Add overlay framework

common/keymap.h

@@ -23,16 +23,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "action.h"
 
 
-/* translates key_t to keycode */
+#ifdef USE_KEYMAP_V2
+/* translates key to keycode
+ *      layer:  0-15 for base layers
+ *              16-31 for overlays
+ */
 uint8_t keymap_key_to_keycode(uint8_t layer, key_t key);
-/* translates keycode to action */
-action_t keymap_keycode_to_action(uint8_t keycode);
 /* translates Fn keycode to action */
 action_t keymap_fn_to_action(uint8_t keycode);
-
-
-
-#ifndef NO_LEGACY_KEYMAP_SUPPORT
+#else
+#warning "You are using LEGACY KEYAMP. Consider using NEW KEYMAP."
+/* 
+ * legacy keymap support
+ */
 /* keycode of key */
 uint8_t keymap_get_keycode(uint8_t layer, uint8_t row, uint8_t col);
 /* layer to move during press Fn key */