课程设计报告-- 抢答器的设计

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1、电气与电子信息工程学院单片机应用系统设计与制作设计题目：　抢答器的设计　　专业班级：电气自动化技术2011级（1）班学　　号：　　　　8　　　　　姓名：陈俊清指导教师：陶彪李玉平设计时间：2013/5/13～2013/5/25设计地点：K2—30629单片机应用系统设计与制作课程设计成绩评定表姓名陈俊清学号8专业班级电气自动化技术2011级（1）班课程设计题目：八位抢答器的设计与制作课程设计答辩或质疑记录：1、如何对按钮的信号进行检索?有两种方法可进行选择：<1>当有按键按下时，与被按键相连的I/O线将得到低电平输入，其他按键的输入线均为高

2、电平，经过消除抖动后，逐个搜索P1.0~P1.7判断是哪个按键被按下。此方占用系统资源效率低不采用。<2>通过中断方式处理键盘，在中断服务程序中先消除抖动，再对各键进行查询，找到按键，转到相应的处理程序中。系统资源占用少，精确，不易出错，本次试验采用这种方法。2、如何用数码管显示数据？利用P0口做段选码口输出/P2低三位做位选码输出，并且而通过查表的方式来输出所要显示的数剧成绩评定依据：实物制作（20％）：课程设计考勤情况（10％）：课程设计答辩情况（20％）：完成设计任务及报告规范性（50％）：最终评定成绩（以优、良、中、及格、不及格评定

3、）指导教师签字：年月日29目录第一部分课程设计任务书1、课程设计任务书·············································3第二部分课程设计一、方案论证1、设计任务与要求··············································52、方案论证····················································5二、硬件设计1、复位电路···················································

4、·62、稳压电源电路················································73、外部震荡电路················································74、报警电路····················································85、选手抢答电路················································96、时间调整电路·································

5、···············9297、显示与显示驱动电路·········································10三、设计框图1、抢答器电路框图·············································102、系统主程序设计·············································11四、设计电路图1、总电路·····················································13五、软件仿真1、keil程序仿真

6、···············································142、protues仿真················································14六、实物图1、启动电路···················································192、抢答计时···················································203、一号选手抢答································

7、···············214、四号选手违规抢答···········································22七、总结1、实验总结···················································2329八、附录1、参考文献···················································232、程序·······················································243、元件清单······

8、·············································29第一部分课程设计任务书2012～2013学年第2学期学生姓名：陈俊清专业班级：电气自