目录
摘要 ......................................................................1
Abstract ..................................................................2
1 绪论.....................................................................3
2 系统设计.................................................................3
2.1 系统组成 ...........................................................3
2.1.1 计费及显示 .....................................................3
2.1.2 时钟及显示 ......................................................4
2.1.3 计费开始提示 ....................................................4
2.2 功能模块设计 .......................................................4
3 硬件及软件实现...........................................................5
3.1 传感器 ..............................................................5
3.1.1 光电传感器电路设计 .............................................5
3.1.2 车轮光电开关检测电路.............................................6
3.2 单片机 .............................................................7
3.2.1 8051 单片机功能方块图 ..........................................7
3.2.2 AT89S51 单片机简介.............................................10
3.2.3 AT89S5l 与 51 系列单片机相比具有如下特点........................10
3.2.4 89S51 的内部框图...............................................11
3.2.5 中断控制 ......................................................13
3.2.6 单片机控制程序设计 ............................................14
3.2.7 单片机汇编语言源程序 ..........................................18
3.3 显示及按键控制系统..................................................30
3.3.1 LED 数码管.....................................................30
3.3.2 数据显示电路的设计 ............................................31
4 系统检测及分析..........................................................32
4.1 系统仿真/硬件验证 .................................................32
4.1.1 系统的调试方法 ................................................32
4.1.2 系统的硬件验证 ................................................32
4.2 设计技巧分析 .......................................................33
谢辞 .....................................................................36
参考文献： ...............................................................37
