多路抢答器课程设计报告.doc

课程设计说明书
题目: 多路抢答器设计
二级学院
机械工程学院
年级专业
14级机械设计制造及其自动化
学号
1401210012
学生姓名
曾骏
指导教师
洪云
教师职称
讲师
目录
摘要························································1
一、绪论························································1
1、单片机抢答器的背景·······································1
2、单片机的应用·············································2
3、抢答器的应用·············································3
二、方案设计····················································4
1、总方案设计···············································4
2、基本功能·················································4
3、扩展功能·················································
5
三、硬件电路设计···············································6
1、单片机的选择·············································6
2、各模块设计···············································7
、单片机最小系统········································7
、抢答按键电路··········································8
、显示器电路············································8
、蜂鸣器音频输出电路····································9
四、软件设计··················································10
1、程序设计················································10
2、主程序设计··············································11
五、心得体会····················································12
附录
·················································13
···················································23
六、参考文献····················································24
摘要
此次设计使用AT89C51单片机为核心控制元件,设计一个简易的抢答器,与数码管、报警器等构成八路抢答器,利用了单片机的延时电路、按键复位电路、时钟电路、定时/中断电路等。设计的抢答器具有实时显示抢答选手的号码和抢答时间的特点,而复位电路,则使其能再开始新的一轮答题和比赛,与此同时还利用汇编语言编程,使其能够实现一些基本的功能。
本次设计系统实用性强、判断精确、操作简单、扩展功能强等。它的功能实现是比赛开始,主持人读完题之后按下总开关,则计时开始,此时数码管开始进行1s的减计时,直到有一个选手按下抢答按钮,这时对应的数码管上会显示出该选手的编号和抢答所用的时间,同时该选手的报警器也会发出声音,来提示有人抢答本题。如果在规定的30s时间内没有选手做出抢答,则此题作废,即开始重新一轮的抢答。
关键词:单片机、抢答器、数码管、报警器
一、 绪论
1、单片机抢答器的背景
二十世纪跨越了三个“电”的时代,即电气时代、电子时代和现已进入的电脑时代。这种电脑,通常是指个人计算机,简称PC机。它由主机、键盘、显示器等组成。还有一类计算机,大多数人却不怎么熟悉。这种计算机就是把智能赋予各种机械的单片机(亦称微控制器)。单片机的最小系统只用了一片集成电路,即可进行简单运算和控制。因为它体积小,通常