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Re: [avr-libc-dev] FAQ addition?

From: E. Weddington
Subject: Re: [avr-libc-dev] FAQ addition?
Date: Mon, 25 Nov 2002 11:45:18 -0700

On 25 Nov 2002 at 10:34, Theodore A. Roth wrote:

> On Mon, 25 Nov 2002, E. Weddington wrote:
> :) I've seen this question floating around a lot and I don't have a
> good :) answer for it because I don't use it: :) :) How do you setup a
> project to use external RAM? :) :) I was wondering if someone else
> knew a good answer and would be :) willing to contribute to the FAQ.
> It actually rather trivial:
>     MCUCR = _BV (SRE);          /* Enable External SRAM/XMEM */
> The only gotcha is that you need to set it up early on in the startup
> procedure.

Would one have to put it in an init section?

And so one does not have to monkey around with link scripts and such 
to add external RAM support?
> One example would be wanting to put the stack in xmem (although is
> suboptimal performance wise). You would need to enable xmem before
> setting up the stack pointer (SP).

And would one have to manually set up the stack pointer? How is that 

> Any other examples?
> I'll write something up for this later today.


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