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Subject: Re: [geda-user] Silkscreened component values, mailing list, and gEDA development
Date: Mon, 4 Aug 2014 08:36:18 -0400
References: <alpine DOT LNX DOT 2 DOT 02 DOT 1406291518550 DOT 30669 AT localhost DOT localdomain> <1404129760 DOT 16971 DOT 8 DOT camel AT pcjc2lap> <4F3EB7F5-6600-4ED1-9DD0-9333AED9CC9A AT noqsi DOT com> <20140804103927 DOT GF24580 AT localhost DOT localdomain> <alpine DOT BSF DOT 2 DOT 00 DOT 1408040741380 DOT 227 AT earl-grey DOT cloud9 DOT net>
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On Aug 4, 2014, at 7:48 AM, Stuart Brorson <sdb AT cloud9 DOT net> wrote:

> Hi --
>=20
>>> Many symbol creators don?t seem to
>>> understand pinseq.
>>=20
>> For SPICE, I'm thinking of using a unique attribute, say "pinnode". =
So we
>> could part the two workflows - simulation in SPICE and making pcb's.
>> I believe that in general every particular workflow should lean on =
its
>> own attributes in gEDA/gaf.
>=20
> Overloading pinseq for use with spice-sdb seems to have caused a lot
> more grief than I could have imagined at the time.  I think the idea
> of separating the workflows makes sense.  Moreover, eliminating the
> overload would be a good thing.  I would do it be modifying spice-sdb
> to use a different atribute, for example pinnode, as you say.  Or
> spicepin, or something like that.

See https://github.com/noqsi/gnet-spice-noqsi. Its spice-prototype =
attribute is very flexible. It controls refdes munging, connections, =
parameters, etc. Connections can be ordered by pinseq or in arbitrary =
order by pinnumber (much handier for slotted components). If you turn =
off gnetlist=92s hierarchy expansion, spice-noqsi can turn hierarchical =
blocks developed for layout into SPICE subcircuits, and interpret the =
corresponding symbols correctly. Here=92s an example of a =93test =
fixture=94 for a subcircuit. The symbol and the underlying source =
schematic (which, unfortunately, I cannot publish) don=92t change *at =
all* when I use them in a printed circuit netlist flow.


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Noqsi Aerospace, Ltd.
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2822 South Nova Road, Pine, Colorado, USA 80470
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+1-303-816-2756    jpd AT noqsi DOT com
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pinseq=9
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>=20
> The only question is, how many legacy schematics would you break?

If no spice-prototype is given, spice-noqsi chooses a default based on =
device. The defaults imitate the corresponding code blobs in spice-sdb. =
The result is that my legacy spice-sdb schematics work fine.

> IMO, I don't think that many folks keep gEDA simulations going for
> years and years.  And those who do are very clueful and will know how
> to fix their spice schematics using grep and other tools.  Therefore,
> breaking legacy work is probably not a show stopper.
>=20
> I say, go for it.
>=20
> Stuart
> Original spice-sdb developer.
>=20

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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