Hands-On Robotics Programming with C++

The softPWM library

wiringPi consists of a softPWM library, using which we can get PWM signal output from any data pin of the RPi. The softPWM library contains two main functions: softPwmCreate and softPwmWrite. Both of these functions work as follows:

softPwmCreate(pin number, initial duty cycle value, max duty cycle value);

The softPwmCreate function is used to create a PWM pin. It consists of three main parameters:

• pin number: Pin number represents the wiringPi pin that we want to set as a PWM pin.
• initial duty cycle value: In initial duty cycle value we have to provide as the minimum value of the duty cycle. The initial duty cycle value is ideally set to 0.
• max duty cycle value: In the max duty cycle value, we have to provide the maximum ...