基于TCP/IP协议的串口网关实时性的建模与分析  

Real-time performance analysis of serial port network gateway based on TCP/IP protocol

作　　者：佘小莉[1] 唐祯敏[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《计算机工程与设计》2007年第21期5115-5118,共4页Computer Engineering and Design

摘　　要：在传统串口设备通过标准TCP/IP协议接入Internet的过程中,需要设计一种基于工业以太网的串口数据通讯和控制系统,其数据通讯的实时性是衡量控制系统的一个重要指标。因此,为了分析串行数据通信系统的实时性能,建立了串口数据包传送时间延迟的数学模型,并以ARM9系列的AT91ARM9200微处理器和LXT971ALE网络接口芯片等为基础构建嵌入式系统,移植Linux,并在RH Linux9.0为ARM处理器提供的交叉开发工具的平台下,以实测数据试验误差验证了该模型的准确性和普遍性,从而为开发人员对各种串口设备的参数设置提供理论指导。An ethernet-based serial port inter-communication and control system is developed. However, the real-time performance of serial interface＇ data transmission is an important index for the evaluation of the overall control system. Hence, in order to analyze the real-time performance, a math model is established on the basis of two groups of real data testing on the platform of embedded system based on ARM9 MCU AT91ARM9200 and network interface chip LXT971ALE, which Linux operation system is ported. Serial port/ Ethernet data transfer device through TCP/IP protocol is developed under RH Linux 9.0 and Linux cross development tools for ARM. The relative error data between the practical data and theoretical data convince the validity and universality of this model.

关 键 词：以太网 多串口 实时性最小二乘拟合 嵌入式 网关 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]