Escape hatches: flash the user keyboard script as part of DFU rather than pushing with ampy. WAY more stable, mostly unbrickable now

Makefile

@@ -12,43 +12,37 @@ build-feather-test: lint devdeps
 	@echo "===> Building circuitpython/mpy-cross"
 	@make -C vendor/circuitpython/mpy-cross
 	@echo "===> Pulling Nordic BLE stack"
-	@cd vendor/circuitpython/ports/nrf && ./drivers/bluetooth/download_ble_stack.sh 2>/dev/null
+	@cd vendor/circuitpython/ports/nrf && ./drivers/bluetooth/download_ble_stack.sh 2>/dev/null >/dev/null
 	@echo "===> Preparing KMK source for bundling into CircuitPython"
 	@rm -rf vendor/circuitpython/ports/nrf/freeze/kmk
-	@cp -av kmk vendor/circuitpython/ports/nrf/freeze
-	@echo "===> Building CircuitPython with KMK"
-	make -C vendor/circuitpython/ports/nrf BOARD=feather_nrf52832 SERIAL=/dev/ttyUSB0 SD=s132 FROZEN_MPY_DIR=freeze clean dfu-gen dfu-flash
-	@echo "===> Pushing keyboard config"
-	sleep 2
-	-pipenv run ampy rm main.py
-	#pipenv run ampy put boards/klardotsh/twotwo_matrix_feather.py main.py
-	@echo
-	@echo
-	@echo "IT IS NOT SAFE TO AUTOMATICALLY FLASH THIS BOARD IF YOU USE A WHILE TRUE LOOP. YOUR DEVICE CAN BECOME UNRECOVERABLE WITHOUT A JLINK"
-	@echo "TRY RUNNING pipenv run ampy run boards/klardotsh/twotwo_matrix_feather.py AND WATCHING THE SERIAL OUTPUT IN ANOTHER CONSOLE"
-	@echo "THAT IS CURRENTLY ALL THE KEYBOARD YOU CAN ABSOLUTELY SAFELY USE"
-	@echo "I'M DISCUSSING THIS WITH THE ADAFRUIT DEVELOPERS ON DISCORD, HOPEFULLY main.py BECOMES FLASHABLE BY DFU IN THE FUTURE"
-	@echo
-	@echo "Okay, now that the all caps disclaimer is out of the way..."
-	@echo "You can still run pipenv run ampy put boards/klardotsh/twotwo_matrix_feather.py main.py"
-	@echo "Your board will probably work. However, anything depending on the Python REPL (this includes ampy) will not."
-	@echo "If you do get stuck in this purgatory, run 'make oh-god-everything-is-stuck', which will flash a purposefully-failing build to your device"
-	@echo "This workaround ONLY works if your keyboard script tries to import from kmk, which I sure hope it does."
-	@echo "Once that process finishes, you can come back to make build-feather-test safely, or go play in the REPL, or drink."
+	@rm -rf vendor/circuitpython/ports/nrf/freeze/kmk_keyboard_user.py
+	@cp -av kmk vendor/circuitpython/ports/nrf/freeze/
+	@cp -av boards/klardotsh/twotwo_matrix_feather.py vendor/circuitpython/ports/nrf/freeze/kmk_keyboard_user.py
+	@echo "===> Building and flashing CircuitPython with KMK and your keymap"
+	@make -C vendor/circuitpython/ports/nrf BOARD=feather_nrf52832 SERIAL=/dev/ttyUSB0 SD=s132 FROZEN_MPY_DIR=freeze clean dfu-gen dfu-flash
+	@echo "===> Flashing entrypoint if it doesn't already exist"
+	@sleep 2
+	@-timeout -k 5s 10s pipenv run ampy rm main.py 2>/dev/null
+	@timeout -k 5s 10s pipenv run ampy put entrypoints/feather_nrf52832.py main.py
+	@echo "===> Flashed keyboard successfully!"
 
-oh-god-everything-is-stuck: lint devdeps
-	@echo "===> Building a keyboard that explicitly CANNOT import KMK. Assuming your infinite-looping keyboard script imported KMK, it will now fail and be wiped. Cheers!"
+# Fully wipe the board with only stock CircuitPython
+burn-it-all-with-fire: lint devdeps
+	@echo "===> Flashing STOCK CircuitPython with no KMK or user keyboard scripts, and wiping entrypoint"
+	@echo "===> This is the nuclear option. Ctrl-C to cancel, or any key to continue"
+	@read
 	@echo "===> Pulling dependencies, this may take several minutes"
 	@git submodule update --init --recursive
 	@echo "===> Building circuitpython/mpy-cross"
 	@make -C vendor/circuitpython/mpy-cross
 	@echo "===> Pulling Nordic BLE stack"
-	@cd vendor/circuitpython/ports/nrf && ./drivers/bluetooth/download_ble_stack.sh 2>/dev/null
+	@cd vendor/circuitpython/ports/nrf && ./drivers/bluetooth/download_ble_stack.sh 2>/dev/null >/dev/null
 	@echo "===> Preparing KMK source for bundling into CircuitPython"
 	@rm -rf vendor/circuitpython/ports/nrf/freeze/kmk
-	@echo "===> Building CircuitPython WITHOUT KMK to induce ImportError"
-	make -C vendor/circuitpython/ports/nrf BOARD=feather_nrf52832 SERIAL=/dev/ttyUSB0 SD=s132 FROZEN_MPY_DIR=freeze clean dfu-gen dfu-flash
+	@rm -rf vendor/circuitpython/ports/nrf/freeze/kmk_keyboard_user.py
+	@echo "===> Building CircuitPython WITHOUT KMK or user keyboard script to induce ImportError"
+	@make -C vendor/circuitpython/ports/nrf BOARD=feather_nrf52832 SERIAL=/dev/ttyUSB0 SD=s132 FROZEN_MPY_DIR=freeze clean dfu-gen dfu-flash
 	@echo "===> Wiping keyboard config"
-	sleep 2
-	pipenv run ampy rm main.py
-	@echo "===> Done! Fix your board script and retry flashing the right way"
+	@sleep 2
+	@-pipenv run ampy rm main.py 2>/dev/null
+	@echo "===> Wiped! Probably safe to flash keyboard, try Python serial REPL to verify?"

boards/klardotsh/twotwo_matrix_feather.py

@@ -1,12 +1,11 @@
 import board
-import time
 
 from kmk.circuitpython.matrix import MatrixScanner
 from kmk.common.consts import DiodeOrientation
 from kmk.common.keymap import Keymap
 
 
-if __name__ == '__main__':
+def main():
     cols = (board.A4, board.A5)
     rows = (board.D27, board.A6)
 
@@ -22,5 +21,3 @@ if __name__ == '__main__':
 
     while True:
         keymap.parse(matrix.raw_scan())
-        # Yield to the controller to allow things like the REPL to take over
-        time.sleep(0.001)

entrypoints/feather_nrf52832.py

@@ -0,0 +1,5 @@
+from kmk_keyboard_user import main
+
+
+if __name__ == '__main__':
+    main()