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1. Ln 35 Col 0 read only y ModelSim SE Tutorial T 70 Lesson 8 Simulating with the Performance Analyzer Speeding up the simulation ModelSim SE Tutorial The information provided by the Performance Analyzer can be used to speed up the simulation Double click the pathname for store vhd 43 and retrieve vhd 35 and view the source code In both cases the source includes a loop which could have an exit 1 Modify the loops to include exits inside the ZF statements or compile the following files included for that purpose store_exit vhd and retrieve_exit vhd vcom retrieve_exit vhd store_exit vhd MENU Compile gt Compile 2 Compile the top level blocks and configuration files again to account for the lower level changes veom ringrtl vhd testring vhd config_rtl vhd MENU Compile gt Compile 3 Reset the simulation to time zero and restart with the modified files restart f MENU Simulate gt Run gt Restart Speeding up the simulation T 71 4 Run timerun do again and note the difference in run time do timerun do Run time has been cut almost in half by inserting exits in the loops r vi ModelSim SE File Edit view Compile Simulate Tools Window Help Ss BE FH mates ae XI H AXDA Mark at 29498400 ns Primary Channel z test_ringbuf test ringabuf test ring AXDA Mark at 29489200 ns Primary Channel i T tii fl t E H AXDA Mark at 29490200 ns Primary Channel rig aes ea H R
2. Main MENU Compile gt Compile ModelSim SE Tutorial T 86 Lesson 10 Comparing waveforms ModelSim SE Tutorial Load the top design unit PROMPT vsim work top MENU Simulate gt Simulate Add the waves to the Wave window and run the simulation add wave run ar Comparing the simulation runs T 87 Comparing the simulation runs ModelSim includes a Comparison Wizard that walks you through the steps of setting up a waveform comparison You can also do it manually with menu or command line commands 1 Select Tools gt Waveform Compare gt Comparison Wizard from the Wave or Main window Click the browse button and select gold wif as the Reference Dataset Recall that this dataset is from the first simulation run prior to adding the 10 time unit delay Comparison Wizard The first step in creating a comparison is to open the reference Reference Dataset and test datasets wlf files Either dataset can be a saved wilf file or a dataset that is already opened Use the Browse buttons to browse for a saved dataset or click the down Use Current Simulation arrow to select a file from the dataset selection history aold wif gt Browse Test Dataset V Update comparison after each run C Specify Dataset SSAA Browse lt Previous Next gt Cancel Leave the Test Dataset set to Use Current Simulation and then click Next ModelSim SE Tutorial
3. ftop ftopip alk St data ftop pfread fopipAvrite ftop n OBHBDCBHD00 data w StO Sti hey elk St0 addr 00000010 fopic pstb Sti Sti sstrb srdy S1 St0 pr OGSIPOBMDOO gd paddr OMIMIMICI 0 sadder OORRPCBHDOO pdata Sti prdy ModelSim SE Tutorial T 110 Lesson 11 Debugging with the Dataflow window Zooming and panning The Dataflow window offers several tools for zooming and panning the display After reviewing the options below try them out on the cache module design Zooming with toolbar buttons These zoom buttons are available on the toolbar Zoom in 2x zoom in by a factor of two from the current view Zoom out 2x zoom out by a factor of two from current view Zoom Full zoom out to view the entire schematic Zooming with the mouse To zoom with the mouse you can either use the middle mouse button or enter Zoom Mode by selecting View gt Zoom and then use the left mouse button 4 zoom options are possible by clicking and dragging in different directions e Down Right Zoom Area In e Up Right Zoom Out zoom amount is displayed at the mouse cursor Down Left Zoom Selected e Up Left Zoom Full The zoom amount is displayed at the mouse cursor A zoom operation must be more than 10 pixels to activate Panning with the mouse ModelSim SE Tutorial To pan with the mouse you must enter Pan Mode by selecting View gt Pan Now click and drag with the l
4. Edit Source Select counter v and tcounter v use Ctrl click and then choose Compile and then Done gt Note The order in which you compile the two Verilog modules is not important other than the source code dependencies created by compiler directives This may again seem strange to Verilog XL users who understand the possible problems of interface checking between design units or compiler directive inheritance ModelSim defers such checks until the design is loaded So it doesn t matter here if you choose to compile counter v before or after tcounter v Loading the design T 29 Loading the design 1 Load the design by selecting Simulate gt Simulate from the menu a PROMPT vsim test_counter The Simulate dialog appears Click the sign next to work to see the counter and test_counter design units You won t see this dialog box if you invoke vsim with test_counter from the command line Simulate Design wo EER Eb Jia work Library work J counter Module C modeltech example Mi test_counter Module C modeltech example ii ieeepure Library C modeltech ieeepure ii vital2 2b Library C modeltech vital2 2b ii vital2000 Library C modeltech vital2000 Efi ieee Library MODEL_TECH ieee ii modelsim_lib Library MODEL_TECH m ii std Library MODEL_TECH std thi std_developers Library MODEL_TECH st gt Simulate Simulator Resolution
5. i it a r 21 begin 22 increment i val i carry 23 carry val i amp carry 24 end 2s end 26 endfunction 2 28 always posedge clk or posedge reset 23 if reset amp 30 count tpd_ reset _to_count h00 31 else 32 count lt tpd clk to count increment count 33 a Fi To make module counter synthesizeable use the following 4 gt TEED Ecounter v counter E Ln 1 Col 0 read only 2 Select the Restart button to reload the design elements and reset the simulation time to zero Main MENU Simulate gt Run gt Restart PROMPT restar 2 ModelSim SE Tutorial Debugging T 35 Make sure all items in the Restart dialog box are selected then click Restart Restart OF x Keep IV List Format IV Wave Format IV Breakpoints MV Logged Signals IV Virtual Definitions Restart Cancel Select the Run All button to re start the simulation run PROMPT run all Main MENU Simulate gt Run gt Run All When the simulation hits the breakpoint it stops running highlights the line with an arrow in the Source window and issues a Break message in the Main window When a breakpoint is reached typically you will want to know one or more signal values You have several options for checking values e look at the values shown in the Signals window e hover your mouse pointer over the count variable in the Source window and a balloon will pop
6. 2720 2740 2745 2755 2760 2780 2785 23800 2320 are top pstrb lt gt pstrb lO xi cori 1 00001000 00001000 2222222 0 90001000 00001000 oOo000c 0 90001000 00001000 oO0000c 0 o0061000 o00 ooo000c 2222222 OOO8L001l 2222222 1001 00001001 2222222 D01001 00001001 22222zZ2 09001001 00001001 oOoo000c 90001001 00001001 oooooocs Hz difference markers 00001001 00001001 000O00OC Specifying tolerances T 93 Specifying tolerances There may be times you want to allow for leading or trailing tolerances in the test dataset signals You can do this easily by modifying the signal properties of a comparison object in the Wave window 1 Click the Find Next Difference icon until you can see the differences at 2025 ns KEYBOARD Tab El 2 Select compare top prw lt gt prw in the signals list and then right click to open the Signal Properties dialog Select the Compare tab MENU View gt Signal Properties Wave Signal Properties Signal compare top prw lt gt pras View Format Compare Clocked Comparison gt iS Clocks Continuous Comparison Leading Tolerance Trailing Tolerance pai bp es Specify When Expression Builder OK Cancel Apply Recall that we delayed the read cycle in proc v by 10 time units Therefore if we specify a trailing tolerance of 10 ns the differences on the comparison object shoul
7. The Tcl procedure defined within lt tcl filename gt called from the ModelSim prompt and executed by ModelSim The traffic do file is a good example of the source command syntax the file is a macro that runs the traffic light simulation View it with Notepad notepad traffic do To save some typing copy the commands from the PDF version of these instructions and paste them at the ModelSim prompt Paste with the right 2 button mouse or middle 3 button mouse You can also select a ModelSim or VSIM prompt from the Main transcript to paste a previous command to the current command line Make a transcript DO file You can rerun the commands executed during the current session with a DO file created from the Main transcript Make the DO file by saving the transcript with the File gt Transcript gt Save Transcript As menu selection at any time during the exercises Run the DO file to repeat the commands do lt do filename gt Initial setup Initial setup T 123 A Important These steps must be completed before running the Tcl examples Create and change to a new working directory for the Tcl Tk exercises Copy the lesson files in the following directory include all subdirectories and files to your new directory lt install_dir gt modeltech examples tcl_tutorial Make the new directory the current directory then invoke ModelSim for UNIX vsim for Windows from a shortcut or Start gt Run etc modelsim exe
8. You can locate the set_light_state procedure with Edit gt Find from the Notepad menu the procedure is located toward the middle of the file Connect traffic lights to the simulation ModelSim SE Tutorial Using the intersection widget you will add when statements to connect the lights to the real simulation Once the connection is made you will simulate the traffic light controller and watch the lights change We ll use ModelSim when statements to condition the simulation to call our Tcl program when a desired simulation condition happens For our example the desired condition is the state of the lights Whenever the lights in the simulation change states we want to change the color of the lights on the screen 4 Load the VHDL libraries you compiled in preparation for these examples using this command at the ModelSim prompt vsim tb_traffic Be sure you invoke this command before the start of the connect_lights procedure if you don t load the libraries you won t have a design to simulate gt Example 3 Simulate an intersection with traffic lights T 127 Connect the lights to the simulation with this command and procedure source lights tcl connect_lights Try running the simulation now select either run button on the intersection Select Break if you used the Run Forever button Notice how the Source window opens and indicates the next line to be executed If the simulator is not evaluating an executable process wh
9. expiration you agree to cease all use of Software and return it to Mentor Graphics or certify deletion and destruction of Software including all copies to Mentor Graphics reasonable satisfaction 10 EXPORT Software is subject to regulation by local laws and United States government agencies which prohibit export or diversion of certain products information about the products and direct products of the products to certain countries and certain persons You agree that you will not export in any manner any Software or direct product of Software without first obtaining all necessary approval from appropriate local and United States government agencies 11 RESTRICTED RIGHTS NOTICE Software has been developed entirely at private expense and is commercial computer software provided with RESTRICTED RIGHTS Use duplication or disclosure by the U S Government or a U S Government subcontractor is subject to the restrictions set forth in the license agreement under which Software was obtained pursuant to DFARS 227 7202 3 a or as set forth in subparagraphs c 1 and 2 of the Commercial T 135 Computer Software Restricted Rights clause at FAR 52 227 19 as applicable Contractor manufacturer is Mentor Graphics Corporation 8005 Boeckman Road Wilsonville Oregon 97070 7777 USA 12 THIRD PARTY BENEFICIARY For any Software under this Agreement licensed by Mentor Graphics from Microsoft or other licensors Microsoft or the applicable li
10. from a DOS prompt modelsim exe Note If you didn t add ModelSim to your search path during installation you will have to include the full path when you type this command at a DOS prompt Select Proceed to ModelSim if the Welcome dialog appears Before you compile any HDL code you ll need a design library to hold the compilation results To create a new design library make this menu selection in the Main window File gt New gt Library Create a New Library xi Create Make sure Create anew library and a logical mapping to it is selected Type work in the Library Name field and then select OK a map to an existing library This creates a subdirectory named work m Library Name your design library work within the current directory ModelSim saves a special file named _info in the subdirectory PROMPT vlib work vmap work work m Library Physical Name work Cancel Note Do not create a Library directory using UNIX or Windows commands because the _info file will not be created Always use the File menu or the vlib command from either the ModelSim or UNIX DOS prompt Compiling the design Compile the file counter vhd into the new library by selecting Compile gt Compile PROMPT vcom counter vhd This opens the Compile HDL Source Files dialog box You won t see this dialog box if you invoke vcom from the command line Compile HDL So
11. gt Open gt Coverage gt Merge Coverage 5 Run the simulator for 3 milliseconds as before run 3 ms Note that now both testring vhd and control vhd are above 90 and therefore shown in green T 81 ModelSim SE Tutorial T 82 Lesson 9 Simulating with Code Coverage Coverage_summary Fie Coverage Report C modeltech_new win32 vhdlstc C modeltech_new win32 vhdl_stc C modeltech_new win32 vhdlsre C modeltech_ new win32 hdl te aioe nd tingrtl vhd store vhd testring vhd E 6 Click on the control vhd pathname to bring up the Source window You can see from the values in the first column that the line hits from this run have been added to the ones from the last run The number of times the clocked processes have been run has doubled source control vyhd 10 x File Edit View Tools Window TE when Ol gt rxd lt ll amp buffer_rxd amp l zj 73 rxd_active lt l 74 when OO gt rxd lt lll amp buffer _rxd 75 rxd_active lt l 76 when others gt rxd lt XXXX rxd_active lt X 77 end case 78 END PROCESS 79 80 This block creates an N bit counter N 81 Incrementer PROCESS clock 82 BEGIN 83 IF clock event AND clock 1l THEN 84 IF reset O THEN Bs address lt others gt O 86 ELSE address lt address l Ram TR gt dleom fini eemergy ft eee Ln 44 Col 0 read only A 7 Q
12. instrumented code is not required and only minimally impacts simulation performance lt 5 ModelSim SE Tutorial T 76 Lesson 9 Simulating with Code Coverage Running a simulation with Code Coverage ModelSim SE Tutorial All commands are shown as entered on the ModelSim command line For this lesson you ll use the same working directory used for the Simulating with the Performance Analyzer lesson It is not necessary to recreate the work library if you completed the last lesson See Lesson 8 Simulating with the Performance Analyzer T 65 if you need the details on these steps 1 Prior to running the simulation we need to check the which_test txt file that was copied from the modeltech examples profiler directory to ensure it reads false data_switch_test You can edit the file with notepad within ModelSim B Notepad which_test txt File Edit Window false data_switch_test This switch configures the test bench the testring vhd file We ll change it later in the lesson when we merge the coverage results of two simulations Compile the lower level blocks of the design vcom control vhd retrieve_array vhd store_array whd MENU Compile gt Compile Compile the top level block test bench and configuration files veom ringrtl vhd testring vhd config_rtl vhd MENU Compile gt Compile Use the vsim coverage command to load the design configuration with Code Coverage vsim coverage work
13. Add default Load Optimize Cancel The Simulate dialog allows you to select a design unit to load from the specified library You can also select the resolution limit for the simulation The default resolution is 1 ns Select test_counter and click Load to accept these settings Bring up the Signals Source and Wave windows by entering the following command at the VSIM prompt within the Main window view signals source wave Main MENU View gt lt window name gt ModelSim SE Tutorial T 30 Lesson 3 Basic Verilog simulation 3 Now let s add signals to the Wave window with ModelSim s drag and drop feature In the Signals window select Edit gt Select All to select the three signals Drag the signals to either the pathname or the values pane of the Wave window File Edit View Add Tools Window wad clk x ama rst x cae count RRRERRKS waye default a 5 o x File Edit view Insert Format Tools Window s OS BO RRET aAA k sim tes El test_counter clk Ne test_counter rst test_counter count 4 x x RRRRRRRR D ns to 495 ns HDL items can also be copied from one window to another or within the Wave and List windows with the Edit gt Copy and Edit gt Paste menu selections ModelSim SE Tutorial Loading the design T 31 4 You may have noticed when you loaded the design in Step 1 that a new tab appeared in th
14. File menu or the vlib command from either the ModelSim or UNIX DOS prompt In the next step you ll compile the Verilog design The example design consists of two Verilog source files each containing a unique module The file counter v contains a module called counter which implements a simple 8 bit binary up counter The other file tcounter v is a testbench module test_counter used to verify counter Under simulation you will see that these two files are configured hierarchically with a single instance instance name dut of module counter instantiated by the testbench You ll get a chance to look at the structure of this code later For now you need to compile both files into the work design library ModelSim SE Tutorial T 28 Lesson 3 Basic Verilog simulation ModelSim SE Tutorial 5 Compile the counter v and tcounter v files into the work library by selecting Compile gt Compile from the menu PROMPT vlog counter v tcounter v This opens the Compile HDL Source Files dialog box Compile HDL Source Files Library work X Look in a examples gt e aa _Jtcl_tutorial i counter v stimulus vhd __ vidpoker wa counter vhd tcounter v _ vpi vu gates vhd uuJtestadder vhd work unio _utils vhd adder vhd un jedec vhd vn bvadd vhd vu pal16r vhd ee nNOS File name teounter v counter v Files of type HDL Files v vl vhd vho hdl vo Done Default Options
