Adds UF2 output support for release builds.

.github/workflows/release.yaml

@@ -19,11 +19,57 @@ jobs:
     - name: Upload mainboard
       uses: actions/upload-artifact@v2
       with:
-        name: mainboard
-        path: out/Mainboard/Mainboard.ino.*
+        name: sketches
+        path: out/Mainboard/Mainboard.ino.bin
+
+    - name: Extract files
+      run: 7z e ${env:GITHUB_WORKSPACE}/out/Bluetooth/Bluetooth.ino.zip -o"${env:GITHUB_WORKSPACE}/out/Bluetooth"
 
     - name: Upload bluetooth
+      uses: actions/upload-artifact@v2
+      with:
+        name: sketches
+        path: out/Bluetooth/Bluetooth.ino.bin
+
+  package:
+    runs-on: windows-latest
+    timeout-minutes: 15
+    needs: build
+
+    steps:
+    - name: Checkout packager
+      uses: actions/checkout@v2
+      with:
+        repository: microsoft/uf2
+        path: uf2
+
+    - name: Setup Python
+      uses: actions/setup-python@v2
+
+    - name: Download sketches
+      uses: actions/download-artifact@v2
+      with:
+        name: sketches
+        path: bin
+
+    # The values passed into the script need to be retrieved from the following page:
+    # See: https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51/uf2-bootloader-details
+    - name: Package mainboard
+      run: python uf2/utils/uf2conv.py -c -b 0x4000 -o ${env:GITHUB_WORKSPACE}/mainboard.uf2 ${env:GITHUB_WORKSPACE}/bin/Mainboard.ino.bin
+
+    # The values passed into the script need to be retrieved from the following page:
+    # See: https://github.com/adafruit/Adafruit_nRF52_Bootloader
+    - name: Package bluetooth
+      run: python uf2/utils/uf2conv.py -c -b 0x26000 -f 0xADA52840 -o ${env:GITHUB_WORKSPACE}/bluetooth.uf2 ${env:GITHUB_WORKSPACE}/bin/Bluetooth.ino.bin
+
+    - name: Upload mainboard
       uses: actions/upload-artifact@v2
       with:
         name: mainboard
-        path: out/Bluetooth/Bluetooth.ino.*
+        path: mainboard.uf2
+
+    - name: Upload bluetooth
+      uses: actions/upload-artifact@v2
+      with:
+        name: bluetooth
+        path: bluetooth.uf2

Makefile

@@ -10,6 +10,7 @@ else
 endif
 
 # Arduino CLI Board type
+# NOTE: Any changes to the FQBNs here will also likely require updating the release workflow for packaging the UF2 files.
 MAIN_BOARD_TYPE = adafruit:samd
 MAIN_BOARD_VERSION = 1.7.5
 MAIN_FQBN = $(MAIN_BOARD_TYPE):adafruit_feather_m4