code.py for ultimate unicode input device

code.py

import time
import board
import digitalio
from adafruit_debouncer import Debouncer
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode

TOGGLE_PINS = [
    board.GP0,
    board.GP1,
    board.GP2,
    board.GP3,
    board.GP4,
    board.GP5,
    board.GP6,
    board.GP7,
    board.GP8,
    board.GP9,
    board.GP10,
    board.GP11,
    board.GP12,
    board.GP13,
    board.GP14,
    board.GP15,
    board.GP16,
    board.GP17,
]

ENTER_PIN = board.GP18


def initializeDebouncer(pin_name):
    pin = digitalio.DigitalInOut(pin_name)
    pin.direction = digitalio.Direction.INPUT
    pin.pull = digitalio.Pull.UP
    return Debouncer(pin)

def send_linux(value):
    keyboard.press(Keycode.LEFT_CONTROL, Keycode.LEFT_SHIFT, Keycode.U)
    time.sleep(0.05)
    keyboard.release_all()
    keyboard_layout.write('{:05x} '.format(value))

def send_win(value):
    keyboard.press(Keycode.ALT)
    time.sleep(0.05)
    keyboard.release_all()
    keyboard_layout.write('u{:05x} '.format(value))

toggles = list(map(initializeDebouncer, TOGGLE_PINS))
enter = initializeDebouncer(ENTER_PIN)

time.sleep(1)
keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard)

prev_fell_time = 0.0;
sended = False;

while True:
    toggle_value = 0
    for sw in toggles:
        sw.update()
        toggle_value = toggle_value << 1
        toggle_value += sw.value == False if 1 else 0

    enter.update()

    if enter.fell:
        prev_fell_time = time.monotonic();
        continue
    elif enter.rose:
        if sended:
            sended = False
            continue
    elif enter.value == False and sended == False and time.monotonic() - prev_fell_time > 0.5:        
        # long press
        toggle_value = 0xE0000 + (toggle_value & 0xFFFF)
        sended = True
    else:
        continue

    # debug
    # print('0b{:#018b}'.format(toggle_value)) 
    # print('0x{:05x}'.format(toggle_value))
    send_win(toggle_value)
    # send_linux(toggle_value)