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Check the full VFAT3 RX stream

Laurent Petre requested to merge feature/full-vfat3-stream-checks into devel

This is another attempt to better grasp the spurious events and CRC errors seen on VFAT connected to the GE2/1 GBT1 link. From the commit message:

This commit ensures that all bits sent by a VFAT3 are checked for consistency at the receiver. The words must be either part of a DAQ data packet or a valid VFAT3 DataOut code:

  • Idle patterns
  • Slow-control codes
  • Sync ack or sync verify ack

This is particularly meaningful in the case of the unprotected GE2/1 GBT1, which cannot see its content checked by any other mean.

Tested on the production system at P5 during the GE2/1 trolley test and initial commissioning.

Edited by Laurent Petre

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