多功能出租车计价器.doc

多功能出租车计价器

目 录

 引 言·································································· 1
1. 1  出租车计价器概述········································································· 1
1. 2  本设计任务··················································································· 1
  1.2.1  设计任务················································································· 1
  1.2.2  设计要求················································································· 1
1. 3  系统主要功能···············································································  2
 出租车计价器硬件设计················································· 3
　　　2.1 系统的硬件构成及功能···································································· 3
　　　2. 2  AT89S51单片机及其引脚说明·························································· 3
　　　2.3  AT24C02引脚图及其引脚功能··························································· 6
　　　2. 4  AT24C02 掉电存储单元的设计·························································  6
　　　2.5  里程计算、计价单元的设计····························································· 7
　　　2.6  数据显示单元设计·········································································· 8
 系统软件设计···························································10
　　　3. 1  系统主程序设计············································································ 10
3. 2  定时中断程序设计········································································ 10
3. 3  里程计数中断服务程序设计···························································· 10
3.4  中途等待中断服务程序设计···························································· 10
3. 5  键盘服务程序设计·········································································10
3. 6  显示子程序服务程序设计······························································· 10
 系统调试与测试结果分析·············································· 13
　　　4. 1  使用的仪器仪表··········································································· 13
　　　4.2  系统调试····················································································· 13
　　　4.3  测试结果····················································································· 13
　　　4.4  测试结果分析·············································································· 13
 结束语································································· 14
附录··········································································· 15
参考文献······································································· 40