AVR Freaks

volatile char CMD_STATE; 

int main(void){

  //INIT
  SSR_PORT_DDR |= SSR_bm;
  SSR_OFF();
  ///////////////////////////////////////////////////
  MCUCR &= ~(1<<ISC00);
  MCUCR |= (1<<ISC01); // falling edge gens. int.
  GIMSK |= (1<<INT0);  // enable INT0 Interrupt
  ///////////////////////////////////////////////////
  LED_PORT_DDR = 0;      
  LED_PORT_DDR |= (GREEN_LED_bm | RED_LED_bm);
  GREEN_LED_ON();
  RED_LED_ON();
  _delay_ms(250);
  GREEN_LED_OFF();
  RED_LED_OFF();
  ///////////////////////////////////////////////////
  TCCR1B |= ((1<<WGM12)|(1<<CS12)|(1<<CS10)); // CTC, clk/1024
  OCR1A = 39062;
  TCNT1 = 0;

  ///////////////////////////////////////////////////

  CMD_STATE = 0;
  sei();

  while(1){
    while(1){
    
	  GREEN_LED_ON();
      _delay_ms(150);
	  GREEN_LED_OFF();
      _delay_ms(1250);
	 

      if(CMD_STATE)
	    break;
	}

        SSR_ON(); //SWITCH ON SSR
	GREEN_LED_ON();	

	while(!(PINB&0x04)); // wait till button not pressed

	while(1){
	   
	   if(CMD_STATE == 0){
	      SSR_OFF();  //SWITCH OFF SSR
	      GREEN_LED_OFF();
		  
	      while(!(PINB&0x04)); // wait till button not pressed
 
 		  GIFR |= (1<<INTF0);
          GIMSK |= (1<<INT0);  // re-enable INT0 Interrupt
		  break;
	   
	   }

       if(!(PINB&0x04)){
	     
		 TCNT1=0;
		 TIFR1 |= (1<<OCF1A); // clear int flag
		 TIMSK1 |= (1<<OCIE1A);

		 while(!(PINB&0x04)){
	       if(CMD_STATE == 0){

			 break;
           }
		 } 
		 TIMSK1 &= ~(1<<OCIE1A);
       }

	  
	
	}
 
  
  }



return 0;
}

/***************************************************************/
//ISR

ISR(EXT_INT0_vect){


  GIMSK &= ~(1<<INT0); //disable interrupt
  CMD_STATE = 1;
  

return;
}


ISR(TIM1_COMPA_vect){

  
  TIMSK1 &= ~(1<<OCIE1A); // disable timer int
  CMD_STATE = 0;
  


return;
}