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Watchdog is not performed.

Kenjiro Gonda
Prodigy 110 points

Other Parts Discussed in Thread: TMS320F2810

Hi everyone,

My customer executed a test similar to ESD (electrostatic discharge) test by the system using C2000 (TMS320F2810).

The system seems to freeze, when static electricity noise is applied to the ADC input line that is connected to a sensor. Moreover, the system could not reboot by a watchdog timer.

However, my customer want to reboot the system by watchdog timer or other ways.

What should we do?

Regards

 

  • 0
    Guru 192875 points

    Hi,

    Visit this link: http://www.ti.com/tool/sprc097

    Download the zip file -> From the examples folder -> import the "watchdog" sample code

    This will help you implement the watchdog timer. Also:

    The system seems to freeze, when static electricity noise is applied to the ADC input line that is connected to a sensor.

    I've performed the same test but my observations were:

    1. The JTAG interface between hardware and CCS hangs

    2. But, the system continues to work.

    I don't know what hardware you're using so can't comment in detail.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Prodigy 110 points

    Gautam-San,

    Thank you for your reply and informations.

    > I don't know what hardware you're using so can't comment in detail.

    Yes, that's right. But I also don't know details of the hardware that my customer using.

    By the way, I understand now, that latch-up may occurs in the device by excessive static electricity noise.
    In general, how much voltage(kV) static electricity noise that the device allows?
    And, can I detect that the device has been latch-up, by measuring something signals (clock, voltage, current) from the outside of the device?

    Regards

     

  • 0 in reply to Kenjiro Gonda
    Guru 192875 points

    Kenjiro-San,

    In general, how much voltage(kV) static electricity noise that the device allows?

    There's no documentation mentioning such information. 

     And, can I detect that the device has been latch-up, by measuring something signals (clock, voltage, current) from the outside of the device?

    You won't be able to monitor the latch-up condition! So implementing the watchdog properly seems to be the only solution.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Prodigy 110 points

    Gautam-San,

    Thank you for your reply and informations.

    You won't be able to monitor the latch-up condition! So implementing the watchdog properly seems to be the only solution.

    I understood that I can't detected latch-up. However, in my perception, watchdog doesn't work anymore in the latch-up condition.

    Regards