How to change PWM frequency without Duty changed

[alex_li]

We use PTB8/FTM3_CH0(pin 77) of FS32K142HRT0VLL as a PWM control signal.

Now we need adjust PWM frequency without duty changed when PWM running, how can we  do?

Thanks!

li min 

[danielmartynek]

Hi alex_li,

It was answered here:

Square wave output with variable frequency, FTM 

You need to update the duty cycle as well when the frequency is changed.

Regards,

Daniel