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Altera_Forum's avatar
Altera_Forum
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16 years ago

How to use timer defined by OSTmrCreate ?

Hi all,

I would like to use timer with MicroC/OS-II. I have already enabled it by setting to 1 OS_TMR_EN .

The functions OSTmrCreate and OSTmrStart return no error. But the timer never elapse and the associated callback is never called.

Is there any other flag to set for using timer functionnality in MicroC/OS-II ?

How to set a timer ? I have not foung any tutorials about that.

Thanks for your answer.

Patrice

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Hello,

    In v2.86, it seems that with uCOSII, you need to call yourself the function OSTmrSignal() as :

    - It post the OSTmrSemSignal semaphore which is the condition to execute the OSTmr_Task() task.

    - No other kernel function post the OSTmrSemSignal semaphore

    You can check that in the \altera\91\nios2eds\components\micrium_uc_osii\UCOSII\src\os_tmr.c file

    As far as i've seen, the uCOSII documentation seems a bit weak for this part.

    However It is quite new feature as it as been introduced in V2.81 in think.

    Maybe it was too early ;)