1  # SPDX-FileCopyrightText: 2020 Phillip Burgess for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """
 6  Check for connection between pin and GND on hard boot (power-on or reset).
 7  If NO connection: storage is remounted as read/write so the light painter
 8  code can run (it requires temporary files), but code.py can't be edited.
 9  If connected: storage is left in read-only mode. Light painter code can't
10  run but files are editable.
11  """
12  
13  # pylint: disable=import-error
14  import board
15  import digitalio
16  import storage
17  
18  PIN = board.D0
19  
20  IO = digitalio.DigitalInOut(PIN)
21  IO.direction = digitalio.Direction.INPUT
22  IO.pull = digitalio.Pull.UP
23  
24  if IO.value:                    # No connection
25      storage.remount('/', False) # Remount storage as read/write for painter