目录
1．绪论..............................................................................................................................................4
2.电路设计方案及功能分析............................................................................................................5
2.1 设计目的....................................................................................................................................5
2.2 设计要求............................................................................................................................5
2.3 系统基本方案选择和论证................................................................................................5
2.3.1、STC89C52RC 介绍.................................................................................................6
2.3.2、时间周期............................................................................................................11
2.3.3、LED 灯管.............................................................................................................12
2.3.4、数码管................................................................................................................12
2.3.5、蜂鸣器................................................................................................................12
2.3.6、锁存器................................................................................................................13
2.4 系统框图..........................................................................................................................13
3.系统的硬件设计与实现...............................................................................................................14
3.1 电源供电模块的实现......................................................................................................14
3.2 复位电路.............................................................15
3.3 晶振电路.............................................................16
4. 系统的软件设计......................................................................................................................19
4.1 软件介绍...........................................................................................................................19
4.1.1 Keil C51 ..................................................................................................................19
4.1.2 Protel99SE ..............................................................................................................20
4.1.3 Proteus.....................................................................................................................21
4.2 程序流程图 ...........................................................22
4.3 延时的计算...........................................................23
5.系统调试及结果分析...................................................................................................................24
6.总结和体会...................................................................................................................................24
7. 遇到问题.....................................................................................................................................24
8.参考文献.......................................................................................................................................25
9.附录...............................................................................................................................................25
9.1 电路原理图： .........................................................25
9.2 元件清单.............................................................26
9.3 程序 .................................................................27
