XCP (Universal Calibration Protocol) is a communication protocol used in the automotive industry for measurement, calibration, and diagnostics of ECUs in vehicles. It is specifically designed to provide high-speed and efficient access to measurement and calibration data within ECUs during development, testing, and production processes.

Key features of XCP include:

  1. High-Speed Communication: XCP is optimized for high-speed data transfer, allowing for quick and efficient access to measurement and calibration variables within ECUs. It supports various physical communication layers, including CAN (Controller Area Network), Ethernet, and others.
  2. Flexibility and Scalability: XCP is designed to be flexible and scalable, making it suitable for a wide range of applications and use cases. It can handle different data types, including scalars, arrays, and data structures.
  3. Measurement and Calibration: XCP enables reading and writing of measurement and calibration variables within ECUs. This includes accessing sensor data, adjusting control parameters, and calibrating ECU functions.
  4. Synchronized Data Acquisition: XCP allows synchronized data acquisition from multiple ECUs, providing precise and coordinated measurement data for analysis and diagnostics.
  5. Flash Programming: In addition to measurement and calibration, XCP supports ECU flash programming, allowing for efficient updating and flashing of ECU firmware and software.
  6. Triggering and Stimulation: XCP supports triggering and stimulation mechanisms, which enable the ECU to be triggered to perform specific tasks or measurements at predefined events or conditions.

XCP is widely used in automotive development and testing environments, where it facilitates rapid prototyping, calibration, and validation of ECUs and vehicle systems. It is commonly used in conjunction with other communication protocols like CAN and Ethernet, enabling seamless integration into modern vehicle architectures.

XCP provides a standardized and efficient way for automotive engineers and technicians to access, monitor, and adjust critical parameters and data within ECUs. This helps in improving vehicle performance, optimizing fuel efficiency, meeting emission regulations, and ensuring overall system reliability in modern vehicles.