Hi Guys,
Thnaks for the support. I have solved this issue. The problem was in the
FPGA logic which was enabling/disabling the CE0/1 signals for NAND
devices. Ideally for NAND-1 CE0 and NAND-2 CE1 should be high which was
swapped in my FPGA code. I concluded this by probing the CE0/1 signals
on the scope. I fixed this swapping error in FPGA code and everything is
working well now!!!
Once again thanks a tone for all of your support!!!
--
Regards,
Krunal
On 06/18/2010 12:46 PM, Krunal Patil wrote:
Hi,
I tried using second approach but I am not able to access 2nd nand
chip from the UBoot. When I execute command "nand dump 0x40000000"
from the Uboot I am getting error "Error (-22) reading page 40000000".
It works well till address 0x3fffffff (1GB).
--
Regards,
Krunal
On 06/18/2010 03:20 AM, Jon Povey wrote:
Steve Poulsen wrote:
1) Use hexdump to view the first bit of the bootloader and note the
data values. 2) Load a filesystem into filesystem2.
3) Use hexdump to view the first bit of the bootloader and note the
changes. 4) hexdump filesystem2 and search for the pattern. ( you
might dump it to NFS filesystem for easier searching)
Good suggestions - Krunal note if you try this first one, you may have to write
a lot of data to filesystem2 before you see it overwrite the bootloader.
If it's completely erased then writing about 512MB (0x20000000) should cross
into the second chip select. But wear levelling abstration layers may move
things around or leave gaps.
I would try Steve's u-boot approach:
1) In u-boot, use the nand commands to erase, write, and dump. You
should be able to narrow it down to "writing to block N causes block
M to also change".
--
Jon Povey
[email protected]
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