USB组合设备实现的结合鼠标和游戏手柄设备

hisTechnicalBriefdescribesaUSBcombination

deviceconsistingofamouseandagamepadimple-mentedonaPIC16C765.Previoustechnicalbriefs

describethetranslationofaPS/2

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mousetoaUSB

mouse(TB055)andthetranslationofagameport

gamepadtoaUSBgamepad(TB054).Thesetwo

deviceswerecombinedtoformtheUSBcombination

devicedescribedinthisbrief.Detailsaboutthetransla-tionandimplementationofthemouseandthegame-padarenotcovered.Refertotheearlierbriefsforthis

informationaswellastheircircuitdiagrams.Thisbrief

focusesonsettingupthedescriptorsappropriatelyfor

acombinationdevice.TB057USBCombinationDevicesDemonstratedbyaCombinationMouseandGamepadDeviceDESCRIPTORSAuthor:RestonConditAcombinationdevice,fromtheUSBstandpoint,isaCompany:MicrochipTechnologyInc.devicewithmultipleinterfaces.Aninterfaceisanend-pointoragroupofendpointsthatperform(s)acertainfunction.Sinceonlytwoendpointsa