Re: gEDA-user: gnucap - oscillator example

[al davis <ad151@xxxxxxxxxxxxxxxx>]

On Monday 07 July 2008, Paul Tan wrote:
> if you already have a Gschem schematic ready, that will
> save me some time.  Do you use spice-sdb gnetlist to
> generate your netlist or do you use gnucap gnetlist ?

No.  I typed it in with a text editor.  Gnucap lets you type it 
in directly if you want, but I usually like to start with an 
editor.

Gnetlist, spice-sdb doesn't always do a complete translation.  
It only supports a subset, and only goes one way.  Netlist 
translation is an area in big need of work.  If you really want 
to make a big contribution, this is the place.

The spice format has problems.  The only reason to keep it is 
for backward compatibility with legacy tools.

I would really like it if someone would make a gschem plugin and 
PCB plugin for the gnucap translator system.  That would enable 
back-annotation and post-layout simulation, which we don't have 
yet.  I might end up doing it myself, but I think it is better 
to get more people involved so I can concentrate on making 
gnucap better in general.

> Once a generic Gschem/Gnucap Tools script submenu
> is made, it could be apply to most Gschem/Gnucap flow
> situation. Then all we have to populate are the
> examples folders and a README file to explain
> to the users the flow.

I prefer to interact with the simulator directly.  Most people 
who interact through menus or only the schematic are light 
users.

In general, I prefer direct interaction with the tools, not 
through anything that hides the real interface.  This means the 
real interface must be good, which often it isn't.

> It would save me time if you already have in
> mind certain tools flow in shell script form,even if
> it is specific to an example.

When I make gnucap examples, the intent is to demonstrate 
gnucap, and to minimize requirements of other stuff.  I will 
bring in other stuff to demonstrate the interaction.  There is 
a requirement with gnu tools to not promote any non-free 
software.  I agree with this requirement.  Any official gnucap 
documentation will only promote free tools.  Of course, gschem, 
PCB, and others here all qualify.

On the geda site, there should be examples demonstrating the 
interaction of the tools ..  gnucap and gschem working 
together.  It shouldn't just be my preference, but it should 
show the many ways the tools can be used together.




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