I2C Protocol Analysis

Experiment 5: I2C Protocol Analysis

Experiment 5: I2C Protocol Analysis

Objective: Analyze I2C communication between devices to understand master-slave interactions, data transmission, and protocol structure.

Steps:

  1. Connect the Logic Analyzer to SDA and SCL Lines:
    • Identify the SDA (data) and SCL (clock) lines on the I2C bus.
    • Connect the logic analyzer probes to these lines and ensure a proper ground connection.
    • If multiple devices are on the bus, verify the pull-up resistors are in place for proper signal integrity.
  2. Configure the Software to Decode I2C Signals:
    • Launch the logic analyzer software and select the I2C protocol decoder.
    • Set the appropriate parameters, such as clock speed (e.g., 100 kHz, 400 kHz) and address mode (7-bit or 10-bit).
    • Start capturing data and observe the waveform for the clock and data signals.
  3. Analyze Data Frames and Addresses:
    • Inspect the captured data frames to identify start and stop conditions.
    • Verify the slave addresses, data bytes, and acknowledge bits to ensure proper communication.
    • Check for errors, such as missing acknowledgments or bus contention.

Expected Outcome:

By the end of this experiment, you will understand the structure of I2C communication, including address and data frame formats, and gain practical experience in debugging I2C interactions between master and slave devices.