[U-Boot-Users] Creating a valid bmp file

[Roger Williamson]

Hello again Detlev,

      A small question before I get to the rest of my response: how much
has the bmp handling changed over the past 2 years?

Detlev Zundel <dzu at denx.de> wrote on 10/25/2007 07:38:13 PM:

> Hi Roger,
>
> > Currently I'm attempting to make my u-boot display a splash screen.
> > Currently, the display dirver is being uncooperative, so I decided to
focus
> > my attention on creating a bitmap image that will be considered
acceptable
> > to the u-boot system.
> >
> > I've read through the brief descriptions about the bmp command and
> > transfering data into the flash, but I'm having some issue getting
u-boot
> > to recognize my bitmaps.  All I'm getting out of the system is that
"There
> > is no valid bmp file at the given address."  I know that the address I
give
> > is the address of the bitmap in flash, and I am able to transfer new
> > bitmaps over to the flash, I am just perplexed on how to create a
suitable
> > bitmap image.  What am I missing.
>
> I cannot say what you are missing, but you probably can check for
> yourself.  The first check the bitmap code does is to see whether it
> can find 'B' and 'M' as the first two bytes of the image.  That's the
> magic number for bmp files[1].

      All of the files I've tried do have the tel-tale "BM" as the first
two characters, I'm glad that I'm not totally off with respect to the files
that I've tried to load.

>
> Given the error message you get, you probably do not use the "Windows
> Bitmap (BMP)" file format.  Also be aware that currently only 1 or 8
> bit per pixel formats are supported.

      Hmm... Do you or any of the U-booters know any programs for Windows,
or that'll run under cygwin that will produce OS independed bitmaps?

>
> Cheers
>   Detlev
>
> [1] http://en.wikipedia.org/wiki/Windows_bitmap
>


You've been quite helpful so far.

Thank you,
Roger.


NOTE: just disregard the legalese attached to this message, if you are
reading this... odds are you should be reading this.


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