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  • Android L Bluedroid基本资讯

    Android Bluetooth How To(Based on Android L Bluedroid)

    持续更新中…

    1、How to enable btsnoop log?

      a) UI Settings-->

      b)  Developer Options-->

      c)  reboot Tablet, then snoop log will locate in /sdcard/btsnoop_hci.log(this path can be configured in /etc/bluetooth/bt_stack.conf)

    2、If developer options default not enabled, you can use following steps to enable it

      a) Settings-->

      b) About Tablet-->

      c) Click 4 or 5 times or more in Build Number-->

      d)then, Develop options will comeout-->

    Pls also be noted that how to enable Developer Options might depend on system and Android Versions

    3、bluedroid useful config files

      a) bt_stack.conf

        i.  此文件保存在/etc/bluetooth/目录下,用于配置抓取bluedroid协议栈log的方式和log的级别

      b) bt_config.xml

              i.此文件在/data/misc/bluedroid/目录下,保存了当前BT设备、扫描到的BT设备以及配对过的BT设备的信息,包括device name、BD_ADDR、link key、Report Descriptor(HID)等等

      c)  bt_did.conf,/etc/Bluetooth/

               i. Device ID (DID) configuration file,未被使用

      d) auto_pair_devlist.conf,/etc/Bluetooth/

               i. 保存blacklist和whitelist

    4、How to enable & adjust bluedroid debug log level?

      a) this should customized in /etc/bluetooth/bt_stack.conf

      b) enable btsnoop log -->

                             i.set BtSnoopLogOutput to true

              BtSnoopLogOutput=true

                           ii.  set BtSnoopFileName to path you want to save btsnoop log

              BtSnoopFileName=/sdcard/btsnoop_hci.log

      c) adjust trace & debug level

                             i.  set TraceConf to true

            TraceConf=true

                           ii. 根据需要设置debug level,默认是2,通常debug的时候,都是将level默认设置为5来抓log,这样可以打出更多的信息(logcat)

            TRC_BTM=5

            TRC_HCI=5

            TRC_L2CAP=5

            TRC_RFCOMM=5

            TRC_OBEX=5

            TRC_AVCT=5

            TRC_AVDT=5

            TRC_AVRC=5

            TRC_AVDT_SCB=5

            TRC_AVDT_CCB=5

            TRC_A2D=5

            TRC_SDP=5

            TRC_GATT=5

            TRC_SMP=5

            TRC_BTAPP=5

            TRC_BTIF=5

    5、Android Bluetooth相关code路径

      a) bluedroid协议栈

                             i.   <Android Root>/external/bluetooth/bluedroid/

      b) Bluetooth.apk

                             i.  <Android Root>/packages/apps/Bluetooth/

      c) Settings.apk

                             i. <Android Root>/packages/apps/Settings/src/com/android/settings/bluetooth 

      d) hal头文件

                             i. <Android Root>/hardware/libhardware/include/hardware/bluetooth.h

             ii. <Android Root>/hardware/libhardware/include/hardware/bt_*.h

      e) framework相关

                             i.  <Android Root>/frameworks/base/core/java/android/bluetooth

                           ii.   <Android Root>/frameworks/base/services/core/java/com/android/server/ BluetoothManagerService.java

    6、bluedroid build出来的binary

      a) bluetooth.default.so

                             i. 这个协议栈的profile、stack所编译出来的,是bluedroid的精华所在

                             i.  由如下库文件组成,static lib (参考:bluedroid/main/Android.mk)

        1. libbt-brcm_bta -> bluedroid/bta/Android.mk
        2. libbt-brcm_gki -> bluedroid/gki/Android.mk
        3. libbt-brcm_stack -> bluedroid/stack/Android.mk
        4. libbt-hci -> bluedroid/hci/Android.mk
        5. libbt-utils -> bluedroid/hci/Android.mk
        6. libbt-qcom_sbc_decoder -> bluedroidembdrvsbcdecoderAndroid.mk
        7. libosi -> bluedroid/osi/Android.mk
        8. libtinyxml2  

      b) audio.a2dp.default.so

                             i. 这个是a2dp和audio的hal接口,-> bluedroidaudio_a2dp_hwAndroid.mk

      c) libbt-vendor.so

                             i.  vendor自己实现的,用于将bluedroid协议栈铜特定的芯片driver接起来

    7、  Android BT基本架构

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  • 原文地址:https://www.cnblogs.com/helloahui/p/4439522.html
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