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Fast-track Verilog for VHDL Users

Intermediate Level - 2 days

Fast-track Verilog for VHDL Users is an intensive 2-day conversion-training course teaching the application of the Verilog® Hardware Description Language for programmable logic and ASIC design. It is not suitable for engineers who haven’t already attended the Comprehensive VHDL course or are not well practised in VHDL based design.

By emphasising the similarities and highlighting the differences between the VHDL and Verilog languages and the associated design flows, this course fast-tracks delegates through the Verilog learning curve. It is designed to enable VHDL based engineers to be Verilog-ready for transition to SystemVerilog application. (Check out scheduling and packaging options with SystemVerilog for New Designers, Comprehensive SystemVerilog and Modular SystemVerilog.)

If you:
  • require this training prior to attending a scheduled Comprehensive SystemVerilog course, or
  • have an onsite team based training requirement (for which the course content, scope and duration can be customised to the best fit your specific context),

please contact the Doulos team to discuss your needs, or complete an online enquiry.

The syllabus covers the Verilog language, coding for register transfer level (RTL) synthesis, developing test fixtures, and using Verilog tools. A number of supplementary topics are also available, including a preparatory overview of SystemVerilog.

Workshops comprise approximately 50% of class time and are based around carefully designed exercises to reinforce and challenge the extent of learning. Because Doulos is an independent company, our clients can choose the design tools used during the workshops.

  • Engineers proficient in VHDL who need to be conversant with Verilog to evaluate or migrate to SystemVerilog
  • Engineers who are proficient in VHDL but need to become competent in the application of, and interaction with, the Verilog HDL as well.
  • The differences and similarities between VHDL and Verilog
  • How to use the Verilog language for hardware design and logic synthesis
  • How to write thorough Verilog text fixtures to verify your designs
  • How to avoid common mistakes when coding Verilog for synthesis

Delegates must have attended the Doulos Comprehensive VHDL course (or equivalent) and have a good working knowledge of VHDL and digital hardware design. No previous knowledge of Verilog is required.

Doulos Course materials are renowned as the most comprehensive and user friendly available. Their style, content and coverage is unique in the HDL training world and has made them sought after resources in their own right. Course fees include:

  • Fully indexed course notes providing a concise Verilog reference
  • Workbook full of practical examples to help delegates apply their knowledge
  • Doulos Verilog Golden Reference Guide e-book, a quick and complete reference for language, syntax, semantics and tips
  • Tool tour guides (to support the tools and technologies of your choice)

If you would prefer a paperback version of your Doulos Golden Reference Guide, this can be purchased from the Doulos online shop.


What is Verilog? • Brief history and current status • The PLI • Scope of Verilog • Design flow • Verilog-2001 • SystemVerilog • Verilog books and Internet resources

Differences between VHDL and Verilog

“Philosophy” • Red Tape • Strong typing • Determinisim • Data abstraction • Structure vs behaviour – Nets vs registers • Language structure – architecture, packages, configurations, files • Identifiers • Output ports • Implicit wires • Arrays • Aggregates • Signedness • Operators • Signal vs variables/nets • Process vs initial/always • if, case, loop differences • File i/o • Hierarchical names

Verilog Basics

Modules & ports • Continuous assignments • Comments • Names • Nets and strengths • Design hierarchy • Module instances • Primitive instances • Text fixtures • $monitor • Initial blocks • Logic values • Vectors • Registers • Numbers • Output formatting • Timescales • Always blocks • $stop and $finish • Using nets and variables correctly

Combinational Logic

Event control • If statements • Begin-endw Incomplete assignment and latches • Unknown and don’t care • Conditional operator • Tristates • Case, casez and casex statements • full_case and parellel_case directives • For, repeat, while and forever loops • integers • Self-disabling blocks • Combinational logic synthesis

Sequential Logic

Synthesising flip-flops & latches • Avoiding simulation race hazards • Nonblocking assignments • Asynchronous & synchronous resets • Clock enables • Synthesizable always templates

Other features of Verilog

Verilog operators • Part selects • Concatenation & replication • Shift registers • Conditional compilation • Parameterisation and generate • Hierarchical names • Arithmetic operators and their synthesis • Signed and unsigned values • Memory arrays • RAM modelling and synthesis • $readmemb and $readmemh

Tasks and Functions

Understanding tasks • Task arguments • Task synchronization • Tasks and synthesis • Functions

Test Fixtures

File I/O – Writing to files; File access using MCDs; Reading from files • Automated design verification using Verilog • Force and release • Gate-level simulation • Back annotation using SDF • “Traditional” Verilog libraries • Configuration and libraries • Command-line options • Behavioural modelling

Supplementary Subjects

Behavioural Verilog

Algorithmic coding • Synchronization using waits & event control • Concurrent-disabling of always blocks • Named events • Fork & join • High-level modelling using tasks, Implicit FSMs and concurrent-disabling • Understanding intra-assignment controls • Overcoming clock skew • Blocking and nonblocking assignments • Continuous procedural assignment

Gate Level Verilog

Structural Verilog • Using built-in primitives • Net types & drive strengths • UDPs Gate, net & path delays • Specify blocks • Smart paths • Pulse rejection • Cell library modelling


Background • Who is SystemVerilog for? • Current status of SystemVerilog • RTL enhancements • Interfaces • Assertions • Testbenches • C interface

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