8-bit Timer/Counter0 operation modes. Part2
Previously we have revealed only two Timer/Counter0 modes: Normal and CTC. So far, there are a couple more helpful working modes, Fast PWM and Phase Correct PWM. These modes are even more complicated compared to what we know. But let’s not get scared of this and go through these modes step by step. First of all, let’s remember the basics of what PWM is and then do some practical stuff. Short intro to PWM Pulse Width Modulation (PWM) is a widely used technique for digitally controlling analog circuits. When talking analog circuits – these include lamps, motors, power converters, and more. For instance, simple DC motor speed can be adjusted by varying a supply voltage. But imagine what circuitry would be to do this through the microcontroller. To make things simpler, a PWM method was introduced. This allows controlling analog circuits digitally without high cost and complexity. Simply speaking, PWM is a way of encoding analog signal levels. We know that microcontrollers are excellent at creating square waves. So the only thing has to be taken care of – switching…
