BMG160: Add string based cons for 3-axis Gyroscope

Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/bmg160/bmg160.hpp

@@ -29,6 +29,7 @@
 #include <vector>
 
 #include <mraa/gpio.hpp>
+#include <mraa/initio.hpp>
 #include "bmg160.h"
 
 #include <interfaces/iGyroscope.hpp>
@@ -94,6 +95,13 @@ namespace upm {
         BMG160(int bus=BMG160_DEFAULT_I2C_BUS, int addr=BMG160_DEFAULT_ADDR,
                int cs=-1);
 
+        /**
+         * Instantiates BMG160 3-axis Gyroscope based on a given string.
+         *
+         * @param initStr string containing specific information for BMG160 initialization.
+         */
+        BMG160(std::string initStr);
+
         /**
          * BMG160 Destructor.
          */
@@ -472,6 +480,7 @@ namespace upm {
 
     protected:
         bmg160_context m_bmg160;
+        mraa::MraaIo mraaIo;
 
     private:
         /* Disable implicit copy and assignment operators */