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To: geda-user AT delorie DOT com
cc: karl AT aspodata DOT se
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Subject: Re: [geda-user] parts of a device to different (schematic) subsheets
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References: <20120804132146 DOT 662918283EED AT turkos DOT aspodata DOT se> <jvjd9c$qdn$1 AT dough DOT gmane DOT org>
Comments: In-reply-to Kai-Martin Knaak <kmk AT familieknaak DOT de>
   message dated "Sat, 04 Aug 2012 16:57:48 +0200."
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Date: Sun,  5 Aug 2012 10:15:22 +0200 (CEST)
From: karl AT aspodata DOT se (Karl Hammar)
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Kai-Martin Knaak:
> Karl Hammar wrote:
> 
> > Does anyone know how to have a few subsheets where there is a common
> > (think MCU) device, e.g. one sheet for the power supply, one for jtag,
> > etc., but they still refer to the same device.
> 
> You'd have to make sure that all of the symbols that refer to the same 
> physical component bear the same refdes. No problem, if you disable refdes 
> mangling in gnetlistrc. But then you have to make sure manually that there 
> are no unwanted duplicate refdeses. 

That might be too much of a pain.

> Refdes mangling is supposed to make the refdeses unique by prefixing them 
> with the refdes of the subsheet. There is no actual check for uniqueness. 
> If you give all some subsheets the same refdes, the effective refdes of the 
> symbols will also be the same. This way, gnetlist can be tricked into 
> merging symbols of different sheets. Of course, you have to make sure, there 
> are no unwanted refdes conflicts.

Ok, that seem the way to goo.

> I whipped up a quick example to test this idea -- see attachment. All 
> symbols should be embedded.

Thanks, yes I can see all symbols.

> Note, I disabled net attribute mangling to make 
> power symbols work across the hierarchy without port symbols.

I see. In "opamp" you connect things via pins and subsheet port-symbols,
in "name" via non-mangled net names.

If you have non-mangled net names you seem cautious to not have any 
unnamed net within the subsheets, which seems to be a to big burden to 
be worth it.

Regards,
/Karl Hammar

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