In message 20060428070721.31282.qmail@web15909.mail.cnb.yahoo.com you wrote:
mkimage does not display the checksum, but it checks it, and you get error messages and appropriate exit code in case of error.
That's not enough in some cases. Factory engineers need CRC32 checksum of a ROM image for programming
Both of the checksums stored with the U-Boot image are internal checksums, which are computed over certain areas in the image. None of these checksums is goot for use with a programmer.
On the other hand, all programmers I know are capable of computing the checksum themself.
verfication. Besides,a stuff like U-Boot/Kernel/ Rootfs combination cannot be checked by mkimage -l.
Obviously not. But nobody ever clamined that.
So seems an utility which can check the image's CRC32 checksum is better. I used to download the stuff to RAM in u-boot and got the result with crc32 command:-)
You have different purposes, so other tools are more appropriate for you. But these tools also exist, i. e. there is no need to write any new code.
Best regards,
Wolfgang Denk