Lego-NXTAn Introduction

Presented by:

David FernándezCarlota MartelJosé Manuel Gómez

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Table of Contents

• Introduction to Lego Mindstorms

• Programming in a Graphical Environment:

• NXT-G

• Programming in a Textual Environment:

• NXC

-Introduction toLego Mindstorms-

Programmable robotics toys

Evolution

http://www.flickr.com/photos/55524309@N05/5377715421

First steps

• MIT & Lego

• Investigations on how children learn

• MIT Programmable Brick

• Symour Papert

First steps• Design

• Easy for new users and powerful for the “experts”

• Many diferent shapes

• Simplicity

• Black box

• Learn how to program

• Observe the children in the lab

RCX (1998)

• 8-bit microcontroller

• 32K of RAM

• IR communication

• 3 sensor input ports

• 3 motor output ports

• Display

• RCXCode / Robolab

Image: Wikimedia Commons

NXT (2006)

Image: Wikimedia Commons

• Replaces RCX

• Firmware (OSS)

• SDK, HDK, BDK

• 4 sensors

• 3 motors

• LCD display

• NXT-G

NXT 2.0 (2009)

• Same brick as 1.0

• Sound editor

• Image editor

• 1 Color Sensor RGB

• 2 Touch sensors

• 1 Ultrasonic sensor

• 3 servo motors

• Bluetooth communication

Hardware

The brick

Lego Mindstorms NXT Hardware Developer Kit

Sensors

Touch

Light

Ultrasound

Sound

Education

http://www.flickr.com/photos/ianus/279779053/

• Robotics

• Programming

• Concurrency

• AI

VISUAL

http://www.flickr.com/photos/tambako/2473970479/

Projects

http://www.flickr.com/photos/sk8geek/4636413499

Electric Guitar

http://www.nxtprograms.com/guitar/index.html

Ball Hunter

http://www.nxtprograms.com/guitar/index.html

Competitions

• Robot Game

• Acomplish missions

• Project

• Explore a real problem

• Develope an inovative solution

Programming environments

Some of them

• Ada

• NXT-G

• RobotC

• leJOS NXJ

• MATLAB

• BricxCC

• NXTGCC

• ruby-nxt

• Robotics.NXT

• ...

Some of them

• Ada

• NXT-G

• RobotC

• leJOS NXJ

• MATLAB

• BricxCC

• NXTGCC

• ruby-nxt

• Robotics.NXT

• ...

Some of them

• Ada

• NXT-G

• RobotC

• leJOS NXJ

• MATLAB

• BricxCC

• NXTGCC

• ruby-nxt

• Robotics.NXT

• ...

-Programming in a Graphical Environment-

Workspace

6

7

8

9

1

23

4

5

Common Blocks

DEMO

-Programming in a Textual Environment-

NXC

Bricx Command Center

Bricx Command Center

Bricx Command Center

Bricx Command Center

NBC

Variables

Control Elements

Tasks, subroutines and macros

Subroutines (ii)

Accessing to the sensors

Controlling the Servo motors (i)

Controlling the Servo motors (ii)

Parallelism (i)

Parallelism (ii)

Communication (i)

Communication (ii)

Making some music (i)

Making some music (ii)

Bricx Command Center

NXT-G vs. NXC

Features NXT-G NXC

Language

Advantage

Speed (loops/min)

Memory (bytes)

Graphic Not eXactly C

Write programs fast

Write fast programs

762 4285

10704 1428

Questions?

http://www.flickr.com/photos/wwworks/4759535950/

http://campusvirtual.uem.es IT-Seminar

http://www.slideshare.net/davidfm