[U-Boot-Users] Uboot Splash Screen

[U-Boot-Users] Uboot Splash Screen

[Roger Williamson]

Right... The arcitecture is arm, the module is a PXA270.  The odd bit about
this whole mess is that the 'board' is actually a business-card sized board
which we plug into our main-board.  That is a CCXP270 by Digi
International.  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out-of-date version of U-boot, should I update my Uboot to the most recent
version?

Anyway, here's the config file: (man it's huge)

(See attached file: ccxp.h)

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


On 9/18/07, Roger Williamson <Williamson.Roger@orbital.com> wrote:
>
> Fellow U-booters,
>
>       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.  I'm currently
> using an LCD screen with a resolution of 640x480 (landscape) in 8 bit
mode,
> and I have a bitmap with the same dimentions 640*480*8 loaded into the
> memory at the microcontroller's recommended memory address, and I have
the
> bitmap image converted into a header file and used as the bmp_logo.h
file.
>
>       Unfortunately, the modifications I've made don't seems to change
the
> fact that the screen just fades from white to black and back, or really
how
> fast the screen does so--the image I'm using is mostly white with some
red
> text.


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[U-Boot-Users] Uboot Splash Screen

[Clemens Koller]

Hi, Roger!

Roger Williamson schrieb:
> Right... The arcitecture is arm, the module is a PXA270.  The odd bit about
> this whole mess is that the 'board' is actually a business-card sized board
> 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 out-of-date version of U-boot, should I update my Uboot to the most recent
> 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.

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

http://www.anagramm-technology.com
Phone: +49-89-741518-50
Fax: +49-89-741518-19

[U-Boot-Users] Uboot Splash Screen

[Roger Williamson]

Clemens,

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




Hi, Roger!

Roger Williamson schrieb:
> Right... The arcitecture is arm, the module is a PXA270.  The odd bit
about
> this whole mess is that the 'board' is actually a business-card sized
board
> 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
recent
> 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.

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

http://www.anagramm-technology.com
Phone: +49-89-741518-50
Fax: +49-89-741518-19

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-----------------------------------------
Notice:  This e-mail is intended solely for use of the individual
or entity to which it is addressed and may contain information that
is proprietary, privileged and exempt from disclosure under
applicable law.  If the reader is not the intended recipient or
agent responsible for delivering the message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly
prohibited.  This communication may also contain data subject to
U.S. export laws.  If so, that data subject to the International
Traffic in Arms Regulation cannot be disseminated, distributed or
copied to foreign nationals, residing in the U.S. or abroad, absent
the express prior approval of the U.S. Department of State.   If
you have received this communication in error, please notify the
sender by reply e-mail and destroy the e-mail message and any
physical copies made of the communication.  Thank you.

[U-Boot-Users] OT: Re: Uboot Splash Screen

[Clemens Koller]

Hello, Roger!

Please don't top-post.

Roger Williamson schrieb:
 >       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.

Thanks... my response time might be inversely proportional to the amount
of blood in my caffeine. ;-)

 >       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.

Check HSYNC, VSYNC and the Pixel CLK and the supply voltages if they are
within the spec. (i.e. on the small standard TTL display interfaces)
If the display controller has also a working driver on Linux' side, you
should be able to figure out the right timing parameters for your display,
too (embedded in some timing tables). Transfer that to U-Boot and see what
happens.

 >       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.

Okay, some people propably won't help you if they care about this legal
stuff more than I do.

Regards,

Clemens Koller
__________________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Stra?e 45/1
Linhof Werksgel?nde
D-81379 M?nchen
Tel.089-741518-50
Fax 089-741518-19
http://www.anagramm-technology.com