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From: karl AT aspodata DOT se
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] why pinnumber in sym pins?
In-reply-to: <20180106171455.2518ffeb48c5079339697e0b@gmail.com>
References: <20171226122009 DOT 366BF804CEDE AT turkos DOT aspodata DOT se> <alpine DOT DEB DOT 2 DOT 20 DOT 1801022021340 DOT 14184 AT nimbus> <20180106155314 DOT 38132804CECC AT turkos DOT aspodata DOT se> <20180106171455 DOT 2518ffeb48c5079339697e0b AT gmail DOT com>
Comments: In-reply-to "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
   message dated "Sat, 06 Jan 2018 17:14:55 +0100."
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Date: Sat,  6 Jan 2018 17:52:42 +0100 (CET)
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Niklas:
> > Ok, I get it and done some testing in http://turkos.aspodata.se/tmp/gEDA/pinnumber/
> > 
> > So, in a sym file (dcdc_isol.sym), a:
> > 
> > P 300 200 0 200 1 0 1
> > {
> > T 275 225 5 6 1 1 0 6 1
> > pinnumber=-Vin
> > }
> > 
> > gives the correct net:
> > 
> > $ fgrep -e -Vin test.net 
> > 0V      U1--Vin X1-1 U2--Vin 
> > $
> > 
> > where U1--Vin is matched by pcb to the second "-Vin" (the pins "number")
> > in the fp:
> > 
> >   Pin [   0.000mm   0.000mm    2.000mm   0.500mm   2.400mm   1.000mm "-Vin" "-Vin" "" ]
> > 
> > giving me the correct ratsnet in test.pcb.
> > 
> > ///
> > 
> > That implies that I potentially need two fp for the same thing:
> > , one with numbers, if I use numbers in the sym file
> 
> I think the pinseq attribute is used to map to footprint pin?

Try to read through Rolands message:

 http://www.delorie.com/archives/browse.cgi?p=geda-user/2018/01/02/14:32:46

and come back and tell us what you don't understand.

You can also try the testcase I gave a link to above.

> > . one with names, if I use names in the sym file
> 
> To use labels on pins in footprint might be a solution to the mapping problem.

Labels are nice for us humans to be able to read instead of plain 
numbers, i.e. for the mapping between the schematic and my brain.

> Mapping is the only hard thing with schematic symbols otherwise it
> is simple regardless of type: electric circuit, hydraulic circuit,
> simulink/xcos style blocks, ...

Mapping is only hard if you don't understand how (in this case) gschem 
and pcb handles it.

Regards,
/Karl Hammar

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