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Date: Mon, 19 Mar 2012 18:39:17 -0700
From: Joe Knapp <joeknapp AT keensupport DOT net>
Organization: Keen Support Services, LLC
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To: geda-user AT delorie DOT com
CC: Nathan Stewart <therealnathanstewart AT gmail DOT com>
Subject: Re: [geda-user] repetitive circuits
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Reply-To: geda-user AT delorie DOT com

Nathan,

I implemented a 3 channel RF receiver. Each instantiation of the
receiver channel gets a different Ref Des, e.g. CHA, CHB, CHC.  These
ref. designators are pre-pended onto the ref. des. of the instantiated
schematic. So, for example, U100 of my generic channel will become
CHA-U100, CHB-U100, and CHC-U100, when netlisted. Does that help?

sytem-gnetlistrc:

; 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")


On 03/19/2012 06:29 PM, Nathan Stewart wrote:
> engineering choices aside - I guess the question remains - as I have
> 2x quad switches in the same circuit, so sidestepping the assignment
> by changing parts only adds another turtle to the stack of them
> holding up the earth.
>
> On Mon, Mar 19, 2012 at 9:24 PM, Nathan Stewart
> <therealnathanstewart AT gmail DOT com> wrote:
>> Thanks - I saw the bit about hierarchical schematics but missed the
>> bit about being able to use them multiple times. What about refdes
>> incrementing and assignment? Right now I've got my filter laid out so
>> that there are 6 channels, each using 2 channels of a quad opamp.  I
>> guess it's probably better to either draw it as 3x dual channel
>> filters, or else swtich to dual opamps. I'm not really space
>> constrained, might be easier to lay out anyway.
>>
>> On Mon, Mar 19, 2012 at 7:04 PM, John Griessen <john AT ecosensory DOT com> wrote:
>>> On 03/19/2012 10:28 AM, Nathan Stewart wrote:
>>>> In gschem, Is there any way to cleanly represent repetitive circuit
>>>> segments without drawing the same circuit n times, but so that it will
>>>> still import correctly into PCB?
>>>
>>> Have you gotten along at hierarchic schematics?  There are some
>>> tools I use here:   http://www.gedasymbols.org/user/john_griessen/
>>> http://www.gedasymbols.org/user/john_griessen/tools/pcb-hier-cells
>>>
>>> I can send you an example project to look at and maybe you will use the
>>> project dir method as a model.  My project dirs include necessary config
>>> files so that
>>> gschem uses local libraries in them.

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