MKE18F Fast Test WDOG Not Resetting During the TST High Test

[sean_dvorscak]

I am trying to use the fast test mechanism for the watchdog peripheral.

I have it set up to perform the LOW byte test first and then the HIGH byte test if the LOW test passes.  The LOW test completes with no issues.  When I do the HIGH test, for some reason the watchdog does not seem to reset.  I have a while(1) after I configure the watchdog, and no matter how long I wait, it never gets unstuck.

I wanted to see if anyone else has had this issue since I can't find anyone with this issue yet.

Is there something special you have to do to test the HIGH byte?  Is my test failing?

[nxf58904 · Accepted solution]

Hi,

I have debugged your code . The low and high byte testing works fine.But I find an issue,that it will enter high test again after reset.

And I add  BOARD_InitPins(); BOARD_BootClockRUN(); BOARD_InitDebugConsole(); to the project ,so that i can print debug formation.

Have a great day,
TIC

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[sean_dvorscak]

It was that error on my part.  It was entering the high test after I already tested it.

Thank you for noticing that.

[nxf58904]

Hi,

Have you configure the WDOG_CS before testing?

Do you excute this statement?

config.testMode = kWDOG32_HighByteTest;

The sdk pack has a watch dog test about byte testing. It tests low byte and high byte.

You can refer this example code that you can download from https://mcuxpresso.nxp.com/en/select.

Have a great day,
TIC

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[sean_dvorscak]

Hello,

Yes I set the TST field to 0b11 after the low byte test.

I attached the procedure that I am doing.  I just stuck this inside system_MKE18F16.c file.  This is performed before main, is there issues with doing that?  Should I set the update field to allow for reconfiguration?