Implement raise/lower for default keymap.

* Properly allow includes for keymaps to allow defining
  custom keycodes, and then adding them to the
  keymap.overlay file.
* Fix keymap.c loading after build refactor.
* Fix for deactivating a layer working properly.
* Fix default keymap to put transparent in proper spots to
  make raise/lower keycodes work as expected.
* Add custom raise/lower keycode handling to default
  keymap.

CMakeLists.txt

@@ -9,9 +9,9 @@ include(cmake/keymap.cmake)
 find_package(Zephyr)
 project(zmk)
 
-if(EXISTS ${KEYMAP_DIR}/${KEYMAP}/keymap.c)
+if(EXISTS ${KEYMAP_DIR}/keymap.c)
 	message(STATUS "ADDING THE KEYMAP SOURCE")
-	target_sources(app PRIVATE ${KEYMAP_DIR}/${KEYMAP}/keymap.c)
+	target_sources(app PRIVATE ${KEYMAP_DIR}/keymap.c)
 endif()
 
 

boards/shields/petejohanson_handwire/keymaps/default/include/keymap.h

@@ -0,0 +1,5 @@
+
+#include <dt-bindings/zmk/keys.h>
+
+#define CC_RAIS ZC_CSTM(1)
+#define CC_LOWR ZC_CSTM(2)

boards/shields/petejohanson_handwire/keymaps/default/keymap.c

@@ -1,7 +1,34 @@
 
 #include <zmk/keys.h>
+#include <zmk/keymap.h>
+#include <keymap.h>
 
 bool zmk_handle_key_user(struct zmk_key_event *key_event)
 {
+	switch (key_event->key)
+	{
+	case CC_LOWR:
+		if (key_event->pressed)
+		{
+			zmk_keymap_layer_activate(1);
+		}
+		else
+		{
+			zmk_keymap_layer_deactivate(1);
+		}
+
+		return false;
+	case CC_RAIS:
+		if (key_event->pressed)
+		{
+			zmk_keymap_layer_activate(2);
+		}
+		else
+		{
+			zmk_keymap_layer_deactivate(2);
+		}
+		return false;
+	}
+
 	return true;
 };

boards/shields/petejohanson_handwire/keymaps/default/keymap.overlay

@@ -1,4 +1,5 @@
 #include <dt-bindings/zmk/keys.h>
+#include <keymap.h>
 
 / {
 	chosen {
@@ -14,22 +15,22 @@
 		compatible = "zmk,layers";
 
 		default: layer_0 {
-			label = "Default";
+			label = "DEFAULT";
 			keys =
 	<
 	KC_A KC_B
-	KC_C ZC_CSTM(1)
+	CC_RAIS CC_LOWR
 	>;
 		};
 
 		lower: layer_1 {
-			label = "Lower";
-			keys = <KC_D KC_C KC_B KC_A>;
+			label = "LOWER";
+			keys = <KC_D KC_C ZC_TRNS ZC_TRNS>;
 		};
 
 		raise: layer_2 {
-			label = "Raise";
-			keys = <KC_C KC_D KC_A KC_B>;
+			label = "RAISE";
+			keys = <KC_C KC_D ZC_TRNS ZC_TRNS>;
 		};
 	};
 };

cmake/keymap.cmake

@@ -76,13 +76,19 @@ foreach(root ${BOARD_ROOT})
 	endif()
 endforeach()
 
-find_path(KEYMAP_DIR
+find_path(BASE_KEYMAPS_DIR
 	NAMES ${KEYMAP}/keymap.overlay
 	PATHS ${KEYMAP_DIRS}
 	NO_DEFAULT_PATH
 )
 
-if (KEYMAP_DIR)
-	message(STATUS "Using keymap directory: ${KEYMAP_DIR}/${KEYMAP}/")
-	set(DTC_OVERLAY_FILE ${KEYMAP_DIR}/${KEYMAP}/keymap.overlay)
+if (BASE_KEYMAPS_DIR)
+	set(KEYMAP_DIR "${BASE_KEYMAPS_DIR}/${KEYMAP}" CACHE STRING "Selected keymap directory")
+	message(STATUS "Using keymap directory: ${KEYMAP_DIR}/")
+	# Used to let local imports of custom keycodes work as expected
+	list(APPEND DTS_ROOT ${KEYMAP_DIR})
+	if (EXISTS "${KEYMAP_DIR}/include")
+		include_directories("${KEYMAP_DIR}/include")
+	endif()
+	set(DTC_OVERLAY_FILE ${KEYMAP_DIR}/keymap.overlay)
 endif()

include/dt-bindings/zmk/keys.h

@@ -66,9 +66,7 @@
 #define KC_ALT 0x02
 #define KC_CTRL 0x03
 
-#define ZC_RAIS 0xF0
-#define ZC_LOWR 0xF1
-#define ZC_TRNS 0xF2
-#define ZC_NOOP 0xF3
+#define ZC_TRNS 0xF0
+#define ZC_NOOP 0xF1
 
 #define ZC_CSTM(n) (0xFF + n)

include/zmk/keymap.h

@@ -11,6 +11,16 @@
 #define ZMK_KEYMAP_NODE DT_CHOSEN(zmk_keymap)
 #define ZMK_KEYMAP_LAYERS_LEN DT_PROP_LEN(ZMK_KEYMAP_NODE, layers)
 
+#define _ZMK_LAYER_ENUM_ITEM(label) DT_CAT(label, _layer)
+
+#define _ZMK_KEYMAP_GENERATE_LAYER_CONST(node_id) \
+    _ZMK_LAYER_ENUM_ITEM(DT_NODELABEL(node_id)),
+
+enum zmk_keymap_layer
+{
+    DT_FOREACH_CHILD(DT_INST(0, zmk_layers), _ZMK_KEYMAP_GENERATE_LAYER_CONST)
+};
+
 bool zmk_keymap_layer_activate(u8_t layer);
 bool zmk_keymap_layer_deactivate(u8_t layer);
 

src/keymap.c

@@ -31,12 +31,12 @@ static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_CO
 #endif
 };
 
-#define SET_LAYER_STATE(layer, state)               \
-	if (layer >= 32)                                \
-	{                                               \
-		return false;                               \
-	}                                               \
-	WRITE_BIT(zmk_keymap_layer_state, layer, true); \
+#define SET_LAYER_STATE(layer, state)                \
+	if (layer >= 32)                                 \
+	{                                                \
+		return false;                                \
+	}                                                \
+	WRITE_BIT(zmk_keymap_layer_state, layer, state); \
 	return true;
 
 bool zmk_keymap_layer_activate(u8_t layer)