Hi Rishi,
I have a board which has a version of u-boot on it that I would like to save before overwriting. I did not flash this version so I do not have the source code for it.
I am trying to figure out is there away to essentially do a 'tftp get' of the u-boot.bin that was originally written to flash. I do not see any methods to "read" data from U-boot back to the PC. Is there any method to do this?
The only thing that I know of is CONFIG_CMD_SAVES which does a "save S record over serial line" (check common/cmd_load.c). It is likely that your binary U-Boot does noe have this feature though (it is not in config_cmd_default, so the board maintainer has to define it explicitely).
When I needed to do this, I could either attach a BDI3000 which can do a tftp put (remember to create the file on the host first, otherwise it will fail silently!), or I used a linux kernel that was able to read U-Boot through the mtd interface.
If you decide to implement a "tftpput" command, I for one would find this a very nice addition indeed ;)
Cheers Detlev