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Message-ID: <1382902615.28349.5.camel@pcjc2lap>
Subject: Re: [geda-user] Power to ICs with numslots > 1
From: Peter Clifton <pcjc2 AT cam DOT ac DOT uk>
To: geda-user AT delorie DOT com
Date: Sun, 27 Oct 2013 19:36:55 +0000
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On Sun, 2013-10-27 at 23:36 +0430, James Jackson wrote:
> Thank you for your reply. I have found a 'cludge' solution - if I give
> all my subcircuits the same refdes, then all the merging happens
> correctly. Seems a pretty dirty way of doing it, though...
> 
> 
> The hierarchy really just allows me to have one master schematic from
> which I can move around all others in the design easily. The circuit
> is a stereo audio application, so each circuit (of which there are
> six) will be used at most twice, and I don't have many signals moving
> between subcircuits (five at most).


I that case, try removing the sub-circuit names entirely. (Remove the
"refdes=X?" attribute from your instances, it should give you the
navigation you want without the X1/... prefix to everything.

> I think my options are boiling down to:
> 
> 
> 1. Keep the hierarchy, with the cludgy subcircuit naming described
> above
> 2. Keep the hierarchy, but route power signals explicitly to each
> subcircuit
> 3. Get rid of the hierarchy, and pass multiple schematic names to
> gsch2pcb


1 is possible, but might bite you in the longer term.
2 is normal for hierarchy.
3 is normal for flat schematics.

For 1, assuming you are not using hierarchy to multiply instantiate the
same schematic - rather, using it to help navigating an otherwise flat
schematic, try this:

In your project folder, create a file called "gnetlistrc" (or perhaps
"gafrc", depending on your exact version of gEDA?), in this place:


; Controls if net names are mangled to make them uniq when traversing 
; down into the hierarchy.  If this is disabled then the net names are not 
; changed and it is the user's responsibility to make sure they are unique.
; If you disable this, you really are taking your netlist's life into your
; own hands.  This basically has the effect of making all same named nets
; in the entire hierarchy be electrically connected.  Hope you know what you
; are doing.
;
(hierarchy-netname-mangle "disabled")


There is also the option:


; hierarchy-uref-mangle string
;
; Controls if uref names are mangled to make them uniq when traversing 
; down into the hierarchy.  If this is disabled then urefs are not changed
; and it is the user's responsibility to make sure they are unique.
; If you disable this, you really are taking your netlist's life into your
; own hands.  You *MUST* have unique urefs throughout the entire hierarchy
; or bad things might happen.  Also you cannot reuse underlying schematics.
;
(hierarchy-uref-mangle "enabled")
;(hierarchy-uref-mangle "disabled")


But I'd recommend trying removing the refdes= from your sub-circuit
instantiation first, as if that works, it saves breaking the hierarchy
system completely.


Peter


-- 
Peter Clifton <peter DOT clifton AT clifton-electronics DOT co DOT uk>

Clifton Electronics