Pulse Wide Modulation (PWM) operates like a switch that constantly cycles on and off. It is a hardware feature used to control servomotors, for voltage regulation and so on. The most well-known applications of PWM are:
- Motor speed control
- Light dimming
- Voltage regulation
Now, let's introduce PWM with a simple diagram:
The preceding figure describes a complete PWM cycle, introducing some terms we need to clarify prior to getting deeper into the kernel PWM framework:
- Ton: This is the duration during which the signal is high.
- Toff: This is the duration during which the signal is low.
- Period: This is the duration of a complete PWM cycle. It represents the sum of Ton and Toff of the PWM signal.
- Duty cycle: It is represented as a percentage of the time signal that remains on during the period of the PWM signal.
Different formulas are detailed as follows:
- PWM period...
