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MatrixPortal M4 up/down switch to toggle filesystem read-only/write modes
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| # This script allows the MatrixPortal M4 to switch between: | |
| # 1. readonly mode: write to drive when connected to computer over USB C (Down button) | |
| # 2. write mode: CircuitPython can write to itself (Up button) | |
| # Useful when developing code to pair Wifi networks. | |
| # Think of "down" button as developer mode (code cannot write to file system) | |
| # and "up" button as production: (code can write to file system) | |
| # | |
| # After hitting "reset" button twice, or reconnecting USB-C cable: | |
| # neopixel will flash orange three times, then teal when accepting up/down button press | |
| # blue indicates readonly mode | |
| # green indicates write mode | |
| import board | |
| import busio | |
| from digitalio import DigitalInOut, Pull | |
| import displayio | |
| import neopixel | |
| import storage | |
| import terminalio | |
| import time | |
| from adafruit_debouncer import Debouncer | |
| LISTEN_TIMEOUT_SECONDS = 5 | |
| def listen_for_up_down_button_press(): | |
| pin_down = DigitalInOut(board.BUTTON_DOWN) | |
| pin_down.switch_to_input(pull=Pull.UP) | |
| button_down = Debouncer(pin_down) | |
| pin_up = DigitalInOut(board.BUTTON_UP) | |
| pin_up.switch_to_input(pull=Pull.UP) | |
| button_up = Debouncer(pin_up) | |
| status_light = neopixel.NeoPixel( | |
| board.NEOPIXEL, 1, brightness=0.1 | |
| ) | |
| start_time = time.time() | |
| status_light.fill((0, 150, 150)) | |
| status_light.show() | |
| # down to toggle dev mode (readonly true) | |
| # up to toggle circuitpython write access | |
| while True: | |
| button_down.update() | |
| button_up.update() | |
| if button_up.fell: | |
| status_light.fill((0, 200, 0)) | |
| status_light.show() | |
| print('remounting to readonly false') | |
| storage.remount('/', readonly=False) | |
| time.sleep(1) | |
| status_light.fill((0, 0, 0)) | |
| break | |
| elif button_down.fell: | |
| print('remounting to readonly true') | |
| status_light.fill((0, 0, 200)) | |
| status_light.show() | |
| storage.remount('/', readonly=True) | |
| time.sleep(1) | |
| status_light.fill((0, 0, 0)) | |
| break | |
| elif time.time() - start_time > LISTEN_TIMEOUT_SECONDS: | |
| print('no up/down presses detected') | |
| status_light.fill((0, 0, 0)) | |
| break | |
| listen_for_up_down_button_press() |
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