08-17-2008 11:52 PM
I am in the process of integrating an Aurora core to a PCIe interface using ML555 board. I have implemented the Virtex 5 Aurora core and when I test in the hardware using chipscope I can see that the RX_SOF_N signal is constantly held low hence the interface receive side not working. Has anyone see this behaviour before?
Thanks and regards,
08-26-2008 02:55 PM
Have you verified that Channel_up has gone high and that the link partner is actually sending SOF characters? A lot of the time it's a simple matter of putting the MGTs into loopback for testing to make sure that everything comes up correctly and is being sent/recieved correctly then moving on to board-to-board verification. ChipScope is actually very nice for this since you can quickly add the Channel_up, lane_up and all of the local link interface signals for both ends of the link.
09-03-2008 01:58 PM
09-03-2008 03:44 PM
I eventually found what I was doing in my case... I was not driving all the input signals into the aurora core properly... in fact I was not driving
-- UFC Interface
-- Native Flow Control Interface
input signals properly... and once I had these signals driving properly... I had the aurora link working correctly.
Thanks a lot for you help.