Clears the Message Counter of the PTP port. The 32-bit value is defined as below: + | 32 11 | 10 1 | + | reserved | message type and direction | + Bit 1 to bit 10 for type and direction of the message counter to be cleared. Set one or more bits to 1 to clear specified message counters. bit 1 - AnnounceTx bit 2 - AnnounceRx bit 3 - SyncTx bit 4 - SyncRx bit 5 - DelayReqTx bit 6 - DelayReqRx bit 7 - DelayRespTx bit 8 - DelayRespRx bit 9 - FollowUpTx bit 10 - FollowUpRx Other bits (bit 11 to bit 32) are reserved for future, and suggest to be 0.