Research and software design of high reliability communication of CAN bus ID dynamically configurable on satellite

Based on CAN bus CAN2.0B standard, the structure and characteristics of extended frame arbitration domain and data domain are analyzed, and the principle of dynamic allocation of 29-bit ID in extended frame arbitration domain and high reliable communication in data domain is proposed. By introducing the concepts of device unique identification code (oID), device identification broadcast frame, device identification application frame, device identification permit frame and first frame, two device identification methods and highly reliable communication methods of data domain for establishing communication between satellite computer and electronic control unit (ECU) are proposed. The dynamic variable of arbitration domain ID and highly reliable resolution of data domain are realized in the communication process of CAN bus, which improves the flexibility and reliability of CAN bus communication, and facilitates the unified dynamic management of different ECUs by satellite computer.