Nucleo-H7S3L8 + FreeRTOS osDelay as well as osTimerStart not working

[htxy]

Hi everyone,

I'm working on an STM32H7RS project (NUCLEO-H7S3L8) with the following setup:

• Bootloader in internal flash (0x08000000)

• Application in external OSPI flash (XIP) at 0x70000000

• Using FreeRTOS

• Using TIM6 as the HAL time base (not SysTick)

• Configured using latest STM32CubeMX and STM32CubeIDE (v1.18.1)

My current issue is that while HAL_Delay and TIM6 is working, SysTick seems not to work inside of the RTOS as soon as the scheduler starts.

I noticed that because ther CPU got caught inside osDelay without throwing an error. 

I also already checked the NVIC, but it seems pretty fine to me. Did i otherwise miss something what i configured wrong inside my IOC file?

[Saket_Om]

Hello @htxy 

Is the systick interrupt happen? 

[htxy]

Yes, when in debugging, i inspected the SFRs. After every step the value of STCVR changes, which would indicate for me that SysTick is behaiving normal and the interrupt happens.

But i dont know if that still is the case when the Scheduler starts, as CubeIDE doesnt allow you to live debug the RTOS app.

[Saket_Om]

Hello @htxy

Could you please check if the SysTick_Handler() is being called by setting a breakpoint when Scheduler starts ?

[htxy · Accepted solution]

It seems to be that SysTick_Handler() is not beeing called by the FreeRTOS.Is that a problem with the NVIC?

EDIT: This is the solution, to set all the interrupts which are not 0 or 15 to something above 5 in my case, it may vary depending on your FreeRTOS configuration.