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Example Codes

A language cannot be just learn by reading a few tutorials.Its best learn when you try out new things.And for beginners I have written some basic as well as little bit advanced codes.Most of the posts have both the design and a testbench to verify the functionality of the design.Copy these codes and run them.Experiment with the codes and see how its working.Best Of Luck.

Just browse through some of the codes:

VHDL codes for common Combinational Circuits:

3 bit Magnitude Comparator Using logic gates

4 : 1 Multiplexer using case statements

1 : 4 Demultiplexer using case statements

4 bit comparator with testbench

4 bit Ripple Carry Adder using basic gates

3 : 8 Decoder using basic logic gates

VHDL codes for common Sequential Circuits:

Positive edge triggered JK flip-flop with reset 4-bit Synchronous UP counter using JK FF

PISO Using flip flops - Generate statement Johnson Counter using flip flops - Generate statement

4 bit Johnson Counter - Behavior Model 4 bit Ring Counter - Behavior Model

Example for Gate and Behavior level modeling

Asynchronous D flip flop - Behavior model

Synchronous D flip flop - Behavior model

Some more codes are available here:

Resettable counter with testbench program

A programmable delay generator

BCD to 7-segement display decoder

Cyclic Reduntancy Check(CRC) Generator

Illustration of cloaked for loop by example

Usage of components in your design with example

Basic model for a FIFO Queue

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Usage of "GENERIC" in VHDL using PISO example

Digital Clock in VHDL

Sine wave Generator

Function for division of unsigned numbers

Function for finding Square root of a number

Function for Matrix multiplication

Random number generator using PRSG

Keep checking this space for more example codes.If you think some thing is missing here request those examples to work on your requests as soon as possible.

Some of the codes and testbench programs can be downloaded from here.

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