MQX Software SolutionsのトピックRe: Need help: periodic timer semaphore block

Need help: periodic timer semaphore block

OldPeculier — Mon, 10 Sep 2012 13:44:39 GMT

Hi team. I setup _timer_start_periodic_every(), but it only executes twice and then TAD reports the timer status as lw_semaphore_block. The timer has the highest priority and all other tasks are time slice. This is part of a larger program I inherited and I don't know how to track it down. Thanks!

Re: Need help: periodic timer semaphore block

c0170 — Tue, 11 Sep 2012 13:52:49 GMT

Hello OldPeculier,

I propose to check files in folder \source\timer.

Probably good start is _timer_test function which might unveil an error what has gone wrong or at least debug/check ti_task.c file where is the task and also timer ISR.

Regards,

MartinK

Re: Need help: periodic timer semaphore block

OldPeculier — Tue, 11 Sep 2012 16:25:20 GMT

Thanks Kojto,

I think I solved it: When a task "creates" a task, the parent can terminate ant the child is active. I assumed this was true for creating a timer as well, but it seems the timer must be in an active task. In this case I moved the "timer_start..." to an active, low-priority time slice task and now it works. Can anyone confirm this?

Re: Need help: periodic timer semaphore block

c0170 — Wed, 12 Sep 2012 07:19:13 GMT

Hello,

timer component creates new task with a priority set to TIMER_DEFAULT_TASK_PRIORITY by default. If you have more active tasks, your application has to assure timer task gets time to run.It must be active in order to be functional.

Regards,

MartinK