15. Find i Find Next Replace Replace I Case sensitive Search backwards Close 7 Regular expression In the Find field type cache_set and click Find Next The cache_set instantiations are now displayed in the Source window Click Close to dismiss the Find in dialog box Note that cache_set is a VHDL entity instantiated within the Verilog file cache v i source cache v File Edit view Tools Window 19 wire word_size l 0 5 sdata sdata_r pdata paali 20 wire 5 srw srw_r sstrb sstrb 2l 22 reg 2 0 oen wen Ss 23 wire 2 0 hit 24 2s F RERREEREEEEEREEE Cache sets KEREKKERRREEEERE f 26 qas SOl paddr pdata hit 0 oen gt wen 0 27 cache set slipaddr pdata hit l oen l wen l 28 cache set sZ paddr pdata hit 7 oen wen 29 cache set s3 paddr pdata hit oen wen 3 30 31 initial begin 32 verbose 1 st saddrir 0 cata yv z he gt 4 gt BB coche y E gt Ln 26 Col 13 read only a7 ModelSim SE Tutorial T 44 Lesson 4 Mixed VHDL Verilog simulation ModelSim SE Tutorial 6 Go back to the Main window expand the e cache entry by clicking the sign and scroll down and click on the line s0 cache_set only The Source window shows the VHDL code for the cache_set entity source set vhd File Edit view Tools Window Ss 280M E woh 10 ll l2 13 l4 15 16 1 18 19 K een
16. M Simulation Options m m m LI 2 Select the Assertions tab Change the selection for Break on Assertion to Error and click OK This will cause the simulator to stop at the HDL assertion statement 3 Restart the simulation using the following command restart f The f option causes ModelSim to restart without popping up the confirmation dialog 4 Run the simulation again for 1000 ns run 1000 ModelSim SE Tutorial T 50 Lesson 5 Debugging a VHDL design Notice that the arrow in the Source window is pointing to the assertion statement fi source testadder vhd p 108 amp Expected amp to_string vector sum 103 found _error true 110 end if 111 if cout vector cout then 112 assert false 113 report Cout is amp to_char cout 114 amp Expected value is amp to_char vector cout 115 found _error true 116 end if 5 If you look at the Variables window now you can see that i 6 This indicates that the simulation stopped in the sixth iteration of the test pattern s loop 8 test_patterns 00000000 00000001 0 to_char Ux012 LH test vector found_error loop 6 Expand the variable named test_patterns by clicking the You may need to resize the window for a better view 7 Also expand the sixth record in the array test_patterns 6 by clicking the The Variables window should be similar to the one below ModelSim SE Tu
17. T 88 Lesson 10 Comparing waveforms 3 Select Compare All Signals in the second dialog and then click Next Comparison Wizard With the reference and test datasets selected the next step is to select a comparison method Comparison Method Compare All Signals compares all signals in the test dataset against the c signals in the reference dataset Compare Top Level Ports Compare Top Level Ports compares Specify Comparison by Signal the top level ports of the selected datasets Specify Comparison by Region Specify Comparison by Signal opens the structure_browser to allow you to select specific signals for comparison Specify Comparison by Region opens the Add Comparison by Region dialog to allow selection of a specific reference region lt Previous Next gt Cancel 4 In the next three dialogs click Next Compute Differences Now and Finish respectively ModelSim SE Tutorial Viewing and saving the comparison data Viewing and saving the comparison data ModelSim performs the comparison and displays the compared signals in the Wave window waye default a q 15 x File Edit view Insert Format Tools Window oh BAIA EAR B QAQQE BF ELE la He Te i im top clk sim top prvy sim top pstrb faa _ ih oer who sim top prdy aaa 2 es er ees See sim top paddr 00001001 000 j 0000001 yoooogo 000000 sim top pdata ooo00000000 SS S
18. You can remove the comments in the code to make this change as well These control widgets are implemented using the Tk scale widgets enclosed in a frame When the value of the scale widget changes it calls the command specified with the command option on each scale After you have added your North South widgets run your program with this command source controls tcl draw_controls Now you have a complete intersection interface Try the run buttons and the slider scales You can view the simulation with ModelSim s GUI Check the Source window to view the VHDL files and add signals to a Wave window add wave You can also change the run length in the Main window Try using the Run buttons in the Main window and the intersection window Keep the intersection simulation running to complete the next example If you want to recreate the final intersection environment quickly invoke these commands from the ModelSim prompt after Initial setup T 123 cd solutions vmap work work do traffic do Example 4 Draw a state machine that represents the simulation T 129 Example 4 Draw a state machine that represents the simu lation In this final example you will draw a state machine representing the simulation and connect it to the state signal inside the traffic light controller Each transition that the controller makes is displayed as it happens The intersection environment from the previous example needs to b
19. asp Customers in Europe should contact their distributor for support See www model com contact_us asp for distributor contact information Updates www model com products release asp Latest version email Place your name on our list for email notification of news and updates www model com support register_news_list asp ModelSim SE Tutorial Before you begin T 9 Before you begin Preparation for some of the lessons leaves certain details up to you You will decide the best way to create directories copy files and execute programs within your operating system When you are operating the simulator within ModelSim s GUI the interface is consistent for all platforms Additional details for VHDL Verilog and mixed VHDL Verilog simulation can be found in the ModelSim User s Manual and Command Reference See Where to find our documentation T 7 Examples show Windows path separators use separators appropriate for your operating system when trying the examples Command button and menu equivalents Drag and drop Many of the lesson steps are accomplished by a button or menu selection When appropriate VSIM command line PROMPT or menu MENU equivalents for these selections are shown in parentheses within the step This example shows three options to the run all command a button prompt command and a menu selection PROMPT run all MENU Simulate gt Run gt Run All Drag and drop allows
20. break connect _lights procedure to indicate created with the canvas c mmand connection to the simulator widget ModelSim SE Tutorial Tk widgets The custom traffic light interface T 121 The intersection illustration points out several Tcl Tk widgets A widget is simply a user interface element like a menu or scrolled list Tk widgets are referenced within Tcl procedures to create graphic interface objects The Tk tool box comes with several widgets additional widgets can be created using these as a base Controlling the simulation The components of the intersection interface have the following effect within ModelSim Intersection control used Effect in ModelSim Run 1000 button invokes the run command for 1000 ns Run Forever button invokes the run all command Break button invokes the break command light timing control invokes the force command with the arguments for the indicated signal and time arrival time control invokes the force command with the arguments for the indicated direction and time waiting queue Saving time any time you change a control the examine command is invoked to display the value of the waiting queue Since several intersection controls invoke a command and arguments with a single action such as the movement of a slider this custom interface saves time compared to invoking the commands from the command line or ModelSim menus Copies of the
21. design ModelSim versions 5 6 and later include enhanced Dataflow functionality that expands your debugging options ModelSim SE Tutorial T 96 Lesson 11 Debugging with the Dataflow window Compiling and loading the design ModelSim SE Tutorial We ll start by compiling and loading a mixed design that we ll use for subsequent examples 1 Create a new working directory make it the current directory and then copy the files from nodeltech examples mixedHDL into it 2 Use the vlib command to create a work library in the current directory vlib work MENU File gt New gt Library 3 Use the vmap command to map the work library to a physical directory A modelsim ini file will be written into the work directory vmap work work 4 Compile the Verilog files vlog cache v memory v proc v MENU Compile gt Compile 5 Compile the VHDL files vcom util vhd set vhd top vhd MENU Compile gt Compile 6 Load the top level of the design vsim top a MENU Simulate gt Simulate 7 Log all signals in the design so we have all information for debugging log r 8 Run the design for 500 ns run 500 ns Exploring connectivity T 97 Exploring connectivity A primary use of the Dataflow window is exploring the physical connectivity of your design You do this by expanding the view from process to process This allows you to see the drivers receivers of a particular signal net or register 1 Select p proc in the sim tab of
22. icy fa new library and Aeneeeenennenneneeeneeenenneeeneeneneeneeeareenaeeen Libtaty Name fold arid ia new library ar then select OK a map to an existing library This creates a subdirectory named work m Library Name your design library work within the current directory ModelSim saves a special file named _info in the subdirectory PROMPT vlib work vmap work work m Library Physical Name work Cancel Note Do not create a Library directory using UNIX or Windows commands because the _info file will not be created Always use the File menu or the vlib command from either the ModelSim or UNIX DOS prompt Compile the design T 39 4 Compile the HDL files by selecting Compile gt Compile from the menu PROMPT vlog cache v memory v proc v PROMPT vcom util vhd set vhd top vhd This opens the Compile HDL Source Files dialog box Compile HDL Source Files Library work v Look in SY mixedHDL 0 eX EE Y ache util vhd File name cache v memor v proc v Files of type HDL Files v vl vhd vho hdl vo Done Default Options Edit Source A group of Verilog files may be compiled in any order However in a mixed VHDL Verilog design the Verilog files must be compiled before the VHDL files Compile the Verilog source by double clicking each of these Verilog files in the file list this invokes the Verilog compiler vl
23. interprets this force command as follows e force clk to the value 1 at 50 ns after the current time e then to 0 at 100 ns after the current time e repeat this cycle every 100 ns Now you will exercise two different Run functions from the toolbar buttons on either the Main or Wave window The Run functions are identical in the Main and Wave windows Select the Run button first When the run is complete select Run All Run This causes the simulation to run and then stop after 100 ns PROMPT run 100 Main MENU Simulate gt Run gt Run 100ns Run All This causes the simulator to run forever To stop the run go on to the next step PROMPT run all Main MENU Simulate gt Run gt Run All Select the Break button on either the Main or Wave toolbar to interrupt the run The simulator will stop running as soon as it gets to an acceptable stopping point Main MENU Simulate gt Break The arrow in the Source window points to the next HDL statement to be executed If the simulator is not evaluating a process at the time the Break occurs no arrow will be displayed in the Source window Running the simulation T 23 4 Next you will set a breakpoint in the function on line 18 Scroll the Source window until line 18 is visible Click on or near line number 18 to set the breakpoint You should see a red dot next to the line number where the breakpoint is set The breakpoint can be toggled between enabled and disabled by c
24. original example files Copies of the Tcl example files from these exercises are located in the lt install_dir gt nodeltech examples tcl_tutorialoriginals directory Solutions to the examples Throughout the traffic intersection examples you will be modifying Tcl files to complete the final intersection You will find a completed set of intersection examples ready to run in the tcl_tutorial solutions directory Invoke these commands from the ModelSim prompt to run the intersection cd solutions do traffic do ModelSim SE Tutorial T 122 Lesson 14 Tcl Tk and ModelSim Viewing files If you would like to view the source for any of the Tcl files in our examples use the notepad command at either the ModelSim or VSIM prompt notepad lt filename gt Most files are opened in read only mode by default you can edit the file by deselecting read only from the notepad Edit menu The Tcl source command Shortcuts ModelSim SE Tutorial The Tcl source command reads the Tcl file into the Tcl interpreter which parses the procedures for use within the current environment Once sourced a Tcl procedure can be called from the ModelSim prompt as shown in the syntax below ModelSim executes the instructions within the procedure Syntax source lt tcl filename gt lt tcl procedure name gt Arguments lt tcl filename gt The Tcl file read into the ModelSim Tcl interpreter with the source command lt tcl procedure name gt
25. reconstruct the current windows Now that you have the windows open put the signals in them add wave add list Use the available windows to experiment with the saved simulation results and quit when you are ready quit f For additional information on the batch and command line modes please refer to the ModelSim User s Manual ModelSim SE Tutorial T 114 ModelSim SE Tutorial T 115 Lesson 13 Executing commands at load time The goals for this lesson are Specify the design unit to be simulated on the command line Edit the modelsim ini file Execute commands at load time with a DO file ModelSim SE Tutorial T 116 Lesson 13 Executing commands at load time ModelSim SE Tutorial A Important Start this lesson from either the UNIX or DOS prompt in the same directory in which you completed Chapter Lesson 12 Running a batch mode simulation For this lesson you will use a macro DO file that executes whenever you load a design For convenience a startup file has been provided with the ModelSim program You need to copy this DO file from the installation directory to your current directory lt install_dir gt modeltech examples startup do Next you will edit the modelsim ini file in the modeltech directory or the modelsim ini file in your current directory if one exists to point at this file To do this open lt install_dir gt modeltech modelsim ini using a text editor and uncomment the fol
26. you to copy and move signals among windows If drag and drop applies to a lesson step it is noted in a fashion similar to MENUS and PROMPTS with DRAG amp DROP Command history As you work on the lessons keep an eye on the Main transcript window The commands invoked by buttons and menu selections are echoed there You can scroll through the command history with the up and down arrow keys or the command history may be reviewed with several shortcuts at the ModelSim VSIM prompt Shortcut Description click on prompt left click once on a previous ModelSim or VSIM prompt in the transcript to copy the command typed at that prompt to the active cursor his or history shows the last few commands up to 50 are kept ModelSim SE Tutorial T 10 Introduction Reusing commands from the Main transcript ModelSim SE Tutorial ModelSim s Main transcript can be saved and the resulting file used as a DO macro file to replay the transcribed commands You can save the transcript at any time before or during simulation You have the option of clearing the transcript File gt Transcript gt Clear Transcript if you don t want to save the entire command history To save the contents of the transcript select File gt Transcript gt Save Transcript As from the Main menu Replay the saved transcript with the do command do lt do file name gt For example if you saved a series of compiler commands as mycompile do the do
27. 65 Lesson 9 Simulating with Code Coverage 0 0 0 00 T 75 Lesson 10 Comparing waveforms 000 cee eee eee eee T 83 Lesson 11 Debugging with the Dataflow window T 95 Lesson 12 Running a batch mode simulation T 111 Lesson 13 Executing commands at loadtime T 115 Lesson 14 Tcl Tk and ModelSim 002 ee eee T 117 License Agreement nts ee ee seh nr eee beer ee Geer eee cass eeeds T 131 i ee ee eS ee ee ee ee eee ee ee eee T 137 T 3 ModelSim SE Tutorial T 4 ModelSim SE Tutorial Introduction T 5 Chapter contents Software versions ModelSim s graphic interface Standards supported Assumptions Where to find our documentation Technical support and updates Before you begin T 6 T 6 T 6 T 7 T 7 T 8 T 9 ModelSim SE Tutorial T 6 Introduction Software versions This documentation was written to support ModelSim SE 5 6d for UNIX and Microsoft Windows 98 Me NT 2000 XP If the ModelSim software you are using is a later release check the README file that accompanied the software Any supplemental information will be there Although this document covers both VHDL and Verilog simulation you will find it a useful reference even if your design work is limited to a single HDL ModelSim s graphic interface While your operating system interface provides the window management frame ModelSim con
