feat(extensions): most of the extensions implementation, by kdb424

boards/keebio/iris/kb.py

@@ -0,0 +1,43 @@
+import board
+
+from kmk.kmk_keyboard import KMKKeyboard as _KMKKeyboard
+from kmk.matrix import DiodeOrientation
+from kmk.matrix import intify_coordinate as ic
+
+
+class KMKKeyboard(_KMKKeyboard):
+    row_pins = (board.P1_00, board.P0_11, board.P1_04, board.P0_08, board.P0_22)
+    col_pins = (
+        board.P0_02,
+        board.P1_15,
+        board.P1_13,
+        board.P1_11,
+        board.P0_10,
+        board.P0_09,
+    )
+    diode_orientation = DiodeOrientation.COLUMNS
+    led_pin = board.P1_06
+    rgb_pixel_pin = board.P0_06
+    rgb_num_pixels = 12
+    i2c = board.I2C
+    data_pin = board.P0_08
+    powersave_pin = board.P0_13
+    led_pin = board.D7
+
+    coord_mapping = []
+    coord_mapping.extend(ic(0, x) for x in range(12))
+    coord_mapping.extend(ic(1, x) for x in range(12))
+    coord_mapping.extend(ic(2, x) for x in range(12))
+
+    # Buckle up friends, the bottom row of this keyboard is wild, and making
+    # our layouts match, visually, what the keyboard looks like, requires some
+    # surgery on the bottom two rows of coords
+
+    # Row index 3 is actually perfectly sane and we _could_ expose it
+    # just like the above three rows, however, visually speaking, the
+    # top-right thumb cluster button (when looking at the left-half PCB)
+    # is more inline with R3, so we'll jam that key (and its mirror) in here
+    coord_mapping.extend(ic(3, x) for x in range(6))
+    coord_mapping.append(ic(4, 2))
+    coord_mapping.append(ic(4, 9))
+    coord_mapping.extend(ic(3, x) for x in range(6, 12))  # Now, the rest of R3