基于ARM和FPGA架构的地铁车辆MVB总线分析仪设计

Design of MVB Analyzer Based on ARMand FPGA Architecture of Metro Vehicle

车辆通信多功能总线(MVB)已成为城市轨道交通车辆通信的主流。将FPGA(现场可编程门阵列)的高速信号采集的优势与ARM(嵌入式微处理器)可嵌入实时操作系统的特点相结合,研制了基于嵌入式系统的便携式总线分析仪。搭建了测试系统,在MVB设备EDCU(车门电子控制单元)中进行试验验证。验证结果表明,该总线分析仪可实现与MVB设备的主帧发送和从帧回复的精确采集和解码,可用于地铁车载MVB设备的故障检测和维修等。

Multifunction vehicle bus （MVB） has become a mainstream train communication in urban rail transit system. In this paper, a system structure, which combines the advantages of FPGA （field programmable gate array） in high speed signal acquisition, and the characters of ARM （advanced RISC machines） capable of embeding in realtime operation system is used to develop a portable MVB analyzer based on embedded system. In the paper, a test system is verified in MVB device （EDCU）, aiming to prove that functions of MVB analyzer could fulfill all require- ments,including the accurate acquisition, decoding of mas- ter frames sending and slave frames answering. This analyzer can be used to detect errors in MVB devices and also be used in equipment maintenance.