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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>
In-Reply-To: <20151019012429.9a5cc11d1e725a11d8add299@gmail.com>
Date: Sun, 18 Oct 2015 17:43:51 -0600
Message-Id: <9815DCAD-3940-49C4-A783-79B6891C492D@noqsi.com>
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On Oct 18, 2015, at 5:24 PM, Nicklas Karlsson =
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] =
<geda-user AT delorie DOT com> wrote:

>> On Oct 18, 2015, at 4:38 PM, Nicklas Karlsson =
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] =
<geda-user AT delorie DOT com> wrote:
>>=20
>>>>> In my opinion, geda-gaf must remain neutral with respect to the
>>>>> specifics of the downstream flow.
>>>>=20
>>>> If we added a tool that sat between gschem and <downstream> that
>>>> "heavified" symbols, would that tool be part of geda-gaf and thus =
have
>>>> to be neutral about <downstream>, or would that tool not be, and =
thus
>>>> something geda-gaf would have to be neutral about?
>>>=20
>>> It depends on if there need to be feedback. I guess manufacturer =
part number do not need feed back. Revision number from for example =
subversion or other would however be useful. Pin numbers?
>>>=20
>>=20
>> Feedback is perfectly reasonable if done in a tool-neutral way. For =
manual topology feedback from Osmond PCB, I have a script that compares =
the gnetlist output with the Osmond as-built netlist. If we defined a =
format for importing this data into geda-gaf, each downstream flow could =
provide such a script.
>>=20
>> One geda-gaf issue is that the fundamental pin ID is =
refdes/pinnumber, confused a bit by slotting. That would be very hard to =
change, but I think mapping (original refdes)/(original pinnumber) to =
(as-built refdes)/(as-built pinnumber) is possible.
>>=20
>> John Doty              Noqsi Aerospace, Ltd.
>> http://www.noqsi.com/
>> jpd AT noqsi DOT com
>=20
> Gnetlist can generate a netlist from a *.sch file. A tool running the =
other direction from netlist to gschem should also be posibble, this =
tool can also do the pin mapping if this is a suitable method to solve =
the problem. If there are no synchronization problem to update the *.sch =
file while it is open in gschem this could be a suitable method.

If you want to work backward. But for me, it makes more sense to work =
forward: (ideal schematic)->(layout)->(as-built schematic).

>=20
> Nicklas Karlsson
>=20

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



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