File content as of revision 0:8a6f8b1df4ea:

#include "mbed.h"


InterruptIn iiUp(p15);
//Timer timer1;
int los=0;

// global vars and objects
DigitalOut led2(LED2);
//DigitalOut ledAlle(LED1,LED2, LED3,LED4);
Serial pc(USBTX, USBRX); // tx, rx    ; is default !!! (9600, 8N1)
char recChar=0;
bool recFlag=false;
char recArr[20];
int index=0;

// functions
void flushSerialBuffer() 
{ 
    while (pc.readable()) 
    { 
        pc.getc(); 
    } 
}
    
void readData() 
{  
    
        //recArr[index] = recChar;
    if ( pc.readable())        //recChar == '\r') || (index>=19)
    {      
    recChar = pc.getc();     
        //recFlag = true;
        //recArr[index] = 0;
       // float t = timer1.read_ms();
    pc.printf(" - That's the input: \n",recArr); 
        //if(index<5)
        //{
        //   pc.printf("Eingabe zu kurz ");  
        //}
        //if(index>10)
        //{
         //  pc.printf("Eingabe zu lang ");  
        //}
        //index = 0; 
      flushSerialBuffer();
        //los=0;
        }
        
        else
        {
            return;
        }
 
}
 
 void SendText()
 {
    
   pc.printf("Folgende Befehle werden ausgefuehrt:"); 
   pc.printf("r oder R = alle LEDs aus\n"); 
   pc.printf("s oder S = alle LEDs ein\n"); 
   pc.printf("s,Lx = LED x ein (X=1...4\n");
   pc.printf("r,Lx = LED x aus (X=1...4\n");
   pc.printf("I=alle LEDs invertieren (leuchtende LEDs aus, dunkle LEDs ein)\n");
   //timer1.start(); 
   los=1;   
    
 }
    
int main() {           
//    pc.baud(115200);
    pc.baud(38400);
    pc.format(8, SerialBase::Odd, 2);
    led2 = 1;

    flushSerialBuffer();
    pc.printf("Matthias Planinsec Gruppe B\r\n");
    
    
    pc.attach(&readData);
    SendText();
    
    //iiUp.rise(&SendText);
    
    while(1) {
        if (recFlag) {
            flushSerialBuffer();
//            pc.printf(" - That's the input: %s\r\n", recArr);  // non reantrant function
            recFlag = false;
            led2 = !led2;
        }
    }
}