飛凌 OK113i-C 全志T113-i開發(fā)板板載一個(gè)RTL8723du wifi/藍(lán)牙二合一模塊，板子出廠已經(jīng)移植好了WIFI驅(qū)動(dòng)但是藍(lán)牙驅(qū)動(dòng)沒有，所以這篇文章我們主要做藍(lán)牙驅(qū)動(dòng)的移植和功能驗(yàn)證。

复制./build.sh menuconfig

在复制Device Drivers > Network device support > Wireless LAN下找到复制Realtek 8723D USB WiFi選項(xiàng)。

默認(rèn)是開啟的。

默認(rèn)WIFI驅(qū)動(dòng)聯(lián)網(wǎng)嘗試

复制wpa_supplicant -Dnl80211 -iwlan0 -c /etc/wpa_supplicant.conf -B
udhcpc -i wlan0
udhcpc: started, v1.29.3                                                                                           
udhcpc: sending discover                                                                                           
udhcpc: sending select for 192.168.0.111                                                                           
udhcpc: lease of 192.168.0.111 obtained, lease time 7200                                                           
deleting routers                                                                                                   
adding dns 192.168.1.1                                                                                             
adding dns 192.168.0.1

wpa_supplicant.conf 文件

复制network={
        ssid="TP-LINK_142C"
        psk="123445678"
}
update_config=1
ctrl_interface=DIR=/var/run/wpa_supplicant

打印網(wǎng)卡信息：

复制ifconfig                                                                                         
eth0      Link encap:Ethernet  HWaddr BA:E9:F2:1C:9D:87                                                            
          inet addr:192.168.0.232  Bcast:0.0.0.0  Mask:255.255.255.0                                               
          UP BROADCAST MULTICAST  MTU:1500  Metric:1                                                               
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0                                                       
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0                                                     
          collisions:0 txqueuelen:1000                                                                             
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)                                                                   
          Interrupt:39                                                                                             
                                                                                                                   
lo        Link encap:Local Loopback                                                                                
          inet addr:127.0.0.1  Mask:255.0.0.0                                                                      
          inet6 addr: ::1/128 Scope:Host                                                                           
          UP LOOPBACK RUNNING  MTU:65536  Metric:1                                                                 
          RX packets:41 errors:0 dropped:0 overruns:0 frame:0                                                      
          TX packets:41 errors:0 dropped:0 overruns:0 carrier:0                                                    
          collisions:0 txqueuelen:1000                                                                             
          RX bytes:3936 (3.8 KiB)  TX bytes:3936 (3.8 KiB)                                                         
                                                                                                                   
wlan0     Link encap:Ethernet  HWaddr 2C:C3:E6:67:4D:3B                                                            
          inet addr:192.168.0.111  Bcast:192.168.0.255  Mask:255.255.255.0                                         
          inet6 addr: fe80::2ec3:e6ff:fe67:4d3b/64 Scope:Link                                                      
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1                                                       
          RX packets:86 errors:0 dropped:0 overruns:0 frame:0                                                      
          TX packets:19 errors:0 dropped:0 overruns:0 carrier:0                                                    
          collisions:0 txqueuelen:1000                                                                             
          RX bytes:17189 (16.7 KiB)  TX bytes:3763 (3.6 KiB)

至此，wifi連接路由器成功，可以ping 百度驗(yàn)證是否聯(lián)網(wǎng)成功。

藍(lán)牙功能

首先打印設(shè)備上的藍(lán)牙設(shè)備

复制hciconfig -a

輸出為空，應(yīng)該是沒有藍(lán)牙驅(qū)動(dòng)。看來出廠并沒有帶藍(lán)牙驅(qū)動(dòng)，下一步自行移植藍(lán)牙驅(qū)動(dòng)，板上的無線芯片模組使用的是rtl8723du是一款bt4.2和 wifi 2.4G芯片。

藍(lán)牙驅(qū)動(dòng)移植

1. 修改kernel config
   修改复制OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig文件添加如下一行

复制CONFIG_BT_HCIBTUSB_RTLBTUSB=m

2. 修改Kconfig
   添加如下：

复制config BT_HCIBTUSB_RTLBTUSB
        tristate "Realtek HCI USB driver support"
        depends on USB
        help
          Realtek Bluetooth HCI USB driver.
          This driver is required if you want to use Realtek Bluetooth
          device with USB interface.
          Say Y here to compile support for Bluetooth USB devices into the
          kernel or say M to compile it as module (rtk_btusb).

