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so yeah, I checked with modelsim and it works fine, we will review our code again and see maybe the physical layer is doing some troubles.
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Set your transmitter pattern to something slow enough that you can see it with a scope, and probe the RX pins.
Check you're not missing something obvious, eg., the correct pin assignments, or a missing termination, or power supply voltage.
Also check to see whether you need to AC couple the links. If you're testing FPGA-to-FPGA, it should be ok, but if you're interfacing to something else, then check the common-mode voltage is compatible.
Cheers,
Dave
Honored Contributor
