In message 200604270900.14579.ngustavson@emacinc.com you wrote:
The target board is our SoM-5282M, http://www.emacinc.com/som/som5282em.htm
Maybe before asking for free help here you should feed your patches back into the public tree.
I don't see why "the flashing utility needs to calculate a checksum" - the uImage file already has two checksums, so no new calculation should be needed.
For verification during the writing process.
You don't want to verify this "during the writing process". This makes no sense. You probably want to verify it *before* erasing the image in flash (so that you keep the old image if the downloaded one was corrupt), and *after* writing has completed (so you can be sure that the flash content is ok).
I have no idea what you could need special tools for.
It needs to be an easy to use utility (This utility could be a shell script)
"mkimage" is trivial to use. It just requires the "-l" option and a file name argument.
I realize it's not that complicated an issue, and I could probably figure it out in an hour or two. But somebody's probably already done this, why not just ask?
I just told you: this *has* been solved. "mkimage" perfectly does the job. No new code is needed.
Actually this has nothing to do with uClinux, and very little with U-Boot.
It requires a small amount of knowlege of raw access to MTD, the format used
This is standard Linux stuff and not uClinux specific.
by mkimage, and it would be nice to know I'm not reinventing the wheel.
You don't need to know the mkimage format, as the mkimage tool is perfectly capable of reading and checking such images.
Best regards,
Wolfgang Denk