Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorTriple speed ethernet IP core don't receive the RGMII data?
I use the triple speed ethernet IP core with an external PHY Device, the first picture is shown as my test block diagram . Transmiting part works normally, however, There is no data on the avalon-ST ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Recently, a similar module had been implemented successfully on the same board. Is there other reasons for the above phenomenon except for some hardware problem ? --- Quote End --- A hardware problem or error on your part connecting the pins is by far the easiest problem. A quick sanity check on that would be to simply assign the 2nd PHY to the 1st MAC and vice versa (i.e. does the problem follow the PHY). If the 2nd PHY starts working and the 1st PHY stops working, you know that you have incorrectly configured/connected the 2nd MAC somehow. Beyond hardware / pin connection problems, you should review your MAC signal connections, specifically the clocks/resets/streaming interface. It may be worthwhile to skim the Quartus output and look for warnings that are present for one MAC but not the other. But in your shoes, I would revisit the known-working system and review differences between it and my broken system. Good luck.
