Creative Technology 9: Arduino Functions

What is the purpose of setting a pin to 'OUTPUT' in an LED context?

What does the function digitalRead(buttonPin) do?

Which of the following best describes the delay() function?

What does the 'const' keyword achieve when declaring a variable?

What are the three parts of a typical for loop in programming?

The keyword 'int' is primarily used to represent which type of data?

What happens when the condition in a for loop evaluates to false?

Which of the following would be an appropriate syntax for initializing a counter variable in a for loop?

What is the primary function of the setup() function in an Arduino sketch?

In what scenario does the loop() function terminate its execution?

What does the pinMode() function achieve when a pin is configured to INPUT?

Which statement correctly describes the function of OUTPUT mode in pinMode()?

Which of the following best describes the role of the delay() function within the loop() function?

What happens when a digital pin is set to OUTPUT mode and the command digitalWrite(pin, HIGH) is executed?

Why is it necessary to include the pinMode() function at the beginning of a sketch?

How many times does the setup() function execute during the normal operation of an Arduino program?

Setup Function

setup() runs once when the microcontroller starts or resets, used for initial configurations.
Ideal for configuring pin modes, setting up serial communication, timers, and other hardware setup tasks.

Example syntax:

void setup() {
    pinMode(ledPin, OUTPUT);
    pinMode(buttonPin, INPUT);
}

Loop Function

loop() is executed continuously after setup() is complete.
Contains primary code logic and runs indefinitely until power off or reset.

Example syntax:

void loop() {
    digitalWrite(ledPin, HIGH); 
    delay(1000);
    digitalWrite(ledPin, LOW);  
    delay(1000);
}

pinMode() Function

pinMode(pin, mode) configures the mode of a digital pin (e.g., INPUT or OUTPUT).
INPUT allows for reading external signals; OUTPUT allows for sending signals to components.
For OUTPUT pins, digitalWrite(pin, HIGH) turns the pin on, while digitalWrite(pin, LOW) turns it off.
For INPUT pins, digitalRead(pin) reads the state of connected signals.

delay() Function

delay(ms) introduces a pause in code execution for the specified time in milliseconds.
During a delay, the microcontroller does not perform any tasks.

Variables: int and const

int represents whole numbers (positive and negative), used for counting and arithmetic operations.
const keyword declares a constant, which is a value that cannot be altered after assignment, providing stability in code.

for() Loop

A control structure to repeat code a specific number of times, best for known iterations.
Consists of three parts: Initialization (setting a counter variable), Condition (determining loop continuation), and Update (modifying the counter).

Example syntax:

for(initialization; condition; update) {
    // code to be executed
}

Initializes counter variable, e.g., int i = 1.

Explore the setup() function in Arduino programming in this quiz tailored for Creative Technology 9. Learn about its role in initializing configurations and preparing the microcontroller for operation. Test your understanding of basic C++ commands and their application in Arduino.