3. 修改Makefile
   在文檔最后添加：

复制obj-$(CONFIG_BT_HCIBTUSB_RTLBTUSB)    := rtk_btusb.o
rtk_btusb-objs                        := rtk_bt.o rtk_misc.o rtk_coex.o

4. 將驅(qū)動(dòng)文件中如下文件復(fù)制到內(nèi)核目錄复制OK113i-linux-sdk/kernel/linux-5.4/drivers/bluetooth下：
   rtk_bt.c
   rtk_bt.h
   rtk_coex.c
   rtk_coex.h
   rtk_misc.c
   rtk_misc.h
5. 編譯內(nèi)核驅(qū)動(dòng)
   ./build.sh kernel

編譯完成后會(huì)在复制OK113i-linux-sdk/out/t113_i/ok113i/longan/dist目錄下生成复制rtk_btusb.ko驅(qū)動(dòng)文件，將該驅(qū)動(dòng)文件和驅(qū)動(dòng)文件對應(yīng)的固件文件（rtl8723du_fw.bin和rtl8723du_config.bin）放在板子复制/lib/firmware/下

為了方便查看驅(qū)動(dòng)加載過程報(bào)錯(cuò)信息，打開內(nèi)核打印信息：

复制echo 8 4 1 7 > /proc/sys/kernel/printk

將編譯好的驅(qū)動(dòng)文件和固件文件上傳到板卡上，并將估計(jì)文件存放在板卡复制/lib/firmware目錄下。

复制scp out/t113_i/ok113i/longan/dist/rtk_btusb.ko root@192.168.0.105:/home/forlinx/
scp /home/luoyang/Documents/Dev/Bluetooth/V4-8761藍(lán)牙_Linux驅(qū)動(dòng)/20210819_LINUX_BT_DRIVER/rtkbt-firmware/lib/firmware/rtl8723du* root@192.168.0.105:/home/forlinx/
cp rtl8723du_config /lib/firmware/rtl8723du_config.bin
cp rtl8723du_fw /lib/firmware/rtl8723du_fw.bin

加載驅(qū)動(dòng)試試，報(bào)錯(cuò)：

复制insmod rtk_btusb.ko 
[ 4832.222554] rtk_btusb: module uses symbol (kernel_read) from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
[ 4832.238042] rtk_btusb: Unknown symbol kernel_read (err -22)
[ 4832.298908] rtk_btusb: module uses symbol (kernel_read) from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
[ 4832.314387] rtk_btusb: Unknown symbol kernel_read (err -22)
insmod: can't insert 'rtk_btusb.ko': Invalid argument

在rtk_bt.c文件最后一行添加：

复制MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);

