How to force imx6 into serial download mode when boot fuses is set to boot from eeprom

[sivaalagarsamy]

We have a board that has fuses set to boot from eeprom. I have uboot loaded in the eeprom and it boots into uboot fine.
I need to run the memory stress test on it. As I understand, there is a SDboot version which needs UART1 and there is a USB OTG version which requires the board to run in serial download mode.

I don't have access to UART1, but I have access to USB OTG, How do I force the board to run in serial download mode?

If I earse the u-boot from eeprom and not have any SD card, will it go into serial download mode? If so, do I have to erase the eeprom in any particular way so the imx6 knows that there is nothing in eeprom to boot and falls back to serial download mode.

Thanks,

Siva

[igorpadykov]

Hi Siva

you are right, it is sufficient to erase eeprom (in particular dcd header region)

so processor falls to serial download mode.

Best regards

igor

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