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Re: [avr-gcc-list] Atmel EIT

From: Hugo Villeneuve
Subject: Re: [avr-gcc-list] Atmel EIT
Date: Sat, 04 Jun 2005 09:56:33 -0400

> >     I recently purchased the EIT (Embedded Internet 
> > Toolkit) from Atmel. I 
> > have modified the source code so that it compiles under 
> > avr-gcc. But I 
> > have problems accessing the CS8900A Ethernet Controller and I cannot 
> > read the ID register of that chip. Does anybody have experience with 
> > this board and avr-gcc?
> I recently had some experience of CS8900A with Hitachi SH3 processor. I
> was only involved with the hardware bit, but I think the problem you are
> having might not have anything to do with avr-gcc. Make sure the reset
> is done properly and remember the Reset line of the chip is active high.
> Then the next thing you might try is the timing for Write and Read.
> There is a Technical Reference Manual and FAQ at Cirrus Logic web site
> that could be helpful.


        The problem was that the SRE bit in MCUCR was not set in the Atmel 
source code, so the external memory interface was not enabled. Now I can read 
the ID register correctly.


> Eric Fu
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