【摘要】 针对高校多媒体教学的具体要求,利用LonWorks技术设计开发了多媒体设备监控系统。系统中有两种以Neuron芯片为核心的LonWorks节点--监控节点和并行通信适配器,监控节点采用BitI-O对象,用Neuron芯片的某些I-O引脚用作地址译码以设置通道选择功能,其余I-O引脚用来实现对多种设备的监控;通信适配器采用ParallelI-O对象开发,用来实现监控节点和PC机之间的双向并行通信。两个节点均采用变压器耦合双绞线收发器,通过网络变量交换信息。PC机用来完成系统监控、资源管理、视频播放等多项任务。该系统目前已在多所学校投入使用,运行情况良好,且便于扩展,易于实现与校园网或其他网络的互联。更多还原

【Abstract】 Control systems with LonWorks technology are designed for multimedia classroom devices.There are two kinds of MC143150,nodes-controlling-nodes and parallel-adapter-nodes.The controlling-nodes are developed with Bit I /O object,some I /O pins of which are used for addressing the channel to monitor and control the multimedia devices with other I /O pins.The adapter-nodes are developed with Parallel I /O object for communicating between controlling-nodes and PC.The PC is used for device monitoring and controlling,resource managing and video playing,etc.The control systems ,which have been used in some colleges and schools,are convenient for feature expansion to interconnect with campus-wide and other networks.更多还原