Write, Compile, and Simulate a Verilog model using ModelSim

I write Verilog code to model an inverter logic gate, compile that Verilog code into a model whose behavior I can simulate, and simulate the behavior of that model, all within ModelSim Altera starter edition. I present it in a conversational style.
Thanks for watching!

[@ahailu20]

Excellent video. A lot of videos show only simulation with test-bench files. I like that you show how to quickly simulate without a test-bench, using "force" to assign values to inputs and quickly see simulation results.

[@sidharthk.burnwal2044]

it is the only video that helped me to run a verilog code .Thanks a lot

[@studyvite]

Glad to hear you found it helpful, Sidharth! Thanks for letting us know.

[@deshantdevkota2563]

true only useful video

[@paulspark7287]

I love a really clear and helpful tutorial like this. Thank you so much for taking the time to go through this clearly - and starting with something extremely simple.

[@Arclight1314]

Hey, this got me started! Thanks for the basic stuff. Something I'd like to add is if all of your windows are in different tabs, the layout is probably set to "NoDesign". Changing it to Simulate changes it to a multi-pane view!

[@XxFWLxX311]

From a very confused Computer Engineering Major with an awful teacher, I thank you for this!

[@mriduldebnath5527]

It is first time that I run a VHDL program with the help of your very effective video. Thanks

[@Ivan-eo5pq]

Это ИДЕАЛЬНОЕ видео, в котором я понял, как запускать код Verilog !!! огромное спасибо Автору !

[@altanilyaz14]

Wow, after all these years, it is still working. Thanks a lot!

[@LongHoang-xl7vj]

only this channel helps me run simulate my verilog code sucessfully. thanks a lot

[@viktorh2460]

thanks for the video, would be great if you could explain how to implement a Testbench code to simulate different inputs

[@vizier_of_the_dead]

Very nice, no nonsense tutorial. This got me started. Thanks.

[@oyoyo2900]

Thank you for this video. The explanation is very clear and easy to understand. This video helped me to get going.

[@Sicglorytransit]

There are like 20+ tutorials using Modelsim-Altera. Nobody has a good demonstration of using Modelsim PE / SE, because it's wicked confusing how to import and use the proper libraries. Please consider making a video with that version of Modelsim

[@Annihilator49]

Remember that simulators are especially dangerous in hardware design. Simulators are very handy but there are many things they don't catch. Nothing beats putting the code on a board.

[@studyvite]

+Peter Bayley - Thanks for pointing out that relying on simulation alone can be dangerous. I agree, as you said, that simulating can be handy; for example, when the logic designers don't have access to boards.

[@somesharunvn]

I started back to work in verilog after a long time..This video is really a good start..Thanks!!

[@studyvite]

Thank you for giving me your feedback. I'm glad you benefited from watching it. I, too, spent several years away from logic design and verification before returning.

[@williesolomon614]

Very important explaination. I will wait to a more complicated program you will make about Verilog.

[@CuriousMotor]

more than 6 years, and this video is still useful :)

[@ektasingh3508]

Thank you i was facing problem while running this software thanks for this wonderful Explaination.

[@rikitarurikitaru7716]

Лучшее видео в 2020, спасибо. Мне помогло сдать Курсовую работу

[@minazaky5336]

every time I try to simulate i cant find the file in work library but when I press the simulate shortcut it gives this error message: #can't read "Startup(-L)": no such element in array # Load canceled please help !!

[@dhruvo100]

i am having this problem in my 2nd project.. any fix?

[@stegemma]

Thanks for this very clear and simple tutorial.

[@prameshpandeya9482]

you saved my whole day..thank you very much!

[@TheAInfinity]

You don't really need to learn Verilog to do simulations using ModelSim. You can just Altera's Quartus ii to draw the design diagrams and them have the Quartus ii write the verilog code for you. After that you can just get that code and run it on ModelSim and simulate your design. But it's a good language to know.

[@studyvite]

+Agent Smith - Thanks for suggesting people use that feature of Quartus. I haven't used it yet. It sounds handy to me, though. Oftentimes, I think people are tasked with updating existing designs (either written by themselves or by colleagues) as opposed to creating new designs "from scratch." I wonder what role that feature of Quartus would play in that situation.

[@bushratasneem435]

Very useful video!! Kindly make a video about using testbench.

[@madhavjha1663]

thanks for the video it gave me too much confidence

[@muralidhartirupati2492]

Hi, After creating verilog file,I click on edit Instead of opening, a pop up opens with all the system software and asking me choose one software

[@krutikakhakhkhar5645]

Thank you so much for this video, I was very confused about this!!!!!

[@nonaahmed2076]

Thank you so much, that really helped me a lot.

[@studyvite]

+Nona ahmed - Thanks! I'm glad you found it helpful.

[@commonman8150]

thanks a lot you helped me started with verilog

[@studyvite]

+jathavath ram - You're welcome! I hope you have been enjoying using Verilog.

[@ayushgemini]

@Studyvite While working with ModelSim do we necessary create different files to define each module. Or we can also define multiple modules within same file?

[@Jordii511]

Thanks from Spain!!!

