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Step 9The Code
The Arduino Sketch is below and attached:
/* Interactive Pong Table - by Rohit Kabra
/* Interactive Pong Table - by Rohit Kabra
Following is the code for an interactive pong table I designed for a class called Making Things Interact at Carnegie Mellon University.
The table was built to change the game of Beer Pong (Beirut) so that the table reacts to the current state of the game.
A 3'x8' table was built that housed holes for 6 cups on either end. The following code controls only one side (6 cups).
Force Sensitive Resistors were mounted underneath each cup and wired to an Arduino.
The program below tells whether or not there is a cup on the resistor and depnding on how many cups have been removed a series of RGB LEDs change color.
The RESET button is especially curious as it is just the top cup on the table pressed down a little harder.
*/
int fsrCup0 = 0; //force sensitive resitor for top cup
int fsrCup1 = 1; //fsr for middle left cup
int fsrCup2 = 2; //fsr for middle right cup
int fsrCup3 = 3; //fsr for bottom left cup
int fsrCup4 = 4; //fsr for bottom middle cup
int fsrCup5 = 5; //fsr for bottom right cup
//the 6 force sensitive resistors are controlled by analog pins 0-5.
//the following array will hold the input of the 6 sensors
int myCups [] = {0,1,2,3,4,5};
boolean isCupHit [] = {false, false, false, false, false, false}; //array that tells whether cup has been removed or not
int numberOfCupsHit = 0; //a variable that tells the program how many cups have been removed from the table
int redLED = 3; //all red's of the RGB LEDS controlled by pin 3
int greenLED = 5; //all greens's of the RGB LEDS controlled by pin 5
int blueLED = 9; //all blue's of the RGB LEDS controlled by pin 9
int redValue; //the current value of the red LED's, helps to change colors
int blueValue; //the current value of the blue LED's, helps to change colors
int greenValue; //the current value of the green LED's, helps to change colors
void setup()
{
pinMode(redLED, OUTPUT); //initiated the red LEDs as outputs
pinMode(greenLED, OUTPUT); //initiated the green LEDs as outputs
pinMode(blueLED, OUTPUT); //initiated the blue LEDs as outputs
Serial.begin(9600); //starts up the sketch
}
void loop()
{
if(analogRead(myCups[0]>>1100)) reset(); //if the top cup is pushed down the program resets, and lights go back to initial state
for(int x = 0; x <= 5; x++)
{
Serial.print (analogRead(myCups[x])); //a print out of the 6 cups pressure for testing purposes
Serial.print("\t");
if(isCupHit[x] == false) //checks to make sure only looping through cups that have NOT been hit
{
if(analogRead(myCups[x])>300) //checks cup's fsr, if cup has been removed then force should drop below 300
{
numberOfCupsHit++; //adds 1 to total number of cups hit thus far in the game
interact(numberOfCupsHit); //run the method interact with the specific number of cups hit
isCupHit[x] = true; //makes sure the cup that was just hit isnt checked again for being hit or not
}
}
}
Serial.println();//space the testing printouts
}
//the interact method is meant to act like a finite state machine. With each cup initing a different state of the lights.
