- Using the BUFIO makes another clock domain....FPGAs apparently hate clock domain crossings, avoid them at all cost.
- Now moving back to having on high speed clock domain for logic and DDR blocks, take care of IO alignment in software for TX and RX
- Also, fixed the io_wait path with logic...not sure what I was thinking there. Logic was trivial. The way it was,the io path was going straight into the FIFO as a wait.
- Using new packet interface
- Adding active signal, indicating that link is ready. This way you don't need to guess when the link is ready (no magic constants)
- Removed register on por reset input to get rid of x on startup.
- holding rx in reset state until tx is done
- removing reset from all pipeline registers
- removing reset from oddr/iddr
- the idea is to keep things quiet not to block in lots of places. The only real block needed is in the FIFO to keep "noise" from propagating past the link. The link should be kept in a safe reset state until the rx fram is stable and the clock is running so that the pipe can be cleaned out.
