topic Re: _task_restart not working in MQX Software Solutions

_task_restart not working

hetul — Fri, 31 Jul 2015 15:48:43 GMT

Hello,

I am trying to use _task_restart function but when called it hangs the application and I can see in task stack that the task I was trying to restart is in "terminating" state.

For test I modified web_hvac_mqx_twrk64f120m demo and I added following code at line 346 in Main_task().

#if 1 //for task_restart test

_task_id tempTid;

tempTid = _task_create(0, ALIVE_TASK, 0);

if(tempTid != MQX_NULL_TASK_ID)

{

PRINTF("%s tid:%d\n", __FUNCTION__, tempTid);

tempTid = _task_restart(tempTid, NULL, 0);

if(tempTid == MQX_OK)

PRINTF("Task restarted!\n");

else

PRINTF("Task restart error\n");

}

else

PRINTF("Could not create the task!\n");

#endif

The mqx config files are with default configuration that it comes with. Main_task hangs at _task_restart call and I tried to debug it and i can see it's getting hung in _task_restart_func() at line 2441 where it calls _sched_execute_scheduler_internal().

Did I not enable a particular MQX module and this is why i'm getting this problem? I appreciate any help.

Re: _task_restart not working

DavidS — Fri, 31 Jul 2015 16:09:05 GMT

Hi Hetul,

I wonder if the issue is the task never started to run?

What is the priority of the ALIVE_TASK compared to the Main_task?

Regards,

David

Re: _task_restart not working

hetul — Fri, 31 Jul 2015 17:04:34 GMT

Hello David,

Main_task has priority of 23 and ALIVE_TASK is 10. I previously said the task i'm restarting shows "terminating" after _task_restart but I just notice that it's not the case, Task Status is still active. Thanks for you help David.

Re: _task_restart not working

DavidS — Fri, 31 Jul 2015 21:49:05 GMT

Hi Hetul,

Attached is my example of being able to restart the HeartBeat_Task should anyone else want to test this.

I use a global variable to notify the HVAC_Task when the HeartBeat_Task has been running for 10 loops. The HVAC_Task will then do a restart of the HeartBeat_Task.

Note this was tested using MQX_4.1.1.

Regards,

David

Re: _task_restart not working

hetul — Mon, 03 Aug 2015 15:36:28 GMT

Thank you David. I tried your way of waiting for task to start for 10 loops and then restarting. This is working for me.