#define F_CPU 1000000
 
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/delay.h>

#define debounce( port, pin )            \
({                  \
  static uint8_t flag = 0;  /* new variable on every macro usage */  \
  uint8_t i = 0;              \
                  \
  if( flag ){      /* check for key release: */    \
    for(;;){      /* loop ... */        \
      if( !(port & 1<<pin) ){  /* ... until key pressed or ... */  \
  i = 0;      /* 0 = bounce */      \
  break;                \
      }                  \
      _delay_us( 98 );    /* * 256 = 25ms */      \
      if( --i == 0 ){    /* ... until key >25ms released */  \
  flag = 0;    /* clear press flag */      \
  i = 0;      /* 0 = key release debounced */    \
  break;                \
      }                  \
    }                  \
  }else{      /* else check for key press: */    \
    for(;;){      /* loop ... */        \
      if( (port & 1<<pin) ){  /* ... until key released or ... */  \
  i = 0;      /* 0 = bounce */      \
  break;                \
      }                  \
      _delay_us( 98 );    /* * 256 = 25ms */      \
      if( --i == 0 ){    /* ... until key >25ms pressed */  \
  flag = 1;    /* set press flag */      \
  i = 1;      /* 1 = key press debounced */    \
  break;                \
      }                  \
    }                  \
  }                  \
  i;        /* return value of Macro */    \
}) 
// globale Variablen
 
uint8_t zaehlerLED5;
uint8_t zaehlerLED6;

 
int main() {
 
// IO konfigurieren
 
    DDRA &= ~ (1<<PA4) | (1<<PA5) ;
    DDRB = (1<<PB4) | (1<<PB5);
    
 
 
    while(1) {
        
		if (debounce(PINA, PA4)) 
			{		
				PORTB |= (1<<PB4);
				_delay_ms( 1000 );
			}
			
		
	    if ( zaehlerLED5 > 0 )
			{
    			  zaehlerLED5--;

			}
		
		if ( zaehlerLED5 == 0 )

			{
			 	PORTB &= ~(1<<PB4);
			}

		if (debounce(PINA, PA4)) 
			{		
				PORTB |= (1<<PB4);
				zaehlerLED5 = 0;
			}		
// LED2

		
		if (debounce(PINA, PA5)) 
			{		
				PORTB |= (1<<PB5);
				_delay_ms( 1000 );
			}
			
		
	    if ( zaehlerLED6 > 0 )
			{
    			  zaehlerLED6--;

			}
		
		if ( zaehlerLED6 == 0 )

			{
			 	PORTB &= ~(1<<PB5);
			}

		if (debounce(PINA, PA5)) 
			{		
				PORTB |= (1<<PB5);
				zaehlerLED6 = 0;
			}		




}
return 0;
}