// configure for PWM mode 14 (see p.136 of datasheet)
TCCR1B |= ((1 << WGM13) | (1 << WGM12));
TCCR1A |= (1 << WGM11);
What's the value of WGM10?
// configure for non-inverting mode on both pins (see Table 15-2, p.135)
TCCR1A |= (1 << COM1A0); // toggle OC1A on compare match, OC1B disconnected
What's the value of COM1A1?
TCCR1A |= (1 << COM1B1); // clear OC1B on compare match, set OC1B at bottom (non-inverting mode)
What's the value of COM1B0?
TCCR1B |= (1 << CS10); // configure prescaler to divide-by-1 and start counting
What are the values of the other CS* bits?