channel sounding

[mike_al]

Dear Technical Support Team,

I have recently been developing with the nRF54L15-DK development board, using the official channel_sounding/cs_test example provided by Nordic.

Normal communication works only when I configure Main_mode = mode_2 and Sub_mode = mode_1.

All other mode combinations result in errors, as listed below:

• Configuring Main_mode = mode_2, Sub_mode = none → returns err-22 (EINVAL)
• Configuring Main_mode = mode_1, Sub_mode = none → returns err-22 (EINVAL)
• Configuring Main_mode = mode_3, Sub_mode = none → returns err-22 (EINVAL)
• Configuring Main_mode = mode_2, Sub_mode = mode_3 → returns err-5 (EIO)
• Configuring Main_mode = mode_3, Sub_mode = mode_2 → returns err-5 (EIO)

[mike_al]

Configuration as follows： 

 

    struct bt_le_cs_test_param params;

    params.role = role;

    params.main_mode = BT_CONN_LE_CS_MAIN_MODE_2;

    params.sub_mode = BT_CONN_LE_CS_SUB_MODE_UNUSED;

    params.main_mode_repetition = 1;

    params.mode_0_steps = 3;

    params.rtt_type = BT_CONN_LE_CS_RTT_TYPE_AA_ONLY;

    params.cs_sync_phy = BT_CONN_LE_CS_SYNC_1M_PHY;

    params.cs_sync_antenna_selection = BT_LE_CS_TEST_CS_SYNC_ANTENNA_SELECTION_ONE;

    params.subevent_len = 5000;

    params.subevent_interval = 0;

    params.max_num_subevents = 1;

    params.transmit_power_level = BT_HCI_OP_LE_CS_TEST_MAXIMIZE_TX_POWER;

    params.t_ip1_time = 145;

    params.t_ip2_time = 145;

    params.t_fcs_time = 150;

    params.t_pm_time = 40;

    params.t_sw_time = 0;

    params.tone_antenna_config_selection = BT_LE_CS_TONE_ANTENNA_CONFIGURATION_A1_B1;

    params.initiator_snr_control = BT_LE_CS_SNR_CONTROL_NOT_USED;

    params.reflector_snr_control = BT_LE_CS_SNR_CONTROL_NOT_USED;

    params.drbg_nonce = 0x1234;

    params.override_config = BIT(2) | BIT(5);

    params.override_config_0.channel_map_repetition = 1;

    memset(params.override_config_0.not_set.channel_map, 0, 10);

    for (uint8_t i = 40; i < 75; i++) {

        BT_LE_CS_CHANNEL_BIT_SET_VAL(params.override_config_0.not_set.channel_map, i, 1);

    }

    params.override_config_0.not_set.channel_selection_type = BT_CONN_LE_CS_CHSEL_TYPE_3B;

    params.override_config_0.not_set.ch3c_shape = BT_CONN_LE_CS_CH3C_SHAPE_HAT;

    params.override_config_0.not_set.ch3c_jump = 2;

    params.override_config_2.main_mode_steps = 8;

    params.override_config_5.cs_sync_aa_initiator = 0x4D7B8A2F;

    params.override_config_5.cs_sync_aa_reflector = 0x96F93DB1
;

    return params;