Able to build a VERY basic KMK image for Feather M4 Express, flashable over UF2 only

user_keymaps/klardotsh/feather_m4_express/fourfour.py

@@ -0,0 +1,74 @@
+import board
+
+from kmk.common.consts import DiodeOrientation, UnicodeModes
+from kmk.common.keycodes import KC
+from kmk.common.macros.simple import send_string, simple_key_sequence
+from kmk.common.macros.unicode import unicode_sequence
+from kmk.entrypoints.handwire.feather_m4_express import main
+from kmk.firmware import Firmware
+
+cols = (board.D11, board.D10, board.D9)
+rows = (board.A2, board.A3, board.A4, board.A5)
+
+diode_orientation = DiodeOrientation.COLUMNS
+unicode_mode = UnicodeModes.LINUX
+
+MACRO_TEST_SIMPLE = simple_key_sequence([
+    KC.LSHIFT(KC.H),
+    KC.E,
+    KC.L,
+    KC.L,
+    KC.O,
+
+    KC.SPACE,
+
+    KC.MACRO_SLEEP_MS(500),
+
+    KC.LSHIFT(KC.K),
+    KC.LSHIFT(KC.M),
+    KC.LSHIFT(KC.K),
+    KC.EXCLAIM,
+])
+
+MACRO_TEST_STRING = send_string("Hello! from, uhhhh, send_string | and some other WEIRD STUFF`  \\ like this' \"\t[]")
+
+ANGRY_TABLE_FLIP = unicode_sequence([
+    "28",
+    "30ce",
+    "ca0",
+    "75ca",
+    "ca0",
+    "29",
+    "30ce",
+    "5f61",
+    "253b",
+    "2501",
+    "253b",
+])
+
+keymap = [
+    [
+        [KC.GESC,              KC.A,     KC.RESET],
+        [KC.MO(1),             KC.B,     KC.C],
+        [KC.LT(2, KC.EXCLAIM), KC.HASH,  KC.ENTER],
+        [KC.TT(3),             KC.SPACE, KC.LSHIFT],
+    ],
+    [
+        [KC.TRNS, KC.B, KC.C],
+        [KC.NO,   KC.D, KC.E],
+        [KC.F,    KC.G, KC.H],
+        [KC.I,    KC.J, KC.K],
+    ],
+    [
+        [KC.VOLU, KC.MUTE, ANGRY_TABLE_FLIP],
+        [KC.TRNS, KC.PIPE, MACRO_TEST_SIMPLE],
+        [KC.VOLD, KC.P,    MACRO_TEST_STRING],
+        [KC.L,    KC.M,    KC.N],
+    ],
+    [
+        [KC.NO,   KC.UC_MODE_NOOP,  KC.C],
+        [KC.NO,   KC.UC_MODE_LINUX, KC.E],
+        [KC.TRNS, KC.UC_MODE_MACOS, KC.H],
+        [KC.O,    KC.P,             KC.Q],
+    ],
+]