重新編譯驅(qū)動(dòng)，然后上傳并加載試試。

复制root@ok113i:/home/forlinx# insmod rtk_btusb.ko 
[ 7964.303169] rtk_btusb: Realtek Bluetooth USB driver ver 3.1.32e1d0b.20210819-170430
[ 7964.311850] rtk_btcoex: rtk_btcoex_init: version: 1.2
[ 7964.317513] rtk_btcoex: create workqueue
[ 7964.322343] rtk_btcoex: alloc buffers 1408, 2240 for ev and l2
[ 7964.329075] rtk_btusb: btusb_probe intf- >cur_altsetting- >desc.bInterfaceNumber 0
[ 7964.337365] rtk_btusb: btusb_probe can_wakeup 1, may wakeup 0
[ 7964.343827] rtk_btusb: patch_add
[ 7964.347451] rtk_btusb: auto suspend is disabled
[ 7964.352568] rtk_btusb: pid = 0xd723
[ 7964.356478] rtk_btusb: patch_add: Reset gEVersion to 0xff
[ 7964.362590] rtk_btusb: set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev- >quirks);
[ 7964.370965] rtk_btusb: btusb_probe: done
[ 7964.375679] usbcore: registered new interface driver rtk_btusb
[ 7964.377514] rtk_btusb: btusb_open start
[ 7964.386578] rtk_btusb: btusb_open hdev- >promisc ==0
[ 7964.392129] rtk_btusb: download_patch start
root@ok113i:/home/forlinx# [ 7964.396839] rtk_btusb: chip type value: 0x71
[ 7964.403997] rtk_btusb: HCI reset.
[ 7964.416814] rtk_btusb: read_ver_rsp- >lmp_subver = 0x8723
[ 7964.423054] rtk_btusb: read_ver_rsp- >hci_rev = 0xd
[ 7964.428449] rtk_btusb: patch_entry- >lmp_sub = 0x8723
[ 7964.434017] rtk_btusb: load_firmware start
[ 7964.438638] rtk_btusb: lmp_version = 0x8723
[ 7964.443325] rtk_btusb: config filename rtl8723du_config
[ 7964.449952] rtk_btusb: no bdaddr file /opt/bdaddr
[ 7964.455252] rtk_btusb: Origin cfg len 22
[ 7964.459688] rtk_btusb: 55 ab 23 87 10 00 d9 00 01 0f e4 00 01 08 8d 00
[ 7964.467005] rtk_btusb: 01 fa 8f 00 01 bf
[ 7964.471497] rtk_btusb: New cfg len 22
[ 7964.475600] rtk_btusb: 55 ab 23 87 10 00 d9 00 01 0f e4 00 01 08 8d 00
[ 7964.482969] rtk_btusb: 01 fa 8f 00 01 bf
[ 7964.487399] rtk_btusb: fw name is  rtl8723du_fw
[ 7964.492801] rtk_btusb: This is not 8723a, use new patch style!
[ 7964.499374] rtk_btusb: rtk_get_eversion: gEVersion 255
[ 7964.505815] rtk_btusb: eversion- >status = 0x0, eversion- >version = 0x2
[ 7964.513566] rtk_btusb: load_firmware: New gEVersion 2
[ 7964.519331] rtk_btusb: rtk_get_fw_project_id: opcode 0, len 1, data 9
[ 7964.526565] rtk_btusb: lmp_version is 8723, project_id is 8723, match!
[ 7964.533909] rtk_btusb: fw_version = 0x82a8a133
[ 7964.538921] rtk_btusb: number_of_total_patch = 3
[ 7964.544092] rtk_btusb: chipID 3
[ 7964.547606] rtk_btusb: patch_length 0x889c
[ 7964.552220] rtk_btusb: start_offset 0x00004940
[ 7964.557198] rtk_btusb: Svn version: -1433992835
[ 7964.562301] rtk_btusb: Coexistence: BTCOEX_20210106-3b3b
[ 7964.568274] rtk_btusb: buf_len = 0x88b2
[ 7964.572647] rtk_btusb: fw: exists, config file: exists
[ 7964.578430] rtk_btusb: load_firmware done
[ 7964.582960] rtk_btusb: download_data start
[ 7964.855824] rtk_btusb: download_data done
[ 7964.860346] rtk_btusb: HCI reset.
[ 7964.873812] rtk_btusb: read_ver_rsp- >lmp_subver = 0xa133
[ 7964.880054] rtk_btusb: read_ver_rsp- >hci_rev = 0x82a8
[ 7964.885730] rtk_btusb: patch_entry- >lmp_sub = 0x8723
[ 7964.891337] rtk_btusb: Rtk patch end 0
[ 7964.895538] rtk_btusb: btusb_open set HCI_RUNNING
[ 7964.900945] rtk_btcoex: Open BTCOEX
[ 7964.904856] rtk_btusb: btusb_open end
[ 7964.911832] rtk_btcoex: BTCOEX hci_rev 0x82a8
[ 7964.916883] rtk_btcoex: BTCOEX lmp_subver 0xa133
[ 7964.943829] rtk_btusb: btusb_notify: hci0 evt 3
[ 7967.007992] rtk_btusb: btusb_flush add delay 
[ 7967.022915] rtk_btusb: btusb_close
[ 7967.045574] rtk_btcoex: Close BTCOEX
[ 7967.049615] rtk_btcoex: -x

