gEDA-dev: State of the symbols library

[John Doty]

On Jul 1, 2007, at 6:41 AM, Steve Meier wrote:

> In my view,
>
> Graphical symbols are used to lable nets, such as the power and ground
> symbols.

Oh yeah, I'd forgotten about that.

> So does gnetlist ignore them? Doesn't it at least use them to
> name a net?

In the special case of a graphical with pins with net= attributes, it  
uses them. Otherwise no. Pinless graphicals are used as title blocks,  
and I use pinned graphicals as graphical "comments" sometimes, for  
example placing the symbol for a subcircuit in the subcircuit  
schematic for reference. Of course, that trick uses graphical=1 on  
the instance, not in the symbol itself.

>
> Hierarchical Symbols are a different beast.

But you've now shown how Stuart is right here: you can *also* use a  
graphical to make hierarchical connections, at least to a unique  
subcircuit. Yet another way to do hierarchy. Another example of  
gEDA's radical flexibility.

> But, I also agree with
> Stuart that the pins of the symbol have to make the connection to the
> attached schematic.

Depends on what you're trying to do. Radical flexibility...

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