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

[Detlev Zundel <dzu@denx.de>]

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].  

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.

Cheers
  Detlev

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

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