Implement core communication

keyboards/planck/keymaps/oryx/keymap.c

@@ -129,6 +129,6 @@ bool music_mask_user(uint16_t keycode) {
         return true;
     }
 }
-uint32_t layer_state_set_user(uint32_t state) {
+layer_state_t layer_state_set_user(layer_state_t state) {
     return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
 }