#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdint.h>
#include <util/delay.h>


void long_delay_ms( int ms )
{  
  int wait=0;
  for(wait=0;wait<ms;wait++)
  {_delay_ms(1);} 
} 


void long_delay(uint16_t ms)
{
 for(;ms>0;ms--)
 {_delay_ms(1);}
}




int main()
{
  

  DDRB = (1 << DDB0) | (1 << DDB1) | (1 << DDB2) | 
         (1 << DDB3) | (1 << DDB4) | (1 << DDB5);  //0-5 auf ausgang
 
  long_delay_ms(800);
  
  PORTB = (1 << PB0); //pin0 einschalten also auf 5volt
  long_delay_ms(800);
  
  PORTB=PORTB & ~(1 << PB0); //bit löschen,pin0 aus->auf masse 
  long_delay_ms(800);                   

    
  DDRC = (1 << DDC0) | (1 << DDC1) | (1 << DDC2) | 
         (1 << DDC3) | (1 << DDC4) | (1 << DDC5) ; //0-5 auf ausgang

  
  DDRD = ~( (1 << DDD0) | (1 << DDD1) | (1 << DDD2) | 
            (1 << DDD3) | (1 << DDD4) ); //0-4 auf eingang

  
  PORTC = PORTC  & ~( (1<<PC0) | (1<<PC1) | 
                      (1<<PC2) | (1<<PC3) | 
					  (1<<PC4) | (1<<PC5) ); //0-5 auf low

  PORTB = PORTB  & ~( (1<<PB1) | 
                      (1<<PB2) | (1<<PB3) | 
					  (1<<PB4) | (1<<PB5) ); //1-5 auf low
  
  long_delay_ms(1000);     



//Losgehts:
     

  uint16_t frq=30;


for(;;){


while( (PIND & (1 << PD0))  )//solange wie pin an 5v
{
  PORTB = (1 << PB0); //pin0 einschalten also auf 5volt
  long_delay(frq);  
  
  PORTB=PORTB & ~(1 << PB0); //bit löschen,pin0 aus->auf masse 
  long_delay(frq);  
}
long_delay_ms(20);  


while( (PIND & (1 << PD1))  )//solange wie pin an 5v
{
 frq=(frq+1);
 long_delay_ms(30);
}
long_delay_ms(20);   


while( (PIND & (1 << PD3))  )//solange wie pin an 5v
{
 if(frq>2) 
 {frq=(frq-1);}
 else {}
 long_delay_ms(30);
}
long_delay_ms(20);   



}//ende for-schl.



}