目录
课程设计正文 ...........................................................................................................2
一 系统工作原理 ...................................................................................................2
1.1 功能说明 ....................................................................................................2
1.2 基本原理 ....................................................................................................2
二 硬件设计 .............................................................................................................3
2.1 单片机 ........................................................................................................3
2.2 复位电路 ....................................................................................................4
2.3 晶振电路 ....................................................................................................4
2.4 键盘调整单元 ............................................................................................5
2.5 数码管与三极管显示 ................................................................................6
三 软件设计 .............................................................................................................7
3.1 系统主程序 ................................................................................................7
3.2 中断程序 ....................................................................................................7
3.3 显示函数 .....................................................................................................7
3.4 键盘扫描程序 .............................................................................................8
3.5 时钟实现的基本方法 .................................................................................8
四 心得体会 .............................................................................................................8
� 附录 源程序 ....................................................................................................9
