-1

I've got this code from the MultiWii project, which is relevant to the hardware, ATmega32u4, I have. It is part of a function called initOutput().

In the comment it says "connect pin 6", which is the bit of that which specifies pin 6 as I would like to change it to another pin, specifically A0.

// Enhanced PWM mode
TCCR4E |= (1<<ENHC4);

// Prescaler to 16
TCCR4B &= ~(1<<CS41);
TCCR4B |= (1<<CS42) | (1<<CS40);

// Phase and frequency correct mode and top to 1023, but
// with enhanced PWM mode we have 2047.
TCCR4D |= (1<<WGM40);
TC4H = 0x3;
OCR4C = 0xFF;

// Connect pin 6 to timer 4 channel D
TCCR4C |= (1<<COM4D1) | (1<<PWM4D);
1

It's the (1<<COM4D1) that enables pin 6, or more specifically OC4D for timer output. You cannot use A0 instead, since there is no output compare capability on that pin; only pins 13, 5, 10, 9, 6, and 12 can be connected to timer 4. See the datasheet for details.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.