LED_毕业设计1(正文,文献,附录).doc

摘 要 关键词：LED电子显示屏 Abstract This system sets out from the actual application angle and aim at current spread on the market of the multi-function electronics monitor of the applied realm but design creation of LED product, can used for market to lead to buy promote sales to show, news and advertisement show, the station airports number times information show etc.. LED electronics the monitor design a request according to the topic. the hardware part mainly includes STC89 C52 list slice machine system and 16 pieces of ses show that the mold piece constitutes 16*64point, show to drive parts like the electric circuit, keyboard importation controller etc .softwares weaving a distance what to use mainly is a C language .This system can not only carry out number, letter of alphabet, and Chinese characters...etc. to prepare to save a cutting over of information to suggest, but also can carry out an information in fixed time circularly, the top and bottom Be or so to roll to hold, LED show that the bright degree is in a row adjustable, moreover, this system can pass with PC machine communication one PC machine string to show that the information carries on renewal .Pass the design that holds to this LED advertisement, satisfied a design request, carried out the purpose of design. Key words：LED electronics monitor, 64 of 16point, STC89 C52 list slice machine 摘 要 i Abstract ii 1 绪 论 1 1.1 课题背景 1 1.2 LED广告屏 1 2 系统方案设计 3 2.1 LED 广告屏功能的实现 3 2.2 单片机的选型 5 3 硬件设计 6 3.1 系统结构 6 3.2 电路的具体设计 7 4 系统的软件设计 10 4.1 程序设计 10 4.2 字模提取 11 4.3 LED显示方式 11 4.4 串行通信方式 12 5 系统功能测试 12 5.1 测试工具 12 5.2 键盘 12 5.3 单元模块电路 12 5.4 系统整体功能 13 总 结 13 致 谢 14 参考文献 15 附 录 16 附录1控制电路电路图 16 附录2程序 24 附录3 中英文翻译 25 1 绪 论 1.1 课题背景 LED显示屏是从实际应用角度出发，针对当前市场上流行的LED产品的应用领域而设计制作的多功能电子显示屏，可用于学校信息栏、商场导购提示、广告传播、车站航班班次时间资讯显示等。 16行*64列LED电子显示屏根据题目设计要求进行的一个简易设计，硬件部分主要包括STC89C51或89C52单片机系统、16块8*8LED点阵显示模块构成的显示屏、显示驱动电路、键盘输入控制器等部分。本系统不仅能够实现数字、字母、汉字等预存信息的切换显示，同时还可以实现信息的定时循环、上下左右滚屏、LED显示亮度连续可调、另外，本系统可以和PC机通讯，通过PC机串口对显示信息进行更新。 1.2 L