Design Of Fpga-based Taxi Meter

In nowadays, the capability and complexity of electronic manufacture have been greatly improved, but the price is reduced, and the updating speed of electronic manufacture is quite fast. The main reason for this is the development of integrate circuit, at the same time, the tools for design,simulator,integrate circuit making are developed with high speed. For example, the invention of EDA technology and large-scale programmable logic device FPGA leads to a big change to electronic system design technology. By using EDA technology to develop CPLD and FPGA, it will help deviser to reduce cost, shorten cycle, and advance reliability, and also by using it, it's possible to amend the logical function in system at any moment.This essay introduces a design of taxi fare register by using FPGA chip, describes the significance and importance to research this, explain makeup elements of FPGA which is made by Altera Company, introduce the main function and design of super velocity integrated circuit hardware description language, discuss upon system elements and functions of taxi fare register. And the main point is that how to use burgeoning EDA parts to replace traditional electronic design, and by usage of sententious and changeful design plans of FPGA, how to shorten the research cycle and make taxi fare register smaller and more functional.Along with development of taxi vocation, the fare register is more and more requested to be with high standard. The users request fare register to performance stable, cost accurately, and guard against cheats. The design mentioned in this essay not only has these basic functions, but also adds some new thinking in the design according to the particularity of taxi vocation. The charge ways are different in different nationalities and locations. There will be some extra charge for night and suburb in some areas. And even in the same area, the charge way is different for different taxi models. As per the special requests for fare register in different areas, the design of taxi fare register should be more agile. And the lack of energy sources, wave of oil price, the cost of air condition in summer, and toll charge all request functional agility of fare register. At the same time, to make trading volume statistic much easier and to avoid cheating of taxi driver, this kind of fare register has some new functions, such as statistic function, password setting up function, toll charge and cost of air condition counting function. By using traditional LED display usage, this design will be more attractive in market because of the lower price. This essay mainly describes the FPGA chip made by Altera Company, and it is designed with VHDL Language. This makes the products much easier to update. By using MAX+PLUSâ…¡10.2 to emulate taxi fare register VHDL code, the FPGA digital experiment system can be controlled.