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Re: gEDA-user: Problems with subnets containing short-circuits

send me your test1.sym and I will run it for you.

Steve Meier

On Thu, 2006-07-20 at 18:43 +0200, Arvid RosÃn wrote:
> Ok. I am not sure what that means as I am not familiar with the PCB backend.
> What happens if you run in on the top-level file (top.sch), which 
> includes test.sch as a subnet?
> 
> /Arvid
> 
> Steve Meier skrev:
> > 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
> >> 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
> >   
> 
> 
> 
> _______________________________________________
> geda-user mailing list
> geda-user@xxxxxxxxxxxxxx
> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user



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