_task_create showing unpredictable behavior

kishu306 · ‎06-26-2018

Hello,

I am using MK61 ( 1 MB flash) micro-controller for my application.

I am creating a Main Task , which creates other application tasks.

There are 8 tasks created other than my Main task.

When the 8th (final task) is created, the Main task is getting killed.

This was confirmed by calling the OS Call "task_get_id_from_name()" from one of the running tasks. It shows '0'.

Can you give some suggestions to see what exactly may be the problem.

danielchen · ‎06-27-2018

HI kishore

Just as Mark said, I would suggest you check the stack size.

MQX can support more than 8 tasks. could you attach your code here, so I can reproduce your issue on my side?

Or you can submit a ticket , attached your project to NXP technical support.

https://community.nxp.com/docs/DOC-329745

Regards

Daniel

mjbcswitzerland · ‎06-26-2018

Hi

Check task stack sizes to be adequate since this is a critical issue with such operating systems (they can corrupt each other if one is too small).

Regards

Mark

kishu306 · ‎06-26-2018

Hello Mark,

Thanks for the reply.

I have increased the stack size to 5 times but no effect.

I am listing few scenarios which i tested. This may help you to understand the issue more.

1. Only the 8th task ( Task 'X') gives such problem.

2. The issue still remains even after the order of task creation is rearranged.

3. The Task id for Task 'X' is displayed and its non-zero.

4. The task template structure is in properly created as mentioned in MQX User guide.

5. The issue was seen even after the Task 'X' is only created. ( No other tasks are created)

Regards,

Kishore.

mjbcswitzerland · ‎06-27-2018

Hi Kishore

I don't use MQX (and NXP no longer supports it) so you may need to contact the manufacturer for such problems.

Regards

Mark

uTasker developer and supporter (+5'000 hours experience on +60 Kinetis derivatives in +80 product developments)
Kinetis: http://www.utasker.com/kinetis.html (including FreeRTOS integration and support)

kishu306 · ‎06-27-2018

Hello Mark,

I see at the NXP Webpage with a column on MQX Support. Pasting the pic for your reference.

Please confirm .