How to define Verilog modules, declare ports, instantiate modules with named connections and parameters, build a hierarchy, and use generate for repeated instances.
Author: Raju Gorla
Every Verilog operator with examples: bitwise vs logical vs reduction, shifts, concatenation, precedence, expression width, signed arithmetic and what each operator synthesises to.
Verilog data types explained: the four values, nets vs variables, wire vs reg, vectors and part selects, signed types, integer and real, arrays and memories, and implicit nets.
Verilog’s basic syntax rules in one place: comments, identifiers, keywords, sized and unsized numbers, x and z values, strings and the mistakes beginners make most.
What Verilog is, how Verilog code becomes a chip, a short history, Verilog vs VHDL vs SystemVerilog, free tools to start with, and a learning path.
The design patterns that matter in SystemVerilog testbenches: factory, callbacks, observer, configuration objects, singleton and strategy, with examples and best practices.
SystemVerilog DPI explained with examples: importing C functions, exporting SystemVerilog tasks to C, context tasks, type mapping with svdpi.h, and using C++ and Python through DPI.
How to build a layered, self-checking SystemVerilog testbench: generator, driver, monitor, reference model, scoreboard and coverage, with code, debugging tips and the mapping to UVM.
How to write functional coverage in SystemVerilog: covergroups, coverpoints, bins, crosses, transition coverage, cover properties, where to sample and how to close coverage.
SystemVerilog assertions explained with a waveform: immediate vs concurrent, implication, sequences, $rose, $stable and $past, assert vs assume vs cover, formal verification and assertions worth adding to every design.