基于单片机的多功能出租车价器设计.doc

数理与信息工程学院 毕业设 计 题 目： 多功能出租车计价器 专 业： 计算机科学与技术（专升本） 班 级： 姓 名： 学号： 指导老师： 成 绩： ( 2006.6 ) 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··············································