[ECOS] External I/O access on Adder

Gary Thomas gary@mlbassoc.com
Sat Mar 5 11:56:00 GMT 2005

On Sat, 2005-03-05 at 09:38 +0700, Sugeng Widodo wrote:
> Hi All,
> I have to access external chips with 13 bits address and 16 bits data.
> I programmed OR4 and BR4 to use CS4 with address beetwen 0xFB000000 -
> 0xFB007FFF and set the area to NOCACHE area. To do that I edited file
> Adder.S and hal_aux.c.

What were your exact changes?

> Lower half of the area is work fine , except I could not catch the CS4
> with my logic analyzer ?? But the next half always make my apps crash
> when I access it. Sometimes I could access it for 4 times and
> sometimes it's crash when I accessed it on the first time.
> Anybody have any clue on that ?

Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world

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