//****************************
//  Created by:
//  Larsha Johnson
//  2/29/16
// HCSR04 Header file
//****************************  
/*  This library controls the HCSR-04 Proximity Sensor for use with an Arduino. 
  The sensor outputs the distance of an object in cm. 
  It also outputs is the object is near, far or holding position.
  
*/
//Define this file to allow use via Arduino 
#ifndef HCSR04_h
#define HCSR04_h

#undef int //Allows use of functions that return as integers

#include "Arduino.h" //Includes the Arduino library header 

//Assigns class
class HCSR04ProxSensor{
      public:              
             //Assigns constructor. Called when a new object is created
             HCSR04ProxSensor(int echoPin, int trigPin);       
             
             //Assigns public integers
             int distance;
             int prevDist;
             
             //Assigns public functions
             int readSensor();
             int getLastValue();
             void start();
//**************************************************************************
//Cannot accidently be changed             
      private:
              //Assigns private variables for use in HCSR04.cpp
              int _trigPin;
              int _echoPin;
              int _dist;
              int _prevDist;
};

#endif

//End