目 录
摘要 ........................................................................................................................I
ABSTRACT ..........................................................................................................II
第一章 绪论..........................................................................................................2
1.1 单片机抢答器的相关背景...................................................................2
1.2 单片机抢答器的意义...........................................................................2
1.3 抢答器的应用.........................................................................................2
第二章 系统主要硬件及功能介绍....................................................................4
2.1 80C51 特殊功能寄存器 ..........................................................................4
2.2 80C51 单片机的功能 ..............................................................................5
2.3 80C51 单片机 ..........................................................................................5
2.4 抢答器的优点和组成.............................................................................6
2.5 系统的工作流程.....................................................................................7
第三章 硬件电路设计..........................................................................................8
3.1 总体设计..................................................................................................8
3.1.1 总体原理图...........................................................................................8
3.2 按钮输入电路的设计..............................................................................9
3.3 显示电路的设计....................................................................................10
3.4 复位电路的设计....................................................................................10
3.5 时钟频率的设计...................................................................................11
3.6 发声........................................................................................................11
第四章 软件电路设计......................................................................................12
4.1 抢答流程图............................................................................................12
4.2 系统程序................................................................................................13
4.2.1 查询程序....................................................................................14
4.2.1 正常抢答处理程序.....................................................................15
4.2.3 显示程序.....................................................................................16
4.2.4 非法抢答处理程序....................................................................17
4.2.5 犯规抢答程序.............................................................................18
4.2.6 抢答时间调整程序....................................................................18
4.2.7 倒计时程序................................................................................20
4.2.8 发声程序.....................................................................................21
4.2.9 加减时间延时.............................................................................22
第五章 调试及性能分析....................................................................................23
结束语..................................................................................................................24
参考文献..............................................................................................................25