bsncubed
e2f4d81326
- 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>
8 lines
192 B
C
8 lines
192 B
C
// PTPv2 ordinary clock over UDP/IPv4 (E2E). Step 3.2: TimeReceiver measurement only.
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#pragma once
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#include "esp_err.h"
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#include "esp_netif.h"
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esp_err_t ptp_clock_start(esp_netif_t *netif);
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