ISR(TIMER0_OVF_vect)    {
    counter0_ovf += 0xff;
}

ISR(TIMER1_CAPT_vect)   {
    if(!((measureFlag >> MEASURE_INPROCESS) & 1) && !((measureFlag >> MEASURE_DONE) & 1))   {
        cli();

        TC0_START;
        TC1_START;

        measureFlag |= 1 << MEASURE_INPROCESS;

        sei();

        _delay_ms(1000);
    }
    else if(!((measureFlag >> MEASURE_DONE) & 1))   {
        cli();

        TC0_STOP;
        TC1_STOP;

        lenghtOfMeasurement = timer1_ovf + TCNT1;
        numberOfImpulses = counter0_ovf + TCNT0;

        timer1_ovf = counter0_ovf = 0;

        measureFlag |= 1 << MEASURE_DONE;
        measureFlag &= ~(1 << MEASURE_INPROCESS);

        sei();
    }
}

ISR(TIMER1_OVF_vect){
    timer1_ovf += 0xffff;
}

ISR(TIMER2_COMPA_vect){
    if((measureFlag >> MEASURE_DONE) & 1)   {
        char buffer[5];
        lcd_clrscr();
        lcd_home();

        itoa(numberOfImpulses, buffer, 10);
        lcd_puts(buffer);

        itoa(lenghtOfMeasurement, buffer, 10);
        lcd_goto(0,1);
        lcd_puts(buffer);

        measureFlag &= ~(1 << MEASURE_DONE);
    }
}