Adding Pimoroni Keybow and Keybow 2040

boards/pimoroni/keybow_2040/code.py

@@ -0,0 +1,20 @@
+from keybow_2040 import Keybow2040
+
+from kmk.keys import KC
+
+keybow = Keybow2040()
+
+# fmt: off
+keybow.keymap = [
+    [
+        KC.A, KC.B, KC.C, KC.D,
+        KC.E, KC.F, KC.G, KC.H,
+        KC.I, KC.J, KC.K, KC.L,
+        KC.M, KC.N, KC.O, KC.P,
+        KC.Q
+    ]
+]
+# fmt: on
+
+if __name__ == '__main__':
+    keybow.go()

boards/pimoroni/keybow_2040/keybow_2040.py

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