flash image from SD card

[Willie Chen]

Werner Almesberger wrote:
> I wrote:
>   
>> - I can write a special erase tool that preserves the OOB data
>>     
>
> Even better, I can simply write a tool to set the environment pointer.
> I just did that :-)
>
> svn.openmoko.org/trunk/src/target/dynenv/
> (revision 4288)
>
> Example session:
>
>     # First, we erase the u-boot partition and put the new u-boot there.
>
>     root at om-gta02:~# flash_eraseall /dev/mtd1
>     Erasing 128 Kibyte @ 20000 -- 50 % complete.
>     root at om-gta02:~# nandwrite -p /dev/mtd1 u-boot.udfu 
>     Writing data to block 0
>     Writing data to block 20000
>
>     # Let's check the environment pointer.
>
>     root at om-gta02:~# ./dynenv /dev/mtd1
>     environment pointer marker is absent
>
>     # Nothing there, of course. Now we put it back, taking into account
>     # that the offset of the environment partition is just the size of
>     # the u-boot partition.
>
>     root at om-gta02:~# ./dynenv /dev/mtd1 0x`awk '/mtd1/{print $2}' </proc/mtd`
>
>     # Lo and behold, it's back now.
>
>     root at om-gta02:~# ./dynenv /dev/mtd1
>     0x40000
>
> - Werner
>   

Hi Werner,

Yeah, Thanks for your help. Now we can erase the uboot image.

Regards,
Willie