valist in logMsg, test on platform

cube/User/Inc/logger.h

@@ -1,6 +1,8 @@
 #ifndef _LOGGER_H_
 #define _LOGGER_H_
 
+
+
 // initialize the logger, creates a ringbuffer
 void logInit();
 
@@ -9,7 +11,7 @@ void logFree();
 
 // log a message, make sure it is a null-terminated string
 // return value can be ignored, it is only used in test
-int logMsg(char *msg);
+int logMsg(const char *format, ...);
 
 // reads the ringbuffer and transfers data to output channel
 // call this from the idle-loop