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F28069 WDT

John Hanek
Prodigy 20 points

Hi,

I had a question about writing to the WDCR register on the F28069 Piccolo device. There is a note in the Tech Reference Manual about writing to the WDCHK bits in this register, where it says:

 “Do not write to WDCHK bits when the watchdog module is disabled.”

Since the WDCHK bits must be written when the WDCR register is updated, does this mean that any change to the WDPS value must be done while the WDT is enabled?

Is there any problem with disabling the WDT if it is already disabled?

Thanks

  • 0
    Guru 192875 points

    Hi John,

    John Hanek said:
    does this mean that any change to the WDPS value must be done while the WDT is enabled?

    Yup, this is recommended. If you check the Example_2806xWatchdog.c sample code you can understand the flow better.

    John Hanek said:
    Is there any problem with disabling the WDT if it is already disabled?

    Generally, calling InitSysCtrl(); function disable the WDT by calling  DisableDog(); inturn which you can notice in F2806x_SysCtrl.c

    Regards,

    Gautam