[ECOS] at91-mec

[Scott Dattalo]

The AT91-MEC is the "Atmel Memory Expansion Card". This PCB contains 2Meg
bytes of SRAM and 3 Meg Bytes of Flash and plugs into the expansion slot 
of the EB40 and EB40a Atmel evaluation boards.

The question is this:

Has anyone else experimented with one of these? If so would you be willing 
to share your results?

Using gdb, I've manually manipulated the EBI registers at address 
0xffe00000 and enabled the chip selects to the SRAM's. Even though the 
SRAMs are not 16Meg bytes, I wrote 0x3002535 to 0xffe00014 and was then 
able to manipulate RAM at address 0x3000000. Cool!

My main interest however is the Flash. I'm in the Flash evaluation phase
of my project and I'd like to use the MEC as a platform for testing.  
I'll be removing the Atmel supplied chips and trying 1) bigger Atmel Flash
and 2) AMD Flash.

Now, I'm not asking for any kind of free lunch here. What I'd like to do 
is build upon something that already exists. If no one has written code 
for the at91mec, then I have no problem hacking my own.

BTW, Thomas K. coincidently is proposing a new flash driver mechanism to 
accomodate oddly sized sectored flash. Thomas, I'll be willing to work 
with you on this and provide support for the devices I intend to test.

Scott


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