Android藍(lán)牙協(xié)議

1、Android藍(lán)牙協(xié)議棧Android藍(lán)牙協(xié)議棧使用的是BlueZ,支持GAP,SDP,andRFCOM覷范，是一個(gè)SIG認(rèn)證的藍(lán)牙協(xié)議棧。Bluez是GPL許可的，因此Android的框架內(nèi)與用戶空間的bluez代碼通過(guò)D-BUS程通訊進(jìn)行交互，以避免專有代碼。Headset和Handsfree(v1.5)規(guī)范就在Android框架中實(shí)現(xiàn)白它是跟PhoneApp緊密耦合的。這些規(guī)范也是SIG認(rèn)證的。下面的圖表提供了一個(gè)以庫(kù)為導(dǎo)向的藍(lán)牙棧視圖ApplicationsSetting。APPRhoneAppLibraries(userspace)BUSLinuxKernelHardware實(shí)線框的

2、是Android模塊，紅色虛線部分為合作伙伴指定模塊(譯者注：芯片商提供)下面的圖表是以進(jìn)程為導(dǎo)向視圖:AndroidBluetoothArchitectureJavacve*+UrapacD(Mwun9T5燈序htodwrAon10SDK.UluelpgPrQfrES*NndKnCmJkrtdrtldIPC一fflTRMW置歲tI4rsi?電rVon，HFGOM廿SCOLZCAPHC1中w片(Gpnelxlooch哂&w百亨一A|AFALUETOOIM)移植BlueZ是兼容藍(lán)牙2.1的，可以工作在任何2.1芯片以及向后兼容的舊的藍(lán)牙版本。有要有兩個(gè)方面: 串口驅(qū)動(dòng)UARTdriver 藍(lán)牙電

3、源開(kāi)/關(guān)BluetoothPowerOn/Off串口驅(qū)動(dòng)BlueZ核心子系統(tǒng)使用hciattach守護(hù)進(jìn)程添加你的指定硬件串口驅(qū)動(dòng)。例如，MSM7201A這個(gè)文件是在drivers/serial/msm_serial.c。你還需要通過(guò)修改init.rc為hciattach來(lái)編輯命令行選項(xiàng)。藍(lán)牙電源開(kāi)/關(guān)藍(lán)牙芯片的電源開(kāi)關(guān)方法1.0和Post1.0是不同的，具體如下： 1.0:Android框架寫(xiě)0或1至U/sys/modules/board_PLATFORM/parameters/bluetooth_power_on Post1.0:Android框架使用linuxrfkillAPI,參考ar

4、ch/arm/mach-msm/board-trout-rfkill.c例子。編譯編譯Android打開(kāi)藍(lán)牙支持，添加下面這行內(nèi)容到BoardConfig.mkBOARD_HAVE_BLUETOOTH:=true解決問(wèn)題調(diào)試調(diào)試你的藍(lán)牙實(shí)現(xiàn)，可以通過(guò)讀跟藍(lán)牙相關(guān)的logs(adblogcat)和查找ERRO和警告消息。Android使用Bluez,同時(shí)會(huì)帶來(lái)一些有用的調(diào)式工具。下面的片段為了提供一個(gè)建議的例子：hciconfig-a# printBTchipsetaddressandfeatures.UsefultocheckifyoucancommunicatewithyourBTchips

5、et.hcidump-XVt# printliveHCIUARTtraffic.hcitoolscan# scanforlocaldevices.UsefultocheckifRX/TXworks.l2pingADDRESS# pinganotherBTdevice.UsefultocheckifRX/TXworks.sdptoolrecordsADDRESSrequesttheSDPrecordsofanotherBTdevice.守護(hù)進(jìn)程日志hcid(STDOUTW口hciattach(STDERR)的守護(hù)進(jìn)程日志缺省是被寫(xiě)到/dev/null。編輯init.rc和init.PLATFOR

