Hallo SprintSB,

ich habe jetzt einige Sachen verändert, ausgebessert, etc., aber rc5.code ist immer 0. Hat noch jemand eine Idee, was ich da falsch mache?

Code:
#include <avr/io.h>
#include <avr/interrupt.h>
#include <math.h>



struct rc5_parts
 {
    volatile char s_bit;
	volatile uint8_t addresse;
	volatile uint8_t code;
	volatile char rdy;
 } rc5;

char mid;
volatile uint8_t bitnummer = 0;

void init_rc5()
{
 MCUCR |= (1<<ISC11) | (1<<ISC10);
 GICR |= (1<<INT1);
 TCCR0 |= (1<<CS02);
}

//****************************************************USART******************************

void init_usart(void) 
{ 
 UBRRL |= 0b01100111; 
 UCSRB = (1<<TXEN) | (1<<RXEN); 
 UCSRC = (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0); 
} 

void send_char(unsigned char s) 
{ 
 while (!(UCSRA & (1<<UDRE))); 
 UDR = s; 
} 

void send_string(char *s) 
{ 
 while(*s != '\0') 
  { 
   send_char(*s); 
   s++; 
  } 
} 

//**********************************************************USART-ENDE********************

SIGNAL(SIG_OVERFLOW0)
{
 bitnummer++;
 TCNT0 = 145;      //Timer soll nach 1.778ms Overflow haben
	
 if(bitnummer == 12)      
  {
   TIMSK &= ~(1<<TOIE0);
   rc5.rdy = 1;
   rc5.s_bit = 0;
   bitnummer = 13;
  }
 
 if(bitnummer<6)             //Wenn i<6, werden die ausgelesenen Bits zu Addresse hinzugefügr
	{
	  if((PORTD & (1<<3)) == 1)
	   {
	    rc5.addresse |= (1<<(bitnummer-1));
	   }
	  else
	   {
	    rc5.addresse &= ~(1<<(bitnummer-1));
	   }
    }
	
 if((bitnummer>=6)&(bitnummer<=11))    //6 - 11 werden zu rc5.code hinzugefügt
	{
	  
	  if((PORTD & (1<<3)) == 1)
	   {
	    rc5.code = 0xff; //(1<<(bitnummer-6));
	   }
	  else
	   {
	    rc5.code = 0x00; //~(1<<(bitnummer-6));
		char hello[15] = "111";
        send_string(hello);
	   }
	}
}

SIGNAL(SIG_INTERRUPT1)
{

 
 if(rc5.s_bit<4)
  {
   rc5.s_bit++;
  }
 if(rc5.s_bit == 4)
  {    
   TIMSK |= (1<<TOIE0);  // Timer0 Interrupts enablen
   TCNT0 |= 228;         //Timer so vorladen, dass er zur Mitte des 2. Halbbits den ersten Timeroverflow hat      
 
   GICR &= ~(1<<INT1);  //Int1 disablen
  }
}
   
int main(void)
{
 init_usart();
 init_rc5();
 char i = 1;
 sei();
 char result[10];
 char hello[15] = "Hallo Martin";
 send_string(hello);
 for(;;)
  {
   if(rc5.rdy == 1)
    {
     itoa(rc5.code,result,10);
	 char hello2[15] = "RC5";
     send_string(hello2);
     send_string(result);
	 rc5.rdy = 0;
	 GICR |= (1<<INT1);
	}
  }
}