77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
'''
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KMK keyboard for Pimoroni Keybow 2040.
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This is a 4x4 macro pad based on the RP2040. Each key is attached to a single
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GPIO, so the KMK matrix scanner needs to be overridden. Additionally, each
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key has an RGB LED controlled by an IS31FL3731 controller which is incompatible
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with the default RGB module.
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The layout of the board is as follows:
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[RESET] [USB-C] [BOOT]
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R0 | SW3 SW7 SW11 SW15
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R1 | SW2 SW6 SW10 SW14
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R2 | SW1 SW5 SW9 SW13
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R3 | SW0 SW4 SW8 SW12
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-----------------------------
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C0 C1 C2 C3
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The binding defined in the _KEY_CFG array binds the switches to keys such that
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the keymap can be written in a way that lines up with the natural order of the
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key switches, then adds [BOOT] in (4,0). [RESET] can't be mapped as a key.
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'''
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import board
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from adafruit_is31fl3731.keybow2040 import Keybow2040 as KeybowLeds
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from adafruit_pixelbuf import PixelBuf
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# from kmk.extensions.rgb import RGB
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from kmk.kmk_keyboard import KMKKeyboard
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from kmk.scanners.native_keypad_scanner import keys_scanner
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# fmt: off
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_KEY_CFG = [
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[board.SW3, board.SW7, board.SW11, board.SW15],
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[board.SW2, board.SW6, board.SW10, board.SW14],
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[board.SW1, board.SW5, board.SW9, board.SW13],
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[board.SW0, board.SW4, board.SW8, board.SW12],
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[board.USER_SW],
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]
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# fmt: on
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class Keybow2040Leds(PixelBuf):
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'''
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Minimal PixelBuf wrapper for the Keybow 2040's LED array.
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NOTE: Currently broken.
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'''
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def __init__(self, size: int):
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self.leds = KeybowLeds(board.I2C)
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super().__init__(size, byteorder='RGB')
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def _transmit(self, buffer):
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for pixel in range(self._pixels):
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r = buffer[pixel * 3 + 0]
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g = buffer[pixel * 3 + 1]
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b = buffer[pixel * 3 + 2]
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self.leds.pixel(pixel // 4, pixel % 4, (r, g, b))
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# rgb_ext = RGB(0, pixels=Keybow2040Leds(16), num_pixels=16)
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class Keybow2040(KMKKeyboard):
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'''
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Default keyboard config for the Keybow2040.
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TODO: Map the LEDs as well.
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'''
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# extensions = [rgb_ext]
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def __init__(self):
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self.matrix = keys_scanner(_KEY_CFG)
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