Adventures In Raspberry Pi E-Book

Carrie Anne Philbin

• Herausgeber: John Wiley & Sons
• Kategorie: Wissenschaft und neue Technologien
• Serie: Adventures In ...
• Sprache: Englisch

Seitenzahl: 266

Veröffentlichungsjahr: 2013

Beschreibung

Coding for kids is cool with Raspberry Pi and this elementary guide

Even if your kids don't have an ounce of computer geek in them, they can learn to code with Raspberry Pi and this wonderful book. Written for 11- to 15-year-olds and assuming no prior computing knowledge, this book uses the wildly successful, low-cost, credit-card-sized Raspberry Pi computer to explain fundamental computing concepts. Young people will enjoy going through the book's nine fun projects while they learn basic programming and system administration skills, starting with the very basics of how to plug in the board and turn it on.

Each project includes a lively and informative video to reinforce the lessons. It's perfect for young, eager self-learners—your kids can jump in, set up their Raspberry Pi, and go through the lessons on their own.

• Written by Carrie Anne Philbin, a high school teacher of computing who advises the U.K. government on the revised ICT Curriculum
• Teaches 11- to 15-year-olds programming and system administration skills using Raspberry Pi
• Features 9 fun projects accompanied by lively and helpful videos
• Raspberry Pi is a $35/£25 credit-card-sized computer created by the non-profit Raspberry Pi Foundation; over a million have been sold

Help your children have fun and learn computing skills at the same time with Adventures in Raspberry Pi.

Leseprobe

This edition first published 2014

© 2014 Carrie Anne Philbin

Registered office

John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, United Kingdom

For details of our global editorial offices, for customer services and for information about how to apply for permission to reuse the copyright material in this book please see our website at www.wiley.com.

The right of the author to be identified as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, except as permitted by the UK Copyright, Designs and Patents Act 1988, without the prior permission of the publisher.

Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books.

Designations used by companies to distinguish their products are often claimed as trademarks. All brand names and product names used in this book are trade names, service marks, trademarks or registered trademarks of their respective owners. The publisher is not associated with any product or vendor mentioned in this book. This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understanding that the publisher is not engaged in rendering professional services. If professional advice or other expert assistance is required, the services of a competent professional should be sought.

Trademarks: Wiley and the Wiley logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/ or its affiliates in the United States and/or other countries, and may not be used without written permission. Raspberry Pi is a registered trademark of Raspberry Pi Foundation. All other trademarks are the property of their respective owners. John Wiley & Sons, Ltd. is not associated with any product or vendor mentioned in the book.

A catalogue record for this book is available from the British Library.

ISBN 978-1-118-75125-1 (paperback); ISBN 978-1-118-75123-7 (ePub); ISBN 978-1-118-75122-0 (ePDF)

Set in 10/12.5 Chaparral Pro Light by Indianapolis Composition Services

Printed in the United Kingdom at Bell & Bain

For Mum & Dad—my best teachers.

Publisher’s Acknowledgements

Some of the people who helped bring this book to market include the following:

Editorial and Production

VP Consumer and Technology Publishing Director: Michelle Leete

Associate Director–Book Content Management: Martin Tribe

Associate Publisher: Chris Webb

Executive Commissioning Editor: Craig Smith

Development Editor: Sara Shlaer

Copy Editor: Grace Fairley

Technical Editor: David Whale

Editorial Manager: Jodi Jensen

Senior Project Editor: Sara Shlaer

Editorial Assistant: Anne Sullivan

Marketing

Associate Marketing Director: Louise Breinholt

Marketing Manager: Lorna Mein

Marketing Executive: Polly Thomas

Composition Services

Compositors: Jennifer Mayberry, Sarah Wright

Proofreader: Wordsmith Editorial

Indexer: Potomac Indexing, LLC

About the Author

Carrie Anne Philbin is a high school-level Computing and Google Certified Teacher and a member of the DfE Computing expert panel reviewing the new Computing School Curriculum in the UK. She is also the founder and presenter of the award winning Gurl Geek Diaries (www.geekgurldiaries.co.uk) and vice chair of the #include Computing At Schools initiative (http://casinclude.org.uk) to get more girls and minority groups into computing. Currently, Carrie Anne is working with the Raspberry Pi Foundation to improve the teaching of Computing in schools.

Acknowledgments

I would like to express my deep gratitude to the Raspberry Pi Foundation for allowing me to set my creativity free on their marvellous invention. In particular I’d like to thank Alex Bradbury and Dr Sam Aaron for their enthusiastic encouragement and patient guidance. Their willingness to give their time so generously is very much appreciated. I would also like to thank David Whale and the Raspberry Pi Community for their useful critiques of this work. Thanks to Jennifer Mayberry for her design work and Sarah Wright for much of the art.

Special thanks should also be given to the staff of Pimoroni for providing necessary equipment in order to complete elements of this book, as well as members of CAS #include and the Rainham Library Book Club, for keeping my progress on schedule with their kind words of encouragement.

My special thanks are also extended to my good friends: Emma, Sian, Helen, Viv, Lizi and Kylie who are a constant source of inspiration in my life.

Finally, I wish to thank my parents, brother and sister-in-law for their patience, support and encouragement throughout.

Adventures in Raspberry Pi®

Table of Contents

Introduction

What Is the Raspberry Pi and What Can You Do With It?

Who Should Read This Book?

What You Will Learn

What You Will Need for the Projects

How This Book Is Organised

The Companion Website

Conventions

Reaching Out

Adventure 1: You Have a Raspberry Pi. Now What?

What Hardware Do You Need?

What Other Equipment Is Helpful?

