/local
+    - name: Configure
+      run: cmake -S. --preset ci
+      env:
+        CC: gcc-9
+        CXX: g++-9
     - name: Build
-      run: make -j4
-      working-directory: build
-    - name: Run tests
-      run: make check
-      working-directory: build
+      run: cmake --build --preset ci -j
+    - name: Test
+      run: ctest --preset ci

.github/workflows/documentation.yml

@@ -0,0 +1,82 @@
+# This action generates the documentation and then deploys it to the `gh-pages` branch.
+
+name: Documentation & Coverage
+
+on:
+  push:
+
+jobs:
+  deploy-docs:
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    # Cache the doxygen executable, lcov
+    - uses: actions/cache@v2
+      id: cache-tools
+      with:
+        path: |
+          /tmp/doxygen
+          /tmp/lcov
+          /tmp/gtest
+        key: ${{ runner.os }}-doc-${{ hashFiles('scripts/ci/install-doxygen.sh', 'scripts/ci/install-lcov.sh', 'scripts/install-gtest.sh') }}
+
+    - name: Install Graphviz/Dot and LCOV Perl dependencies, as well as TeX Live
+      run: |
+        sudo apt-get install \
+          graphviz libjson-perl libperlio-gzip-perl perl \
+          texlive-binaries
+
+    - name: Install LCOV
+      run: |
+        ./scripts/ci/install-lcov.sh /tmp/lcov
+        echo "/tmp/lcov/bin" >> $GITHUB_PATH
+
+    # Download and build doxygen (if not cached already)
+    - name: Install Doxygen
+      run: |
+        ./scripts/ci/install-doxygen.sh /tmp/doxygen
+        echo "/tmp/doxygen/bin" >> $GITHUB_PATH
+
+    - name: Install Google Test
+      if: steps.cache-tools.outputs.cache-hit != 'true'
+      shell: bash
+      run: ./scripts/install-gtest.sh Debug /tmp/gtest
+
+    # Install Python
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.9.6'
+
+    # Create the `gh-pages` branch if it doesn't exist already, check it out, 
+    # and copy it to /tmp/staging.
+    - name: Create staging area
+      run: |
+        rm -rf /tmp/staging
+        git fetch origin gh-pages:gh-pages ||:
+        git checkout gh-pages || \
+        { git checkout --orphan gh-pages && git rm -rf . && git clean -fxd ; }
+        cp -ar $GITHUB_WORKSPACE/ /tmp/staging
+        git checkout ${GITHUB_REF##*/}
+        git submodule update --init --recursive
+
+    # Generate the documentation and save it in /tmp/staging
+    - name: Generate documentation
+      run: ./scripts/ci/gen-docs.sh /tmp/staging
+      env:
+        CC: gcc-10
+        CXX: g++-10
+        CMAKE_PREFIX_PATH: /tmp/gtest
+
+    # Commit the new documentation, squash the commits, and push it to GitHub
+    - name: Commit and push documention
+      run: |
+        git config --global user.name "github-actions"
+        git config --global user.email "actions@github.com"
+        commithash=$(git rev-parse HEAD)
+        cd /tmp/staging
+        git add .
+        git commit -m "Documentation for ${commithash}" && \
+        git reset $(git commit-tree HEAD^{tree} -m "Documentation for ${commithash}") && \
+        git push -f origin gh-pages ||:

