#include <ioavr.h>
#include <intrinsics.h>


#pragma vector=WDT_vect
__interrupt void interrupt_WDT(void)
{
  __disable_interrupt();
  __watchdog_reset();
  WDTCR |= (1<<WDCE) | (1<<WDE);
  WDTCR = (1<<WDIE)|(1<<WDP2)|(1<<WDP0);
  PORTB^=0xFF;
  __enable_interrupt();
}

void main()
{
  __disable_interrupt();
  __watchdog_reset();
  WDTCR |= (1<<WDCE) | (1<<WDE);
  WDTCR = (1<<WDIE)| (1<<WDP2)|(1<<WDP0);  
  DDRB=0xFF;
  PORTB=0x00;
  __enable_interrupt();
  while(1)
  {
    __no_operation();
  }
}