Initial implementation of iAcceleration

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/lsm303d/lsm303d.cxx

@@ -109,6 +109,15 @@ std::vector<float> LSM303D::getAccelerometer()
     return std::vector<float>(v, v+3);
 }
 
+std::vector<float> LSM303D::getAcceleration()
+{
+    std::vector<float> v(3);
+
+    lsm303d_get_accelerometer(m_lsm303d, &v[0], &v[1], &v[2]);
+    
+    return v;
+}
+
 float LSM303D::getTemperature()
 {
     return lsm303d_get_temperature(m_lsm303d);

src/lsm303d/lsm303d.hpp

@@ -31,6 +31,8 @@
 #include <mraa/gpio.hpp>
 #include "lsm303d.h"
 
+#include <interfaces/iAcceleration.hpp>
+
 namespace upm {
 
     /**
@@ -65,7 +67,7 @@ namespace upm {
      * @snippet lsm303d.cxx Interesting
      */
 
-    class LSM303D {
+    class LSM303D: virtual public iAcceleration {
     public:
         /**
          * LSM303D constructor
@@ -142,6 +144,13 @@ namespace upm {
          * that order
          */
         std::vector<float> getAccelerometer();
+        
+        /**
+         * get acceleration values
+         * 
+         * @return stl vector of size 3 representing the 3 axis
+         */
+        virtual std::vector<float> getAcceleration();
 
         /**
          * Return temperature data in degrees Celsius.  NOTE: This is