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C6678 GE以太网问题

工程师们你们好,我在调试以太网时先用的NDK,已经调试完成,但速度方面有点低,因此想用官方的GE例程进行开发,但在开发时测试DSP与PC通信时,照下面正常设置后,调试一直有问题,一直显示wait for port 0 PHY link。

硬件板上两个网口都接了88E1111,RJ45接口。

GE_Test_Data_Path test_data_path= GE_TEST_DSP0_TO_DSP1;

Ethernet_Mode ethernet_mode = ETHERNET_AUTO_NEGOTIAT_SLAVE;
GE_Port_Connection port_connect[2]=
{
   GE_PORT_CABLE_CONNECT, //SGMII port 0
   GE_PORT_CABLE_CONNECT  //SGMII port 1
};

请问这是什么问题呢? 还需要哪儿进行设置吗?