In message cdb837ea0805152231w72340d28r4ee31ee5d4d51654@mail.gmail.com you wrote:
- Both default config of u-boot and a DHT-Walut-patched config
generate 256KB bin, but the flash on board is 512KB. So I think I should get a 512KB bin for flash writing.
Why?
Do you think on devices with 128 MB flash memory we should have a 128MB U-Boot image?
Do you see any problem with having a U-Boot image that is smaller than your flash device?
- The contents in the flash on my board is totally corrupted by
accident. It means the important last-4-bytes should be rewritten to a proper state.
Agreed.
- Currenly, I have to use special hardware to write bin into flash.
Therefore 256KB bin will only overwrite the first half. The last-4-bytes in the end of flash is still the old value.
That's your problem, tehn. Most people use a noremal JTAG debugger which can prgram the image to any address in the flash.
You got to add 256k of ramdom data in front of the 256 k image, then [memory filled with 0xFF recommended].
Best regards,
Wolfgang Denk