Verilog course for Engineers – Verilog coding tutorials

Verilog is a hardware descriptive language that is used for modeling digital systems at many levels of abstraction ranging from algorithmic-level to gate-level to the switch-model. In this Verilog course, we will learn the basics of the HDL, its syntax, different levels of abstraction, and see practical examples of designing sequential and combinational circuits. We will also write test benches for all the circuits we design.

Course content

Verilog Design Units – Data types and Syntax in Verilog

This is where you get acquainted with some of Verilog HDL’s most commonly used language elements. Don’t worry if you can’t remember everything from this post. You’ll eventually pick them up along the way. Just focus on understanding the syntax, the purpose, and the working of these elements.

Gate level modeling in Verilog

Gate-level modeling is the lowest abstraction layer of Verilog. In this modeling style, you’ll get up close and personal with the circuit design and code it in terms of its logic gates. Let’s take a look at the structure and syntax that we’ll use to gate-level code any circuit.

Dataflow modeling in Verilog

Dataflow modeling is the second abstraction level in Verilog HDL. A step above gate-level modeling. This post explains the concept, the syntax, rules and the steps to use dataflow modeling to describe digital circuits. Dataflow modeling is perhaps the easiest way to describe a circuit.

Behavioral Modeling Style in Verilog

Behavioral modeling in Verilog is an important modeling style. In this post, we will take a look at all its rules, tools, and available Verilog syntax and structures.

Operators in Verilog

Any language comes with its own set of permissible operations. Here are the ones that you can use in Verilog. This post is a systematic representation of all the operators in Verilog with brief descriptions and easy to understand examples of their applications. The usage of operators is an important fundamental concept to understand.

How to write a testbench in Verilog?

It’s imperative that you test your circuit design before you implement it. Testing and verification is an integral part of VLSI, and we ‘ll be writing the testbenches for every module that we study in this Verilog course. In this post, we’ll discuss the relevant syntax, language elements, and system commands with examples.

Verilog Code for AND Gate – All modeling styles

An in-depth tutorial on encoding an AND gate in Verilog with the testbench code, RTL schematic and waveforms using all possible modeling styles.

Verilog Code for OR Gate – All modeling styles

An in-depth tutorial on encoding an OR gate in Verilog with the testbench code, RTL schematic and waveforms using all possible modeling styles.

Verilog code for NAND gate – All modeling styles

An in-depth tutorial on encoding a NAND gate in Verilog with the testbench code, RTL schematic and waveforms using all possible modeling styles.

Verilog code for NOR gate – All modeling styles

An in-depth tutorial on encoding a NOR gate in Verilog with the testbench code, RTL schematic and waveforms using all possible modeling styles.

Verilog code for EXOR gate – All modeling styles

An in-depth tutorial on encoding an EXOR gate in Verilog with the testbench code, RTL schematic, and waveforms using all possible modeling styles.

Verilog code for XNOR gate – All modeling styles

Next up, let’s design the XNOR logic gate in Verilog using gate-level, dataflow, and behavioral modeling. As is tradition, we will also generate its RTL schematic, write a testbench, and validify our code using the simulation waves.

Verilog Code for NOT gate – All modeling styles

Finally, we design the NOT logic gate in Verilog using gate-level, dataflow, and behavioral modeling. This is an important logic gate and by this point into the Verilog course, you might as well as take a swing at this yourself without having to read the post. If you get stuck, you can always take a peek.

Verilog code for Full Adder using Behavioral Modeling

A complete line by line explanation, testbench, RTL schematic, TCL output and Verilog code for a full-adder using the behavioral modeling style of Verilog.

Verilog Code for Half Subtractor using Dataflow Modeling

A complete line by line explanation and the testbench and Verilog code for a half-subtractor using the dataflow modeling style of Verilog.

Verilog Code for Full Subtractor using Dataflow Modeling

A complete line by line explanation, testbench, RTL schematic and Verilog code for a full-subtractor using the dataflow modeling style of Verilog.

Verilog Code for Half and Full Subtractor using Structural Modeling

A complete line by line explanation, implementation and testing of the Verilog code for half and full subtractor using structural modeling.

Verilog code for 2:1 Multiplexer (MUX) – All modeling styles

A complete explanation of the Verilog code for a 2×1 Multiplexer (MUX) using Gate level, Dataflow, Behavioral, and Structural modeling along with the testbench.

Verilog code for 4:1 Multiplexer (MUX) – All modeling styles

A complete explanation of the Verilog code for a 4×1 Multiplexer (MUX) using Gate level, Dataflow, Behavioral, and Structural modeling along with the testbench.

Verilog code for 8:1 Multiplexer (MUX) – All modeling styles

A complete explanation of the Verilog code for a 8×1 Multiplexer (MUX) using Gate level, Dataflow, Behavioral, and Structural modeling along with the testbench.

