- TCCR1C = _BV(COM1D0) | _BV(COM1D1) | _BV(PWM1D);
- TCCR1A = _BV(COM1A0) | _BV(COM1A1) | _BV(COM1B0) | _BV(COM1B1) | _BV(PWM1A) | _BV(PWM1B);
- TCCR1B = _BV(7) // PWM1X: PWM inversion mode
- | _BV(CS10) // no clock prescaling
- ;
- TC1H = 0x01;
- OCR1C = 0xFF; // TOP value
+ // PWM channel D is inverted, ...
+ TCCR1C = _BV(COM1D1) | _BV(COM1D0) | _BV(PWM1D);
+ // PWM channels A and B are not
+ TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(PWM1A) | _BV(PWM1B);
+ TCCR1D = 0;
+ TCCR1B = _BV(CS10); // no clock prescaling
+
+ TC1H = PWM_MAX >> 8;
+ OCR1C = PWM_MAX & 0xFF; // TOP value
+
+ TC1H = PWM_MAX >> 8; // PWM3 is inverted
+ OCR1D = PWM_MAX & 0xFF;