James Floyd Kelly - Lego Mindstorms Nxt-G Programming Guide.pdf

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LEGO ® MINDSTORMS ®
NXT-G Programming
Guide
■■■
James Floyd Kelly
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LEGO ® MINDSTORMS ® NXT-G Programming Guide
Copyright © 2007 by James Floyd Kelly
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-59059-871-9
ISBN-10 (pbk): 1-59059-871-7
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For Dan, Belle, Sarah, and Jake—my “Texas family”
Contents at a Glance
About the Author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
■ CHAPTER 1
Robots and Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
■ CHAPTER 2
Program Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
■ CHAPTER 3
Hello World! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
■ CHAPTER 4
Get Movin’. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
■ CHAPTER 5
Record and Play Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
■ CHAPTER 6
Make Some Noise! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
■ CHAPTER 7
Wired! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
■ CHAPTER 8
True or False? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
■ CHAPTER 9
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
■ CHAPTER 10
Wait for It!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
■ CHAPTER 11
Round and Round . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
■ CHAPTER 12
Decisions, Decisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
■ CHAPTER 13
Stop It . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
■ CHAPTER 14
Pick a Card, Any Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
■ CHAPTER 15
Apples and Oranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
■ CHAPTER 16
Inside or Out? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
■ CHAPTER 17
Yes? No? Maybe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
■ CHAPTER 18
Title = Anything You Like . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
■ CHAPTER 19
Basic Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
■ CHAPTER 20
Basic Math . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
■ CHAPTER 21
Staying Alive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
iv
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