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foss-eda-tools / third_party / opencircuitdesign.com / open_pdks / e4b453599ad0b112e90c89220145c8219dda3cb0
commite4b453599ad0b112e90c89220145c8219dda3cb0[log] [tgz]
authorTim Edwards <tim@opencircuitdesign.com>Sat Jan 01 11:53:31 2022 -0500
committerTim Edwards <tim@opencircuitdesign.com>Sat Jan 01 11:53:31 2022 -0500
tree8f88b7c7ce7dc61dd7fffc61a752e25adcc57515
parentfde2916fdf3eb72a21c2180a141bcf0d9ea9ab5f [diff]
Several corrections:  (1) Netgen setup for sky130 changed to split out
the ESD nFET and pFET to give them a 7% tolerance in width instead of
the usual 1% tolerance, because magic calculates the effective width
due to the flanged gate slightly differently.  (2) Corrected the
parameterized devices in magic, which had wrong routine names for the
inductor devices, and an incorrect spelling for two of the vertical
parallel plate capacitors.  (3) Added length and width to the short/open
resistors in sky130_fd_io.spice.  (4) Corrected a connection to the
OGC_HVC pin in the verilog for the power pads (the pin is floating, so
the connection is not important, but needed for LVS).  Items (3) and
(4) are incomplete and ongoing.
5 files changed
tree: 8f88b7c7ce7dc61dd7fffc61a752e25adcc57515
  1. .github/
  2. common/
  3. runtime/
  4. scripts/
  5. sky130/
  6. .gitignore
  7. configure
  8. docs.txt
  9. LICENSE
  10. Makefile.in
  11. README.md
  12. VERSION
README.md

Open-PDKs (open_pdks)

Summary:

Automatic setup of PDKs for open-source tools from foundry sources.

Builds out and populates a new set of directories and subdirectories in the efabless format, with the efabless name for the PDK at the top, followed by categories “libs.ref” (IP) and “libs.tech” (EDA tool setup), each with subcategories corresponding to layout, abstract views, netlists, etc. for the IP; and magic, netgen, qflow, etc., for the EDA tool setup.

The populated PDK directories can contain either copies of files from the foundry sources, links to the foundry sources, or links back to another PDK.

Generates magic layout views for all vendor IP for which either a GDS view or a LEF view exists. Annotates the views as needed to handle ports, bounding boxes, etc.

This distribution contains sources for building out the SkyWater SKY130 130nm process. Sources for the foundry process data must be obtained separately. Read the README file in subdirectory sky130/ for instructions on obtaining and building the SkyWater sky130A PDK.

License:

Open_PDKs is open-source software distributed under the Apache-2.0 license. See file LICENSE for the complete license text.

Instructions:

git clone https://github.com/RTimothyEdwards/open_pdks.git
cd open_pdks
./configure [options]
make
[sudo] make install

where the configure [options] are specific to each foundry PDK supported by open_pdks and can be queried using

./configure --help

At a minimum you will want to pass a configure option to declare the location of the PDK vendor source distribution (which can be obtained separately),

./configure --enable-[PDK_name]-pdk=[path]

The open_pdks version of the PDK can be built locally within open_pdks without the need to declare an install target or run “make install”. However, it is recommended to declare a target location and install there, using

./configure --prefix=[path] --enable-[PDK_name]-pdk=[path]

followed by “make” and “make install”.

Also see the website at http://opencircuitdesign.com/open_pdks/. The “Install” page has full instructions for configuring and installing open_pdks.