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 ...................................................16
3.3 晶振电路 ...................................................17
3.4 LED 电路的实现..............................................18
3.5 数码管显示电路的实现 .......................................20
3.6 锁存器 .....................................................21
3.7 蜂鸣器 .....................................................22
4.系统的软件设计 ........................................23
4.1 程序编写部分................................................23
4.2 程序流程图：................................................24
4.3 延时的计算 .................................................24
4.4 跑马灯的效果描述 ...........................................25
5.系统调试及结果分析 ....................................27
6.总结和体会 ............................................28
7.遇到问题 ..............................................28
8.参考文献 ..............................................28
9.附录 ..................................................29
9.1 电路原理图..................................................29
9.2 元件清单....................................................29
9.3 程序........................................................30
