毕业设计：基于ARM的以太网LED显视屏控制器研究.doc

编号 论文 题目： 视屏控制器研究 物联网工程 学院 学 号 学生姓名 指导教师 二〇一一年月 摘 要 关键词：32位ARM微处理器;ARM汇编语言;串行通信;LED显示系统 ABSTRACT With the rapid development of high technology in information age，people are more and more eager to obtain all kindsof information and display them in time.Therefore it brings the rapid development of information carner.Lighte emitting diode(LED) disPlay system is an important kindof information carrier．. Now，8-bi or 16-bit mieroproeessors are often used for the control of all kinds of large LED display sereen，but beeause of some problems existed in these mieroproeessor system such asrunning speed，ability to address and Power depletion，ete，In some complex oeeasions，it is diffieult to satisfy large display area and the eontents of displays switched frequently，aimming at the problems exists in large LED sereen display system，relating to the advanced products of microproeessor，control technology and communication technology，we adopted the new generation32-bite embedded RISC mieroProeessor based onARM to constitute the former leveldriving eireuit，and PC isused to manage and control for the latter level，so this paper can form the disPlay system easily which made up of many pieces of large LED sereen display，compared with the traditional LED disPlay system basedon 8-bit or 16-bit SCM，this systemcan Support steady display with bigger visible while no obvious inerease on costs，at the same time，it can store more displa contents．. This reseach has mainly accomplished the content as following:Accomplish the whole design of large LED display system basedon32-bitARM microprocessor,choosing the appropriate type of the main chip and analyzing the strueture and the operation method of the chips；Design the Power eireuit,crystal-vibration circult and the reset cricuit based on ARM mieroproeessor system，futhermore，completing the design of the systematic expansion based on LPC2478，including mairily the expansion of the memoriz