Subject: Re: does this fit in a 22V10 gal?
Date: Thu, 26 Sep 2002 01:26:00 +0100
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"Frank Bemelman" wrote in message
> "markp" schreef in bericht
> > "Frank Bemelman" wrote in message
> > news:email@example.com...
> > >
> > > "markp" schreef in bericht
> > > news:aml39j$6qui0$1@ID-100912.news.dfncis.de...
> > > >
> > > > >
> > > > > Thanks for that, Mark. Saves me a bit of work ;) I still use some
> > > > > sort of old palasm to program my galchips, so the final equations
> > > > > are very helpful.
> > > > >
> > > >
> > > > You're welcome Frank. Palasm eh? That's going back a bit! I would
> > > recommend
> > > > getting the Lattice software though as it's free and easy to use,
> > > > you've got all those isp devices to target! Anyway, best of luck
> > your
> > > > project.
> > >
> > > I made my 22V10 today, but changed it to sub 1, so that giving adress
> > > to the first module selects the 2nd, giving a 2 selects the 3rd and
> > > so on. A bit more intuitive that way. I also changed my pcb-layout,
> > > removed the 5 adress-jumpers I initially planned to use for selection.
> > > I tested the 22V10, and it behaves as expected. I'll think I'm ready
> > > to order my first set of prototypes now - but usually I wait a week
> > > to see if some other bright idea pops up, while not thinking about it
> > >
> > Makes sense! Are you going to give us more of a clue as to what this kit
> > does (contract confidentiality permitting..)? Just curious!
> It's a machine to count an *exact* number of seeds, size ranges from
> diameter to perhaps 10-15mm. It consists of 12-96 channels, seeds fall
> them, are counted, and catched by a shutter if the count > requested
> Each channel counts ~20 seeds per second, so 1000 seeds can be counted in
> less than one second, permitting some time for the batch to leave the
> shutters to be reopened etc. Every 4 channels are controlled by one board,
> each board has a little uP with adc etc, the GAL for the adressing,
> for the shutters etc. There are 24 boards maximum, although I could use 32
> boards. We already have similar systems, but these have a tremendous
> of cabling, something I want to make a bit more efficient. Should save
> put everything together. BTW, not all channels have shutters, depending on
> configuration and desired performance.
> Why counting and not weighing? The weight is too variable, and some sorts
> of seeds cost more than gold (in weight). Since each individual seed is
> guaranteed to 'work', the exact number of seeds is packed & sold. It's
> almost like counting money.
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 on
an enhanced 8051 type uC, cheap and the design is in the public domain
allowing you to develop and create an embedded version easily.