37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
|
import storage
|
||
|
|
import board
|
||
|
|
import digitalio
|
||
|
|
|
||
|
|
# --- Configuration ---
|
||
|
|
# Set up the two pins we want to check
|
||
|
|
pin16 = digitalio.DigitalInOut(board.IO16)
|
||
|
|
pin16.direction = digitalio.Direction.INPUT
|
||
|
|
pin16.pull = digitalio.Pull.UP
|
||
|
|
|
||
|
|
pin17 = digitalio.DigitalInOut(board.IO17)
|
||
|
|
pin17.direction = digitalio.Direction.INPUT
|
||
|
|
pin17.pull = digitalio.Pull.UP
|
||
|
|
|
||
|
|
# --- Logic ---
|
||
|
|
# By default, the pull-up resistors hold the pins HIGH (True).
|
||
|
|
# If we short a pin to GND, its value will become LOW (False).
|
||
|
|
|
||
|
|
# We check if BOTH pins are HIGH.
|
||
|
|
# If they are, it's a "normal boot," so we hide the drive.
|
||
|
|
if pin16.value and pin17.value:
|
||
|
|
print("Normal boot: Disabling CIRCUITPY drive.")
|
||
|
|
storage.disable_usb_drive()
|
||
|
|
else:
|
||
|
|
# One of the pins was LOW (grounded), so we
|
||
|
|
# enable the drive for maintenance.
|
||
|
|
print("Storage boot: CIRCUITPY drive is ENABLED.")
|
||
|
|
# We don't need to call storage.enable_usb_drive()
|
||
|
|
# because it's enabled by default.
|
||
|
|
|
||
|
|
# Clean up the pins so they can be used in code.py if needed
|
||
|
|
pin16.deinit()
|
||
|
|
pin17.deinit()
|
||
|
|
|
||
|
|
# The boot.py file finishes, and CircuitPython will
|
||
|
|
# either mount the drive or not, based on what we did.
|
||
|
|
# After this, code.py will run.
|