[U-Boot-Users] Uboot Splash Screen

Roger Williamson Williamson.Roger at orbital.com
Wed Sep 19 16:55:23 CEST 2007


      The company we got he board from has become increasingly unhelpful,
so I figured I'd contact the U-boot people since you are 1) bound to be
more helpful, 2) have to be faster than a 1 week turn around time and 3)
actually created this particular technology.

      Thank you for your advice.  I finally have the datasheet for the LCD
screen, so I'll be modifiying the configuration for a little while.  So it
looks like a clocking issue.  That seems resonable.

      As far as that notice goes... I didn't intentionally put that there,
it must be my company trying to dodge any inferred responsibilty in this
email, I'll try and remove it if I can.

Roger Williamson
Orbital TMS -- Colombia
CE Software Engineer
(443) 259-7320

             Clemens Koller                                                
             <clemens.koller at a                                             
             nagramm.de>                                                To 
             Sent by:                  Roger Williamson                    
             u-boot-users-boun         <Williamson.Roger at orbital.com>      
             ces at lists.sourcef                                          cc 
             orge.net                  u-boot-users at lists.sourceforge.net  
                                       Re: [U-Boot-Users] Uboot Splash     
             09/18/2007 06:19          Screen                              

Hi, Roger!

Roger Williamson schrieb:
> Right... The arcitecture is arm, the module is a PXA270.  The odd bit
> this whole mess is that the 'board' is actually a business-card sized
> which we plug into our main-board.  That is a CCXP270 by Digi
> International.

Did you contact them already?

>  They shipped us the development environment which included
> some version of U-boot vintage 2005.  Since this is almost certainly an
> out-of-date version of U-boot, should I update my Uboot to the most
> version?

Generally yes. But that doesn't necessarily mean that this will solve your
current problem.

>>       I've run into an issue with my uboot, I want to display a bitmap
>> image when the system boots; however, all the screen does at startup is
>> fade from white to black and back until the OS boots up.

The TFT Displays I've seen fade slowly their colors and settle with
some line or block artefacts or flash when they are not clocked properly.
If you let them that way for some time (several hours) the liquid
crystal stuff gets polarized (or whatever effect that is) and the stripes
will stay forever. Check that the clocking fits to the datasheet.

> -----------------------------------------
> Notice:  This e-mail is intended solely for use of the individual
> [...]

Remove that crap, when posting to public lists.

Clemens Koller
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen

Phone: +49-89-741518-50
Fax: +49-89-741518-19

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