ModelSim SE User's Manual - Electrical and Computer Engineering

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UM-270 9 - Waveform analysis Waveform Compare ModelSim SE User’s Manual The ModelSim Waveform Compare feature allows you to compare simulation runs. Differences encountered in the comparison are summarized and listed in the Main window transcript. Differences are also shown in the Wave and List windows, and you can write a list of the differences to a file using the compare info command (CR-106). Note: The Waveform Compare feature is available as an add-on to the LE version. Contact Model Technology sales for more information. The basic steps for running a comparison are as follows: 1 Run one simulation and save the dataset. For more information on saving datasets, see "Saving a simulation to a WLF file" (UM-227). 2 Run a second simulation. 3 Setup and run a comparison. 4 Analyze the differences in the Wave or List window. Mixed-language waveform compare support Mixed-language compares are supported as listed in the following table: C/C++ types bool, char, unsigned char short, unsigned short int, unsigned int long, unsigned long SystemC types sc_bit, sc_bv, sc_logic, sc_lv sc_int, sc_uint sc_bigint, sc_biguint sc_signed, sc_unsigned Verilog types net, reg VHDL types bit, bit_vector, boolean, std_logic, std_logic_vector The number of elements must match for vectors; specific indexes are ignored. Three options for setting up a comparison There are three options for setting up a comparison: Comparison Wizard – A series of dialogs that "walk" you through the process GUI – Use various dialogs to "m anually" configure the comparison Comparison commands – Use a series of compare commands
Comparison Wizard Waveform Compare UM-271 The simplest method for setting up a comparison is using the Wizard. The wizard is a series of dialogs that walks you through the process. To start the Wizard, select Tools > Waveform Compare > Comparison Wizard from either the Wave or Main window. The graphic below shows the first dialog in the Wizard. As you can see from this example, the dialogs include instructions on the left-hand side. Comparison graphic interface You can also set up a comparison via the GUI without using the Wizard. The steps of this process are described further in "Setting up a comparison with the GUI" (UM-271). Comparison commands There are numerous commands that give you complete control over a comparison. These commands can be entered in the Main window transcript or run via a DO file. The commands are detailed in the ModelSim Command Reference, but the following example shows the basic sequence: compare start gold.wlf vsim.wlf compare add /* compare run Setting up a comparison with the GUI To setup a comparison with the GUI, follow these steps: 1 Initiate the comparison by specifying the reference and test datasets. See "Starting a waveform comparison" (UM-272) for details. 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
Page 219 and 220: Example SystemC: instantiating VHDL
Page 221 and 222: ); END ringbuf; ARCHITECTURE RTL OF
Page 223 and 224: vgencomp component declaration vgen
Page 225 and 226: 8 - WLF files (datasets) and virtua
Page 227 and 228: Saving a simulation to a WLF file O
Page 229 and 230: Managing multiple datasets WLF file
Page 231 and 232: 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
Page 241 and 242: 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
Page 259 and 260: Formatting the List window Setting
Page 261 and 262: Saving the window format Saving the
Page 263 and 264: 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: Miscellaneous tasks Examining wavef
Page 273 and 274: Test Dataset Waveform Compare UM-27
Page 275 and 276: Adding regions Waveform Compare UM-
Page 277 and 278: 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
Page 293 and 294: 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
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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
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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
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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
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Debugging PLI/VPI/DPI application c
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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
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Environment variables accessed duri
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Initialization sequence Initializat
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G - Logic Modeling SmartModels Appe
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Creating foreign architectures with
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Vector ports Entity details VHDL Sm
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SmartModel Windows VHDL SmartModel
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Verilog SmartModel interface Verilo
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H - Logic Modeling hardware models
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Creating foreign architectures with
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Vector ports Architecture details V
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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
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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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