Re: gEDA-user: Subnets

[Larry Doolittle <ldoolitt@xxxxxxxxxxxxxxx>]

On Mon, Aug 16, 2010 at 07:32:23PM +0200, Stephan Boettcher wrote:
> I usually have hierarchical schematics with multiple instances of the
> same subcircuits referenced from the main page.  The deepest until now
> were three layers of hierarchy.

I make do with two, but that's how I work also.

> All the cutting, sed-ing and pasting of the subcircuits to multiple
> instances, with replication of later changes on all copies is pretty
> unflexible.

Agree 100%.

> Hierarchical sub-cells (like with ASIC layouts) would allow to make and
> maintain such circuits much easier.
> 
> What I am asking for here is, when you now talk about layout
> zones/partitions/whatever it's called in the end, please consider the
> application of the concept for this kind of hierarchy.  Maybe the new
> concepts can be easily applied for that as well, with a little vision
> into that direction.
> 
> Maybe it is trivial to allow multiple copies of a layout zone on a
> board, with a common netname/refdes prefix substituted on the copies.
> When you edit the layout of any copy, all instances follow the change.

I don't know about the "trivial" adjective, but I assert that's the goal,
and would give me (and I suspect many others) a dramatic improvement in
productivity and usability.  The old "get an electic circular saw after
years of only using a hand saw" analogy.

> My eagle-using colleagues envy me for the hierarchical schematics that I
> can draw in gschem.

I do this in xcircuit, but at some point I may move to gschem.
My biggest motivation, believe it or not, will be the better BOM support.

   - Larry


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