RTOS/LAUNCHXL-CC1310: Adjusting Phase of Periodic Clock Timer

Hello Brett,

If what you are trying to achieve is to change the period of the clock timer object at runtime, then what you need to do is

       1)stop the timer

       2)reconfigure timer

       3)start it again.

Please see the bellow example:

void time_ISR(xdc_UArg arg0)
{
    //Something
}

static void time_task(uint32_t arg0, uint32_t arg1){
    Clock_Params clockParams;
    Clock_Handle clock;
    Error_Block  eb;

    Error_init(&eb);

    Clock_Params_init(&clockParams);
    clockParams.period = 1000;
    clockParams.startFlag = TRUE;
    clock = Clock_create(time_ISR, 1, &clockParams, &eb);
  
    /*
     * 
     * 
     * 
     * Calculate new Period
     * 
     * 
     * 
     * 
     */

    Clock_stop(clock);
    Clock_setPeriod(clock, 5000);
    Clock_start(clock);
}  

I hope this helps,
Andres Blanco

Hi Andres,

Thank you very much for addressing my question.  It's actually the PHASE of the clock I want to change, not the period.  I just want to nudge the phase +/- 1 tick depending on the relative clock drift.  So for example, I will be waking up periodically every 2 seconds to synch with an external event which is also periodic.    Both events are timed using a 32khz crystal, but these crystals will not run at exactly the same frequency.  For us, a drift of 100 ppm is possible which equates to a drift of 200 uS between events.  I would like to nudge the clock forward or backward occasionally to make up for this drift.  I'd rather not create a whole new clock for this every time I need to adjust the phase since that can happen quite often.  When I create a clock with Clock_construct () I am able to specify the time to the first wakeup (the phase) as well as the periodic time.  I notice it always uses this value for every subsequent stop and starting of the clock.  Is it possible for me to change this value?  That would be pretty simple.  I could change that value and just do a stop and start on the clock.  Do you follow me?

Thanks,

Brett