When using two nRF5340 Audio DKs as bis_transmitter and bis_receiver respectively for the iso_time_sync sample, the iso_recv event is triggered.
However, in the respective callback, net_buf::len is 0, and the BT_ISO_FLAGS_VALID bit in bt_iso_recv_info::flags is not set.
Could you please tell me what I should configure or pay attention to?
00> *** Booting nRF Connect SDK v2.7.0-rc2-b2d45030365f *** 00> *** Using Zephyr OS v3.6.99-f047959a650c *** 00> Bluetooth ISO Time Sync Demo 00> [00:00:04.104,370] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002) 00> [00:00:04.104,400] <inf> bt_hci_core: HW Variant: nRF53x (0x0003) 00> [00:00:04.104,431] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 109.50488 Build 2560361275 00> [00:00:04.106,414] <inf> bt_hci_core: Identity: CD:A9:25:EE:E1:D1 (random) 00> [00:00:04.106,445] <inf> bt_hci_core: HCI: version 5.4 (0x0d) revision 0x21f3, manufacturer 0x0059 00> [00:00:04.106,475] <inf> bt_hci_core: LMP: version 5.4 (0x0d) subver 0x21f3 00> Choose role - cis_central (c) / cis_peripheral (p) / bis_transmitter (b) / bis_receiver (r) : r 00> Starting BIS receiver, BIS index 1 00> Scanning for periodic advertiser 00> Waiting for BigInfo 00> Synced to periodic advertiser 00> BigInfo received 00> Syncing to BIG index 1
(gdb) p buf->len
$15 = 0
(gdb) f
#4 0x00005966 in rx_work_handler (work=<optimized out>) at /opt/nordic/ncs/v2.7.0-rc2/zephyr/subsys/bluetooth/host/hci_core.c:4100
4100 hci_iso(buf);
(gdb) bt
#0 iso_recv (chan=0x200001f8 <iso_chan>, info=0x20002ce0 <iso_info_data>, buf=0x20008cbc <_net_buf_iso_rx_pool>) at /opt/nordic/ncs/v2.7.0-rc2/nrf/samples/bluetooth/iso_time_sync/src/iso_rx.c:59
#1 0x0000d2ac in bt_iso_recv (iso=iso@entry=0x200019c0 <iso_conns>, buf=buf@entry=0x20008cbc <_net_buf_iso_rx_pool>, flags=<optimized out>, flags@entry=2 '\002')
at /opt/nordic/ncs/v2.7.0-rc2/zephyr/subsys/bluetooth/host/iso.c:725
#2 0x00017298 in bt_conn_recv (conn=conn@entry=0x200019c0 <iso_conns>, buf=buf@entry=0x20008cbc <_net_buf_iso_rx_pool>, flags=flags@entry=2 '\002') at /opt/nordic/ncs/v2.7.0-rc2/zephyr/subsys/bluetooth/host/conn.c:417
#3 0x0000cee4 in hci_iso (buf=0x20008cbc <_net_buf_iso_rx_pool>) at /opt/nordic/ncs/v2.7.0-rc2/zephyr/subsys/bluetooth/host/iso.c:140
#4 0x00005966 in rx_work_handler (work=<optimized out>) at /opt/nordic/ncs/v2.7.0-rc2/zephyr/subsys/bluetooth/host/hci_core.c:4100
#5 0x00011a5e in work_queue_main (workq_ptr=0x20001310 <bt_workq>, p2=<optimized out>, p3=<optimized out>) at /opt/nordic/ncs/v2.7.0-rc2/zephyr/kernel/work.c:688
