Development Of Car Control Center Based On ARM7

With the growing number and function of electrical equipments on a car, the traditional manual keyboard operation cannot meet the need of car drivers and it is very difficult to maintain the good stability and maintainability of the traditional car control system. To solve these shortages, one new car control center system with network interface was developed here to simplify human pannel on car equipments.The new designed car control system was composed of some function modules with network communication. All function modules connected each other by network and held the advantage of flexibility configure.In the system, one control center as the main human-machine interface was designed which has Touch-screen and LCD as input/output devices instead of the traditional buttons to simplify the deivice operation. The hardware platform encored Samsung's S3C44B0X ARM7TDMI, expanded some periphery interfaces to realize communication, input and output function. The communication protocol was CAN bus V2.0 supported by MCP2510 CAN Bus controller.The software platform was composed of three layers structure: Bootloader, operation system, and user module based on MiniGUI middleware. The Bootloader was re-compiled Blob according to the requirement of the car control center. The open-source uClinux was ported to the hardware platform. After analyzing the requirement of the design, MiniGUI middleware was re-configured and compiled.The application software was programmed in C language by adopting the modular design method. All function modules were developed here including the windows control, the chairs control,the light control the air conditioner control and the car DVD control.The control center had advantage of visual, smart, clear human-machine control panel and the system works easily.