#include <avr/io.h>
#include <util/delay.h>
#include <inttypes.h>
 
#define LED_AN(LED)	(PORTD |=  (1<<(LED)))
#define LED_AUS(LED)	(PORTD &= ~(1<<(LED)))
#define LED_TOGGLE(LED)	(PORTD ^=  (1<<(LED)))

#define LED1	PD0
#define LED2	PD1


// tester 1 

#define TASTER1	PD2
#define TASTER1_GEDRUECKT()	(PIND & (1<<TASTER1))
#define TASTE1_AUF 0
#define TASTE1_ZU  1

// taster 2

#define TASTER2	PD3
#define TASTER2_GEDRUECKT()	(PIND & (1<<TASTER2))
#define TASTE2_AUF 0
#define TASTE2_ZU  1
 

int main(void)
{
  uint8_t alter_tastenzustand1 = TASTE1_AUF;
  uint8_t alter_tastenzustand2 = TASTE2_AUF;
  DDRD &= ~(1<<TASTER1) | (1<<TASTER2);
  DDRD |= (1<<LED1) | (1<<LED2);
  
  
  while(1)
  {

	if (TASTER1_GEDRUECKT() && (alter_tastenzustand1 == TASTE1_AUF))
   	 {
   		LED_TOGGLE(LED1);
	
		alter_tastenzustand1 = TASTE1_ZU;
   	 }
	
	if (!TASTER1_GEDRUECKT())
      alter_tastenzustand1 = TASTE1_AUF;
	}

// led 2

	if (TASTER2_GEDRUECKT() && (alter_tastenzustand2 == TASTE2_AUF))
   	 {
   	
	 
		LED_TOGGLE(LED2);

		alter_tastenzustand2 = TASTE2_ZU;
   	 }
	
	if (!TASTER2_GEDRUECKT())
      alter_tastenzustand2 = TASTE2_AUF;
	



}