ISR(USART_RX_vect)
{
    cli();
    while(!(UCSR0A&(1<<RXC0))){};
    // clear the USART interrupt
    received = UDR0;

    if(pinState == 0)
    {
        OCR2A = received;
        pinState = 1;
    }
    else if(pinState == 1)
    {
        OCR2B = received;
        pinState = 2;
    }
    else
    {
        OCR0A = received;
        pinState = 0;
    }
    sei();
}