Question, i.MX28, how to know the souce of reset

[Aemj]

Dear team,

My customer’s product using with i.MX28 will have a feature of auto-reset caused by some reason such as thermal violation or WDT.

Could you show me how i.MX28 software can know about the cause of reset after re-boot?

Are there any ways to read out the causes of reset?

Thanks,

Miyamoto

[igorpadykov]

Hi Miyamoto

please check sect.22.8.7 Persistent State Register 0 (HW_RTC_PERSISTENT0)

i.MX28 Reference Manual

http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdf

For test one can mask wdog reset with register HW_RTC_DEBUG[WATCHDOG_RESET_MASK]

Best regards
igor
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