External trigger LVDS signals through TP pins

Hi Frans,

please take a look at this merge request, which is related to FLX-1744. The major changes is https://gitlab.cern.ch/atlas-tdaq-felix/firmware/-/blob/phase2/master_FLX-1744_testbeam/sources/ttc/ttc_decoder/ttc_fmc_wrapper_xilinx.vhd#L938 . The other changes are mostly for debugging. Please notice that the time-stamping logic was not tested when the beam was running.

This merge request is not urgent

Thanks Best, Marco

P.S: I would like to keep the branch open