Candence数字仿真参数大全

=======================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 \\

-bit –l $LogFile –f $FileList +abcd+efgk=”efgk” \\

+notimingcheck +delay_mode_distributed –access +RWC –timescale 1ns/10ps –override_timescale \\

-covfile $CovFile –covdesign coverage –covtest $CovDataBaseName –covworkdir $CovPath \\

-sysc –gcc_vers $GccVersion –scautoshellverilog

=================================================================== 调试模式增加 -gui –linedebug

$CovFile

set_branch_scoring

select_coverage –all $Design_top„ set_com<屏蔽常数项>

deselect_coverage –all module $ModuleName„<屏蔽Module>

deselect_coverage –all instance $InstanceName„<屏蔽instance>

set_toggle_excludefile –bitexclude $CovExcludefile<按比特位屏蔽信号，支持通配符>

$CovExcludefile

module $ModuleName.$signal instance $InstanceName.$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(ncelab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.f

ncealbtb -access wrc ncsimtb -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，gui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+wrcrtl +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+gui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

+timescale 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

+nospecify Suppresses timing checks and path delays in specify blocks.

Ignore SDF annotations.

+notimingcheck Don't 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_extension(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 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 message Examples:

-- To compile all the modules in source.v % ncvlogsource.v

-- To compile with informative messages % ncvlog -messages source.v

2. ncelab

ncelab [options] [lib.]cell[:view] Options:

-MESSAGES -- Specifies printing of informative messages

-NOCOPYRIGHT -- Suppresses printing of copyright banner

-NOSTDOUT -- Turn off output to screen

-TIMESCALE -- Set default timescale 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 -- 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 -- Don't execute timing checks, ignore path delays and skip SDF annotations. -NOTIMINGCHECKS -- Don't 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 warnings Examples:

-- To elaborate my_lib.top:behav % ncelabmy_lib.top:behav % ncelabmy_lib.top % ncelab top

-- To elaborate with informative messages % ncelab -messages my_lib.top:behav 3. ncsim

ncsim [options] [lib.]cell[:view] Options:

-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

-NOCOPYRIGHT -- 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 warnings Examples:

-- To simulate the snapshot my_lib.top:snap % ncsimmy_lib.top:snap % ncsimmy_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:snap

4. ncverilog

ncverilog [all valid Verilog-XL arguments] Supported Dash options:

-f Read host command arguments from file Supported 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

+maxdelays Selects maximum delays for simulation

+mindelays Selects minimum delays for simulation

+typdelays Selects typical delays for simulation

+ncdumpports_format+ Specify EVCD format flag for $dumpports

+neg_tchk Allow negative values in SETUPHOLD & RECREM timing checks (default)

+noneg_tchk Disallow negative values in SETUPHOLD & RECREM timing checks

+nocopyright Suppresses printing of copyright banner

+no_notifier Notifiers are ignored in timing checks

+nosdfwarn Do not report SDF warnings

+nospecify Suppresses timing checks and path delays in specify blocks.

Ignore SDF annotations.

+nostdout Turn off output to screen(terminal)

+notchkmsg Turn off timing check warnings

+notimingcheck Don't execute timing checks

+nowarn+ Disables printing of the specified warning message

+sdf_nowarnings Do not report SDF warnings

5. ncsdfc

ncsdfc [options] sdf_file Options:

-COMPILE -- Compile the specified SDF files (default)

-DECOMPILE -- Decompile the specified SDF 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 up Examples:

-- To compile an SDF file: % ncsdfcdcache.sdf

Creates compiled SDF file dcache.sdf.X -- To specify a name for the compiled SDF file: % ncsdfcipipe.sdf -OUTPUT ipipe.compiled Creates compiled SDF file ipipe.compiled -- To decompile a compiled SDF file: % ncsdf -DECOMPILE ebox.sdf.X

Creates decompiled SDF file ebox.sdf.X.sdfd -- To specify a name for the decompiled SDF file:

% ncsdfc -DECOMPILE ebox.sdf.X -OUTPUT ebox.sdfd Creates decompiled SDF file ebox.sdfd

6. nchelp

nchelp [options] tool error nchelp [-cdslib | -hdlvar] Examples:

-- To find help on the error CUVWSP from ncelab % nchelpncelab CUVWSP

-- To find help on the error BADCLP from ncvlog % nchelpncvlog 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