基于STM32的快速嵌入式以太网接口

摘要

为了推进嵌入式设备网络化发展,设计了一种基于STM32F103ZET6处理器和DM9000A以太网控制芯片为核心的嵌入式以太网接口.单片机对网卡芯片进行初始化、数据的封包和解析,并通过FSMC对以太网芯片并行读/写,DM9000A负责网络数据的发送和接收.给出了接口系统设计框架和硬件电路,详细介绍了网卡初始化步骤和数据包收发的软件设计流程.TCP通信实验表明:该接口结构简单、传输速度快、丢包率低,能够实现可靠的嵌入式设备网络通信.%An embedded Ethernet interface based on STM32F103ZET6 and DM9000A was designed to promote the network communication of embedded devices.MCU is responsible for the initialization of network chip, packets and analysis, and read or write DM9000A with FSMC.DM9000A is major in sending and receiving data.The framework and hardware circuit were given.Ini-tialization procedure of the network card and the process of data packet sent and received were introduced.TCP experiment shows this system has advantages of simple structure, fast speed, low packet loss rate, and can achieve reliable network communication.