Software Assurance of Programmable Logic Devices Presentation

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1、SoftwareAssuranceofProgrammableLogicDevicesKalynndaBerens,SAIC/GRCKalynnda.Berens@grc.nasa.gov1WhatisProgrammableLogicProgrammableLogicControllers(PLC)ProgrammableLogicDevicesFieldProgrammableGateArray(FPGA)ApplicationSpecificIntegratedCircuit(ASIC)System-on-

2、chip(SOC)ComplexPLD(CPLD)others2ConcernsPLCsare“programmed”,usuallybyengineers.Programminglanguagesmaybegraphical.PLdevicecomplexityissimilartosoftware,withmanyofthesameproblemsPLdevicesareultimately“hardware”,butprogrammedlikesoftware.ArePLfirmware?Currentas

3、suranceactivitiesmaynotbeadequateforthecomplexityofthesedevices.3SurveysUsageandAssurancesurveyssenttoengineers,assurancepersonnel,andothersatNASACentersDistributingsurveyswasmoredifficultthananticipatedTargetedemailrequestsproducedadequateresponses4UsageSurv

4、eyIdentificationProgrammableLogic(PL)InformationTypesofPLUsedandwhatforRespondentPLfamiliarityPLresponsibilityAssuranceStandardsProceduresConfigurationManagementTestingAssuranceorganizationsSafety5AssuranceSurveyIdentificationProjectProgrammableLogicAssurance

5、CenterProgrammableLogicAssuranceReviewTestingAuditingWitnessingRespondentPLfamiliarity6UsageSurveyResponsesCenterARCDFRCGRCGSFCJPLJSCKSCLaRCMSFCSSCUsage34651951460Assurance00401302002surveysfromnon-NASAprojects7WhofilledouttheSurveys?UsingPL:Electronic/Comput

6、erengineers–15OtherEngineers–27Management–9Softwareengineer–1Other–3AssuringPL:Safety–6SoftwareAssurance–1Otherassurance-28PLUsedwithinNASAPLC–27FPGA–26ASIC–12EPLD,EEPLD–24SOC–6PAL-5Others-119PLUsageSurveyWhereisPLUsed?Facilities–19FlightSystems–21GroundSyste

7、ms–11Research–7FacilitiesarenearlyallPLC.PLCusedin3experimentsand2groundsystems10PLUsageSurveyRespondentPLDutiesUse,program,andassure–23Useandprogram–10Donotuse–7Use,program,orassure–2eachProgramandassure–2Design–3Other-411PLUsageSurveyPLAuthorHardwareenginee

8、r–31SoftwareEngineer–12Specialist–9Centercomputerscience–2Outsidesource/contractor–8Other–10HardwareSoftwareOtherPLC131013PLD20(3hw/sw)5712PLUsageSurveyPLProgrammingPLCLadderLogicFunction