ngspice Xspice code model support.
2012 05 06
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Use configure the flag --enable-xspice to compile xspice support in,
when you run the ./configure script.
This creates a new command, "codemodel", which you can
use to load a codemodel.
The command codemodel attempts to load all the codemodels specified in the
arguments, eg
"ngspice 1 ->codemodel /usr/lib/ngspice/analog.cm /usr/lib/ngspice/spice2poly.cm"
( note: the codemodel path must begin with ./ or / to work )
The codemodels are automatically compiled and then installed in
${prefix}/lib/ngspice/ when ngspice is installed.
To create your own codemodels:
* Unpack the ngspice source and compile as normal.
* cd src/xspice/icm
* make the directory structure for the new library:
Create the nested library_name and module_name directories and copy the
source code to the module_name directories
src/xspice/icm/ <library_name> /
modpath.lst udnpath.lst
<module_name> /
files:
cfunc.mod ifspec.ifs ( for a device )
or
udnfunc.c ( or a user defined node )
* For each library create the files modpath.lst and udnpath.lst, which
contain a list of the user devices and nodes respectivily, in the location
shown above.
* Edit src/xspice/icm/makedefs.in and alter the CMDIRS line to include
your library directory.
* Run make in the src/xspice/icm directory. ( the makefile does the rest )
The codemodel can be then found in
src/xspice/icm/<library_name>/<library_name>.cm
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SPICE2 POLY codemodel support.
SPICE2 POLY attributes are now available for controlled sources.
To use POLY attributes, configure and install ( make install )
ngspice with the --enable-xspice flag set as described above.
After compilation of ngspice edit
${prefix}/share/tclspice/scripts/spinit or
${prefix}/share/ngspice/scripts/spinit
( depending if you included tcl support or not )
and uncomment the
"* codemodel /usr/lib/spice/spice2poly.cm"
line and edit as required. ( the path to spice2poly.cm may be wrong )
( alternativily create a ~/.spiceinit file with the above codemodel line )
Then read in your SPICE netlist. SPICE 2 POLY attributes in
controlled sources will be translated into .models invoking the
spice2poly codemodel. You should be able to run ngspice and simulate
in the usual way!
Please direct questions/comments/complaints to the ngspice user's list
or forum.
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