[U-Boot] Not able to print env variable added in standalone application

[U-Boot] Not able to print env variable added in standalone application

[Kartheek N S]

Dear all,
    I am in need of getting a status message from a standalone application.
Hence I am using getenv and setenv functions. The standalone application can
read the env variable using getenv and set the registers accordingly. Based
on what is set, I am trying to set some env variable using setenv function.
The variable gets set I think. But I am not able to print that variable
either in application or in uboot prompt ? 

    I am using run_command to jump to the standalone application which is
our requirement. But if I use "go" command from uboot prompt to run
standalone application, I am able to print that env variable.

    Could somebody help how to print env variable from standalone
application ?
    
    Is there any other place in u-boot where I need to add this variable ?.
I have added it in CONFIG_EXTRA_ENV_SETTINGS.
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[U-Boot] Not able to print env variable added in standalone application

[Wolfgang Denk]

Dear Kartheek N S,

In message <23365798.post@talk.nabble.com> you wrote:
> 
>     I am in need of getting a status message from a standalone application.
> Hence I am using getenv and setenv functions. The standalone application can
> read the env variable using getenv and set the registers accordingly. Based
> on what is set, I am trying to set some env variable using setenv function.
> The variable gets set I think. But I am not able to print that variable
> either in application or in uboot prompt ? 

If you cannot print that variable, what makes you then think that
setting it has worked?

Adding some debug code to common/cmd_nvedit.c should be a trivial
thing to do...

>     I am using run_command to jump to the standalone application which is

And you think we can read from our crystall balls hoiw exactly you
might be using "run_command"? Sorry, we're not that good.

> our requirement. But if I use "go" command from uboot prompt to run
> standalone application, I am able to print that env variable.

Well, "go" is the official, documented interface to start a standalone
application.  If this works, then all is fine, no problem to be solve.
Just use "go" then.

>     Could somebody help how to print env variable from standalone
> application ?

You just wrote that it works if you use the correct command?

>     Is there any other place in u-boot where I need to add this variable ?.
> I have added it in CONFIG_EXTRA_ENV_SETTINGS.

CONFIG_EXTRA_ENV_SETTINGS is completely unrelated to this.


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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