Design and Implementation of an Embedded Python Run-Time System嵌入式Python运行时系统的设计与实现

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1、DesignandImplementationofanEmbeddedPythonRun-TimeSystemThomasW.BarrRebeccaSmithScottRixnerRiceUniversityftwb,rjs,rixnerg@rice.eduAbstractAsthecapabilitiesofembeddedsystemsincrease,thissituationisbecominguntenable.ProgrammingmustbeThispaperpresentsthedesignandimplementationofsi

2、mplifiedtomeetthedemandforincreasinglycomplexacompleteembeddedPythonrun-timesystemforthemicrocontrollerapplications.ARMCortex-M3microcontroller.TheOwlembeddedThispaperpresentsonemechanismfordoingso:Pythonrun-timesystemintroducesseveralkeyinnova-anefficientembeddedPythonrun-times

3、ystemnamedtions,includingatoolchainthatiscapableofproducingOwl.TheOwlsystemisacompletePythondevelopmentrelocatablememoryimagesthatcanbeutilizeddirectlytoolchainandrun-timesystemformicrocontrollersthatbytherun-timesystemandanovelforeignfunctionin-donothaveenoughresourcestorunar

4、ealoperatingsys-terfacethatenablestheefficientintegrationofnativeCtem,butarestillcapableofrunningsophisticatedsoft-codewithPython.waresystems.ThesemicrocontrollerstypicallyoperateTheOwlsystemdemonstratesthatitispracticaltorunat50–100MHz,have64–128KBofSRAM,andhavehigh-levellangu

5、agesonembeddedmicrocontrollers.In-upto512KBofon-chipflash.Oneexampleofsuchstrumentationwithinthesystemhasledtoanoverallsys-amicrocontrolleristheARMCortex-M3.ARMpre-temdesignthatenablesPythoncodetobeexecutedwithdictsthatin2015,themarketfortheseCortex-Mclasslowmemoryandspeedoverh

6、eads.Furthermore,thispa-microcontrollerswillbearound18billionunits[7].InperpresentsanevaluationofanautonomousRCcarthatcontrast,Gartner,Inc.predictsthat404millionx86pro-usesacontrollerwrittenentirelyinPython.Thisdemon-cessorswillshipin2012[9].stratestheeasewithwhichcomplexembed

7、dedsoftwareOwlisacompletesystemdesignedforARMCortex-systemscanbebuiltusingtheOwlinfrastructure.Mmicrocontrollersthatincludesaninteractivedevelop-mentenvironment,asetofprofilers,andaninterpreter.It1Introductionisderivedfromportionsofseveralopen-sourceprojects,includingCPythonand

8、Baobab.Mostnotably,thecoreForeverymicroprocessorinatraditiona