目 录

第1节     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

第2节     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

第3节     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

第4节     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

第5节     结束语································································· 14