[@studyvite]

+Jordi lp - De nada! (de los estados unidos)

[@yanxunli587]

Very detailed explanation. Thanks a lot

[@panman002]

i write the code but the library work says it is empty so i can not simulate it... could you please help me??

[@vivek_viswa]

Hey @Verilog Jobs. This video means a lot!Thanks for detailing.I proceeded with steps mentioned.But when I try to simulate,the modelsim application is closing automatically.I am using in Windows 8.Can you help me out for sorting this issue,Thanks

[@ShamamKazem]

Thanks a lot . This is so helpful and clear

[@studyvite]

+Sham 11 : You're welcome! I'm glad you found it helpful and clear.

[@bilinmathew78]

hi...thanks for the tutorial..I have a question.. when i try simulate the verilog code..it says *Error loading design... what to do..?

[@akifalviarnab]

Hey bro, I'm facing the same problem, did you figure it out?

[@lohithtej7523]

It's very helpful video .. tnqq u soo much sir

[@CarlosRodriguez-ww5rl]

Extremely helpful! Thank you

[@studyvite]

Thanks for giving me your feedback, Carlos! I'm glad you found it helpful.

[@TheWarfan118Beast]

Bless your heart. Thank you Very Much!!!!!!!

[@knikhil271083]

Nice Explanation. Was helpful to me.

[@akaras250]

Very helpful!!! Thank you very much!

[@MilanKarakas]

Man! You have new subscriber! If it is not trouble (your channel is about Verilog), I got it working on new versions of ModelSim(10.1d), and VHDL example, just chose simulation language VHDL. Here is the same example as above but in VHDL: ------------------------------------ library IEEE; use IEEE.std_logic_1164.all; entity myInverter is port(myInput:in std_logic; myOutput:out std_logic); end myInverter; architecture logic of myInverter is begin myOutput Run Simulation Tool->RTL Simulation. After that, on left side in Library, find Work, and below is your file... double click to open simulation. The rest is the same as on video. Just new version is different. If you can't find "Wave", go to View->Wave (it is not there by default).

[@indrj23]

Thanks a lot , it's really helpful.

[@BasicPoke]

Well done, very clear, thank you. To edit your file, you can double-click on it in the Project window instead of right-click > Edit. I don't understand why we need to use the Library tab to simulate the project. It seems obvious that I would want to simulate my project, so why use the 'Library'?

[@tailuong9824]

very detailed. thank you

[@diniramadhani77]

Can you make a verilog code about digital clock and how it runs in model sim?

[@radhikay1935]

very nice video, could you please also show schematic view of this design, how to see it. Also how to compile multiple verilog codes

[@Alex-jb6hn]

nice video, this video helped me to run a vhdl code. thanks

[@tahsinalmahi8769]

Thanks a lot. Very helpful video.

[@alexmaximas384]

I just subscribed your channel. Thanks for sharing.

[@hemantb6505]

At time 13.09, The wave is initially set one and the inverse is one and then after it then opposite was done.Then why is the secound half merged more in the middle, seems little wierd. I'm new for the tool, can you please elaborate?

[@studyvite]

Hi Hemant, ModelSim inserts some vertical space between each wave in an attempt to help the user distinguish one wave from another, similar to how KZbin inserts vertical space between each line of text in each comment in an attempt to help the user distinguish one line of text from another. From time 0s to time 0.1ns, myInput is 1 and myOutput is 0. At time 0.1ns, myInput changes to 0 and myOutput changes to 1.

[@somesharunvn]

Hemant, At first the Value is set to "1" so the output is "0" it runs for 100ps (i.e, 0.1ns). Then forcing the input to "0" and when you click run it starts from the point the previous run completed. So the second run will have its effect between 0.1ns and 0.2ns. So when u click full screen in wave it shows the graph like the one shown at 13:09!!

[@hemantb6505]

***** Thankyou!👻👻

[@GurpalSingh-zt5bk]

That was helpful and can you make video on test bench files like its use or how to make one

[@immymeeka]

thankyou for this helpful vid . i hope there will be video for testbench

[@vikaspapana6744]

This video is nice. But in my system I am getting an error while loading the design after compilation was successful. What should I do now ?

[@ankithprabhu4552]

hey...i am not seeing the wave option below the verilog text editor...what should i do?

[@franciscomaerle3216]

right click in the edit screen > add > wave

[@mallikarjunbhadrannavar.9428]

Ankith Prabhu eeddrydyfdudddyrytfryrt

[@mallikarjunbhadrannavar.9428]

?

[@tuannguyenuc5553]

very useful...! thanks you so much!

[@sambigbite11]

If I have a project and there are multiple verilog ot vhdl file and I am passing teh clock from top module file to other files. I am trying to simulate it with model sim but the clock in other modules (file) shows as no value where as I am giving clock to the top module clock. May I know how can use modelsim for whole project.

[@chacha256]

Thank you :) very helpful !

[@studyvite]

Thanks, +Minha Cha, I'm glad you found it helpful!

[@RajnishKumar-dq4ni]

great video..thank u

[@lancelotrampaculan2075]

I have a question guys, my default 'work' library is always empty even after compiling and saving a module, how do I get rid of this? Thanks in advance!

