The Development Of Controller Of Call System

As one of our country's pillar traditional industries, railway's development not only affects China's international competitiveness, but also closely related to people's daily lives. At the same time, with the continuous development of science and technology in recent years, the scope of application of computer technology becomes more and more widely. Combines Computer technology with other technologies has become a trend in information society. Therefore, it's necessary to apply the current advanced computer technology to the railway industry and achieve information management.Based on the current Call System of Railroad Apartment, and combined with current embedded technology, modern means of communication and railway apartment management model, we create an advanced Controller of The Call System. It can not only effectively improve the efficiency and quality of the Railway Call System, but also greatly reduced the labor intensity. The Railway Call System consists of three parts:PC machine, the controller host and client machines. The controller is based on powerful, highly integrated, and digital-analog mixed signal processing MCU C8051F120. The host and client machines were connected with only two wires, not only simple in structure, but also enhance reliability and reduce costs. In addition, the controller has three control modes:PC control, control panel control and remote phone control. These three control methods can be run independently, so if an unexpected accident occurred in one control mode, you can control the system in another way, significantly improved the reliability of the system.This paper mainly focuses on the communications and hardware design of the system. Firstly, we described the current Railway Call System's background and put forward our solutions; then with the system's requirements, we determined the system's hardware architecture, and selected our hardware and software development platform; after that, we decided the communication way between the host and client machines, and did several experiments to make sure of it; At last, we carried out a detailed system hardware design, and discussed some key technologies of system.