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

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

[u-boot user]

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

[Markus Klotzbücher]

u-boot user <aparna_badve@yahoo.com> writes:

> 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

So you're obviously not using the newest version of U-Boot, what you
should. Make sure to read the updated README in tools/env/.

> 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 

Is this in /etc/ ?

> 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? 

Probably some mismatch between the information in your config file and
the real environment. Where is you're environment located in flash? Is
your mtd partitioning right? What does 

$ cat /proc/mtd

show?

> 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

Weird. I would guess your MTD partitioning is wrong.

Best regards

Markus Klotzbuecher

--
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

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

[techie_vasu]

Hello,

  Can you please tell me how to build the fw_setenv and fw_printenv using
the mtd-user.h file? I am new to Linux. Please help. I don't see mtd/ in
proc/ directory.

Thanks


u-boot user wrote:
> 
> 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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[U-Boot-Users] problems with CRC in fw_printenv and fw_setenv utility and use

[Markus Klotzbücher]

techie_vasu <deepavas@gmail.com> writes:

>   Can you please tell me how to build the fw_setenv and fw_printenv
>   using

Please make sure to read tools/env/README from *top of tree* U-Boot
sources.

> the mtd-user.h file? I am new to Linux. Please help. I don't see mtd/ in
> proc/ directory.

What kernel version? Looks like you have not compiled in mtd support.

Best regards

Markus Klotzbuecher

--
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

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

[techie_vasu]

Hello,

  Can you please tell me how to build the fw_setenv and fw_printenv using
the mtd-user.h file? I am new to Linux. Please help. I don't see mtd/ in
proc/ directory.

Thanks


u-boot user wrote:
> 
> 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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