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@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
You've been quite helpful so far.
Thank you, Roger.
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