基于FPGA的出租车计价器的设计毕业论文.doc

PAGE \* MERGEFORMAT2 基于FPGA的出租车计价器的设计 摘 要 出租车计价器是乘客与司机双方的交易准则。具有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。现在各大中城市出租车行业都已普及自动计价器，而部分小城市尚未普及，但随着城市建设日益加快，象征着城市面貌的出租车行业也将加速发展，所以计价器的普及也是毫无疑问的。 本论文阐述了EDA的发展及其优势、FPGA的发展趋势及结构特点和VHDL语言的优点及语法结构，并分析了出租车计价器各模块的功能要求、基本原理以及实现方法。本论文的设计采用VHDL硬件描述语言进行编程，基于Quartus II软件平台进行编译和仿真。论文介绍了采用FPGA芯片设计出租车计价器的方法，阐述了该计价器的主要组成单元：车轮大小选择模块、计程模块、计时模块及计费模块、数据分配模块、分频模块、译码模块的设计方法，同时给出了详细的仿真波形，实现了出租车基本计费功能，还能模拟汽车启动，停止，暂停等状态，同时提高了计费系统的可靠性、通用性。本设计在FPGA试验箱上运行良好，实现了计费器的各项功能。 关键字 FPGA，VHDL，Quartus II，出租车计价器 PAGE \* MERGEFORMAT2 Subject: The design of the taxi meter based on FPGA Specialty: Microeletronics Science and Engineering Name:Dan Shen (Signature) ___________ Instructor: Gaili Yue (Signature) ___________ ABSTRACT Taxi meter is the rule of passenger and driver. Have a good performance of the meter for our taxi driver or passenger is very necessary. Now the automatic taxi meter has popularized, and some small city has not been popular, but with the quickening of city construction, the symbol of the city will accelerate development of the taxi industry. This article elaborates the concept and development of EDA , the development trend and structure ofthe FPGA, andexplains the advantages and grammar structure of VHDL ,meanwhile, analysed the function request, the basic principle as well as the method ofaccomplishment of each parts. This systems design programmes in the VHDL, compiled and emulated basing on Quartus II platform of Altera consists of four modules, that is speed, mileage, timing and billing module. This paper introduce one method that can use a chip of FPGA to design taxi meter, which consists of four modules, that is speed, mileage, timing and billing module, and then, describe the design of each module and give out the simulation. This taxi meter can be self-charging according to mileage, which also can simulate the state of speed,such as start, stop, and pause, at the same time, its reliability an