Using a Protocol Analyzer, How Do I Capture and Compare I2C Interface Data from Two Separate Environments?

Question from the Customer:

We will be using the Beagle I2C/SPI Protocol Analyzer to test and evaluate our I2C interface. We’re running the evaluation in two very different environments. What I want to do is save log files from each environment and visually compare the information side-by-side. Can we do that?

Response from Technical Support

Thanks for your question! You can easily use the Data Center Software to capture and then compare the I2C Interface data. You can try this out using our software and files of Example Captures.

 Data Center Captured Data

Figure 1: Examples of Captured Data

Here are the simple guidelines to capture and view the comparative data:

To save the data as a tdc log file:

  1. Launch the Data Center Software and connect to the Beagle analyzer.
  2. Set up the Protocol Lens for I2C and then click the Run Capture button to start the data capture.
  3. After capturing enough data, click the Stop button.
    For more information, please refer to section Capturing traffic of the Data Center Software User Manual.

To visually compare the data, all you need to do is run two instances of the Data Center Software, as described below.

    1. Download and install and launch the Data Center Software. Change the name of the Data Center icon to something unique, such as Data Center-1.
      • Open one of the tdc files with this first instance of the Data Center Software.
    2. Copy the Data Center to another directory and change the name of that icon to Data Center-2
      • Open the other tdc file with this second instance of the Data Center Software.

You can view this information in the Transaction Window as shown below.


Data Center Transaction Window
Figure 2: Data Center Software Transaction Window

Note: You can use the Data Center Software to compare data with other Total Phase tools, such as the Komodo CAN Solo or CAN Duo Interface, as well as our other models of Beagle analyzers.

Additional resources that you may find helpful include the following:

We hope this answers your questions. If you have other questions about our protocol analyzers or other Total Phase products, feel free to email us at, or if you already own one of our devices and have a technical question, please submit a request for technical support.

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