ModelSim SE User's Manual - Electrical and Computer Engineering

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UM-24 1 - Introduction Basic steps for simulation ModelSim SE User’s Manual This section provides further detail related to each step in the process of simulating your design using ModelSim. Step 1 - Collecting Files and Mapping Libraries Files needed to run ModelSim on your design: design files (VHDL, Verilog, and/or Sy stemC), including stimulus for the design libraries, both working and resource modelsim.ini (automatically creat ed by the library mapping command Providing stimulus to the design You can provide stimulus to your design in several ways: Language based testbench Tcl-based ModelSim interactive command, force (CR-180) VCD files / commands See "Using extended VCD as stimulus" (UM-458) and "Using extended VCD as stimulus" (UM-458) 3rd party testbench generation tools What is a library in ModelSim? A library is a location where data to be used for simulation is stored. Libraries are ModelSim’s way of managing the creation of data before it is needed for use in simulation. It also serves as a way to streamline simulation invocation. Instead of compiling all design data each and every time you simulate, ModelSim uses binary pre-compiled data from these libraries. So, if you make a changes to a single Verilog module, only that module is recompiled, rather than all modules in the design. Working and resource libraries Design libraries can be used in two ways: 1) as a local working library that contains the compiled version of your design; 2) as a resource library. The contents of your working library will change as you update your design and recompile. A resource library is typically unchanging, and serves as a parts source for your design. Examples of resource libraries might be: shared information within your group, vendor libraries, packages, or previously compiled elements of your own working design. You can create your own resource libraries, or they may be supplied by another design team or a third party (e.g., a silicon vendor). For more information on resource libraries and working libraries, see "Working library versus resource libraries" (UM-58), "Managing library contents" (UM-61), "Working with design libraries" (UM-60), and "Specifying the resource libraries" (UM-64). Creating the logical library - vlib Before you can compile your source files, you must create a library in which to store the compilation results. You can create the logical library using the GUI, using File > New >
Basic steps for simulation UM-25 Library (see "Creating a library" (UM-60)), or you can use the vlib (CR-356) command. For example, the command: vlib work creates a library named work. By default, compilation results are stored in the work library. Mapping the logical work to the physical work directory - vmap VHDL uses logical library names that can be mapped to ModelSim library directories. If libraries are not mapped properly, and you invoke your simulation, necessary components will not be loaded and simulation will fail. Similarly, compilation can also depend on proper library mapping. By default, ModelSim can find libraries in your current directory (assuming they have the right name), but for it to find libraries located elsewhere, you need to map a logical library name to the pathname of the library. You can use the GUI ("Library mappings with the GUI" (UM-62), a command ("Library mappings with the GUI" (UM-62)), or a project ("Getting started with projects" (UM-40) to assign a logical name to a design library. The format for command line entry is: vmap This command sets the mapping between a logical library name and a directory. Step 2 - Compiling the design with vlog/vcom/sccom Designs are compiled with one of the three language compilers. Compiling Verilog - vlog ModelSim’s compiler for the Verilog modules in your design is vlog (CR-358). Verilog files may be compiled in any order, as they are not order dependent. See "Compiling Verilog files" (UM-114) for details. Verilog portions of the design can be optimized for better simulation performance. See "Optimizing Verilog designs" (UM-124) for details. Compiling VHDL - vcom ModelSim’s compiler for VHDL design units is vcom (CR-311). VHDL files must be compiled according to the design requirements of the design. Projects may assist you in determining the compile order: for more information, see"Auto-generating compile order" (UM-46). See "Compiling VHDL files" (UM-73) for details. on VHDL compilation. Compiling SystemC - sccom ModelSim’s compiler for SystemC design units is sccom (CR-254), and is used only if you have SystemC components in your design. See "Compiling SystemC files" (UM-164) for details. ModelSim SE User’s Manual
Page 1 and 2: ModelSim® Advanced Verification an
Page 3 and 4: Table of Contents 1 - Introduction
Page 5 and 6: Delta delays . . . . . . . . . . .
Page 7 and 8: ModelSim Verilog system tasks and f
Page 9 and 10: VHDL: instantiating SystemC . . . .
Page 11 and 12: Creating waveforms from patterns .
Page 13 and 14: 14 - PSL Assertions (UM-359) What a
Page 15 and 16: 17 - Signal Spy (UM-417) Introducti
Page 17 and 18: Starting the debugger . . . . . . .
Page 19 and 20: Steps in flow . . . . . . . . . . .
