USB Protocol Analysis

Experiment 19: USB Protocol Analysis

Experiment 19: USB Protocol Analysis

Objective: Capture and analyze USB data packets to understand protocol communication.

Background:

USB (Universal Serial Bus) is a widely used protocol for communication between computers and peripheral devices. Analyzing USB data can help in debugging communication issues and ensuring protocol compliance.

Steps:

  1. Set Up the Analyzer:
    • Connect the USB protocol analyzer to the D+ and D- data lines of the USB device.
    • Ensure the analyzer is configured for the correct USB speed (e.g., Low, Full, or High Speed).
  2. Capture Data:
    • Initiate communication between the host (computer) and the USB device.
    • Use the analyzer software to capture the USB traffic during this interaction.
  3. Analyze Transactions:
    • Decode the captured data to view details like token packets, data packets, and handshake packets.
    • Verify the communication sequence and identify any errors or unusual behavior.

Expected Outcome:

By the end of this experiment, you will understand the structure of USB communication, including transaction types and error detection mechanisms, and will be able to troubleshoot USB communication issues effectively.