Computer Engineering Activities Interfacing Music Box Project ACSE 2004

1
Computer Engineering ActivitiesInterfacingMusic
Box ProjectACSE 2004

• Graham Smyth

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Computer Engineering Units

• Grade 10/11/12
• 1. Hardware
• 2. Networking
• 3. Integrated Circuits
• 4. Programming
• 5. Interfaces

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Interfacing Activities

• Grade 10
• One bit
• Three LEDs
• LED simulators
• ASCII
• Binary counting
• Light patterns
• Intersections
• AC ???

• Grade 11
• One bit
• One byte
• DC motor
• Bi-directional
• LED traffic light
• LED intersection
• Demultiplexer
• GUIs
• Mouse control
• AC ??

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Interfacing Activities

• Grade 12
• One byte
• LED intersection
• Stop Lights AC?
• Vehicles
• Security systems
• Drag strips
• Music Box
• Latches
• Marquees
• GUIs/Mouse Control

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Introduction to Traffic Lights
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Traffic Lights
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Traffic Lights
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Introduction to Motors
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Motors
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Introduction to Music
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Music Box
Note indicator Light
Note push button
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Music Pipe Organ
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Breadboard Connections
Connected
High Fives
Divider
Low Fives
Connected
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Music Box Software
Turing

• parallelput(number) - reads 8 pins
• put parallelget - reads 5 pins
• mousewhere(x,y,click)
• play(CDEFG)
• drawline(x1,y1,x2,y2,red)
• FREE!!!

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Interfacing System Unit 5
Computer Interface Peripheral

• Parallelport

• Wires
• ICs
• Resistors
• Capacitors
• Transistors

• LED's
• Motors
• Lights
• Robots
• Music Box
• Joysticks

Wires
Wires
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Music Box Hardware

• Five male pins
• One D sub connector
• Cable 1 D sub to Breadboard
• Four N.O. pushbuttons
• Four Resistors (Brown/Black/Orange)
• One Breadboard
• Extra wire
• Enhancement hardware ????

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Music Box Hardware - Resistor(Four Required)
1 0 X 103
Brown Black
Orange Gold
Tolerance -5
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Resistor Chart
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Music Box Hardware Cable D sub to Breadboard
Male Pin
Insulated Wire
Small Crimp Tab
Stripped Wire
Large Crimp Tab
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3 Pair Cable
White/Green Green/ White Orange/
White White/Orange Blue/ White White/ Blue
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Cable with Male Pins
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Music Box HardwareNormally Open Switch
Schematic
Physical
1
1
2
2
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Inputting Data
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Music Box Hardware Parallelport
Input I0 I3
Output D0 D7
13 12 11 10 9 8 7 6
5 4 3 2 1
25 24 23 22 21 20 19 18 17
16 15 14
Input I4
Grounds 18 - 25
View from back of Computer
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D Sub Connector /Harness
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D Sub Connector Colour Code
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D Sub Connector
Pin 10
Pin 2
D sub Connector
Pin 18
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D Sub Connector
Pin 2
Check
Bottom, 2 Down
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D Sub Connector
Check
Pin 2, Bottom, 2 Down
Pin 18, Top, 5 Down
Pin 10, Bottom, 10 Down
Pin 11
Pin 12
Pin 13
Total of six wires from D sub connector
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Breadboard
Switches Span Divider
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Breadboard with Resistors
Resistors to Top Rail
Brown/Black/Orange
Align
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D Sub to Breadboard Cable
To Pin 2 White/Green
Four Wires
To Pin18 White/Blue
Switch to Ground
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D Sub to Breadboard Cable
Pin 10 Green/ White
Pin 11 Orange/ White
Pin 12 White/Orange
Pin 13 Blue/ White
Pin 2 White/Green
Pin18 White/Blue
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The hardware is complete. Now to the software
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Music Box Software Assignment 1
Write a program that will continuously scan for
input values from the MUSIC BOX.
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Music Box SoftwareAssignment 1
parallelput(1) loop Start of infinite loop.
put parallelget Returns input pin
values. end loop End of loop.
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Music Box Note Matrix
Remember these Numbers
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Music Box Software Assignment 2
Write a program that will play the notes CDEG
each as quarter notes.
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Music Box Software Assignment 2
parallelput(1) var value int loop value
parallelget if value ______ then play
(C) elsif value _____ then play
(D) Etc Save as MusicBox2
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Music Box Software Assignment 3
Write a program that will play the notes CDEG
each as quarter notes and at the same time
display a GUI representing the played notes.
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Adding Graphics Screen
(640,400)
(0,0)
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Music Box Software Assignment 3 A GUI part 1

• locatexy (300, 300)
• put "MUSIC BOX PLAYER"
• locatexy (200, 140)
• put "C D E G"
• drawing 4 circles with perimeter black
• drawoval (200, 200, 40, 40, black)
• drawoval (300, 200, 40, 40, black)
• drawoval (400, 200, 40, 40, black)
• drawoval (500, 200, 40, 40, black)

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Music Box Software Assignment 3 A GUI part 2

• filling 4 circles with white
• drawfilloval (200, 200, 40, 40, white, black)
• drawfilloval (300, 200, 40, 40, white, black)
• drawfilloval (400, 200, 40, 40, white, black)
• drawfilloval (500, 200, 40, 40, white, black)

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Music Box Software Assignment 3 A GUI part 3

• parallelput(1)
• var value int
• loop
• value parallelget
• if value ______ then
• fills C GUI with red
• drawfilloval (200, 200, 40, 40, red, black)
• plays C for a quarter note
• play C
• sets C GUI back to white
• drawfilloval (200, 200, 40, 40, white, black)

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Music Box Software Assignment 3 A GUI part 4

• elsif value _____ then
• fills D GUI with red
• drawfilloval (300, 200, 40, 40, red, black)
• play D
• sets D GUI back to white
• drawfilloval (300, 200, 40, 40, white, black)
• Similarly for notes E and G

Save as MusicBox3
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Music Box Tune

• Mary Had a Little

Mary had a little lamb E D C D E E E
rest Little lamb D D D rest Little lamb E G
G rest Mary had a little lamb E D C D E
E E rest Whose fleece was white as snow E
D D E D C
Save as MusicBox4
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Music Theory

• play (8CDEFGABgtC) plays one octave of 8th
  notes from middle C
• play(ltBAGFEDC) plays scale in reverse in 8th
  notes if it follows previous line
• play (gt4CDEFGAB) plays one octave of quarter
  notes one octave up from middle C
• play ("gt6CpCpC-") plays one octave up from
  middle C, a C 16th note, a rest, C sharp, a rest,
  and a C flat
• play(1C2C4C6C) plays whole, half, quarter,
  and 16th C note

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Music Box Software Assignment 4

• Write a program that will
• play a tune
• display a GUI of the notes being played
• change the colour of the note name.

Save as MusicBox5
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Music Box Software Assignment 5
Write a program that will automatically play
Mary Had a Little Lamb.
Save as MusicBox6
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Additional Music Box Software

• Additions
• Add an LED above each key on the keyboard
• Add additional keys to the keyboard
• Store a tune
• Test a users ability to replay the tune

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More Hands-On Activities

• Keyboard
• Intersection
• Robot
• Worlds Largest Joystick

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Addresses
smythel_at_mnsi.net www.classictechnology.ca www.ho
ltsoft.com