Instagram Multi button (Arduino)

gistfile1.ino

//P-comp midterm
//Instagram grid-button prototype
//5 October 2014
//Craig Pickard and Minju Viviana Kim

boolean checkButtons = false;
//assign variables for each grid tile
const int button1 = 2;
const int button2 = 3;
const int button3 = 4;
const int button4 = 5;
const int button5 = 6;
const int button6 = 7;
const int button7 = 8;

int leftProx = 135;
int rightProx = 150;

int buttonValue = 0;

int inByte;


//set button states for each tile to false
int previousButtonState1 = LOW;
int previousButtonState2 = LOW;
int previousButtonState3 = LOW;
int previousButtonState4 = LOW;
int previousButtonState5 = LOW;
int previousButtonState6 = LOW;
int previousButtonState7 = LOW;
int previousButtonState8 = LOW;
int previousButtonState9 = LOW;

void setup(){
  //declare all tiles as digital inputs
  pinMode(button1,INPUT);
  pinMode(button2,INPUT);
  pinMode(button3,INPUT);
  pinMode(button4,INPUT);
  pinMode(button5,INPUT);
  pinMode(button6,INPUT);
  pinMode(button7,INPUT);
  Serial.begin(9600);

  establishContact(); //establish contact with Processing
}

void loop(){

  if (Serial.available() > 0) { //When processing responds after initial contact
    //data is sent serially to arduino, which causes
    //the conditional statement to evaluate to true
    
    inByte = Serial.read();

    //read the button state of each tile
    int buttonState1 = digitalRead(button1);
    int buttonState2 = digitalRead(button2);
    int buttonState3 = digitalRead(button3);
    int buttonState4 = digitalRead(button4);
    int buttonState5 = digitalRead(button5);
    int buttonState6 = digitalRead(button6);
    int buttonState7 = digitalRead(button7);
    int buttonState8 = 0; //phantom button
    int buttonState9 = 0; //phantom button

    //check if current button states are different to previous states

    //if (buttonState1 == LOW && buttonState2 == LOW && buttonState3 == LOW && buttonState4 == LOW && buttonState5 == LOW && buttonState6 == LOW && buttonState7 == LOW && buttonState8 == LOW && buttonState9 == LOW){
    //Serial.print("0");
    //Serial.print(",");

    if (buttonState1 != previousButtonState1){
      if(buttonState1 == HIGH){
        buttonValue = 1;
      }
    }
    if (buttonState2 != previousButtonState2){
      if(buttonState2 == HIGH){
        buttonValue = 2;
      }
    }
    if (buttonState3 != previousButtonState3){
      if(buttonState3 == HIGH){
        buttonValue = 3;
      }
    }
    if (buttonState4 != previousButtonState4){
      if(buttonState4 == HIGH){
        buttonValue = 4;
      }
    }
    if (buttonState5 != previousButtonState5){
      if(buttonState5 == HIGH){
        buttonValue = 5;
      }
    }
    if (buttonState6 != previousButtonState6){
      if(buttonState6 == HIGH){
        buttonValue = 6;
      }
    }
    if (buttonState7 != previousButtonState7){
      if(buttonState7 == HIGH){
        buttonValue = 7;
      }
    }
    if (buttonState8 != previousButtonState8){
      if(buttonState8 == HIGH){
        buttonValue = 8;
      }
    }
    if (buttonState9 != previousButtonState9){
      if(buttonState9 == HIGH){
        buttonValue = 9;
      } 
    }

    Serial.print(buttonValue);
    Serial.print(",");
    Serial.print(leftProx);
    Serial.print(",");
    Serial.println(rightProx);


    //send data to Processing as string of values

    previousButtonState1 = buttonState1;
    previousButtonState2 = buttonState2;
    previousButtonState3 = buttonState3;
    previousButtonState4 = buttonState4;
    previousButtonState5 = buttonState5;
    previousButtonState6 = buttonState6;
    previousButtonState7 = buttonState7;
    previousButtonState8 = buttonState8;
    previousButtonState9 = buttonState9;

//delay(10);
  }


}


//create a method that causes Processing to request new data only when
//it is ready to receive it.
void establishContact(){
  while(Serial.available() <= 0){
    Serial.println("begin"); //send message to begin communication
    delay(300);
  }
}