基于LabVIEW的PDA软件设计

I基于LabVIEW的PDA软件设计摘要LabVIEW是一个开放式的虚拟仪器开发系统应用软件，是一个使用图形符号来编写程序的编程环境，在该环境中用户可以利用现有的计算机配上相应的硬件，形成既有普通仪器的基本功能，又有一般仪器所没有的特殊功能的高档低价的虚拟仪器。其程序设计实质就是设计一个个的“虚拟仪器”，即“VIs”。在计算机显示屏幕上利用功能库和开发工具库产生一个前面板；在后台则利用图形化编程语言编制用于控制前面板的程序。程序的前面板具有与传统仪器类似的界面，可接受用户的鼠标指令。每一个VI都可以作其它VI的调用对象，其功能类似于文本语言的子程序。用LabVIEW设计的虚拟仪器可以脱离LabVIEW开发环境，最终用户看见的是和实际的硬件仪器相似的操作面板。与C和BASIC一样，LabVIEW也是通用的编程系统，有一个完成任何编程任务的庞大函数库。LabVIEW的函数库包括数据采集、GPIB、串口控制、数据分析、数据显示及数据存储，等等。LabVIEW也有传统的程序调试工具，如设置断点、以动画方式显示数据及其子程序（子VI）的结果、单步执行等等，便于程序的调试。PDA是最近几年随着嵌入式系统发展起来的掌上电脑系统，它和计算机有着相似的结构：拥有处理器、存储器、显示屏、各种I/O接口等，同时它还有轻便、小巧便于携带的优点。将虚拟仪器技术应用到PDA上，是虚拟仪器技术发展的一个新方向。文中探讨和基于PDA的虚拟仪器技术相关的数据采集，信号处理与分析等，并介绍了一套开发系统以及应用。将虚拟仪器技术应用于PDA(个人数字助理)中，可以利用PDA的优点，不受时间和空间的限制完成各种测试测量任务。本文主要介绍利用虚拟仪器仿真PDA以及利用PDA模块将LabVIEW程序下载至PDA中，并在PDA中运行。关键词：LabVIEW，PDA模块，智能手机，PDA的操作系统IIThePDASoftwareDesignBasedonLabVIEWABSTRACTLabVIEWisthevirtualinstrumentdevelopmentofanopentypesystemapplicationthesoftwareisanusagesketchsigntowritetheplaitdistanceofprocedureenvironment,canmakeuseofintheenvironment'sconvenientdoortheexistingcalculatorgoestogetherwithhomologoushardwareandformsthebasicfunctionofcurrentcommoninstrument,andthenhavethevirtualinstrumentoftheupscalelowpriceofspecialfunctionthatthegeneralinstrumenthasno.ItsprogramdesignissubstantialtoisvirtualinstrumentthatdesignsanamelyVIs.Showascreeninthecalculatorupmakeuseoffunctiondatabaseanddevelopmenttooldatabasetoproduceafrontpanel;Thenmakeuseofsketchtoturnaplaitdistanceinthebackstage,thelanguagedrawsuptousedfortheprocedurethatcontrolsfrontpanel.Thefrontpanelofprocedurehastheinterfacetoissimilartowithtraditionalinstrument,canacceptthecustomer'smouseinstruction.EachVIcanmakeadjustingofotherVIsestouseobject,itsfunctionismoresimilarthanthetextoriginallyphoneticsub-procedure.ThevirtualinstrumentdesignedwithLabVIEWcanescapefromLabVIEWdevelopmentenvironment,whatenduserseesisasimilartotheactualhardwareinstrumentoperationfront-panel.CandBASICLabVIEW,alsogeneralprogrammingsystem,thereisahugetasktocompleteanyprogrammingfunction.LabVIEWfunctionlibraryincludedataacquisitionandcontrol,data,serialGPIBanalysis,datadisplayanddatastorage,etc.TheprogramalsohavetraditionalLabVIEWdebuggingtools,suchassetbreakpoints,animationwaydisplaydataandsubroutine(thesubvi)resultsandsingle-stepetc,facilitateprogramdebugging.PDAwithembeddedsystemsinrecentyearsdevelopedahandheldcomputersystem,whichhasasimilarstructureandthecomputer:aprocessor,memory,display,variousI/Ointerface,whileitalsolightweight,compactandeasytobringadvantages.ApplicationofvirtualinstrumentationtothePDA,thedevelopmentofvirtualinstrumentationisanewdirection.DiscussionpaperPDA-basedvirtualinstrumenttechnology-relateddataacquisition,signalprocessingandanalysis,andintroducedasetofdevelopmentsystemsandapplications.ThevirtualinstrumenttechnologyinPDA(PersonalDigitalAssistant),youcanusetheadvantagesofPDA,withouttimeandspacetocompleteavarietyoftestandmeasurementtasks.ThispaperdescribessimulationofvirtualinstrumentandtheuseofPDALabVIEWPDAmodulewilldownloadtothePDA,andinthePDAtorun.IIIKEYWORDS：LabVIEW,PDAmodule，Smartphones，PDAOperatingSystemsIV目录摘要...........................................................................................................................................IABSTRACT..............................................................................................................................II目录........................................................................................................................................IV1绪论........................................................................................................................................11.1课题的提出.................................................................................................................11.1.1课题的背景................................................................................................11.1.2发展状况....................................................................................................11.1.3PDA的发展趋势.......................................................................................21.2课题的研究内容和技术关键.....................................................................................21.2.1研究内容......................................................................................................21.2.2课题的关键技术..........................................................................................31.3系统的总体设计方案.................................................................................................31.4预期成果.....................................................................................................................32虚拟仪器及LABVIEW概述...............................................................................................42.1虚拟仪器概述.............................................................................................................42.1.1虚拟仪器介绍..............................................................................................42.1.2虚拟仪器的内部功能划分..............................