目 录
前 言 ..............................................................................................1
第 1 章 系统工作原理 .....................................................................3
1.1 功能要求 ..........................................................................3
1.2 基本原理 ..........................................................................3
第 2 章 硬件设计 .............................................................................5
2.1 单片机最小系统单元 ..........................................................5
2.2 霍尔传感器单元..................................................................6
2.3 掉电存储单元 .....................................................................8
2.4 键盘调整单元 .....................................................................9
2.5 显示单元 ...........................................................................10
第 3 章 软件设计 ...........................................................................14
3.1 系统主程序 .......................................................................14
3.2 里程计数中断程序 ............................................................15
3.3 中途等待中断程序 ............................................................15
3.4 计算程序 ...........................................................................17
3.5 显示程序 ...........................................................................18
3.6 键盘程序 ...........................................................................18
第 4 章 调试改进过程及运行结果分析 .........................................21
4.1 动态扫描的调试和分析 ....................................................21
4.2 AT24C02 的编程与调试 ....................................................21
4.3 按键查询功能的实现 ........................................................21
4.4 计算程序的分析与设计 ....................................................22
4.5 结果分析与性能改进 ........................................................23
4.6 计价器系统的仿真 ............................................................23
结 论 ............................................................................................26
谢 辞 ............................................................................................27
参考文献 ........................................................................................28
附 录 A 系统原理图....................................................................30
