When a match is recognized, the PHYresponds to that particular frame. 当一个匹配被检查到,PHY响应一个特殊的帧。
The PHY address is also used to seed the scrambler.PHY.地址也用于种子的扰码
In a multi-PHYapplication, this ensures that the scramblers are out of synchronization and dispersesthe electromagneticradiation across the frequency spectrum.
根据上面的说法我们这里LAN7820的地址应该是0,所以找到LAN8742A_PHY_ADDRESS这个定义改为0即可。
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