[U-Boot-Users] storing hush scripts

[U-Boot-Users] storing hush scripts

[cam at sysgo.com]

Hello,

Is there an alternative to store hush scripts, other than in an environment
variable? Could you please give details on how it works?

regards,

Carlos Mitidieri

[U-Boot-Users] storing hush scripts

[Ajay Jain]

> Is there an alternative to store hush scripts, other than in 
> an environment variable? Could you please give details on how it
works?

Infact, use (abuse) of environment variables to store the scripts is
strongly discouraged. Yes, you can download the script at run time using
UART/TFTP. The script needs a valid header to work, for details see the
'mkimage' utility present in the 'tools' directory. You will have to add
header to the script using this utility and then download it. Also,
refer to the details of 'autoscr' command. 

--
Ajay

[U-Boot-Users] storing hush scripts

[Wolfgang Denk]

In message <040401c707e4$90921860$561fa8c0@pcajain> you wrote:
> 
> Infact, use (abuse) of environment variables to store the scripts is
> strongly discouraged. 

Who says so? I strongly disagree.


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
The day-to-day travails of the IBM programmer are so amusing to  most
of us who are fortunate enough never to have been one - like watching
Charlie Chaplin trying to cook a shoe.

[U-Boot-Users] storing hush scripts

[Ajay Jain]

> > Infact, use (abuse) of environment variables to store the scripts is
> > strongly discouraged. 
> 
> Who says so? I strongly disagree.

Refering to the text below:

CONFIG_EXTRA_ENV_SETTINGS: Define this to contain any number of null
terminated strings (variable = value pairs) that will be part of the
default environment compiled into the boot image. Warning: This method
is based on knowledge about the internal format how the environment is
stored by the U-Boot code. This is NOT an official, exported interface!
Although it is unlikely that this format will change soon, there is no
guarantee either.  You better know what you are doing here.  Note:
overly (ab)use of the default environment is discouraged. Make sure to
check other ways to preset the environment like the autoscript function
or the boot command first. 

Therfore, can we not interptet that use (abuse) is discouraged?

--
Ajay

[U-Boot-Users] storing hush scripts

[Andrew]

On Wed, 15 Nov 2006 12:07:27 +0530
"Ajay Jain" <ajay050@gmail.com> wrote:

> 
> > > Infact, use (abuse) of environment variables to store the scripts
> > > is strongly discouraged. 
> > 
> > Who says so? I strongly disagree.
> 
> Refering to the text below:
> 
> here.  Note: overly (ab)use of the default environment is
> discouraged. Make sure to check other ways to preset the environment

The key word here is   .......      ^default^.
The comment is for the specific C macro to setup the default env in the
compiled image. I used it to create some standard scripts for a
standard devel setup on many boards at once.

To create and run "saveenv" to store any scripts you want on a specific
board is just fine.

[U-Boot-Users] storing hush scripts

[Wolfgang Denk]

In message <04fe01c70880$88987f40$561fa8c0@pcajain> you wrote:
> 
> Refering to the text below:
> 
> CONFIG_EXTRA_ENV_SETTINGS: Define this to contain any number of null
...
> guarantee either.  You better know what you are doing here.  Note:
> overly (ab)use of the default environment is discouraged. Make sure to
                        ^^^^^^^
> check other ways to preset the environment like the autoscript function
> or the boot command first. 
> 
> Therfore, can we not interptet that use (abuse) is discouraged?

The text only warns not to overload trhe DEFAULT environment.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Boykottiert Microsoft - Kauft Eure Fenster bei OBI!

[U-Boot-Users] storing hush scripts

[Andreas Schweigstill]

Hello!

cam at sysgo.com schrieb:
> Is there an alternative to store hush scripts, other than in an environment
> variable? Could you please give details on how it works?

mkimage (on development host) and autoscr (on U-Boot target) are your
friendd.

With best regards
Andreas Schweigstill

-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/

[U-Boot-Users] storing hush scripts

[cam at sysgo.com]

Many thanks to Ajay Jain and Andreas Schweigstill for the very quick anwser.
Best regards,

Carlos Mitidieri

> Hello!
>
> cam at sysgo.com schrieb:
> > Is there an alternative to store hush scripts, other than in an environment
> > variable? Could you please give details on how it works?

[U-Boot-Users] storing hush scripts

[Tolunay Orkun]

cam at sysgo.com wrote:
> Hello,
> 
> Is there an alternative to store hush scripts, other than in an environment
> variable? Could you please give details on how it works?

Take a look at autoscr command. You can execute scripts stored in flash 
in U-Image format.

Best regards,
Tolunay

[U-Boot-Users] storing hush scripts

[Wolfgang Denk]

In message <1163503648.4559a820a36b6@www.sysgo.com> you wrote:
> 
> Is there an alternative to store hush scripts, other than in an environment
> variable? Could you please give details on how it works?

Use a script image. Please RTFM.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
All repairs tend to destroy the structure, to  increase  the  entropy
and  disorder  of the system. Less and less effort is spent on fixing
original design flaws; more and more is spent on fixing flaws  intro-
duced by earlier fixes.       - Fred Brooks, "The Mythical Man Month"