VHDL Code of OR Gate using Dataflow model | RTL Diagram , Simulation Code, Test Bench, Waveform | VHDL Complete Tutorial by TechWithCode

VHDL Code of OR Gate using Dataflow model:-  In this article, We will provide you  VHDL Code of OR gate using Dataflow modeling With Full Explanation.

To Understand the VHDL code of OR gate, We need to know some basic things which are explained below.

What is OR gate

when any input is SET the output is SET otherwise RESET.

Boolean Expression of OR gate

out = A + B

Implementing OR gate using Dataflow Modelling:-

• we directly use gate-level-implementation in Dataflow modelling style
• To know more about DataFlow model, click here

Or gate 

VHDL code for RTL Diagram of OR gate :-

library IEEE; use IEEE.STD_LOGIC_1164.ALL; entity OR1_DF is Port ( A : in STD_LOGIC; B : in STD_LOGIC; C : out STD_LOGIC); end OR1_DF; architecture dataflow of OR1_DF is begin C<= A or B; end dataflow;

RTL Diagram of OR Gate:-

After executing the above code you will get following RTL Digram.

VHDL code for Simulation of OR Gate:-

library IEEE; use IEEE.STD_LOGIC_1164.ALL; entity OR_DF_TB is end OR_DF_TB; architecture DATAFLOW of OR_DF_TB is component OR1_DF is Port ( A : in STD_LOGIC; B : in STD_LOGIC; C : out STD_LOGIC); end component; signal A :std_logic :='0'; signal B :std_logic :='0'; signal C :std_logic; begin uut:OR1_DF port map (A=>A,B=>B,C=>C); stim_proc: process begin wait for 150ns; B <= '1'; wait for 150ns; A <= '1'; B <= '0'; wait for 150ns; B <= '1'; wait; end process; end DATAFLOW;

Waveform of FullAdder:-

After executing the above code you will get the following WaveForm.

To know how to write code in VHDL using DataFlow modelling style, please watch the following video.

          
Also Read:

1. How to write a VHDL Program in Dataflow Modelling Style

2. How to write a VHDL program in Behavioral Modelling Style

3. AND Gate code in VHDL using Dataflow Model |  RTL, Simulation ,TestBentch and Waveform 

4. Full adder in VHDL using Behavioral Model | RTL, Simulation ,TestBentch and Waveform 

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