@Amro Tork @Krzysztof Herman I have a question on how to properly setup the IHP PDK for KLayout. In some situations (like on our IIC-OSIC-TOOLS image) the PDK sits in a read-only location, and even the user home directory is read-only. How should one setup KLayout and environment variables properly for this to work? E.g. accessing the right

.lyt

and

.lyp

files, and especially properly finding all the Python stuff? I am not sure that the current setup (if I look into the

.lyt

for example) supports such a usage model. Here is a GH issue to track the discussion: https://github.com/IHP-GmbH/IHP-Open-PDK/issues/87

Can I get a clarification on

.param mc_mm_switch=0

. I think it's only required when I'm using the sky130 libraries? Are there any docs about what it does? Also, I have 2 computers, one needs the param set to simulate, the other doesn't. Both are using the same xschem and pdk version.

Hi, Can you please tell if Open Ram support banks right now @Matthew Guthaus? When I tried to run by putting "num_banks = 2" in config file , I got error saying "bl0 net is not found in timing paths"

Hi all, I would like to know what is the best method to run multiple process corner simulations. From what I understand, you can generate the netlist file for a typical process corner and then modify the model files in the netlist in order to generate all the other desired process corner netlists. Then you need to run each netlist individually using ngspice in order to get the results. Of course all of this can be automated with some scripting. Is there a way to avoid all that and just define somehow multiple corner simulations inside xschem or inside a single netlist? Also, if the method described above can not be avoided, is there a way to gather all the results generated by the individual ngspice runs in a single raw file? Thanks

@fil is above /.xschemsimulations/ in the error message or is there a missing slash? by default the path should be

/home/username/.xschem/simulations/test_mim_cap.spice

Did you install open_pdks? Now the right way to use sky130 and xschem is to install the spice models via open_pdks, as explained in this . Consider that you don't need anymore to manually clone the skywater-pdk repository, it will be pulled in automatically by open_pdks, just give it the

--enable-sky130-pdk

option when running configure:

./configure --enable-sky130-pdk --prefix=/pdk/root/dir

in above line /pdk/root/dir must be replaced by you to the place on the system where you want to install the pdk. If you don't give a --prefix it will be installed in /usr/local. A good choice for a single user setup is to add

--prefix=/home/username

. After installing open_pdks (which requires magic and xschem as prerequisites) create an empty directory, copy the file /pdk/root/dir/share/pdk/sky130A/libs.tech/xschem/xschemrc into this directory and start xschem from there. Things to check in the xschem tcl prompt after starting xschem: 1. `puts $netlist_dir`; check this directory exists and is read/writeable. 2. `puts $XSCHEM_LIBRARY_PATH`; Do all the directories listed exist on the system? 3. `puts $SKYWATER_MODELS`: is this path correct? inside this path there must be the top

sky130.lib.spice

file.

I had difficulties running openroad -gui in Ubuntu 20.04, which is also a subject of an open issue in openlane: https://github.com/The-OpenROAD-Project/OpenLane/issues/1149 @Matt Liberty suggested using: "I see that running docker with "--security-opt apparmor=unconfined" or "--privileged" fixes the crash." I edited Makefile in openlane and add these options, both worked and opened openroad -gui However, when I try to read_lef or read_def commands and try to read my macro's final outputs, it gives tons of warnings related to undefined layer (met2) or (met3) referenced and do not open the layout [WARNING ODB-0176] error: undefined layer (met2) referenced [WARNING ODB-0176] error: undefined layer (met3) referenced [WARNING ODB-0176] error: undefined layer (met3) referenced [WARNING ODB-0176] message limit reached, this message will no longer print [INFO ODB-0225] Created 1 library cells [INFO ODB-0226] Finished LEF file: lef_files/mba_core_region.lef any idea what can cause this?

What I'm mostly curious about is why that wasn't caught by the timing analysis ?

Hello all! I need help in post- layout simulation of my design using sky130. If anyone could provide me some learning resources for that. @User @User

How can I integrate sky130 with cadence tools

@donn So, I'd like to run OpenLane2 for iHP 🙂 Now, this would just be for the TT top level assembly which uses very little steps (most are disabled/not run), so I'm hoping that the required porting will be minimal. Do you forsee any big obstacle ? How does OL2 configure openroad for a given PDK ?