LED显示屏的计算机远程控制系统.doc

中北大学信息商务学院2011届毕业设计说明书 LED显示屏的计算机远程控制系统 摘要 本文研究的是基于51单片机的LED显示屏控制技术，提出了一种基于RS-485总线的双向主从分布式远程多机LED显示屏控制系统。上位机通过串行端口为下位51单片机发送控制命令和要显示的字符信息，实现对多块显示屏的远程监控及显示内容的动态刷新;下位单片机通过字模芯片把字符信息转化为字模信息，然后通过行驱动器、列驱动器可将字符通过LED显示屏显示出来;，并可通过终端上的键盘向上位机进行信息反馈。 综合单片机、网络通信技术、远程视频技术，提出了一种基于RS-485总线的主从分布式远程LED显示屏控制系统，可实现对多显示屏的远程监控及显示内容的动态刷新，并可将显示内容在PC机上进行预览。介绍了该系统的总体设计方案、软硬件构成，并详细阐述了多LED显示屏的远程通信原理及实现方法。 关键词： LED显示屏, 主从分布式系统, RS-485总线 LED display of the computer remote control system Abstract This paper discusses the technology of the LED lattice display system based on51microcontroller and developer a bidirectionalmaster/slave distributed multimachine long-range communication LED lattice displaycontrol system based on the RS-485 bus. The PC transmits the instructions and displayscode to AVR microcontroller, and all these instructions and display code must be pass the serial port.It can simultaneously monitor and control many LED lattice display system distributed in different distant places and dramatically refresh their display contents. The Amicrocontroller conveys the contents into matrix using matrix chip,and drives the row driver and column driver to display these matrix by form of LED lattice,and feedback the information by keyboard in the terminal.This LED lattice display system develop the traditional LED display system in witch only does the PC transmit the code to AVR microcontroller into PC and microcontrollers can communicate each other.It fills the blank of the domestic market,and expand the space of the LED system. By applying such techniques as single chip microcomputer, network communication and long-range vision, a master/slave distributed long-range LED display control system based on the RS-485 bus has been developed. It can simultaneously monitor and control many LED displays distribu