- ptp_clock.c replaces the 3.1 logger: UDP/IPv4 multicast, E2E.
Announce: IEEE 1588 dataset comparison picks the best GM, dropped after
announceReceiptTimeout x its announce interval. Sync/Follow_Up (two-step
and one-step) with HW t2 and correctionField. Delay_Req sent as a raw
frame (DSCP ptp.dscp, TTL 1, clockIdentity = EUI-64 from MAC) with HW
TX timestamp t3, randomised at the GM's Delay_Resp interval; Delay_Resp
matched on requestingPortIdentity + seq.
- Path delay corrected for offset drift between t2 and t3 (rate from
consecutive Syncs) so it is right before the clock is syntonised.
- ptp_hw: ptp_hw_send_event() builds Eth/IPv4/UDP 319 and returns the HW
TX timestamp.
- Verified vs ptp4l (i210 GM, HP 2530 non-PTP switch, PC 1G / board 100M):
GM selected, path delay settles at ~10.3 us and stays flat, rate
-39.8 +-0.4 ppm, offset drifts at -40 us/s (no servo yet).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- aes67_ptp/ptp_hw.c: start the EMAC IEEE 1588 clock (IDF
ETH_MAC_ESP_CMD_PTP_ENABLE) and additionally enable snapshots for
PTP over UDP/IPv4 (IDF only enables PTP over Ethernet/L2). An RX hook
on the driver's info input path records {type, seq, sourcePortId, HW
timestamp} of port-319 PTPv2 event messages, then hands every frame to
lwIP unchanged.
- aes67_ptp.c: temporary 3.1 logger joins 224.0.1.129:319/320 and pairs
Sync HW RX timestamps with Follow_Up origin timestamps.
- Checked against linuxptp ptp4l (-4 -E -H, Intel igb) as GM: every Sync
has a HW timestamp; HW Sync intervals track the GM intervals with a
constant -39.8 us/s (+-0.3 us), i.e. local clock -39.8 ppm vs GM.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bsncubed