基于ENC28J60的嵌入式异构网关与Web应用

Embedded Gateway and Web Server Based on ENC28J60

摘要:

面向单片机应用系统中的网络功能扩展,基于ENC28J60的接口性能和网络驱动操作,分析了以太网转换、异构网关、Web服务器在串口连接构成的测控网络中的任务和模块构成,并参照Microchip TCP/IP(传输控制协议/网际协议)协议栈,给出了RS485Ethernet网关的设计举例,提出了基于相对新鲜度概念的ARP(地址解析协议)映射维护机制.分析表明:基于ENC28J60和MCU开发嵌入式网关,接口简单,开发方便;具有多网段通讯管理功能的RS485-以太网网关,特别适用于多表、多户的集中抄表应用.

Abstract:

This paper aims at the network performance of MCU-system. According to the interface and net-driver of ENC28J60, the tasks and moudles are analyzed about the UART-Enternet Bridge, the UART--IP Gateway and the embedded Web Server in control net. A RS485-Entemet Gateway exam- ple is provided based on Microchip TCP/IP stack; and a conception of fresh-value is proposed to uphold arp-cache, The embedded gateway with ENC28J60 and MCU is of simple-inteface and easy to develop,which is suitable for the concentration of meter reading.