So vielleicht?
Code:
#include "RP6RobotBaseLib.h"
int main(void)
{
initRobotBase();
startStopwatch1();

 while (true)
 {
   if(getStopwatch1() > 1000)
   {
      while(1)
		{
			writeString_P("Stopuhr wird gelesen.");
      	mSleep(400);
      	writeString_P(".");
      	mSleep(400);
      	writeString_P(".");
      	mSleep(400);
      	writeString_P("\n");
      	writeInteger((uint16_t)getStopwatch1(), DEC);
      	writeChar('\n');
      	mSleep(1458);
		}
   }
 }
return 0;
}