Issue with HR Timer PWM Frequency on STM32

Safaa_Alzubaidi · ‎2024-04-24

Hello STM Community,

I'm encountering an issue with generating a PWM signal using the HR Timer (High-Resolution Timer) on an STM32 microcontroller. My goal is to generate a PWM signal with a frequency of 16 kHz, but I'm consistently getting a frequency of 83 kHz instead.

Here are the details of my configuration:

- I'm using the HR Timer (HT Timer) on an STM32 microcontroller.

- I've tried adjusting the prescaler ratio in the .ioc file to achieve the desired frequency. Initially, I set the prescaler ratio to 170 MHz x 4 to theoretically achieve a minimum frequency of 10.4 kHz. However, even with this setting, I'm still getting a frequency of 83 kHz.

-The HR Timer is crucial for my application, and I need to accurately generate a PWM signal with a frequency of 16 kHz.

Could anyone please provide insights into what might be causing this discrepancy and how I can achieve the desired PWM frequency of 16 kHz using the HR Timer on STM32?

Any help or suggestions would be greatly appreciated.

Thank you!

Semer CHERNI · ‎2024-05-06

Hello @Safaa_Alzubaidi

First let me thank you for posting.
Could you share the ioc file used for the configuration.

BR,
Semer.

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