Re: gEDA-user: wishful UI

[Dietmar Schmunkamp <dietmar@xxxxxxxxxxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Am 13.08.2010 23:23, schrieb Stefan Salewski:
> On Mon, 2010-08-09 at 10:59 -0600, John Doty wrote:
>>  Remember, "pcb" isn't the only layout path we support.
>>
> 
> Yes. But I think the addition of net classes will not really break
> something. Of course it will increase the code size, which is not really
> nice. And it may decrease the working speed of PCB program.
> 
> I have written a short summary of this idea:
> 
> http://ssalewski.de/gEDA-Netclass.html.en
> 
> 
> 
> 
> _______________________________________________
> geda-user mailing list
> geda-user@xxxxxxxxxxxxxx
> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> 

Stefan,

I looked at your suggestions about netclasses and I like them. What I
would like to add (and this adds complexity, too), is the notion of
differential pair (two wires should be same length, but the actual
length basically is a don't care) or busses and control signals
(industry standard SDRAM's etc where you have delay constraints of an
entire bus vs. a single control signal).
Furthermore I have a little objection towards " No chance for unskilled
people or autorouters", I agree with "unskilled people", but at least a
subset of the requirements can be translated to autorouter attributes,
e.g. impedance easily translates to geometry for a defined layer stack
(including base material, copper width ... ) while other attributes you
suggest ("short") would only be applicable to an autoplacer (or skilled
people).
I know that the target to add net classes AND to support them with
auto[route|place|...] is very challenging, but nevertheless I think that
it's worth a try/start a discusssion.

- -- 

Mit freundlichen Gruessen

Dietmar Schmunkamp
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.12 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/

iEYEARECAAYFAkxly8wACgkQn22l+QvEah1zVACfQP5orxgMpJCvjbT3bPuxJUjZ
UFYAn3//FoLemiNGwqa75SmMw4HZYn3H
=qvlC
-----END PGP SIGNATURE-----


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user