cicsim 0.2.0

Custom IC Creator Simulation Tools

Custom IC Creator Simulation Tools

Why

This is a script package I use to control ngspice, it can

• Run corner simulations
• Create IPs (used in wulffern/aicex )
• Create simulation directories
• View waveforms

Changelog

Version	Comment
0.0.1	First version of cicsim
0.0.3	All in on open source tools
0.1.2	First version on pipy
0.1.3	github action update
0.1.4	Added waveform viewer
0.1.5	Update waveform viewer
0.1.6	wave: added search. Added docs
0.1.7	Bugfix: ngraw deprecated float_
0.1.8	Added template command
0.1.9	Bugfix: allow absolute path in template command
0.1.11	Added directory name option (dname) to template
0.1.12	Added sndrfs and enobfs to fftWithHanning
0.1.13	Added docs
0.1.14	Nothing exiting
0.1.15	Added "archive" command to save old simulations. Added "--no-color" option
0.1.16	Fixed ngspice-45 compatibility. Fixed regex escapes. Fixed seed value handling
0.1.17	Updated docs and spec
0.1.18	Code quality overhaul: replaced os.system with subprocess, replaced eval with ast.literal_eval, migrated to Python logging module, added documentation for all CLI commands, removed setup.py in favor of pyproject.toml
0.1.19	Wave viewer overhaul: measurement cursors (A/B) with delta readout, scroll-wheel zoom, keyboard shortcuts, engineering notation on axes (EngFormatter), Export PDF, legend toggle, regex search tooltip, Help menu. Fixed pyproject.toml license for Python 3.8. Added unit tests

Install this module

If you want to follow the latest and greatest

git clone https://github.com/wulffern/cicsim
cd cicsim
python3 -m pip install --user -e . 

If you want the latest stable

python3 -m pip install cicsim

Get started with simulation

Head over to Sky130nm tutorial to see cicsim in action.

Get started with waveform viewer

Make sure you install a python version with tk. On my mac it was

brew install python-tk

Once installed, I do

cicsim wave output_tran/tran_SchGtTtKffVh_*

Wave viewer keyboard shortcuts

Key	Action
a	Set cursor A at mouse position
b	Set cursor B at mouse position
Escape	Clear cursors
f	Auto scale (fit)
r	Reload all waves
l	Toggle legend
Delete	Remove selected wave
Ctrl+O	Open raw file
Ctrl+P	Export PDF
Ctrl+N	New plot tab
Ctrl+A	Add axis
Ctrl+Q	Quit
Scroll	Zoom x-axis
Shift+Scroll	Zoom y-axis

Commands

Usage: cicsim [OPTIONS] COMMAND [ARGS]...

  Custom Integrated Circuit Simulation

  This package provides helper scripts for simulating integrated circuits

  Check website for more information : http://analogicus.com/cicsim/

Options:
  --color / --no-color  Enable/Disable color output
  --help                Show this message and exit.

Commands:
  archive      Save a cicsim run output
  plot         Plot from rawfile
  portreplace  Replace ${PORTS} and ${VPORTS} with the subcircuit ports...
  results      Results of single runfile
  run          Run a ngspice simulation of TESTBENCH
  simcell      Create a ngspice simulation directory for a Cell
  srun         Run a spectre simulation of TESTBENCH
  summary      Generate simulation summary for results
  template     Run an IP template with <options> YAML file
  wave         Open waveform viewer