02-03-2021 12:10 AM
Currently, I am researching the SFP module on ARTIX 7 board but the problem is as follows: I used the GIG_Ethernet PCS / PMA core in the IP Catalog to SGMII mode to loopback 1 SFP module but be not successful. I configured MDC-MDIO for PCS/PMA core and sent some frames but gmii_rxd_test wasn't had the digital signal. Can you help me?
I attachment PCS/PMA core and Debug image for reference.
Hope you support!
02-08-2021 05:59 AM
Hi @Dat ,
How did you setup the loopback? Have you tried near-end PCS loopback and see if that works first? How about TX direction? Do you see any txd data?
02-08-2021 05:51 PM
Thank you for responding to my problem. I used TX-RX in an SFP module, configure register 1 such as for example design core to set up the loopback. Also, I used Debug core to monitor. Above is my debug core picture. You can see, I sent continuously packets but not receive anything. Can you help me?
02-08-2021 07:54 PM
02-09-2021 01:53 AM
Hi @Dat ,
Please try to put the core in internal loopback and see if this works first. You can refer to PG047 for details on how to do it.
02-16-2021 07:27 PM
Thank you for responding to my problem. I have put the core in an internal loopback and always refer to PG047 when I used to core. No problem when I simulate but not having the RXD signal when I wrote the FPGA board. Can you help me?
02-17-2021 06:55 AM
Hi @Dat ,
Are you saying the external SFP loopback does not work on HW? Have you used this SFP module in loopback mode successfully in the past? How about connecting to a link partner, such as a PC etc? Does this work?
02-23-2021 07:55 PM
Thank you for responding to my problem. About the external SFP loopback, I have simulated successfully but not having the RXD signal when I wrote the FPGA board. Besides, I have done successfully on the KCU040 board with loopback one SFP module and transceiver data on PC with two SFP modules. Can you help me?