单片机操控LED点阵显示器的设计(附程序,原理图,PCB图)(任务书,开题报告,中期报告,外文翻译,论文12500字)
Controlled LED dot matrix display
摘 要
随着社会日益快速的发展, LED character electronics screen is ardently loved by people. Display shows the electronic indispensable part of the file. Serial output LED electronic display is a new information display media, set electronic technology, photonics technology, computer technology, information processing technology, and its colorful, using a wide range of high brightness, long life, stable and reliable, widely used in commercial advertising, stadiums, ports or airports, bus terminal, highway, press releases, securities trading and so on. Led display using light emitting diode dot matrix modules consisting of a large area or pixel display modules, adaptable to the environment, high cost performance, using low cost, in just 10 coming in, quickly becoming the area of flat panel display mainstream products, is currently the intemational media, one of the more advanced display.
This thesis described the intelligence Chinese characters for machine AT89S52 constituting of applied single slice to show to hold the constituting of main function, hardware with the software's design. The function of that system passes to plait machine of single slice the procedure as to it's the p1, p3 proceeds to serial output, then pass move the octal bus transceiver to proceeds the output's signal to enlarge, and make use of the diode again single to close or to electrical conductivity. It is strong that it is reliable, operates flexibility, function that the whole systematic structure is compact, simple and the ratio of performance to price is high, which have satisfied modern agricultural production and need of scientific research better.
Key Words: LED character electronics screen;one-chip computer AT89S52;octal bus transceiver 74ALS245
目 录
1引言 1
2单片机简介 2
2.1单片机的发展历史及其分类 2
2.2单片机的结构特点 4
2.3MCS-52单片机芯片内部逻辑结构 4
3硬件系统设计 5
3.1将要实现的功能要求 5
3.2方案论证 6
3.3系统硬件电路的设计 7
3.4主要芯片介绍 8
3.4.1 正向驱动器74LS245及其应用 8
3.4.2 4-16线译码器 10
3.4.3 32×16LED点阵显示屏 11
3.4.4 系统中心单片机部分—AT89S52 12
4软件设计 19
4.1刷新频率的计算及驱动程序流程图 19
4.2系统主程序流程图 20
5调试及性能分析 21
结 论 23
参考文献 24
附录1:原理图 25
附录2:程序源代码 26
附录3:单片机操控板PCB图 35
附录4:英文资料及中文翻译 36
致 谢 45