Syntax

The setup() and loop() Functions in Arduino Programming

samteck Arduino Basic Guide , , 0 Comment
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As we have seen in Basic Structure for Arduino that there are 2 basic functions in an Arduino Program.

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setup()

The setup() function is called once when your program starts. Use it to initialize pin modes, or begin serial. It must be included in a program even if there are no statements to run.

void setup()
{
pinMode(pin, OUTPUT);      // sets the ‘pin’ as output
}

 loop()

After calling the setup() function, the loop() function does precisely what its name suggests, and loops consecutively, allowing the program to change, respond, and control the Arduino board.

void loop()
{
digitalWrite(pin, HIGH);   // turns ‘pin’ on
delay(1000);               // pauses for one second
digitalWrite(pin, LOW);    // turns ‘pin’ off
delay(1000);               // pauses for one second
}

By using these 2 functions you can create any Arduino Program.

Basic Structure of Arduino Programming | Setup & Loop Function

samteck Arduino Basic Guide , , 0 Comment
Basic Structure of Arduino Programming | Setup & Loop Function

The basic structure of the Arduino programming language is predefined and fairly simple. It runs in at least two parts. These two required parts, or functions, enclose blocks of statements.

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This is Basic Structure of Every Arduino Program

void setup()
{
statements;
}void loop()
{
statements;
}

Where setup() is the preparation, loop() is the execution. Both functions are required for the program to work.

The setup function should follow the declaration of any variables at the very beginning of the program. It is the first function to run in the program, is run only once, and is used to set pinMode or initialize serial communication.

The loop function follows next and includes the code to be executed continuously – reading inputs, triggering outputs, etc. This function is the core of all Arduino programs and does the bulk of the work.

So this is the primitive or basic structure of an Arduino Program.