Body Can Bus System And The Detection Of The Host Computer Software Development

With the development of the modern automobile, the electronic device of automobileincreases rapidly, which brings about the problem that it is necessary for varies of controlsystems to exchange the signals in the real-time. The traditional wiring harnesses can'tsatisfy this development, people turn to the automobile CAN.This paper introduces briefly the development of the automobile CAN all over theworld, and studies the principle and application of CAN-bus which is used widely in themodern automobile. A vehicle body CAN-bus system and an examine software aredeveloped, which takes advantage of the technology progress in the fields such aselectronic and computer. The System has the general functions, which can collect anddisplay the vehicle body's state and information, such as switch information, malfunctioninformation, drive output information. This System will display the vehicle's state inreal-time, and provide a fiat roof form which people can detect and observe all kinds ofinformation of the vehicle body.The system includes two modules: design of the system's hardware, and examinesoftware for the system. MC9S12DJ64 is used for the MCU, which has a CAN controllerinside. The CAN driver uses TJA1050, and the MAX232 is used for the communication inthe system and the computer. The program for the hardware is written by C language. Thecomputer software is design by Visual Basic, the software can read, display and managethe date form the body CAN-bus system.Via the experiment testing the system, the system can accord the requirement andstandard in the end.