From: Chuck Simmons
Organization: You jest.
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Subject: Re: Basic Stamp vs Pic processors
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Date: Tue, 08 Oct 2002 12:27:22 GMT
NNTP-Posting-Date: Tue, 08 Oct 2002 05:27:22 PDT
Dave VanHorn wrote:
> > Interesting. I don't think we can change cores. Too much effort involved
> > since I know our on chip bus structure would have to change. That's
> > messy and I really don't want to go back to scratch debug again on this
> > chip. That took weeks the first time out. BTW, my "master" to "slave"
> > communication is quite easy given all of the dual port RAM.
> I almost went that way, but couldn't find a DPR that I liked.
> > The reason I have three AVRs is a performance issue. The AVR, even at
> > 40MHz clock is too slow. Even three AVRs are too slow. To make three
> > work, we put in a special arithmetic unit that all three share. That put
> > 2 of the AVRs at a constant 80% utilization and I think the master runs
> > around 50% - it is hard to measure because the load changes a lot.
> Interesting. What are you doing that's sucking up 100 AVR mips?
DVD focus, tracking, spindle, sledge and some miscellaneous stuff.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org