CI: Add PicoW MicroPython build.

Wireless raises memory usage significantly requiring Pico Unicorn and Pico Scroll (which both need slight refactoring) to be excluded from the build.

The Flash/Filesystem split has changed from a regular Pico build and may change again. Flashing this to a regular Pico *WILL TRASH YOUR FILESYSTEM*.

.github/workflows/micropython-picow.yml

@@ -0,0 +1,145 @@
+name: MicroPython
+
+on:
+  push:
+  pull_request:
+  release:
+    types: [created]
+
+env:
+  MICROPYTHON_VERSION: 99c25897783122003550d58f8d31b4a8fecc8611
+
+jobs:
+  deps:
+    runs-on: ubuntu-20.04
+    name: Dependencies
+    steps:
+    - name: Workspace Cache
+      id: cache
+      uses: actions/cache@v2
+      with:
+        path: ${{runner.workspace}}
+        key: workspace-micropython-${{env.MICROPYTHON_VERSION}}
+        restore-keys: |
+          workspace-micropython-${{env.MICROPYTHON_VERSION}}
+
+    # Check out MicroPython
+    - name: Checkout MicroPython
+      if: steps.cache.outputs.cache-hit != 'true'
+      uses: actions/checkout@v2
+      with:
+        repository: micropython/micropython
+        ref: ${{env.MICROPYTHON_VERSION}}
+        submodules: false  # MicroPython submodules are hideously broken
+        path: micropython
+
+    - name: Fetch base MicroPython submodules
+      if: steps.cache.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: micropython
+      run: git submodule update --init
+
+    - name: Fetch Pico SDK submodules
+      if: steps.cache.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: micropython/lib/pico-sdk
+      run: git submodule update --init
+
+    - name: Build mpy-cross
+      if: steps.cache.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: micropython/mpy-cross
+      run: make
+
+  build:
+    needs: deps
+    name: Build ${{matrix.board}}
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        include:
+        - name: picow
+          board: PICO_W
+
+    env:
+      # MicroPython version will be contained in github.event.release.tag_name for releases
+      RELEASE_FILE: pimoroni-${{matrix.name}}-${{github.event.release.tag_name || github.sha}}-micropython.uf2
+
+    steps:
+    - name: Compiler Cache
+      uses: actions/cache@v2
+      with:
+        path: /home/runner/.ccache
+        key: ccache-micropython-${{matrix.name}}-${{github.ref}}-${{github.sha}}
+        restore-keys: |
+          ccache-micropython-${{matrix.name}}-${{github.ref}}
+          ccache-micropython-${{matrix.name}}-
+  
+    - name: Workspace Cache
+      uses: actions/cache@v2
+      with:
+        path: ${{runner.workspace}}
+        key: workspace-micropython-${{env.MICROPYTHON_VERSION}}
+        restore-keys: |
+          workspace-micropython-${{env.MICROPYTHON_VERSION}}
+
+    - name: Install Compiler & CCache
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt update && sudo apt install ccache
+
+    - name: Install ARM Toolchain
+      if: runner.os == 'Linux'
+      working-directory: ${{runner.workspace}}
+      run: |
+        wget -q https://developer.arm.com/-/media/Files/downloads/gnu-rm/10.3-2021.10/gcc-arm-none-eabi-10.3-2021.10-x86_64-linux.tar.bz2
+        tar xf gcc-*.tar.bz2
+        cd gcc*/bin
+        pwd >> $GITHUB_PATH
+  
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+        path: pimoroni-pico-${{ github.sha }}
+  
+    - name: "HACK: MicroPython Board Fixups"
+      shell: bash
+      working-directory: micropython/ports/rp2
+      run: |
+        ../../../pimoroni-pico-${GITHUB_SHA}/micropython/_board/board-fixup.sh ${{matrix.name}} ${{matrix.board}} ../../../pimoroni-pico-${GITHUB_SHA}/micropython/_board
+
+    - name: Configure MicroPython
+      shell: bash
+      working-directory: micropython/ports/rp2
+      run: |
+        cmake -S . -B build-${{matrix.board}} -DPICO_BUILD_DOCS=0 -DUSER_C_MODULES=../../../pimoroni-pico-${GITHUB_SHA}/micropython/modules/micropython-${{matrix.name}}.cmake -DMICROPY_BOARD=${{matrix.board}} -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+
+    - name: Build MicroPython
+      shell: bash
+      working-directory: micropython/ports/rp2
+      run: |
+        ccache --zero-stats || true
+        cmake --build build-${{matrix.board}} -j 2
+        ccache --show-stats || true
+
+    - name: Rename .uf2 for artifact
+      shell: bash
+      working-directory: micropython/ports/rp2/build-${{matrix.board}}
+      run: cp firmware.uf2 $RELEASE_FILE
+
+    - name: Store .uf2 as artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: ${{env.RELEASE_FILE}}
+        path: micropython/ports/rp2/build-${{matrix.board}}/${{env.RELEASE_FILE}}
+
+    - name: Upload .uf2
+      if: github.event_name == 'release'
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      with:
+        asset_path: micropython/ports/rp2/build-${{matrix.board}}/firmware.uf2
+        upload_url: ${{github.event.release.upload_url}}
+        asset_name: ${{env.RELEASE_FILE}}
+        asset_content_type: application/octet-stream

micropython/modules/micropython-picow.cmake

@@ -0,0 +1,64 @@
+include_directories(${CMAKE_CURRENT_LIST_DIR}/../../)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../../")
+
+# Essential
+include(pimoroni_i2c/micropython)
+include(pimoroni_bus/micropython)
+
+# Pico Graphics Essential
+include(hershey_fonts/micropython)
+include(bitmap_fonts/micropython)
+include(picographics/micropython)
+
+# Pico Graphics Extra
+include(jpegdec/micropython)
+include(qrcode/micropython/micropython)
+
+# Sensors & Breakouts
+include(breakout_dotmatrix/micropython)
+include(breakout_encoder/micropython)
+include(breakout_ioexpander/micropython)
+include(breakout_ltr559/micropython)
+include(breakout_as7262/micropython)
+include(breakout_rgbmatrix5x5/micropython)
+include(breakout_matrix11x7/micropython)
+include(breakout_msa301/micropython)
+include(breakout_pmw3901/micropython)
+include(breakout_mics6814/micropython)
+include(breakout_potentiometer/micropython)
+include(breakout_rtc/micropython)
+include(breakout_trackball/micropython)
+include(breakout_sgp30/micropython)
+include(breakout_bh1745/micropython)
+include(breakout_bme68x/micropython)
+include(breakout_bme280/micropython)
+include(breakout_bmp280/micropython)
+include(breakout_icp10125/micropython)
+include(breakout_scd41/micropython)
+include(breakout_vl53l5cx/micropython)
+include(pcf85063a/micropython)
+
+# Utility
+include(adcfft/micropython)
+
+# LEDs & Matrices
+include(plasma/micropython)
+include(hub75/micropython)
+
+# Packs
+# include(pico_unicorn/micropython) # 2408 bytes RAM
+# include(pico_scroll/micropython)  # 1284 bytes RAM
+include(pico_rgb_keypad/micropython)
+
+# Servos & Motors
+include(pwm/micropython)
+include(servo/micropython)
+include(encoder/micropython)
+include(motor/micropython)
+
+# include(micropython-common)
+
+include(modules_py/modules_py)