kicad-developers team mailing list archive

[Chris Pavlina <pavlina.chris@xxxxxxxxx>]

On Fri, Jul 22, 2016 at 10:54:27AM +0200, Tomasz Wlostowski wrote:
> On 21.07.2016 23:16, Chris Pavlina wrote:
> > Really, really nice! I made it do a thing! https://misc.c4757p.com/kicad_sim.png
> > 
> > I feel bad to provide a bug report on my very first communcation on
> > this, but... found one: not sure if this sort of thing is actually
> > standard SPICE or an LTspice extension, but I tried parameterizing a
> > component value, setting a resistor's value to {R} - that sort of thing
> > leads to irrecoverable lockups here.
> > 
> 
> Hi Chris,
> 
> Two quick questions:
> - Do you have NGspice compiled with XSPICE support?
> - Could you run eeschema with forced "C" locale?

Yup, ngspice has XSPICE support compiled in. Forcing C locale changes
the behavior slightly but doesn't fix it:

With default locale (en_US.utf8), a simple circuit consisting of a
voltage source V=12 and a resistor {R} with the parameter left
unspecified freezes kicad completely (can only be quit by SIGTERM). With
C locale, this doesn't seem to cause a freeze, but after attempting
to specify that parameter by adding ".param R 12", *then* it freezes.

> 
> Tom
> > On Thu, Jul 21, 2016 at 09:37:57PM +0200, Tomasz Wlostowski wrote:
> >> Hi,
> >>
> >> As some of you have noticed, we've been working on a "secret" feature
> >> during the hackathon at CERN. The feature we're talking about is an
> >> integrated circuit simulator. Currently it features:
> >> - Seamless integration into schematic editor,
> >> - AC/Transient/DC sweep simulations,
> >> - Voltage probing from the schematics,
> >> - Live tuning of component values.
> >>
> >> A video demonstrating the capabilities of the new simulator is available
> >> on Tom's YouTube channel [1].
> >>
> >> The code is currently available in the ngspice branch on Tom's GitHub
> >> [2] for review & testing. It's a big feature, so we didn't want to push
> >> it immediately to the product branch. We'll greatly appreciate your
> >> feedback!
> >>
> >> The simulator uses ngspice [3] as the Spice kernel. We'd like to thank
> >> ngspice developers for providing a DLL interface which made seamless
> >> integration of ngspice into Kicad possible.
> >>
> >> In order to get started:
> >> - install ngspice shared library (is not provided by many Linux distros,
> >> Arch Linux is a known exception, so you might have to compile it from
> >> the sources with --with-ngshared --enable-xspice options).  Windows
> >> DLLs, msys2 PKGBUILD & binary packages (to be included soon in
> >> the official msys2 repo, currently merged to
> >> https://github.com/Alexpux/MINGW-packages/) & Linux script to build the
> >> library are available at [4].
> >> - compile eeschema with -DKICAD_SPICE=ON option,
> >> - have a look at some examples in demos/simulation directory.
> >>
> >> Happy simulating,
> >> Tom
> >>
> >> [1] https://youtu.be/A2_-hdRcf4U
> >> [2] https://github.com/twlostow/kicad-dev/tree/ngspice
> >> [3] http://ngspice.sourceforge.net/
> >> [4] https://orson.net.pl/pub/libngspice
> >>
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