以上信息說明藍(lán)牙驅(qū)動(dòng)加載成功。
此時(shí)，再一次查看系統(tǒng)的藍(lán)牙設(shè)備信息會(huì)打印如下：

复制root@ok113i:/home/forlinx# hciconfig -a
hci0:   Type: Primary  Bus: USB
        BD Address: 2C:C3:E6:67:4D:3C  ACL MTU: 1021:8  SCO MTU: 255:12
        DOWN 
        RX bytes:584 acl:0 sco:0 events:30 errors:0
        TX bytes:369 acl:0 sco:0 commands:30 errors:0
        Features: 0xff 0xff 0xff 0xfa 0xdb 0xbd 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
        Link policy: RSWITCH HOLD SNIFF PARK 
        Link mode: SLAVE ACCEPT

藍(lán)牙工具軟件使用

藍(lán)牙驅(qū)動(dòng)安裝成功后就可以對藍(lán)牙設(shè)備進(jìn)行配對連接并進(jìn)行播放音頻操作了，此處我們選擇通過藍(lán)牙連接家里的智能音箱天貓精靈作為藍(lán)牙音頻輸出設(shè)備，涉及的藍(lán)牙工具軟件開發(fā)板上出廠移植好了，所以此處省去了移植這些工具軟件的步驟。

1. 啟動(dòng)系統(tǒng)藍(lán)牙服務(wù)复制bluetoothd，使其在后臺(tái)運(yùn)行
   bluetoothd -d -n &
   root@ok113i:/# bluetoothd[1516]: Bluetooth daemon 5.50
   bluetoothd[1516]: src/adapter.c:adapter_init() sending read version command
   bluetoothd[1516]: Starting SDP server
   bluetoothd[1516]: src/sdpd-service.c:register_device_id() Adding device id record for 0002:1d6b:0246:0532
   bluetoothd[1516]: src/plugin.c:plugin_init() Loading builtin plugins
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading hostname plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading wiimote plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading autopair plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading policy plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading neard plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading sap plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading a2dp plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading avrcp plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading network plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading input plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading hog plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading health plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading gap plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading scanparam plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading deviceinfo plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading midi plugin
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading battery plugin
   bluetoothd[1516]: src/plugin.c:plugin_init() Loading plugins /usr/lib/bluetooth/plugins
   bluetoothd[1516]: src/plugin.c:add_plugin() Loading sixaxis plugin
   bluetoothd[1516]: profiles/health/hdp.c:hdp_manager_start() Starting Health manager
   bluetoothd[1516]: profiles/input/suspend-none.c:suspend_init()
   bluetoothd[1516]: profiles/network/manager.c:read_config() Config options: Security=true
   bluetoothd[1516]: kernel lacks bnep-protocol support
   bluetoothd[1516]: System does not support network plugin
   bluetoothd[1516]: plugins/neard.c:neard_init() Setup neard plugin
   bluetoothd[1516]: plugins/sixaxis.c:sixaxis_init()
   bluetoothd[1516]: src/main.c:main() Entering main loop
   bluetoothd[1516]: src/rfkill.c:rfkill_event() RFKILL event idx 0 type 1 op 0 soft 0 hard 0
   bluetoothd[1516]: Bluetooth management interface 1.14 initialized
   bluetoothd[1516]: src/adapter.c:read_version_complete() sending read supported commands command
   bluetoothd[1516]: src/adapter.c:read_version_complete() sending read index list command
   bluetoothd[1516]: src/adapter.c:read_commands_complete() Number of commands: 65
   bluetoothd[1516]: src/adapter.c:read_commands_complete() Number of events: 35
   bluetoothd[1516]: src/adapter.c:read_commands_complete() enabling kernel-side connection control
   bluetoothd[1516]: src/adapter.c:read_index_list_complete() Number of controllers: 0
   root@ok113i:/#

