debug works in interrupt mode now, needs some refactoring, MBUSYield stops the whole system

cube/User/Inc/logger.h

@@ -3,8 +3,6 @@
 
 #include <main.h>
 
-// won't work so far
-// #define LOGGER_INTERRUPT
 
 typedef enum {
     LOG_HIGH,
@@ -29,14 +27,7 @@ int errMsg(const char *format, ...);
 
 int coloredMsg(const t_logColor color, const char *format, ...);
 
-// reads the ringbuffer and transfers data to output channel
-// call this from the idle-loop
-// return value can be ignored, it is only used in test
-int logExec();
-
-#ifdef LOGGER_INTERRUPT
-void mbusCommTxCpltCallback(UART_HandleTypeDef *huart);
-#endif
+void debugTxCpltCallback(UART_HandleTypeDef *huart);
 
 
 #endif // _LOGGER_H_