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Subject:	Re: [geda-user] Pin mapping (separate symbols from mappings)
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From:	John Doty <jpd AT noqsi DOT com>
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Date:	Sun, 18 Oct 2015 22:53:35 -0600
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On Oct 18, 2015, at 10:08 PM, DJ Delorie <dj AT delorie DOT com> wrote:

>=20
>> Then you're talking about a *drastic* change to geda-gaf, or a new
>> schematic toolkit entirely.
>=20
> Why?  Just because we have no way of figuring out which symbol is =
which?

Well, just looking at the gnetlist API, nearly every function uses the =
refdes to identify the =93package=94, and the pinnumber to identify the =
pin. This is both in function arguments and returned data. You can often =
leave out pinseq or pinlabel, but a pin without pinnumber is trouble.

>=20
>> But I don't see why a symbolic pin cannot have a number to identify
>> it: it need not have anything to do with the physical pin.
>=20
> I doctored those symbols to have symbolic pins, but if you instantiate
> two deafult 7400.sym's you get pin numbers - but they both have pins
> 1,2,3, so no help there.
>=20

Sure. But in an abstract flow, those numbers are not necessarily the =
physical pin numbers. Your map determines the translation. Original-U1-1 =
maps to U1-2 while original U2-1 maps to U1-5.

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



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