RFSoC 4x2 QSFP -> SFP RJ45 1 GbE

Hi,

I wanted to know if anyone has tried and had success using the QSFP28 interface with a qsfp28 to sfp adapter and then a 1 GB RJ45 SFP? I am trying to send out basic UDP 1 GBE Ethernet traffic, but due to the pinout on the four TX and RX channels being flipped 3->0 and 0->3, I can’t use the AMD IP to create a 1-channel GBE link. The adapter only uses channel 0, but the IP expects that when you pick a transceiver laneX0Y4, etc, the RX and TX are on the same pin pair, but on this board it is flipped. I have tried “tricking” the code in order to transmit on one lane and receive on another, but to no luck. I was trying to avoid having to go through the ARM in order to transmit Gbe, but I may have to just go ahead and do that.

Thank you,