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am3359的ICE板子，在Uboot模式下，网络不能用

xue su
Prodigy 100 points
Other Parts Discussed in Thread: AM3359, TLK110

我使用的是am3359的ICE开发板，进入uboot模式下，然后tftp，出现下面现象：

U-Boot# tftp
Auto Negotitation failed for port 0
Auto Negotitation failed for port 1

我的引脚配置如下：

{rgmii1_pin_mux, PROFILE_ALL, DEV_ON_BASEBOARD},
{rgmii2_pin_mux, PROFILE_ALL, DEV_ON_BASEBOARD},

请问是哪里出错了？