.github/workflows/examples.yaml

@@ -0,0 +1,94 @@
+name: Examples
+
+on: push
+
+jobs:
+  compile-examples:
+    name: Examples
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        board: [AVR, Nano 33 BLE, Nano 33 IoT, ESP32, ESP8266, AVR USB, Mega, Leonardo, Due, Nano Every, Teensy 3.x, Teensy 4.1]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+
+      - name: Cache Arduino CLI
+        uses: actions/cache@v2.1.4
+        with:
+          path: |
+            ~/.local/bin
+          key: ${{ runner.os }}-local-bin-v2
+
+      - name: Cache Arduino Cores and Libraries
+        uses: actions/cache@v2.1.4
+        with:
+          path: |
+            ~/.arduino15
+            ~/Arduino/libraries
+          key: ${{ runner.os }}-arduino-v3-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-arduino-v3-
+
+      - name: Cache Compiled Arduino Cores and Sketches
+        uses: actions/cache@v2.1.4
+        with:
+          path: |
+            /tmp/arduino-sketch-*
+            /tmp/core-*
+          key: ${{ runner.os }}-arduino-compiled-v3-${{ matrix.board }}-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-arduino-compiled-v3-${{ matrix.board }}-
+
+      - name: Update $PATH
+        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - name: Install Arduino CLI
+        run: |
+          mkdir -p "$HOME/.local/bin"
+          which arduino-cli || { curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR="$HOME/.local/bin" sh; }
+          mkdir -p "$HOME/.arduino15"
+          cp "$GITHUB_WORKSPACE/tools/arduino-cli.yaml" "$HOME/.arduino15"
+          arduino-cli core update-index
+
+      - name: Install Arduino Boards
+        run: |
+          arduino-cli core install arduino:avr arduino:mbed_nano arduino:samd esp32:esp32 esp8266:esp8266 arduino:sam arduino:megaavr teensy:avr
+          arduino-cli core upgrade
+          arduino-cli cache clean
+          version=$(arduino-cli core list | grep 'teensy:avr' | awk '{print $2}') && { sed -i 's/^recipe.hooks.postbuild/# recipe.hooks.postbuild/g' $HOME/.arduino15/packages/teensy/hardware/avr/$version/platform.txt ||:; }
+          version=$(arduino-cli core list | grep 'arduino:mbed_nano' | awk '{print $2}') && { patch "$HOME/.arduino15/packages/arduino/hardware/mbed_nano/$version/cores/arduino/Arduino.h" -i "$GITHUB_WORKSPACE/scripts/patches/ARDUINO_LIB_DISCOVERY_PHASE.patch" ||:; }
+
+      - name: Install Arduino Libraries
+        run: |
+          mkdir -p "$HOME/Arduino/libraries" && cd "$_"
+          [ -d Adafruit-GFX-Library ] || git clone https://github.com/adafruit/Adafruit-GFX-Library.git --depth=1 &
+          [ -d Adafruit_SSD1306 ] || git clone https://github.com/adafruit/Adafruit_SSD1306.git --depth=1 &
+          [ -d Adafruit_BusIO ] || git clone https://github.com/adafruit/Adafruit_BusIO.git --depth=1 &
+          [ -d FastLED ] || git clone https://github.com/FastLED/FastLED.git --depth=1 &
+          [ -d MIDIUSB ] || git clone https://github.com/arduino-libraries/MIDIUSB.git --depth=1 &
+          [ -d Arduino-AppleMIDI-Library ] || git clone https://github.com/lathoub/Arduino-AppleMIDI-Library.git --depth=1 --branch v3.1.2 &
+          [ -d arduino_midi_library ] || git clone https://github.com/FortySevenEffects/arduino_midi_library.git --depth=1 &
+          ln -snf "$GITHUB_WORKSPACE" "$HOME/Arduino/libraries/"
+          # cp "$GITHUB_WORKSPACE/examples/3. MIDI Interfaces/AppleMIDI/WiFi-Credentials.example.h" "$GITHUB_WORKSPACE/examples/3. MIDI Interfaces/AppleMIDI/WiFi-Credentials.h"
+
+      - name: Cache Python Packages 
+        uses: actions/cache@v2.1.4
+        with:
+          path: ~/.venv
+          key: ${{ runner.os }}-python-venv-v2-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-python-venv-v2-
+
+      - name: Install Python Packages
+        run: |
+          [ -d "$HOME/.venv" ] || python3 -m venv "$HOME/.venv"
+          source "$HOME/.venv/bin/activate"
+          python3 -m pip install -U pyyaml pyserial
+
+      - name: Compile Examples
+        run: |
+          source "$HOME/.venv/bin/activate"
+          python3 "$GITHUB_WORKSPACE/tools/arduino-example-builder.py" "${{ matrix.board }}" --examples_dir "$GITHUB_WORKSPACE/examples"

.gitignore

@@ -2,9 +2,14 @@
 .vscode/tags
 *.pc
 .vscode/ipch
+.cache
 
 .~lock*
 __pycache__/
 
 *.tmp
 *.hex
+
+build
+docs/Coverage
+docs/Doxygen