S32 Design StudioのトピックRe: FreeRTOS couldn't switch task

FreeRTOS couldn't switch task

asd046012 — Wed, 17 Nov 2021 11:32:03 GMT

Hello

I use the SDK 2.9 version, and MCU is S32K114.

After I config clock, pin, and FreeRTOS, compile,and run.

I find that system tick run into interrupt and counter, but OS could not switch to others task,just always run in idle task.

For the project code, please see the attachment.

Re: FreeRTOS couldn't switch task

asd046012 — Tue, 16 Nov 2021 02:29:56 GMT

I find that code could enter into system tick interrupt, but couldn't enter into xPortPendSVHandler. I still didn't find the reason.

Re: FreeRTOS couldn't switch task

jiri_kral — Tue, 16 Nov 2021 12:17:32 GMT

I looked briefly at your project - and for some reason any task (except the idle one) is not created properly. I didn't dig deeper, but you are creating tasks as a static ones - means you maintaining memory for task info is up to you - So main issue is, that other task than Idle is not known for scheduler.

Re: FreeRTOS couldn't switch task

asd046012 — Wed, 17 Nov 2021 02:03:05 GMT

Hello

The method of creating task as a static one has been used in others MCU(S32K118), and use same SDK version.

why could not create task in idle task?

Now the all task just have simple operation, so I think the stack is enough.

Is there a problem with the configuration of FreeRTOS?

Can you help to find out what is the reason?

Re: FreeRTOS couldn't switch task

asd046012 — Thu, 18 Nov 2021 01:38:47 GMT

Hello

This issue has been solved, the reason of causing this issue is SDK version bug.

First I configured the max number of priority as 32,FreeRTOS shall not switch task, but when I configured the max number of priority as 8, all task run normally.