void interact(int state)
{
//state 1 - after first cup is hit
//color will fade into bluish green as the bar moves
if (state == 1)
{
blueValue = 255; //sets starting values of blues
greenValue = 0; //sets starting value of greens
for(int x = 0; x <= 125 ; x++)
{
analogWrite(blueLED, blueValue--); //fades out blue to desired brightness
analogWrite(redLED, 0); //sets value of red input to 0 or no red
analogWrite(greenLED, greenValue++); //fades green to desired brightness
delay(10);
}
}
//state 2 - after second cup is hit
//color will fade into green as the bar moves
if (state == 2)
{
blueValue = 125; //sets starting value of blues before fading
greenValue = 125; //sets starting value of greens before fading
for(int x = 0; x <= 125 ; x++)
{
analogWrite(blueLED, blueValue--); //dims out blue to off
analogWrite(redLED, 0); //sets value of red input to 0 or no red
analogWrite(greenLED, greenValue++); //fades green to full brightness
delay(10);
}
}
//state 3 - after third cup is hit
//color will fade into CYAN as the bar moves
if (state == 3)
{
blueValue = 0; //sets starting value of blues before fading
greenValue = 255; //sets starting value of greens before fading
for(int x = 0; x <= 255 ; x++)
{
analogWrite(blueLED, blueValue++); //fades in blue so color turns cyan
analogWrite(redLED, 0); //sets value of red input to 0 or no red
analogWrite(greenLED, greenValue); //stays green throughout movement
delay(5); //only 5 delay because of longer loop
}
}
//state 4 - after fourth cup is hit
//color will fade into PINK as the bar moves.
if (state == 4)
{
blueValue = 250; //sets starting value of blues before fading
greenValue = 250; //sets starting value of greens before fading
redValue = 0; //sets starting value of reds before fading
for(int x = 0; x <= 125 ; x++)
{
analogWrite(blueLED, blueValue--); //fades in blue so color turns cyan
analogWrite(redLED, redValue++); //sets value of red input to 0 or no red
analogWrite(greenLED, greenValue-2); //stays green throughout movement
delay(10);
}
}
//state 5 - after fifth cup is hit
//color will fade to red and start pulsing
if (state == 5)
{
for(int x = 0; x <= 125 ; x++) //loop to fade to red
{
analogWrite(blueLED, blueValue--); //fades in blue so color turns cyan
analogWrite(redLED, redValue++); //sets value of red input to 0 or no red
delay(10);
}
do{ //pulsing loop
for (int intensity = 255; intensity >=0; intensity++)
{
analogWrite(redLED, intensity);
delay(2);
}
for(int intensity=0;intensity<=255;intensity++)
{ analogWrite(redLED,intensity);
delay(2);
}
}while(state!=6); //break once state 6 is reached
}
//state 6 - after final cup has been removed
//colors will quickly start flashing and then reset after 2 seconds of being off
if (state == 6)
{
for(int flashing = 0; flashing<=10;flashing++)
{
//pulse red fast
for(int intensity=0;intensity<=255;intensity++)
{ analogWrite(redLED,intensity);
delay(1);
}
for (int intensity = 255; intensity >=0; intensity++)
{
analogWrite(redLED, intensity);
delay(1);
}
//pulse green fast
for(int intensity=0;intensity<=255;intensity++)
{ analogWrite(greenLED,intensity);
delay(1);
}
for (int intensity = 255; intensity >=0; intensity++)
{
analogWrite(greenLED, intensity);
delay(1);
}
//pulse blue fast
for(int intensity=0;intensity<=255;intensity++)
{ analogWrite(greenLED,intensity);
delay(1);
}
for (int intensity = 255; intensity >=0; intensity++)
{
analogWrite(greenLED, intensity);
delay(1);
}
}
analogWrite(blueLED, 0); //shuts off blue LED for 2 seconds
analogWrite(redLED, 0); //shuts off red LED for 2 seconds
analogWrite(greenLED, 0); //shuts off green LED for 2 seconds
delay(2000); //wait 2 seconds
reset(); //run the reset program
}
}
//reset program sets variables back to default state and puts LED's back to blue
void reset()
{
for(int z = 0; z<6 ; z++)
{
isCupHit[z] = false; //refills the array with false's, telling the program that no cups have been hit.
}
numberOfCupsHit = 0; //no cups of have been hit
analogWrite(redLED, 0); //red leds are off
analogWrite(greenLED, 0); //green leds are off
analogWrite(blueLED, 255); //blue leds on high
redValue = 0; //store red led value as off or 0
blueValue = 255; //store blue led value as high
greenValue = 0; //store green led value as 0
}
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