2. 通過复制bluetoothctl對藍(lán)牙設(shè)備操作，主要包括：藍(lán)牙設(shè)備信息打印查看，藍(lán)牙設(shè)備開啟和關(guān)閉、藍(lán)牙外設(shè)掃描、查看掃描到的藍(lán)牙外設(shè)設(shè)備、配對連接等，下面實(shí)例命令行中复制##開頭的行是注釋

   進(jìn)入bluetoothctl

   root@ok113i:/# bluetoothctl
   bluetoothd[1516]: src/agent.c:agent_ref() 0x8c9338: ref=1
   bluetoothd[1516]: src/agent.c:register_agent() agent :1.1
   Agent registered

   藍(lán)牙設(shè)備信息打印查看

   [bluetooth]#show
   Controller 2C:C3:E6:67:4D:3C (public)

   复制Name: BlueZ 5.50
       Alias: BlueZ 5.50
       Class: 0x00000000
       Powered: no
       Discoverable: no
       Pairable: yes
       UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
       UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
       UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
       UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
       UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
       Modalias: usb:v1D6Bp0246d0532
       Discovering: no
   

   藍(lán)牙設(shè)備開啟和關(guān)閉

   [bluetooth]#power on
   [bluetooth]# [ 417.686414] rtk_btusb: btusb_open start
   bluetoothd[1516]: src/adapter.c:[ 417.691880] rtk_btusb: btusb_open hdev->promisc ==0
   property_set_mode() sending Set [ 417.700202] rtk_btusb: download_patch start
   Powered command for index 0
   [ 417.707637] rtk_btusb: chip type value: 0x71
   [ 417.714939] rtk_btusb: HCI reset.
   [ 417.727699] rtk_btusb: read_ver_rsp->lmp_subver = 0xa133
   [ 417.733654] rtk_btusb: read_ver_rsp->hci_rev = 0x82a8
   [ 417.739344] rtk_btusb: patch_entry->lmp_sub = 0x8723
   [ 417.744905] rtk_btusb: Firmware already exists
   [ 417.749914] rtk_btusb: Rtk patch end 1
   [ 417.754125] rtk_btusb: btusb_open set HCI_RUNNING
   [ 417.759504] rtk_btcoex: Open BTCOEX
   [ 417.763412] rtk_btusb: btusb_open end
   [ 417.769720] rtk_btcoex: BTCOEX hci_rev 0x82a8
   [ 417.774656] rtk_btcoex: BTCOEX lmp_subver 0xa133
   bluetoothd[1516]: src/adapter.c:property_set_mode_complete() Success (0x00)
   bluetoothd[1516]: src/adapter.c:new_settings_callback() Settings: 0x00000ad1
   bluetoothd[1516]: src/adapter.c:settings_changed() Changed settings: 0x00000001
   bluetoothd[1516]: src/adapter.c:adapter_start() adapter /org/bluez/hci0 has been enabled
   bluetoothd[1516]: src/adapter.c:trigger_passive_scanning()
   Changing power on succeeded
   [CHG] Controller 2C:C3:E6:67:4D:3C Powered: yes

