1  # SPDX-FileCopyrightText: 2021 john park for Adafruit Industries
 2  # SPDX-License-Identifier: MIT
 3  # Pico Four Key USB HID Keypad
 4  
 5  import board
 6  from digitalio import DigitalInOut, Pull
 7  from adafruit_debouncer import Debouncer
 8  import usb_hid
 9  from adafruit_hid.keyboard import Keyboard
10  from adafruit_hid.keycode import Keycode
11  
12  kpd = Keyboard(usb_hid.devices)
13  
14  # Choose the correct modifier key for Windows or Mac.
15  # Comment one line and uncomment the other.
16  # MODIFIER = Keycode.CONTROL  # For Windows
17  MODIFIER = Keycode.COMMAND  # For Mac
18  
19  # define buttons
20  NUM_KEYS = 4
21  PINS = (
22      board.GP0,
23      board.GP1,
24      board.GP2,
25      board.GP3,
26  )
27  
28  KEYMAP = (
29      ("Select all", [MODIFIER, Keycode.A]),
30      ("Cut", [MODIFIER, Keycode.X]),
31      ("Copy", [MODIFIER, Keycode.C]),
32      ("Paste", [MODIFIER, Keycode.V]),
33  )
34  
35  keys = []
36  for pin in PINS:
37      dio = DigitalInOut(pin)
38      dio.pull = Pull.UP
39      keys.append(Debouncer(dio))
40  
41  print("\nWelcome to keypad")
42  print("keymap:")
43  for k in range(NUM_KEYS):
44      print("\t", (KEYMAP[k][0]))
45  
46  
47  while True:
48      for i in range(NUM_KEYS):
49          keys[i].update()
50          if keys[i].fell:
51              print(KEYMAP[i][0])
52              kpd.send(*KEYMAP[i][1])