2013年毕业论文_范文带注释

XXX 学院

毕业设计报告(论文)题目:

二号宋体（粗体）居中

题目较短的用一行删第二行线

所属系专

学

姓业号名电子工程系电子信息工程xxxxxx 东南大学成贤学院指导教师起讫日期设计地点无页脚

基于单片机的数字时钟的原理与制作

摘要

小三号宋体（粗体）居中

单片机在数字时钟中的应用已是非常普遍的，由单片机作为数字钟的核心控制器，可以通过它的时钟信号实现计时功能，将其时间数据经单片机输出，利用显示器显示出来。通过键盘可以进行校时、定时等功能。输出设备显示器可以用液晶显示技术和数码管显示技术。

本次设计是利用单片机实现具有计时、校时、整点报时等功能的数字时钟，是以单片机AT89C51为核心元件同时采用LED 数码管显示器动态显示“时”，“分”，“秒”的现代计时装置。本文详细阐述了单片机和LED 数码显示器的内部结构，系统硬件电路和软件程序的设计及调试过程，同时给出了原理图、流程图等。涵盖了从需求分析，系统设计，编程，原理图，PCB图以及最后的试验板焊制等产品开发的基本过程。

关键词：单片机AT89C51数字时钟LED 数码管显示器

学习word 排版技巧，

插入-分隔符-分节符-下一节分节

视图-页眉页脚-断开链接到前一个才能使得前后节不影响

罗马数字页脚第一页

Principle and production of digital clock based on

Single Chip Microcomputer

Abstract

Single Chip Microcomputer is already very common in the application of digital clock, as the core controller of a digital clock, SCM can achieve the function of timing via its clock signal. And its time data can be exported via SCM and displayed by the monitor. Keyboard can achieve the function of timing and clocking, to name just a few. The Liquid-crystal display technology and Digitron display technology can be applied in the output device monitor.

This design is utilizing the SCM to produce the digital clock with the functions of clocking, timing, announcing the time on the hour and so on. It is a modern timing device, among which the SCM AT89C51is the core element. Meanwhile, LED digitron monitor dynamically display the “hour”“minute”“second”.This dissertation elaborates the interior structure, system hardware circuit and the process of software program ＇s design and debug of SCM and LED digitron monitor in detail. Meanwhile, schematic diagram and flow chart are also provided.It contains the basic process of requirement analysis ,system design,SCM programming , schematic diagram, PCB chart and final welding of the board which forms a complete procedure for product manufacture.

Keywords:Single Chip Microcomputer AT89C51；digital clock ；LED digitron monitor

Word 排版技巧，自动生成目录

摘要............................................................................................................................................................................. I Abstract........................................................................................................................................................................ II

第一章引言............................................................................................................................................................ 1

第二章单片机简介.................................................................................................................................................... 2

2.1单片机的概念及其特点............................................................................................................................... 2

2.1.1单片机的概念..................................................................................................................................... 2

2.1.2单片机的特点.................................................................................................................................... 2

2.2单片机的发展................................................................................................................................................ 3

2.2.1单片机的发展历史............................................................................................................................ 3

2.2.2单片机的发展趋势............................................................................................................................ 4

2.3单片机的应用............................................................................................................................................... 5

第三章数字时钟系统的构成.................................................................................................................................... 6

3.1数字时钟的构成........................................................................................................................................... 6

3.2AT89C51的单片机简介................................................................................................................................3

3.2.1主要性能............................................................................................................................................. 6

3.2.2引脚说明............................................................................................................................................. 7

3.2.3芯片擦除............................................................................................................................................ 9

3.3LED 数码显示器简介................................................................................................................................. 12

3.3.1LED 数码显示器的结构与原理...................................................................................................... 12

3.3.2LED 数码显示器显示方式.............................................................................................................. 13

第四章数字时钟系统的总体设计.........................................................................................................................15

4.1系统功能介绍.............................................................................................................................................. 15

4.2系统方案设计.............................................................................................................................................. 15

4.3系统硬件电路的设计.................................................................................................................................. 15

4.4系统软件程序的设计.................................................................................................................................. 16

4.4.1主程序............................................................................................................................................... 16

4.4.2LED 显示模块.................................................................................................................................. 16

4.4.3定时器/计数器T0中断服务程序.................................................................................................. 16

