[U-Boot] How to boot a newer version of u-boot from a older one?

[Bear]

hi,
Thanks for your help. I have read that FAQ and understood your meaning. :)


On 6/6/2011 3:37 AM, Wolfgang Denk wrote:
> Dear Bear,
>
> please keep the mailing list on Cc:.
>
> In message<4DEB3B83.8010608 at Gmail.com>  you wrote:
>>
>> I sent that email via Thunderbird as Plain Text. Maybe it caused by my
>> UTF-8 encoding? I am very sorry about that.
>
> I don't know.
>
>>> For I have no USBTAP, there are no way for me to flush either NOR Flash
>>> or NAND Flash, so I am afraid if I install my u-boot to NOR Flash and
>>> that u-boot cannot run correctly, my board would be unavailable. So I
>>> wanna boot the latest version of u-boot from the original one. I tried
>>> these:
>>> =>  tftp 0x01000000 u-boot.bin
>>> =>  go 0x01000000
>>>
>>> But my board reset automatically. Could you tell me how to do with this?
>
> This doesn't work.  See the explanation in the FAQ:
> http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStartedInRAM
>
> Best regards,
>
> Wolfgang Denk
>