28. At the ModelSim prompt create a work library in the vhd directory vlib vhdl work Map the work library vmap work vhdl work Compile the VHDL example files with these commands or the Compile dialog box veom vhdl traffic vhd vcom vhdl queue vhd vcom vhdl tb_traffic vhd ModelSim SE Tutorial T 124 Lesson 14 Tcl Tk and ModelSim Example 1 Create a Hello World button widget ModelSim SE Tutorial Before you begin the examples make sure you have completed Initial setup T 123 In this example you will study a hello world button that prints a message when pressed 1 Source the Tcl file from the ModelSim prompt source hello tcl then run the procedure defined within hello tcl hello_example The file hello tcl was read into the ModelSim Tcl interpreter The instructions in the hello_example procedure were then executed by ModelSim and Hello World was printed to the Main transcript or invoking shell on UNIX Selecting the button will print the message again You ve just created your first top level widget Invoke the hello_example procedure again and notice how the new button replaces the original button The procedure destroyed the first button and created the new one Get a closer look at the source Tcl file with the notepad notepad hello tcl Close the hello_example window when you re done Example 2 Execute a procedure using a push button T 125 Example 2 Execute a procedure using
29. F HTML select Main window gt Help gt SE Documentation also available from the Support page of our web site www model com ModelSim SE User s Manual PDF HTML select Main window gt Help gt SE Documentation ModelSim SE Command Reference PDF HTML select Main window gt Help gt SE Documentation ModelSim Foreign Language Interface Reference PDF HTML select Main window gt Help gt SE Documentation Std_DevelopersKit User s Manual www model com support pdf sdk_um pdf The Standard Developer s Kit is for use with Mentor Graphics QuickHDL ModelSim Command Help type help command name at the prompt in the Main window Error message help type verror lt msgNum gt at the prompt in the Main window or at a shell prompt Tcl Man Pages Tcl manual select Main window gt Help gt Tcl Man Pages or find contents htm in modeltech docs tcl_help_html ModelSim SE Tutorial Document Format How to get it application notes HTML www model com resources techdocs asp frequently asked questions HTML www model com resources faqs asp tech notes ASCII select Main window gt Help gt Technotes or located in the modeltech docs technotes directory Technical support and updates The Model Technology web site includes links to support software updates and many other information sources Support www model com support default
30. Foundation Inc in the USA and other countries SPARC is a registered trademark and SPARCstation is a trademark of SPARC International Inc Sun Microsystems is a registered trademark and Sun SunOS and OpenWindows are trademarks of Sun Microsystems Inc All other trademarks and registered trademarks are the properties of their respective holders Copyright c 1990 2002 Model Technology Incorporated All rights reserved Confidential Online documentation may be printed by licensed customers of Model Technology Incorporated for internal business purposes only Model Technology Incorporated 10450 SW Nimbus Avenue Bldg R B Portland OR 97223 4347 USA phone 503 641 1340 fax 503 526 5410 e mail support model com sales model com home page http www model com support page http Awww model com support Table of Contents Pi oo eo eee aes tennen na eee pee eee ee esse eee T 5 Lesson 1 Creating a Project 26 eee oboe ses bG ee ae wE SER wee vas T 11 Lesson 2 Basic VHDL simulation 22000055 T 17 Lesson 3 Basic Verilog simulation 0 6 ce esi dee eee eee ee os T 25 Lesson 4 Mixed VHDL Verilog simulation 2 I 37 Lesson 5 Debugging a VHDL design T 45 Lesson 6 Finding names and values 2220 T 53 Lesson 7 Using the Wave window 0000000 es T 57 Lesson 8 Simulating with the Performance Analyzer T
31. L this will be a new idea for you Since ModelSim is a compiled Verilog simulator it requires a target design library for the compilation ModelSim can compile both VHDL and Verilog code into the same library if desired Invoke ModelSim for UNIX at the shell prompt vsim for Windows your option from a Windows shortcut icon from the Start menu or from a DOS prompt modelsim exe Note If you didn t add ModelSim to your search path during installation you will have to include the full path when you type this command at a DOS prompt Click Close if the Welcome dialog appears Compiling the design T 27 Before you compile any HDL code you ll need a design library to hold the compilation results To create a new design library make this menu selection in the Main window File gt New gt Library Make sure Create anew n s appara 4 mapping toit is selected Create Type work in the premens AE a Library Name field and ResesecsesceososcoeoscossoodVossosoo then select OK C amap to an existing library This creates a subdirectory named work m Library Name your design library work within the current directory ModelSim m Library Physical Name saves a special file named _info in the subdirectory PROMPT vlib work vmap work work work Note Do not create a Library directory using UNIX or Windows commands because the _info file will not be created Always use the
32. MENTOR GRAPHICS NOR ITS LICENSORS SHALL BE LIABLE FOR ANY DAMAGES RESULTING FROM OR IN CONNECTION WITH THE USE OF SOFTWARE IN ANY APPLICATION WHERE THE FAILURE OR INACCURACY OF THE SOFTWARE MIGHT RESULT IN DEATH OR PERSONAL INJURY YOU AGREE TO INDEMNIFY AND HOLD HARMLESS MENTOR GRAPHICS AND ITS LICENSORS FROM ANY CLAIMS LOSS COST DAMAGE EXPENSE OR LIABILITY INCLUDING ATTORNEYS FEES ARISING OUT OF OR IN CONNECTION WITH SUCH USE 8 INFRINGEMENT 8 1 Mentor Graphics will defend or settle at its option and expense any action brought against you alleging that Software infringes a patent or copyright in the United States Canada Japan Switzerland Norway Israel Egypt or the T 133 ModelSim SE Tutorial T 134 License Agreement ModelSim SE Tutorial European Union Mentor Graphics will pay any costs and damages finally awarded against you that are attributable to the claim provided that you a notify Mentor Graphics promptly in writing of the action b provide Mentor Graphics all reasonable information and assistance to settle or defend the claim and c grant Mentor Graphics sole authority and control of the defense or settlement of the claim 8 2 If an infringement claim is made Mentor Graphics may at its option and expense either a replace or modify Software so that it becomes noninfringing or b procure for you the right to continue using Software If Mentor Graphics determines that neither of those alternative
33. Model Sim SE Tutorial Version 5 6d Published 6 Aug 02 The world s most popular HDL simulator T 2 ModelSim SE Tutorial ModelSim VHDL ModelSim VLOG ModelSim LNL and ModelSim PLUS are produced by Model Technology Incorporated Unauthorized copying duplication or other reproduction is prohibited without the written consent of Model Technology The information in this manual is subject to change without notice and does not represent a commitment on the part of Model Technology The program described in this manual is furnished under a license agreement and may not be used or copied except in accordance with the terms of the agreement The online documentation provided with this product may be printed by the end user The number of copies that may be printed is limited to the number of licenses purchased ModelSim is a registered trademark and ChaseX and TraceX are trademarks of Model Technology Incorporated Model Technology is a trademark of Mentor Graphics Corporation PostScript is a registered trademark of Adobe Systems Incorporated UNIX is a registered trademark of AT amp T in the USA and other countries FLEXIm is a trademark of Globetrotter Software Inc IBM AT and PC are registered trademarks AIX and RISC System 6000 are trademarks of International Business Machines Corporation Windows Microsoft and MS DOS are registered trademarks of Microsoft Corporation OSF Motif is a trademark of the Open Software
34. Structure window View the HDL source code in the Source window Note You must be using ModelSim SE PLUS or ModelSim SE MIXED to do this lesson ModelSim SE Tutorial T 38 Lesson 4 Mixed VHDL Verilog simulation Compile the design ModelSim SE Tutorial 1 Start by creating a new directory for this exercise Create the directory then copy the VHDL and Verilog example files to the directory lt install_dir gt modeltech examples mixedHDL vhd lt install_dir gt modeltech examples mixedHDL v Make sure the new directory is the current directory Do this by invoking ModelSim from the new directory or by using the File gt Change Directory command from the ModelSim Main window Start ModelSim with one of the following for UNIX at the shell prompt vsim for Windows your option from a Windows shortcut icon from the Start menu or from a DOS prompt modelsim exe Note If you didn t add ModelSim to your search path during installation you will have to include the full path when you type this command at a DOS prompt Select Proceed to ModelSim if the Welcome dialog appears Before you compile any HDL code you ll need a design library to hold the compilation results To create a new design library make this menu selection in the Main window File gt New gt Library Create a New Library a xi Create Make sure Create a new library and a logical mapping toit is selected Type work in the
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36. XDA Mark at 29490600 ns Primary Channel E Package textio AXDA Mark at 29491400 ns Primary Channel IM Package std_logic_unsigned Profiling paused 758 samples taken 90 in user cod K e E Package std_logic_arith 1008110130 E Package std_logic_1164 8 E Package standard Now 30 ms Delta 4 sim test_ringbuf 2 5 Take another look at the Performance Analyzer data view_profile MENU Tools gt Profile gt View hierarchical profile A lot of time is still being spent in the loops To further reduce simulation time these loops can be replaced by indexing an array Hierarchical Profile fe Samples 655 dA sil re eben SSS SSS SSSI isi tT ere CJMODELTECH EXAMPLESIprofilerretrieve_exitvhd 35 44 43 CJMODELTECH EXAMPLESiprofiler store_exitvhd 43 as 33 CJMODELTECH EXAMPLES profilericontrol vhd 87 2 2 CJMODELTECH EXAMPLE Siprofilerretrieve_exitvhd 39 2 2 CJMODELTECH EXAMPLE Siprofiler store_exitvhd 47 2 2 CMODELTECH EXAMPLES profiler control vhd 98 1 1 CJMODELTECHIEXAMPLESprofilericontrol vhd 11 4 1 1 ModelSim SE Tutorial T 72 Lesson 8 Simulating with the Performance Analyzer 6 Remove the loops and add an array or compile the following files which already contain the modifications vcom retrieve_array vhd store_array vhd MENU Compile gt Compile 7 Compile the top level blocks and configuration files again vcom ringrtl vhd testring vhd config_rtl vhd MENU Compile gt Compile 8 Re
37. a new directory for this exercise and copy the following VHDL vhd files from lt install_dir gt modeltech examples to the new directory e gates vhd e adder vhd e testadder vhd Make sure the new directory is the current directory Do this by invoking ModelSim from the new directory or by using the File gt Change Directory command from the ModelSim Main window Start ModelSim with one of the following for UNIX at the shell prompt vsim for Windows your option from a Windows shortcut icon from the Start menu or from a DOS prompt modelsim exe Note If you didn t add ModelSim to your search path during installation you will have to include the full path when you type this command at a DOS prompt Enter the following command at the ModelSim prompt in the Main window to create a new library vlib library_2 Map the new library to the work library using the vmap command vmap work library_2 ModelSim adds this mapping to the modelsim ini file Compile the source files into the new library by entering this command at the ModelSim prompt vcom work library_2 gates vhd adder vhd testadder whd Compiling and loading the design T 47 7 Open the Simulate dialog by selecting Simulate gt Simulate Expand the work library and increase the width of the name column by clicking and dragging on the border between the Name and Type columns 8 Make sure Simulator Resolution is set to nanoseconds selec
38. a push button Before you begin this example make sure you have completed Initial setup T 123 This example will display all of the gif images in the images directory Each button has a binding attached to it for enter events and a binding for a mouse button press When the mouse enters the button graphic the image file name is printed to the Main window or invoking shell on UNIX When the mouse button is pushed its widget name will be printed to the Main window or invoking shell on UNIX 1 Build an image viewer by invoking this command and calling this procedure source images tcl image_example 2 Drag the mouse across the buttons and notice what happens in the Main transcript or invoking shell on UNIX Push one of the buttons you will see an error dialog box You can solve this problem by modifying the images tcl file 3 To view the source file press the See Source Code button at the bottom of the image display or invoke notepad at the ModelSim prompt notepad images tcl You ll find that the pushme procedure is missing it s commented out in images tcl 4 Search for proc push using the Edit gt Find menu selection in the notepad Remove the comments the symbols to return the function to your source use File gt Save to save the changes then close the image window with the Destroy button 5 Once the pushme procedure is in place it will print its one parameter the object name to the transcript A
39. am provided that you distribute these files only in conjunction with your compiled computer program Mentor Graphics does NOT grant you any right to duplicate or incorporate copies of Mentor Graphics real time operating systems or other ESD Software except those explicitly granted in this section into your products without first signing a separate agreement with Mentor Graphics for such purpose ModelSim SE Tutorial T 132 License Agreement ModelSim SE Tutorial 3 BETA CODE 3 1 Portions or all of certain Software may contain code for experimental testing and evaluation Beta Code which may not be used without Mentor Graphics explicit authorization Upon Mentor Graphics authorization Mentor Graphics grants to you a temporary nontransferable nonexclusive license for experimental use to test and evaluate the Beta Code without charge for a limited period of time specified by Mentor Graphics This grant and your use of the Beta Code shall not be construed as marketing or offering to sell a license to the Beta Code which Mentor Graphics may choose not to release commercially in any form 3 2 If Mentor Graphics authorizes you to use the Beta Code you agree to evaluate and test the Beta Code under normal conditions as directed by Mentor Graphics You will contact Mentor Graphics periodically during your use of the Beta Code to discuss any malfunctions or suggested improvements Upon completion of your evaluation and testing
40. ay widget consists of an enclosing frame with two label widgets The first label is a simple text string The second label is the value of the queue length The text in the second label will be updated whenever the queue lengths change ModelSim SE Tutorial T 128 Lesson 14 Tcl Tk and ModelSim After you have added your North South widget run your program by invoking this command source queues tcl draw_queues According to the traffic indicators the cars are leaving the intersection at the same rate That seems fair but if you are designing an intersection that responds to the traffic flow into the intersection you might want to change the light cycles Perhaps one of the directions has more incoming traffic than the other Adding controls in the form of scale widgets allows you to quickly change the assumptions about traffic flow into the intersection Add scale widgets to control the simulation ModelSim SE Tutorial Next you will add Tk scale widgets that will control the arrival rates and the length of the lights 10 The East West widget for controlling the East West queue inter arrival time is 11 provided You ll edit the source code to add controls for the North South direction Use this command notepad controls tcl You can remove the comments in the code to make this change Similarly add the North South widget for controlling the length of the lights The East West widget for light control is provided
41. censor is a third party beneficiary of this Agreement with the right to enforce the obligations set forth in this Agreement 13 CONTROLLING LAW This Agreement shall be governed by and construed under the laws of Ireland if the Software is licensed for use in Israel Egypt Switzerland Norway South Africa or the European Union the laws of Japan if the Software is licensed for use in Japan the laws of Singapore if the Software is licensed for use in Singapore People s Republic of China Republic of China India or Korea and the laws of the state of Oregon if the Software is licensed for use inthe United States of America Canada Mexico South America or anywhere else worldwide not provided for in this section 14 SEVERABILITY If any provision of this Agreement is held by a court of competent jurisdiction to be void invalid unenforceable or illegal such provision shall be severed from this Agreement and the remaining provisions will remain in full force and effect 15 MISCELLANEOUS This Agreement contains the entire understanding between the parties relating to its subject matter and supersedes all prior or contemporaneous agreements including but not limited to any purchase order terms and conditions except valid license agreements related to the subject matter of this Agreement which are physically signed by you and an authorized agent of Mentor Graphics This Agreement may only be modified by a physically signed writing between
