微机原理与单片机技术实践课程设计基于AT89C52的1664LED点阵的设计.doc

韶 关 学 院 课 程 设 计 课程设计题目：微机原理与单片机技术实践课程设计 ——基于AT89C52的16*64LED点阵的设计 学生姓名： 学 号： 院（系）：物理与机电工程学院自动化系 专 业：自动化 班 级：2008级本科1班 指导教师姓名及职称： 起止时间： 2011年3月至2011年5月 基于AT89C52的16*64LED点阵的设计 摘 要: LED是指发光二极管，在某些半导体的PN结中，注入的少数载流子与多数载流子复合时会把多余的能量以光的形式释放出来，从而把电能直接转换为光能。PN结加反向电压，少数载流子难以注入，故不发光。这种利用注入式点知发光原理制作的二极管叫发光二极管，简称LED。由于电子显示屏制作简单，安装方便，被广泛应用于各种公共场合，如公交汽车的报站器、广告屏以及公告牌等等。介绍的LED点阵电子显示屏，其功能有固定汉字、字母、数字的显示；平行左移、右移；固定信息的循环显示；显示屏的亮度连续可调；时间的显示和上位机对显示内容可修改的功能 随着LED显示屏在广告传媒领域逐渐崭露头角，其控制系统也如雨后春笋，层出不穷。由于他的控制系统均是基于嵌入式处理器开发，所以单片机在其中也占有一席之地。但是，由于LED显示屏控制较复杂，特别是对于显示特殊效果，如循环移动、覆盖霓虹灯效果，要求处理器运算速度快、执行效率高， 关键词：AT89C52 74HC154（行驱动器） 74HC595（列驱动器） 16*64点阵 LED Based on AT89C52 the 16 * 64 LED dot matrix design Pick to: LED refers to light-emitting diodes that in some of the semiconductor PN junction, injection of minority carriers and majority carrier will take extra energy compound in the form of light energy released, which directly convert light energy. PN junction, minority carriers with reverse voltage to infuse, reason not to shine. This kind of use between points made luminous principle known as light-emitting diodes (leds), called diode LED. Because electronic display screen making simple, convenient installation, widely applied in all kinds of public occasions, such as the transit buses stops device, advertising screen and bulletin boards, etc. Introduction of LED dot matrix electronic display screen, its function has the fixed characters, letters, and digital display; Parallel moves left, right shift; Fixed information circulation display; Screen brightness continuous adjustable; Time displays and PC for display content can be modified to function As the LED display in advertising media field, the control system of up-and-coming also have mushroomed, emerge in endlessly. Because of his control system based on embedded processors are developed, so microcomputer in which also occupies a place. However, because the LED display control is more complex, especially for show special