目 录
前 言...........................................................................................................................................3
1 系统总体方案设计.................................................................................................................3
1.1 设计内容.......................................................................................................................3
1.2 设计要求.......................................................................................................................4
1.3 设计思路及描述...........................................................................................................4
2 系统硬件电路的设计.............................................................................................................5
2.1 AT89C51 单片机简介...................................................................................................5
2.1.1 AT89C51 提供的标准功能 .............................................................................5
2.1.2 AT89C51 引脚功能 .........................................................................................5
2.2 晶振与复位电路...........................................................................................................8
2.3 显示电路.......................................................................................................................9
2.3 按键.............................................................................................................................11
3 系统软件结构设计...............................................................................................................12
3.1 主程序设计.................................................................................................................12
3.2 定时器 T0 中断服务程序 ..........................................................................................12
结 论.......................................................................................................................................13
参考文献...................................................................................................................................13
谢 辞.........................................................................................................................................14
附 录.......................................................................................................................................15