Architecture cleanup

Core/Inc/clock.h

@@ -9,7 +9,15 @@
 #define INC_CLOCK_H_
 
 #include <stdint-gcc.h>
+#include "ds1307.h"
 
+// functions from lower layer
+void clock_InitModule(void);
+void clock_update(ds1307_dev_t *ds1307_dev);
+
+
+
+// functions from service layer
 uint8_t clock_convert_hours(uint8_t hours);
 uint8_t clock_convert_min_sec(uint8_t min_sec);