topic Re: WDOG problem in i.MX Processors

WDOG problem

fabio_poiatti — Thu, 13 Feb 2020 12:33:13 GMT

I'm debugging WDOG circuit coming from the EVK for IMX6ULL.

I tried to read the register WDOG1_WCR but with bus error

/unit_tests# ./memtoool 0x20bc000 1
Reading 0x1 count starting at adUnhandled fault: external abort on non-linefetch (0x1008) at 00
pgd = 88718000
[76f63000] *pgd=88c4f835, *pte=020bc703, *ppte=020bce33
dress 0x020BC000

Bus error

Why???

Do you have an examples about how WDOG works?

thanks

Re: WDOG problem

igorpadykov — Thu, 13 Feb 2020 23:48:02 GMT

Hi Fabio

one can check if wdog clocks are enabled in CCM_CCGR3 register,

for testing one can try unit tests:

wdog\test - imx-test - i.MX Driver Test Application Software

Best regards
igor
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Re: WDOG problem

fabio_poiatti — Thu, 20 Feb 2020 10:34:57 GMT

the clock in CCN_CCGR3 is correctly enabled

the test you indicated die :-(

it is not able to access to register 0x21cc000 ... it blocks

Any other suggestion?

Thanks

Re: WDOG problem

igorpadykov — Thu, 20 Feb 2020 13:07:19 GMT

unit tests should work fine with nxp linux releases from

source.codeaurora.org/external/imx/linux-imx repository
linux-imx - i.MX Linux kernel

So suggest try them or Demo Images from

i.MX Software and Development Tools | NXP

Best regards
igor