目 录
1.前言 ..................................................................................................................1
1.1 项目背景 .................................................................................................1
1.2 目的意义 .................................................................................................1
2.主要任务 ..........................................................................................................2
2.1 项目概述 .................................................................................................2
2.2 需求分析 .................................................................................................2
2.2.1 功能分析...........................................................................................2
2.2.2 流程分析...........................................................................................3
3.总体设计 ..........................................................................................................4
3.1 功能设计 .................................................................................................4
3.1.1 电子时钟显示...................................................................................4
3.1.2 闹钟响铃...........................................................................................6
3.1.3 整点报时...........................................................................................7
3.1.4 设置时间...........................................................................................8
3.2 界面设计 .................................................................................................8
3.3 硬件设计 .................................................................................................9
3.3.1 中断控制器 8259A............................................................................9
3.3.2 可编程并行接口 8255....................................................................10
3.3.3 定时/计数器 8254...........................................................................10
4.详细设计 ........................................................................................................11
4.1 整体思路 ...............................................................................................11
4.2 实验线路设计 .......................................................................................12
4.3 软件设计 ...............................................................................................12
5.遇到的问题与解决方法 ................................................................................13
6 总结 ................................................................................................................13
7 参考文献 ........................................................................................................14
附录 ...................................................................................................................15
