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Re: gEDA-user: Problems with subnets containing short-circuits
When I run gnetlist -gPCB test.sch -o test.net I get
unnamed_net3 R34-2 4-1
unnamed_net2 1-1 2-1
unnamed_net1 R34-1 3-1
On Thu, 2006-07-20 at 17:28 +0200, Arvid RosÃn wrote:
> Stuart Brorson wrote:
> > I guess I don't see how shorting around a circuit involves connecting
> > two nets which don't connect to anything else. Can you post a
> > simplified version of what you are trying to do? We can look at it
> > during the code sprint.
> >
> Ok, I attached two sch-files which I think illustrates the problem quite
> well.
> I tried this with the gnet-geda backend, and it fails discover that
> Rtop1 and Rtop2 should be connected.
> > Meanwhile, why not stick a zero ohm resistor into the shorting net,
> > similar to what John suggests? That way gnetlist has a component
> > which will preserve the net.
> >
> > Stuart
> >
> Yeah, sure. This is no problem as long as you are aware of it. But I
> just spent one day looking for errors in my netlister-backend.
> I still think this is a strange behavior.
>
> /Arvid
>
>
>
>
> >
> >
> >> Stuart Brorson wrote:
> >>
> >>> Just out of curiosity, why would you want to have two nets which
> >>> connect to nothing other than each other?
> >>>
> >>> Before we label it a bug, what is the goal of this construct? =20
> >>>
> >>> Stuart
> >>> =20
> >>>
> >> Hi Stuart!
> >> That's a good question. The construct itself is quite pointless.=20
> >> However, I was working on a quite complex design with two=20
> >> filter-subcircuits. I wanted to test some aspects of my circuit, so I=20
> >> shorted the first filter just to bypass it, which resulted in an open=20
> >> circuit instead of a bypass! That is quite annoying, don't you think?
> >> The possibility to bypassing stuff is always important when debugging.
> >>
> >> Cheers
> >> Arvid
> >>
> >>> =20
> >>>
> >>>> John Luciani wrote:
> >>>> =20
> >>>>
> >>>>> On 7/20/06, Arvid Ros=3DE9n <arvid@xxxxxxxxxx> wrote:
> >>>>> =20
> >>>>>
> >>>>>> However, I also tried to make a 2-pin subnet containing only a
> >>>>>> short-circuit. This connection was completely ignored by gnetlist!!
> >>>>>>
> >>>>>> Could someone confirm this?
> >>>>>> =20
> >>>>>>
> >>>>> You are correct. If you have two nets that only connect to each other
> >>>>> the connection does not show up in the netlist.
> >>>>>
> >>>>> I get around this by connecting one of the nets to a component.
> >>>>>
> >>>>> (* jcl *)
> >>>>>
> >>>>> =20
> >>>>>
> >>>> Ok, thanks!
> >>>> Shouldn't that be considered as a pretty severe bug? I am new here,=3D=
> >>>>
> >> 20
> >>
> >>>> maybe it's already reported.
