chapter One of The Emedded System in Intelligent Health WatchWord格式文档下载.docx
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PartOne1
1.1Background:
1
1.2EmbeddedDevelopmentTechnologyandEmbeddedDevelopmentProcess2
1.2.1EmbeddedDevelopmentTechnology2
1.2.2EmbeddedDevelopmentProcess3
1.3EmbeddedSoftwareStratificationandTransplantation4
1.3.1EmbeddedSoftwareStratification4
1.3.2EmbeddedSoftwareTransplantation4
1.4Summary5
PartTwo6
PartThree6
Outline
PartOne
ThebackgroundofthedevelopmentoftheEmbeddedSysteminintelligenthealthwatch
Withtherapiddevelopmentofsocietyandthefurtherimprovementoflivingstandards,peoplearenotonlysatisfiedwiththesubsistenceandentertainmentoflife,butalsopaymoreattentiontotheirownhealth.Therefore,ahealthylifestyleisalsomuchfavoredbypeople.Whatkindoflifestyleisahealthylifestyleisalsoaproblemthatthecommunityhasbeendiscussingandpayingattentionto.Atthesametime,withtheintroductionoftheconceptofwearableintelligentdevices,itprovidesanewwayforpeopletopursuehealthylifestyles.Asawearableintelligentdevice,intelligentwatches,coupledwithfunctionssuchashealthmanagement,newsnotification,weatherandstock,havefurtherenrichedtheconceptofwearableintelligentdevices.Therefore,inthispaperwearegoingtocompletethedesignandimplementationofintelligenthealthywatcheswhichareusedtomonitorthedataofuser’smovementandsleep.Thentheusercanenjoyahealthyandhappylifeinthisway.
1.2EmbeddedDevelopmentTechnologyandEmbeddedDevelopmentProcess
1.2.1EmbeddedDevelopmentTechnology
AccordingtothedefinitiongivenbyBaiduBaike,inanarrowsense,thewearablesmartdeviceisageneraltermforwearabledevicesdevelopedbyusingwearabletechnologytodesigneverydaywearabledevices.SuchasGoogleGlass,GalaxyGear,SonyIntelligentWatchandsmartbraceletsintroducedbydomesticmanufacturerslikeHuawei,360andothercompanies;
Ingeneralwearableintelligentdeviceslikesmartwatchesorsmartglassesmaynotrelyonsmartphonestoachievefullorpartialfeatures.Itcanalsofocusononlyonetypeofapplicationandneedtobeusedinconjunctionwithotherdeviceslikesmartphones.Forexample,therearevarioustypesofwristbandsandsmartjewelryusedforsignsmonitoring.
Withthechangingneedsofusersandthecontinuousimprovementoftechnology,theexistingformsandapplicationfunctionsofwearablesmartdevicesareconstantlychanging.Eachdefinitionofwearablesmartdevicesisalsodifferent.Amongthem,Wikipediadefineswearablesmartdevicesas"
miniatureelectronicdevicesthatcanbewornonbodyforactivities"
.Thisdefinitionissimple.Butitalsoincludesafewofthefeatureswhichwearablesmartdeviceshave.Featuresareasfollows:
a)Persistent
b)Intelligent
c)Specialsensor
1.2.2EmbeddedDevelopmentProcess
Itisalengthyandcomplicatedprocessfromtheconceptofanembeddeddevicetoitsimplementationwhichrequiresthecoordinationofmanypeopletocomplete.Inthisprocessweneedtousealargenumberoftechniquesandmanagementmethods,butfortechnologyalwayskeepsimprovingandtheknowledgeusedintheprocessisconstantlyupdated,soembeddeddeveloperscan’tgetacompleteandproficientmasterofmanytechnicaldetailsachievingtheproductprocess.Atthesametime,thetechniciansjustneedtohaveenoughknowledgeinvolvedintheimplementationprocessanddonotneedtomasterallthetechnologiesusedinproductdevelopment.However,theembeddedproductdevelopmentprocessisnotwithoutrules.Manypredecessorsfinallysummedupacompletesetofembeddedproductdevelopmentprocess,Andundertheguidanceofit,eachtechnicalstaffperformshisduties,worktogethertoimprovetheefficiency.
Allembeddedproductswillincludetwoparts,namely,embeddedsoftwareandembeddedhardware.Theembeddedsystemdevelopmentprocessisdividedintothreeparts,namelytheoveralldesignanddevelopmentofembeddedsystems、thesoftwaredesignanddevelopmentandhardwaredesignanddevelopment..
Intheoveralldesignanddevelopmentofembeddedsystems,itmainlyinvolvesthedeterminationoftheoverallsystemframeworkandtheselectionofhardware,etc.Sincetherequirementsdeterminethetypeofhardwareinthesystem,soweneedtochoosethespecifichardwareaccordingtospecificrequirements.Wealsoneedtodotheseprocesseslikearchitecturedesign,detaileddesignandimplementationinthehardwareandsoftwarearchitecturedesignandimplementationprocess.Theyaresimilartothetraditionalsoftwaredevelopmentmethods.
