[ECOS] Atmel EB40A eval board SRAM confusion

[Kjell Svensson]

Hi Tim,

I don't have an EB40A here at the moment, but when I used those about a 
half year ago, they certainly did have their external SRAMs mapped 
starting from 0x02000000.
Anyway, I'd first suggest that You should check in the EBI-regs of the 
AT91, to see what base address the SRAMs are mapped at.

And, yes - You should definitely feel lucky if You have been able to get 
Your hands on the EB40A model, 1meg is definitely more useful than the 
ordinary 256k ;-)

Cheers, /Kjell
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Kjell Svensson                 Embedded Technology Manager
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Tim Drury wrote:
> I just got an EB40A (not EB40) board.  According to the docs the onboard 
> SRAM is not there by default from the factory - only footprints in which to
> add your own.  However, mine has two Alliance AS7C34096 (512Kx8) srams
> on board.  Lucky?  Not sure sure.  They are supposedly mapped to
> 0x02000000, but gdb gives "RDI_read: data abort, no memory at specified
> address?" error.  
> 
> I did a sanity check with gdb to be sure it was working and was able to 
> read/write to the PIO registers to turn the LEDs on and off.  Obviously
> the eCOS EB40 target.ld _should_ work since it is trying to load the
> image at 0x02000000 but I get an RDI_write error when I initially load
> an image.  I'm using Angel right now, I haven't attempted RedBoot yet.
> 
> I've emailed Atmel asking about the SRAM, but I was wondering if anyone
> else on the list has the EB40A and has working SRAM on board.  Is there
> anything else I can try to get access to the SRAM?  Has anyone with the
> EB40 had same or similar problems?
> 
> -tim
> 
> 





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