FreeRTOS always show stack over usage

[kensu]

Hi,

I am debugging with my application with FreeRTOS on LPC1830,

At first, I find my application have different running result with enable debug message out and disable.

When I enable my debug message, the result is correct.

In my experience, my application may has something wrong.

I find one of my task always show the stack usage is too much,

I don't know why, no mater how I increase the stack size, and I remove all variable and function call in this task,

It still happens?

Is any possible reason to cause this condition?

Thanks

Ken

[BlackNight]

Hi Ken,

can you share the code how you crate the MainControl task? Of interest is how much of stack you actually are requesting for the task.

Otherwise it could be that a dangling pointer changes/corrupts your TCB (Task Control Block), causing the task list to report a wrong stack size?

I assume you have enabled the stack overflow hook and the FreeRTOS asserts too?

I hope this helps,

Erich

[kensu]

Hi

Thanks for fast reply,

After I remove any variable and API, actually, the task is almost empty.

But it also happen the stack size usage is over. So I think the cause is not the task itself.

I am not sure where to enabled stack overflow hook and FreeRTOS asserts.

I will confirm it soon.

B.R.

Ken

[BlackNight]

Hi Ken,

I was interested in how you create that task with xTaskCreate().

And why are you not using

vTaskDelay(pdMS_TO_TICKS(1000));

in your task instead of that utilTaskSleepMilliSec()?

I hope this helps,

Erich

[kensu]

Hi Erich,

 I create the task with the API,

xTaskCreate(taskSystemMainControl, "MainControl", TASK_SYSTEM_MAIN_CONTROL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL), (TaskHandle_t *) NULL);

And My utilTaskSleepMilliSec() is called vTaskDelay API,

I verify the application on LPC1857 evaluation broad , I also check again the stack usage in LPC1857, it's no problem.

But when I transfer the code to LPC1830, these problem happens.

Hard to know why.

Thanks

Ken

[BlackNight]

Hi Ken,

what is the content of TASK_SYSTEM_MAIN_CONTROL_STACK_SIZE ?

Erich

[kensu]

Hi,

I don't enable hook function.

Ken