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AWR1243: watchdog timer period

Takeo Sekiguchi
Expert 3305 points
Part Number: AWR1243


Hello,

1) I'd like to know the watchdog period if it configure to enable.  Is that Frame period * CALIB_MON_TIME_UNIT, and watchdog window size is 12.5% from ICD table 9.5 (SW overhead of FTTI...)? Or, another value?

2) I could not find the watchdog clean failure in monitoring list in ICD. Do that mean AWR1243 watchdog configure to  watchdog reset (not NMI) mode?

Regards,

Takeo

  • 0
    TI__Expert 7215 points
    Sekiguchi-san,

    Yes, Watchdog period is configurable as Frame period * CALIB_MON_TIME_UNIT.

    Anand will provide more details on watchdog window and the ICD details

    Regards,
    Kaushal
  • 0 in reply to Kaushal Kukkar
    TI__Expert 3305 points
    Hi Kaushal,
    Thank you for your reply.

    Anand,
    Could you comment to my question (2). My interesting points are, watchdog failure monitoring method and (if it's poissible) there is a way to modify watchdog periold by user or not.

    Regards,
    Takeo
  • 0 in reply to Takeo Sekiguchi
    TI__Genius 15005 points
    Hi Sekiguchi-san,

    The watchdog period depends on the CAL_MON_TIME_UNIT and the frame period. The watchdog is a windowed watchdog and can only be cleared within a specific window. This window is about 12.5% of (CAL_MON_TIME_UNIT * FRAME_PERIODICITY).

    I will get back to you on Tuesday on the watchdog failure monitoring method.

    Best Regards,
    Anand
  • 0 in reply to Anand Gadiyar
    TI__Genius 15005 points
    Hi Sekiguchi-san,

    In AWR1243 there are two watchdog timers. Both are used only for monitoring internally scheduled activities of the device.
    The explanation I gave in the previous reply was for the BSS WATCHDOG.

    The MSS watchdog periodicity can be configured using the rlDeviceEnablePeriodicTests() API, with the minimum period being 40ms. This configures the period at which the MSS periodic tests are run, and the watchdog is enabled for the same periodicity.

    For both of these watchdogs, if the watchdog timer expires, then the AWR1243 will reset. The warm reset line should toggle when this happens.

    Best Regards,
    Anand
  • 0 in reply to Anand Gadiyar
    TI__Expert 3305 points

    Hi Anand,

    Thank for explanation.

    I could not find the windowed watchdog type configuraion in rlDeviceEnablePeriodicTests() or another APIs in ICD.  If there is a way to configure the window (like 12.5%, 25%, ....) for MSS watchdog timer, could you tell me how to configure?

    Regards,

    Takeo

  • 0 in reply to Takeo Sekiguchi
    TI__Genius 15005 points
    Hi Sekiguchi-san,

    I'm afraid there is no configurability on this window. The watchdog timer is used for monitoring internally scheduled activities, so these settings are fixed and not available to the user.

    Best Regards,
    Anand