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RTOS/MSP432P401R: Can't set watchdog timeout

ferdster
Expert 1125 points

Part Number: MSP432P401R

Tool/software: TI-RTOS

Starting with the watchdog example, I am trying to set the timeout. But calling Watchdog_convertMsToTicks() (return 0) and Watchdog_setReload() (return -3) both return as being unsupported by the MSP432.

So, how do I change the watchdog timeout?

Thanks.

  • 0
    TI__Mastermind 25045 points
    Hello,

    Let me give this a try and I'll get back to you. By the way, which version of the SDK are you using??

    Thanks,

    David
  • 0 in reply to DavidL
    Expert 1125 points
    I am using SDK version 1.30.00.40, but just now checked and see that there is a new version. I signed up for updates, but never received an email.
  • 0 in reply to ferdster
    TI__Mastermind 25045 points

    Hello,

    Currently those API are not supported for the MSP432.

    /*
 *  ======== WatchdogMSP432_setReload ========
 */
int_fast16_t WatchdogMSP432_setReload(Watchdog_Handle handle, uint32_t value)
{
    /* Not supported for MSP432 */
    DebugP_assert(false);
    return (Watchdog_STATUS_UNSUPPORTED);
}

/*
 *  ======== WatchdogMSP432_convertMsToTicks ========
 */
uint32_t WatchdogMSP432_convertMsToTicks(uint32_t milliseconds)
{
    /* Not supported for MSP432 */
    return (0);
}

    Hopefully they will get implemented in the near future.

     Best regards,

       David

  • 0 in reply to DavidL
    Expert 1125 points
    Since it can't be set, what is the default timeout time?

    Say I have a loop that gets executed every 5 seconds that could potential get stuck for whatever reason. So I would like to setup a 10-second watchdog timer. How would I accomplish this, or is that not possible for now?

    Thanks.
  • 0 in reply to ferdster
    TI__Mastermind 25045 points

    Hello,

     Yes this is possible and there are a few ways to accomplish this.

    The easiest way it to change the  .clockDivider in watchdogMSP432HWAttrs from WDT_A_CLOCKDIVIDER_8192K to WDT_A_CLOCKDIVIDER_128M.

    const WatchdogMSP432_HWAttrs
    watchdogMSP432HWAttrs[MSP_EXP432P401R_WATCHDOGCOUNT] = {
    {
        .baseAddr = WDT_A_BASE,
        .intNum = INT_WDT_A,
        .intPriority = (~0),
        .clockSource = WDT_A_CLOCKSOURCE_SMCLK,
        .clockDivider = WDT_A_CLOCKDIVIDER_128M
    }
};

    That should give a ~11 seconds timer, please see the table below.

    Another way is to change the clock source speed (ex. from12MHz to 6MHz) or changing the clock source from SMCLK to ACLK.

      Hopefully this helps.

        David

  • 0 in reply to DavidL
    Expert 1125 points
    Perfect, that works.

    Thanks.

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