The Research On LIN Bus-based Heavy Truck Body Network Systems And FPGA Implementation

With the rapid development of automobile industry and the technology innovation on automotive electronics, the heavy-duty trucks become more energy efficient, more comfortable, safer and more intelligent. There are more and more electronics components and applications on vehicle body leading to be more automated and more intelligent, however, which results in enormous body wiring and complex body network. Therefore, the local interconnect network (LIN) is the preferred standard for auto body network. Compared with traditional design method based on MCU to control LIN network, the proposed application project based on FPGA and IP core can reduce the number of components, PCB complexity and expediently provide the application interface of vehicle. By modifying parameters and customer demands, FPGA module in the design can be reconfigured, which can meet the flexible product design and lower cost.This paper proposes an FPGA-based LIN bus controller. Several LIN bus controllers can be embedded into a single-chip based on the application of IP (Intellectual Property) technology to reduce the number of LIN bus controller and the network size of the vehicle body. The used chip is Spartan3S400of Xilinx Inc. and design procedure is modular Top-down design approach. The design LIN controller IP core consists of the configuration registers module, the divider module, transmit (receive) shift register module and core state module. The function of bus nodes is simulated on the Spartan3S400development board of Xilinx Company. Experiment results show that the design meets the requirements of vehicle LIN bus communication network, the performance of the LIN bus controller turns out to be steady and reliable by analyzing and simulating. Compared with traditional MCU design method, the proposed design significantly improves the hardware resources, hardware size, cost, power consumption and integration, which can be used in green, energy-saving and environmental friendly vehicles in the future.