gamepad.cpp

/*
Code developed by Team 7, B.Tech 2011, DA-IICT, India
for making controller  for operating in arduino project on TicTacToe

Please feel free to download, use and share
Cheers !!
*/

int j = 1; // integer used in scanning the array designating column number
//2-dimensional array for asigning the buttons and there high and low values
// 1 = Left
// 2 = TOP
// 3 = RIGHT
// 4 = DOWN
// 5 = OK
// 6 = SWITCH MODE
int Button[6][3] = {{1, 805, 838}, // button 1
                     {2, 720, 750}, // button 2
                     {3, 560, 611}, // button 3
                     {4, 260, 300}, // button 4
                     {5, 150, 179}, // button 5
                     {6, 60, 90}}; // button 6
            
int analogpin = A0;// analog pin to read the buttons
int label = 0;  // for reporting the button label
int counter = 0; // how many times we have seen new value
long time = 0;  // the last time the output pin was sampled
int debounce_count = 100; // number of millis/samples to consider before declaring a debounced input
int current_state = 0;  // the debounced input value
int ButtonVal;

void setup()
{
  Serial.begin(9600); 

}

void loop()
{
   // If we have gone on to the next millisecond
  if (millis() != time)
  {
    // check analog pin for the button value and save it to ButtonVal
    ButtonVal = analogRead(analogpin);
    Serial.println(ButtonVal);
    if(ButtonVal == current_state && counter >0)
    { 
      counter--;
    }
    if(ButtonVal != current_state)
    {
      counter++;
    }
    // If ButtonVal has shown the same value for long enough let's switch it
    if (counter >= debounce_count)
    {
      counter = 0;
      current_state = ButtonVal;
      //Checks which button has been pressed
      if (ButtonVal > 0)
      {
        ButtonCheck();
      }
    }
    time = millis();
  }
}

void ButtonCheck()
{
  // loop for scanning the button array.
  for(int i = 0; i <= 6; i++)
  {
    // checks the ButtonVal against the high and low vales in the array
    if(ButtonVal >= Button[i][j] && ButtonVal <= Button[i][j+1])
    {
      // stores the button number to a variable
      label = Button[i][0];
      Action();      
    }
  }
}

void Action()
{
  if(label == 1)
  {
    Serial.println("LEFT");
  }
  if(label == 2)
  {
    Serial.println("TOP");
  }
  if(label == 3)
  { 
    Serial.println("Right");
  }
  if(label == 4)
  {
    Serial.println("DOWN");
  }
  if(label == 5)
  {
    Serial.println("OK");
  }
  if(label == 6)
  {
    Serial.println("MODE");
  }
  //Serial.println("Button =:");
  //Serial.println(label);
  //delay(200);
}