AVR Freaks

void timer_init()

   {
   
           TIMSK |= (1 << OCIE1A); //enable channel 1A interrupt
            sei(); //enable global interrupts
            TCCR1B |= (1 << CS10) | ( 1 << CS11); //start timer at Fcpu/64
            TCCR1B |= (1 << WGM12);//set up for CTC mode
             OCR1A = 65000; //Value that the micro will compare with current count
   
   }
ISR(TIMER1_COMPA_vect)

   { 
      
      // would like to autoreload OCR1A with 65000 here
   }