re3

#include<avr/io.h>
#include "util/delay.h"
int main(void)
{
      unsigned int i=0
      PORTB = 0x00;
      DDRB |= (1<<PB1);
      PORTD |= (1<<PD1)|(1<<PD0);
      DDRD = 0x00;
  TCCR1A |=(1<<COM1A1)|(0<<COM1A0)|(1<<WGM11)|(0<<WGM10);
  TCCR1B |=(1<<WGM13)|(1<<WGM12)|(0<<CS12)|(0<<CS11)|(1<<CS10);
      TCNT1 = 0x00;
      ICR1 = 0xFF;
      OCR1A = 0x00;
  while(1)
  {
    if ((PIND&(1<<PD0))==0)
  {
  if (1<254)
  {
  i=i+1;
  OCR1A = i;
  _delay_ms(30);
  }
  }
  if ((PIND&(1<<PD1))==0)
  {
  if (i>0)
  {
  i--;
  OCR1A = i;
  _delay_ms(30);
  }
  }
  }
}