EPWave Documentation¶

Overview¶

EPWave is a free interactive browser-based waveform viewer for design and verification engineers. The primary use cases are:

• Run prototype/example code on EDA Playground and view wave results with EPWave.
• Quickly view waves for simulations that ran in the cloud (private or public).
  • Example: EPWave plugs into existing browser-based regression systems.

EPWave is part of the EDA Playground tool suite.

Example Waves¶

• Trivial Example
• OpenCores Example

Support, Feature Requests and Bug Fixes¶

News and Site Updates¶

New features are frequently being added to EPWave and EDA Playground. Follow the updates on your favorite social media site:

• @EDAPlayground on Twitter
• EDA Playground on Facebook
• EDA Playground on Google+

Credits¶

EPWave was created by Doulos.

Loading Waves from EDA Playground¶

You can run a simulation on EDA Playground and load the resulting waves in EPWave.

• Go to your code on EDA Playground. For example: RAM Design and Test

• Make sure your code contains appropriate function calls to create a *.vcd file. For example:

  initial begin
    $dumpfile("dump.vcd");
    $dumpvars(1);
  end
  

• Select a simulator and check the Open EPWave after run checkbox. (Not all simulators may have this run option.)

  

• Click Run. After the run completes, the resulting waves will load in a new EPWave window. (Pop-ups must be enabled.)

Loading Waves from File or URL¶

• On EPWave Homepage, specify the wave dump file to load. There are 2 sources for loading waves.

  1. Specify the URL pointing to the waves accessible over the web, such as a file in a public Dropbox folder.
  2. Upload the wave dump from your own computer.

• After specifying the wave dump file, you can click the Load button to load the waves.

• If your wave dump contains 2000 signals or larger, you may specify a Signal Filter so that fewer than 2000 signals are loaded. If Signal Filter is not specified, then only the first 2000 signals will be loaded. Click on the + on the top left to open the Signal Filter. For *.vcd files, the filter accepts regular expressions.

  

  After specifying the Signal Filter, click the Load button to load the waves.

• (Optional) You may specify the From and/or To times to limit the time range of the loaded wave. If your wave dump contains a lot of data, then the ending To time will automatically be limited.

  

Viewing Signals¶

After loading the waves, you can display signals by using the Get Signals button.

Can I view the waves from my EDA Playground sim using EPWaves?¶

Yes, see Loading Waves from EDA Playground

Which wave formats are supported?¶

*.vcd wave format is currently supported. *.fsdb support is available for private deployments.

How do I get updates about new EPWave features?¶

New features are frequently being added to EPWave and EDA Playground. Follow the updates on your favorite social media site:

• @EDAPlayground on Twitter
• EDA Playground on Facebook
• EDA Playground on Google+

What are the limits for loading waves?¶

The *.vcd file size limit is 20MB. Larger limits are available for private deployments.

If the wave dump contains more than 2000 signals, then only the first 2000 signals will be loaded. You may use the Signal Filter to load the other signals. See Loading Waves from File or URL

Which web browsers are supported?¶

• Firefox
• Chrome
• Internet Explorer 9 or higher

How do I log in if I don’t have a Google or Facebook account?¶

We are working on providing additional ways to sign into EDA Playground. Meanwhile, please create a new Google account at https://accounts.google.com/SignUp and use that to sign in.

Note: If you’re using EDA Playground on a private network, log in with the authentication credentials for your network.

I have more questions. How do I get support?¶

EPWave is actively being improved. If you need help or have suggestions, support is available on EDA Playground forum

If you see a bug, however minor, please post on the forum or file a new issue at https://github.com/edaplayground/epwave/issues (requires GitHub account)