ModelSim SE User's Manual - Electrical and Computer Engineering

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UM-26 1 - Introduction Step 3 - Loading the design for simulation ModelSim SE User’s Manual vsim Your design is ready for simulation after it has been compiled and (optionally) optimized with vopt (CR-371). For more information on optimization, see Optimizing Verilog designs (UM-124). You may then invoke vsim (CR-373) with the names of the top-level modules (many designs contain only one top-level module) or the name you assigned to the optimized version of the design. For example, if your top-level modules are "testbench" and "globals", then invoke the simulator as follows: vsim testbench globals After the simulator loads the top-level modules, it iteratively loads the instantiated modules and UDPs in the design hierarchy, linking the design together by connecting the ports and resolving hierarchical references. Using SDF Step 4 - Simulating the design Step 5- Debugging the design You can incorporate actual delay values to the simulation by applying SDF backannotation files to the design. For more information on how SDF is used in the design, see "Specifying SDF files for simulation" (UM-440). Once the design has been successfully loaded, the simulation time is set to zero, and you must enter a run command to begin simulation. For more information, see Verilog simulation (UM-111), VHDL simulation (UM-71), and SystemC simulation (UM-159). The basic simulator commands are: add wave (CR-52) force (CR-180) bp (CR-75) run (CR-252) step (CR-272) next (CR-207) Numerous tools and windows useful in debugging your design are available from the ModelSim GUI. For more information, seeWaveform analysis (UM-237), PSL Assertions (UM-359), andTracing signals with the Dataflow window (UM-299). In addition, several basic simulation commands are available from the command line to assist you in debugging your design: describe (CR-147) drivers (CR-154) examine (CR-162) force (CR-180) log (CR-191) checkpoint (CR-93) restore (CR-248) show (CR-267)
ModelSim modes of operation ModelSim modes of operation UM-27 Many users run ModelSim interactively–pushing buttons and/or pulling down menus in a series of windows in the GUI (graphical user interface). But there are really three modes of ModelSim operation, the characteristics of which are outlined in the following table.: ModelSim use mode Characteristics How ModelSim is invoked GUI interactive; has graphical windows, push-buttons, menus, and a command line in the transcript. Default mode. Command-line interactive command line; no GUI. Batch non-interactive batch script; no windows or interactive command line. Command-line mode The ModelSim User’s Manual focuses primarily on the GUI mode of operation. However, this section provides an introduction to the Command-line and Batch modes. In command-line mode ModelSim executes any startup command specified by the Startup (UM-534) variable in the modelsim.ini file. If vsim (CR-373) is invoked with the -do "command_string" option, a DO file (macro) is called. A DO file executed in this manner will override any startup command in the modelsim.ini file. During simulation a transcript file is created containing any messages to stdout. A transcript file created in command-line mode may be used as a DO file if you invoke the transcript on command (CR-286) after the design loads (see the example below). The transcript on command writes all of the commands you invoke to the transcript file. For example, the following series of commands results in a transcript file that can be used for command input if top is re-simulated (remove the quit -f command from the transcript file if you want to remain in the simulator). vsim -c top library and design loading messages... then execute: transcript on force clk 1 50, 0 100 -repeat 100 run 500 run @5000 quit -f via a desktop icon or from the OS command shell prompt. Example: OS> vsim with -c argument at the OS command prompt. Example: OS> vsim -c at OS command shell prompt using "here document" technique or redirection of standard input. Example: C:\ vsim vfiles.v outfile Rename transcript files that you intend to use as DO files. They will be overwritten the next time you run vsim if you don’t rename them. Also, simulator messages are already commented out, but any messages generated from your design (and subsequently written to the transcript file) will cause the simulator to pause. A transcript file that contains only valid simulator commands will work fine; comment out anything else with a "#". 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 and 24: ModelSim simulation task overview M
Page 25: Basic steps for simulation UM-25 Li
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
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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
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
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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
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
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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
Page 235 and 236:
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
Page 251 and 252:
Searching in the Wave and List wind
Page 253 and 254:
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
Page 269 and 270:
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
Page 299 and 300:
11 - Tracing signals with the Dataf
Page 301 and 302:
Adding objects to the window Adding
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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
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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
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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
Page 361 and 362:
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
Page 379 and 380:
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
Page 401 and 402:
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
Page 411 and 412:
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
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
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Mistaking a component or module nam
Page 455 and 456:
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
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Page 535 and 536:
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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
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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
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Registering VPI applications Exampl
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Registering DPI applications Regist
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For Windows only: Run a preliminary
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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
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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
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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
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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
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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
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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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