PIC12F675 PWM Code and Proteus Simulation




This post provides the PWM code for PIC12F675 microcontroller using timer0. There are many uses for PWM signal, e-g you can control dc motor speed using PWM. Timer0 is initialized in the start of the main function and using timer0 interrupts, PWM is generated.

PIC12F675 PWM

This code is written in C language using MPLAB with HI-TECH C compiler. You can download this code from the ‘Downloads‘ section at the bottom of this page.

It is assumed that you know how to configure timer0 of PIC12F675 microcontroller. If you don’t then please read this page first, before proceeding with this article.

The result of simulating the code in Proteus is shown below.

Here PIC12F675 is running on 4MHz internal oscillator. A PWM wave of 1.8KHz frequency with 50% duty cycle is being generated as shown in the above figure. GP0 pin is being used as PWM_PIN, which you can easily change in the code. Also, you can change PWM duty cycle in the code at any time as well.

PIC12F675 PWM schematic

Code

The code used to initialize PWM is shown below.

Downloads

PWM code using PIC12F675 was compiled in MPLAB v8.85 with HI-TECH C v9.83 compiler and simulation was made in Proteus v7.10. To download code and Proteus simulation click here.

 

For more detail: PIC12F675 PWM Code and Proteus Simulation




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