42. cl command is used to time the simulation do timerun do Notice as the simulation runs that the status bar shows how many profile samples are being taken fw Modelsim SE File Edit view Compile Simulate Tools Window Help eo S68 fff melas oe Xi H AXDA Mark at 29488400 ns Primary Channel ora test_ringbuf test_ring AXDA Mark at 29489200 ns Primary Channel fing imt ingui AXDA Mark at 29490200 ns Primary Channel ginst Fingoultt H RXDA Mark at 29490600 ns Primary Channel WM Package textio AXDA Mark at 29491400 ns Primary Channel J Package std_logic_unsigned Profiling paused 1369 samples taken 93 in user co J Package std_logic_arith ri 008109880 E Package std_logic_1164 14 J Package standard 0 Total Run Time O Minutes 14 Seconds SIM 55 gt 5 Now 30 ms Delta 4 sim test_ringbuf 2 Make a note of the run time reported in the Transcript window We ll use it later to compare how much we ve increased simulation speed Your times may differ from those shown here due to differing system configurations ModelSim SE Tutorial T 68 Lesson 8 Simulating with the Performance Analyzer 3 Display the Hierarchical Profile output view_profile MENU Tools gt Profile gt View hierarchical profile Note that two lines retrieve vhd 35 and store vhd 43 are taking the majority of the simulation time You can use the PrefProfile hierCutoff Tcl control variable to
43. d Notepad works well to check text files such as this notepad cover dat Excluding lines and files T 79 Excluding lines and files There may be a time when you want to exclude certain parts of your code from the analysis You can exclude both lines and files from either the source or the coverage_summary windows 1 Scroll to one of the executable lines in the Source window noted with a blue line number 2 With your mouse pointer over the column that shows coverage results the left most column click your right mouse button and select Exclude Coverage Line 3 The line will now be marked with a green X and the coverage statistics will be updated to exclude that line 4 View the coverage_summary window and click the Excluded tab This tab shows all the lines and files that are currently being excluded Coverage_summary File Coverage Report Lines _Hits C modeltech win32 vhdl_stc ieee 228 0 C modeltech win32 vhdl_stc std tg 507 0 C modeltech win32 vhdl_stc synog 502 0 C modeltech win32 vhdl_stc synop 50 0 control vhd 46 37 retrieve_array vhd 3 3 tingrtl vhd 1 1 store_array vhd 7 7 testring vhd 83 60 4 gt 1427 108 Files and Lines with Exclusion Filtering Pa Misses Excluded ModelSim SE Tutorial T 80 Lesson 9 Simulating with Code Coverage 5 Select the line in the Excluded tab click your right mouse button and select Include Entire Sel
44. d disappear 3 Specify 10 ns for the Trailing Tolerance and then click OK 4 Rerun the comparison MENU Tools gt Waveform Compare gt Run Comparison ModelSim SE Tutorial T 94 Lesson 10 Comparing waveforms 5 Notice that the difference markers have disappeared for the top prw comparison object wave default E E Fie Edit view Insert Format Tools Window SUS BR RAEI Gi QQek E la fle Te i 10 x sim top clk sim top prw sim top pstrb sim top prdy sim top paddr 00001001 sim top pdata S S Pp im top srw 0 im top sstrb 1 im top srdy 1 im top saddr 00001001 00000177 100001000 YOOOOTooT im top sdata fc es compare top clk lt gt clk match match compare top pstrb lt gt pstrb diff compare top prdy lt gt prdy match compare top paddr lt gt pad diff aa 3620 ns 2025 ns EREE TT FEE 1525 ns to 2307 ns amp 6 Quit the simulator quit f ModelSim SE Tutorial T 95 Lesson 11 Debugging with the Dataflow window The goals for this lesson are Log signals so you have information necessary for debugging Explore the connectivity of your design Trace an event Trace an X unknown value Jump to the source of an unknown View hierarchy in the Dataflow window Zoom and pan the Dataflow window The Dataflow window allows you trace VHDL signals or Verilog nets and registers through your
45. e Performance Analyzer Compiling and loading the design ModelSim SE Tutorial This lesson will use an example design that contains lower level VHDL blocks in the files control vhd retrieve vhd and store vhd and top level block test bench and configuration files ringrtl vhd testring vhd and config_rtl vhd 1 Start by creating a new working directory making it the current directory and copying the files from nodeltech examples profiler into it Use the vlib command to create a work library in the current directory vlib work MENU File gt New gt Library Use the vmap command to map the work library to a physical directory A modelsim ini file will be written into the current directory vmap work work Compile the lower level blocks of the design vcom control vhd retrieve vhd store vhd MENU Compile gt Compile Compile the top level block test bench and configuration files veom ringrtl vhd testring vhd config_rtl vhd MENU Compile gt Compile Use the vsim command to load the design configuration vsim work test_bench_rtl a MENU Simulate gt Simulate Running the simulation T 67 Running the simulation 1 Turn on profiling prior to running the simulation profile on MENU Tools gt Profile gt Profile On 2 We re going to run the simulation using a DO file that reports how long the simulation takes to run Take a look at the commands in the timerun do file The seconds T
46. e does not disclose it or use it except as permitted by this Agreement Except as otherwise permitted for purposes of interoperability as specified by the European Union Software Directive or local law you shall not reverse assemble reverse compile reverse engineer or in any way derive from Software any source code You may not sublicense assign or otherwise transfer Software this Agreement or the rights under it without Mentor Graphics prior written consent The provisions of this section shall survive the termination or expiration of this Agreement 5 LIMITED WARRANTY 5 1 Mentor Graphics warrants that during the warranty period Software when properly installed will substantially conform to the functional specifications set forth in the applicable user manual Mentor Graphics does not warrant that Software will meet your requirements or that operation of Software will be uninterrupted or error free The warranty period is 90 days starting on the 15th day after delivery or upon installation whichever first occurs You must notify Mentor Graphics in writing of any nonconformity within the warranty period This warranty shall not be valid if Software has been subject to misuse unauthorized modification or installation MENTOR GRAPHICS ENTIRE LIABILITY AND YOUR EXCLUSIVE REMEDY SHALL BE AT MENTOR GRAPHICS OPTION EITHER A REFUND OF THE PRICE PAID UPON RETURN OF SOFTWARE TO MENTOR GRAPHICS OR B MODIFICATION OR REPLACEMENT OF SOFT
47. e o Ee w SE CEE SEW Ln 20 Col 0 read only de generici addr size integer set_size integer word size integer i Me porti addr in data inout hit gt out oen in wen z in l end cache_set std_logic_vector addr_size l std_ logic vector word size std_logic std_logic std_logic architecture only of cache_set is cemctont cira intorar Pttcat cira Before you quit try experimenting with some of the commands you ve learned from previous lessons add signals to the Wave window run the simulation etc Note that in this design clk is already driven so you won t need to use the force command 7 When you re ready to quit simulating enter the command quit force T 45 Lesson 5 Debugging a VHDL design The goals for this lesson are Map a logical library name to an actual library Change the default run length Recognize assertion messages in the Main window transcript Change the assertion break level Restart the simulation run using the restart command Examine composite types displayed in the Variables window Change the value of a variable In this lesson we will debug an assertion message using the Source Signals and Variables windows For another debugging lesson see Lesson 11 Debugging with the Dataflow window ModelSim SE Tutorial T 46 Lesson 5 Debugging a VHDL design Compiling and loading the design ModelSim SE Tutorial 1 Create
48. e running for this example To get it running quickly invoke these commands from the ModelSim prompt after Initial setup T 123 cd solutions do traffic do 1 Run the state machine with these commands source state machine tcl draw_state_machine Click on one of the Run buttons 2 Now we ll make some changes to the light colors and transition arrows Open the source file with this command notepad state machine tcl Note the ModelSim EXAMPLE part 1 comments in the file You can change poth_red state coordinates from x 125 and y 50 to any coordinates You may need to uncheck the read only selection in the Edit menu before making changes 3 Note the ModelSim EXAMPLE part 2 comments in the file You can change the transition arrow coordinates to correspond with the new both_red state coordinates 4 Note the ModelSim EXAMPLE part 3 comments in the file Change the active color from black to purple 5 Reuse the original commands when you re ready to run the state machine remember to copy a previous command to the current command line select the previous ModelSim prompt source state machine tcl draw_state_machine Click on one of the Run buttons Notice the changes Try some additional changes if you wish This is the end of the Tcl Tk examples Continue to modify and test the examples if you wish you can recover the original files at any time in the tcl_tutorialoriginals directory ModelSim SE Tu
49. e workspace area of the Main window fw Modelsim File Edit View Compile Simulate Tools Window Help ee test_counter test_counter S VSIM 29 gt dut counter Function increment Be E HE E E OP x sim test_counter Now Ons Delta 0 A Structure pane The Structure tab shows the hierarchical structure of the design By default only the top level of the hierarchy is expanded You can navigate within the hierarchy by clicking on any line with a expand or contract symbol The same navigation technique works anywhere you find these symbols within ModelSim By clicking the next to dut counter you can see all three hierarchical levels test_counter counter and a function called increment If test_counter is not displayed you simulated counter instead of test_counter 5 Click on Function increment and notice how other ModelSim windows are automatically updated as appropriate Specifically the Source window displays the Verilog code at the hierarchical level you selected in the Structure window and the Signals window displays the appropriate signals Using the Structure tab in this way is analogous to scoping commands in interpreted Verilogs For now make sure the test_counter module is showing in the Source window by clicking on the top line in the Structure pane ModelSim SE Tutorial T 32 Lesson 3 Basic Verilog simulation Running the simulation Now you will exercise diff
50. ected Files This removes the exclusion filter on any lines from the selected file You can continue experimenting with the various exclusion commands at this point if you want However before continuing with the tutorial select Coverage gt Clear Out Current Filter to ensure all lines and files are included for the next exercise ModelSim SE Tutorial Merging coverage results from two simulations Merging coverage results from two simulations You can merge code coverage results from multiple simulations making it possible to run multiple tests on a design and assess coverage across all tests In this exercise we ll change the test that is run by the testbench resimulate and then append the coverage statistics from our previous analysis to the new analysis 1 Note how many times the clocked processes have been executed 2 Next we ll edit the which_test txt file Changing this text file causes a different test to be run from the same testbench Using ModelSim Notepad edit the file so it reads true data_switch_test Make sure the Edit gt read_only switch is not on notepad which_test txt B Notepad which_test txt File Edit Window true data_switch_test 3 Restart the simulation so the different test is run on the circuit restart f 4 Restore the coverage data from the last simulation run so that its data can be appended to the current simulation coverage reload cover dat coverage_summary MENU File
51. eft mouse button to pan the design T 111 Lesson 12 Running a batch mode simulation The goals for this lesson are e Runa batch mode VHDL simulation e Execute a macro DO file e View a saved simulation Batch mode allows you to execute several commands that are written in a text file You create a text file with the list of commands you wish to run and then specify that file when you start ModelSim This is particularly useful when you need to run a simulation or a set of commands repeatedly A Important Batch mode simulations must be run from a DOS or UNIX prompt Unless directed otherwise enter all commands in this lesson at a DOS or UNIX prompt Additionally this lesson assumes you have added ModelSim to your PATH If you did not you ll need to specify full paths to the tools i e vlib vmap vcom and vsim that are used in the lesson ModelSim SE Tutorial T 112 Lesson 12 Running a batch mode simulation ModelSim SE Tutorial To set up for this lesson create a new directory and copy this file into it lt install_dir gt modeltech examples counter vhd Create a new design library again enter these commands at a DOS or UNIX prompt in the new directory you created in step 1 vlib work Map the library vmap work work Then compile the source file lt install_dir gt lt platform gt vcom counter vhd You will use a macro file that provides stimulus for the counter For your convenience a mac
52. en the break occurs the Source window will not open Only the East West lights are working You can make both lights work by editing the lights tcl file Edit lights tcl with the notepad to add a when statement for the North South light notepad lights tcl You need to add this because the current statement is for the East West light only You ll find the solution commented Remember to change the read only status of the file so you can edit it You ll find the code commented out toward the end of the file use Edit gt Find and look for light_ns After you have made the changes reload and run the simulation again source lights tcl connect_lights Both lights are now working Note Remember if you need to return to the original Tcl files maybe you ve edited the file and it doesn t work right you ll find the files in the tcl_tutoriaNoriginals directory Add widgets to display simulation information Running the lights may be interesting but not very useful let s add some displays that will tell us what s happening to the cars at the intersection Now you will add queue widgets to display the sum of the length of each pair of queues as we simulate 8 The East West widget for displaying the total East West queue length is already provided Let s edit the source to add a display for the North South direction Use the notepad notepad queues tcl The solution is commented out in queues tcl The Queue Displ
53. ent Both PLI Programming Language Interface and VCD Value Change Dump are supported for ModelSim PE and SE users In addition all products support SDF 1 0 through 3 0 VITAL 2 2b VITAL 95 IEEE 1076 4 1995 and VITAL 2000 IEEE 1076 4 2000 Assumptions Assumptions T 7 We assume that you are familiar with the use of your operating system You should be familiar with the window management functions of your graphic interface either OpenWindows OSF Motif CDE KDE GNOME or Microsoft Windows 98 Me NT 2000 XP We also assume that you have a working knowledge of VHDL and Verilog Although ModelSim is an excellent tool to use while learning HDL concepts and practices this document is not written to support that goal Where to find our documentation ModelSim documentation is available from our website at www model com support documentation asp or in the following formats and locations Document Format How to get it Start Here for ModelSim SE installation amp support reference paper shipped with ModelSim PDF select Main window gt Help gt SE Documentation also available from the Support page of our web site www model com ModelSim SE Quick Guide command and feature quick reference paper shipped with ModelSim PDF select Main window gt Help gt SE Documentation also available from the Support page of our web site www model com ModelSim SE Tutorial PD
54. er 0 dut count clk rst E 8 initial Clock generator 3 begin 10 elk 0 LL 10 forever 10 clk clk 12 end 13 l4 initial Test stimulus 15 begin l6 rst 0 rF 5 rst l 18 4 rst 0 p 19 50000 stop 20 end 21 E a Df Ltcounter v cunter a aa E En 1 9 Col 0 read only 4b You can also use the Break button to interrupt a run MENU Simulate gt Break T 33 ModelSim SE Tutorial T 34 Lesson 3 Basic Verilog simulation Debugging Next we ll take a brief look at an interactive debugging feature of the ModelSim environment 1 Let s set a breakpoint at line 30 in the counter v file which contains a call to the Verilog function increment To do this select dut counter in the Structure pane of the Workspace Move the cursor to the Source window and scroll the window to display line 30 Click on or near line number 30 to set a breakpoint You should see a red dot next to the line number where the breakpoint is set The breakpoint can be toggled between enabled and disabled by clicking it When a breakpoint is disabled the dot appears open To delete the breakpoint click the line number with your right mouse button and select Remove Breakpoint gt Note Breakpoints can be set only on executable lines denoted by blue line numbers fi source counter y File Edit View Tools Window S60 2804 8 DANN FPO a 20 for i bO t earry lt bl i lt 7j
55. erent Run functions from the toolbar 1 Select the Run button on the Main window toolbar This causes the simulation to run and then stop after 100 ns the default simulation length PROMPT run MENU Simulate gt Run gt Run 100 ns 2 Next change the run length to 500 on the Run Length selector and select the Run button again jw Modelsim File Edit View Compile Simulate Tools Window Help Se GB ER woel Ek Eh E 53000 26 gt l 54001 26 54501 27 55000 27 56001 27 56501 28 57000 28 58001 28 58501 29 59000 29 test_counter test_counter dut counter Function increment HHRHHHHHHHH VSIM 33 gt X Now 600 ns Delta 2 sim test_counter y Now the simulation has run for a total of 600ns the default 100ns plus the 500 you just asked for The status bar at the bottom of the Main window displays this information 3 The last command you executed run 500 caused the simulation to advance for 50Ons You can also advance simulation to a specific time Type run 3000 This advances the simulation to time 3000ns Note that the simulation actually ran for an additional 2400ns 3000 600 ModelSim SE Tutorial Running the simulation 4 Now select the Run All button from the Main window toolbar This causes the simulator to run until the stop statement in tcounter v PROMPT run all MENU Simulate gt Run gt Run All f source tcounter File Edit View Tools Window 6 count
