Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 11/11/2022
Public

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17.6.5.5. Receive Path Functions

The MAC processes the received frames to identify valid PTP frames. You can control the snapshot of the time to be sent to the application, by using the following options:

  • Enable timestamp for all frames.
  • Enable timestamp for IEEE 1588 version 2 or version 1 timestamp.
  • Enable timestamp for PTP frames transmitted directly over Ethernet or UDP/IP Ethernet.
  • Enable timestamp snapshot for the received frame for IPv4 or IPv6.
  • Enable timestamp snapshot for EVENT messages (SYNC, DELAY_REQ, PDELAY_REQ, or PDELAY_RESP) only.
  • Enable the node to be a master or slave and select the timestamp type to control the type of messages for which timestamps are taken.

The DMA returns the timestamp to the software inside the corresponding transmit or receive descriptor.