# Keyboard Emulator Using a Pi Pico and CircuitPython
# Additional Libraries: adafruit_hid
# https://github.com/adafruit/Adafruit_CircuitPython_HID

# Original code: 2018 Kattni Rembor for Adafruit Industries (MIT License)
# Updated version: 2026 Steve McL for Iffy Books (wtfpl)
# https://iffybooks.net/diy-macro-keyboard

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

time.sleep(1)  # Sleep to avoid race conditions

# The keyboard object
keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard)  # US keyboard layout

gpio_pin_dict = {0: [board.GP0, Keycode.FIVE],
                1: [board.GP1, Keycode.F],
                2: [board.GP2, Keycode.B], 
                3: [board.GP3, Keycode.D], 
                4: [board.GP4, [Keycode.SHIFT,Keycode.LEFT_ARROW]], 
                5: [board.GP5, [Keycode.SHIFT,Keycode.RIGHT_ARROW]], 
                6: [board.GP6, Keycode.F1], 
                7: [board.GP7, Keycode.F2], 
                8: [board.GP8, Keycode.H], 
                9: [board.GP9, Keycode.G], 
                10: [board.GP10, Keycode.ZERO], 
                11: [board.GP11, Keycode.N], 
                12: [board.GP12, Keycode.SEMICOLON], 
                13: [board.GP13, Keycode.L], 
                14: [board.GP14, Keycode.F5], 
                15: [board.GP15, Keycode.F6], 
                16: [board.GP16, Keycode.F8], 
                17: [board.GP17, Keycode.F7], 
                18: [board.GP18, ""], 
                19: [board.GP19, Keycode.P], 
                20: [board.GP20, Keycode.DOWN_ARROW], 
                21: [board.GP21, Keycode.UP_ARROW], 
                22: [board.GP22, Keycode.SIX], 
                26: [board.GP26, Keycode.ONE], 
                27: [board.GP27, Keycode.F4], 
                28: [board.GP28, Keycode.F3]
                }

for pin_number in gpio_pin_dict:
    pin = gpio_pin_dict[pin_number][0]
    key_pin = digitalio.DigitalInOut(pin)
    key_pin.direction = digitalio.Direction.INPUT
    key_pin.pull = digitalio.Pull.UP
    gpio_pin_dict[pin_number].append(key_pin)

led = digitalio.DigitalInOut(board.GP25)
led.direction = digitalio.Direction.OUTPUT
led.value = False

# Infinite loop checking whether a key is pressed
while True:
    for pin_number in gpio_pin_dict:
        key_pin = gpio_pin_dict[pin_number][2]
        if not key_pin.value:
            keycode = gpio_pin_dict[pin_number][1]
            
            try: keyboard.press(keycode)
            except: keyboard.press(keycode[0],keycode[1])
            time.sleep(0.2)
            keyboard.release_all()