1.3EmbeddedSoftwareStratificationandTransplantation
1.3.1EmbeddedSoftwareStratification
Thehardwarearchitectureisthefoundationwhilethesoftwarearchitectureisthesouloftheembeddedsystem.Anembeddedsystemcanbedividedintofourlevels:
BootLoader,Linuxkernel,filesystemanduserapplicationfromtheperspectiveofsoftware.Eachlevelisresponsiblefordifferentfunctionsbutindispensable.Thefourlevelscompletethefunctionofembeddedproductscooperatingwitheachother.
BootLoaderisthemostbasicpartoftheembeddedsystemwhichisthefirstprogramtorunwhenthesystemispoweredon.BootLoadercanbesplitedintoBootandLoader.Theformeristostarttheembeddedsystem,infact,istoinitializetheoperation.AndtheotheroneistocopytheoperatingsystemsolidifiedintheROMorapplicationcodeandsystemparameterstoRAM.
LinuxkernelisthecoreoftheentireLinuxoperatingsystem,whichdeterminestheperformanceandstabilityoftheentiresystem.
Thefilesystemisanimportantpartoftheembeddedsoftwaresystem.ThefilesystemislocatedontheLinuxkernel.Itprovidestheuserwithaunifiedandobject-orientedaccessinterfaceandavoidthephysicaldirectoperationofequipmentandresourcemanagement.
Thetopoftheembeddedsoftwaresystemistheapplicationlayerwhichisthefunctionembodyingoftheentireembeddedproduct.Itcarriestheresponsibilityofdirectlyinteractingwiththeuserandprovidingtheuserwiththefinalserviceoftheproduct.
1.3.2EmbeddedSoftwareTransplantation
TheIntelligentHealthWatchusestheJZ4775program.Theprogramhasbeenincludedinthefactory:
bootloaderXBOOT,mobileoperatingsystemLinux3.4,Android4.1.2rootfilesystemandsomeandroidapplications.However,duetospecialfeaturesandinterfacerequirementsofthecustomintelligenthealthwatch,weneedtore-modifyanddesignthesoftwaresystem.Thespecificchangesareasfollows:
(1)changeBootloaderX-boot’slogo
a)preparetheoriginaljpgpicture
b)generate.rlefile
c)compilethecustomlogointoX-boot.
(2)IntheLinuxkernellayer,becausethewatchneedstocommunicatewiththesmartphonebyBluetooth.Atthesametimeinthefunctionalneedsoftheupperapplication,weneedfunctionslikestep-by-stepandstand-upmonitoring,andthesefunctionsneedtousetheaccelerationsensor.SointhekernellayerweneedtokeepaccelerometerserviceandBluetoothservice,andotherunwantedservicesdonotneedtobestarted.
(3)Inthefilesystemlayer,theIntelligentHealthWatchusestheTMPFS,devpts,proc,andsysfsfilesystemssincetheAndroidoperatingsystemisalreadyinstalledintheJZ4775solution.
(4)Intheapplicationlayerweneedtodomorework.Firstofallweneedtowritecustomhealthmonitoringmanagementsoftwareaccordingtotheneeds,designsoftwarearchitecture,writesoftwarecodeandtestittoensuretherearenoerrors.Atthesametime,inordertomaketheIntelligentHealthWatchmoreefficient,weneedthedeletionofsomeapplications.ThespecificdesignistodeletethecallingfunctionAPP,SMSAPP,contactAPP,cameraAPP,photogalleryAPP,notepadAPP,musicAPP,browserAPP,calculatorAPP,calendarAPPandclockAPPwhichareincludedinAndroid.
AftercompletingtheoperationsofmodifyingtheLinuxkernelandstreamliningAndroid,thesystemneedstobecompiled.Sincethen,wehaveacompletedesignforsoftwarelayeroftheintelligenthealthwatchembeddedsystem.Inthenextchapterwewillgiveacompleteanalysisanddesignofthesystem'
sfunctionalarchitecture.
1.4Summary
ThischaptermainlyintroducesthebackgroundofthedevelopmentoftheEmbeddedSysteminintelligenthealthwatch.AndinformationaboutEmbeddeddevelopmenttechnologyandEmbeddeddevelopmentprocessisgiven.ThischaptermainlyintroducesEmbeddedSoftwareStratificationandTransplantationintheintelligenthealthwatch.Accordingtothetraditionalembeddedproductdevelopmentprocess,wedeterminethefunctionsthesmarthealthwatchneedtohave.Thenwedesignthesoftwarearchitectureofthesmarthealthwatchindetail.Accordingtothetraditionalhierarchicalprincipleofembeddedsoftware,theembeddedsoftwarepartoftheintelligenthealthwatchisdividedintofourlayers.Inordertoensurethesmoothnessofthewatchandcustomfeaturesandinterfaces,thischapterintroducescustommodificationanddevelopmentforalllayers.
EmbeddedDevelopmentTechnologyandEmbeddedDevelopmentProess
EmbeddedSoftwareStratificationandTransplantation:
levelofembeddedsoftwareandtheachievementofembeddedsoftwaretransplantation
Summary
PartTwo
Applicationoverview
ApplicationFunctionAndNon-FunctionRequirements
Movementmonitoringfunction
Maintenanceandmanagementofhealthinformation
Sleepmonitoringfunction
Messageprompt
Unstoppedin24hoursperday
FunctionArchitectureDesignofApplication
There
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