SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
Message Type | Value (hex) |
---|---|
Sync | 0 |
Delay_Req | 1 |
Pdelay_Req | 2 |
Pdelay_Resp | 3 |
Reserved | 4:7 |
Follow_Up | 8 |
Delay_Resp | 9 |
Pdelay_Resp_Follow_Up | A |
Announce | B |
Signaling | C |
Management | D |
Reserved | E:F |
Once a transmitted or received packet is determined to be a valid time sync packet, the Ethernet Transmit Event or Ethernet Receive Event is loaded onto the Event FIFO.
The CPSW_CPTS_EVENT_1_REG register contains the Message Type and Sequence ID values from the original time sync packet. The CPSW_CPTS_EVENT_0_REG (and CPSW_CPTS_EVENT_3_REG) register contains the time stamp value when the packet arrived at the corresponding port.