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| Tue, 10 Jul 2018 13:54:10 -0700 (PDT) | |
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| From: | "Chad Parker (parker DOT charles AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> |
| Date: | Tue, 10 Jul 2018 16:54:10 -0400 |
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| Subject: | Re: [geda-user] shorted pads and the netlist in PCB |
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--000000000000f9a8fc0570ab5426 Content-Type: text/plain; charset="UTF-8" The only way that pcb can know your intent for that pin is for you to tell it, in one way or another. So, if you're not going to use a symbol in gschem that has that pin, then you're going to have to explicitly tell pcb what you want, somehow. One way to do this is to edit the netlist and manually to add the pin in question. If there's another ground pin on the package, I believe you can assign the same pin number to both footprint pads, and then the existing netlist doesn't have to be altered. This method does require you to edit the footprint. You can also manually draw the ground net yourself by selecting the "rat lines" layer and using the line tool to connect the extra pin to something with the desired net. The netlist is saved in the pcb file, however, it is not saved to the external netlist file generated from the schematic. So, if you choose this method, and you have to later make schematic changes that require you to reload the netlist, the change will not persist. Do any of these options solve your problem? Thanks, --Chad On Tue, Jul 10, 2018 at 4:00 PM, Marvin Dickens (mpdickens AT gmail DOT com) [via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote: > Well, I am not a unicorn... > > This bug has been around for over a *decade* and has been one of the deal > breakers for us. > A solid net list is required when bringing up non-trivial boards for the > first time and later during DUT > after engineering changes / repair. > > Unless you are a one man shop, a defective net list that has to be > massaged in order to be > reliable will always suspect. > > > Regards > > Marvin > --000000000000f9a8fc0570ab5426 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>The only way that pcb can know your intent for that p= in is for you to tell it, in one way or another. So, if you're not goin= g to use a symbol in gschem that has that pin, then you're going to hav= e to explicitly tell pcb what you want, somehow.</div><div><br></div><div>O= ne way to do this is to edit the netlist and manually to add the pin in que= stion.<br></div><div><br></div><div>If there's another ground pin on th= e package, I believe you can assign the same pin number to both footprint p= ads, and then the existing netlist doesn't have to be altered. This met= hod does require you to edit the footprint.<br></div><div><br></div><div>Yo= u can also manually draw the ground net yourself by selecting the "rat= lines" layer and using the line tool to connect the extra pin to some= thing with the desired net. The netlist is saved in the pcb file, however, = it is not saved to the external netlist file generated from the schematic. = So, if you choose this method, and you have to later make schematic changes= that require you to reload the netlist, the change will not persist.<br></= div><div><br></div><div>Do any of these options solve your problem?<br></di= v><div><br></div><div>Thanks,</div><div>--Chad<br></div><div><br></div></di= v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Jul 10,= 2018 at 4:00 PM, Marvin Dickens (<a href=3D"mailto:mpdickens AT gmail DOT com">mp= dickens AT gmail DOT com</a>) [via <a href=3D"mailto:geda-user AT delorie DOT com">geda-u= ser AT delorie DOT com</a>] <span dir=3D"ltr"><<a href=3D"mailto:geda-user AT delo= rie.com" target=3D"_blank">geda-user AT delorie DOT com</a>></span> wrote:<br><= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div>Well, I am not a unicor= n...</div><div><br></div>This bug has been around for over a *decade* and h= as been one of the deal breakers for us.<br><div>A solid net list is requir= ed when bringing up non-trivial boards for the first time and later during = DUT</div><div>after engineering changes / repair.=C2=A0</div><div><br></div= ><div>Unless you are a one man shop, a defective net list that has to be ma= ssaged in order to be=C2=A0</div><div>reliable will always suspect.</div><d= iv><br></div><div><br></div><div>Regards</div><div><br></div><div>Marvin</d= iv></div> </blockquote></div><br></div> --000000000000f9a8fc0570ab5426--
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