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Re: gEDA-user: Power rail net clarification
Hi Nikos,
I am new to gEDA(working on my first project for some months so far)
and had similar doubts(solved) some time ago.
On Sat, 2010-06-19 at 08:42 -0600, Nikos Arechiga wrote:
> Hello,
> I just want to make sure I understand this correctly. When I
> instantiate a power rail, there is an inherited attribute called "net"
> with a default value of VCC:1, which I cannot change.
This inherited attribute gets promoted to the schematic when you add the
symbol, and you can edit it to your needs.
> My understanding
> is that if I add my own net attribute, say net=VCC:3V
> Is this correct?
I see a misunderstanding here. I had the same error at the beggining.
The net attribute has the syntax: NET_NAME:PIN_NUMBER_ASSOCIATED.
So, in net=Vcc:1, NET_NAME = Vcc and PIN_NUMBER_ASSOCIATED = 1.
The correct way would be something like net=VCC3V:1.
Note the ":" character has a special meaning in net attributes, so you
cannot use it as part of the identification of the net.
Best Regards, Felipe.
PS: Since I made the mistake on lot of nets before realizing the error
and found unnecessary to explicitly write the pinnumber associated with
a net in symbols with only one pin, I made a patch for gnetlist to
assume an implicit ":1" suffix on nets with names lacking the pinnumber
part(so you can have net=VCC3V instead of net=VCC3V:1) but you will have
to apply the patch to your local copy of the code and recompile gnetlist
if you want to try it out.
--
Felipe De la Puente Christen
Mobile Phone : +56 9 93199807
MSN/GTalk : fdelapuente@xxxxxxxxx
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