Add I2C support

Author: pennam

PortentaBreakoutCarrier.h

@@ -29,6 +29,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 #include "Arduino.h"
 #include "pins_arduino.h"
 #include "mbed.h"
+#include "Wire.h"
 
 #define LAST_ARDUINO_PIN_NUMBER LEDB + 1
 typedef enum {
@@ -188,6 +189,14 @@ class BreakoutCarrierClass {
         }
         return -1;
     }
+    MbedI2C I2C_0;
+    MbedI2C I2C_1;
+    MbedI2C I2C_2;
+    BreakoutCarrierClass() : I2C_0(PH_8,PH_7),
+                             I2C_1(PB_7,PB_6),
+                             I2C_2(PH_12,PH_11)
+    {
+    }
 };
 
 BreakoutCarrierClass Breakout;