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AM623: RTI-Windowed Watchdog Timer reset

li weiyu
Expert 1090 points
Part Number: AM623

Tool/software:

Hi, TI expert! 

I have a development environment for am6234, with our own evaluation board.

The software SDK version is PROCESSOR-SDK-LINUX-RT-AM62X-08.06.00.42.

How can I distinguish between RTI-Windowed Watchdog Timer reset and power on reset? Is there a corresponding register？

Regards,

Li

  • +1
    TI__Guru** 101060 points

    Hello Li,

    I do NOT think that Linux watchdog timer was functional on SDK 8.6. The issue that was seen was that when the watchdog was enabled, it would reset the board after a single countdown because the code would try to pet the watchdog before the hardware's 50% window had opened up. This is the patch to fix the behavior on SDK 9.x (linux kernel 6.1): https://lore.kernel.org/lkml/20240417205700.3947408-1-jm@ti.com/ 

    That behavior is fixed by default on SDK 10.x (kernel 6.6).

    I have not tested that patch on SDK 8.6.

    Please note that I will be out of office for the rest of December. Feel free to ping the thread in January for a response.

    Regards,

    Nick