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README.md

OpenROAD-flow-scripts

alt text

Quick Start

  1. Follow the installation instructions in the top-level README
  2. Build an example design
cd flow
make

This will build an example design gcd using the nangate45 platform. The resulting GDS will be available at flow/results/nangate45/gcd/6_final.gds. The flow should take only a few minutes to produce a GDS.

Designs

Sample design configurations are available in the designs directory. You can select a design using either of the following methods:

  1. The flow Makefile contains a list of sample design configurations at the top of the file. Uncomment the respective line to select the design
  2. Specify the design using the shell environment, e.g. make DESIGN_CONFIG=./designs/nangate45/swerv.mk or export DESIGN_CONFIG=./designs/nangate45/swerv.mk; make By default, the simple design gcd is selected. We recommend implementing this design first to validate your tool and flow setup.

Adding a New Design

To add a new design, we recommend looking at the included designs for examples of how to set one up.

⚠️ Please refer to the known issues and limitations document for information on conditioning your design/files for the flow. We are working to reduce the issues and limitations, but it will take time.

Platforms

OpenROAD-flow-scripts supports Verilog to GDS for the following open platforms:

  • Nangate45 / FreePDK45

These platforms have a permissive license which allows us to redistribute the PDK and OpenROAD platform-specific files. The platform files and license(s) are located in platforms/{platform}.

OpenROAD-flow-scripts also supports the following commercial platforms:

  • TSMC65LP
  • GF14 (in progress)

The PDKs and platform-specific files for these kits cannot be provided due to NDA restrictions. However, if you are able to access these platforms, you can create the necessary platform-specific files yourself.

Once the platform is setup. Create a new design configuration with information about the design. See sample configurations in the design directory.

Adding a New Platform

At this time, we recommend looking at nangate45 as an example of how to set up a new platform for OpenROAD-flow-scripts.

Implement the Design

Run make to perform Verilog to GDS. The final output will be located at flow/results/{platform}/{design_name}/6_final.gds

TIP! Start with a small tiny submodule in your design with few pins