基于单片机的多路抢答器设计

.

6.2辑结构图

定时中断服务程序开始 键扫描子

主程序开始 关中断、恢复定时初值 程序开始 开中断、修改计数单元 各控制单 元赋初值 到IS否？ N 是否有键按下？ Y 延时10ms再扫描键盘 N 初始化 Y 置计数初值报警设置 N 调用显 示程序 修改倒计时单元 有键按下否？ Y 扫描键盘暂存键值 调用键盘 扫描程序 倒计时否？ N Y 恢复计时初值并报警 设置键值 闭合键释放否？ N Y 调用键值 处理程序 中断返回 子程序返回 将键值存入键值单元

·7.心得体会

在第一周的时间里，第一天我们完成了用C51实现彩灯设计，包括彩灯花样程序，我设计的花样是L1至L8一次发亮然后再一次熄灭，然后是中断程序设计；定时计数器方波输出、计数程序设计。接下来的三天我们完成了用1602液晶显示器显示本人姓名的拼音字母；用12864液晶显示本人姓名、学号、唐诗一首，要求分两屏，用按键翻页，还完成了用点阵电路显示自己的姓名。在这里，我学会了运用取子模块得到想在液晶显示器上显示的字，这里出现的问题就是相同的拼音的汉字得加以区别，否则程序会无法辨认导致出错。

第二周我的任务是要完成八路抢答器的设计，并完成相应的功能要求。第一天我上网查阅了相关的资料，但是不知道如何用蜂鸣器唱歌，也不知道如何编写歌曲的程序，后来请问了同学，才知道是要将歌的每个音调更改成相应的数码，然后编入程序。本抢答器控制系统具有可靠性高、操作方便等特点，具有一定的运用价值。在本次单片机课程设计中，我们完成了八路抢答器的设计要求及功能。在设计开始前我们对各个模块进行了详细的分析和设计准备工作，设计过程中，我们对KEIL 和Proteus软件有了更深的了

'.

.

解，积极参与完成各个技术实现的难点，从而进一步地熟悉了AT89C51芯片的结构及掌握了各芯片的工作原理和具体的使用方法。通过本次课程设计，让我深刻体会到知识要转化成能力才是力量。与此同时，我们对有关单片机的领域有进一步的了解思路也更加开阔。总之，受益匪浅。这也为自己今后进一步深化学习，积累了一定宝贵经验。撰写课程设计的过程也是专业知识的学习过程，它使我们运用已有的专业知识，对其进行设计，分析和解决问题，把静态知识转化成能力训练。

参考文献

【1】曾屹.刘辉主编. 《单片机原理与应用》[M]. 中南大学出版社. 2012年第2版

【2】臧春华.邵杰.魏小龙主编. 《综合电子系统设计与实践》.[M].北京航空航天大学出 版社2009.11

【3】李华主编.《MCS——51系列单片机实用接口技术》[M].北京航空航天大学出版社 1993.8

程序

#include #define uint unsigned int #define uchar unsigned char uchar Flag; uint a;

uchar code sound[]={0xff,0x39,0x30,0x26,0x30,0x2b,0x30,0x26,0x30,0x2b,0x30,0x2b,0x30,0x26,

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'.

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'.

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'.