   藍(lán)牙設(shè)備開啟和關(guān)閉

   [bluetooth]#scan on
   [bluetooth]#scan off

   查看掃描到的藍(lán)牙外設(shè)設(shè)備

   [bluetooth]#devices
   Device F1:22:33:1A:48:9B F1-22-33-1A-48-9B
   Device C4:DE:E2:DF:E8:22 Keep_CC_50200973
   Device 34:29:EF:5B:D2:D3 34-29-EF-5B-D2-D3
   Device E8:F5:63:87:03:9D Mi Band 3
   Device B8:8C:29:87:72:C9 midea
   Device 04:7F:0E:40:4A:BD BEIJING-EU5
   Device CC:B5:D1:FB:45:3A SMI-M14
   Device 45:B8:CC:87:53:F8 45-B8-CC-87-53-F8
   Device 84:7C:9B:6D:FF:11 midea_db_2943
   Device 10:9E:3A:92:2E:DA ?方?糖(80:7A)

   配對連接

   [bluetooth]#connect 10:9E:3A:92:2E:DA
   Attempting to connect to 10:9E:3A:92:2E:DA
   bluetoothd[1516]: src/device.c:connect_profiles() /org/bluez/hci0/dev_10_9E_3A_92_2E_DA (all), client :1.2
   bluetoothd[1516]: profiles/audio/a2dp.c:a2dp_sink_connect() path /org/bluez/hci0/dev_10_9E_3A_92_2E_DA
   bluetoothd[1516]: a2dp-sink profile connect failed for 10:9E:3A:92:2E:DA: Protocol not available
   Failed to connect: org.bluez.Error.Failed

報(bào)錯(cuò)了，因?yàn)闆]有提前運(yùn)行复制bluealsa這個(gè)程序，運(yùn)行如下：

复制bluealsa -p a2dp-source &
[2] 1537
root@ok113i:/home/forlinx# bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_register_sep() SEP 0x8cc378 registered: type:0 codec:2 seid:1
bluetoothd[1516]: src/adapter.c:adapter_service_add() /org/bluez/hci0
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Adding record with handle 0x10003
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Record pattern UUID 00000019-0000-1000-8000-00805f9
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Record pattern UUID 00000100-0000-1000-8000-00805f9
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Record pattern UUID 00001002-0000-1000-8000-00805f9
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Record pattern UUID 0000110a-0000-1000-8000-00805f9
bluetoothd[1516]: src/sdpd-service.c:add_record_to_server() Record pattern UUID 0000110d-0000-1000-8000-00805f9
bluetoothd[1516]: src/adapter.c:adapter_service_insert() /org/bluez/hci0
bluetoothd[1516]: src/adapter.c:add_uuid() sending add uuid command for index 0
bluetoothd[1516]: Endpoint registered: sender=:1.3 path=/A2DP/MPEG24/Source/1
bluetoothd[1516]: src/adapter.c:dev_class_changed_callback() Class: 0x080000
bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_register_sep() SEP 0x8c63f0 registered: type:0 codec:0 seid:2
bluetoothd[1516]: Endpoint registered: sender=:1.3 path=/A2DP/SBC/Source/1

至此，再進(jìn)入bluetoothctl 連接天貓精靈試試，首先輸入复制devices命令打印出掃描到的設(shè)備信息，然后使用复制connect xx:xx:xx:xx:xx:xx連接上想要連接的藍(lán)牙設(shè)備，連接成功后提示符會(huì)變成复制[連接的設(shè)備]樣式，具體如下：

复制[bluetooth]#devices
Device F1:22:33:1A:48:9B F1-22-33-1A-48-9B
Device C4:DE:E2:DF:E8:22 Keep_CC_50200973
Device 34:29:EF:5B:D2:D3 34-29-EF-5B-D2-D3
Device E8:F5:63:87:03:9D Mi Band 3
Device B8:8C:29:87:72:C9 midea
Device 04:7F:0E:40:4A:BD BEIJING-EU5
Device CC:B5:D1:FB:45:3A SMI-M14
Device 45:B8:CC:87:53:F8 45-B8-CC-87-53-F8
Device 84:7C:9B:6D:FF:11 midea_db_2943
Device 10:9E:3A:92:2E:DA ?方?糖(80:7A)
[bluetooth]#connect 10:9E:3A:92:2E:DA
...
[?方?糖(80:7A)]# list
Controller 2C:C3:E6:67:4D:3C BlueZ 5.50 [default]
## 退出bluetoothctl程序
[?方?糖(80:7A)]# exit

