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基于28379和LAN9252做ethercat通信

没焊9252之前最小系统可以正常运行程序(点灯),在焊好9252之后程序一直停在 InitSysCtrl();中的while中过不去,请问可能是什么原因?9252换了一个芯片,不会是芯片的原因,可以肯定和LAN9252部分有关,只是想不通