Page 21 and 22: 1 - Introduction Chapter contents M
Page 23: ModelSim simulation task overview M
Page 27 and 28: ModelSim modes of operation ModelSi
Page 29 and 30: ModelSim graphic interface overview
Page 31 and 32: Sections in this document Sections
Page 33 and 34: Sections in this document UM-33 H -
Page 35 and 36: Where to find our documentation Whe
Page 37 and 38: 2 - Projects Chapter contents Intro
Page 39 and 40: Project conversion between versions
Page 41 and 42: workspace Getting started with proj
Page 43 and 44: Step 3 — Compiling the files Gett
Page 45 and 46: The Project tab Sorting the list Th
Page 47 and 48: Grouping files Changing compile ord
Page 49 and 50: Optimization Configurations Creatin
Page 51 and 52: Organizing projects with folders UM
Page 53 and 54: Specifying file properties and proj
Page 55 and 56: Accessing projects from the command
Page 57 and 58: 3 - Design libraries Chapter conten
Page 59 and 60: Archives Design library overview UM
Page 61 and 62: Managing library contents Working w
Page 63 and 64: Moving a library Working with desig
Page 65 and 66: Alternate IEEE libraries supplied R
Page 67 and 68: Referencing source files with locat
Page 69 and 70: Importing FPGA libraries Importing
Page 71 and 72: 4 - VHDL simulation Chapter content
Page 73 and 74: Compiling VHDL files Creating a des
Page 75 and 76:
Differences between language versio
Page 77 and 78:
Compiling VHDL files UM-77 bit stri
Page 79 and 80:
Default binding Simulating VHDL des
Page 81 and 82:
Simulating VHDL designs UM-81 In th
Page 83 and 84:
Creating an elaboration file Loadin
Page 85 and 86:
Example Simulating with an elaborat
Page 87 and 88:
Controlling checkpoint file compres
Page 89 and 90:
Using STD_INPUT and STD_OUTPUT with
Page 91 and 92:
Reading and writing hexadecimal num
Page 93 and 94:
VITAL specification and source code
Page 95 and 96:
Compiling and simulating with accel
Page 97 and 98:
init_signal_driver() init_signal_sp
Page 99 and 100:
to_time() Util package UM-99 to_tim
Page 101 and 102:
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
Page 111 and 112:
5 - Verilog simulation Chapter cont
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Introduction ModelSim Verilog basic
Page 115 and 116:
Incremental compilation Compiling V
Page 117 and 118:
Library usage Compiling Verilog fil
Page 119 and 120:
Verilog-XL compatible compiler argu
Page 121 and 122:
Compiling Verilog files UM-121 The
Page 123 and 124:
Verilog generate statements Compili
Page 125 and 126:
Naming the optimized design Optimiz
Page 127 and 128:
Optimizing Verilog designs UM-127 I
Page 129 and 130:
Simulating Verilog designs Simulato
Page 131 and 132:
`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
Page 141 and 142:
Example Simulating with an elaborat
Page 143 and 144:
Controlling checkpoint file compres
Page 145 and 146:
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
Page 151 and 152:
System tasks and functions UM-151 T
Page 153 and 154:
Compiler directives Compiler direct
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ModelSim compiler directives The fo
Page 157 and 158:
Determining which memories were imp
Page 159 and 160:
6 - SystemC simulation Chapter cont
Page 161 and 162:
Supported platforms and compiler ve
Page 163 and 164:
Usage flow for SystemC-only designs
Page 165 and 166:
Code modification examples Compilin
Page 167 and 168:
Example 3 Compiling SystemC files U
Page 169 and 170:
Restrictions on compiling with HP a
Page 171 and 172:
Issues with C++ templates Templatiz
Page 173 and 174:
Simulating SystemC designs Loading
Page 175 and 176:
Initialization and cleanup of Syste
Page 177 and 178:
Waveform compare Debugging the desi
Page 179 and 180:
Debugging the design UM-179 The gdb
Page 181 and 182:
Viewing FIFOs SystemC object and ty
Page 183 and 184:
OSCI 2.1 features supported Differe
Page 185 and 186:
Troubleshooting SystemC errors UM-1
Page 187 and 188:
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
Page 195 and 196:
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
Page 209 and 210:
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
Page 233 and 234:
Virtual Objects (User-defined buses
Page 235 and 236:
Virtual regions Virtual types Virtu
Page 237 and 238:
9 - Waveform analysis Chapter conte
Page 239 and 240:
Introduction Objects you can view W
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Wave window overview UM-241 Here is
Page 243 and 244:
List window overview List window ov
Page 245 and 246:
Measuring time with cursors in the
Page 247 and 248:
Jumping to a signal transition Meas
Page 249 and 250:
Zooming the Wave window display Zoo
Page 251 and 252:
Searching in the Wave and List wind
Page 253 and 254:
Using the Expression Builder for ex
Page 255 and 256:
Formatting the Wave window Setting
Page 257 and 258:
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
Page 265 and 266:
Configuring new line triggering in
Page 267 and 268:
Configuring new line triggering in
Page 269 and 270:
Miscellaneous tasks Examining wavef
Page 271 and 272:
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
Page 279 and 280:
Viewing differences in the Wave win
Page 281 and 282:
Compare icons Waveform Compare UM-2
Page 283 and 284:
Comparing hierarchical and flattene
Page 285 and 286:
10 - Generating stimulus with Wavef
Page 287 and 288:
Getting started You can use Wavefor
Page 289 and 290:
Creating waveforms from patterns Cr
Page 291 and 292:
Editing waveforms GR-291 These comm
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Simulating directly from waveform e
Page 295 and 296:
Driving simulation with the saved s
Page 297 and 298:
Saving the waveform editor commands
Page 299 and 300:
11 - Tracing signals with the Dataf
Page 301 and 302:
Adding objects to the window Adding
Page 303 and 304:
Exploring the connectivity of your
Page 305 and 306:
Zooming and panning Zooming with to
Page 307 and 308:
Tracing the source of an unknown (X
Page 309 and 310:
Finding objects by name in the Data
Page 311 and 312:
Printing on Windows platforms Selec
Page 313 and 314:
Symbol mapping Symbol mapping UM-31
Page 315 and 316:
Configuring window options Configur
Page 317 and 318:
12 - Profiling performance and memo
Page 319 and 320:
Getting started Memory allocation p
Page 321 and 322:
Enabling the statistical sampling p
Page 323 and 324:
Interpreting profiler data Interpre
Page 325 and 326:
The Call Tree view Viewing profiler
Page 327 and 328:
Viewing profile details Viewing pro
Page 329 and 330:
Integration with Source windows Int
Page 331 and 332:
Reporting profiler results Reportin
Page 333 and 334:
13 - Measuring code coverage Chapte
Page 335 and 336:
Supported types ModelSim code cover
Page 337 and 338:
Enabling code coverage Enabling cod
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Enabling code coverage UM-339 Next,
Page 341 and 342:
Viewing coverage data in the Source
Page 343 and 344:
Toggle coverage Enabling Toggle cov
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3 Produce the report with the toggl
Page 347 and 348:
Excluding objects from coverage Exc
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end instance Default filter file Ex
Page 351 and 352:
XML output Reporting coverage data
Page 353 and 354:
Instance report with line details R
Page 355 and 356:
Coverage statistics details Conditi
Page 357 and 358:
Coverage statistics details UM-357
Page 359 and 360:
14 - PSL Assertions Chapter content
Page 361 and 362:
PSL assertion language What are ass
Page 363 and 364:
Using cover directives Using assert
Page 365 and 366:
REF2); signal mem_state : memory_st
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} // Check the write cycle property
Page 369 and 370:
Multi-clocked properties and defaul
Page 371 and 372:
Using endpoints in HDL code Example
Page 373 and 374:
Restrictions Clocking endpoints Usi
Page 375 and 376:
Compiling and simulating assertions
Page 377 and 378:
Enabling/disabling failure and pass
Page 379 and 380:
Setting failure and pass limits Man
Page 381 and 382:
Reporting on assertions Reporting o
Page 383 and 384:
15 - Functional coverage with PSL a
Page 385 and 386:
Compiling and simulating functional
Page 387 and 388:
Weighting coverage directives Confi
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Viewing coverage directives in the
Page 391 and 392:
Reporting functional coverage stati
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Tag Meaning Understanding aggregate
Page 395 and 396:
Saving functional coverage data Sav
Page 397 and 398:
Clearing functional coverage data C
Page 399 and 400:
16 - C Debug Chapter contents Intro
Page 401 and 402:
Supported platforms and gdb version
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Setting breakpoints Setting breakpo
Page 405 and 406:
Stepping in C Debug Stepping in C D
Page 407 and 408:
Identifying all registered function
Page 409 and 410:
Auto find bp versus Auto step mode
Page 411 and 412:
Debugging functions during elaborat
Page 413 and 414:
VPI functions in initialization mod
Page 415 and 416:
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
Page 425 and 426:
signal_force Syntax Returns Argumen
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signal_release Syntax Returns Argum
Page 429 and 430:
$init_signal_driver Call only once
Page 431 and 432:
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
Page 439 and 440:
18 - Standard Delay Format (SDF) Ti
Page 441 and 442:
SDF specification with the GUI Erro
Page 443 and 444:
Resolving errors VHDL VITAL SDF UM-
Page 445 and 446:
Examples Optional arguments can be
Page 447 and 448:
REMOVAL is matched to $removal: SDF
Page 449 and 450:
Optional conditions Timing check po
Page 451 and 452:
Interconnect delays Interconnect de
Page 453 and 454:
Mistaking a component or module nam
Page 455 and 456:
19 - Value Change Dump (VCD) Files
Page 457 and 458:
Checkpoint/restore and writing VCD
Page 459 and 460:
Example 3 — Mixed-HDL design Firs
Page 461 and 462:
ModelSim VCD commands and VCD tasks
Page 463 and 464:
A VCD file from source to output VH
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x) x* x+ x, $end #300 $dumpon 1! 0"
