7-Segment Dice

//(Diagram to follow)

/*

Basic 7-seg LED dice

Generates a random integer between 0 and 6,
then outputs it to an HDSP-C3G3 7 segment display every 5 seconds.

Kate A. Glover – kateglover@gmail.com
*/

/* This matches up each lettered pin-out on the 7-seg display
with a given port number on the Arduino Uno*/

int a = 2;
int b = 3;
int c = 4;
int d = 5;
int e = 6;
int f = 7;
int g = 8;

void setup() {
// initialize each digital pin as an output.

pinMode(a, OUTPUT);
pinMode(b, OUTPUT);
pinMode(c, OUTPUT);
pinMode(d, OUTPUT);
pinMode(e, OUTPUT);
pinMode(f, OUTPUT);
pinMode(g, OUTPUT);

}

// loops to produce a number every 5 seconds (5000 milliseconds)
void loop()
{

//creates an int from a number returned by the generateNumber() method.
int randNo = generateNumber();

//calls a different method depending on which number was generated
switch (randNo)
{

case 1:

displayOne();
break;

case 2:

displayTwo();
break;

case 3:

displayThree();
break;

case 4:

displayFour();
break;

case 5:

displayFive();
break;

case 6:

displaySix();
break;

/* this default calls a method which displays an “E” (for error)
and only shows when a number is called which is out of range. */

default:

displayFault();
break;

}
//5000 millisecond (5 second) delay before it calls another number

delay(5000);

}

//generates the random number and returns it to the main loop() method.
int generateNumber()
{

randomSeed(analogRead(0));
int randomNumber = random(1, 6);
return randomNumber;

}

// Fires up pins to create a number 1 and shuts off the other pins
void displayOne()
{

digitalWrite(a, LOW);
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, LOW);
digitalWrite(g, LOW);

}

// Fires up pins to create a number 2 and shuts off the other pins
void displayTwo()
{

digitalWrite(a, HIGH);
digitalWrite(b, HIGH);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, LOW);
digitalWrite(g, HIGH);

}

// Fires up pins to create a number 3 and shuts off the other pins
void displayThree()
{

digitalWrite(a, HIGH);
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, LOW);
digitalWrite(f, LOW);
digitalWrite(g, HIGH);

}

// and so on and so forth
void displayFour()
{

digitalWrite(a, LOW);
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);

}

// You get the idea
void displayFive()
{

digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(c, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, LOW);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);

}

// … and six…
void displaySix()
{

digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(c, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);

}

// Sets the display to show an E (for error)
void displayFault()
{

digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);

}

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