Undulate

Introduction

WaveDrom is a Free and Open Source online digital timing diagram (waveform) rendering engine that uses javascript, HTML5 and SVG to convert a WaveJSON input text description into SVG vector graphics.

WaveJSON is an application of the JSON format. The purpose of WaveJSON is to provide a compact exchange format for digital timing diagrams utilized by digital HW / IC engineers.

However, this great tool need either a headless web browser or node.js to generate documentations. Python being mainstream and cross-platform why not leverage its power?

This version is not a mere copy of the original one. The goals are to ensure the compatibility and to add new features. To name a few:

• long name for nodes for creating edges from one specific point to another
• metastability wave
• analogue waveforms (step, capacitive step, slewing, arbitrary waves, overlay up to 4 waves)
• add annotations (global time compression, vertical/horizontal lines)
• style overloading (font-size, fill color, stroke color, stroke-width, stroke-dasharray, ...)

The inputs could be either:

• json
• WaveJSON (cson)
• yaml
• toml

while outputs would be:

• svg for web pages
• postscript for latex documentation
• pdf for pdflatex documentation
• png for word, libreoffice, ...

Documentation

The complete documentation is available here

License

See LICENSE.

Installation

It is recommended to create a python environment to not pollute the python of your operating system.

⁉️ some OS relies on specific version of python packages. One use a workflow with specific tools. To not break this vital components, the environment boxes in a specific location packages and dependencies.
Tools: pyenv virtualenv lmod

If it's intended, or you do it on purpose, you can skip directly to step #3.

1. create a new environment

With pyenv:

pyenv virtualenv <name-of-the-environment>

with virtualenv package:

python3 -m venv <path where to store the environments>

2. Activate the newly created environment

With pyenv:

pyenv activate <name-of-the-environment>

with virtualenv package:

source <path where to store the environments>/bin/activate

3. Finally, install it

python3 -m pip install git+https://github.com/LudwigCRON/undulate.git

4. Use it!

From now on, in the environment, you can call the script directly wherever you are

cd ${HOME}/projects/my-fancy-thing/documents/
undulate -f cairo-png --dpi 300 -i input.yaml -o output.png

To deactivate your environment call in the terminal

deactivate