Step 4.2: PTP-paced AES67 RTP sender with 1 kHz test tone

- aes67_tx: TX task woken by an esp_timer every packet time; sends every
  packet whose last sample is in the past (PTP time), RTP ts =
  (sample index from PTP + clk_offset) mod 2^32, packets aligned to
  multiples of the packet size. Sends only while PTP is locked; resyncs
  on lock, clock step or > 20 ms lag. L24/L16 big-endian, TTL/DSCP/
  multicast IF from config; a config save restarts TX.
- Built-in 1 kHz tone at -18 dBFS, phase from the PTP sample index;
  aes67_tx_set_source() pull callback for later sources (underruns
  counted, padded with silence). status: tx_packets, underruns.
- Verified with a receiver script on the PC: 1 ms L24 stereo 1000/s,
  0 gaps, ts step 48, tone -18.00 dBFS within 1.2 LSB of the ideal
  PTP-phased sine; also L16 mono 0.333 ms, 0.125 ms (8000/s) and 4 ms.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

This commit is contained in:

Ben Nicholson

2026-09-25 06:43:12 +10:00

parent 3d05768f00

commit bae6a8a2f9

4 changed files with 249 additions and 6 deletions

									
										main/main.c
									
		+1
		
												View File
												
				@@ -38,5 +38,6 @@ void app_main(void)

				    project_cfg_register();

				    ESP_ERROR_CHECK(aes67_ota_init());

				    ESP_ERROR_CHECK(aes67_sdp_sap_init());

				    ESP_ERROR_CHECK(aes67_tx_start());

				    ESP_ERROR_CHECK(aes67_web_start());

				}