qmk-firmware/keyboards/dztech/dz60rgb/keymaps/hhkb_iso/keymap.c

#include QMK_KEYBOARD_H
extern bool g_suspend_state;
#define _LAYER0 0
#define _LAYER1 1
#define _LAYER2 2
#define _LAYER3 3
#define _LAYER4 4
#define _LAYER5 5
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
		[_LAYER0] = LAYOUT_HHKB_ISO( /* Base */
			      KC_GESC,         KC_1,    KC_2,    KC_3,    KC_4,    KC_5,     KC_6,   KC_7,   KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSLS,
			      KC_TAB,          KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,     KC_Y,   KC_U,   KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSPC,
				  CTL_T(KC_CAPS),  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,     KC_H,   KC_J,   KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_DEL,  KC_ENT,
			      KC_LSFT,         KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,     KC_N,   KC_M,   KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,          MO(2),
			      KC_LCTL,         KC_LGUI, KC_LALT,                   KC_SPACE,                                   KC_RALT, MO(1),            KC_RCTL),
		[_LAYER1] = LAYOUT_HHKB_ISO( /* FN */
				  KC_GRAVE, KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_TRNS,
	              KC_TRNS,  KC_TRNS,  KC_UP,    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_CALC,  KC_TRNS,  KC_INS,   KC_TRNS,  KC_PSCR,  KC_SLCK,  KC_PAUS,  RESET  ,\
			      KC_TRNS,  KC_LEFT,  KC_DOWN,  KC_RIGHT, KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_HOME,  KC_PGUP,  KC_TRNS,  KC_TRNS,\
			      KC_MPRV,  KC_VOLD,  KC_VOLU,  KC_MUTE,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_END,   KC_PGDOWN,KC_MNXT,            KC_TRNS,\
			      KC_TRNS,  KC_TRNS,  KC_TRNS,                      TO(3),                                            KC_TRNS,  KC_TRNS,            KC_TRNS),
		[_LAYER2] = LAYOUT_HHKB_ISO( /* LIGHT */
				  KC_TRNS,  KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_DEL ,\
			  	  KC_TRNS,  RGB_TOG,  KC_TRNS,  RGB_HUI,  RGB_HUD,  RGB_SAI,  RGB_SAD,  RGB_VAI,  RGB_VAD,  RGB_MOD,  KC_TRNS,  KC_TRNS,  KC_TRNS,  RESET  ,\
				  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  RGB_SPI,  RGB_SPD,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,\
				  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_TRNS,\
				  KC_TRNS,  KC_TRNS,  KC_TRNS,                      KC_TRNS,                                          KC_TRNS,  KC_TRNS,            KC_TRNS),
		[_LAYER3] = LAYOUT_HHKB_ISO( /* NUMPAD */
				  KC_GESC,       KC_1,     KC_2,     KC_3,  KC_4,  KC_5,  KC_6,    KC_7,    KC_8,    KC_9,   KC_0,    KC_MINS,  KC_EQL,  KC_BSPC,\
			      KC_TAB,        KC_Q,     KC_W,     KC_E,  KC_R,  KC_T,  KC_Y,    KC_U,    KC_I,    KC_O,   KC_P,    KC_LBRC,  KC_RBRC, KC_BSLASH,\
				  CTL_T(KC_CAPS),KC_A,     KC_S,     KC_D,  KC_F,  KC_G,  KC_H,    KC_J,    KC_K,    KC_L,   KC_SCLN, KC_QUOT,  KC_DEL,  KC_ENT, \
			      KC_LSFT,       KC_Z,     KC_X,     KC_C,  KC_V,  KC_B,  KC_N,    KC_M,    KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,           MO(4),\
			      KC_LCTL,       KC_LALT,  KC_LGUI,                KC_SPC,                                   MO(4),   KC_RGUI,           KC_RCTL),
		[_LAYER4] = LAYOUT_HHKB_ISO( /* MAC */
			  	  KC_GESC,  KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_DEL ,\
			      KC_TRNS,  RGB_TOG,  KC_TRNS,  RGB_HUI,  RGB_HUD,  RGB_SAI,  RGB_SAD,  RGB_VAI,  RGB_VAD,  RGB_MOD,  KC_PSCR,  KC_SLCK,  KC_PAUS,  RESET  ,\
			      KC_TRNS,  KC_LEFT,  KC_DOWN,  KC_UP,    KC_RIGHT, KC_TRNS,  KC_TRNS,  KC_TRNS,  RGB_SPI,  RGB_SPD,  KC_HOME,  KC_PGUP,  KC_TRNS,  KC_TRNS,\
				  KC_MPRV,  KC_VOLD,  KC_VOLU,  KC_MUTE,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_END,   KC_PGDOWN,KC_MNXT,            KC_TRNS,\
				  KC_TRNS,  KC_TRNS,  KC_TRNS,                      TO(0),                                            KC_TRNS,  KC_TRNS,            KC_TRNS),
		};

void rgb_matrix_layer_helper (uint8_t red, uint8_t green, uint8_t blue, bool default_layer) {
  rgb_led led;
  for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
    led = g_rgb_leds[i];
    if (led.matrix_co.raw < 0xFF) {
      if (led.modifier) {
          rgb_matrix_set_color( i, red, green, blue );
      }
    }
  }
}

void rgb_matrix_indicators_user(void) {
	  uint8_t this_led = host_keyboard_leds();
	  if (!g_suspend_state) {
	    switch (biton32(layer_state)) {
	      case _LAYER1:
		    rgb_matrix_layer_helper(0xFF, 0x00, 0x00, false); break;
	      case _LAYER2:
	        rgb_matrix_layer_helper(0x00, 0xFF, 0x00, false); break;
	      case _LAYER3:
	        rgb_matrix_layer_helper(0x00, 0x00, 0xFF, false); break;
	      case _LAYER4:
	        rgb_matrix_layer_helper(0xFF, 0xFF, 0x00, false); break;
	    							  }
	                        }
	  if ( this_led & (1<<USB_LED_CAPS_LOCK)) {
	        rgb_matrix_set_color(41, 0xFF, 0xFF, 0xFF);
	  }

}

void matrix_init_user(void) {
  //user initialization
}

void matrix_scan_user(void) {
  //user matrix
}

	bool process_record_user(uint16_t keycode, keyrecord_t *record) {
	  return true;
	}