Teensy 3.1 support

.gitmodules

@@ -10,3 +10,5 @@
 [submodule "micropython"]
 	path = vendor/micropython
 	url = https://github.com/micropython/micropython.git
+	branch = "3cd2c281d7cf990b3afb78287a58cf4ee3f23ca5"
+	ignore = dirty

Makefile

@@ -28,25 +28,50 @@ lint: devdeps
 	@cd vendor/circuitpython/ports/nrf && ./drivers/bluetooth/download_ble_stack.sh 2>/dev/null >/dev/null
 	@touch .circuitpy-deps
 
+.micropython-deps: .submodules
+	@echo "===> Building micropython/mpy-cross"
+	@make -C vendor/micropython/mpy-cross
+	@touch .circuitpy-deps
+
 circuitpy-deps: .circuitpy-deps
 
+micropython-deps: .micropython-deps
+
 freeze-nrf-vendor-deps: vendor/circuitpython/ports/nrf/freeze/.kmk_frozen
 
+freeze-teensy3.1-vendor-deps: vendor/micropython/ports/teensy/freeze/.kmk_frozen
+
 vendor/circuitpython/ports/nrf/freeze/.kmk_frozen: upy-freeze.txt
 	@echo "===> Preparing vendored dependencies for bundling"
 	@rm -rf vendor/circuitpython/ports/nrf/freeze/*
 	@cat $< | xargs -I '{}' cp -a {} vendor/circuitpython/ports/nrf/freeze/
 	@touch $@
 
+vendor/micropython/ports/teensy/freeze/.kmk_frozen: upy-freeze.txt
+	@echo "===> Preparing vendored dependencies for bundling"
+	@mkdir vendor/micropython/ports/teensy/freeze/
+	@rm -rf vendor/micropython/ports/teensy/freeze/*
+	@cat $< | xargs -I '{}' cp -a {} vendor/micropython/ports/teensy/freeze/
+	@touch $@
+
 circuitpy-freeze-kmk-nrf: freeze-nrf-vendor-deps
 	@echo "===> Preparing KMK source for bundling into CircuitPython"
 	@rm -rf vendor/circuitpython/ports/nrf/kmk*
 	@cp -av kmk vendor/circuitpython/ports/nrf/freeze/
 
+micropython-freeze-kmk-teensy3.1: freeze-teensy3.1-vendor-deps
+	@echo "===> Preparing KMK source for bundling into MicroPython"
+	@rm -rf vendor/micropython/ports/teensy/kmk*
+	@cp -av kmk vendor/micropython/ports/teensy/memzip_files/
+
 circuitpy-flash-nrf:
 	@echo "===> Building and flashing CircuitPython with KMK and your keymap"
 	@make -C vendor/circuitpython/ports/nrf BOARD=feather_nrf52832 SERIAL=${NRF_DFU_PORT} SD=s132 FROZEN_MPY_DIR=freeze clean dfu-gen dfu-flash
 
+micropython-flash-teensy3.1:
+	@cp entrypoints/teensy31.py vendor/micropython/ports/teensy/memzip_files/main.py
+	@make -C vendor/micropython/ports/teensy/ BOARD=TEENSY_3.1 deploy
+
 circuitpy-flash-nrf-entrypoint:
 	@echo "===> Flashing entrypoint if it doesn't already exist"
 	@sleep 2
@@ -64,6 +89,16 @@ build-feather-nrf52832: lint devdeps circuitpy-deps circuitpy-freeze-kmk-nrf
 	@$(MAKE) circuitpy-flash-nrf circuitpy-flash-nrf-entrypoint
 endif
 
+ifndef BOARD
+build-teensy-3.1:
+	@echo "===> Must provide a board (usually from boards/...) to build!"
+else
+build-teensy-3.1: lint devdeps micropython-deps micropython-freeze-kmk-teensy3.1
+	@echo "===> Preparing keyboard script for bundling into MicroPython"
+	@cp -av ${BOARD} vendor/micropython/ports/teensy/freeze/kmk_keyboard_user.py
+	@$(MAKE) micropython-flash-teensy3.1
+endif
+
 # 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"

entrypoints/teensy31.py

@@ -0,0 +1,10 @@
+import sys
+
+from kmk_keyboard_user import main
+
+if __name__ == '__main__':
+    try:
+        main()
+    except Exception as e:
+        sys.print_exception(e)
+        sys.exit(1)