[U-Boot-Users] make env

Manuel Sahm
2008-04-02T09:31:54Z

Hello,

I try to modify the env toll for accessing nand flash.

My problem the structure of the enviroment:
If I understand:
4 byte crc; 1 byte flags, 0x20000-5 byte data.

The Enviroment has a size of 0x20000 bytes. There is a redundant
enviroment too.(same size)

The CRC is over the data bytes,( not the flags byte included) , right ??

What about the flag byte, which values should I have to write here ?

Thank you very much

Manuel Sahm

Wolfgang Denk schrieb:
> In message <47E8F686.9020903@feig.de> you wrote:
>
>> I took the U-Boot version 1.3.2; now I am able to generate the make env
>> -> fw_printenv utility.
>>
>> I copy the jw_printenv binary and rename it to fw_setenv.
>>
> ...
>
>> I want to access a NAND flash. [Pagesize = 0x800; ERASEBLOCKSIZE=0x20000]
>>
> ...
>
>> Is this correct ?
>>
>
> No. the fw_env tools are written with NOR flash support in mind. Don't
> expect this to work unchanged on NAND flash.
>
> Best regards,
>
> Wolfgang Denk
>
>

--
Freundliche Gr??e / Best regards

Manuel Sahm

Research & Development

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