Data Link layer of OpenWire (ECSS-E-ST-50-12C Rev.1 clause 5.5): transmit and receive FIFOs (DL-1, DL-2), link state
machine (DL-3), flow control manager (DL-4), transmit scheduler (DL-5), receive handler (DL-6) and link error recovery
(DL-7).
Testbench: link state machine, flow control, priority, broadcast codes and recovery against the far-end model; traffic, restart and EDAC between two ports