variable pwm with a push button

zak · Joined: 09 Feb 2004 Posts: 2 Location: trinidad caribbean

hi i want to write a c code to set up a pwm output with a resolution of at least 8 bits. i want to be able to vary the pwm duty cycle with a push button, one button to increment the pwm duty and the other to decrement it. i also want to be able to save the last values when the system powers down. what i am realy trying to do is low pass filter the pwm to generate a variable dc voltage to be used as a reference voltage. can anyone help me. thank you in advance.

SteveS · Joined: 27 Oct 2003 Posts: 126

I think you will find the compiler has example code to do each of the parts of your project. There is also a lot of info on this site about PWM. Do some searching.

I would do each part independently first and then look at putting it all together. What you are attempting to do should work so start experimenting!

- SteveS