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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: <20151025192608.afc58478b5e9e3a59378ba30@gmail.com>
Date: Mon, 26 Oct 2015 12:29:19 -0400
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On Oct 25, 2015, at 2:26 PM, Nicklas Karlsson =
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] =
<geda-user AT delorie DOT com> wrote:

> Then i used gschem today on a hierarchical design today I was thinking =
why do there need to be numbers on pins in schematic at all? Another =
work flow be to add the numbers by gnetlist there may still be numbers =
in special cases then there is a need to distinguish pins with same =
name. Purpose of netlister then doing layout is to assign footprint pin =
number but then doing simulation there is no need to assign footprint =
pin number.

Gnetlist mainly navigates the design via refdes, pinnumber, and netname. =
It can=92t function properly unless the user provides refdes and =
pinnumber. However, if the user doesn=92t provide netname, it just =
assigns one. It seems to me that the approach would be more consistent =
if gnetlist also assigned unique refdes and pinnumber values if those =
are missing.

Providing sensible defaults for missing data would be generally useful. =
There are, for example, symbols like spice-options-1 that need a refdes =
as a handle, but the actual value of the refdes does not matter. Having =
the user provide the refdes is just an unnecessary complication. It can =
cause confusion in case of a duplicate. Another place where a lack of =
default is clumsy and ugly is in the net=3D attribute. Couldn=92t the =
pin default to =931=94?

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



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