1  # SPDX-FileCopyrightText: 2021 John Park for Adafruit Industries
  2  # SPDX-License-Identifier: MIT
  3  # RaspberryPi Pico RP2040 Mechanical Keyboard
  4  
  5  import time
  6  import board
  7  from digitalio import DigitalInOut, Direction, Pull
  8  import usb_hid
  9  from adafruit_hid.keyboard import Keyboard
 10  from adafruit_hid.keycode import Keycode
 11  from adafruit_hid.consumer_control import ConsumerControl
 12  from adafruit_hid.consumer_control_code import ConsumerControlCode
 13  
 14  print("---Pico Pad Keyboard---")
 15  
 16  led = DigitalInOut(board.LED)
 17  led.direction = Direction.OUTPUT
 18  led.value = True
 19  
 20  kbd = Keyboard(usb_hid.devices)
 21  cc = ConsumerControl(usb_hid.devices)
 22  
 23  # list of pins to use (skipping GP15 on Pico because it's funky)
 24  pins = (
 25      board.GP0,
 26      board.GP1,
 27      board.GP2,
 28      board.GP3,
 29      board.GP4,
 30      board.GP5,
 31      board.GP6,
 32      board.GP7,
 33      board.GP8,
 34      board.GP9,
 35      board.GP10,
 36      board.GP11,
 37      board.GP12,
 38      board.GP13,
 39      board.GP14,
 40      board.GP16,
 41      board.GP17,
 42      board.GP18,
 43      board.GP19,
 44      board.GP20,
 45      board.GP21,
 46  )
 47  
 48  MEDIA = 1
 49  KEY = 2
 50  
 51  keymap = {
 52      (0): (KEY, (Keycode.GUI, Keycode.C)),
 53      (1): (KEY, (Keycode.GUI, Keycode.V)),
 54      (2): (KEY, [Keycode.THREE]),
 55      (3): (KEY, [Keycode.FOUR]),
 56      (4): (KEY, [Keycode.FIVE]),
 57      (5): (MEDIA, ConsumerControlCode.VOLUME_DECREMENT),
 58      (6): (MEDIA, ConsumerControlCode.VOLUME_INCREMENT),
 59  
 60      (7): (KEY, [Keycode.R]),
 61      (8): (KEY, [Keycode.G]),
 62      (9): (KEY, [Keycode.B]),
 63      (10): (KEY, [Keycode.UP_ARROW]),
 64      (11): (KEY, [Keycode.X]),  # plus key
 65      (12): (KEY, [Keycode.Y]),
 66      (13): (KEY, [Keycode.Z]),
 67  
 68      (14): (KEY, [Keycode.I]),
 69      (15): (KEY, [Keycode.O]),
 70      (16): (KEY, [Keycode.LEFT_ARROW]),
 71      (17): (KEY, [Keycode.DOWN_ARROW]),
 72      (18): (KEY, [Keycode.RIGHT_ARROW]),
 73      (19): (KEY, [Keycode.ALT]),
 74      (20): (KEY, [Keycode.U]),
 75  
 76  }
 77  
 78  switches = []
 79  for i in range(len(pins)):
 80      switch = DigitalInOut(pins[i])
 81      switch.direction = Direction.INPUT
 82      switch.pull = Pull.UP
 83      switches.append(switch)
 84  
 85  
 86  switch_state = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
 87  
 88  while True:
 89      for button in range(21):
 90          if switch_state[button] == 0:
 91              if not switches[button].value:
 92                  try:
 93                      if keymap[button][0] == KEY:
 94                          kbd.press(*keymap[button][1])
 95                      else:
 96                          cc.send(keymap[button][1])
 97                  except ValueError:  # deals w six key limit
 98                      pass
 99                  switch_state[button] = 1
100  
101          if switch_state[button] == 1:
102              if switches[button].value:
103                  try:
104                      if keymap[button][0] == KEY:
105                          kbd.release(*keymap[button][1])
106  
107                  except ValueError:
108                      pass
109                  switch_state[button] = 0
110  
111      time.sleep(0.01)  # debounce