XCP (Universal Measurement and Calibration Protocol) is a master/slave protocol used for developing and calibrating embedded systems, particularly in the automotive industry. It allows a development tool (the master) to access and modify memory locations within an electronic control unit (ECU) or other embedded device (the slave) while it's running. This facilitates tasks like measuring internal variables, adjusting calibration parameters (e.g., fuel injection timing), and flashing the ECU with new software. It's commonly used in conjunction with tools like CANape and INCA.
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