Candence数字仿真参数大全

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1、Candence数字仿真参数大全（Ncverilog，irun）=Ncverilog=ncverilog +access+wrc +nctimescale+1ns/100ps +libext+.v nospecify +incdir+$PATH +define+$urmicro +notimingcheck -l $urLogFile +nclibdirname+$urWorkDir -f $urFileList loadpli1=$urPliPath/libpli.so=Irun=irun -64bit l $LogFile f $FileList +abcd+efgk=”efgk” +no

2、timingcheck +delay_mode_distributed access +RWC timescale 1ns/10ps override_timescale -covfile $CovFile covdesign coverage covtest $CovDataBaseName covworkdir $CovPath -sysc gcc_vers $GccVersion scautoshell verilog=调试模式增加-gui linedebug$CovFileset_branch_scoringselect_coverage all $Design_topset_comd

3、eselect_coverage all module $ModuleNamedeselect_coverage all instance $InstanceNameset_toggle_excludefile bitexclude $CovExcludefile$CovExcludefilemodule $ModuleName.$signalinstance $InstanceName.$signal=我们知道，由于NC-Verilog使用了Native Compile Code的技术来加强电路模拟的效率，因此在进行模拟时必须经过compile(ncvlog命令）以及elaborate(nc

4、elab命令）的步骤。编译之后，针对每一个HDL设计单元会产生中间表达。接着elaborate命令会建立整个电 路的结构，产生可以用来模拟的资料。最后使用ncsim命令来进行模拟。 1、三命令模式(wolf评论：分步执行，了解即可，没有必要尝试！)命令如下：ncvlog -f run.fncealb tb -access wrcncsim tb -gui第一个命令中，run.f是整个的RTL代码的列表，值得注意的是，我们需要把tb文件放在首位，这样可以避免出现提示timescale的错误。第二个命令中，access选项是确定读取文件的权限。其中的tb是你的tb文件内的模块名字。第三个命令中，g

5、ui选项是加上图形界面值得注意的是，在这种模式下仿真，是用“- ”的。而下边要说的ncverilog是采用“+ ”的。 2、单命令模式ncverilog +access+wrc rtl +gui在这里，各参数与三命令模式相同。注意“+ ”。在本文里将详细讲述ncverilog的各种常用的参数，对于三命令模式，请读者自己查看资料。+cdslib+.设定你所仿真的库所在+define+macro .预编译宏的设定+errormax+整数当错误大于设定时退出仿真+incdir+path设定include的路径+linedebug允许在代码中设定line breakpoint(wolf评论：可以与+g

6、ui结合，利用simvision trace代码！)+log+logfile输出到名为logfile的文件中+status显示内存和CPU的使用情况+work工作库+access+w/r/c读取对象的权限,缺省为无读(-w)无写(-r)无连接(-c)+gui显示图形交互界面+input script_file输入脚本文件(wolf评论：可以通过此option输入tcl脚本)+licqueque如无licence等待licence(wolf评论：遇到licence紧张的情况，可以尝试一下！)+run如果在GUI交互界面下,启动后将自动开始仿真+loadpli1=.动态加入PLI+timescal

7、e设定仿真单位和精度(wolf评论：与nctimescale有何区别？)+nocopyright不显示版权信息+nospecifySuppresses timing checks and path delays in specify blocks.Ignore SDF annotations.+notimingcheckDont execute timing checks在Cadence Verilog仿真器中使用Verilog库：使用库文件在命令行中使用选项：-v file_name使用库目录在命令行中使用选项 y directory_name在命令行中使用选项 +libext+file_e

8、xtension(wolf评论：譬如 libext+.v)在使用库目录时，如果每个文件都有一个扩展名，则在Cadence Verilog仿真器必须用+libext选项指定其扩展名。仿真器中没有缺省地使用.v作扩展名使 用-v或-y选项指定库时，只编译那些设计中用到的模块。如果在命令行中直接输入库文件名而没有使用-v选项 （或在文件中使用编译指导include），则库中所有模块都被编译。使用选项大大压缩编译时间及内存空间。在NC Verilog中也压缩了使用的磁盘空间。3、命令大全1.ncvlog options source_file .Options:-DEFINE - Defines a

9、macro-FILE - Load command line arguments from rmation-MESSAGES- Specifies printing of informative messages-NOCOPYRIGHT- Suppresses printing of copyright banner-NOSTDOUT- Turn off output to screen-NOWARN - Disables printing of the specified warning messageExamples:- To compile all the modules in sour

10、ce.v% ncvlog source.v- To compile with informative messages% ncvlog -messages source.v2. ncelabncelab options lib.cell:viewOptions:-MESSAGES- Specifies printing of informative messages-NOCOPYRIGHT- Suppresses printing of copyright banner-NOSTDOUT- Turn off output to screen-TIMESCALE - Set default ti

