Initial implementation of iAcceleration

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>

src/bmi160/bmi160.cxx

@@ -84,6 +84,14 @@ float *BMI160::getAccelerometer()
   return values;
 }
 
+std::vector<float> BMI160::getAcceleration()
+{
+    std::vector<float> v(3);
+
+    bmi160_get_accelerometer(m_bmi160, &v[0], &v[1], &v[2]);
+    return v;
+}
+
 float *BMI160::getGyroscope()
 {
   static float values[3]; // x, y, and then z

src/bmi160/bmi160.hpp

@@ -25,6 +25,8 @@
 #include <string>
 #include "bmi160.h"
 
+#include <interfaces/iAcceleration.hpp>
+
 #define BMI160_I2C_BUS 0
 #define BMI160_DEFAULT_I2C_ADDR 0x69
 
@@ -72,7 +74,7 @@ namespace upm {
      *
      * @snippet bmi160.cxx Interesting
      */
-    class BMI160 {
+    class BMI160: virtual public iAcceleration {
     public:
 
         /**
@@ -142,6 +144,13 @@ namespace upm {
          */
         void getAccelerometer(float *x, float *y, float *z);
 
+        /**
+         * get acceleration values
+         * 
+         * @return stl vector of size 3 representing the 3 axis
+         */
+        virtual std::vector<float> getAcceleration();
+
         /**
          * Get the Gyroscope values.  This function returns a pointer to 3
          * floating point values: X, Y, and Z, in that order.  The values