modelsim

What didn't you understand about it?

Jon

will output a test file that has be red by the verilog code...both c++ and verilog is independent and c++ should be first before verilog after the file is obtained from the c++ simulator the verilog will start....how this can be achieved

will output a test file that has be red by the verilog code...both c++ and verilog is independent and c++ should be first before verilog after the file is obtained from the c++ simulator the verilog will start....how this can be achieved

Fazulu,

If I understand you want to fire-off a thread in C++ and then invoke the verilog in msim. While I am not sure this could be done but I think for all practical purposes you can model your system so that your logic design (verilog sim) starts first and then invokes C++ routines that comprise your system environment. I followed the commands and guidelines shown in msim's documentation for visual c. And that worked for me. What did not work was the cygwin commands they had listed.

-sanjay

will output a test file that has be red by the verilog code...both c++ and verilog is independent and c++ should be first before verilog after the file is obtained from the c++ simulator the verilog will start....how this can be achieved

Hai sanjay,

Exactly you r correct....but did u heard about qverilog command it is close to my requirement.....

But still i dont know how to invoke it..

regards, fazal

er

++ it will output a test file that has be red by the verilog code...both c+=

• and verilog is independent and c++ should be first before verilog after t= he file is obtained from the c++ simulator the verilog will start....how th= is can be achieved

Here is the page from msim's manual - although I doubt if you can still make the C++ code execute first. Arguable you can execute the C+

• code at time 0. But you still have to call launch vsim first after which it is going to execute c++ objects from the dll.

qverilog

The qverilog command compiles (vlog), optimizes (vopt), and simulates (vsim) Verilog and SystemVerilog designs in a single step. It combines the compile, elaborate, and simulate phases together, as some users may be accustomed to doing with NC-Sim. This command is provided to ease these users' transition to QuestaSim.

The qverilog command invokes vlog, vopt, and then vsim. All standard vlog (and vopt) arguments are supported and are applied directly to the qverilog command line. All vsim options are supported and are applied through the qverilog -R argument.

You can directly enter either C or C++ file onto the qverilog command line. QuestaSim automatically processes them using the SystemVerilog Direct Programming Interface (DPI). Refer to "DPI and the qverilog Command" for details. If your design contains DPI export tasks or functions, it is recommended that you use the vlog/vsim flow.

You can invoke the GUI by specifying the -gui argument through the qverilog -R argument.

By default, qverilog runs the simulation and quits automatically by invoking an implicit "run -all; quit -f". However, if you invoke qverilog with -do, -gui, or -I, qverilog invokes the simulator and keeps it open until you explicitly quit the tool.

The qverilog command creates a work library named work in the current directory, if not present already.

The command arguments listed below are only those unique to the qverilog command. This command also supports all vlog command arguments.

Syntax

qverilog [[]] [-ccflags "opts"] [-gui] [-l ] [-ldflags "opts"] [-R ] [-work ]

Arguments

• []

All vlog and vopt options are supported. For example, if you are running qverilog on a SystemVerilog design, you need to add the -sv argument to the command line.

• -ccflags "opts"

Specifies all C/C++ compiler options. Options are in quotes. Optional. For -ccflags and -ldflags, qverilog does not check the validity of the option(s) you specify. The options are directly passed on to the compiler and linker, and if they are not valid, an error message is generated by the compiler/linker.

• -gui

Simulates the design using the ModelSim GUI.

• -l

Creates a logfile/transcript compatible with vlog's -l logfile argument. Optional. If omitted, a default transcript called qverilog.log is created that collects the output from vlog, vopt, and vsim.

*

Specifies the name of the Verilog or C/C++ source code file to compile. One filename is required. Multiple filenames separated by spaces may be entered. Wildcards may be used. In the case of C files, they are automatically processed as DPI code.

• -l

dflags "opts"

Specifies all linker options in quotes. Optional. For -ccflags and -ldflags, qverilog does not check the validity of the option(s) you specify. The options are directly passed on to the compiler and linker, and if they are not valid, an error message is generated by the compiler/linker.

• -R

Specifies valid vsim arguments to be applied to the simulation. All vlog and vopt arguments must come before -R is specified, as all arguments specified after -R are interpreted as vsim arguments.

• -work

Specifies a logical name or pathname of a library that is to be mapped to the logical library work. Optional. By default, the compiled design units are added to the work library. The specified pathname overrides the pathname specified for work in the project file.

Examples

• Compile, optimize, and simulate the specified files. The C/C++ code contained in the d.c file is processed as DPI code, creating a shared object, and loading it into vsim at runtime. Creates a logfile named "logfile" and opens the QuestaSim GUI with the simulation loaded and ready to run.

qverilog -l logfile a.v b.v c.v d.c -R -gui

Questa SV/AFV Reference Manual, 6.3a

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