3. 藍(lán)牙音頻播放
   因?yàn)榇颂幬覀兪褂?code>alsa-utils工具集中的 aplay 進(jìn)行音頻播放測試，所以僅僅支持复制PCM和复制WAV等音頻格式，要是想直接播放 mp3 或者 mp4 等格式音頻文件需要借助复制MPD或者复制FFmpeg等軟件。
   上一步我們在bluetoothctl中打印掃描并連接了藍(lán)牙音箱，藍(lán)牙音箱的設(shè)備地址如下：

复制[bluetooth]#devices
Device F1:22:33:1A:48:9B F1-22-33-1A-48-9B
Device C4:DE:E2:DF:E8:22 Keep_CC_50200973
Device 34:29:EF:5B:D2:D3 34-29-EF-5B-D2-D3
Device E8:F5:63:87:03:9D Mi Band 3
Device B8:8C:29:87:72:C9 midea
Device 04:7F:0E:40:4A:BD BEIJING-EU5
Device CC:B5:D1:FB:45:3A SMI-M14
Device 45:B8:CC:87:53:F8 45-B8-CC-87-53-F8
Device 84:7C:9B:6D:FF:11 midea_db_2943
Device 10:9E:3A:92:2E:DA ?方?糖(80:7A)

根據(jù)上面信息我們可以看到天貓精靈方糖的藍(lán)牙設(shè)備地址是复制10:9E:3A:92:2E:DA ，所以我們可以使用如下命令進(jìn)行音頻播放測試：

复制root@ok113i:/# aplay -D bluealsa:DEV=10:9E:3A:92:2E:DA ./wishforyou.wav

Playing WAVE './wishforyou.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
bluetoothd[1516]: profiles/audio/transport.c:media_owner_create() Owner created: sender=:1.3
bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_ref() 0x8cf3c0: ref=2
bluetoothd[1516]: profiles/audio/a2dp.c:a2dp_sep_lock() SEP 0x8c63f0 locked
bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_ref() 0x8cf3c0: ref=3
bluetoothd[1516]: profiles/audio/a2dp.c:setup_ref() 0x8ccad0: ref=1
bluetoothd[1516]: profiles/audio/transport.c:transport_set_state() State changed /org/bluez/hci0/dev_10_9E_3A_92_2E_DA/fd0: TRANSPORT_STATE_IDLE - > TRANSPORT_STATE_REQUESTING
bluetoothd[1516]: profiles/audio/transport.c:media_request_create() Request created: method=Acquire id=4
bluetoothd[1516]: profiles/audio/transport.c:media_owner_add() Owner :1.3 Request Acquire
bluetoothd[1516]: profiles/audio/transport.c:media_transport_set_owner() Transport /org/bluez/hci0/dev_10_9E_3A[ 1901.267056] rtk_btcoex: update_profile_state: btrtl_coex.prof4
_92_2E_DA/fd0 Owner :1.3
blueto[ 1901.276315] rtk_btcoex: update_profile_state: btrtl_coex.profile_status = 4
othd[1516]: profiles/audio/avdtp[ 1901.287222] rtk_btcoex: rtk_notify_profileinfo_to_fw: BufferSize 5
.c:session_cb() 
bluetoothd[151[ 1901.296656] rtk_btcoex: rtk_notify_profileinfo_to_fw: NumberOfHandles 1
6]: profiles/audio/avdtp.c:avdtp[ 1901.307101] rtk_btcoex: rtk_notify_profileinfo_to_fw: handle 0x0003
_parse_resp() START request succ[ 1901.316801] rtk_btcoex: rtk_notify_profileinfo_to_fw: profile_bitmap 0x04
eeded
bluetoothd[1516]: profile[ 1901.327316] rtk_btcoex: rtk_notify_profileinfo_to_fw: profile_status 0x04
s/audio/a2dp.c:start_cfm() Sourc[ 1901.337472] rtk_btcoex: rtk_vendor_cmd_to_fw: opcode 0xfc19
e 0x8c63f0: Start_Cfm
bluetooth[ 1901.346663] rtk_btcoex: Length 629
d[1516]: /org/bluez/hci0/dev_10_[ 1901.353083] rtk_btcoex: rtp: v 2, cc 0, pt 96
9E_3A_92_2E_DA/fd0: fd(20) ready[ 1901.360767] rtk_btcoex: syncword: 9c

