Design And Development Of Digital Conference Central Control System Host

With the rapid development of digital technology and the wide use ofintegrated circuits and semiconductor technology in automation control,there aremore and more devices need to be controlled at meeting room,command center andsmart home,and the requirements are more and more complex. Not only do we haveto control audio and video equipments, but also some network peripherals. In order tomake these control equipment centralized control, this paper designed and developeda digital conference host the central control system.It greatly improves the workefficiency and control requirements.(1)This paper first analyzes the research background and market demand of theconference of the central control system,then the author studies the developmentsituation of the central control system of the conference center at home andabroad,compares the control system products of the conference,analyzes the technicalcharacteristics and limitations of each product,and introduces the development trendof the central control system of the conference center, at last expounds the maincontents of this paper.(2)The authoer analyzes the function demand and design requirements ofdigital conference control system, then studies the overall structure of the conferencesystem.It is mainly composed by system control host,touch screen, wirelesstransceiver, infrared emission bar, PC application software and external controlequipment, etc. The detailed description of the function and technical parameters ofthe each component is given.(3)According to the requirements and function of the digital conference centralcontrol system host,this paper presents a reasonable framework design and thehardware circuit design.The design adopts the embedded processor S3C6410as themain chip and matches with the programmable logic devices(FPGA) to realize thecore control of the host.The system provides multiple independent programmablecommunication interface, including RS-232interface,RS-485interface, IR interface, IO interface, CAN bus interface, ZigBee interface, ethernet interface, etc.,it isconvenient to realize network control and external control equipment.(4) The design of schematic diagram of digital conference central control systemhost is described in details, and the principle of is analyzed,includeing ZigBeemodule、CAN bus module、RS-485module、IR learning module,etc.(5)The author elaborates on the software platform development and migration ofembedded Linux operating system, analyzes its migration methods and procedures ofthe BootLoader, kernel, YAFFS file system,and then designes a flow chart of the mainprogram of the system. Each module of the application layer software has detailedexplanations,including IR learning modules software design, the Java virtual machinemigration software design, software design of CAN bus module, ZigBee modulesoftware design.The final result of test had show that this project design of digital conferencecentral control system host can effectively achieve expected design requirements. wehad successfully developed the sample monitor,and we put into production.Testresults show that the system is stable and reliable, has good effect, and has broadmarket prospects.