ModelSim SE User's Manual - Electrical and Computer Engineering

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UM-584 D - Verilog PLI / VPI / DPI DPI example ModelSim SE User’s Manual The following example is a trivial, but complete DPI application. For win32 and RS6000 platforms, one additional step is required along with some new arguments. For the latest detailed instructions for compiling and simulating DPI imported and exported tasks and functions, see the modeltech/examples/dpi directory. There you will find examples with a subdirectory for each platform that contains the platform specific commands and arguments. hello_c.c: #include "svdpi.h" #include "dpiheader.h" int c_task(int i, int *o) { printf("Hello from c_task()\n"); verilog_task(i, o); /* Call back into Verilog */ *o = i; return(0); /* Return success (required by tasks) */ } hello.v: module hello_top; int ret; export "DPI" task verilog_task; task verilog_task(input int i, output int o); #10; $display("Hello from verilog_task()"); endtask import "DPI" context task c_task(input int i, output int o); initial begin c_task(1, ret); // Call the c task named 'c_task()' end endmodule Compile the Verilog code: % vlib work % vlog -sv -dpiheader dpiheader.h hello.v Compile the DPI code for the Solaris operating system: % gcc -c -g -I/modeltech/include hello_c.c % ld -G -o hello_c.so hello_c.o Simulate the design: % vsim -c -sv_lib hello_c hello_top # Loading work.hello_c # Loading ./hello_c.so VSIM 1> run -all # Hello from c_task() # Hello from verilog_task() VSIM 2> quit
The PLI callback reason argument The PLI callback reason argument UM-585 The second argument to a PLI callback function is the reason argument. The values of the various reason constants are defined in the veriuser.h include file. See IEEE Std 1364 for a description of the reason constants. The following details relate to ModelSim Verilog, and may not be obvious in the IEEE Std 1364. Specifically, the simulator passes the reason values to the misctf callback functions under the following circumstances: reason_endofcompile For the completion of loading the design. reason_finish For the execution of the $finish system task or the quit command. reason_startofsave For the start of execution of the checkpoint command, but before any of the simulation state has been saved. This allows the PLI application to prepare for the save, but it shouldn't save its data with calls to tf_write_save() until it is called with reason_save. reason_save For the execution of the checkpoint command. This is when the PLI application must save its state with calls to tf_write_save(). reason_startofrestart For the start of execution of the restore command, but before any of the simulation state has been restored. This allows the PLI application to prepare for the restore, but it shouldn't restore its state with calls to tf_read_restart() until it is called with reason_restart. The reason_startofrestart value is passed only for a restore command, and not in the case that the simulator is invoked with -restore. reason_restart For the execution of the restore command. This is when the PLI application must restore its state with calls to tf_read_restart(). reason_reset For the execution of the restart command. This is when the PLI application should free its memory and reset its state. We recommend that all PLI applications reset their internal state during a restart as the shared library containing the PLI code might not be reloaded. (See the -keeploaded (CR-376) and -keeploadedrestart (CR-376) arguments to vsim for related information.) reason_endofreset For the completion of the restart command, after the simulation state has been reset but before the design has been reloaded. reason_interactive For the execution of the $stop system task or any other time the simulation is interrupted and waiting for user input. reason_scope For the execution of the environment command or selecting a scope in the structure window. Also for the call to acc_set_interactive_scope() if the callback_flag argument is non-zero. reason_paramvc For the change of value on the system task or function argument. ModelSim SE User’s Manual
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ModelSim® Advanced Verification an
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Table of Contents 1 - Introduction
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Delta delays . . . . . . . . . . .
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ModelSim Verilog system tasks and f
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VHDL: instantiating SystemC . . . .
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Creating waveforms from patterns .
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14 - PSL Assertions (UM-359) What a
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17 - Signal Spy (UM-417) Introducti
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Starting the debugger . . . . . . .
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Steps in flow . . . . . . . . . . .
