/**********************************************************************
* EtherCAT主站对PHY有要求?
* 说明:
* 之前常听说EtherCAT主站对PHY有特殊的要求,于是找点资料确认一下,结论
* 是没有什么特殊的要求,另外就是EtherCAT和CANOpen类似通过配置文件进行
* 功能配置。
*
* 2018-11-30 深圳 宝安西乡 曾剑锋
*********************************************************************/ 一、参考文档:
. EtherCAT
https://en.wikipedia.org/wiki/EtherCAT
. EtherCAT主站开发经验——基于X86或ARM
https://jingyan.baidu.com/article/6181c3e0844e7d152ef15332.html 二、Ethernet和EtherCAT在7层网络(ISO/OSI Reference Model)架构上的区别:
. The TCP/IP Stack shown is not needed for typical fieldbus devices.
. EtherCAT master can access all data including name and data types of an EtherCAT slave without complex tools.
. EtherCAT uses Standard Ethernet (IEEE 802.3 - Ethernet MAC and PHY) without modifications. 三、 Device Profiles:
The device profiles describe the application parameters and functional behavior of the devices, including device-specific state machines. The following software interfaces are provided for existing device profiles. Thus, the migration to EtherCAT by adjusting the firmware and the hardware is simplified significantly.