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Learning C for Arduino

By : Omar Faruk Towaha

2.9 (8)

Learning C for Arduino

2.9 (8)

By: Omar Faruk Towaha

Overview of this book

This book will start with the fundamentals of C programming and programming topics, such data types, functions, decision making, program loops, pointers, and structures, with the help of an Arduino board. Then you will get acquainted with Arduino interactions with sensors, LEDs, and autonomous systems and setting up the Arduino environment. Moving on you will also learn how to work on the digital and analog I/O, establish serial communications with autonomous systems, and integrate with electronic devices. By the end of the book, you will be able to make basic projects such as LED cube and smart weather system that leverages C.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started

1. Getting Started

Arduino

Exploring Arduino Uno

Downloading and installing Arduino IDE

Explore Arduino IDE

Summary

2. Our First Program!

2. Our First Program!

Connecting your Arduino

Hello Arduino!

Things to remember

Summary

3. Exploring C with Arduino IDE

3. Exploring C with Arduino IDE

Variables

Data types

Collecting and showing data through serial port

Strings and operations with strings

Summary

4. Blinking with Operations and Loops

4. Blinking with Operations and Loops

Expression in C

Logical operators

Exercises

Loops

Exercise

Summary

5. Functions and Files with Arduino

5. Functions and Files with Arduino

Functions

Data logging

Connecting an SD card to your Arduino

Writing on a file

Summary

6. Arduino and C++

6. Arduino and C++

Object Oriented Programming

Going deeper into class

Understanding OOP better

Fundamentals of OOP

GSM modules

Arduino library

Making a call using GSM module

Sending an SMS

Receiving an SMS

Summary

7. Using Pointers and Structure

7. Using Pointers and Structure

Pointers

Pointers and arrays

Usages of pointers

Learning about structure

Structure and function

Nested structure

Exercise

Summary

8. Working with Arduino Libraries

8. Working with Arduino Libraries

Arduino library

The Firmata library

The SoftwareSerial library

Uses of LiquidCrystal Library

Installing a library

Removing a library

Creating our own library

Summary

9. Lets Build Something Awesome

9. Lets Build Something Awesome

LED cube

Smart weather system

Home security

Summary

10. Few Error Handlings

10. Few Error Handlings

Few common errors

Auto-reset

Bootloader

java.lang.StackOverflowError

Arduino software freeze when I try to upload a program

Board doesn't turn on (the green power LED doesn't light up)

Get an error when launching arduino.exe on Windows

Could not find the main class

Cygwin conflicts on Windows

Tools | Serial Port menu is not visible

Sketch appear to upload successfully but not do anything

Undeclared functions or undeclared types error

Invalid device signature when trying to upload a sketch

'xxx' does not name a type error

Library is not Installed properly

Wrong folder location

Library dependencies

Wrong library name

Wrong folder name

Forgot to close the Arduino IDE

Check your hardware connections

Check the coding syntax error

Use serial monitor

Stay connected with the Arduino forum

Summary

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Pointers and arrays

Pointers not only store the addresses of the variables; they also hold the address of a cell of an array. Look at the following code:

void setup() { 
  int myVar[5] = {1, 3, 5, 6, 8}; 
  int *myPointer; 
  myPointer = &myVar[0]; 
// &myVar[0] is the address of the 1st element of myVar[5] 
}

Say we need to print the third element of our array. In the preceding code, myPointer holds the value of the first element of our array. So, to access the third element, we need to increment our pointer by 2, as follows:

myPointer = myPointer+2;

Now, if we print myPointer value, we will get the third element of our array. Let's look at what our program and output will be for that case:

void setup() { 
  int *myPointer; 
  int myVar[5] = {1, 3, 5, 6, 8}; 
  myPointer = &myVar[0]; // Holds the address of the 1st element.  
  myPointer = myPointer + 2;  
// Incremented by 2 to get 3rd value of our array.  
  Serial...

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