Re: gEDA: Hierarchy in gschem and pcb

[Svenn Are Bjerkem <svenn-at-NOSPAMbjerkem_dot_de>]

On Tuesday 09 May 2006 07:37, al davis wrote:
> On Saturday 06 May 2006 23:14, Dan McMahill wrote:
> > I would really like to see true hierarchical support added to
> > gnetlist. For driving spice or gnucap simulations thats
> > really the right way to do it.
>
> It makes a big difference to gnucap, and it will become more
> important in the future.  Spice flattens it anyway, so it
> doesn't really matter.

Do you have any papers on hierarchical analog simulation and how it is done?

> The biggest deficiency in gnetlist is that it doesn't properly
> translate all symbols.  There should be some default rule that
> defines how unknown symbols are translated.  Something like
> everything is a subcircuit (type "X") might be appropriate.  I
> guess this is another reason why the Spice format must go away.

You mean from gnetlist or from the EDA world as such?

>
> Then hierarchy can work by defining some ".subckt", which could
> be in a separate file.  Cat the files, or use .include and
> there's the complete circuit.

Maybe it is time to see if gnucap can get a native tag in xcircuit.

-- 
Svenn