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1 - Introduction Chapter contents M
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ModelSim simulation task overview M
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Basic steps for simulation UM-25 Li
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ModelSim modes of operation ModelSi
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ModelSim graphic interface overview
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Sections in this document Sections
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Sections in this document UM-33 H -
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Where to find our documentation Whe
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2 - Projects Chapter contents Intro
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Project conversion between versions
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workspace Getting started with proj
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Step 3 — Compiling the files Gett
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The Project tab Sorting the list Th
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Grouping files Changing compile ord
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Optimization Configurations Creatin
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Organizing projects with folders UM
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Specifying file properties and proj
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Accessing projects from the command
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3 - Design libraries Chapter conten
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Archives Design library overview UM
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Managing library contents Working w
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Moving a library Working with desig
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Alternate IEEE libraries supplied R
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Referencing source files with locat
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Importing FPGA libraries Importing
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4 - VHDL simulation Chapter content
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Compiling VHDL files Creating a des
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Differences between language versio
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Compiling VHDL files UM-77 bit stri
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Default binding Simulating VHDL des
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Simulating VHDL designs UM-81 In th
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Creating an elaboration file Loadin
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Example Simulating with an elaborat
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Controlling checkpoint file compres
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Using STD_INPUT and STD_OUTPUT with
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Reading and writing hexadecimal num
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VITAL specification and source code
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Compiling and simulating with accel
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init_signal_driver() init_signal_sp
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to_time() Util package UM-99 to_tim
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Modeling memory ’87 and ’93 exa
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if (mwrite = '1') then ram(address)
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BEGIN return mem(to_integer(addr));
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BEGIN FOR i IN 0 TO 1023 LOOP we
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Converting an integer into a bit_ve
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5 - Verilog simulation Chapter cont
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Introduction ModelSim Verilog basic
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Incremental compilation Compiling V
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Library usage Compiling Verilog fil
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Verilog-XL compatible compiler argu
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Compiling Verilog files UM-121 The
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Verilog generate statements Compili
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Naming the optimized design Optimiz
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Optimizing Verilog designs UM-127 I
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Simulating Verilog designs Simulato
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`timescale, -t, and rounding Simula
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Simulating Verilog designs UM-133 T
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Simulating Verilog designs UM-135 M
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+pulse_e_style_onevent +pulse_int_e
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Creating an elaboration file Loadin
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Example Simulating with an elaborat
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Controlling checkpoint file compres
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Distributed delay mode In distribut
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System tasks and functions UM-147 a
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File I/O tasks $fclose $fopen $fwri
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System tasks and functions UM-151 T
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Compiler directives Compiler direct
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ModelSim compiler directives The fo
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Determining which memories were imp
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6 - SystemC simulation Chapter cont
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Supported platforms and compiler ve
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Usage flow for SystemC-only designs
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Code modification examples Compilin
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Example 3 Compiling SystemC files U
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Restrictions on compiling with HP a
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Issues with C++ templates Templatiz
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Simulating SystemC designs Loading
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Initialization and cleanup of Syste
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Waveform compare Debugging the desi
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Debugging the design UM-179 The gdb
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Viewing FIFOs SystemC object and ty
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OSCI 2.1 features supported Differe
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Troubleshooting SystemC errors UM-1
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7 - Mixed-language simulation Chapt
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Usage flow for mixed-language simul
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Simulator resolution limit Runtime
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Mapping data types Verilog to VHDL
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VHDL to Verilog mappings Mapping da
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Channels Ports Verilog mapping sc_b
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Verilog sc_logic sc_bit bool SuX 'X
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SystemC VHDL sc_int, sc_uint bit_ve
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VHDL: instantiating Verilog Verilog
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The generic type is determined by t
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Verilog: instantiating VHDL VHDL in
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SystemC: instantiating Verilog Veri
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Example #2 SystemC: instantiating V
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}; } #endif // Connect ports chip->
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Example of parameter use format_cha
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SystemC: instantiating VHDL VHDL in
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Example SystemC: instantiating VHDL
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); END ringbuf; ARCHITECTURE RTL OF
