Bare Conductive LED controller

Touch_LEDs.ino

/*******************************************************************************

 Bare Conductive LED controller
 ------------------------------
 
 Touch_LEDs.ino - touch triggered LED control - maps each electrode to a digital
 output and toggles it on and off.
 
 Based on code by Jim Lindblom and plenty of inspiration from the Freescale 
 Semiconductor datasheets and application notes.
 
 Bare Conductive code written by Stefan Dzisiewski-Smith and Peter Krige.
 
 This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 
 Unported License (CC BY-SA 3.0) http://creativecommons.org/licenses/by-sa/3.0/
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.

*******************************************************************************/

// compiler error handling
//#include "Compiler_Errors.h"

// touch includes
#include <MPR121.h>
#include <Wire.h>
#define MPR121_ADDR 0x5C
#define MPR121_INT 4

// touch behaviour definitions
#define firstPin 0
#define lastPin 11

// maps electrode 0 to digital 0, electrode 2 to digital 1, electrode 3 to digital 10 and so on...
// A0..A5 are the analogue input pins, used as digital outputs in this example
const int pinMap[12] = {0, 1, 10, 11, 12, 13, A0, A1, A2, A3, A4, A5};

void setup(){  
  Serial.begin(57600);
  
  if(!MPR121.begin(MPR121_ADDR)) Serial.println("error setting up MPR121");
  MPR121.setInterruptPin(MPR121_INT);
   
   for(int i=firstPin; i<=lastPin; i++){
     pinMode(pinMap[i], OUTPUT); 
     digitalWrite(pinMap[i], LOW);
   }   
}

void loop(){
  readTouchInputs();
}


void readTouchInputs(){
  if(MPR121.touchStatusChanged()){
    
    MPR121.updateTouchData();

    // only make an action if we have one or fewer pins touched
    // ignore multiple touches
    
    if(MPR121.getNumTouches()<=1){
      for (int i=0; i < 12; i++){  // Check which electrodes were pressed
        if(MPR121.isNewTouch(i)){
          digitalWrite(pinMap[i], !digitalRead(pinMap[i]));  
          Serial.print("Toggling pin ");
          Serial.println(pinMap[i]);  
        }
      }
    }
  }
}