Verilog is a hardware description language (HDL), intended to describe the behavior and/or architecture of a numerical system; in other words a combinatorial or sequential logic function.
A numerical system can be described, at different levels, depending on the aspects that interest you. Thus, an HDL can describe, at the switch level, the location of connection paths (wires), resistors, and transistors on an integrated circuit.
The HDL language can describe the numerical system considering the logic gates and the bistable components, ie, at the gates level.
At a higher level, the numerical system can be described in terms of information vector transfers between registers. This represents the Register Transfer Level (RTL)/Data Flow Level. Verilog language supports all these levels.
The programming language is used in computer-aided design (CAO) of integrated circuits (eg, ASIC) or for configuring FPGAs.
Verilog has a syntax similar to that of C language.
Verilog was launched in 1985 by Gateway System Corporation, which was taken over by Cadence Design Systems, Inc. Until 1990 when Open Verilog International (OVI) came into being, HDL Verilog was owned by Cadence. Later, Cadence placed Verilog in the Public Domain. The IEEE standard for Verilog was published in 1995.
Visual Basic (VB) is a programming language produced by Microsoft, which was derived from the Basic language.
VB is popular because of the graphical interface it uses; its interface is relatively simple compared to other languages.
Visual Basic is part of Microsoft’s Visual Studio package and, like Microsoft’s other ‘visual’ languages, is focused on the interface component of the program, as the programmer can easily create standardized Windows-type interfaces (windows, buttons, lists). etc.) without the need to write code for this. Visual Basic has a library of visual components (lists, calendars, menus, etc.) whose components (graphical and functional) are already implemented, allowing the programmer to introduce and use own components or made by other programmers.
Visual Basic is a pure object-oriented (OO) language, having already implemented a list of general-use classes. Up to version 6, VB could use and develop COM / COM + and ActiveX components as well as classic libraries of DLL functions. With the advent of version 7, ie, with the advent of .NET technology, VB (now VB .NET) can use and create .NET components with all the benefits they bring. VB is a high-level language having implemented several levels of application development abstraction but also the ability to compile in Windows EXE format or 16 and 32 bit DLL.
VB is an interpreted language, that is, any code written in the VB language must first be translated into a lower-level language and then executed. This has advantages, such as running without compilation or portability between platforms, but also disadvantages, such as the need for a virtual machine for code interpretation.
One of the strengths of VB language is that complex applications can be made in a relatively short time and relatively simple dedicated computer systems such as databases can be used – VB can use all known database management systems, directly or through the ODBC.
The use of VB language is a general one, which can be used in the creation of simple, educational programs but also in the creation of complex applications. Theoretically, anyone more or less experienced can use VB because it is a simple programming language.