Cubietruck---23.android蓝牙分析1总

1. android4.2.2中蓝牙的目录层次结构
a. 设置中的bluetooth

./packages/apps/Settings/src/com/android/settings/bluetooth/
实际上ct把packages中的Settings覆盖了，新目录在：
./device/softwinner/common/packages/TvdSettings/src/com/android/settings/bluetooth/

b. java中间层

./frameworks/base/core/java/android/bluetooth/
./frameworks/base/services/java/com/android/server/

c. packat中的java层

./packages/apps/Bluetooth/src/com/android/bluetooth/

d.packet 中的jni层

./packages/apps/Bluetooth/jni/

e.bluedroid协议栈

./external/bluetooth/bluedroid/

f. hw层，厂商自己的库libbt-vendor.so

./device/common/libbt/

g.内核层，蓝牙驱动的位置

./lichee/linux-3.4/drivers/net/wireless/bcmdhd/

2.蓝牙协议栈bluedroid目录结构分析

cong@msi:/work/ct/android/external/bluetooth/bluedroid$ tree -L 2 -d
├── audio_a2dp_hw // 音频相关
├── bta            //Bluetooth Application Layer, 用于和android framework层交互
│   ├── ag            //audio gateway
│   ├── ar            //audio/video registration
│   ├── av            //advanced audio/video
│   ├── dm            //device manager
│   ├── fs            //file system
│   ├── gatt
│   ├── hh            //HID HOST
│   ├── hl            //HeaLth(HL) device profile
│   ├── include
│   ├── jv            //BTA Java(JV) I/F
│   ├── pan
│   ├── pb            //phone book access server (PBS)
│   └── sys            //system manager
├── btif
│   ├── co
│   ├── include
│   └── src
├── conf
├── embdrv
│   └── sbc
├── gki                //Generic Kernel Interface
│   ├── common
│   └── ulinux
├── hci
│   ├── include
│   └── src
├── include
├── main
├── stack        //stack 实现了各种协议
│   ├── a2dp        //Advanced Audio Distribution Profile (A2DP)
│   ├── avct        //audio/video control transport protocol.
│   ├── avdt        //audio/video distribution transport protocol
│   ├── avrc        //AVRCP
│   ├── bnep
│   ├── btm            //Bluetooth Manager (BTM)
│   ├── btu            //Bluetooth Upper Layer
│   ├── gatt
│   ├── hcic
│   ├── hid            // HID
│   ├── include
│   ├── l2cap
│   ├── mcap
│   ├── pan
│   ├── rfcomm
│   ├── sdp
│   └── smp
├── test
│   └── bluedroidtest
├── tools
├── udrv
│   ├── include
│   └── ulinux
└── utils
    ├── include
    └── src

3.术语
ACL: Asynchronous Connectionless, 无连接的界步连接，用于分组数据传输
A2dp: Advanced Audio Distribution Profile 蓝牙音频传输模型协定
ATT: Attribute Protocol
AVRCP: Audio/Video Remote Control Profile
A2MP: AMP Manager Protocol
BLE: Bluetooth Low Energy, 低耗电蓝牙
BTE: Bluetooth Embedded System，它实现了BT的核心功能。
BTE则通过HCI与厂商蓝牙芯片交互以实现了蓝牙协议栈的通用功能和相关协议
BTA: Bluetooth Application Layer, 用于和android framework层交互
BTA实现了蓝牙设备管理、状态管理及一些应用规范
btm:Bluetooth manager在协议栈中
btu:Bluetooth Upper Laye在协议栈中
BNEP: Bluetooth Network Encapsulation Protocol
cob: chip on board
dm:    Device Management
EDR：Enhanced Data Rate
EIR: Extended inquiry response
HCI: Host Control Interface  
HDP：Bluetooth Health Device Profile 蓝牙关于医疗方面的应用
HFP : Hands-free Profile  和电话相关，蓝牙接听、挂断电话
LMP: Link ManagerProtocol, 链路管理协议
L2CAP: Logical Link Control and Adaptation Protocol， 逻辑链路控制和适配协议
GATT: Generic Attribute Profile   通用属性配置文件
GAP: Generic Access Profile
PBAP: Phonebook Access Profile 电话号码簿访问协议
RFCOMM: 串口仿真协议
SCO: Synchronous Connection Oriented, 面向连接的同步连接，用于语音传输
SDP: ServiceDiscovery Protocol，服务发现协议
TCS: TelephonyControlprotocol Spectocol，二进制电话控制协议

3.1蓝牙工作模式： 
激活(active) 呼吸（sniff) 保持(hold) 休眠(park)