Added iProximity interface

Signed-off-by: Stefan Andritoiu <stefan.andritoiu@gmail.com>

include/interfaces/iProximity.hpp

@@ -0,0 +1,39 @@
+/*
+ * Author: Mihai Stefanescu <mihai.stefanescu@rinftech.com>
+ * Copyright (c) 2018 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * 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.
+ */
+
+#pragma once
+
+namespace upm
+{
+/**
+ * @brief Interface for Proximity sensors
+*/
+  class iProximity
+  {
+  public:
+    virtual ~iProximity() {}
+
+    virtual float getValue() = 0;
+  };
+}

src/gp2y0a/gp2y0a.cxx

@@ -67,3 +67,8 @@ float GP2Y0A::value(float aref, uint8_t samples)
 
   return volts;
 }
+
+float GP2Y0A::getValue()
+{
+    return GP2Y0A::value(5.0, (uint8_t) 1);
+}

src/gp2y0a/gp2y0a.hpp

@@ -26,6 +26,7 @@
 #include <iostream>
 #include <string>
 #include <mraa/aio.h>
+#include <interfaces/iProximity.hpp>
 
 namespace upm {
   /**
@@ -46,15 +47,15 @@ namespace upm {
    *
    * @brief API for the GP2Y0A family of IR Proximity Sensors
    *
-   * Sensors of this family return an analog voltage corresponding to the distance 
+   * Sensors of this family return an analog voltage corresponding to the distance
    * of an object from the sensor. The voltage is lower when objects
    * are far away; the voltage increases as objects get closer
-   * to the sensor.  
+   * to the sensor.
    *
    * @image html gp2y0a.jpg
    * @snippet gp2y0a.cxx Interesting
    */
-  class GP2Y0A {
+  class GP2Y0A : virtual public iProximity {
   public:
 
     /**
@@ -78,11 +79,19 @@ namespace upm {
      */
     float value(float aref, uint8_t samples);
 
+    /**
+     * Gets the voltage value from the sensor from a single sample
+     * A refernce voltage of 5.0V is used for the reading.
+     *
+     * @return Voltage reading from a single sample
+     */
+    virtual float getValue();
+
+
+
   private:
     mraa_aio_context m_aio;
     // ADC resolution
     int m_aRes;
   };
 }
-
-

src/max44000/max44000.cxx

@@ -58,6 +58,11 @@ MAX44000::getProximity () {
     return data;
 }
 
+float
+MAX44000::getValue() {
+    return (float) MAX44000::getProximity();
+}
+
 uint16_t
 MAX44000::getAmbient () {
     uint16_t data = 0;

src/max44000/max44000.hpp

@@ -25,6 +25,7 @@
 
 #include <string>
 #include <mraa/i2c.hpp>
+#include <interfaces/iProximity.hpp>
 
 #define ADDR               0x4A // device address
 
@@ -71,14 +72,14 @@ namespace upm {
  * Maxim Integrated*
  * [MAX44000](http://datasheets.maximintegrated.com/en/ds/MAX44000.pdf)
  * is an ambient and infrared proximity sensor. This module was tested on the
- * Maxim Integrated 
+ * Maxim Integrated
  * [MAX44000PMB1 PMOD module]
  * (http://datasheets.maximintegrated.com/en/ds/MAX44000PMB1.pdf) from the
  * analog PMOD kit.
  *
  * @snippet max44000.cxx Interesting
  */
-class MAX44000 {
+class MAX44000 : virtual public iProximity {
     public:
         /**
          * Instantiates an MAX44000 object
@@ -99,6 +100,12 @@ class MAX44000 {
          * Reads the proximity value from the sensor (based on ambient data).
          */
         uint16_t getProximity ();
+
+        /**
+         * Reads the proximity value from the sensor.
+         */
+        virtual float getValue ();
+
         /**
          * Reads the ambient value from the sensor (based on ambient data).
          */