Support ItsyBitsy M4 Express as an effective clone of the Feather M4 Express with less pins. Because that's what it is.

user_keymaps/klardotsh/itsybitsy_m4_express/threethree.py

@@ -0,0 +1,65 @@
+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.itsybitsy_m4_express import main
+from kmk.firmware import Firmware
+
+cols = (board.A4, board.A5, board.D13)
+rows = (board.D12, board.D11, board.D10)
+
+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.MUTE],
+        [KC.LT(2, KC.EXCLAIM), KC.HASH,  KC.ENTER],
+    ],
+    [
+        [KC.MUTE, KC.B, KC.C],
+        [KC.TRNS,   KC.D, KC.E],
+        [KC.F,    KC.G, KC.H],
+    ],
+    [
+        [KC.VOLU, KC.MUTE, ANGRY_TABLE_FLIP],
+        [KC.NO, KC.PIPE, MACRO_TEST_SIMPLE],
+        [KC.TRNS, KC.P,    MACRO_TEST_STRING],
+    ],
+]