Re: [ECOS] Atmel EB40A eval board SRAM confusion

[Tim Drury <tdrury at siliconmotorsports dot com>]

I feel a little stupid.  Not 10 minutes after I sent that email that I thought
about looking at the EBI registers (it has been over 2 years since I've done
embedded work and I feel I've forgotten everything).  And, sure enough,
the CS1 config register was not setup for the SRAM.  For those that find
themselves in a similar situation, I put 0x02002001 in that register and got
the SRAM up.  I'm not sure about the wait states (all off) but it is 10ns SRAM
and appears to be reading/writing.

I haven't gotten "hello world" running yet as I ran out of time last night,
but the code image did appear to get into the SRAM.  I set a breakpoint
on the printf() and when I ran the code there appeared to be no error
messages in the gdb console, but it claimed "RDI_setbreak: no more
break/watch points available".  I look into this one more today.

Thanks for the help,

-tim


On Saturday 08 June 2002 05:09 am, Kjell Svensson wrote:
> 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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