#ifndef KEYMAP_H
-#define KEYMAP_H 1
+#define KEYMAP_H
#include <stdint.h>
+#include <stdbool.h>
#include "usb_keycodes.h"
-int get_layer(void);
-uint8_t get_keycode(int layer, int row, int col);
-#define MATRIX_ROWS 9
-#define MATRIX_COLS 8
+/* keycode in specific layer */
+uint8_t keymap_get_keycode(uint8_t layer, uint8_t row, uint8_t col);
+
+/* layer to move during press Fn key */
+uint8_t keymap_fn_layer(uint8_t fn_bits);
+
+/* keycode to send when release Fn key without using */
+uint8_t keymap_fn_keycode(uint8_t fn_bits);
#endif