> >>>>
> >>>> /Arvid
> >>>>
> >>>> --=3D20
> >>>> Arvid Ros=3DE9n
> >>>> Softube AB
> >>>> Teknikringen 7
> >>>> S-583 30 Link=3DF6ping
> >>>> Sweden
> >>>> Phone: (+46) 13 21 16 23
> >>>> Mobile: (+46) 73 25 12 34 7
> >>>> Mail: arvid@xxxxxxxxxx
> >>>> URL: www.softube.se
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> geda-user mailing list
> >>>> geda-user@xxxxxxxxxxxxxx
> >>>> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> >>>>
> >>>> =20
> >>>>
> >>>
> >>> _______________________________________________
> >>> geda-user mailing list
> >>> geda-user@xxxxxxxxxxxxxx
> >>> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> >>> =20
> >>>
> >> --=20
> >> Arvid Ros=E9n
> >> Softube AB
> >> Teknikringen 7
> >> S-583 30 Link=F6ping
> >> Sweden
> >> Phone: (+46) 13 21 16 23
> >> Mobile: (+46) 73 25 12 34 7
> >> Mail: arvid@xxxxxxxxxx
> >> URL: www.softube.se
> >>
> >>
> >>
> >> _______________________________________________
> >> geda-user mailing list
> >> geda-user@xxxxxxxxxxxxxx
> >> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> >>
> >>
> >
> >
> >
> > _______________________________________________
> > geda-user mailing list
> > geda-user@xxxxxxxxxxxxxx
> > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> >
>
>
> plain text document attachment (test.sch)
> v 20060123 1
> C 1000 4500 1 0 0 in-1.sym
> {
> T 1000 4800 5 10 1 1 0 0 1
> refdes=3
> }
> C 4600 6100 1 180 0 in-1.sym
> {
> T 4600 5800 5 10 1 1 180 0 1
> refdes=2
> }
> C 1000 5900 1 0 0 in-1.sym
> {
> T 1000 6200 5 10 1 1 0 0 1
> refdes=1
> }
> N 1600 6000 4000 6000 4
> C 4600 4700 1 180 0 in-1.sym
> {
> T 4600 4400 5 10 1 1 180 0 1
> refdes=4
> }
> C 2300 4500 1 0 0 resistor-1.sym
> {
> T 2500 5000 5 10 1 1 0 0 1
> refdes=R34
> T 2500 4800 5 10 1 1 0 0 1
> value=10k
> }
> N 2300 4600 1600 4600 4
> N 3200 4600 4000 4600 4
> plain text document attachment (top.sch)
> v 20060123 1
> N 5000 9500 4300 9500 4
> C 5000 9200 1 0 0 test.sym
> {
> T 5400 10300 5 10 1 1 0 0 1
> refdes=Utest
> T 5400 9200 5 10 1 1 0 0 1
> device=test
> T 5000 9200 5 10 1 0 0 0 1
> source=test.sch
> }
> C 1700 8200 1 0 0 vac-1.sym
> {
> T 2400 8850 5 10 1 1 0 0 1
> refdes=Vin
> T 2400 8650 5 10 1 1 0 0 1
> value=dc 0 ac 1
> }
> C 3400 9900 1 0 0 resistor-1.sym
> {
> T 3600 10400 5 10 1 1 0 0 1
> refdes=Rtop1
> T 3600 10200 5 10 1 1 0 0 1
> value=10k
> }
> C 1900 7300 1 0 0 gnd-1.sym
> N 2000 8200 2000 7600 4
> N 2000 9400 2000 10000 4
> N 6800 9500 7600 9500 4
> N 7600 10000 6800 10000 4
> N 2000 8000 9000 8000 4
> N 9000 9100 9000 10000 4
> N 3400 10000 2000 10000 4
> N 4300 10000 5000 10000 4
> C 4300 9600 1 180 0 resistor-1.sym
> {
> T 4100 9100 5 10 1 1 180 0 1
> refdes=Rtop3
> T 4100 9300 5 10 1 1 180 0 1
> value=10k
> }
> N 3400 9500 3000 9500 4
> N 3000 9500 3000 10000 4
> C 7600 9900 1 0 0 resistor-1.sym
> {
> T 7800 10400 5 10 1 1 0 0 1
> refdes=Rtop2
> T 7800 10200 5 10 1 1 0 0 1
> value=10k
> }
> C 8500 9600 1 180 0 resistor-1.sym
> {
> T 8300 9100 5 10 1 1 180 0 1
> refdes=Rtop4
> T 8300 9300 5 10 1 1 180 0 1
> value=10k
> }
> N 9000 10000 8500 10000 4
> N 8500 9500 9000 9500 4
> C 8900 9100 1 270 0 resistor-1.sym
> {
> T 9400 8900 5 10 1 1 270 0 1
> refdes=Rload
> T 9200 8900 5 10 1 1 270 0 1
> value=10k
> }
> N 9000 8200 9000 8000 4
>
> _______________________________________________
> geda-user mailing list
> geda-user@xxxxxxxxxxxxxx
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