智能LED点阵显示屏设计（上位机）

文档编号:DQ098   文档字数:10384,页数:25

摘要
 LED（Light Emitting Diode）显示屏作为一种新兴的显示设备，目前已得到了飞速的发展，广泛应用于高速公路、城市主干道路、证券、体育场馆、舞台等公共场合。LED之所以受到广泛重视而得到迅速发展，是与它本身所具有的优点分不开的。这些优点概括起来是：亮度高、工作电压低、功耗小、小型化、寿命长、耐冲击和性能稳定。LED的发展前景极为广阔，目前正朝着更高亮度、更高耐气候性、更高的发光密度、更高的发光均匀性，可靠性、全色化方向发展。
 LED点阵显示系统，以STC89S54单片机为核心，设计制作出智能化、可更新的LED点阵显示屏；可显示实时年月日和时间，遇到重要的阴历和阳历节日，自动跳出欢度某某节日的祝词，节日范围为2000-2099年。
 LED点阵显示系统，大部分功能通过软件来实现，使电路简单明了，系统稳定性大大提高。本系统不仅成功的实现了要求的基本功能,发挥部分也得到完全的实现,而且有一定的创新功能。 
关键字：单片机；LED；显示屏

Abstract
LED (Light Emitting Diode) display as a new display device, has been the development of rapid, widely used in highway, urban trunk roads, securities, stadiums, arena and other public occasions. LED importance because of widespread and rapid development, with its own advantages as inseparable. To sum up these advantages are: high brightness, low voltage, small power consumption, small size, long life, impact resistance and stable performance. LED very bright prospects for the development, the current is moving in a higher brightness, higher weather resistance, and higher luminous density, higher luminous uniformity, reliability, full color and direction.
LED dot matrix display system in order to STC89S54 single-chip microcomputer as the core of intelligent design can be updated display LED dot matrix; can display real-time date and time face significant lunar and solar calendar of festivals, celebrating the pop-up A message from a certain holiday, holiday in the range of 2000-2099.
LED dot matrix display system, most functional software to achieve, so that the circuit is simple and greatly improved system stability. The system not only achieved the success of the basic functions required to play the part has been fully realized, but also has some innovative features.
Keywords: MCU；LED；Displayer

目 录
摘要 Ⅰ
Abstract Ⅱ
1 绪论 1
1.1 研究课题的提出 1
1.2 LED的发展 1
1.3 LED的特点 2
1.4 LED的价值 3
1.5 LED点阵显示的出现 3
2 系统总体设计 5
2.1 系统总体框图 5
2.2 方案比较 5
2.2.1 显示部分 5
2.2.2 数字时钟 6
2.2.3 芯片的选择 7
2.2.4 74HC595芯片资料 7
2.2.5 串口通讯芯片的选择 9
2.2.6 电源模块 9
3 软件设计 10
3.1 LED的工作原理及点阵原理 10
3.1.1 LED工作原理 10
3.1.2 点阵原理 11
3.2 软件设计语言. 12
3.2.1 VB语言简介 12
3.2.2 VB语言的特点 13
3.3 程序设计流程图 15
3.4 智能LED更新 15
3.4.1 安装软件 15
3.4.2 软件使用方法 17
4 结论 19
致谢 20
参考文献 21
附录 PCB制版图 22

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