[U-Boot-Users] want to know scenario

Detlev Zundel
2007-07-18T12:17:00Z

Hi Sapirf,

> How u-boot treats the following commands:

Your question is really cryptic. If you do have a running U-Boot, you
probably know the answers, but hey sometimes even I don't believe my
own eyes.

> setenv ipaddr 192.168.2.202
> saveenv
> printenv

This shold change ipaddr to what you tell U-Boot, save it to
persistent storage (whereever that is on your board) and finally dump
the whole environment.

> reset

Wow, now you reset your board...

> go

... and force the next incarnation of U-Boot to display an error
message as you didn't provide a second argumtn.

> printenv

But the environment is still there!

> vs
>
> saveenv
> printenv
> reset
> go
> printenv (is there a possiblity of failure in this command)?

Well, the error message is printed at a different time and you don't
change ipaddr - and no printenv will never fail as long as your
hardware lives.

By now I am pretty sure I did not understand your question, so maybe
you try again...

Cheers
Detlev

--
Man is a fool, and woman, for tolerating him, is a damned fool
-- Mark Twain
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
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