嵌入式LED控制系统研究与实现
下载后可任意编辑 DA LIAN UNIVERSITY 大连大学 2024届毕业论文(设计) 题目:嵌入式LED控制系统设计与实现 所在(院系): 信息工程学院 专业 (班级): 自动071班 学 生 姓 名: 舒伟 指 导 教 师: 杜秀丽 评 阅 人 : 任齐 院长(系主任): 裴炳南 嵌入式LED显示系统设计与实现 总计:毕业论文 67 页 表 格 11 表 插 图 23 幅 指导老师 杜秀丽 评 语 人 任齐 完成日期 2011-5-25 下载后可任意编辑 摘 要 LED显示屏以其超大的显示画面、丰富的显示内容、灵活多变的显示方式,逐渐成为国际上显示系统的主流,在显示系统的进展中扮演着越来越重要的角色,广泛应用于车站、金融证券、银行利率、商业广告、文化娱乐等方面,产生了巨大的社会效益和丰厚的经济效益。 目前,大部分显示屏都采纳的8位或者16位微处理器,其数据处理量、运算速度、通信方式相对落后,存在很大的局限性。而随着LED显示屏技术和计算机的进展,LED显示系统需要处理的数据量越来越多,屏幕的刷新频率也越来越高,除此之外还要能够实现与计算机甚至是手机的通信,假如仅靠传统的8/16位单片机处理,很难满足这些要求。 本课题针对目前LED显示屏系统存在的问题,采纳基于ARM核的32位微处理器LPC2210和正文里的不同和FPGA共同作为显示系统的核心,设计了嵌入式LED显示控制系统。ARM作为主控制芯片,FPGA作为扫描单元,这样即解决了单以FPGA为控制芯片时运算和控制能力的不足,又解决了单以ARM为核心控制芯片时处理速度和灵活性的不足。系统设计有局域网接口和SD卡接口,局域网接口方便了系统与计算机及系统之间的数据交换;而SD卡接口可以使系统在没有电脑的情况下也能使用,使系统能在更多场合下使用。 在对显示控制系统软、硬件设计的基础上,对系统进行了调试。调试结果表明系统的刷新频率达到100HZ以上,在降低极少发光效率的情况下刷新频率能达1000Hz。系统采纳千兆以太网技术,能满足1024×768分辨率数据量的传输要求,32位SDRAM图像缓存和2个256KB的RAM显存有效的解决了大屏幕显示时,图像数据传输速率不足的问题。 关键词:ARM微处理器;FPGA;LED显示系统;局域网 - I - 下载后可任意编辑 Abstract LED display with its large display frame, rich display properties, flexible display modes, it has gradually become the mainstream of the international community. In the development of display systems play an increasingly important role. It widely used in railway stations, financial securities, bank, commercial advertising, Culture and Entertainment etc, it has created enormous social and substantial economic benefits. At present, most screens are used in 8-bit or 16-bit microprocessor, their data processing capacity, processing speed, communication mode are all relatively backward, has great limitations. But with the development of LED display technology and computer, the data need to be deal with more and more complex, screen refresh rata is also increasing, in addition, the system also need to can achieve communication with computer even mobile phone, if only rely on traditional 8/16 bit microcontroller, it is difficult to meet these requirement for then current problems in LED display system , this paper use 32-bit microprocessor LPC2148 based on ARM-core and FPGA as the system’s heart. ARM as the main control chip, FPGA as scanning unit heart, this not only solved the lack of operation and control ability, but also solved the lack of the processing speed and flexibility. System designed LAN and SD card interface, LAN interface make data exchange easier between computer and system or system and system, SD card interface allows the system be used in a situation without computer, so the system can be used in more