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AWR1642: Watchdog timer test case

Ramana Uppala
Prodigy 195 points
Part Number: AWR1642

Hello,

I am working to enable watchdog timer in the awr1642 board.For that i started executing test example from drivers folder.

I didn't see any output after executing the example with testExpression value 1.

Can someone help how to make watchdog working.

  • 0
    TI__Mastermind 24955 points
    Ramana,

    Please take a look at this whitepaper that discusses the watchdog timer for the mmWave devices.

    www.ti.com/.../swra590a.pdf

    Regards,
    Kyle
  • 0 in reply to Kyle Cousino
    Prodigy 195 points

    Kyle,

    I had gone through the document.It says MSS will control both BSS and DSS.So I executed watchdog timer test case from drivers folder on MSS.
    In the code they have given the following options:


    Please select the type of test to execute:
    1. Watchdog reset test
    2. Watchdog interrupt CPU test
    3. Watchdog DSP interrupt CPU test

    I opted for option number 1 which is watchdog reset test.
    Still I can't observe any change in the board(AWR1642).
    My question is what happens when watchdog restarts?
    How we will get to know that watchdog reset happened in the board?

    Please assist me in these .

  • 0 in reply to Ramana Uppala
    TI__Mastermind 24955 points
    Ramana,

    You will need to probe the WARMRESET pin on the device. When using the internal watchdog timer, if the AWR1642 does not update the timer, the device triggers the WARMRESET pin. The device will perform an internal reset.

    As stated in the whitepaper: "The WARMRESET output signal is used to inform the external devices that a reset has occurred. The NERROROUT output signal can be used to inform the external devices that an error is detected. When the software restarts, the WARMRESET signal is released."

    If you have an AWR1642BOOST EVM, you will likely need to make some modifications to the board in order to bring out the WARMRESET pin. You can then observe this pin on an oscilloscope.

    Regards,
    Kyle