Basic keymap mapping.

src/keymap.h

@@ -0,0 +1,21 @@
+#ifndef ZMK_KEYMAP_H
+#define ZMK_KEYMAP_H
+
+#include <devicetree.h>
+#include <usb/usb_device.h>
+#include <usb/class/usb_hid.h>
+
+// TODO: Pull these in fro a kscan_gpio.h file from Zephyr!
+//
+#define MATRIX_NODE_ID DT_PATH(kscan)
+#define MATRIX_ROWS DT_PROP_LEN(MATRIX_NODE_ID,row_gpios)
+#define MATRIX_COLS DT_PROP_LEN(MATRIX_NODE_ID,col_gpios)
+
+enum hid_kbd_code keymap[MATRIX_ROWS][MATRIX_COLS] = {
+	{ HID_KEY_A, HID_KEY_B },
+	{ HID_KEY_C, HID_KEY_D }
+};
+
+#define zmk_keymap_keycode_from_position(row, column) keymap[row][column]
+
+#endif