Book Image

C Programming for Arduino

By : Julien Bayle
Book Image

C Programming for Arduino

By: Julien Bayle

Overview of this book

Physical computing allows us to build interactive physical systems by using software & hardware in order to sense and respond to the real world. C Programming for Arduino will show you how to harness powerful capabilities like sensing, feedbacks, programming and even wiring and developing your own autonomous systems. C Programming for Arduino contains everything you need to directly start wiring and coding your own electronic project. You'll learn C and how to code several types of firmware for your Arduino, and then move on to design small typical systems to understand how handling buttons, leds, LCD, network modules and much more. After running through C/C++ for the Arduino, you'll learn how to control your software by using real buttons and distance sensors and even discover how you can use your Arduino with the Processing framework so that they work in unison. Advanced coverage includes using Wi-Fi networks and batteries to make your Arduino-based hardware more mobile and flexible without wires. If you want to learn how to build your own electronic devices with powerful open-source technology, then this book is for you.
Table of Contents (21 chapters)
C Programming for Arduino
About the Author
About the Reviewers

Playing basic sound bits

Playing a sound requires a sound source and a speaker. Of course, it also requires a listener who is able to hear sounds.

Natively, Arduino is able to produce 8 kHz and 8-bit audio playback sounds on small PC speakers.

We are going to use the tone() function available natively in the Arduino Core. As written at, we have to take care of the pins used when using this function, because it will interfere with PWM output on pins 3 and 11 (except for the Arduino MEGA).

This technique is also named bit-banging. It is based on I/O pin toggling at a specific frequency.

Wiring the cheapest sound circuit

We are going to design the cheapest sound generator ever with a small 8-ohm speaker, a resistor, and an Arduino board.

A small sound generator

The connections made here ensure an audible sound. Let's program the chip now.

The corresponding circuit diagram is as follows:

The diagram of the sound generator

Playing random tones

As a digital artist and...