安全单向的嵌入式USB通信设备分析与设计  

Analysis and design of safe and one-way embedded USB communication equipment

作　　者：牟鹏至[1] 李飞[2] 赵伯听[1] 

机构地区：[1]成都信息工程学院计算机系,四川成都610225 [2]成都信息工程学院网络工程系,四川成都610225

出　　处：《计算机工程与设计》2009年第9期2111-2113,共3页Computer Engineering and Design

基　　金：四川省科技支撑计划基金项目(2008GG0007)

摘　　要：为了防止USB设备向目标主机进行文件传输时,窃取目标主机中的信息,研究了一种基于ARM940T为内核的CPU、uClinux为实时操作系统的嵌入式USB通信设备平台,阐述了以CH375为USB接口控制芯片、多模光纤为传输媒介的总体设计方案,分析了嵌入式USB主机模块和UDP协议设计模块。针对该设备与PC机安全单向通信的特殊性,提出了模块设计中的关键问题,给出了详细的解决方案和实现方法。结果表明:U盘和PC机间通过嵌入式USB通信设备不仅能够进行单向通信,而且其通信速率可高达2Mb/s。To prevent USB devices transfer files to the host of targets,which steal the information from the host of targets.An embedded USB communication equipment platform is studied based on ARM940T core CPU and uClinux.The design scheme for the USB interface with CH375 and transmission medium with optical fiber is expatiated.The embedded USB host module and UDP protocol design module are analyzed.According to the particularity of safe and one-way communication between the equipment and PC,key issues of modular designs are put forward,and detail solutions and methods are given.The result shows that U disk and PC through the embedded USB communication equipment can not only carry out one-way communication,but also its speed is up to 2 Mb/s.

关 键 词：嵌入式USB通信 安全单向 CH375芯片 多模光纤 UDP协议设计 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]