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vgencomp component declaration vgen
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8 - WLF files (datasets) and virtua
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Saving a simulation to a WLF file O
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Managing multiple datasets WLF file
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Saving at intervals with Dataset Sn
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Virtual Objects (User-defined buses
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Virtual regions Virtual types Virtu
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9 - Waveform analysis Chapter conte
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Introduction Objects you can view W
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Wave window overview UM-241 Here is
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List window overview List window ov
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Measuring time with cursors in the
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Jumping to a signal transition Meas
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Zooming the Wave window display Zoo
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Searching in the Wave and List wind
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Using the Expression Builder for ex
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Formatting the Wave window Setting
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Formatting the Wave window UM-257 3
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Formatting the List window Setting
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Saving the window format Saving the
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Saving List window data to a file S
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Configuring new line triggering in
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Configuring new line triggering in
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Miscellaneous tasks Examining wavef
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Comparison Wizard Waveform Compare
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Test Dataset Waveform Compare UM-27
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Adding regions Waveform Compare UM-
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Clocked comparison Waveform Compare
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Viewing differences in the Wave win
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Compare icons Waveform Compare UM-2
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Comparing hierarchical and flattene
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10 - Generating stimulus with Wavef
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Getting started You can use Wavefor
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Creating waveforms from patterns Cr
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Editing waveforms GR-291 These comm
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Simulating directly from waveform e
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Driving simulation with the saved s
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Saving the waveform editor commands
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11 - Tracing signals with the Dataf
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Adding objects to the window Adding
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Exploring the connectivity of your
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Zooming and panning Zooming with to
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Tracing the source of an unknown (X
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Finding objects by name in the Data
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Printing on Windows platforms Selec
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Symbol mapping Symbol mapping UM-31
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Configuring window options Configur
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12 - Profiling performance and memo
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Getting started Memory allocation p
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Enabling the statistical sampling p
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Interpreting profiler data Interpre
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The Call Tree view Viewing profiler
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Viewing profile details Viewing pro
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Integration with Source windows Int
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Reporting profiler results Reportin
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13 - Measuring code coverage Chapte
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Supported types ModelSim code cover
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Enabling code coverage Enabling cod
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Enabling code coverage UM-339 Next,
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Viewing coverage data in the Source
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Toggle coverage Enabling Toggle cov
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3 Produce the report with the toggl
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Excluding objects from coverage Exc
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end instance Default filter file Ex
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XML output Reporting coverage data
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Instance report with line details R
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Coverage statistics details Conditi
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Coverage statistics details UM-357
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14 - PSL Assertions Chapter content
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PSL assertion language What are ass
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Using cover directives Using assert
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REF2); signal mem_state : memory_st
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} // Check the write cycle property
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Multi-clocked properties and defaul
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Using endpoints in HDL code Example
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Restrictions Clocking endpoints Usi
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Compiling and simulating assertions
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Enabling/disabling failure and pass
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Setting failure and pass limits Man
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Reporting on assertions Reporting o
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15 - Functional coverage with PSL a
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Compiling and simulating functional
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Weighting coverage directives Confi
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Viewing coverage directives in the
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Reporting functional coverage stati
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Tag Meaning Understanding aggregate
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Saving functional coverage data Sav
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Clearing functional coverage data C
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16 - C Debug Chapter contents Intro
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Supported platforms and gdb version
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Setting breakpoints Setting breakpo
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Stepping in C Debug Stepping in C D
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Identifying all registered function
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Auto find bp versus Auto step mode
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Debugging functions during elaborat
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VPI functions in initialization mod
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C Debug command reference C Debug c
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17 - Signal Spy Chapter contents In
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init_signal_driver Call only once S
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Example library IEEE, modelsim_lib;
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Arguments Related procedures Limita
