because characters couldn't be written in red, so I put the wrong contents as
following:
bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
I really appreciate any suggestions very much.
dajiang.zhong wrote:
>
> Hi, every one.
> This is my first time of posting a message here, firstly , thanks for any
> body who builds such a nice platform give help.
> In recent two weeks, I added a NAND flash driver support for Micron's
> MT29F2G08ABD (SLC;page size: x8 2048+64bytes; Block size: 64 pages; Device
> size: 2Gb) memory chip base on u-boot 2009.08 for i.mx25. Block Erasing
> and Page Programming functions worked properly, but when I do page
> reading operation, "UnCorrectable RS-ECC Error" error message prompted.
> I checked the NFC (NAND Flash Controller) spare area buffer and found that
> the 4th 512-byte spare area buffer's data were very weird, there is not
> any ECC code that should be generated by the FEC but contained the data
> what I programmed to the memory.
> In order to easy to do troubleshooting works, I make a simply testing
> process, what I do is, firstly, I only erase page 0 of block 0, and later
> I program the erased page with a 2k file which consisted of 2048 same
> character 'E', at last I read the page back , but "UnCorrectable RS-ECC
> Error" occurs. I pasted the contents of NFC's spare area buffer as
> following:
>
> bb001000: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001010: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb001020: 5f7467b9 21650de8 4d97fbd0 3166372c .gt_..e!...M,7f1
> bb001030: 3b7e8bef b1cf62a5 bb8f50f6 de0031b3 ..~;.b...P...1..
> bb001040: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001050: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb001060: bafcf1fa 0c0698ef 09089d72 e6200c80 ........r..... .
> bb001070: d638f5ef 20130b40 591dd763 e224f527 ....@.. c..Y'.$.
> bb001080: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001090: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb0010a0: 76fa88ba 7a648809 d27bbc43 6b2b81cf ...v..dzC.{...+k
> bb0010b0: f6b95e3b 1286638e 73d324fb 22880ce5 ;^...c...$.s..."
> bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
> bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
> bb0010e0: 36d8f3d5 0099a9e7 eb289d07 11664624 ...6......(.$Ff.
> bb0010f0: 4fbb9f24 505ab041 25ff61f6 43280406 $..OA.ZP.a.%..(C
>
> Contents written in red characters should be ECC code, but changed to
> what I programmed to the memory in preverious programming process.
> Any advice, please feel free to tell me. Thanks very much in advance.
>
> Thanks & Regards,
> Leon Zhong
>
>
>
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>
>
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