多路抢答器课程设计报告讲解.docVIP

多路抢答器设计 PAGE 23 - 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 2.1、单片机最小系统········································7 2.2、抢答按键电路··········································8 2.3、显示器电路············································8 2.4、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 1.程序清单·················································13 2.硬件图···················································23 六、参考文献····················································24 PAGE 23 - PAGE 1 - 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