基于FPGA的出租车计费系统设计

The Design of Taximeter Based on FPGA

出租车计费系统大多利用单片机进行控制,较易被改装,且故障率较高。针对这一问题,设计了一种基于FPGA的出租车计费系统,可模拟汽车行驶、暂停等待,停止等过程,并可同时显示金额、乘车总路程。设计采用层次化设计方法,用VHDL语言进行编程,开发软件为MAX+p lusⅡ。经测试,波形与仿真结果都满足设计要求。

The taxi pricing system is mostly controlled by SCM.It is easy to refit privately,and the malfunction rate is higher.For this problem,the paper introduces a kind of new taximeter based on FPGA,which can simulate the running,pausing and stopping of car and so on.Also it can display the amount of money and riding distance simultaneously.It Uses the hierarchical design method,this design is programmed by VHDL and the simulation platform is MAX＋PLUSⅡ.The test results indicate that both sin-waveform and simulation are consistent with the design demand.