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Subject: Re: [geda-user] Gnucap and Google summer of code
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From: John Doty <jpd AT noqsi DOT com>
In-Reply-To: <20160301152419.49903618@floyd.freeelectron.net>
Date: Tue, 1 Mar 2016 13:46:51 -0700
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References: <20160229155407 DOT 5f14a970 AT floyd DOT freeelectron DOT net> <FB047616-EDA8-4208-8F84-C9576E8D2569 AT noqsi DOT com> <20160229211820 DOT 623549f9 AT floyd DOT freeelectron DOT net> <alpine DOT DEB DOT 2 DOT 11 DOT 1603011200390 DOT 1874 AT nimbus> <20160301095333 DOT 1cee2433 AT floyd DOT freeelectron DOT net> <B28EE0BF-7878-4582-9581-5B3B9FB18372 AT noqsi DOT com> <20160301152419 DOT 49903618 AT floyd DOT freeelectron DOT net>
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On Mar 1, 2016, at 1:24 PM, al davis <ad252 AT freeelectron DOT net> wrote:

>=20
>>> Import, back-annotation.
>>=20
>> They are exporters. These things are not their province.
>=20
> That's the reason for this new project.
>=20
>>> Support for all symbols.
>>=20
>> What do you mean by that?
>=20
> All of the gnetlist spice netlisters contain a list of symbols that =
are
> explicitly translated, one at a time.  This is a fundamental shortfall
> of the design.  You have many times pointed out flaws in PCB where the
> design prevented what you consider to be sufficient generality.  Now
> here the design is much more limited.

Actually, gnet-spice-noqsi is fully extensible. It has a short builtin =
list of common devices it thinks it understands (basically the list from =
gnet-spice-sdb), but the user can, with a spice-prototype attribute, =
tell it what to do for any symbol.

>=20
>>> Looking beyond that, all that plus:
>>>=20
>>> Verilog, VHDL completeness.
>>>=20
>>> To/from other schematic formats (Kicad, Qucs).
>>=20
>=20
>> Difficult. For flat netlists, there is a common understanding of what
>> the underlying abstraction is. The problem is mostly encoding (with a
>> few oddities like instance parameters in SPICE). For schematics,
>> there is no such general understanding.
>=20
> Yes it is difficult.  The Gnucap project has a plan for this, with a
> different underlying abstraction.
> This underlying abstraction is well defined and much of the code for
> the general case is already written.  We are looking for help to write
> translation plugins for some specific targets, in and out of the
> system, and inviting students to apply under Google Summer of Code.
>=20

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



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