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Capturing port driver data Supporte
Page 469 and 470:
Example VCD output from vcd dumppor
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20 - Tcl and macros (DO files) Chap
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Tcl commands Tcl commands UM-473 Fo
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Tcl command syntax UM-475 7 If a wo
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set command syntax Tcl command synt
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Variable substitution System comman
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ModelSim Tcl time commands Conversi
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Tcl examples This is an example of
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} if {$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
Page 495 and 496:
Breakpoints The Tcl Debugger UM-495
Page 497 and 498:
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
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Page 535 and 536:
Page 537 and 538:
Commonly used INI variables Prefere
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Force command defaults Preference v
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Variable precedence Variable preced
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Special considerations for the now
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C - Error and warning messages Appe
Page 547 and 548:
ModelSim message system UM-547 Ther
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Exit codes The table below describe
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Miscellaneous messages Miscellaneou
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Miscellaneous messages UM-553 model
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VSIM license lost Message text Cons
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Suggested action Multiply defined s
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D - Verilog PLI / VPI / DPI Chapter
Page 561 and 562:
Registering PLI applications Regist
Page 563 and 564:
Registering VPI applications Exampl
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Registering DPI applications Regist
Page 567 and 568:
For Windows only: Run a preliminary
Page 569 and 570:
32-bit Linux platform Compiling and
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gcc compiler gcc -c -I//modeltech/i
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For DPI imports 64-bit IBM RS/6000
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32-bit Linux platform Compiling and
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64-bit Solaris platform Compiling a
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64-bit IBM RS/6000 platform DPI spe
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Loading shared objects with global
Page 583 and 584:
VPI example The following example i
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The PLI callback reason argument Th
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The sizetf callback function The si
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Third party PLI applications Third
Page 591 and 592:
IEEE Std 1364 ACC routines IEEE Std
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IEEE Std 1364 TF routines IEEE Std
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SystemVerilog DPI access routines S
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Verilog-XL compatible routines Veri
Page 599 and 600:
PLI/VPI tracing The purpose of trac
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Debugging PLI/VPI/DPI application c
Page 603 and 604:
E - ModelSim shortcuts Appendix con
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Main and Source window mouse and ke
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Keystrokes - UNIX Keystrokes - Wind
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Wave window mouse and keyboard shor
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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
Page 635 and 636:
COMPLIED WITH THIS AGREEMENT. MENTO
Page 637 and 638:
Graphics shall only use or disclose
Page 639 and 640:
Index CR = Command Reference, UM =
Page 641 and 642:
Stop on quit mode UM-414 C Debug se
Page 643 and 644:
mem search CR-204 modelsim CR-206 n
Page 645 and 646:
ange checking in VHDL CR-316, UM-74
Page 647 and 648:
Add Folder GR-47 C Debug setup GR-9
Page 649 and 650:
F -f CR-360 F8 function key UM-607
Page 651 and 652:
Verilog modules UM-125 VHDL subprog
Page 653 and 654:
Memory window GR-169 GUI changes UM
Page 655 and 656:
optimizing Verilog designs design o
Page 657 and 658:
eaders and drivers UM-303 readers c
Page 659 and 660:
adix specifying for examine CR-163
Page 661 and 662:
system tasks VCD UM-461 Verilog UM-
Page 663 and 664:
U -u CR-365 unbound component GR-53
Page 665 and 666:
library clause UM-64 mixed designs
Page 667 and 668:
text editing UM-605 windows Active
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