熊启龙

(水利部淮河水利委员会水文局(信息中心)，安徽 蚌埠 233001)

　　摘 要：针对当前遥测终端机有线网络通信能力不足，为使遥测终端机具备有线嵌入式以太网网络通信功能，在分析目前常用的几种代表性的网络接口芯片应用特点的基础上，以集成全硬件 TCP/IP 协议栈的嵌入式以太网控制器W5500芯片为例，介绍在遥测终端机中集成W5500芯片的应用设计与技术思路，分析其结构特点、接入方式、软件驱动库和使用方法，阐述遥测终端机的几种常用网络通信业务应用方式。通过在遥测终端机内嵌W5500以太网控制芯片，移植驱动库，利用其提供的符合BSD Socket(伯克利套接字)的应用编程接口，开发人员不需要了解TCP/IP协议的细节，就可以与远端建立Socket连接进行通信，使得终端机可以接入以太网中，作为其中的一个节点，建立起丰富的网络应用。

　　关键词：遥测终端机;有线嵌入式以太网;网络结构;TCP/IP;W5500芯片;驱动库

　　Application research of wired embedded Ethernet in telemetry terminal

　　XIONG Qilong

　　(Hydrological Bureau of the Huaihe River Commission, Bengbu 233001,China)

　　Abstract: In view of the insufficient wired network communication capability of the current telemetry terminal, in order to possess the telemetry terminal with the function of wired embedded Ethernet network communication, taking the embedded Ethernet controller W5500 chip, integrated with the full hardware TCP / IP protocol stack, as an example, this paper introduces the application design and technical idea of intgrating W5500 chip in telemetry terminal, analyzes its structural characteristics, access mode, software driver library and application method, and expounds several common network communication service application modes of telemetry terminal, based on the analysis of the application characteristics of several representative network interface chips commonly used at present. By embedding W5500 Ethernet control chip in the telemetry terminal, transplanting the driver library, using provided BSD-socket-compliant application programming interface, developers can establish socket connection and communicate with the remote without knowing the details of TCP/IP protocol, so that the terminal can be connected with Ethernet, and as one of the nodes, to establish rich network applications.

　　Key words：Telemetry terminal; wired embedded Ethernet; network structure; TCP/IP;W5500 chip;drive library