how-to get u-boot prompt again twr-ls1021A

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how-to get u-boot prompt again twr-ls1021A

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aimadrhatay
Contributor I

Hi all,

I changed the video-mode in u-boot prompt (unfortunately to a wrong resolution). that was in order to use hdmi.

now i am getting an ennoying unsupported resolution error, and i am unable to get back the u-boot command promt to change it to a good value.

Any one can help ? thank

btw, usual esc at boot doesn't work

i am using the twr-ls1021A board

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addiyi
NXP Employee
NXP Employee

You could erase the uboot_env, using for example CodeWarrior for ARMv7. When uboot_env is erased, uboot will recreate a default env and this may be helpful in your case.

Adrian

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aimadrhatay
Contributor I

Hi,

Thanks for the the tip. No other way ?

Kind regards,

aimad

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addiyi
NXP Employee
NXP Employee

Switch to alternate bank, if you have something valid there.

Adrian

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aimadrhatay
Contributor I

Hi,

My understadanding now is that U-boot could be custumized only one time (for each bank). I am correct ?

Meaning that i have to regprogram the banks ....

Aimad

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addiyi
NXP Employee
NXP Employee

You can change the uboot env for many times. But, in your situation (unable to get back the u-boot command prom), uboot env must be overwrite.

Adrian

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