Re: gEDA-user: gnetlist and hierarchy

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

Oliver,

I do have a non-standard netlister designed specifically for
hierarchical designs (especially for using buses to connect symbols
together). I have done designs which have used multiple instances of
hierarchical symbols.

But I am still not sure what your question is. Could you post or send me
an example design? Along with comments about what your desired behavior
is?

Steve Meier 


On Sun, 2008-12-07 at 02:26 +0100, Oliver Florian wrote:
> Hi everybody,
> 
> I'm currently working on a netlister backend and I am desperately 
> looking for a solution regarding a problem with hierarchical structure:
> 
> Problem:
> Within my scheme backend, I'd like to get the "virtual" component 
> representing the sub sheet (the one with the "source" attribute set), 
> more precisely it's about the attributes of that subsheet component, but 
> without disabling the hierarchy traversal.
> As you might know, the netlister gets all components in a flat 
> structure, with a reference to the hierarchical structure merely present 
> in the package and net names.
> 
> Details:
> There are two reasons for all this:
> First, I generically need to set attributes that apply tho the whole sub 
> sheet.
> And second, I need to be able to use sub sheets multiple times inside 
> the higher level schematic, but inside my netlist-file there is 
> declarative code which is required exactly once for each sub sheet, no 
> matter how many instantiations of it exist. Obviously, solving the more 
> generic problem would solve this one as well, since I could simply check 
> for matching "source" attributes to detect different instantiations of 
> the same sub sheet.
> 
> Does anyone know how to accomplish this (if possible at all)?
> Or does anyone have a non-stantdard version of the netlister that could 
> be of help in this regard?
> 
> I am aware of the gnetlistrc option hierarchy_traversal, the problem is 
> I need both the hierarchy traversal _and_ getting a hold of the subsheet 
> symbols.
> All I read so far seems to mean there is no way to do that (although I 
> haven't found a discussion on the very same problem, so far).
> 
> Any help would be greatly appreciated, thanks for your attention so far.
> 
> Oliver
> 
> 
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