Re: Re: [ECOS] nor flash issue

Re: Re: [ECOS] nor flash issue

[Syed Ismail]

On Tue, 27 Nov 2007 Gary Thomas wrote :
> Andrew Lunn wrote:
> > On Mon, Nov 26, 2007 at 06:01:46PM -0000, Syed Ismail 
> wrote:
> >> Hi
> >>   I have an arm based processor and amd nor flash. I 
> built redboot for mx31 ADS board and everything works 
> fine. We have a custom board and are building redboot 
> for it. Here is my problem.
> >> i do fis write and when i read the written space 
> using x -b...., I get a corrupted data(for eg,"data" is 
> listed as "dada" in flash). 
> >> I read the data through debugging tool(not through 
> redboot) and found that the data written using fis 
> write in flash is actually fine. Any data in flash is 
> not being read properly through redboot. write works 
> just fine. What might be the problem. (Same code works 
> fine in the ADS board).
> > 
> > Try setting CYGSEM_IO_FLASH_READ_INDIRECT
> 
> Also, try turning off data caching on the FLASH device.
> 
Thanks for the suggestion. When I looked at the data cache code, I came across the configuration registers (WEIM)   for the chipselect which connects nor flash in hal_platform_setup.h. Changing the configuration register values to those which worked when testing the flash separately, solved it. Now the redboot works fine. Thanks again Gary and Andrew.

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