References:
dongle发送给headset的spp指令格式
(PS：这部分指令的的接收可以在headset的app_dongle_spp_cback函数看到，但在dongle部分的发送指令源码似乎在sdk中看不到Σ(っ °Д °;)っ)
功能实现函数
headset部分
// headset和dongle连接且dongle判断到pc/cellphone正在通话中，则dongle
// 会向headset发送打开enable mic的spp指令
// 处理enable mic的spp指令的回调函数如下
static void app_dongle_spp_cback(T_BT_EVENT event_type, void *event_buf, uint16_t buf_len)
{
...
case BT_EVENT_SPP_DATA_IND:
{
...
// 此处判断Command type(Byte 3)是否为0x03，即DONGLE_CMD_REQ_OPEN_MIC
else if (p_data[3] == DONGLE_CMD_REQ_OPEN_MIC)
{
#if F_APP_APT_SUPPORT
uint8_t action = MMI_NULL;
#endif
// 此处判断Byte 4 为0x01(turn on mic)或0x00(turn off mic)
if (p_data[4] == 1)
{
app_dongle_updata_mic_data_idx(true);
app_transfer_queue_reset(CMD_PATH_SPP);
#if F_APP_APT_SUPPORT
if (app_cfg_const.normal_apt_support &&
app_apt_is_apt_on_state((T_ANC_APT_STATE)app_db.current_listening_state))
{
action = MMI_AUDIO_APT;
app_db.dongle_is_disable_apt = true;
app_dongle_control_apt(action);
}
#endif
app_bt_policy_qos_param_update(app_db.br_link[app_idx].bd_addr, BP_TPOLL_SPP_ENABLE);
#if F_APP_24G_BT_AUDIO_SOURCE_CTRL_SUPPORT
if ((app_cfg_const.enable_24g_bt_audio_source_switch
&& (app_cfg_nv.allowed_source != ALLOWED_SOURCE_24G))
|| (app_hfp_get_call_status() != APP_CALL_IDLE))
{
// not to start recording, restore recording if needed.
app_db.restore_dongle_recording = true;
}
else
#endif
{
app_dongle_update_is_mic_enable(true);
app_dongle_start_recording(app_db.br_link[app_idx].bd_addr);
}
}
else
{
app_db.restore_dongle_recording = false;
app_dongle_updata_mic_data_idx(true);
app_dongle_update_is_mic_enable(false);
app_dongle_stop_recording(app_db.br_link[app_idx].bd_addr);
app_bt_policy_qos_param_update(app_db.br_link[app_idx].bd_addr, BP_TPOLL_SPP_DISABLE);
#if F_APP_APT_SUPPORT
if (app_db.dongle_is_disable_apt &&
(!app_apt_is_apt_on_state((T_ANC_APT_STATE)app_db.current_listening_state)))
{
action = MMI_AUDIO_APT;
app_db.dongle_is_disable_apt = false;
app_dongle_control_apt(action);
}
#endif
}
}
else if (p_data[3] == DONGLE_CMD_SET_VOL_BALANCE)
{
if (p_data[4] == 1) // dongle to earphone
{
// update record
app_db.gaming_balance = p_data[5];
app_db.chat_balance = p_data[6];
app_dongle_volume_balance_report(DONGLE_CMD_ACK);
}
}
else if (p_data[3] == DONGLE_CMD_CTRL_RAW_DATA)
{
app_dongle_rcv_ctrl_data(p_data + 4, data_len - 4);
}
else if (p_data[3] == DONGLE_CMD_PASS_THROUGH_DATA)
{
if (p_data[4] == CMD_SYNC_BYTE) //AudioConnect cmd header check
{
uint16_t cmd_len = (p_data[6] | (p_data[7] << 8)) + 4; //sync_byte, seqn, length_low, length_high
uint8_t seqn = p_data[5];
APP_PRINT_TRACE2("app_dongle_cmd_pass_through: 0x%02X, 0x%02X", cmd_len, seqn);
app_cmd_handler(&p_data[8], (cmd_len - 4), CMD_PATH_SPP, seqn, app_idx);
}
}
#endif
#if F_APP_CFU_SPP_SUPPORT
else if (p_data[3] == DONGLE_CMD_CFU_DATA)
{
T_APP_CFU_DATA cfu_data;
memcpy(cfu_data.spp_data.bd_addr, param->spp_data_ind.bd_addr, 6);
if (app_cfu_spp_header_parse(payload_len - 1, p_data + 4, &cfu_data))
{
app_cfu_handle_report(cfu_data.spp_data.report_id, APP_CFU_REPORT_SOURCE_SPP, &cfu_data);
}
}
#endif
#if F_APP_CUSTOMIZED_SBC_VP_FLOW_SUPPORT
else if (p_data[3] == DONGLE_CMD_ERASE_FLASH)
{
//Do erase & Send ack
app_dongle_receive_erase_cmd(p_data + 4);
}
else if (p_data[3] == DONGLE_CMD_WRITE_CUSTOMIZED_VP)
{
//Do write & Send ack
app_dongle_receive_customized_vp_data(payload_len - 1, p_data + 4);
}
else if (p_data[3] == DONGLE_CMD_WRITE_VP_FINISH)
{
//Dongle notifies write finish
app_dongle_write_vp_finish();
}
#endif
}
}
}
}
}
break;
}
连接dongle通话headset自动打开mic log
0008451 06-03#16:59:28.948 064 0044991.291 [BTM] bt_mgr_dispatch: msg 0x0704
0008452 06-03#16:59:28.948 065 0044991.315 [BTM] !**bt_mgr_event_post: event_type 0x3005
0008453 06-03#16:59:28.948 066 0044991.434 [PROFILE] !**spp_send_credit: addr[11::22::33::44::55::FE] server chann[0x11] credit[1]
0008454 06-03#16:59:28.948 067 0044991.490 [RFCOMM] rfc_data_cfm: dlci 0x22, given credits 1
0008455 06-03#16:59:28.948 068 0044991.510 [APP] app_dongle_spp_cback: 0x01, 0x02
0008456 06-03#16:59:28.948 069 0044991.535 [APP] !**app_dongle_spp_cback 52, 01, 02, 03, 01, 54,
0008457 06-03#16:59:28.948 070 0044991.655 [APP] !!*app_stop_timer: handle error 0, pointer 0x2c13f0
0008458 06-03#16:59:28.948 071 0044991.961 [APP] app_bt_policy_qos_param_update: event 18, sco 0, a2dp_idx 0, avrcp 1, stream 1, active_tpoll 0, inactive_idx 4, bau_idx 4
0008459 06-03#16:59:28.948 072 0044991.979 [APP] app_bt_policy_qos_param_update: enable_mic 0, gaming 1
0008460 06-03#16:59:28.948 073 0044992.014 [APP] app_dongle_update_is_mic_enable: 1
0008461 06-03#16:59:28.948 080 0044994.235 [APP] !**app_dongle_start_recording
dongle部分
该部分代码涉及到usb部分知识，因为不熟悉usb所以无能为力，但是在log部分可以看到一些通话开启时usb的状态变化
Line 8607: 0008607 06-27#16:19:18.743 160 0029084.647 [USB] !**usb_audio_driver_streaming_activate:dir:1,bit_width:16, cur_sample_rate:48000, chann_num:2, sample_rate_max_tolerance:48000
Line 8633: 0008633 06-27#16:19:18.757 188 0029091.647 [APP] !**ds_moniter_timeout_handle: set ds_streaming true
Line 19702: 0019702 06-27#16:19:33.031 132 0043350.966 [USB] !**usb_audio_driver_streaming_deactivate:1