topic Re: MKE18F Fast Test WDOG Not Resetting During the TST High Test in Kinetis Microcontrollers

MKE18F Fast Test WDOG Not Resetting During the TST High Test

sean_dvorscak — Fri, 18 Dec 2020 21:48:59 GMT

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?

Re: MKE18F Fast Test WDOG Not Resetting During the TST High Test

nxf58904 — Mon, 21 Dec 2020 08:45:57 GMT

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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Re: MKE18F Fast Test WDOG Not Resetting During the TST High Test

sean_dvorscak — Mon, 21 Dec 2020 15:11:25 GMT

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?

Re: MKE18F Fast Test WDOG Not Resetting During the TST High Test

nxf58904 — Wed, 23 Dec 2020 09:24:16 GMT

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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Re: MKE18F Fast Test WDOG Not Resetting During the TST High Test

sean_dvorscak — Mon, 04 Jan 2021 21:21:52 GMT

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

Thank you for noticing that.