EtherCAT协议芯片与单片机通信系统的研究

摘要

EtherCAT是基于标准的以太网技术,具有灵活的网络拓扑结构,系统配置简单,具有高速、高有效数据率等特点,其有效数据率可达90%以上.PIC系列单片机和EtherCAT协议芯片通过SPI串行通信方式进行连接,实现基于EtherCAT协议通信系统的基本通信功能,解决了传统以太网的介质访问控制方式不能满足工业现场实时性要求的问题.系统测试实验表明,系统通信准确,运行稳定,而且通过分析系统通信过程中的报文可知,系统的通信完全符合EthercAT 协议的要求.%EtherCAT based measured Ethernet technology has flexible framework of topology of network, simple of configure of system, and it has character of high speed and percentage of available date, which can reach ninety percent. It has solved problem of real time of Ethernet. The PIC series MCU was selected to communicated with EtherCAT by SPI connection. The result of experiment show that exact communication and stably system.