new LED logic: constant WARNING if VBATT is below 7v

firmware/controllers/sensors/voltage.h

@@ -10,10 +10,13 @@
 #pragma once
 
 #include "global.h"
-#include "engine_configuration.h"
-
 #define LOW_VBATT 7
 
+#ifdef __cplusplus
+#include "engine_configuration.h"
+
 float getVRef(DECLARE_ENGINE_PARAMETER_SIGNATURE);
 float getVBatt(DECLARE_ENGINE_PARAMETER_SIGNATURE);
 bool hasVBatt(DECLARE_ENGINE_PARAMETER_SIGNATURE);
+
+#endif /* __cplusplus */

firmware/hw_layer/drivers/gpio/tle8888.c

@@ -40,6 +40,7 @@
 #include "gpio/gpio_ext.h"
 #include "pin_repository.h"
 #include "os_util.h"
+#include "voltage.h"
 
 EXTERN_ENGINE_CONFIGURATION;