https://open-source-silicon.dev
Join Slack
<@U016EM8L91B> Any idea how to link sky130 PDK to a new xschem schematics ?
# xschem
p
@User Any idea how to link sky130 PDK to a new xschem schematics ?
c
@promach In case you haven't seen this, I found it helpful: https://github.com/bluecmd/learn-sky130/blob/main/schematic/xschem/getting-started.md
p
@Chris Jones Do I need
Copy code
append XSCHEM_LIBRARY_PATH :${XSCHEM_SHAREDIR}/xschem_library
? What is 
XSCHEM_SHAREDIR
?
c
Sorry TBH I don't know, but I followed the instructions and it pretty much worked I think.
s
@promach, XSCHEM_SHAREDIR is xschem's install location, where it looks for all its files, in particular $XSCHEM_SHAREDIR/xschem_library contains the devices/ library with all the technology-independent primitives, like spice resistors, voltage sources, ideal capacitors etc.
so if you set XSCHEM_LIBRARY_PATH as a ':' separated list of directories to look for components you certainly want to include the devices/ library.
p
Copy code
[phung@dell ~]$ ls /usr/local/share/xschem/
break.awk                   gschemtoxschem.awk        order_labels.awk  symgen.awk   vhdl.awk
change_index.tcl            hspice_backannotate.tcl   rawtovcd          systemlib    <http://xschem.help|xschem.help>
convert_to_verilog2001.awk  <http://keys.help|keys.help>                 resources.tcl     tedax.awk    xschem_library
flatten.awk                 make_sym.awk              sort_labels.awk   utile        xschemrc
flatten_tedax.awk           ngspice_backannotate.tcl  spice.awk         verilog.awk  xschem.tcl
[phung@dell ~]$
@Stefan Schippers in my case, is 
XSCHEM_SHAREDIR
equivalent to 
/usr/local/share/xschem
?
s
@promach, yes this is the default, in your xschemrc you can either use $XSCHEM_SHAREDIR/xschem_library or /usr/local/share/xschem/xschem_library
👍 1
when you place a voltage source, it will saved in the schematic as 'devices/vsource.sym' , this allows xschem to find the object in the filesystem, by looking in the list of XSCHEM_LIBRARY_PATH paths
@promach this repository contains the xschem components for the sky130 process, and the xschemrc in the xschem_sky130 directory is configured to run xschem with the correct paths. There are some example designs.
14 Views
Open in Slack
PreviousNext
Powered by

What is Linen?

Linen is a search-engine friendly community platform. We offer integrations with existing Slack/Discord communities and make those conversations Google-searchable.

Powered by