基于fpga出租车计费器设计毕业论文.docVIP

大连海事大学 ┊┊┊┊┊┊装┊┊┊┊┊┊┊ ┊┊┊┊┊┊装┊┊┊┊┊┊┊订┊┊┊┊┊┊┊线┊┊┊┊┊┊┊ 二〇一四年六月 基于FPGA的出租车计费器的设计 专业班级: 电子信息工程3班 姓 名: 李 宁 指导老师: 严 飞 信息科学技术学院 摘 要 随着EDA技术的日益成熟的发展趋势， 与电子设计相关的设计技术与开发平台等也都有了迅猛的发展。可编程逻辑器件CPLD/FPGA的快速发展与深入应用也为设计人员提供了很大的便利。本文主要介绍一种基于FPGA芯片的出租车计费器的设计方法，对该设计方法的研究意义和应用价值进行了阐述，描述了FPGA芯片的发展历史和主要应用，介绍了VHDL（硬件描述语言）的主要功能和算法设计思想及设计流程。 本次设计高效利用FPGA设计方法的多变性和可编程性等优势，有效的缩短研发周期，设计出体积小、功能强的出租车计费系统。能够根据需求简便、快捷地调整出租车计费价格，并且防止作弊现象等问题的产生。 该出租车计费器主要包含五大模块：分频模块向各模块提供驱动信号；计量模块完成等待时间和所行驶路程数据的统计；计费方式选择模块是对汽车行驶过程不同计价状态进行判断输出；计费模块完成总费用统计计算；动态扫描模块最后将累计等待计费时间、行驶路程以及计费总数等实时显示出来。 本次设计采用VHDL硬件描述语言编写计费器的系统程序，QuartersⅡ软件作为开发平台，对程序进行了仿真，最后将生成的目标文件下载到教学实验仪器ZY11EDA13B的FPGA芯片中，完成了相应的硬件测试和验证，证明了出租车计费系统的可行性。 关键词：EDA；FPGA;出租车计费器；VHDL;QuartersⅡ ABSTRACT With the growing maturity of the development trend of EDA technology, and the technologies and the design of the platform which related to the electronic design , also have a very rapid development.The fast development of Programmable logic device and in deepth application also offers a great convenience to designers. This Paper introduces a method for FPGA chip to design a taxi billing system and describes the significance and value of the design methods , describes the history and development of FPGA chip main application , introduces VHDL ( hardware description language ) main function and algorithm design and design processes. Efficient use of FPGA design method variability and programmability advantages could effectively shorten the development cycle, and design a small but powerful taxi billing system. According to effectively address the needs of simple , it can quick adjust taxi meter rates to prevent cheating and other issues. The taxi meter mainly includes five modules: the divide module module provides drive signal to other module; the metering module works to statistical date about the wait1ing time and the distance traveled; the control module is used to judge output of the cars with different pr