osDelay returns too early

[KAgga.1]

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

[KAgga.1]

Can anyone help me on this?

[Pavel A.]

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

[KAgga.1]

Yes I used CubeIDE. Below is the clock configuration.

[KAgga.1]

@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.