6、M.rc在logwrapper下運(yùn)行這些守護(hù)進(jìn)程，把它們輸出到logcat。hciconfig-a和hcitool如果你編譯你自己的system.img,除了hcitool掃描不行，hciconfig-a是可以工作的，嘗試安裝固件到藍(lán)牙芯片XXXTBD工具BlueZ為調(diào)試和與藍(lán)牙子系統(tǒng)通信提供很多設(shè)置命令行工具，包含下面這些：hciconfighcitoolhcidumpsdptooldbus-senddbus-monitor特性支持這一部分提供在每個(gè)android版本中的藍(lán)牙的一些變化，主要是一些性能參數(shù)上的東西，就不翻譯了。Android1.0releasePlatformfeatures

7、 BasedonBluez3.36andLinuxKernel2.6.25 Bluetooth2.0+EDRhoststack HeadsetProfile1.0inAudioGatewayrole HandsfreeProfile1.5inAudioGatewayroleoThree-waycallingoPhonebookoverATcommandsQualifications QDIDB014524:Hoststack(SDP,L2CAP,GAP,RFCOMM,SPP) QDIDB014624:EPLforHTCDream(HSP,HFP)ExampleproductsHTCDream/

8、T-MobileG1Android1.1releaseNoBluetoothchangessince1.0Android1.5release(cupcake)PlatformfeaturesbBasedonBluez3.36withLinuxKernel2.6.27bBluetooth2.0+EDRhoststackoSupportforauto-pairingwith0000devices HeadsetProfile1.1inAudioGatewayrole HandsfreeProfile1.5inAudioGatewayroleoThree-waycallingoPhonebookov

9、erATcommandsoVolumesynchronizationoeSCOoExtensivebugfixesandcompatibilityimprovements StereoBluetooth(A2DP1.2)inSourceroleoAVDTP1.2inAcceptorandInitiatorrolesoGAVDTP1.0inAcceptorandInitiatorroleso44.1khz,stereo,softwareSBCcodec RemoteControl(AVRCP1.0)inTargetroleoAVCTP1.3inTargetroleoplay/pause/stop

10、/prev/nextQualifications QDIDB015261:Hoststack(SDP,L2CAP,GAP,RFCOMM,SPP,AVCTP,AVRCP,GAVDP,AVDTP,A2DP) QDIDB015262:EPLforHTCSapphire(HSP,HFP)Android2.0/2.1release(eclair)Platformfeatures BasedonBluez4.47withLinuxKernel2.6.29 Bluetooth2.1+EDRhoststackoSupportforauto-pairingwith0000devicesoSupportforSi

11、mpleSecurePairing HeadsetProfile1.1inAudioGatewayrole HandsfreeProfile1.5inAudioGatewayroleoThree-waycalling0PhonebookoverATcommands0VolumesynchronizationoeSCOoExtensivebugfixesandcompatibilityimprovements StereoBluetooth(A2DP1.2)inSourceroleoAVDTP1.2inAcceptorandInitiatorrolesoGAVDTP1.0inAcceptoran

12、dInitiatorroleso44.1khz,stereo,softwareSBCcodec RemoteControl(AVRCP1.0)inTargetroleoAVCTP1.3inTargetroleoplay/pause/stop/prev/next ObjectPushProfileversion1.1oAddsabilitytotransferpictures,videosoTransferofcontactsusingvCardisnotsupportedinthisrelease. PhoneBookAddressProfileversion1.0oPhoneBookServ

13、erEquipment(PSE)rolesupported UsingJavaBluetoothAPIs,anAndroidapplicationcanpeformthefollowing:oScanforotherBluetoothdevicesoQuerythelocalBluetoothadapterforpairedBluetoothdevicesoEstablishRFCOMMchannelsoConnecttootherdevicesthroughservicediscoveryoTransferdatatoandfromotherdevicesoManagemultiplecon

14、nectionsSSupportforBluetoothenabledcaranddeskdocksoFrameworksupportforroutingPhoneCallAudioandA2DPstreamingusingcaranddeskdocks.Android2.2release(Froyo)Platformfeatures BasedonBluez4.47withLinuxKernel2.6.32 Nonewprofilesadded. AddedabilitytosharecontactsusingvCard Addedabilitytoexportallcontacts-usefultotransfercontactstocarkits Improvedcompatibilitywithheadsetsandcarkits.FuturereleasesThissectionoffersaroughguideofwhichfeaturestheteamisdevelopingforthenextrelease.Thisfeaturelistmaychangewithoutnoti