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code.py
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code.py
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from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode
import board
from keybow2040 import Keybow2040
import usb_hid
# Set up Keybow
i2c = board.I2C()
keybow = Keybow2040(i2c)
keys = keybow.keys
# Set up keyboard
keyboard = Keyboard(usb_hid.devices)
layout = KeyboardLayoutUS(keyboard)
# Define colours
colours = dict(
off=(0, 0, 0),
white=(255, 255, 255),
red=(255, 0, 0),
green=(0, 255, 0),
blue=(0, 0, 255),
cyan=(0, 255, 255),
yellow=(255, 255, 0),
magenta=(255, 0, 255),
violet=(128, 0, 255),
orange=(255, 128, 0)
)
# Kodi keyboard controls
# https://kodi.wiki/view/Keyboard_controls
kodi_keymap = {
"context menu": Keycode.C,
"information": Keycode.I,
"select": Keycode.ENTER,
"menu": Keycode.M,
"back": Keycode.BACKSPACE,
"right": Keycode.RIGHT_ARROW,
"up": Keycode.UP_ARROW,
"left": Keycode.LEFT_ARROW,
"down": Keycode.DOWN_ARROW,
"vol+": Keycode.EQUALS,
"vol-": Keycode.MINUS,
"mute": Keycode.F8,
"play/pause": Keycode.SPACE,
"fast forward": Keycode.F,
"rewind": Keycode.R,
"stop": Keycode.X,
"toggle subtitles": Keycode.T,
"next subtitle": Keycode.L,
"shutdown menu": Keycode.S
}
# Define action and layer selection keys
# Keypad numbers
# | 3 | 7 | 11 | 15 |
# | 2 | 6 | 10 | 14 |
# | 1 | 5 | 9 | 13 |
# | 0 | 4 | 8 | 12 |
def set_key_colours():
for key, colour in enumerate(layers[layer].colours):
scaled_colour = (int(elem*brightness/10) for elem in colour)
keybow.set_led(key, *scaled_colour)
def increase_brightness():
global brightness
brightness += 1
if brightness > 10:
brightness = 10
set_key_colours()
def decrease_brightness():
global brightness
brightness -= 1
if brightness < 1:
brightness = 1
set_key_colours()
def select_layer(layer_no):
def set_layer():
global layer
layer = layer_no
set_key_colours()
return set_layer
# Layer class
class Layer():
def __init__(self, key_specification):
# key_specification is an ordered list of key definitions.
# The items of key_specification can be None for an unused key or a
# tuple of (action, colour) where action is a keycode(int), tuple of
# keycodes or function and colour is a tuple of three integers 0-255
# representing the red, green and blue channels respectively.
# Initialise actions and colours
self.keys = []
self.colours = []
for key_no, item in enumerate(key_specification):
if item is None:
# Empty key
self.keys.append(None)
self.colours.append(colours["off"])
elif isinstance(item, tuple):
# Assign key action and colour
action, colour = item
self.keys.append(action)
self.colours.append(colour)
# Define layers
layers = [
# Layer mimicking Kodi Kore app remote plus volume
# | context | up | information | vol+ |
# | left | select | right | vol- |
# | back | down | menu | mute |
Layer(
[
(select_layer(0), colours["green"]),
(kodi_keymap["back"], colours["violet"]),
(kodi_keymap["left"], colours["blue"]),
(kodi_keymap["context menu"], colours["violet"]),
(select_layer(1), colours["orange"]),
(kodi_keymap["down"], colours["blue"]),
(kodi_keymap["select"], colours["yellow"]),
(kodi_keymap["up"], colours["blue"]),
(select_layer(2), colours["orange"]),
(kodi_keymap["menu"], colours["violet"]),
(kodi_keymap["right"], colours["blue"]),
(kodi_keymap["information"], colours["violet"]),
(select_layer(3), colours["orange"]),
(kodi_keymap["mute"], colours["red"]),
(kodi_keymap["vol-"], colours["cyan"]),
(kodi_keymap["vol+"], colours["green"])
]
),
# Playback control layer
# | toggle subtitles | next subtitle | | vol+ |
# | play/pause | stop | | vol- |
# | rewind | fast forward | | mute |
Layer(
[
(select_layer(0), colours["orange"]),
(kodi_keymap["rewind"], colours["blue"]),
(kodi_keymap["play/pause"], colours["green"]),
(kodi_keymap["toggle subtitles"], colours["yellow"]),
(select_layer(1), colours["green"]),
(kodi_keymap["fast forward"], colours["blue"]),
(kodi_keymap["stop"], colours["red"]),
(kodi_keymap["next subtitle"], colours["magenta"]),
(select_layer(2), colours["orange"]),
None,
None,
None,
(select_layer(3), colours["orange"]),
(kodi_keymap["mute"], colours["red"]),
(kodi_keymap["vol-"], colours["cyan"]),
(kodi_keymap["vol+"], colours["green"])
]
),
# System layer
Layer(
[
(select_layer(0), colours["orange"]),
None,
None,
(kodi_keymap["shutdown menu"], colours["red"]),
(select_layer(1), colours["orange"]),
None,
None,
None,
(select_layer(2), colours["green"]),
None,
(
(Keycode.CONTROL, Keycode.ALT, Keycode.RIGHT_ARROW),
colours["blue"]
),
(
(Keycode.CONTROL, Keycode.ALT, Keycode.LEFT_ARROW),
colours["blue"]
),
(select_layer(3), colours["orange"]),
None,
(decrease_brightness, colours["cyan"]),
(increase_brightness, colours["green"])
]
),
# Empty layer
Layer(
[
(select_layer(0), colours["orange"]),
None,
None,
None,
(select_layer(1), colours["orange"]),
None,
None,
None,
(select_layer(2), colours["orange"]),
None,
None,
None,
(select_layer(3), colours["green"]),
None,
None,
None
]
)
]
for key in keys:
@keybow.on_press(key)
def press_handler(key):
action = layers[layer].keys[key.number]
# Catch elements of Keycode
if isinstance(action, int):
keyboard.send(action)
# Try to Catch a tuple of Keycodes
elif isinstance(action, tuple):
keyboard.send(*action)
# Try to catch functions, not perfect as non-functions may be callable
elif callable(action):
action()
# Set defaults
layer = 0
# brightness [1,10]. Raw colour values are multiplied by brightness/10 and
# rounded so that 10 represents 100% brightness and 1 10%.
brightness = 5
while True:
keybow.update()