论文——片机数字钟.doc

单片机数字钟论文 目录 前言 摘要 一 概述 ···················································3 二 设计思路 ···············································4 2.1 LCD时钟的简单功能说明 ································4 2.2 思路说明 ··············································4 2.3 设计的控制电路 ········································4 三 硬件设计 ··············································6 3.1 80C51芯片的简单介绍 ································· 6 3.1.1 时钟电路 ············································7 3.1.2 复位电路 ············································7 3.2 LCD芯片 ············································· 8 3.3 按键控制 ··············································11 四 软件设计 ···············································13 4.1 中断系统 ··············································13 4.2 定时/计数器 ···········································14 子程序设计 ·········································· 16 初始化变量子程序 ·····································16 中断控制子程序 ······································16 初始化定时器子程序 ··································18 设置时间子程序 ······································19 显示数据子程序 ······································20 对按键进行说明及程序中的定义 ························21 4.4 主控制程序流程图 ···································· 21 五 主控制程序清单 ········································ 23 结束语 ····················································· 36 参考文献 ··················································· 37 附录 ······················································ 38 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、、、、、、、、、 带单片机的LCD时钟 摘要：单片微型机算计俗称单片机，是一种运用十分广泛的微处理器。在各种称为计算机控制的仪器和设备中的计算机控制都是用单片机来实现的。本任务是采用单片机控制技术来实现对LCD时钟的控制，基于单片机的定时和控制装置的应用，是数字钟最为基本的应用。在基本的单片机系统和外围电路外，还要有外部的控制和显示装置，是对单片机的定时器、中断、LCD显示和键盘的使用方法。 关键字：LCD；单片机；定时器；中断 Control LCD time by the single chip Abstract：The single chip Micyoco,common saying SCM.It is a sort microprocessor be used so widely.In th