I'm using LPC1758 to connect a four port switch (using RMII, mac to phy). I already configured EMAC module and can see frames are sent out from switch ports. It seems Tx in LPC1758 EMAC is working. But Rx is not working. I print the two Rx registers: RxProduceIndex and RxConsumeIndex. Both of them are always zero. Is that any special config will cause Tx works but Rx not work.