基于RTL8019AS的嵌入式水情测控终端的研究

Study of Embedded Irrigation Information Measurement and Controlling Terminal Based on RTL8019AS

本文首先介绍了RTL8019AS以太网控制器的工作原理、驱动方式及其与主处理器和以太网的接口。在此基础上通过合理选择TCP/IP协议子集,将协议栈嵌入到高速AVR单片机ATMEGA128中,借助网卡芯片RTL8019AS设计了将设备接入以太网的嵌入式系统并将其应用在水情信息测控领域。该装置能够使测控设备通过互联网进行数据传输,功耗低,效率高,对目前主要以PSTN与MODEM进行通信的水情测控技术是一个很大的改进。

This paper presents the operating principle anddriving method of Ethernet controller RTL8019AS, and its interface to main processor and Ethernet. Based on RTL8019AS, we can design an embedded system after rightly choosing TCP/IP protocol and embedding it into the high speed AVR singlechip, and apply the system in the irrigation information field. With the system, measurement and controlling equipment are capable of data transmitting through Internet with low power loss and high efficiency. It makes a great improvement on original irrigation information measurement method whichtransfers data using PSTN and MODEM.