56. extension is optional you could recompile with one command do mycompile do gt Note Neither the prompt nor the Return that ends a command line are shown in the examples Lesson 1 Creating a Project The goals for this lesson are e Create a project A project is a collection entity for an HDL design under specification or test Projects ease interaction with the tool and are useful for organizing files and simulation settings At a minimum projects have a work library and a session state that is stored in a mpf file A project may also consist of e HDL source files or references to source files e other files such as READMEs or other project documentation e local libraries e references to global libraries For more information about using project files see the ModelSim User s Manual ModelSim SE Tutorial T 12 Lesson 1 Creating a Project Creating a project 1 Start ModelSim with one of the following for UNIX at the shell prompt vsim for Windows your option from a Windows shortcut icon from the Start menu or from a DOS prompt modelsim exe gt Note if you didn t add ModelSim to your search path during installation you will have to include the full path when you type this command at a DOS prompt Upon opening ModelSim for the first time you will see the Welcome to ModelSim dialog If this screen is not available you can display it by selecting Help gt Welcome Menu from the Main wi
57. filter out everything below a certain percentage hierCutoff is the minimum percent usage that will be listed in the Hierarchical Profile display The default value is 1 Any usage less than 1 will not be displayed You can also filter the display with the Under filter in the Hierarchical Profile window l Hierarchical Profile E Samples 1178 o aa C MODELTECH EXAMPLES profiler store vhd 43 C MODELTECH EXAMPLES profiler retrieve vnd 35 CMODELTECH EXAMPLE S profiler store vhd 46 C JMODELTECH EXAMPLE S profilerretrieve vhd 38 CJMODELTECH EXAMPLES profiler control vhd 87 CJMODELTECH EXAMPLE S profiler control vhd 98 CJMODELTECH EXAMPLES profiler control vhd 130 ModelSim SE Tutorial Running the simulation T 69 Double clicking on any line in the Hierarchical Profile window will open the Source window and allow you to view the relevant source code for that line The selected line will be highlighted in the Source window as shown below Here we ve double clicked retrive vhd 35 f source retrieve yhd File Edit Yiew Tools Window 28 29 30 31 32 33 34 BEGIN El Produces the decode logic which pointers to each location of the shift register retriever PROCESS buffers ramadrs counter_size l downto 0 BEGIN buffer size l I 35 amp 36 37 38 39 40 41 42 END IF end loop END PROCESS rxda lt rd0a and outstrobe lof retrieve vhd l gt
58. for item values in the List and Wave windows You can search for HDL item values in the List and Wave windows Select Edit gt Search from the window s menu to bring up the Signal Search dialog box List window version shown List Signal Search window list Signal Name s No Signals Selected Search Type Any Transition Rising Edge Falling Edge Search for Signal Value Value C Search for Expression Expression Bulder Search Options Search Forward fi Match Count I Ignore Glitches Search Search Reverse Search Results Status D Time RE You can locate values for the Signal Name s shown at the top of the dialog box The search is based on these options e Search Type Any Transition Searches for any transition in the selected signal s e Search Type Rising Edge Searches for rising edges in the selected signal s e Search Type Falling Edge Searches for falling edges in the selected signal s e Search Type Search for Signal Value Searches for the value specified in the Value field the value should be formatted using VHDL or Verilog numbering conventions ModelSim SE Tutorial T 56 Lesson 6 Finding names and values ModelSim SE Tutorial Search Type Search for Expression Searches for the expression specified in the Expression field evaluating to a boolean true Activates the Builder button so you can use the Expression Builder if desired The expression may involve
59. fter you have added the pushme procedure to your source you need to resource and rerun the Tcl procedure with these commands use the up arrow to scroll through the commands or do source source images tcl image_example Press all the buttons and notice the object names in the Main transcript Close the image example window when you re done ModelSim SE Tutorial T 126 Lesson 14 Tcl Tk and ModelSim Example 3 Simulate an intersection with traffic lights In this example yov ll simulate an intersection with traffic lights The simulation interface you create allows you to run what if scenarios efficiently Introduction of the traffic intersection widget This portion of our example introduces the traffic intersection widget You ll add other widgets to the intersection to create a custom traffic simulation environment Once again make sure you have completed Initial setup T 123 before working this example 1 Draw the intersection by invoking this command and procedure at the ModelSim prompt source intersection tcl draw_intersection 2 From the ModelSim prompt use the procedure set_light_state to change the color of the lights set_light_state green traffic i ns_light set_light_state green traffic i ew_light You can use the Copy and Paste buttons on the Main toolbar to help build instructions from previous commands 3 View the source code with this command at the ModelSim prompt notepad intersection tcl
60. his session Note that a test mpf file has been created in your working directory This file contains information about the project test that you just created ModelSim will open this project automatically the next time you invoke the tool Lesson 2 Basic VHDL simulation The goals for this lesson are Create a library and compile a VHDL file Load a design Learn about the basic ModelSim windows mouse and menu conventions Force the value of a signal Run ModelSim using the run command Set a breakpoint Single step through a simulation run The project feature covered in Lesson 1 executes several actions automatically such as creating and mapping work libraries In this lesson we will go through the entire process so you get a feel for how ModelSim really works ModelSim SE Tutorial T 18 Lesson 2 Basic VHDL simulation Compiling the design ModelSim SE Tutorial 1 Start by creating a new directory for this exercise in case other users will be working with these lessons Create the directory then copy all of the VHDL vhd files from lt install_dir gt modeltech examples to the new directory Make sure the new directory is the current directory Do this by invoking ModelSim from the new directory or by selecting File gt Change Directory Main window Start ModelSim with one of the following for UNIX at the shell prompt vsim for Windows your option from a Windows shortcut icon from the Start menu or
61. ice the new bus has a value that is made up of the values of its component signals arranged in a specific order Virtual objects are indicated by an orange diamond wave default Of x File Edit View Insert Format Tools Window SHS BRM RAKE RE RIAK gt test_counter clk test_counter rst gt test_counter Bus1 3 test_counter 2 test_counter 1 test_counter O test_counter Ef test_counter count wut ee Mu K 7 ll HH 3 337 ns to 426 ns ModelSim SE Tutorial Creating and viewing datasets Creating and viewing datasets Datasets allow you to view previous simulations or to compare simulations To view a dataset you must first save a ModelSim simulation to a WLF file using the vsim wlf command Once you have saved a WLF file you can open it as a view mode dataset In this lesson you will compare two simple Verilog designs a structural description and an RTL description of a 4 bit binary counter To begin you will simulate the structural description and save it to a WLF file Then you will simulate the RTL version Finally you will open the WLF file as a dataset and compare the two simulations in the Wave window Simulating the structural version 1 Start by creating a new working directory making it the current directory and copying the files from nodeltech examples datasets into it 2 Use the vlib command to create a wor
62. imulate an intersection with traffic lights e Draw a state machine that represents the simulation This lesson is divided into several Tcl examples intended to give you a sense of Tcl Tk s function within ModelSim The examples include a custom simulation interface created with Tcl Tk the code is already written gt Note You must be using ModelSim SE VHDL or ModelSim SE MIXED to complete these exercises ModelSim SE Tutorial T 118 Lesson 14 Tcl Tk and ModelSim More information on Tcl Tk Sources of information about Tcl include Tcl and the Tk Toolkit by John K Ousterhout published by Addison Wesley Publishing Company Inc and Practical Programming in Tcl and Tk by Brent Welch published by Prentice Hall Or consult one of the following online Tcl references e Select Help gt Tcl Man Pages Main window within ModelSim e http dev scriptics com has many useful references e The Model Technology web site lists a variety of Tcl resources www model com resources tcltk asp How Tcl Tk works with ModelSim ModelSim SE Tutorial ModelSim incorporates Tcl as an embedded library package The Tcl library consists of a parser for the Tcl language routines to implement the Tcl built in commands and procedures that allow Tcl to be extended with additional commands specific to ModelSim ModelSim generates Tcl commands and passes them to the Tcl parser for execution Commands may be generated by reading characters fr
63. irectory command from the ModelSim Main window At the ModelSim prompt in the Transcript pane run the compare do DO file do compare do This DO file does the following e Creates and maps the work library e Compiles the Verilog and VHDL files e Runs the simulation and saves the results to a dataset named gold wlf Feel free to open the DO file and take a look at its contents Editing a source file and re running the simulation T 85 Editing a source file and re running the simulation In the last step we ran the default mixed HDL simulation and saved it to the gold wif dataset Now we ll edit one of the source files and re run the simulation 1 Edit the proc v file by opening it in the Source window Make sure the Edit gt read only flag isn t selected 2 Scroll down and un comment the read cycle on line 78 Your source file should look like the following File Edit view Tools Window 6604 PAQA HL 04 panes 75 f f Read back 10 locations 76 for a 0 a 10 a at i begin 77 f uncomment for wavecompare 783 10 read a d 79 readia d 80 if id a S1 displayt t Read Write mismatch E th A 82 end 83 84 if verbose display Read Write test done 8s Fstopll 86 end 87 end 88 endmodule an 4 gt proc 4 SS WE SSE Ln 89 Col 0 P 3 Save the file in the Source window MENU File gt Save 4 Re compile the proc v file PROMPT vlog proc v
64. k library in the current directory vlib work MENU File gt New gt Library 3 Use the vmap command to map the work library to a physical directory A modelsim ini file will be written into the current directory vmap work work 4 Compile the structural version of the counter vlog cntr_struct v MENU Compile gt Compile 5 Load the design and save the simulation to a WLF file named struct wilf vsim wlf struct wlf work cntr_struct 6 Now you will run a DO file that applies stimulus to the design runs the simulation and adds waves to the Wave window Feel free to open the DO file and look at its contents do stimulus do MENU Tools gt Execute Macro The waves that appear in the Wave window are saved automatically into the struct wlf file 7 Quit the simulation quit sim MENU Simulate gt End Simulation T 63 ModelSim SE Tutorial T 64 Lesson 7 Using the Wave window Simulating the RTL version 1 Compile the RTL version of the counter vlog cntr_rtl v Simulate the design vsim work cntr_rtl a MENU Simulate gt Simulate Run the DO file to apply stimulus to the design do stimulus do Comparing the two designs ModelSim SE Tutorial To compare the two simulations we will create a second pane in the Wave window open the struct wif file and add the signals from the dataset to the new pane 1 Add a second pane to the Wave window Wave MENU Insert gt Window Pa
65. l Tk how it works with ModelSim T 118 Tcl source command T 122 Tk widgets T 121 Tech notes T 8 Technical support T 8 test signals T 83 Transcript save T 10 transcript DO file T 122 U Updates T 8 V Vera see Vera documentation Verilog compile T 26 interface checking between design units T 28 standards T 6 viewing design in Structure and Source windows T 42 Verilog 2001 current implementation T 6 Verilog simulation T 25 VHDL standards T 6 view_profile command T 68 vsim coverage command T 76 T 139 W Waveform Comparison icons T 91 reference signals T 83 test signals T 83 Windows finding HDL item names T 53 searching for HDL item values T 53 Dataflow window zooming T 110 List window locating time markers T 53 opening T 48 Wave window changing display range zoom T 60 cursor measurements T 59 locating time cursors T 53 using time cursors T 58 zoom options T 60 zooming T 60 Work library mapping T 46 Z Zoom Dataflow window T 110 from Wave toolbar buttons T 60 from Zoom menu T 60 options T 60 with the mouse T 61 ModelSim SE Tutorial T 140 ModelSim SE Tutorial
66. l see the compiled design units listed fw Modelsim File Edit view Compile Simulate Tools Window Help Compile of counter v was successful n Compile of tcounter y was successful EJ work Library work 2 compiles 0 failed with O errorfs A counter Module C mod N test_counter Module C mod ModelSim gt Ji vital2000 Library MODE Efi ieee Library MODE GEM modelsim_lib Library MODE Ss 6 The last step in this exercise is to load one of the design units Double click counter on the Library page You ll see a new page appear in the Workspace that displays the structure of the counter design unit fw Modelsim File Edit View Compile Simulate Tools Window Help ee BSR HY WHYHHRRN bP ModelSim gt cd counter counter tcounter y successful Function increment counter successful vsim work counter vsim work counter Loading work counter VSIM 5 gt At this point you would generally run the simulation and analyze or debug your design We ll do just that in the upcoming lessons For now let s wrap up by ending the simulation and closing the project Select Simulate gt End Simulation and confirm that you want to ModelSim SE Tutorial T 16 Lesson 1 Creating a Project ModelSim SE Tutorial quit simulating Next select File gt Close gt Project confirm that you want to close the project and select Yes to update your project file with the changes you made during t
67. l2 2b Library C modeltech vital2 2b nT vital2000 Library C modeltech vital2000 ii ieee Library MODEL_TECH ieee l ii modelsim_lib Library MODEL_TECH m nN std Library MODEL_TECH std ii std_developers Library MODEL_TECH st i spnopsys Library MODEL_TECH sy Simulate Simulator Resolution Add defaut Load Optimize Cancel If the Design Unit is an entity like counter in this design you can expand it to view any associated architectures EJA work Library work a counter Entity C modeltech example Al only Architec C modeltech example Select the entity counter and choose Load Next select View gt All Windows from the Main window menu to open all ModelSim windows PROMPT view For descriptions of the windows consult the ModelSim User s Manual Loading the design T 21 3 Next let s add top level signals to the Wave window by selecting Add gt Wave gt Signals in Region from the Signals window menu PROMPT add wave counter F signals File Edit view Add Tools Window count sim counter ModelSim SE Tutorial T 22 Lesson 2 Basic VHDL simulation Running the simulation ModelSim SE Tutorial We will start the simulation by applying stimulus to the clock input 1 Click in the Main window and enter the following command at the VSIM prompt force clk 1 50 0 100 repeat 100 Signals MENU Edit gt Clock ModelSim
68. licking it When a breakpoint is disabled the dot appears open To delete the breakpoint click the line number with your right mouse button and select Remove Breakpoint 18 PROMPT bp counter vhd 18 fi source counter vhd File Edit View Tools Window Sse teea FH MAHA H BPH a 15 variable result bit _vector input range input E 16 variable carry bit l 1 begin is for i in input low to input high loop 19 result i input i xor carry 20 carry i inputi and carry el exit when carry 0 EE end loop 23 return result 24 end increment 25 begin 26 27 ctr 23 process clk reset 29 begin WA counter vnd FN SIS SSS SS SSS a n Ln 14 Col 0 read only A gt Note Breakpoints can be set only on executable lines denoted by blue line numbers 5 Select the Continue Run button to resume the run that you interrupted ModelSim will hit the breakpoint as shown by an arrow in the Source window and by a Break message in the Main window i PROMPT run continue MENU Simulate gt Run gt Continue Bi ModelSim SE Tutorial T 24 Lesson 2 Basic VHDL simulation ModelSim SE Tutorial Click the Step button in the Main or Source window several times to single step through the simulation Notice that the values change in the Variables window you may need to expand the Variables window PROMPT step MENU Simulate gt Run gt Step 4 This concludes