bluetoothd[1516]: profiles/aud[ 1901.367663] rtk_btcoex: freq 48kHz
io/transport.c:media_owner_remov[ 1901.374144] rtk_btcoex: blocks 16
e() Owner :1.3 Request Acquire
[ 1901.380646] rtk_btcoex: channel mode JOINT_STEREO
bluetoothd[1516]: profiles/audio[ 1901.388829] rtk_btcoex: allocation method LOUDNESS
/transport.c:transport_set_state[ 1901.396877] rtk_btcoex: subbands 8
() State changed /org/bluez/hci0[ 1901.403488] rtk_btcoex: bitpool 32
/dev_10_9E_3A_92_2E_DA/fd0: TRAN[ 1901.410192] rtk_btcoex: rtk_vendor_cmd_to_fw: opcode 0xfc51
SPORT_STATE_REQUESTING - > TRANSPORT_STATE_ACTIVE
bluetoothd[1516]: profiles/audio/a2dp.c:setup_unref() 0x8ccad0: ref=0
bluetoothd[1516]: profiles/audio/a2dp.c:setup_free() 0x8ccad0
bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_unref() 0x8cf3c0: ref=2
bluetoothd[1516]: profiles/audio/avdtp.c:avdtp_sep_set_state() stream state changed: OPEN - > STREAMING
bluetoothd[1516]: profiles/audio/sink.c:sink_set_state() State changed /org/bluez/hci0/dev_10_9E_3A_92_2E_DA: SINK_STATE_CONNECTED - > SINK_STATE_PLAYING
bluetoothd[1516]: profiles/audio/transport.c:transport_update_playing() /org/bluez/hci0/dev_10_9E_3A_92_2E_DA/fd0 State=TRANSPORT_STATE_ACTIVE Playing=1
[ 1902.124926] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 20
[ 1903.164933] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 22
[ 1904.204932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 21
[ 1905.244932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 14
[ 1906.284931] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 26
[ 1907.324939] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 18
[ 1908.364936] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 18
[ 1909.404933] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 20
[ 1910.444937] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 13
[ 1911.484925] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 16
[ 1912.524927] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 14
[ 1913.564933] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 13
[ 1914.604934] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 10
[ 1915.644932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 7
[ 1916.684940] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 8
[ 1917.724923] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 9
[ 1918.764925] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 15
[ 1919.804933] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 21
[ 1920.844937] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 21
[ 1921.884941] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 27
[ 1922.924932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 20
[ 1923.964933] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 16
[ 1925.004927] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 19
[ 1926.044934] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 31
[ 1927.084937] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 22
[ 1928.124936] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 31
[ 1929.164931] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 32
[ 1930.204929] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 18
[ 1931.244931] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 36
[ 1932.284931] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 24
[ 1933.324936] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 21
[ 1934.364932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 20
[ 1935.404930] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 11
[ 1936.444934] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 15
[ 1937.484928] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 17
[ 1938.524946] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 20
[ 1939.564928] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 13
[ 1940.604935] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 19
[ 1941.644929] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 16
[ 1942.684932] rtk_btcoex: count_a2dp_packet_timeout: a2dp_packet_count 28

不出意外的話可以聽到播放的歌曲聲音了。