Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Arduino Development Cookbook

You're reading from   Arduino Development Cookbook Over 50 hands-on recipes to quickly build and understand Arduino projects, from the simplest to the most extraordinary

Arrow left icon
Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781783982943
Length 246 pages
Edition 1st Edition
Tools
Concepts
Arrow right icon
Author (1):
Arrow left icon
Cornel M Amariei Cornel M Amariei
Author Profile Icon Cornel M Amariei
Cornel M Amariei
Arrow right icon
View More author details
Toc

Table of Contents (11) Chapters Close

Preface 1. Power on – Arduino Basics FREE CHAPTER 2. Blinking LEDs 3. Working with Buttons 4. Sensors 5. Motor Control 6. More Output Devices 7. Digital Communication with Arduino 8. Hacking A. Electronics – the Basics Index

Timing Arduino code


This is a quick and very helpful recipe. There are several time-sensitive applications on the Arduino, and sometimes we need to find the speed at which the Arduino executes various commands. Here we have a simple implementation that will tell us how much time it takes to set a digital pin at HIGH and LOW 10,000 times.

Getting ready

For this recipe, we require an Arduino board connected to a computer via USB.

How to do it…

We just need to write the following code:

// Variable to hold the passed time
unsigned long time = 0;
int pin = 3; // Declare a pin

void setup(){ 
  Serial.begin(115200); // High speed Serial 
  pinMode(pin, OUTPUT); 
}

void loop(){
  // Get current time
  time = micros();
  
  // Code to be tested for execution time
  for (int i = 0; i< 10000; i++){
    digitalWrite(pin, HIGH);
    digitalWrite(pin, LOW);
  }
  // Find the passed time and print it
  Serial.println(micros() - time);
}

How it works…

The micros() function returns the number of microseconds...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime