sysbios: what is difference between timer and periodic task

NewBee

Other Parts Discussed in Thread: SYSBIOS

I have code that uses periodic task.To syncronise different event called by that task, semaphores are used. Now I have to use sysbios timer instead of that Periodic task, then what modification i need to considered??

semaphores are still required in timer?

I am confused between periodic task functionality and Timer module so please explain me....

Thanks & Regards

Newbee

over 11 years ago

0 NewBee over 11 years ago

Intellectual 360 points

If i try to use sem_pend in timer module then I got message

ti.sysbios.knl.Semaphore: line 208: assertion failure: A_badContext: bad calling context. Must be called from a Task.
xdc.runtime.Error.raise: terminating execution

0 Moses Isang over 11 years ago in reply to NewBee

TI__Expert 8175 points

Newbee,

The timer module presents an easy way to use and configure your device timer. You can create a timer and configure it to be one-shot or continuous and to call a specified function when the timer expires. You do not need semaphores when using timers as the timer interrupt is actually a Hwi and you cannot block using sem_pend on a Hwi.

In your case, maybe you can create 2 timer instances with different functions to handle your 'events'

Let me know if this helps.

Moses

0 NewBee over 11 years ago in reply to Moses Isang

Intellectual 360 points

Thanks for your reply

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sysbios: what is difference between timer and periodic task