4.4.4T1中断服务程序..............................................................................................................................17

4.4.5按键处理模块.................................................................................................................................. 17

第五章调试及性能分析.......................................................................................................................................... 18

5.1硬件调试..................................................................................................................................................... 18

5.2软件调试..................................................................................................................................................... 18

5.3性能分析..................................................................................................................................................... 18

第六章结论............................................................................................................................................................ 19

致谢...................................................................................................................................................................... 20

参考文献.................................................................................................................................................................... 21

附录一C 语言源程序................................................................................................................................................22

附录二电路原理图.................................................................................................................................................. 30附录三PCB 印刷版图……………………………………………………………………………………………31

此例页数偏少，一般40-50页左右。

罗马数字页脚第末页

第一章引言

小三号宋体（粗体）居中

1.1单片机的概念小四号宋体（粗体）居左

1.1.1单片机的组成小四号宋体（粗体）居左

xxx

1.2单片机的特点

新的一章另起一页。章前留一点余地，不要紧贴横线

第二章单片机简介

小三号宋体（粗体）居中

2.1单片机的概念及其特点小四号宋体（粗体）居左

2.1.1单片机的概念小四号宋体（粗体）居左

单片机是一种集成电路芯片，采用超大规模集成电路技术把具有数据处理能力（如算术运算、逻辑运算、数它们之间相互联系的结构框图如图1.1所示。ROM

CPU RAM

定时器/

时钟计数器I/O接口

图1.1单片机结构框图图名五号宋体

2.1.2单片机的特点

2.2单片机的发展

2.2.1单片机的发展历史

2.2.2单片机的发展趋势

2.3单片机的应用

第三章数字时钟系统的构成

3.1数字时钟的构成

3.2AT89C51的单片机简介

3.2.1主要性能

表3-1AT89C51的P3口的第二功能

表格名用五号宋体（粗体）；

表格文字用小五宋体，居中（或居左）并整齐划一；端口引脚

P3.0

P3.1

P3.2

P3.3

P3.4

P3.5

P3.6

P3.7第二功能RXD（串行输入口）TXD(串行输出口)INTO （外中断0）INT 1（外中断1）T0（定时/计数器0）T1(定时/计数器1) WR (外部数据存储器写选通)(外部数据存储器写选通)

第六章结语

6.1系统设计方面的局限性

6.2系统功能的拓展方向

致谢

、

不要和致谢放到一页，另起新页

参考文献

半角模式的中括号

[1]谢维成，杨加国．（shift +space）切换到全角模式的点号单片机原理与应用及C51程序设计[M]半角模式的中括号．清华大学出版社，2006

[2]李光飞,楼然苗.单片机课程设计指导[M].北京航空航天大学出版社,2005

[3]彭为,黄科,雷道仲.单片机典型系统设计实例精讲[M].电子工业出版社,2006

[4]胡耀辉,朱朝华.单片机系统开发实例经典[M].冶金工业出版社,2006

[5]刘朋.Protel99SE 自学手册—实例应用篇[M].人民邮电出版社, 2008

数量十篇左右

附录一C 语言源程序

/***********************************************************/

//数字时钟的设计采用AT89C51，12MHz晶振P1口输出段码，P2口作8位共阴数码管列扫描用

//key0接P3.2，为调时位选用；key1、key2接P3.3、p3.4,分别为加1、减1键//整点报时功能：1点响1声，2点响2声，以此类推，但报时时不走时，有待改进/************************************************************/

#include"reg51.h"

#definechar unsigned char

char code dis_7[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00};码表

char code scan_con[6]={0x80,0x40,/*0x20,*/0x10,0x08,/*0x04,*/0x02,0x01};char data timedata[6]={0x00,0x00,0x00,0x00,0x00,0x00};

char data dis[6]={0x00,0x00,0x00,0x00,0x00,0x00};

char data temp=10;

char data con1s=0x00;

char data con04s=0x00;

char data con=6;

sbit key0=P3^2;

sbit key1=P3^3;

sbit key2=P3^4;

sbit buz=P3^7;//列扫描控制字//共阴LED 段

/******************1ms延时函数*******************************/

delay1ms(intt)

{

int i,j;

附录二电路原理图

附录三PCB

印刷版图

所有格式以绿皮书为准