From: "Frank Bemelman"
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com>
Subject: Re: does this fit in a 22V10 gal?
Date: Thu, 26 Sep 2002 17:48:15 +0200
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Organization: EuroNet Internet
NNTP-Posting-Date: 26 Sep 2002 15:49:27 GMT
"markp" schreef in bericht
> This sounds an interesting project! Presumably there's some kind of
> inter-communication between them or to a central controller. Have you
> considered using a multi-drop type of access RS485 or the like? This might
> even be a prime candidate for a network application e.g. TINI
> (www.ibutton.com/TINI). The latter is a Java Virtual Machine implemented
> an enhanced 8051 type uC, cheap and the design is in the public domain
> allowing you to develop and create an embedded version easily.
A central controller read/writes the 32 modules, so there are the 5
and 8 datalines. While every module controls its own 4 shutters, I need
to accumulate all counts from all modules in a few ms at most, and signal
a 'count is reached' to all modules, within a few ms, so that all modules
will start catching from that moment on. Imagine the count is 940, all
see a product at the very same time, and have a count of 4, then polling
15 modules makes my count equal to 1000, and I signal all modules to start
catching. The 15 modules just polled, have their counts cleared, will let
the still falling seeds through, and join catching the next falling ones,
together with the other 17 modules. It can even happen that a particular
module has seen 4 seeds, but only needs to catch 1 of them, and let the
other 3 go through. Too much of an adventure for RS485, with reasonable
baudrates anyway, imo.
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