Mail Archives: geda-help/2021/07/09/11:04:56
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| From: | "hyral.sacai (hyral DOT sacai AT gmail DOT com) [via geda-help AT delorie DOT com]" <geda-help AT delorie DOT com>
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| Date: | Sat, 10 Jul 2021 00:03:45 +0900
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| Message-ID: | <CACU7o4DHROoMGEnEz3rRZV4ttnbo7TNTaO2RbX=3QK8=Zya4rQ@mail.gmail.com>
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| Subject: | Re: [geda-help] Can we specify a file/netlist-library path in the
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| gafrc file?
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| To: | geda-help AT delorie DOT com
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| Reply-To: | geda-help AT delorie DOT com
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On Fri, Jul 9, 2021 at 9:07 PM John Doty <jpd AT noqsi DOT com> wrote:
> On Jul 9, 2021, at 7:32 AM, hyral.sacai (hyral DOT sacai AT gmail DOT com) [via
> geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:
>
> Unfortunately, I'm using a special circuit simulator that does not like
> the gnetlist result where symbols are associated with sub-schematics via
> the source attribute.
>
>
> What, exactly, is the trouble?
>
> Have you tried the spice-noqsi back end? It can handle this sort of
> organization. See
> https://github.com/noqsi/gnet-spice-noqsi/wiki/Broadband-amplifier-board.
> Unfortunately, I am no longer maintaining it for gEDA, but it works fine =
in
> Lepton, I just used it yesterday.
>
When using the source attribute, the gnetlist (spice-sdb) result is a
flattened netlist using syntax like "X2/X0/R1" "X1/X3/R1" and the circuit
simulator does not support this, but it does support the .SUBCKT
hierarchical approach which I can achieve by using the file attribute to
point to the appropriate subckt netlist file, it's just that it would be
nice to specify a folder of subckt netlist files that gnetlist will search
in so that users of my library don't have to specify the exact location of
those netlists.
I took a look at the BBamp example and tried to emulate the attributes
pointed out in the following text:
> The BBamp.sch schematic is the amplifier itself. Its symbol is included i=
n the drawing as a graphical comment for the reader, using a graphical=3D1 =
attribute. A toplevel "spice-prolog=3D.subckt BBamp %up" attribute creates =
the .subckt "card" using the %up function. It is mirrored by a "spice-proto=
type=3DX? %down BBamp" attribute in the symbol itself. The SPICE code gener=
ated by this pair of attributes mimics the semantics of hierarchy traversal=
in gnetlist. The symbol also contains "file=3DBBamp.cir". This generates "=
.INCLUDE BBamp.cir" in the higher level SPICE netlist.
>
>
I couldn't get it to work right away, probably missed something, will look
at it more earnestly later.
But if I do use the source attribute approach with the spice-noqsi backend,
will it generate a netlist that uses .SUBCKT definitions instead of the
forward slash syntax (X1/X2/X3...)? From the above description, it sounds
like it does.
On Fri, Jul 9, 2021 at 10:14 PM Roland Lutz <rlutz AT hedmen DOT org> wrote:
>
> The spice-noqsi backend works fine in gEDA/gaf. Also, it shouldn't be
> hard to adapt the Python version of the backend to your needs:
>
>
> https://github.com/rlutz/geda-gaf/blob/master/xorn/src/backend/gnet_spice=
_noqsi.py
Thanks, will take a look at that.
