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目 录
1 课题综述..............................................................................................................................1
1.1 课题来源 ..............................................................................................................................................1
1.2 课题意义 ..............................................................................................................................................1
1.3 项目目标 ..............................................................................................................................................1
2 系统设计 .............................................................................................................................1
2.1 框图设计 ..............................................................................................................................................1
2.2 知识点 ..................................................................................................................................................2
2.2.1 单片机的时钟电路..................................................................................................................................................2
2.2.2 单片机复位电路工作原理......................................................................................................................................2
2.2.3 单片机晶振电路工作原理......................................................................................................................................3
2.2.4 按键电路的设计......................................................................................................................................................5
2.2.5 蜂鸣器驱动电路设计...............................................................................................................................................5
2.2.6 数码管特性及使用..................................................................................................................................................5
2.2.7 AT89S52 单片机引脚 ..............................................................................................................................................6
2.2.8 集成块 74LS06 的使用 ............................................................................................................................................7
3 硬件设计 ...............................................................................................................................7
3.1 电路原理图 ..........................................................................................................................................7
3.2 硬件连线 ..............................................................................................................................................8
4 软件设计 ...............................................................................................................................8
4.1 软件流程图 ..........................................................................................................................................8
4.2 程序代码 ..............................................................................................................................................9
5 系统仿真与调试 .................................................................................................................11
5.1 硬件调试 ............................................................................................................................................11
5.2 软件调试 ............................................................................................................................................11
总结 .........................................................................................................................................13
参考文献 .................................................................................................................................14