基于单片机的出租车计价器及其界面设计1.doc

目录 摘要 1 关键词 1 Abstract 1 Key words 1 引言 1 1 材料与方法 3 1．1 实验设备 3 1．2 研究方法 4 1．2．1 采用单片机控制 4 1．2．2 数据采集 4 1．2．3 数据处理 5 1．2．4 12864液晶显示 5 1．2．5 掉电存储保护 5 2 结果与分析 5 2．1 硬件设计 5 2．1．1 AT89S52单片机最小系统模块 5 2．1．2 磁性开关霍尔转速计数检测传感器模块 6 2．1．3 12864液晶显示模块 7 2．1．4 掉电储存模块 8 2．2 软件设计 9 2．2．1 主程序模块 9 2．2．2 定时中断服务程序 10 2．2．3 霍尔测速程序 11 2．2．4 里程计数中断服务程序 12 2．3 测试结果 12 2．3．1 界面启动测试 12 2．3．2 里程计价测试 15 2．3．3 掉电储存测试 16 3 结论 16 致谢 17 参考文献： 17 附录 18 不仅要求性能稳定、计价准确而且对它的要求也越来越高良好性能的计价器无论是对广大出租车司机朋友还是乘客来说都是很必要的89S52 单片机为核心控制元件，利用灵敏的霍尔传感器测距，采用AT24C02 实现在系统掉电的时候保存单价和系统时间等信息，输出采用25-字库12864液晶屏显示，通过开关控制单价、路程、总金额以及时间的显示。本电路设计的计价器主要功能有：数据的复位、白天/晚上转换、数据输出、计时计价、单价输出及调整、路程输出、实现在系统掉电的时候保存单价和系统时间等信息等功能。虽然设计存在一些不足之处，但是基本功能已经实现，运行效果令人满意，也证实本次设计的可行性。 关键词: 单片机，霍尔传感器，分屏显示，AT89S52单片机 Review of taximeter based on SCM system Student majoring in Electronics information science and technology Da Wenting Tutor Abstract：With the development of taxi industry development, Taximeter requires not only accurate and stable performance, valuation of its appearance and function expansion and other requirements are also getting higher and higher. Good performance valuation implement either the majority of taxi drivers friends or passengers are very necessary. This valuation implement design hardware with AT89S52single chip as the core control components, sensitive Hall sensor, using AT24C02 realize in system power down when preservation of monovalent and system time information, output uses 25- font12864 LCD screen display, through the switch control unit price, total amount, distance and time display. The circuit design of the meter main functions: data reduction, day / night conversion, data output, timing, price adjustment, and valuation of output. Output, implemented in the system power off when preservation of monovalent and system time information and other functions. Although the design has some deficiencies, but the basic function has been achieved, running effect is satisfactory, also confirmed the