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Mail Archives: geda-user/2012/08/18/14:23:37

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Date: Sat, 18 Aug 2012 22:23:19 +0400
From: Vladimir Zhbanov <vzhbanov AT gmail DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user]
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On Sat, Aug 18, 2012 at 10:29:15AM -0400, Nathan Stewart wrote:
> Apparently, the INPUT and IO components need to have a value=INPUT or
> value=IO. I also had issues with the net= attributes on my power pins
> - I had them labeled +7V and -7V, and at least -7V is not legal.  So I
> replaced them all with Vdd and Vss, even though emotionally I'm going
> 'but but but there's nothing in the circuit that says it has to be
> MOSFET!!!") and I secretly know in my heart that these represent a +/-
> 7V split rail supply.
> 
> When I did fix the pin/subcircuits, the IO tags hooked up to the
> subcircuit symbols also lacked the value=IO, and this appears to have
> prevented the S1/PIN substitution in a way that confused me.  My schem
> _appears_ to be all good now.

To throw away all doubts you can see the gEDA gTAG example from the gEDA
distribution. It contains all you need to make schematics with
subcircuits. The simple 'grep' shows that its schematics have neither
'value=INPUT' nor 'value=IO' attributes. There is 'device=INPUT' there.
OTOH, I see that io-1.sym in the distribution does contain 'value=IO',
and input-2.sym contains 'value=INPUT' (while input-1.sym contains
'device=INPUT'). However, these symbols are not used in gTAG (this
project uses in-1.sym, out-1.sym with "device=..." attributes).
There are an example how to label your pins there. You probably can name
them something like 7V+ and 7V-. AFAIK, the attribute value cannot begin
with a dash.

-- 
VZh
http://vzhbanov.byethost33.com

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