摘要
针对教育现代化对多媒体设备需求的不断增加,设计了一套功能全面、经济实用的多媒体教学播放控制系统。以51单片机作为中央控制器,利用RS 485总线将教室终端和节目源设备联合起来,中央控制器接收并执行总控计算机的命令,将节目源分配给不同的终端,各个终端可以对节目源进行远程控制,从而实现多媒体教学系统的集中管理和远程控制,达到辅助教学的目的。另增加备用键盘,以便在发生故障时取代PC机的功能,实现系统保护。
A set of full-featured, economical and practical multimedia teaching playback control system was designed based on the modernization of education for the increasing demand on multimedia devices. Making 51 microcontroller as the central controller, combining classroom terminals with program source equipments by RS485 bus, receiving and implementing the overall control computer commands by the central controller, assigning the program source to different terminals, the program source can be remotely controlled by each terminal, so that multi- media teaching system can achieve centralized management and remote control to support aided teaching. The spare keyboard was prepared to replace the function of PC in the event of failure and realize the system protection.
出处
《现代电子技术》
2010年第12期141-143,149,共4页
Modern Electronics Technique
关键词
中央控制器
终端控制器
节目源控制器
串口扩展
central controller
terminal controller
program source controller
extension of serial port
