i.MX ProcessorsのトピックRe: How to enter into Uboot cmd UI

How to enter into Uboot cmd UI

tony_l_cai — Tue, 20 Jan 2015 07:04:21 GMT

Hi，All

Now I want to use imxotp，but before using it，I should enter into the uboot cmd UI，and I dont know how to enter it. Some info told me,when I loaded the uboot via the mfg tool and then uboot cmd UI would show up after the uart was started automatically.

But all of these didnt happen. So I want to know the steps how to do after load uboot in detail. and more importantly, what I used is our customized board. So please help me!

Re: How to enter into Uboot cmd UI

dry — Tue, 20 Jan 2015 07:33:44 GMT

By u-boot cmd UI you mean the u-boot command prompt / shell?

Do you see u-boot traces while the board is booting, like:

U-Boot 2011.12 (Jan 16 2015 - 09:22:38)

......

Hit any key to stop autoboot: 0

Using ...

.....

Loading: ### ...

Re: How to enter into Uboot cmd UI

dry — Tue, 20 Jan 2015 13:15:11 GMT

Hit any key to stop autoboot: 0 <-- Do you see it counting at this stage ( I think default is 3 secs), or not?

If yes, you should be able to hit a key at this stage and autoboot is interrupted and you *should* get the u-boot shell.

If it's not counting then this wait delay must be disabled, and you can enable it and rebuild u-boot and upload it.

Re: How to enter into Uboot cmd UI

dry — Tue, 20 Jan 2015 13:28:21 GMT

Also check this link, for modifying u-boot from linux. (if your distro does not have it built already..)

http://linuxforengineers.blogspot.com/2012/12/modify-u-boot-configuration-in-linux.html