论文——单片机数字钟

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1、单片机数字钟论文单片机数字钟论文目录前言摘要一概述···················································3二设计思路···············································42.1LCD时钟的简单功能说明································42.2思路说明··············································42.3设计的控制电路········································4三硬件设计······

2、········································63.180C51芯片的简单介绍·································63.1.1时钟电第44页单片机数字钟论文路············································73.1.2复位电路············································73.2LCD芯片·············································83.3按键控制·······················

3、·······················11四软件设计···············································134.1中断系统··············································134.2定时/计数器···········································144.3子程序设计··········································164.3.1初始化变量子程序·····································164.

4、3.2中断控制子程序······································164.3.3初始化定时器子程第44页单片机数字钟论文序··································184.3.1设置时间子程序······································194.3.2显示数据子程序······································204.3.3对按键进行说明及程序中的定义························214.4主控制程序流程图······················

5、··············21五主控制程序清单········································23结束语·····················································36参考文献···················································37附录······················································38第44页单片机数字钟论文前言今天，传统的电子系统已经全面转变成以嵌入式系统为核心的现代电子系统，在嵌入式系统底

6、端应用中，存在着大量的小型嵌入式应用系统；这些系统用于资源和控制要求的限制，采用汇编语言设计程序会成为系统程序设计的一种主要方法。在汇编语言为基础的系统程序设计中，规范化设计至关重要。遵循汇编语言编写格式，规范和计算机软件的工程方法。在系统程序设计中，也要从单纯的功能性设计变到能性、可靠性和产品应用优化等综合性设计充分发挥软件在提高系统综合品质上的效益，近几十年来，单片机在生产过程控制、自动检测、数据采集与处理、科学计算、商业管理和办公自动化等方面获得了广泛应用。单片机具有体积小、重量轻、耗能省、价格低、第44页单片机数字钟论文可靠性高和通用灵活等优点。而本次设计的带单片机的LCD

7、时钟也随着单片机的发展被人们所认识与应用并逐渐成为必不可少的必需品，被广泛应用于个人家庭以车站、码头、剧院、办公室等公共场所，给人们的生活、学习、工作、娱乐带来了极大的方便。虽然现在市场上已经有现成的LCD时钟电路的集成芯片出售，价格合理，使用方便，但是这里介绍的自制带单片机的LCD时钟可以满足使用者的特殊要求，输出方式灵活，如可以随意设置时、分、秒的输出等等。由于单片机技术的发展，特别是80C51芯片技术的发展，使LCD时钟具有体积小，耗电省，计时准确，性能稳定，维