[U-Boot-Users] problems with CRC in fw_printenv and fw_setenv utility and use

[u-boot user <aparna_badve@yahoo.com>]

Hello all,

I have built the binary fw_printenv by using mtd-user.h from mtd-utils on
the internet as it fw_printenv won't compile it without using that file. So
I have used mtd-user.h and mtd-abi.h. The contents of my configuration file
are 
# MTD device name       Device offset   Env. size       Flash sector size
/dev/mtd1               0x0000          0x4000          0x4000 

When I run fw_printenv  it complained with error Warning : Bad CRC using
default environment in env_init function in fw_env.c source code. To gain a
better understanding I print the value crc1 calculated using
crc32(0,environment.data,ENV_SIZE).  The value it prints is CRC
computed:FE641197
If I print the environment.crc value it is D0CA8A0E. As the checksum values
are different crc1_ok is not set and I get the error. Any clue as to why
these values would be different? 

When I use the fw_setenv utility to set an environment variable it gives the
following errors 
Writing CRC value to flash: D0C78567
Unlocking flash...
Other dev values are: 0
Current dev value: 0
Done
Erasing old environment...
MTD erase error on /dev/mtd1: Invalid argument
Error: can't write fw_env to flash

I want to be able to set bootvars and print bootvars from user space Linux
code. Linux has support for mtd-utils we tested the mtd-utils interface.

I look forward to your replies. I appreciate your help.

Thanks and Regards
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