Minimal Setup for sky130 - Workspace

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Step 1: Clone repository

Clone laygo2_workspace_sky130 from GitHub:

$ git clone https://github.com/niftylab/laygo2_workspace_sky130.git
$ cd laygo2_workspace_sky130
$ git submodule init
$ git submodule update

Step 2: Set path variables for magic

Initialize the Magic template cell search path for this tutorial:

$ ./mag_set_path.sh
$ ./start_mag.sh
% path

These .sh scripts initialize the ‘.maginit_personal’ file with the cell search path for ‘magic’. Your Magic search path should include the following directories:

• WORK_DIR/magic_layout/skywater130_microtemplates_dense
• WORK_DIR/magic_layout/logic_generated

These paths are the default template paths for the example code in laygo2.

Step 3: Test laygo2

Several package prerequisites (such as NumPy) should be installed for LAYGO2. The base installation of Anaconda fulfills the package requirements.

$ source .bashrc
$ ipython profile create
$ cp ipython_config_init.py PROFILE_DIR/ipython_config.py
$ ipython ( or ./start_bag.sh )

The ‘.bashrc’ file sets the Python path of laygo2 by setting environment variables. The profile directory is printed to the shell. (Example: WORK_DIR/.ipython/profile_default/ipython_config.py) Overwrite the default ‘ipython_config_init.py’ to the config file in the repository.

If PROFILE_DIR is not output, or it doesn’t contain WORK_DIR, check if the .ipython directory exists in WORK_DIR. If so, PROFILE_DIR = WORK_DIR/.ipython/profile_default.

    import sys
    print(sys.path)

The printed Python path should include ‘WORK_DIR/laygo2’.