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Disable USB devices in CircuitPython in boot.py
# circuitpython_disable_usb_boot.py
# Turn on/off certain USB features based on touching RX & TX pins
# Squeeze TX & RX pins with fingers to enable CIRCUITPY & REPL
# Otherwise, they are turned off
# CircuitPython 7.x only
# Rename this as "boot.py" in your CIRCUITPY drive on a QT PY
# @todbot 17 May 2021
import time
import board
import neopixel
import touchio
print("hello from boot.py") # see this in 'boot_out.txt'
led = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2)
touch1in = touchio.TouchIn(board.RX)
touch2in = touchio.TouchIn(board.TX)
if touch1in.raw_value > 1500 and touch2in.raw_value > 1500:
print("both RX & TX touched! Keeping ON USB devices")
for i in range(5): # blink LED
led[0] = 0x00ff00
time.sleep(0.1)
led[0] = 0x000000
time.sleep(0.1)
# or enable just certain HID devices
#import usb_hid
#usb_hid.enable(devices=(usb_hid.Device.MOUSE,))
#usb_hid.enable(devices=(usb_hid.Device.KEYBOARD))
#usb_hid.enable(devices=(usb_hid.Device.CONSUMER_CONTROL,))
else:
print("RX & TX not touched. Turning OFF USB devices")
import storage
import usb_cdc
import usb_midi
storage.disable_usb_drive() # disable CIRCUITPY
usb_cdc.disable() # disable REPL
usb_midi.disable() # disable MIDI
#import usb_hid
#usb_hid.disable() # could also disable HID
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