I’m from Norway, but I live in Bangkok, Thailand. Before I started VHDLwhiz, I worked as an FPGA engineer in the defense industry. I earned my master’s degree in informatics at the University of Oslo.
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How to use a procedure in VHDL
A procedure is a type of subprogram in VHDL which can help us avoid repeating code. Sometimes the need arises to perform identical operations several places throughout the design. While creating a module might be overkill for minor operations, a procedure is often what you want. Procedures can be declared within any declarative region. The…
How to stop simulation in a VHDL testbench
How do you stop the VHDL simulator when the simulation is complete? There are several ways to do that. In this article, we will examine the most common ways to end a successful testbench run. The VHDL code presented here is universal, and it should work in any capable VHDL simulator. For the methods involving…
BMP file bitmap image read using TEXTIO
Converting the image file to a bitmap format makes for the easiest way to read a picture using VHDL. Support for the BMP raster graphics image file format is built into the Microsoft Windows operating system. That makes BMP a suitable image format for storing photos for use in VHDL testbenches. In this article, you…
Basic VHDL quiz – Part 1
Put your skills to the test with this quiz with questions from the first part of the Basic VHDL Tutorial series.
How to create a list of strings in VHDL
Text strings in VHDL are generally limited to fixed-length character arrays. That makes sense because VHDL describes hardware, and generic-length strings require dynamic memory. To define an array of strings, you have to allocate space at compile-time for the highest number of strings you want to store. Even worse, you must decide on the strings’…
How to use constants and Generic Map in VHDL
Creating modules is a great way to reuse code, but often you need the same module with smaller variations throughout your design. This is what generics and the generic map are for. It allows you to make certain parts of the module configurable at compile-time. Constants are used when we want to avoid typing the…
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