11、mescale on Verilog modules.-ACCESS - Set default access visibility. +rwc turn on read/write/connectivity.-FILE - Load command line arguments from -LOADPLI1 - Specify the library_name:boot_routine(s) to dynamically load a PLI1.0 application-MAXDELAYS- Selects maximum delays for simulation-MINDELAYS-

12、Selects minimum delays for simulation-TYPDELAYS- Selects typical delays for simulation-NONEG_TCHK- Disallow negative values in SETUPHOLD & RECREM timing checks-NONOTIFIER- Notifiers are ignored in timing checks.-NOSPECIFY- Dont execute timing checks, ignore path delays and skip SDF annotations.-NOTI

13、MINGCHECKS- Dont execute timing checks-NOWARN - Disables printing of the specified warning message-NO_TCHK_MSG- Turn off timing check warnings-SDF_NO_WARNINGS- Do not report SDF warningsExamples:- To elaborate my_lib.top:behav% ncelab my_lib.top:behav% ncelab my_lib.top% ncelab top- To elaborate wit

14、h informative messages% ncelab -messages my_lib.top:behav3. ncsimncsim options lib.cell:viewOptions:-FILE - Load command line arguments from -GUI- Enter window mode before running simulation-INPUT - Script to be executed during initialization-MESSAGES- Specifies printing of informative messages-NOCO

15、PYRIGHT- Suppresses printing of copyright banner-NONTCGLITCH- Suppress delayed net glitch suppression messages-NOSTDOUT- Turn off output to screen-NOWARN - Disables printing of the specified warning message-SDF_NO_WARNINGS- Do not report SDF warningsExamples:- To simulate the snapshot my_lib.top:sna

16、p% ncsim my_lib.top:snap% ncsim my_lib.top% ncsim top- To simulate while writing to the log file ./ncsim.log% ncsim -log ./ncsim.log my_lib.top:snap- To update the snapshot my_lib.top:snap and simulate% ncsim -update my_lib.top:snap4. ncverilogncverilog all valid Verilog-XL argumentsSupported Dash o

17、ptions:-f Read host command arguments from fileSupported plus options:+access+Turn on Read, Write and/or Connectivity Access+define+Define a macro from commandline+loadpli1=Specify the library_name:boot_routine(s) to dynamically load a PLI1.0 application from commandline+maxdelaysSelects maximum del

18、ays for simulation+mindelaysSelects minimum delays for simulation+typdelaysSelects typical delays for simulation+ncdumpports_format+Specify EVCD format flag for $dumpports+neg_tchkAllow negative values in SETUPHOLD & RECREM timing checks (default)+noneg_tchkDisallow negative values in SETUPHOLD & RE

19、CREM timing checks+nocopyrightSuppresses printing of copyright banner+no_notifierNotifiers are ignored in timing checks+nosdfwarnDo not report SDF warnings+nospecifySuppresses timing checks and path delays in specify blocks.Ignore SDF annotations.+nostdoutTurn off output to screen(terminal)+notchkms

20、gTurn off timing check warnings+notimingcheckDont execute timing checks+nowarn+Disables printing of the specified warning message+sdf_nowarningsDo not report SDF warnings5. ncsdfcncsdfc options sdf_fileOptions:-COMPILE- Compile the specified SDF files (default)-DECOMPILE- Decompile the specified SDF

21、 files-LOGFILE - Specifies the file to contain log information-MESSAGES- Specifies printing of informative messages-NOCOPYRIGHT- Suppresses printing of copyright banner-OUTPUT - Redirects compiled SDF output to the specified file-WORSTCASE_ROUNDING - Truncate min delays, round max delays upExamples:

22、- To compile an SDF file:% ncsdfc dcache.sdfCreates compiled SDF file - To specify a name for the compiled SDF file:% ncsdfc ipipe.sdf -OUTPUT piledCreates compiled SDF file piled- To decompile a compiled SDF file:% ncsdf -DECOMPILE Creates decompiled SDF file - To specify a name for the decompiled

23、SDF file:% ncsdfc -DECOMPILE -OUTPUT ebox.sdfdCreates decompiled SDF file ebox.sdfd6. nchelpnchelp options tool errornchelp -cdslib | -hdlvarExamples:- To find help on the error CUVWSP from ncelab% nchelp ncelab CUVWSP- To find help on the error BADCLP from ncvlog% nchelp ncvlog BADCLP- To list the currently defined libraries% nchelp -cdslib- To list the currently supported tools% nchelp -tools- To list the help for all supported tools with the BADCLP mnemonic% nchelp -all BADCLP