open-source-silicon.dev

I am lost in the PDK.
Where do I find the layout of the bipolar devices e.g. pnp and npn ?

Did find gds version in <https://github.com/mabrains/sky130_klayout_pdk>

`$PDK_ROOT/sky130A/libs.ref/sky130_fd_pr/gds/sky130_fd_pr.gds`.  The layouts are all bundled together in the one library file.  The defined device layouts are:
```sky130_fd_pr__pnp_05v5_W3p40L3p40
sky130_fd_pr__rf_pnp_05v5_W0p68L0p68
sky130_fd_pr__rf_pnp_05v5_W3p40L3p40
sky130_fd_pr__npn_11v0_W1p00L1p00
sky130_fd_pr__rf_npn_05v5_W1p00L1p00
sky130_fd_pr__rf_npn_05v5_W2p00L8p00
sky130_fd_pr__rf_npn_05v5_W2p00L4p00
sky130_fd_pr__rf_npn_05v5_W2p00L2p00
sky130_fd_pr__rf_npn_05v5_W1p00L8p00
sky130_fd_pr__rf_npn_05v5_W1p00L4p00
sky130_fd_pr__rf_npn_05v5_W1p00L2p00
sky130_fd_pr__rf_npn_11v0_W1p00L1p00
sky130_fd_pr__rf_npn_05v5_W5p00L5p00```
Note that there are more layouts than there are models.  There is no difference between those labeled `rf` and those that are not, other than the name.

<@U016EM8L91B> mmm, libs.ref/sky130_fd_pr/gds/ is empty on my installation; I am using version 1.0.301
Do I have to enable some configure option when building open_pdk ?

Shouldn't be necessary.  What configuration options are you giving?

```% ./scripts/config.status --config
'--enable-sky130-pdk' '--prefix=/home/verhaegs/eda/Chips4Makers/CIIC/sky130_1.0.301' '--enable-sram-sky130' '--enable-osu-t12-sky130' '--enable-osu-t15-sky130' '--enable-osu-t18-sky130'```

The important thing would be that if you are pointing to an installation of skywater-pdk outside of open_pdks, then the sky130_fd_pr submodule would need to be initialized;  but since the GDS files are just copied from source to destination (and compiled into a single file along the way), you can also find these layouts in the original skywater-pdk source at, e.g., `libraries/sky130_fd_pr/latest/cells/rf_npn_05v5/sky130_fd_pr__rf_npn_05v5_W1p00L1p00.gds` .  Some of the PNP devices are not present as GDS in the skywater-pdk source, and I have put those layouts in the open_pdks source under `sky130/custom/sky130_fd_pr/gds/`.

If you use `--enable-sky130-pdk` without specifying a path, then the PDK will be cloned into open_pdks `sources/sky130-pdk`.  Is it possible that something happened to the skywater-pdk repository that is preventing submodule initialization?

I do get errors when building sky130. I do `make` in top directory and then it seems to call `make -j all`  in sky130. This is on a 40-core server which seems to overload the memory in the server.
I do seem to have the file `libs.ref/sky130_fd_pr/gds/sky130_fd_pr.gds` now.