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DM8148 引导 auto negotiation failed



专家您好:

         我现在正在使用DM8148开发板,正在做内核引导功能,使用的uboot,我的目的是:通过TFTP远程下载,将内核映像从主机下载到目标板的DDR上,但出现这个错误-Auto negotiation failed,另外,我还将尝试另外两个命令,分别是DHCP和TFTP,但也都出现一样的问题!

         请专家指点迷津!谢谢!