飞凌OK113i-C全志T113-i开发板rtl8723du WIFI功能测试及蓝牙驱动移植

冬至子 2023-12-11 1016

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描述

飞凌 OK113i-C 全志T113-i开发板板载一个RTL8723du wifi/蓝牙二合一模块，板子出厂已经移植好了WIFI驱动但是蓝牙驱动没有，所以这篇文章我们主要做蓝牙驱动的移植和功能验证。

./build.sh menuconfig

在Device Drivers > Network device support > Wireless LAN下找到Realtek 8723D USB WiFi选项。

默认是开启的。

默认WIFI驱动联网尝试

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

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

打印网卡信息：

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连接路由器成功，可以ping 百度验证是否联网成功。

蓝牙功能

首先打印设备上的蓝牙设备

hciconfig -a

输出为空，应该是没有蓝牙驱动。看来出厂并没有带蓝牙驱动，下一步自行移植蓝牙驱动，板上的无线芯片模组使用的是rtl8723du是一款bt4.2和 wifi 2.4G芯片。

蓝牙驱动移植

  1. 修改kernel config
    修改OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig文件添加如下一行
CONFIG_BT_HCIBTUSB_RTLBTUSB=m
  1. 修改Kconfig
    添加如下：
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).
  1. 修改Makefile
    在文档最后添加：
obj-$(CONFIG_BT_HCIBTUSB_RTLBTUSB)    := rtk_btusb.o
rtk_btusb-objs                        := rtk_bt.o rtk_misc.o rtk_coex.o
  1. 将驱动文件中如下文件复制到内核目录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
  2. 编译内核驱动
    ./build.sh kernel

编译完成后会在OK113i-linux-sdk/out/t113_i/ok113i/longan/dist目录下生成rtk_btusb.ko驱动文件，将该驱动文件和驱动文件对应的固件文件（rtl8723du_fw.bin和rtl8723du_config.bin）放在板子/lib/firmware/下

为了方便查看驱动加载过程报错信息，打开内核打印信息：

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

将编译好的驱动文件和固件文件上传到板卡上，并将估计文件存放在板卡/lib/firmware目录下。

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蓝牙_Linux驱动/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

加载驱动试试，报错：

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：

MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);

重新编译驱动，然后上传并加载试试。

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

以上信息说明蓝牙驱动加载成功。
此时，再一次查看系统的蓝牙设备信息会打印如下：

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

蓝牙工具软件使用

蓝牙驱动安装成功后就可以对蓝牙设备进行配对连接并进行播放音频操作了，此处我们选择通过蓝牙连接家里的智能音箱天猫精灵作为蓝牙音频输出设备，涉及的蓝牙工具软件开发板上出厂移植好了，所以此处省去了移植这些工具软件的步骤。

  1. 启动系统蓝牙服务bluetoothd，使其在后台运行
    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. 通过bluetoothctl对蓝牙设备操作，主要包括：蓝牙设备信息打印查看，蓝牙设备开启和关闭、蓝牙外设扫描、查看扫描到的蓝牙外设设备、配对连接等，下面实例命令行中##开头的行是注释

    进入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

    蓝牙设备信息打印查看

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

    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

    蓝牙设备开启和关闭

    [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

    蓝牙设备开启和关闭

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

    查看扫描到的蓝牙外设设备

    [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)

    配对连接

    [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

报错了，因为没有提前运行bluealsa这个程序，运行如下：

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，再进入bluetoothctl 连接天猫精灵试试，首先输入devices命令打印出扫描到的设备信息，然后使用connect xx:xx:xx:xx:xx:xx连接上想要连接的蓝牙设备，连接成功后提示符会变成[连接的设备]样式，具体如下：

[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
  1. 蓝牙音频播放
    因为此处我们使用alsa-utils工具集中的 aplay 进行音频播放测试，所以仅仅支持PCM和WAV等音频格式，要是想直接播放 mp3 或者 mp4 等格式音频文件需要借助MPD或者FFmpeg等软件。
    上一步我们在bluetoothctl中打印扫描并连接了蓝牙音箱，蓝牙音箱的设备地址如下：
[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)

根据上面信息我们可以看到天猫精灵方糖的蓝牙设备地址是10:9E:3A:92:2E:DA ，所以我们可以使用如下命令进行音频播放测试：

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

不出意外的话可以听到播放的歌曲声音了。

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