Re: gEDA-user: ideeas for gschem and pcb

["Bernd Jendrissek" <bernd.jendrissek@xxxxxxxxx>]

On Tue, Jul 15, 2008 at 3:14 PM, Robas, Teodor <teodor.robas@xxxxxxxxx> wrote:
> 1. Footprint alternatives. Basicaly this is done by adding some new
> items in the .sym models:
> e.g.
> footprint_alternative1=DIP20
> footprint_alternative2=SSOP20
> .... and so on.
> And add a dropdown box in gschem when selecting footprint to select from
> one of these options (or manualy specify one).
> Of course, this feature has no use without updated libs, but still, it
> can be used in time if there is support in the application.

The pin number assignments are not always the same between the
different footprints.  Would you have a different symbol for each pin
numbering scheme per part?  I have an alternate solution in my
abstract-symbols branch, for this part of the problem, which allows
you to place an "abstract" symbol and hook it up with nets etc., and
the pins only get numbered [object notification system, for geda-dev@
readers] when you assign the abstract symbol to a concrete "part"
(also a symbol, but doesn't need any graphical sophistication - in
fact could/should live on a separate sheet without necessarily having
any visible connections).  I haven't finished the abstraction - I
still want to teach libgeda that the same piece of silicon can come in
different packages, so that you CAN have just one "part" symbol that
has ALL the footprint options.


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