RTOS: Watch dog working in RTOS

Vijay

Tool/software: TI-RTOS

Hello,

I am working on watchdog module in a microcontroller.

As per my understanding, If we didn't feed the watchdog timer, timer becomes zero and it resets the microcontroller.

up to now, if I work on a single task, it is working fine when I am not servicing timer, the timer starts decrements zero and resets microcontroller and when I am servicing it is not resting the microcontroller.

when I manually(software) hang the code, CPU reset happening.

Now In my project, we have total 19 tasks running, even one task (like video freezing) is getting stuck or hang, CPU reset is not happening.

my doubt is watchdog timer will reset the only processor is hanging or will it reset even one task also got hang..???

if watchdog timer will reset the processor the only processor is suspended, then is there any method to solve if task got suspend then we can make the system to reset.

watchdog timer will reset the only processor is hanging

over 9 years ago

0 ToddMullanix over 9 years ago

TI__Guru* 96960 points

What device are you using? What software (and versions) are you using?

Todd

0 Vijay over 9 years ago in reply to ToddMullanix

Intellectual 710 points

Thank you for reply.

ToddMullanix said:
What device are you using?

I am using TI-MSP432.

ToddMullanix said:
What software (and versions) are you using?

I am using IAR Embedded Workbench.

Please response ASAP.

Thanks you.

0 Chris Sterzik over 9 years ago in reply to Vijay

TI__Guru 73781 points

Is there a specific example that you are working from or could you perhaps provide a section of your code so we can try to recreate the issue?

Chris

0 Vijay over 9 years ago in reply to Chris Sterzik

Intellectual 710 points

Chris Sterzik said:
could you perhaps provide a section of your code so we can try to recreate the issue

Very sorry, i could not able to share the code.

I am expecting some general suggestions for this kind of issue.

0 Christoph Schweers over 9 years ago in reply to Vijay

Intellectual 475 points

Hi K VIJAYA RAM BHARADVAJ,

if you are using more than one task, I suppose your are using some kind of RTOS. It is the duty of the RTOS to provide a proper way to detect and handle faulty tasks. This is beyond the responsibility of a hardware watchdog.

Best regards
Christoph

0 Vijay over 9 years ago in reply to Christoph Schweers

Intellectual 710 points

Hi Christoph Schweers,

Thank you for clarification.

First of all sorry for late response.

We have solved this problem in a different way. We are maintaining a fault counter buffer. In this buffer, we are checking for greater than a constant value.

Once fault counter exceeds the constant value, we are not servicing watchdog timer.

In this way, we are able to find out the fault task and system getting rested.

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RTOS: Watch dog working in RTOS