问题1:
采用DP83848ivv与STM32F427中间通过RMII进行通讯,PHY与RJ45之间串有隔离变压器,打EFT 等级4 以太网与外部屏通讯以太网掉线,可自动恢复连接,偶尔通讯偶尔掉线,外部干扰去掉后,通讯正常。
问题2 :
采用示波器测量PHY与ARM间的RXD0数据后,网线插在电脑上电脑及PHY外挂的RJ45指示灯均不亮,但是PHY的RJ45通过网线与显示屏连接时,PHY的RJ45指示灯亮及闪烁,且能与显示屏通讯,这个是什么问题?
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