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signal_force Syntax Returns Argumen
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signal_release Syntax Returns Argum
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$init_signal_driver Call only once
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Example `timescale 1 ps / 1 ps modu
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Related tasks Limitations Example N
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Related tasks Limitations Example N
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Example module testbench; reg relea
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18 - Standard Delay Format (SDF) Ti
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SDF specification with the GUI Erro
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Resolving errors VHDL VITAL SDF UM-
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Examples Optional arguments can be
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REMOVAL is matched to $removal: SDF
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Optional conditions Timing check po
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Interconnect delays Interconnect de
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Mistaking a component or module nam
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19 - Value Change Dump (VCD) Files
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Checkpoint/restore and writing VCD
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Example 3 — Mixed-HDL design Firs
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ModelSim VCD commands and VCD tasks
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A VCD file from source to output VH
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x) x* x+ x, $end #300 $dumpon 1! 0"
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Capturing port driver data Supporte
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Example VCD output from vcd dumppor
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20 - Tcl and macros (DO files) Chap
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Tcl commands Tcl commands UM-473 Fo
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Tcl command syntax UM-475 7 If a wo
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set command syntax Tcl command synt
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Variable substitution System comman
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ModelSim Tcl time commands Conversi
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Tcl examples This is an example of
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} if {$windowName == ""} { # Dialog
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Macros (DO files) Creating DO files
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set vFilesExist 1 } shift } if {$vh
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Using the Tcl source command with D
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The Tcl Debugger Starting the debug
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Breakpoints The Tcl Debugger UM-495
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TclPro Debugger TclPro Debugger UM-
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A - ModelSim GUI changes Appendix c
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Main window changes UM-501 See "Cus
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Main window changes UM-503 File > O
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View menu The View menu has been re
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Tools menu The 6.0 Main window Tool
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List window changes File menu The L
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File menu See "Memory windows" (GR-
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View menu The Memory window > View
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Edit menu The Signals window > Edit
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View menu The Source window > File
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B - ModelSim variables Appendix con
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Environment variables Environment v
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Library mapping with environment va
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[Library] library path variables Va
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[vcom] VHDL compiler control variab
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[vsim] simulator control variables
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Preference variables located in INI
Page 533 and 534: Preference variables located in INI
Page 535 and 536: Preference variables located in INI
Page 537 and 538: Commonly used INI variables Prefere
Page 539 and 540: Force command defaults Preference v
Page 541 and 542: Variable precedence Variable preced
Page 543 and 544: Special considerations for the now
Page 545 and 546: C - Error and warning messages Appe
Page 547 and 548: ModelSim message system UM-547 Ther
Page 549 and 550: Exit codes The table below describe
Page 551 and 552: Miscellaneous messages Miscellaneou
Page 553 and 554: Miscellaneous messages UM-553 model
Page 555 and 556: VSIM license lost Message text Cons
Page 557 and 558: Suggested action Multiply defined s
Page 559 and 560: D - Verilog PLI / VPI / DPI Chapter
Page 561 and 562: Registering PLI applications Regist
Page 563 and 564: Registering VPI applications Exampl
Page 565 and 566: Registering DPI applications Regist
Page 567 and 568: For Windows only: Run a preliminary
Page 569 and 570: 32-bit Linux platform Compiling and
Page 571 and 572: gcc compiler gcc -c -I//modeltech/i
Page 573 and 574: For DPI imports 64-bit IBM RS/6000
Page 575 and 576: 32-bit Linux platform Compiling and
Page 577 and 578: 64-bit Solaris platform Compiling a
Page 579 and 580: 64-bit IBM RS/6000 platform DPI spe
Page 581 and 582: Loading shared objects with global
Page 583: VPI example The following example i
Page 587 and 588: The sizetf callback function The si
Page 589 and 590: Third party PLI applications Third
Page 591 and 592: IEEE Std 1364 ACC routines IEEE Std
Page 593 and 594: IEEE Std 1364 TF routines IEEE Std
Page 595 and 596: SystemVerilog DPI access routines S
Page 597 and 598: Verilog-XL compatible routines Veri
Page 599 and 600: PLI/VPI tracing The purpose of trac
Page 601 and 602: Debugging PLI/VPI/DPI application c
Page 603 and 604: E - ModelSim shortcuts Appendix con
Page 605 and 606: Main and Source window mouse and ke
Page 607 and 608: Keystrokes - UNIX Keystrokes - Wind
Page 609 and 610: Wave window mouse and keyboard shor
Page 611 and 612: F - System initialization Appendix
Page 613 and 614: Environment variables accessed duri
Page 615 and 616: Initialization sequence Initializat
Page 617 and 618: G - Logic Modeling SmartModels Appe
Page 619 and 620: Creating foreign architectures with
Page 621 and 622: Vector ports Entity details VHDL Sm
Page 623 and 624: SmartModel Windows VHDL SmartModel
Page 625 and 626: Verilog SmartModel interface Verilo
Page 627 and 628: H - Logic Modeling hardware models
Page 629 and 630: Creating foreign architectures with
Page 631 and 632: Vector ports Architecture details V
Page 633 and 634: End-User License Agreement IMPORTAN
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COMPLIED WITH THIS AGREEMENT. MENTO
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Graphics shall only use or disclose
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Index CR = Command Reference, UM =
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Stop on quit mode UM-414 C Debug se
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mem search CR-204 modelsim CR-206 n
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ange checking in VHDL CR-316, UM-74
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Add Folder GR-47 C Debug setup GR-9
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F -f CR-360 F8 function key UM-607
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Verilog modules UM-125 VHDL subprog
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Memory window GR-169 GUI changes UM
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optimizing Verilog designs design o
Page 657 and 658:
eaders and drivers UM-303 readers c
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adix specifying for examine CR-163
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system tasks VCD UM-461 Verilog UM-
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U -u CR-365 unbound component GR-53
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library clause UM-64 mixed designs
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text editing UM-605 windows Active
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