Mail Archives: geda-user/2015/06/12/12:04:46
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On Jun 12, 2015, at 9:36 AM, Russell Nelson (russnelson AT gmail DOT com) =
<geda-user AT delorie DOT com> wrote:
> The problem there is that you could have an "any pin" relationship (as =
in your example), or an "all pins" relationship as in this example: the =
75441 quad H-bridge has four ground pins which are also heat sinks, and =
which all should be connected to a nice fat ground plane. AFAIK, =
gschem/pcb has no way to express that relationship.
>=20
Since gschem supports attaching arbitrary attributes to symbols and =
pins, and gnetlist can do pretty much anything you want with them, =
geda-gaf is capable of supporting this desire. But the layout program =
has to provide a way to express this in the netlist, and I am not aware =
of one that does this.
John Doty Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br><div><div>On Jun 12, 2015, at 9:36 AM, Russell =
Nelson (<a href=3D"mailto:russnelson AT gmail DOT com">russnelson AT gmail DOT com</a>) =
<<a href=3D"mailto:geda-user AT delorie DOT com">geda-user AT delorie DOT com</a>>=
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr" style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;">The problem there is that you could have an "any pin" relationship =
(as in your example), or an "all pins" relationship as in this example: =
the 75441 quad H-bridge has four ground pins which are also heat sinks, =
and which all should be connected to a nice fat ground plane. AFAIK, =
gschem/pcb has no way to express that relationship.</div><br =
class=3D"Apple-interchange-newline"></blockquote><br></div><div>Since =
gschem supports attaching arbitrary attributes to symbols and pins, and =
gnetlist can do pretty much anything you want with them, geda-gaf is =
capable of supporting this desire. But the layout program has to provide =
a way to express this in the netlist, and I am not aware of one that =
does this.</div><br><div apple-content-edited=3D"true">
<span class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: auto; =
-khtml-text-decorations-in-effect: none; text-indent: 0px; =
-apple-text-size-adjust: auto; text-transform: none; orphans: 2; =
white-space: normal; widows: 2; word-spacing: 0px; "><p style=3D"margin: =
0.0px 0.0px 0.0px 0.0px"><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica">John Doty<span =
class=3D"Apple-converted-space"> <span =
class=3D"Apple-converted-space"> </span><span =
class=3D"Apple-converted-tab"> <span =
class=3D"Apple-converted-space"> </span></span></span>Noqsi =
Aerospace, Ltd.</font></p><p style=3D"margin: 0.0px 0.0px 0.0px =
0.0px"><a href=3D"http://www.noqsi.com/">http://www.noqsi.com/</a></p><p =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px"><font face=3D"Helvetica" =
size=3D"3" style=3D"font: 12.0px Helvetica"><a =
href=3D"mailto:jpd AT noqsi DOT com">jpd AT noqsi DOT com</a></font></p><br =
class=3D"Apple-interchange-newline"></span>
</div>
<br></body></html>=
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