Add VIA support for QMK backlight, QMK RGBLight (#7911)

* Add VIA support for QMK backlight, QMK RGBLight

* clang-format changes

2 files changed, 80 insertions, 0 deletions

diff --git a/keyboards/cannonkeys/stm32f072/keyboard.c b/keyboards/cannonkeys/stm32f072/keyboard.c
index bf35a76c18..fdda018fc4 100644
--- a/keyboards/cannonkeys/stm32f072/keyboard.c
+++ b/keyboards/cannonkeys/stm32f072/keyboard.c
@@ -126,8 +126,86 @@ bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
   return process_record_user(keycode, record);;
 }
 
+#ifdef VIA_ENABLE
 
+void backlight_get_value( uint8_t *data )
+{
+	uint8_t *value_id = &(data[0]);
+	uint8_t *value_data = &(data[1]);
+  switch (*value_id)
+  {
+    case id_qmk_backlight_brightness:
+    {
+      // level / BACKLIGHT_LEVELS * 255
+      value_data[0] = ((uint16_t)kb_backlight_config.level) * 255 / BACKLIGHT_LEVELS;
+      break;
+    }
+    case id_qmk_backlight_effect:
+    {
+      value_data[0] = kb_backlight_config.breathing ? 1 : 0;
+      break;
+    }
+  }
+}
 
+void backlight_set_value( uint8_t *data )
+{
+	uint8_t *value_id = &(data[0]);
+	uint8_t *value_data = &(data[1]);
+  switch (*value_id)
+  {
+    case id_qmk_backlight_brightness:
+    {
+      // level / 255 * BACKLIGHT_LEVELS
+      kb_backlight_config.level = ((uint16_t)value_data[0]) * BACKLIGHT_LEVELS / 255;
+      backlight_set(kb_backlight_config.level);
+      break;
+    }
+    case id_qmk_backlight_effect:
+    {
+      if ( value_data[0] == 0 ) {
+        kb_backlight_config.breathing = false;
+        breathing_disable();
+      } else {
+        kb_backlight_config.breathing = true;
+        breathing_enable();
+      }
+      break;
+    }
+  }
+}
+
+void raw_hid_receive_kb( uint8_t *data, uint8_t length )
+{
+  uint8_t *command_id = &(data[0]);
+  uint8_t *command_data = &(data[1]);
+  switch ( *command_id )
+  {
+    case id_lighting_set_value:
+    {
+      backlight_set_value(command_data);
+      break;
+    }
+    case id_lighting_get_value:
+    {
+      backlight_get_value(command_data);
+      break;
+    }
+    case id_lighting_save:
+    {
+      backlight_config_save();
+      break;
+    }
+    default:
+    {
+      // Unhandled message.
+      *command_id = id_unhandled;
+      break;
+    }
+  }
+  // DO NOT call raw_hid_send(data,length) here, let caller do this
+}
+#endif
 
 //
 // In the case of VIA being disabled, we still need to check if
diff --git a/keyboards/cannonkeys/stm32f072/led_custom.h b/keyboards/cannonkeys/stm32f072/led_custom.h
index 28e0f02ed3..550d5b84cc 100644
--- a/keyboards/cannonkeys/stm32f072/led_custom.h
+++ b/keyboards/cannonkeys/stm32f072/led_custom.h
@@ -4,3 +4,5 @@ void backlight_task(void);
 void breathing_interrupt_disable(void);
 void breathing_interrupt_enable(void);
 void breathing_toggle(void);
+void breathing_enable(void);
+void breathing_disable(void);