This probably seems very simple to you but I'm having trouble understanding this TIMER 2 section on an example code I've been given - it makes no sense at all to me!
//TIMER 2//
//TCCR2A COM2A1+COM2B1 = clear OCOA and 0C0B on match set OCOA and 0C0B at BOTTOM, WGM2 bit 0 and 1 = mode 3 fast PWM
TCCR2A = _BV(COM2A1) | _BV(COM2B1)| _BV(WGM21) | _BV(WGM20);
TCCR2B = _BV(CS22); // Bit Value; Timer Counter Control Register
It's for a line following robot - I've configured the pins for input and output and stuff, and understand the calibration etc., just don't get this bit!
If you're going to play with arduino for very long you'll need this document. Section 18 is the one on timer 2. The description of the registers starts on page 153 but I would try to read the entire section. It is kind of a dry read, it might take 2 or 3 times through to really get it. BUt spend a day with this and you'll be a master of the timers on an arduino.
