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FPGADDA,,(350108):FPGAARM9,FPGA,,、。:FPGA;;:TP21:TM571:A:1673-4629(2010)05-0047-04:2009-10-28:,,,,:。:2006([2006]804)。JOURNALOFLONGYANUNIVERSITY201010285October2010Vol.28No.5,[1],,,,,。,。“”,。,。[2],,。[3]500KHz,2μs,。,FPGA,FPGA+ARM9,。1ARM+FPGAARM+FPGA1,ARM920TS3C2410,[4];FPGA,NiosS3C2410,DDA。1ARM+FPGA1.1S3C2410,,,、、[5],;LCD、,。S3C2410RS232、RS485、、USB。。1.2FPGA2,FPGA、、。Nios。S3C2410,;,47,;,1,1,,。,。NiosIIAltera32。SOPCbuilderNiosII,。,NiosIIavlaonIP,IP。2FPGA2FPGADDA2.1NIOSCPUavlaonFPGA。FPGAavlaonIP。ARM、;NIOSCPUavlaon。:“if(ngcs==1’b0)”//ARMFPGA,FPGA。,“case({addr,we,rd})”。:7’b0000101:beginrs_out=dinout;we_rs=1;end7’b0000110:beginla_data=rs_in;rd_rs=1’b1;endcase,“we_rs”,ARM“dinout”“rs_out”。“rd_rs”,“rs_in”“la_data”,ARM。2.2DDA(DigitalDifferentialAnalyzer),,。,,,。DDA。(1)1μm,30m/min,8.192ms,500KHz;,△Lmax=4.096mm,12。3。3,,,,;,,,,;500KHz,2μs,5,4,t0,;t14096,8.192ms,,t2clk,48t2,;t34096,,,t0,。,,1/4,1/2。t0,,。4(2),verloghdl,、。:ModuleFIFO_16_16(clk_write,clk_read,read,write,fifo_in,fifo_out,fifo_empty,fifo_full,fifo_half);//////endmodule:Modulefdiv_500khz(clk_in,clk_out0,clk_out1,clk_out2,clk_out3,clk_2μs);//2μs44endmodule:Moduleinterpolate(reset_n,start,data_in,inc_clk,latch_clk,req_clk,load_clk,req_none,pulse_out,req_dat);////8.192ms//8.192ms//,Endmodule3DDAquartus!。,FPGA。5:55pulse_outreq_dat,,。,,。,DS1102CA(:100MHz,:2GSa/s),6,CH1,CH2,500KHz,2μs,30m/min。64,。FPGA,FPGA,Nios,DDA。FPGA50KHz500KHz,,、。49(23)StudyonMulti-levelExtensibleModelinSecurityAssessmentsofEnterprises'InformationSystemCAIXin-xiaAbstract:Enterprisesneedtotakeanewlookatinformationsystemsecurityissues,andconductascientificandrationalassessmentonthesecurityoftheinformationsystem.Basedondifferentlevelsofinformationsystem,evaluationsonitssecurityhavebeencarriedoutfromthesystem’sphysicalaspect,network,theoperatingsys-tem,applicationandthemanagementlevel,andamulti-levelextensionmodelofinformationsystemsecurityas-sessmentisalsoestablished.Thepracticabilityofthemodelisfurtherillustratedandtestedbythedemonstrationofthealgorithm.Keywords:informationsystem;securityassessment;multi-levelmodelDesignandImplementationofDDAInterpolationModuleofEmbeddedCNCSystemBasedonFPGASHAOMing,LIGuang-yang,YANGHui-lingAbstract:High-speedandhigh-capacityFPGAisappliedintheembeddedCNCsystembasedonARM9toconnectthesystemandtheFPGAandtocompletethedesignoffunctioncontrol,realizingfineinterpolationofincrementalimputationofCNCsystem.Theresultshowsthatthedesigncaneffectivelysolvetheshortcomingsinopen-loopdigitalcontrolsystemwithsingle-processor,whichislowinspeedandpoorinperformance.Keywords:FPGA;embeddedCNCsystem;interpolator:[1],.C[J].,2008(17):2032-2036.[2].[J].,2007(9):31-33.[3],,.ARMFPGA[J].,2007(2):93-94.[4],,.[J].,2008(6):10-14.[5].ARMFPGA[D].:,2004:3-6.〔:〕!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!50
本文标题:基于FPGA的嵌入式数控系统DDA插补器模块设计与实现
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