Verilog Code for Demultiplexer Using Behavioral Modeling

A complete line by line explanation, implementation and the Verilog code for demultiplexer using behavioral architecture and different statements like case and assignment.

Verilog code for priority encoder – All modeling styles

A priority encoder is a very important circuit when we wish to reduce the number of connections in our projects. Let’s encode the encoder using Verilog HDL in three different modeling styles.

Verilog code for D flip-flop – All modeling styles

This post explains the Verilog description of the D flip-flop using the gate-level, dataflow, and behavioral modeling methods.

Verilog code for SR flip-flop – All modeling styles

The next flip-flop we’re gonna code in this Verilog course is the SR flip-flop. Now that you’ve read the post on D flip-flop, would using the dataflow modeling style be a good choice here? Read on to find out.

Verilog code for JK flip-flop – All modeling styles

And finally, we will describe the JK flip-flop using Verilog HDL. If you’ve comfortably modeled the flip-flops above, this will be a piece of cake. In fact, why don’t you take this up a challenge? Try it once, come back and check if you’ve got it right.

Verilog Quiz | MCQs | Interview Questions

This Verilog quiz is crafted to test your concepts across a broad range of fundamental Verilog concepts. The questions are accompanied by solutions. Pass this quiz to get access to the Verilog course certification quiz. Please ensure that you are logged in before you attempt this quiz.

More details

What will you learn in this Verilog course?

  • Understand the basic syntax of the HDL
  • Get adept at the various modeling styles for implementing digital logic using Verilog.
  • Implement common combinational and synchronous and asynchronous sequential circuits using Verilog.
  • Write test benches to verify the design.
  • You’ll learn how to generate the RTL schematic and observe the behavior of your module using wave diagrams.

What is the target of this course?

This course is part of the VLSI track. We have designed this track to equip learners with the basic demands and requirements of entry-level jobs/internships in the field of frontend or backend VLSI design.

Are there any software or hardware requirements for this course?

Yes. For software, we strongly recommend Vivado. It is a heavy programming environment but at the same time, it is a standard one. In addition to that, you can also use it for FPGA prototyping. If you are not comfortable with Vivado, you can opt for an Icarus Verilog + GTKwave combo.

For hardware, it is optional to use an FPGA board for this course. If you’d like to use one to adopt a more hands-on approach, we recommend the Xilinx Artix 7 FPGA board, or the Altera Cyclone II mini-FPGA board, or the Xilinx Spartan 3E FPGA development board.

Are there any pre-requisites for this course?

How many quizzes are there in this course?

One

What’s the course structure like?

  • Syntax and design elements
  • Different modeling styles
    • Gate level modeling
    • Dataflow modeling
    • Behavioral modeling
  • Operators
  • How to write a testbench?
  • Verilog coding of digital circuits (With testbench)
    • Logic gates
    • Multiplexers
    • Demultiplexers
    • Encoder
    • Priority Encoder
    • Decoders
    • Comparators
    • Flip-flops
    • Counters
    • Shift-registers
    • Adders
    • Subtractors
  • Quiz 1
  • Certification test (Coming soon)

What is Verilog?

  • Verilog is a hardware descriptive language that is used for modeling digital systems at many levels of abstraction ranging from algorithmic-level to gate-level to the switch-model. The complexity of a digital system could vary from that of a simple gate to a complete electronic system or anything in between.  The digital system can be expressed hierarchically and the timing can be modeled within the same description for the whole system.
  • The Verilog HDL is an IEEE standard – number 1364. The first version of the IEEE standard for Verilog was published in 1995. A revised version was published in 2001; this is the version used by most Verilog users.  A further revision of the Verilog standard was published in 2005, though it has little extra compared to the 2001 standard. SystemVerilog is a huge set of extensions to Verilog and was first published as an IEEE standard in 2005.

What is the importance of Verilog?

  • Verilog is preferred by 99% of the industries and is especially prominent in RTL. It is easier to upgrade your skillset to include SystemVerilog and SystemC if you are working in Verilog HDL.
  • To model a digital circuit, Verilog is necessary to write the codes after the design specification is fully understood and before the netlist is generated before synthesis.  If you are associated with RTL coding and building module-level test benches, then Verilog is the right language to proceed with.

What is the difference between Verilog and VHDL?

  • VHDL is strongly typed, deterministic and more verbose whereas Verilog is weakly typed, more concise, and only deterministic if you follow some rules carefully, with predefined data types.
  • VHDL syntax is non-C like whereas Verilog is more C like.
  • VHDL has a lot of programming constructs but lacks low-level modeling capabilities for accurately representing hardware. Whereas Verilog is good at hardware programming but lacks in having higher-level programming constructs.

I would like to suggest some topics to be covered, how can I do that?

You can visit the contact page linked in the footer of this webpage. Just select “Suggest Topics” from the subject dropdown menu of the form, mention the course and why you think your suggestion makes sense to be part of the curriculum.