69. low window MENU Edit gt Erase All ModelSim SE Tutorial Jumping to the source of an X T 107 Jumping to the source of an X In the last exercise you traced an unknown from process to process until you identified the source You can speed this up by jumping directly to the source in one step 1 Drag t_out from the Wave window to the Dataflow window as you did in the last exercise Select Trace gt ChaseX The design expands to show the source of the unknown Clear the Dataflow window MENU Edit gt Erase All ModelSim SE Tutorial T 108 Lesson 11 Debugging with the Dataflow window Displaying hierarchy in the Dataflow window You can display connectivity in the Dataflow window using hierarchical instances You enable this by modifying the options prior to adding items to the window 1 Select Tools gt Options from the Dataflow window menu bar 2 Check Show Hierarchy and then select OK Dataflow Options Ex Display connectivity 0 Semmen using hierarchical y enie instances X NOTE Changing this M Bottom inout pins option will cause the B r curent contents of the Dataflow window to be ter I Select equivalent nets Cancel ModelSim SE Tutorial Displaying hierarchy in the Dataflow window T 109 3 Add signal t_out to the Dataflow window add dataflow top p t_out 15 x dataflow File Edit view Navigate Trace Tools Window S Rad s BOQ mM be QA Ab ml
70. lowing line by deleting the leading in the vsim section of the file Startup do startup do Then save modelsim ini Note The modelsim ini file must be write enabled for this change to take place Using MS Explorer right click on lt install_dir gt modeltech modelsim ini then click Properties In the dialog box uncheck the Read only box and click OK You can also copy the file to your current directory Take a look at the DO file It uses the predefined variable entity to do different things when loading different designs Start the simulator and specify the top level design unit to be simulated by entering the following command at the UNIX DOS prompt vsim counter Notice that the simulator loads the design unit without displaying the Load Design dialog box This is handy if you are simulating the same design unit over and over Also notice that all the windows are open This is because the view command is included in the startup macro If you plan to continue with the following practice sessions keep ModelSim running If you would like to quit the simulator enter the following command at the VSIM prompt quit f You won t need the startup do file for any other examples so use your text editor to comment out the Startup line in modelsim ini T 117 Lesson 14 Tcl Tk and ModelSim The goals for this lesson are e Create a hello world button widget e Execute a procedure using a push button e S
71. more than one signal but is limited to signals logged in the List or Wave window Expressions may include constants variables and Tcl macros If no expression is specified the search will give an error See the ModelSim Command Reference for more information on expression syntax Search Options Match Count You can search for the n th transition or the n th match on value Match Count indicates the number of transitions or matches to search Search Options Ignore Glitches Ignore zero width glitches in VHDL signals and Verilog nets The result of your search is indicated at the bottom of the dialog box T 57 Lesson 7 Using the Wave window The goals for this lesson are Practice using the Wave window time cursors Practice zooming the waveform display Practice using Wave window keyboard shortcuts Practice combining items into a virtual object Practice creating and viewing datasets ModelSim SE Tutorial T 58 Lesson 7 Using the Wave window Using time cursors in the Wave window Any of the previous lesson simulations may be used with this part of the lesson or use your own simulation if you wish EEO alo File Edit View Insert Format Tools Window eH 2B RAE RK BD AAE FF HM top clk top prw top pstrb top prdy top paddr top pdata topsn top sstrb top srdy O ns to 388 ns ModelSim SE Tutorial 00000000 ooooo00000000000 select value here to jump t thatcursor selected cur
72. nd next difference find next annotated difference find last difference Use these icons to move the selected cursor The next and previous buttons cycle through differences on all signals To view differences for just the selected signal use lt tab gt and lt shift gt lt tab gt Saving the comparison You can save the comparison for later viewing either in a text file or in files that can be reloaded into ModelSim To save the difference information to a text file select Tools gt Waveform Compare gt Differences gt Write Report To save the comparison so it can be reloaded into ModelSim you must save two files Select Tools gt Waveform Compare gt Differences gt Save to save the computed differences Next select Tools gt Waveform Compare gt Rules gt Save to save the comparison configuration rules To reload the comparison later you would start a comparison and then use the Tools gt Waveform Compare gt Reload command ModelSim SE Tutorial T 92 Lesson 10 Comparing waveforms Viewing comparison results in the List window ModelSim SE Tutorial You can also view the results of your waveform comparison in the List window 1 Select View gt List to open the List window 2 Drag the region from the Compare tab in the Main window to the List window This will load the compared signals into the List window Scroll down the window and you ll see differences shown in yellow delta 2700 2705
73. ndow Welcome to ModelSim lt a amp menu Welcome to ModelSim Create a Project ModelSim Projects contain simulation details like compile settings source files or libraries The Project Manager also lets you include references to shared global files Start here to create a new ModelSim project Technology aarete CRA ROEE operat Open a Project Your most recent project is opened when you start ModelSim Start here if you d like to open an older project Open Documentation Start here if you d like to open the ModelSim PDF bookcase The entire doc set is indexed for searching within Acrobat Reader Tl Don t show this dialog again Close 2 Select Create a Project from the Welcome dialog or File gt New gt Project Main window In the Create Project dialog box enter test as the Project Name and select ModelSim SE Tutorial Creating a project T 13 a directory where the project file will be stored Leave the Default Library Name set to work Create Project xi Project Name ftes Project Location Ic modeltech win32 Browse Default Library Name work Upon selecting OK you will see a blank Project tab in the workspace area of the Main window and the Add Items to the Project dialog fw Modelsim File Edit view Compile Simulate Tools Window Help dd items to the Project xj Click on the icon to add items of that type a k Create New File Add Exi
74. ne Notice that a thick white vertical bar at the left edge of the window indicates that the new pane is active Open struct wlf dataset open struct wlf Wave MENU File gt Open Dataset Add signals for the struct dataset add wave Notice that the pathname prefix for the signals you just added is the dataset name struct The pathname prefix for the active simulation is sim The results for each simulation should be the same You can continue experimenting with the two simulations or quit the simulation quit sim Main MENU Simulate gt End Simulation T 65 Lesson 8 Simulating with the Performance Analyzer The goals for this lesson are e Runa simulation with Performance Analyzer turned on e View the Hierarchical and Ranked Profile displays e Use the Performance Analyzer statistics displayed in the Hierarchical Profile and the Ranked Profile to speed up simulation Performance Analyzer identifies the percentage of simulation time spent in each section of your code With this information you can identify bottlenecks and reduce simulation time by optimizing your code Users have reported up to 75 reductions in simulation time after using Performance Analyzer This lesson introduces the Performance Analyzer and shows you how to use the main Performance Analyzer commands gt Note You must be using ModelSim SE to complete this lesson ModelSim SE Tutorial T 66 Lesson 8 Simulating with th
75. nge the source code 12 Run the simulation again for 1000 ns run 1000 At this point the simulation will run without errors YSIM 30 gt run 1000 Note Test completed with no errors Time 1 us Iteration O Instance testbench 1VSIM 31 gt itbench Z This brings you to the end of this lesson but feel free to explore the system further When you are ready to end the simulation session quit ModelSim by entering the following command at the VSIM prompt quit f ModelSim SE Tutorial T 53 Lesson 6 Finding names and values The goals for this lesson are e Find items by name in tree windows e Search for item values in the List and Wave windows Start any of the lesson simulations to try out the Find and Search functions illustrated below ModelSim SE Tutorial T 54 Lesson 6 Finding names and values Finding items by name in tree windows ModelSim SE Tutorial You can find HDL item names with the Edit gt Find menu selection in these windows Dataflow List Process Signals Source Structure Variables and Wave windows Select Edit gt Find to bring up the Find dialog box List window version shown Find in list E3 Find Find Next Field Close IV Auto Wrap Direction Right Label C Left Enter an item label and Find it by searching Right or Left through the window display Searching for item values in the List and Wave windows T 55 Searching
76. of appropriate license fees a nontransferable nonexclusive license to use Software solely a in machine readable object code form b for your internal business purposes and c on the computer hardware or at the site for which an applicable license fee is paid or as authorized by Mentor Graphics A site is restricted to a one half mile 800 meter radius Mentor Graphics then current standard policies which vary depending on Software license fees paid or service plan purchased apply to the following and are subject to change a relocation of Software b use of Software which may be limited for example to execution of a single session by a single user on the authorized hardware or for a restricted period of time such limitations may be communicated and technically implemented through the use of authorization codes or similar devices c eligibility to receive updates modifications and revisions and d support services provided Current standard policies are available upon request 2 ESD SOFTWARE If you purchased a license to use embedded software development ESD Software Mentor Graphics or its authorized distributor grants to you a nontransferable nonexclusive license to reproduce and distribute executable files created using ESD compilers including the ESD run time libraries distributed with ESD C and C compiler Software that are linked into a composite program as an integral part of your compiled computer progr
77. og e cache v memory v e proc v ModelSim SE Tutorial T 40 Lesson 4 Mixed VHDL Verilog simulation ModelSim SE Tutorial Depending on the design the compile order of VHDL files can be very specific In the case of this lesson the file top vhd must be compiled last Stay in the Compile HDL Source Files dialog box and compile the VHDL files in this order this invokes the VHDL compiler vcom e utilvhd e setvhd top vhd Click Done to dismiss the dialog box Loading the design T 41 Loading the design 1 Load the design by selecting Simulate gt Simulate from the menu a PROMPT vsim top The Simulate dialog appears Click the sign next to work to see the design units You won t see this dialog box if you invoke vsim with top from the command line Select top and then click Load z Simulate k x Design work Library work cache Module C modeltech example cache_set Entity C modeltech examople memory Module C modeltech examople proc Module C modeltech examople std_logic_util Package C modeltech example IE top Entity C modeltech examople ii ieee Library MODEL_TECH ieee ii modelsim_lib Library MODEL_TECH m ii std Library MODEL_TECH std Simulate Simulator Resolution Add default J Load Optimize 2 From the Main menu select View gt All Windows to open all ModelSim windows PROMPT view ModelSim SE Tut
78. om an input source or by associating command strings with ModelSim s user interface features such as menu entries buttons or keystrokes When the Tcl interpreter receives commands it parses them into component fields and executes built in commands directly For commands implemented by ModelSim Tcl calls back to the application to execute the commands In many cases commands will invoke recursive invocations of the Tcl interpreter by passing in additional strings to execute procedures looping commands and conditional commands all work in this way ModelSim gains a programming advantage by using Tcl for its command language ModelSim can focus on simulation specific commands while Tcl provides many utility commands graphic interface features and a general programming interface for building up complex command procedures By using Tcl ModelSim need not re implement these features a benefit that allows its graphic interface to remain consistent on all platforms The only vestige of the host platform s graphic interface is the window frame manager The custom traffic light interface T 119 The custom traffic light interface The subject of our main Tcl Tk lesson is a simple traffic light controller The system is comprised of three primary components a state machine a pair of traffic lights and a pair of traffic sensors The components are described in three VHDL files traffic vhd the state machine queue vhd the traffic arri
79. ontrol vhd pathname to display the source code for control vhd in the Source window With Code Coverage enabled the Source window is displayed with an extra column that details the number of times each line has been executed The green Xs in the graphic below denote lines that have been excluded We ll discuss that later in the lesson Scroll the Source window to view the executable lines As you can see some lines have red zeros next to them This indicates a line that was not executed fi source control yhd 10 x File Edit View Tools Window 63 when Ol gt buffer _txd lt txd Fe 64 when 00 gt buffer _txd lt txd 5 65 when others gt buffer_txd lt X 66 end case 67 case control reg 2 downto is 68 when ll gt rxd lt buffer _rxd amp lll 69 rxd_active lt buffer_rxd 70 when 10 gt rxd lt l amp buffer rxd amp ll i FL rxd_active lt l ve when Ol gt rxd lt ll amp buffer _rxd 6 l 73 rxd_active lt l 74 when OO gt rxd lt lll amp buffer _rxd 75 rxd_active lt l 76 when others gt rxd lt XXXX rxd_active lt X 77 end case 78 END PROCESS Shhh Ln 144 Col 0 read only 4 ModelSim SE Tutorial Save the line coverage information to a text file coverage report file cover dat lines coverage_summary MENU Report gt Save Line Coverage Open the file cover dat to see how the data is store
80. orial T 42 Lesson 4 Mixed VHDL Verilog simulation 3 Take a look at the Structure pane in the workspace Ray ModelSim a O x File Edit Yiew Compile Simulate Tools Window Help es SOE HH MAE o X Loading C modeltech win32 ieee std_log ic_1164 body Loading C modeltech win32 verilog vl _ty pes body Loading work topfonly Loading work proc Loading work cache Loading work std_logic_util body Loading work cache_set only Loading work memory top top only p proc c cache m memory J Package std_logic_util E Package vl_types YSIM 54 gt Ni Now Ons Delta 0 sim top A Notice the hierarchical mixture of VHDL and Verilog in the design VHDL levels are indicated by a square prefix while Verilog levels are indicated by a circle prefix Try expanding and contracting the structure layers You ll find Verilog modules that have been instantiated by VHDL architectures and similar instantiations of VHDL items by Verilog 4 In the Structure pane click on the Verilog module c cache The source code for the Verilog module is now shown in the Source window ModelSim SE Tutorial Loading the design T 43 5 We ll use ModelSim s Find function to locate the declaration of cache_set within cache v From the Source window menu select Edit gt Find or The Find in dialog box is displayed Find in source top vhd
81. orial Tracing an X unknown T 103 Tracing an X unknown The Dataflow window lets you easily track an unknown value X as it propagates through the design The Dataflow window is linked to the stand alone Wave window so you can view signals in the Wave window and then use the Dataflow window to track the source of a problem As you traverse your design in the Dataflow window appropriate signals will be added automatically to the Wave window 1 Open the Wave window and add a signal view wave add wave top p t_out MENU View gt Wave GUI Open Signals window and drag signal to Wave window Note that t_out goes to an unknown state StX at time 0 and continues transitioning to StX throughout the run The red color of the waveform indicates an unknown value TT lox File Edit view Insert Format Tools Window SAS CBO RACV RD QQqk Fi AHH w a top p t_out Six Ons to 546 ns gt A ModelSim SE Tutorial T 104 2 Drag t_out from the Wave window to the Dataflow window AI lolx File Edit Yiew Navigate Trace Tools Window SiR adi BAI Mie HRM ARMA a QQ Bp wl str ENAND 24 Sel t out test d Extended mode enabled keep o A You must click somewhere in the Dataflow window to get the yellow signal values to appear As previously mentioned the Wave and Dataflow windows are designed to work together Try moving the cursor in the Wave window see Making c
82. ouse position is selected and then moved to the mouse position Another way to position multiple cursors is to use the mouse in the time box tracks at the bottom of the display Clicking anywhere in a track selects that cursor and brings it to the mouse position Cursors will snap to a waveform edge if you click or drag a cursor to within ten pixels of waveform edge You can set the snap distance in the Window Preferences dialog select Tools gt Window Preferences You can position a cursor without snapping by dragging in the area below the waveforms You can also move cursors to the next transition of a signal with these toolbar buttons Find Previous Find Next Transition Transition locate the next signal locate the previous signal value change for the value change for the selected signal selected signal ModelSim SE Tutorial T 60 Lesson 7 Using the Wave window Zooming changing the waveform display range Zooming lets you change the simulation range in the waveform pane You can zoom using a context menu toolbar buttons mouse keyboard or commands Using the Zoom menu You can access Zoom commands from the View menu on the toolbar or by clicking the right mouse button in the waveform pane The Zoom menu options include Zoom In Zooms in by a factor of two increasing the resolution and decreasing the visible range horizontally command wave treee zoomin Zoom Out Zooms out by a factor of two decreasing the