[@andreabelian1861]

Very nice video. simple and clean. thank you. this means any code you can test by applying a value to each pin and modelsim will simulate and we can see the result on output. it will be nice if you can demonstrate how to make test bench. again thank you very much

[@linczhang7466]

Nice tutorial , thanks

[@hanifmulyawan7760]

hello, thanks for your explanation, but i have some question. why the work on my library still empty after i compile the project? hope someone will help me thanks..

[@ankurjain4312]

great help to start..Thanks

[@rayomandirani5663]

Great video and really helpful

[@mahdivakili7353]

awesome, thanks.

[@shandeeparya1618]

Can we able to run Verilog pli in modelsim ? If yes may I know the switch or command to run Verilog pli ?

[@SaideepRokzz]

Thank you very much helped a lot

[@studyvite]

+Saideep Kamishetty - Thank you! I'm glad to hear it helped you.

[@MANVENDRASINGHMANOHAR]

how you change colour scheme of your fonts for example how your Myinverter appear in light blue colour.Please tell

[@DigitalZombie90]

Great video

[@TuanNguyen-pj2lv]

hi bro code in module Sim is the same as xilinx ISE?

[@ehsanqiyassi1991]

How did you make modelsim to do the auto indenting?!

[@משהכהן-ש6ה]

this is a good video. thanks.

[@asmaasaid2187]

thank you so much that helped me to start thanks but if i need ask any question in writing my program can you help me or not ? ans also where the educational page of you in face book

[@ayeshailyas3353]

i dont have any file in work section after the successful compilation.

[@GhulamAbbas-um8vo]

i have followed all the step in the installation of modelsim but i could not get the licence email

[@baharehghadirian2998]

Thanks it helped a lot

[@navyasree6323]

thank u that was really helped me alottttttttt

[@mirzahassanbaig1148]

sir i am having issue in simulation , i could not find any file in the work library..

[@balaakshayasuresh1899]

I am facing error while loading the design .can u please give us a link from where you have downloaded the software

[@brightosman]

Thanks this was helpful to me

[@johnchen6310]

Hi Verilog Jobs, I need help urgently. After compiling my selected file, the work library is empty and hence I cannot simulate anything.

[@1arslanyaqoob]

+John Chen i am having the same issue...any fix??

[@khembaral8679]

+John Chen , same issue with me too, any solution???

[@amanpandae4078]

Go to File -> change Directory -> choose any directory -> and after that please make sure that u save ur code after writing

[@eksiyazar8170]

hey man,after you write verilog code,be ctrl+S .if you do it your problem is fix.

[@TerranIV]

Make sure you save everything again after compiling

[@MrSocialish]

why does "work" show up empty when I do this? I haven't changed a single thing, and my code compiles....

[@eksiyazar8170]

write code after CTRL+S after compile OK

[@vasilisnikitaras]

Amazing

[@spaceghost8327]

wow thank you

[@VND-ch5bb]

I tried your code and your guiding but there is a problem which is I can not compile this code example: //Model an inverter logic gate module MyInverter{ MyInput, MyOutput }; input MyInput; output MyOutput; assign MyOutput = ~ MyInput; endmodule I run on Linux (ubuntu 15.10) OS. Help me please!

[@studyvite]

Hi Van-Nam Dinh, thanks for trying out our code. The code in your comment looks good to me, except for one thing (or two things, depending upon how you look at it): The port list in your comment is surrounded by curly braces '{...}' instead of parentheses '(...)'. I recommend changing the curly braces into parentheses and giving it another go!

[@VND-ch5bb]

:) I did it and it is correctly now! could you suggest me links or books that are useful for beginner in Verilog! I would like to study it for Digital Design! any of your experience is very meaningful to me! many thanks!

[@mostafakabary8696]

the work folder is empty after i successfully compile the code any help

[@gurrambhaskarreddy9490]

Can we run ModelSim software on Mac?

[@himamadhu8754]

My work library shows empty what is d reason

[@siddheshghodekar7401]

Save ur file then re-compile and then try again

[@rajdasadia8840]

I’m having similar problem, did you figure out how to fix it?

[@electronicsthedeep7122]

@@rajdasadia8840 same Cury

[@preethig5768]

thank you soooooooooooooomuchhhhhhhhhhhhhhhhhhhhhhh

[@Jaliyagodage]

Thank you.

[@kothamahesh100]

hlpd me a lot..thnx

[@sbrscoading801]

🙏🏽 please make small video tutorials on Verilog

[@shubhamarya1306]

thank you so much...

[@RajuChaudhariraju]

why does model sim student edition does not work

[@MrBravery103]

That helped thanks XD

[@dhruvo100]

hi how do u make a testbech loop???

[@jackiemach2396]

What is a waveform?

[@redHope387]

hello, i need to download the software Quartus Altera for windows 32 bits .. Can someone help me please ? thank you

[@SaieenTwist]

When i open the text editor for verilog file , notepad is opened instead of the modelsim editor. hat to do? you can see it from : ibb.co/eNq2iv Does anyone have any solution?