Hyral
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<div dir=3D"ltr"><div dir=3D"ltr"></div><div><br></div><div><div dir=3D"ltr=
" class=3D"gmail_attr">On Fri, Jul 9, 2021 at 9:07 PM John Doty <<a href=
=3D"mailto:jpd AT noqsi DOT com" target=3D"_blank">jpd AT noqsi DOT com</a>> wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div><blockqu=
ote type=3D"cite"><div>On Jul 9, 2021, at 7:32 AM, hyral.sacai (<a href=3D"=
mailto:hyral DOT sacai AT gmail DOT com" target=3D"_blank">hyral DOT sacai AT gmail DOT com</a>) =
[via=C2=A0<a href=3D"mailto:geda-help AT delorie DOT com" target=3D"_blank">geda-h=
elp AT delorie DOT com</a>] <<a href=3D"mailto:geda-help AT delorie DOT com" target=3D=
"_blank">geda-help AT delorie DOT com</a>> wrote:</div><br><div><span style=3D"=
font-family:Helvetica;font-size:12px">Unfortunately, I'm using a specia=
l circuit simulator that does not like the gnetlist result where symbols ar=
e associated with sub-schematics via the source attribute.=C2=A0</span></di=
v></blockquote><div><br></div>What, exactly, is the trouble?<br><br></div><=
div>Have you tried the spice-noqsi back end? It can handle this sort of org=
anization. See=C2=A0<a href=3D"https://github.com/noqsi/gnet-spice-noqsi/wi=
ki/Broadband-amplifier-board" target=3D"_blank">https://github.com/noqsi/gn=
et-spice-noqsi/wiki/Broadband-amplifier-board</a>. Unfortunately, I am no l=
onger maintaining it for gEDA, but it works fine in Lepton, I just used it =
yesterday.</div></div></blockquote><div><br></div></div><div>When using the=
source attribute, the gnetlist (spice-sdb) result is a flattened netlist u=
sing syntax like "X2/X0/R1" "X1/X3/R1" and the circuit =
simulator does not support this, but it does support the .SUBCKT hierarchic=
al approach which I can achieve by using the file attribute to point to the=
appropriate subckt netlist file, it's just that it would be nice to sp=
ecify a folder of subckt netlist files that gnetlist will search in so that=
users of my library don't have to specify the exact location of those =
netlists.=C2=A0</div><div><br></div><div><div>I took a look at the BBamp ex=
ample and tried to emulate the attributes pointed out in the following text=
:</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex"><pre style=3D"box-=
sizing:border-box;font-family:ui-monospace,SFMono-Regular,"SF Mono&quo=
t;,Consolas,"Liberation Mono",Menlo,monospace;font-size:12px;marg=
in-bottom:0px;margin-top:0px;color:rgb(36,41,47);white-space:pre-wrap">The =
BBamp.sch schematic is the amplifier itself. Its symbol is included in the =
drawing as a graphical comment for the reader, using a graphical=3D1 attrib=
ute. A toplevel "spice-prolog=3D.subckt BBamp %up" attribute crea=
tes the .subckt "card" using the %up function. It is mirrored by =
a "spice-prototype=3DX? %down BBamp" attribute in the symbol itse=
lf. The SPICE code generated by this pair of attributes mimics the semantic=
s of hierarchy traversal in gnetlist. The symbol also contains "file=
=3DBBamp.cir". This generates ".INCLUDE BBamp.cir" in the hi=
gher level SPICE netlist.</pre></blockquote><div><br></div><div>I couldn=
9;t get it to work right away, probably missed something, will look at it m=
ore earnestly later.</div></div><div>But if I do use the source attribute a=
pproach with the spice-noqsi backend, will it generate a netlist that uses =
.SUBCKT definitions instead of the forward slash syntax (X1/X2/X3...)? From=
the above description, it sounds like it does.</div><div><br></div><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Jul 9, 20=
21 at 10:14 PM Roland Lutz <<a href=3D"mailto:rlutz AT hedmen DOT org" target=
=3D"_blank">rlutz AT hedmen DOT org</a>> wrote:<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex"><br>
The spice-noqsi backend works fine in gEDA/gaf.=C2=A0 Also, it shouldn'=
t be <br>
hard to adapt the Python version of the backend to your needs:<br>
<br>
<a href=3D"https://github.com/rlutz/geda-gaf/blob/master/xorn/src/backend/g=
net_spice_noqsi.py" rel=3D"noreferrer" target=3D"_blank">https://github.com=
/rlutz/geda-gaf/blob/master/xorn/src/backend/gnet_spice_noqsi.py</a></block=
quote><div><br></div><div>Thanks, will take a look at that.</div><div><br><=
/div><div>Hyral=C2=A0</div></div></div>
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