83. rences A In the Wave window a signal that contains timing differences between the two simulations is denoted by a red X over its yellow triangle Red difference markers in the waveform display area show the location of the timing differences on the waveforms as do the red lines in the horizontal scrollbar at the bottom of the window difference markers compare top pra lt gt prw No Data compare top pstrb lt gt pstrb No Data compare top prdy lt gt prdy No Data compare top paddr lt gt pad No Data compare top pdata lt gt pda No Data compare top srw lt gt srw No Data compare top pdata lt gt pdata 2310 ns jm Diff number 19 From time 2305 ns delta 0 to time 2345 ns delta 0 migold top pdata 0000000000000011 sim top pdata 0000000000000001 a a aE ay compare data Hover your mouse pointer over a difference marker to display a popup containing data about that timing difference Also note that when you place a waveform cursor over a difference the values column displays the text diff ModelSim SE Tutorial Viewing and saving the comparison data T 91 Compare icons The Wave window includes six waveform comparison icons that let you quickly jump between differences From left to right the icons do the ia Ae je gt a3 gt following find first difference find previous annotated difference find previous difference fi
84. resolution and increasing the visible range horizontally command wave treee zoomout Zoom Full Redraws the display to show the entire simulation from time 0 to the current simulation time Command wave treee zoomfull Zoom Last Restores the display to where it was before the last zoom operation command wave treee zoomlast Zoom Range Brings up a dialog box that allows you to enter the beginning and ending times for a range of time units to be displayed command wave treee zoomrange Zooming with toolbar buttons These zoom buttons are available on the toolbar Zoom in 2x Zoom out 2x zoom in by a factor of two zoom out by a factor of from the current view two from current view ModelSim SE Tutorial Zoom Full Zoom Mode zoom out to view the full change mouse pointer to range of the simulation zoom mode see below from time 0 to the current time Zooming changing the waveform display range T 61 Zooming with the mouse To zoom with the mouse first enter zoom mode by selecting View gt Mouse Mode gt Zoom Mode Wave window The left mouse button lt Button 1 gt then offers 3 zoom options by clicking and dragging in different directions e Down Right Zoom Area In e Up Right Zoom Out e Up Left Zoom Fit The zoom amount is displayed at the mouse cursor A zoom operation must be more than 10 pixels to activate Keyboard shortcuts for zooming Using the following keys when the mouse cursor is
85. ro file has been provided with ModelSim You need to copy this macro file from the installation directory to the current directory lt install_dir gt modeltech examples stim do Create a batch file using an editor name it yourfile With the editor put the following on separate lines in the file add list decimal do stim do write list counter lst git f and save to the current directory To run the batch mode simulation enter the following at the command prompt vsim do yourfile wlf saved wlf counter c This is what you just did in Step 7 e invoked the VSIM simulator on a design unit called counter e instructed the simulator to save the simulation results in a log file named saved wif by using the wlf switch e used the contents of yourfile to specify that values are to be listed in decimal to execute a stimulus file called stim do and to write the results to a file named counter I st the default for a design named counter Since you saved the simulation results in saved wif you can view the simulation results by starting up VSIM with its view switch vsim view saved wlf 10 11 T 113 Open these windows with the View menu in the Main window or the equivalent command at the ModelSim prompt view signals list wave Note If you open the Process or Variables windows they will be empty You are looking at a saved simulation not examining one interactively the logfile saved in saved wif was used to
86. rol vhd 98 CJMODELTECH EXAMPLES profilerfcontrol vhd 114 CJMODELTECH EXAMPLESiprofilerttestring vhd 1 37 CJMODELTECH EXAMPLES profileritestring vhd 96 CJMODELTECH EXAMPLE S profiler store_array vhd 40 C UMODELTECH EXAMPLES profileritestring vhd 98 CUMODELTECH EXAMPLES profiler control vhd 104 C MODELTECH EXAMPLES profiler control vyhd 130 CUMODELTECH EXAMPLES profileritestring vhd 1 22 CUMODELTECH EXAMPLES profilertestring vhd 97 CUMODELTECH EXAMPLES profiler control vhd 95 CUMODELTECH EXAMPLES profiler control vhd 84 C MODELTECH EXAMPLES profilerfretrieve_array vh CJMODELTECH EXAMPLES profileritestring vhd 99 CJMODELTECH EXAMPLES profiler control yhd 115 w Under filter ee ee ee ee ee ae ee ae a f CuMODELTECHIEXAMPLESiprofilericontrol vhd 83 C MODELTECH EXAMPLES profileritestring vhd 109 C MODELTECH EXAMPLES profiler control vhd 101 gt Note You results may look slightly different as a result of the computer you re using and different system calls that occur during the simulation ModelSim SE Tutorial T 74 Lesson 8 Simulating with the Performance Analyzer 11 Set the Under filter to 2 and click the Update icon This will filter out all usage values below 2 Hierarchical Profile C MODELTECH EXAMPLE S profiler control vhd 87 CJMODELTECH EXAMPLES profiler store_array vhd 39 CJMODELTECH EXAMPLE Siprofilericontrol vhd 98 CUMODELTECHIEXAMPLE Siprofiler control vhd 114 CUMODELTECH EXAMPLE Siprofiler
87. s T 59 for more information on setting cursors ModelSim SE Tutorial Tracing events T 101 6 Totrace to the first contributing event select Trace gt Trace next event A new cursor is added to the wave viewer marking the last event the transition of the strobe to 0 which caused the output of 0 on t_out Inputs af top p strb top p test Outputs 7 Trace the next event two more times and then select Trace gt Trace event set ModelSim SE Tutorial T 102 Lesson 11 Debugging with the Dataflow window The dataflow pane sprouts to the preceding process and shows the input driver of signal strb Notice too that the wave viewer now shows the input and output signals of the newly selected process ST lolx File Edit view Navigate Trace Tools Window Sa Rad BROT M be kE APMGA Q i Bp aj strb NANDE24 t_out test SHS sO RAT Di AQek Inputs _ of top p strb_r gt FUER a S top p strb 500 ns Zi 225 ns KEZA P E Extended mode enabled Keep 1 top p ASSIGNH 7 1 You can continue tracing events through the design in this manner select Trace next event until you get to a transition of interest in the wave viewer and then select Trace event set to update the dataflow pane Clear the Dataflow window before moving on to the next exercise Also close the wave viewer pane MENU View gt Show Wave ModelSim SE Tut
88. s is financially practical or otherwise reasonably available Mentor Graphics may require the return of Software and refund to you any license fee paid less a reasonable allowance for use 8 3 Mentor Graphics has no liability to you if the alleged infringement is based upon a the combination of Software with any product not furnished by Mentor Graphics b the modification of Software other than by Mentor Graphics c the use of other than a current unaltered release of Software d the use of Software as part of an infringing process e a product that you design or market f any Beta Code contained in Software or g any Software provided by Mentor Graphics licensors which do not provide such indemnification to Mentor Graphics customers 8 4 THIS SECTION 8 STATES THE ENTIRE LIABILITY OF MENTOR GRAPHICS AND ITS LICENSORS AND YOUR SOLE AND EXCLUSIVE REMEDY WITH RESPECT TO ANY ALLEGED PATENT OR COPYRIGHT INFRINGEMENT BY ANY SOFTWARE LICENSED UNDER THIS AGREEMENT 9 TERM This Agreement remains effective until expiration or termination This Agreement will automatically terminate if you fail to comply with any term or condition of this Agreement or if you fail to pay for the license when due and such failure to pay continues for a period of 30 days after written notice from Mentor Graphics If Software was provided for limited term use this Agreement will automatically expire at the end of the authorized term Upon any termination or
89. s rs es sim top srw 0 sim top sstrb 1 sim top srdy 1 sim top saddr 00001001 DOCOO000 ogoogo 00000010 sim top sdata compare top clk lt gt clk No Data compare top prw lt gt prw No Data compare top pstrb lt gt pstrb No Data compare top prdy lt gt prdy No Data compare top paddr lt gt pad No Data compare top pdata lt gt pda No Data compare top srw lt gt srw No Data compare top sstrb lt gt sstrb No Data compare top srdy lt gt srdy No Data compare top saddr lt gt sad No Data compare top sdata lt gt sda No Data T 3620 ns 500 EEZ SS Oe yyy Ons to 777 ns A T 89 ModelSim SE Tutorial T 90 Lesson 10 Comparing waveforms The Compare tab in the Main window shows the region that was compared and the transcript area shows the number of differences found between the timing of the Reference and Test datasets jw Modelsim File Edit view Compile Simulate Tools Window Help Ss BO FT wala Be Time 2820 ns Iteration 0 Instance top p Break at proc line 75 dataset open C modeltech compare gold wif gold C modeltech compare gold wif opened as dataset go Id compare start gold sim compare options track compare add recursive all wave Created 11 comparisons compare run Computing waveform differences from time 0 ns to 2820 ns issef Found 39 diffe
90. searching for values T 53 force command T 22 frequently asked questions T 8 H Hierarchical Profile T 68 update icon T 74 Hierarchy of a mixed VHDL Verilog design T 42 of a Verilog design T 31 IEEE Std 1076 T 6 IEEE Std 1364 T 6 K Keyboard shortcuts Wave window T 61 L Libraries creation and mapping T 46 ModelSim SE Tutorial T 138 Index LSF app note on using with ModelSim T 8 M Macros T 10 O Operating systems supported T 6 P Pan Dataflow window T 110 Performance Analyzer T 65 hierarchical profile T 68 report command T 74 Q quit VSIM command T 24 T 36 R reference signals T 83 report command T 74 restart T 35 Reusing commands T 10 run VSIM command T 22 S Searching for values and finding names in windows T 53 in tree windows T 54 Shortcuts command history T 9 Wave window T 61 Signal transitions searching for T 60 Signals applying stimulus to T 22 display values with examine command T 35 Simulating code coverage T 75 with Performance Analyzer T 65 ModelSim SE Tutorial Simulation batch mode T 111 executing commands at startup T 115 mixed VHDL Verilog T 37 saving results in log file T 112 Simulate dialog box T 29 T 41 single stepping T 24 Verilog T 25 view switch T 112 wlf switch T 112 Software updates T 8 solutions to the examples T 121 Standard Developer s Kit User Manual T 7 standards supported T 6 Support T 8 System initialization file T 116 T Tc
91. sor is bold ju u interval measurement When the Wave window is first drawn there is one cursor located at time zero Clicking anywhere in the waveform display brings that cursor to the mouse location You can add cursors to the waveform pane by selecting Insert gt Cursor or the Add Cursor button shown below The selected cursor is drawn as a bold solid line all other cursors are drawn with thin dashed lines Remove cursors by selecting them and selecting Edit gt Delete Cursor or the Delete Cursor button shown below Add Cursor Delete Cursor t add a cursor to the Wave delete the selected cursor window from the window Using time cursors in the Wave window T 59 Finding a cursor The cursor value corresponds to the simulation time of that cursor Choose a specific cursor view by selecting View gt Cursors Wave window You can also select and scroll to a cursor by double clicking its value in the cursor value pane Alternatively you can click a value with your second mouse button and type the value to which you want to scroll Making cursor measurements Each cursor is displayed with a time box showing the precise simulation time at the bottom When you have more than one cursor each time box appears in a separate track at the bottom of the display ModelSim also adds a delta measurement showing the time difference between two adjacent cursor positions If you click in the waveform display the cursor closest to the m
92. start the simulation with the modified files restart f MENU Simulate gt Run gt Restart 9 Run timerun do again and note the difference in simulation run time Your time may differ from that shown here but the new run should be very fast roughly ten times faster than the original simulation time do timerun do fw Modelsim SE File Edit view Compile Simulate Tools Window Help Se SO El oHe E aA e XI H RXDA Mark at 29488400 ns Primary Channel m pemeyen test_ringbufftest_ring AXDA Mark at 29489200 ns Primary Channel ing_ inst maba AXDA Mark at 29490200 ns Primary Channel ee mgou RXDA Mark at 29490600 ns Primary Channel WM Package textio H AXDA Mark at 29491400 ns Primary Channel J Package std_logic_unsigned Profiling paused 188 samples taken 54 in user cod f P e J Package std_logic_arith 1008110908 E Package std_logic_1164 2 0 Total Run Time 0 Minutes 2 Seconds E Package standard Now 30 ms Delta 4 sim test_ringbuf 2 ModelSim SE Tutorial Speeding up the simulation T 73 10 Look again at the Hierarchical Profile and you will see more lines showing view_profile MENU Tools gt Profile gt View hierarchical profile Hierarchical Profile _ 5 x W Samples 135 x Under i EEA I SSS C MODELTECH EXAMPLES profiler control vhd 87 C MODELTECH EXAMPLES profiler store_array vhd 39 Update icon CUMODELTECH EXAMPLE Siprofiler cont
93. sting File M a Create Simulation Create New Folder workspace Project test lt No Design Loa e ModelSim SE Tutorial T 14 Lesson 1 Creating a Project ModelSim SE Tutorial The next step is to add the files that contain your design units Click Add Existing File in the Add Items to Project dialog For this exercise we ll add two Verilog files Click the Browse button in the Add file to Project dialog box and open the examples directory in your ModelSim installation Select tcounter v and counter v Select Reference from current location and then click OK Add file to Project File Name tcounter v counter Browse Add file as type Folder default Top Level 4 Click your right mouse button 2nd button in Windows 3rd button in UNIX in the Project page and select Compile gt Compile All fw Modelsim E File Edit view Compile Simulate Tools Window Help om he Loading project test ModelSim gt Compile Selected Name Staus Type TT Fal ut tcounter v Edit C ompile Simulate Compile Out of Date Compile Order Compile Report Compile Summary lt No Contexi Add to Project gt Remove from Project Close Project Customize View Properties Project test lt Creating a project T 15 5 The two files are compiled Click on the Library tab and expand the work library by clicking the icon You l
94. t test_adder_structural and then click Load PROMPT vsim t ns work test_adder_structural l Simulate al S Oj xj Design VHDL Verilog Libraries SDF Options Library library_2 Entity C modeltech example Entity C modeltech example Entity C modeltech example Package C modeltech examople Entity C modeltech example Config C modeltech examople Config C modeltech example C modeltech example Load Optimize ModelSim SE Tutorial T 48 Lesson 5 Debugging a VHDL design Running the simulation 1 Start by opening the Process Variables and Signals windows using the command below Note that you can abbreviate window names view p si v Main MENU View gt lt window name gt 2 Now run the simulation for 1000 ns run 1000 A message in the Main window will notify you that there was an assertion error VSIM 20 gt run 1000 I Error Sum is 00000111 Expected 00001000 Time 600 ns Iteration O Instance testbench Note There were ERRORS in the test Time 1 us Iteration 0 Instance testbench T IVSIM 219 estbench p ModelSim SE Tutorial Debugging the simulation T 49 Debugging the simulation Let s find out what s wrong Perform the following steps to track down the assertion message 1 First change the simulation assertion options Select Simulate gt Simulation Options from the Main window menu
95. test_bench_rtl Run the simulator for 3 milliseconds run 3 ms Running a simulation with Code Coverage T 77 6 Display the coverage_summary window view_coverage MENU Tools gt Source Coverage coverage summary aT File Coverage Report Lines Hits C modeltech win32 vhdl_stc ieee 228 C modeltech win32 vhdl_stc std ta 507 C modeltech win32 vhdl_stc synog 502 C modeltech win32 vhdl_stc synop 50 retieve_array vhd fingrtl vhd store_array vhd testring hd 83 4 gt 1429 108 75 IF csb 0O THEN Z control reg lt switch 62 when 10 gt buffer txd lt txd l 63 when Ol gt buffer txd lt txd 2Z 64 when 00 gt buffer txd lt txd 3 70 when 10 gt rxd lt l amp buffer _rxd amp 11 7l rxd_active lt LNs fe s Misses Excluded The top half of the window shows summary information on a per file basis If you select a file in the list the bottom part of the window gives details about the lines in the file that have zero coverage Note that both testring vhd and control vhd are below 90 and therefore shown in red in the Coverage bar graph 90 is the default coverage threshold and all coverage values below 90 will be shown red The default coverage threshold can be changed with the Tcl control variable PrefCoverage cutoff ModelSim SE Tutorial T 78 Lesson 9 Simulating with Code Coverage Click on the c
