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AM335x ICE ethercat 连接



我在TI AM335x ICE V2.1 的板子下载了ethercat_slave_full_AM335x_arm,程序也正常启动,串口的输出:

Version - EtherCAT Slave 01.00.07.02

Board name : A335_ICE
Board Revision : 2.1A
EtherCAT Device
SYS/BIOS EtherCAT Internal application 3.3.0Rotary switch state : 9

Revision/Type : x0190 Build : x04ee
Firmware Version : 1.4.238

我电脑网口和板子的网口直连,没有被识别,Jumpers J18 and J19 是  Pin1 and Pin2.相连的,请问还有什么的硬件配置相关?