Setting Up the Raspberry Pi

Downloading and Copying the Raspbian Operating System

Plugging in the Hardware

Installing and Configuring the Software

Logging in to Your Raspberry Pi

Exploring the Desktop in Raspbian

Shutting Down Your Raspberry Pi

Backing up an SD Card Image

Adventure 2: Taking Command of Your Raspberry Pi

Exploring the Terminal

Commands for Navigating Through Your File System

Understanding sudo

Launching Programs from the Command Line

Managing Files and Directories

Installing and Updating Applications

Downloading and Installing Applications

Learning More About an Application

Upgrading Your Apps

Editing Files

Using Shutdown and Restart Commands

Continuing Your Text Adventure

Adventure 3: Creating Stories and Games with Scratch

etting Started with Scratch

The Scratch Interface

A Quick Hello from Scratch Cat

Setting the Stage

Creating Costumes and Original Sprites

Using the Scratch Sprite Image Library

Editing an Existing Sprite

Creating Your Own Original Sprites

Animating a Crazy Monkey

ating an Adventure Role-Playing Game

Creating Your Sprite and Stage

Setting the Start Position of the Adventurer Sprite

Creating Variables: Including Health Points for the Adventurer Sprite

Controlling the Direction and Movement of the Adventurer Sprite

Entering a Cave and Switching Backgrounds

Creating Health-Point-Stealing Sprites

roving the Movement of the Adventurer Sprite Using “if” Blocks

Creating a Game Over Screen

Ideas for Improvements to Your Game

Adventure 4: Programming Shapes with Turtle Graphics

Scratch Turtle Graphics

Using Pen Down and Pen Up

Drawing Simple Shapes

Using “clear” and Setting a Start Point

Using Variables Instead of Values

Changing the Size and Colour of the Pen

Creating Spiral Patterns

Using User Input to Determine the Number of Sides

Python Turtle Graphics

Introducing Python Modules

The IDLE Environment and the Interpreter Window

Using the Turtle Module in Python

The “range” Function

Other Python Turtle Module Commands

Some Super Spirals

Further Adventures with Python Turtle

Adventure 5: Programming with Python

Getting Set Up for Python

Python Programming Language

he IDLE Environment

Programming in Python: Using a Function

Using a Text Editor to Create a code File

Using the Python time and random Modules

Python Text Adventure Game

ing User Input

Using Conditionals

Using a while Loop

Using a Variable for Health Points

Putting It All Together

Defining Functions

Creating a Main Game Loop

Continuing Your Python Adventure

Adventure 6: Programming Minecraft Worlds on the Raspberry Pi

Downloading and Installing Minecraft

Minecraft Pi Controls

Your First Minecraft Pi Python Program

Using Coordinates in Minecraft Pi

Finding the Player’s Location

Changing the Player’s Location

Placing a Block

lacing Multiple Blocks

Creating a Diamond Transporter

Sharing and Cloning Minecraft Pi Programs

Further Adventures with Minecraft Pi

Adventure 7: Coding Music with Sonic Pi

Getting Started with Sonic Pi

Sonic Pi Interface

Creating Your First Sounds with Sonic Pi

winkle Twinkle Little Star

Repeating Lines in a Loop

First Electronic Track

Using Different Synthesizer Sounds

Creating a Surprising Tune

Using “rand” to Play Random Notes

Using Algorithms

Running Two Scripts at the Same Time

Using the Mouse to Control Sound

Further Adventures with Sonic Pi

Adventure 8: Using the GPIO Pins on the Raspberry Pi

sing a Raspberry Leaf Diagram

Electronic Basics

Using the Python Library to Control GPIO

Do You Have a Rev 1 or a Rev 2 Board?

Making an LED Blink

ting the LEDblink Python code

Connecting the LEDblink Components

Running LEDblink.py as the Super User root

Using a Button to Turn on an LED

ting the buttonLED Python code

Connecting the buttonLED Components

Running buttonLED.py as the Super User root

The Marshmallow Challenge

Creating the Marshmallow Button

Mapping Marshmallow Input to a Keyboard Key

tch Marshmallow Game

Further Adventures with GPIO Pins

Adventure 9: The Big Adventure: Building a Raspberry Pi Jukebox

An Overview of the Jukebox Project

What You Will Need

Part One: Creating the LCD Screen

Preparing the LCD Screen by Adding Headers

Mounting the LCD Screen and Wiring Up the Breadboard

Adding Scripts to Drive the LCD Screen

Part Two: Downloading and Playing MP3s

Installing a Media Player and Getting Music Files

Writing a Jukebox Python Program

Part Three: Controlling the Jukebox with Buttons

Connecting the Buttons

Adapting Your Jukebox Program to Include GPIO Buttons

Part Four: Displaying Jukebox Information on the LCD screen

Finishing Up

Appendix: Where to Go from Here

Glossary

Introduction

Are you an intrepid adventurer? Do you like to try new things and learn new skills? Would you like to be a pioneer in creating technology? Do you own a Raspberry Pi, or are you considering getting one? If the answer is a resounding “Yes!” then this is the book for you.

What Is the Raspberry Pi and What Can You Do With It?

The Raspberry Pi is a computer. A very small computer. In fact, it is roughly the size of a credit card. Don’t be fooled by its size; as we know, good things come in small packages. However, the Raspberry Pi does not come in a package at all. It does not come in a case (although you can build one, as discussed in Adventure 1) and its circuit board and chips are fully visible, as you can see in Figure 1. You can plug a Raspberry Pi into a digital TV or monitor and use a USB keyboard and mouse with it, making it very easy to use, and because of its size you can easily transport it anywhere.

The Raspberry Pi gives you the opportunity to build and control a device that does what you want it to do. For example, you can deploy your very own robot arm, controlled by a program that you have written. You can design and create your own role-playing game, or produce beautiful computer art or music, all by using code.