96. testring vhd 1 37 C MODELTECH EXAMPLES profilertestring vhd 96 12 Use the report command to output a file with the profile data profile report hierarchical file hier rpt cutoff 4 This command outputs a hierarchical profile of performance data with the file name hier rpt fm source hier rpt Efe File Edit Yiew Tools Window esHs 42808 EF INSEL EM PR l 2 Hierarchical profile generated Wed Feb 0S 11 32 11 Z002 3 Number of samples 135 4 Number of samples in user code 54 47 5 Cutoff percentage lt 4 6 7 Name Under In Parent Se 9 C MODELTECH EXAMPLES profiler control vhd gt 13 13 10 C MODELTECH EXAMPLES profiler store array vhd 8 7 11 C MODELTECH EXAMPLES profiler control vhd gt gt 4 4 12 4 bf hier rpt f gt int CoO read only 13 Quit the simulation guit f ModelSim SE Tutorial T 75 Lesson 9 Simulating with Code Coverage The goals for this lesson are e Runa simulation with Code Coverage ON and examine the coverage_summary window e Save line coverage information to a text file e Exclude lines and files from the coverage statistics e Append results from a previous simulation run onto the next one ModelSim Code Coverage allows you to identify which lines in your code are being covered by the testbench You can merge the results of multiple tests making it possible to use multiple testbenches or multiple stimulus files It is non intrusive
97. the Main window 2 Open the Signals and Dataflow windows view sid MENU View gt Signals View gt Dataflow 3 Drag signal strb from the Signals window to the Dataflow window File Edit View Navigate Trace Tools Window S Tad BOOM Ke HHH AMA a Q Qi b gt al IGN FHA stb Extended mode enabled Keep 1 top p strb Z ModelSim SE Tutorial T 98 Lesson 11 Debugging with the Dataflow window 4 Double click the net that is highlighted in red The view expands to display the processes that are connected to strb File Edit View Navigate Trace Tools Window Sa adi t BBQ MW be o RHM AMAA Q amp Bb ml 10 x HALYVAYS 1 44 ASSIGNH1 7 1 ln mle pstrb wen stro FNAND 24 ne oen t_out prw prdy _r La paddr Extended mode enabled Keep 1 top p strb Z 5 Select signal test on process AND 24 and expand the view to show its drivers MENU Navigate gt Expand net to drivers se Notice that after the display expands the signal line for strb is highlighted in green This highlighting lets you know the path you have traversed in the design 6 Select signal oen on process ALWAYS 144 and expand the view to show its readers MENU Navigate gt Expand net to readers 7 Continue exploring if you wish When you are done clear the Dataflow window before moving on to the next exercise MENU Edit gt Erase all ModelSim SE Tutorial Tracing e
98. the basic VHDL simulation tutorial When you re done quit the simulator by entering the command quit force This command exits ModelSim without asking for confirmation T 25 Lesson 3 Basic Verilog simulation The goals for this lesson are e Compile a Verilog design e List signals in the design e Examine the hierarchy of the design e Simulate the design e Change the default run length e Set a breakpoint The project feature covered in Lesson executes several actions automatically such as creating and mapping work libraries In this lesson we will go through the entire process so you get a feel for how ModelSim really works ModelSim SE Tutorial T 26 Lesson 3 Basic Verilog simulation Compiling the design ModelSim SE Tutorial If you ve completed any previous VHDL lesson you ll notice that Verilog and VHDL simulation processes are almost identical 1 Create and change to a new directory to make it the current directory You can make the directory current by invoking ModelSim from the new directory or by using the File gt Change Directory command from the ModelSim Main window Copy the Verilog files files with v extension from the lt install_dir gt modeltech examples directory into the current directory Before you can compile a Verilog design you need to create a design library in the new directory If you are familiar only with interpreted Verilog simulators such as Cadence Verilog X
99. torial Debugging the simulation T 51 The assertion shows that the Signal sum does not equal the sum field in the Variables window Note that the sum of the inputs a b and cin should be equal to the output sum But there is an error in the test vectors To correct this error you need to restart the simulation and modify the initial value of the test vectors F signals zol xf It variables File Edit view Add Tools Window File Edit view Add Window adders n 8 EL test_patterns 00000000 00000001 0 01 1 00000000 00000001 0 00 2 00000001 00000001 0 00 3 00000001 00000001 1 00 4 00001 010 00000011 0 00 5 00000011 00001010 0 00 6 00000101 00000001 1 00 sim ftestbench 00000101 00000001 sim testbenchitest 8 Restart the simulation again restart f 9 Update the Variables window by selecting the test process in the Process window 10 In the Variables window expand test_patterns and test_pattern 6 again Then highlight the sum record by clicking on the variable name not the box before the name and select Edit gt Change from the menu Change Selected Variable ug Variable Name testbench test test_pattems 6 sum Value 00000111 enoe cos ModelSim SE Tutorial T 52 Lesson 5 Debugging a VHDL design 11 Change the value to 00000111 and then click Change Note that this is a temporary edit you must use your text editor to permanently cha
100. torial T 130 ModelSim SE Tutorial T 131 License Agreement IMPORTANT USE OF THIS SOFTWARE IS SUBJECT TO LICENSE RESTRICTIONS CAREFULLY READ THIS LICENSE AGREEMENT BEFORE USING THE SOFTWARE This license is a legal Agreement concerning the use of Software between you the end user either individually or as an authorized representative of the company purchasing the license and Mentor Graphics Corporation Mentor Graphics Ireland Limited Mentor Graphics Singapore Private Limited and their majority owned subsidiaries Mentor Graphics USE OF SOFTWARE INDICATES YOUR COMPLETE AND UNCONDITIONAL ACCEPTANCE OF THE TERMS AND CONDITIONS SET FORTH IN THIS AGREEMENT If you do not agree to these terms and conditions promptly return or if received electronically certify destruction of Software and all accompanying items within 10 days after receipt of Software and receive a full refund of any license fee paid END USER LICENSE AGREEMENT 1 GRANT OF LICENSE The software programs you are installing downloading or have acquired with this Agreement including any updates modifications revisions copies and documentation Software are copyrighted trade secret and confidential information of Mentor Graphics or its licensors who maintain exclusive title to all Software and retain all rights not expressly granted by this Agreement Mentor Graphics or its authorized distributor grants to you subject to payment
101. trols all internal window features including menus buttons and scroll bars The resulting simulator interface remains consistent within these operating systems e SPARCstation with OpenWindows OSF Motif or CDE e IBM RISC System 6000 with OSF Motif e Hewlett Packard HP 9000 Series 700 with HP VUE OSF Motif or CDE e Linux Red Hat v 6 7 or later with KDE or GNOME e Microsoft Windows 98 Me NT 2000 XP Because ModelSim s graphic interface is based on Tcl Tk you also have the tools to build your own simulation environment Easily accessible preference variables and configuration commands simulator preference variables and graphic interface commands give you control over the use and placement of windows menus menu options and buttons Standards supported ModelSim SE Tutorial ModelSim VHDL supports both the IEEE 1076 1987 and 1076 1993 VHDL the 1164 1993 Standard Multivalue Logic System for VHDL Interoperability and the 1076 2 1996 Standard VHDL Mathematical Packages standards Any design developed with ModelSim will be compatible with any other VHDL system that is compliant with either IEEE Standard 1076 1987 or 1076 1993 ModelSim Verilog is based on IEEE Std 1364 1995 and a partial implementation of 1364 2001 see lt install_dir gt modeltech docs technotes vlog_2000 note for implementation details Standard Hardware Description Language The Open Verilog International Verilog LRM version 2 0 is also applicable to a large ext
102. uit the simulator quit f ModelSim SE Tutorial T 83 Lesson 10 Comparing waveforms The goals for this lesson are Compare two simulations using the Comparison Wizard View comparison results and timing difference markers in the Wave window Use compare icons to jump to previous and next difference markers View comparison results in the List window Set an edge tolerance Waveform Comparison computes timing differences between test signals and reference signals In this exercise we re going to run and save the mixedHDL simulation edit one of the source files run the simulation again and finally compare the two runs The general procedure for comparing waveforms has four main steps 1 2 Selecting the simulations or datasets to compare Specifying the signals or regions to compare Running the comparison Viewing the comparison results ModelSim SE Tutorial T 84 Lesson 10 Comparing waveforms Creating the reference dataset ModelSim SE Tutorial We ll start by running a simulation and saving it to a dataset This dataset will become the reference dataset when we set up the comparison 1 Start by creating a new directory for this exercise Create the directory and copy all of the files from lt install_dir gt modeltech examples mixedHDL to the new directory Make sure the new directory is the current directory Do this by invoking ModelSim from the new directory or by selecting the File gt Change D
103. up with the value e select the count variable in the Source window right click it and select Examine from the context menu e use the examine command to output the value to the Main window transcript examine count ModelSim SE Tutorial T 36 Lesson 3 Basic Verilog simulation ModelSim SE Tutorial 5 Let s move through the Verilog source functions with ModelSim s Step command Click Step on the toolbar source counter y Ox File Edit View Tools Window z 4 gt tcounter w counter E gt RENEE 6 23 carry val i carry ste E z4 end z5 end 26 endfunction 27 28 always posedge clk or posedge reset 29 if reset 30 count ftpd_ reset _to count h00 31 else 32 count lt tpd_oclk to count increment count 33 34 35 To make module counter synthesizeable use the following 36 alternate form of the always block 37 38 fF FETTER EKKEEEEEEREEEEREERKEREREEEERE Ln 30 Col 0 read only A This command single steps the debugger Experiment by yourself for awhile Set and clear breakpoints and use the Step and Step Over commands until you feel comfortable with their operation When you re done quit the simulator by entering the command quit force T 37 Lesson 4 Mixed VHDL Verilog simulation The goals for this lesson are Compile multiple VHDL and Verilog files Simulate a mixed VHDL and Verilog design View the design in the
104. urce Files Library work X Look in a examples e fe c EJ datasets tel tutorial i counter vhd foreign CA vidpoker un gates vhd vn testadder __ mixedHDL 1 vpi vu io_utils vhd _I pli wuJadder vhd un jedec vhd profiler vn bvadd vhd un pali6r8 vhd uc counter v un stimulus vhd gt File name Jcounter vhd Files of type HDL Files v vl vhd vho hdl vo Done Default Options Edit Source Complete the compilation by selecting counter vhd from the file list and clicking Compile Select Done when you are finished You can compile multiple files in one session from the file list Individually select and compile the files in the order required by your design Note that you can have ModelSim determine the compile order See Auto generating compile order in the Project chapter of the ModelSim User s Manual for details T 19 ModelSim SE Tutorial T 20 Lesson 2 Basic VHDL simulation Loading the design ModelSim SE Tutorial 1 Load the design unit by selecting Simulate gt Simulate a PROMPT vsim counter The Simulate dialog box appears Click the sign next to work to see the counter design unit You won t see this dialog box if you invoke vsim with counter from the command line Simulate Design Eb Jig work Library work E counter Entity C modeltech example ii ieeepure Library C modeltech ieeepure ii vita
105. ursor measurements T 59 for details and yov ll see that the value of t_out changes in the Dataflow window We ll look at other links between the windows as we work through the tutorial 3 Move the Wave window cursor back to a time when t_out is unknown Then with t_out selected in the Dataflow window trace the unknown MENU Trace gt Tracex ModelSim SE Tutorial Tracing an X unknown T 105 The input signal test is selected in the Dataflow window and it is also added automatically to the Wave window waye default 7 A Fie Edit view Insert Format Tools Window 15 x SES ABQ RAT R GA QQQk FAH top p t_out a top p test Ons to 546 ns 4 Continue tracing back to the source of the unknown Select Trace gt TraceX again This time signal test2 is highlighted in the Dataflow window and it is also added to the Wave window ModelSim SE Tutorial T 106 Lesson 11 Debugging with the Dataflow window 5 Select Trace gt TraceX once more and yov ll discover the source of the unknown In this case there is a HiZ on input signal test_in and a 1 on input signal _rw so output signal test2 resolves to an X dataflow File Edit View Navigate Trace Tools Window SR ad BBO M he o kE ARMA JAR 39 vy NANDE ry ENANDH22 test est test _in or strb test NAND 24 Extended mode enabled Keep 1 itopip test2 Z 6 Clear the Dataf
106. val queue and tb_traffic vhd the testbench You could of course simulate this system with ModelSim s familiar interface but Tcl Tk provides us the option to try something different Since we re simulating something most of us have seen and experienced before we can create an intuitive interface unique to the simulation Overview The table below summarizes the source files procedures and commands used to simulate the traffic light controller VHDL source files Tcl procedures create and ModelSim commands are run via describe the system connect the interface plus the the new interface using the Tcl source files to ModelSim procedures draw_intersection traffic vhd connect_lights vsim lib vhdl work tb_traffic queue vhd examine value lt light_timing gt tb_traffic vhd draw_queues draw_controls force freeze var val ns ModelSim SE Tutorial T 120 Lesson 14 Tcl Tk and ModelSim The result is a traffic intersection interface similar to this illustration wm widget Calls to the operating system window manager to create the traffic window frame and scale widget A scale widget within a frame widget creates an analog entry device for a minimum to a maximum value and invokes the force command canvas widget button widgets label widget N The background lines Each button invokes the Astate lab el Is anded to ime end of the and traffic lights are indicated run or
107. vents Tracing events Another useful debugging feature is tracing events that contribute to an unexpected output value Using the Dataflow window s embedded wave viewer you can trace backward from a transition to see what process or signal is causing the unexpected output 1 If you didn t do so in the last exercise clear the Dataflow window 2 Select p proc in the sim tab of the Main window and then drag signal t_out from the Signals window into the Dataflow window 3 Open the embedded wave viewer and increase the size of the window MENU View gt Show Wave lt dataflow 15 x File Edit View Navigate Trace Tools Window S Rad BROOM be yE ZARA Q amp Bo mi str HNAND 24 t_out test SHa B RAL RK QB QQQh NES 2 IA ee Se Extended mode enabled Keep 1 top p t_out T 99 ModelSim SE Tutorial T 100 Lesson 11 Debugging with the Dataflow window 4 Select process NAND 24 in the dataflow pane Notice that all input and output signals of the process are displayed automatically in the wave viewer TTT ox File Edit view Navigate Trace Tools Window SiR ap BAZA ee e eH ABA A Q amp Bp m SUS BB AEAT Inputs top p strb top p test A Sh ID Poe EE Extended mode enabled Keep 1 top p ANAND 24 5 Seta time cursor in the wave viewer at the last transition of signal t_out 465 ns See Making cursor measurement
108. within the Wave window will cause the indicated actions Key Action il or zoom in oOo zoom out for F zoom full lor L zoom last ror R zoom range lt arrow up gt scroll waveform display up lt arrow down gt scroll waveform display down lt arrow left gt scroll waveform display left lt arrow right gt scroll waveform display right lt page up gt scroll waveform display up by page lt page down gt scroll waveform display down by page lt tab gt searches forward right to the next transition on the selected signal lt shift tab gt searches backward left to the previous transition on the selected signal lt Control f gt Windows lt Control s gt UNIX opens the find dialog box searches within the specified field in the pathname pane for text strings ModelSim SE Tutorial T 62 Lesson 7 Using the Wave window Combining items in the Wave window The Wave window allows you to combine EMARE E x signals into buses Select Tools gt Name l Combine Signals to open the Combine Order of Indexes Selected Signals dialog C icy A bus is acollection of Soke signals concatenated in a specific order to create a new virtual signal with a specific value T Remove selected signals after combining In the illustration below four data signals have been combined to form a new bus called Bus1 Not
109. you and an authorized agent of Mentor Graphics Waiver of terms or excuse of breach must be in writing and shall not constitute subsequent consent waiver or excuse The prevailing party in any legal action regarding the subject matter of this Agreement shall be entitled to recover in addition to other relief reasonable attorneys fees and expenses Rev 03 00 ModelSim SE Tutorial T 136 ModelSim SE Tutorial Index T 137 Numerics 1076 IEEE Std T 6 1364 IEEE Std T 6 A application notes T 8 Assertion errors T 48 B Batch mode simulation T 111 Breakpoints T 23 continuing simulation after T 23 C Code Coverage T 75 coverage_summary window T 77 reload T 81 report T 78 vsim coverage command T 76 Command history T 9 compare icons T 91 Compile compile order T 39 compile order of Verilog modules T 28 mixed HDL design T 39 Verilog T 26 coverage_summary window T 77 D Dataflow window pan T 110 zoom T 110 Debugging a VHDL design T 45 Design library creating T 18 T 27 T 38 do command T 10 DO files executing a DO file in batch mode T 112 using a DO file at startup T 116 using the transcript as a DO file T 10 documentation T 7 drag and drop T 9 E Errors breaking on assertion T 49 finding in VHDL designs T 49 viewing in Source window T 50 examine command T 35 examples Tcl example solutions T 121 F Find dialog box T 54 Finding a cursor in the Wave window T 59 Finding names and
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