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Mail Archives: geda-user/2015/09/09/14:09:12

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Date: Wed, 9 Sep 2015 14:09:05 -0400
Message-Id: <201509091809.t89I95SI022282@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: geda-user AT delorie DOT com
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(geda-user AT delorie DOT com)
Subject: Re: [geda-user] New experimental netlist features
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> Would this proposed feature also work for connecting a single pin to
> multiple pads? For example, could three pin symbols for transistors
> work with devices that have four pads? It would be nice to support
> all the relationships:

In my blue-sky world, this problem is handled by the pin-mapping idea:

http://www.delorie.com/pcb/pin-mapping.html

Combining the two, you'd have gschem see this:

  netname="CS7,nWR,D[15:8]"
  pinlabel="nCS,nWRITE,Data[7:0]"

And the selection of a component would provide a pin mapping:

  nCS = 1
  nWRITE = 2
  (D7,D6,D5,D4,D3,D2,D1,D0) = (3,4,5,6,7,8,9,10)
      (maybe it's a ram chip and the order of data pins doesn't matter)

For transistors you might end up with a mapping like:

  G = 1
  S = 2
  D = 3,4

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