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osDelay returns too early

KAgga.1
Associate III

‎2024-02-06 01:06 AM - last edited on ‎2024-02-06 01:50 AM by

Hello There,

I'm working on an app utilizing STM32H7A3 with CMSIS-OS2.
I'm facing a problem with osDelay(). Most of the time it returns too early than the actual delay. While HAL_Delay() always works fine.

I have debugged osDelay(3500) with oscilloscope. It's giving a delay of 141ms.
The before and after ticks were also 5537 and 5678 respectively.
Freertos tick rate is 1000Hz.

I have also tried setting the delay between 500 and 3500. But the actual one comes out to be 100-200ms.
Any help is appreciated.

Regards,

Keshav Aggarwal

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13 REPLIES 13
KAgga.1
Associate III

‎2024-02-13 05:20 AM

Can anyone help me on this?

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Pavel A.
Evangelist III

‎2024-02-13 10:52 AM

What is your MCU core clock source and rate? Have you used CubeMX/IDE to generate clock setup code?

 

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KAgga.1
Associate III
In response to Pavel A.

‎2024-02-13 09:19 PM

Yes I used CubeIDE. Below is the clock configuration.

KAgga1_1-1707888310116.png

 

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KAgga.1
Associate III
In response to KAgga.1

‎2024-02-13 09:23 PM - edited ‎2024-02-13 09:24 PM

@Pavel A. I think the issue is with the Freertos/CMSIS_OS2 as osThreadSuspend/osThreadResume is conflicting with osDelay.
I also checked the stacks. They were fine.

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