Hi$!$ I$\text{'}$m going to share a Proteus image. In this image, in the left bottom

R$5$ and R$3$ used for frequency. R$5$ is for decrease and R$3$ is for increase.

R$8$ and R$10$ used for duty cycle. R$8$ is for decrease and R$10$ is for increase.

This was for introduction in my set. Now I$\text{'}$m going to share you details about my project;

Write and run a PWM application that starts operating at a $50\%$ duty cycle and $2000$ Hz frequency when executed. It should be possible to increase or decrease the duty cycle by $5\%$ increments with two buttons, and to increase or decrease the PWM frequency by $16$ Hz increments with another two buttons. Use the RC$2$ pin as the output pin to observe through a buzzer and frequency meter.ject.