LED大屏幕显示与监控系统
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密 惠 保
摘 要
随着科学技术的快速发展，LED点阵显示技术将在实际生活中的应用越来越广。本文设计了一套16*64点阵数字时钟显示系统，该系统是一种基于AT89S52单片机为核心的低成本、微型化的数字显示系统,它根据人眼视觉暂留原理, 以DS12887为时钟芯片, 应用单片机技术和动态扫描技术来显示时间日期等信息。该系统主要由主控制器模块、实时时间模块、显示扫描模块和上位机模块等四个模块构成。设计利用MC-51单片机系统的I/O口，使用标准RS232串口方式与上位机通信，使用读写外数据存储器方式采集和修改时间数据，使用串口移位寄存器方式将数据循环发送到显示屏，实现了上位机修改时间日期，上位机读取系统时间日期并显示在上位机软件中，上位机控制显示内容，LED动态显示等功能。可实现时间显示，日期显示，闹钟显示，星期显示，时间日期等自动切换显示，文字信息显示等功能。
通过硬件和软件的制作和调试，达到了上位机控制，数字时钟LED显示的预期效果。
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关键词：AT89S52单片机， LED点阵显示，数字时钟，串行通信
[来源：http://www.think58.com]
ABSTRACT
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Along with the science and technology fast development,the LED dot matrix display technology more and more will be in the Real life and technology application .This study introduces a 16 * 64 Dot Matrix Digital Clock Display System based on the AT89S52 single-chip computer as the core low cost and the microminiaturized Digital Display System. The system is based on human visual principle of temporary stay in order for the clock DS12887 chip, single-chip technology applications and dynamic scanning technology to display information such as time and date. The system is mainly includes the main controller module, real-time module, display module and the PC module. This design use the MC-51 single-chip microcomputer system of the I / O port, using a standard RS232 serial communication with the host computer, the use of external data memory read and write methods of data collection and revision of the time, make use of serial shift register circulatory sent data to display, implement the PC changes time and date, PC read the system date and time, displayed on the PC software, the host computer control display, LED dynamic display and other functions. Time and date can be unaided shown, alarm clock shows and week showed at different times , and time and date automatic switching display, text information display function and so on.
[来源：http://www.think58.com]
Through production of hardware and testing of software, achieved the desired effect of the PC control, and LED digital clock display.
[来源：http://www.think58.com]
Key words: AT89S52 Micro Controller Unit，lattice LED’s panel display，Digital Clock，serial communication
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