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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 |
| In-reply-to: | <EA4D92E5-7674-49D8-911E-1318E2F1CEF1@sbcglobal.net> |
| (geda-user AT delorie DOT com) | |
| Subject: | Re: [geda-user] New experimental netlist features |
| References: | <alpine DOT DEB DOT 2 DOT 11 DOT 1509031356150 DOT 13201 AT nimbus> <msi77b$6rr$1 AT ger DOT gmane DOT org> <alpine DOT DEB DOT 2 DOT 00 DOT 1509082036590 DOT 3066 AT lichen> <201509082040 DOT t88KerD6005455 AT envy DOT delorie DOT com> <EA4D92E5-7674-49D8-911E-1318E2F1CEF1 AT sbcglobal DOT net> |
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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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