Added HardwareI2C

Author: cmaglie

api/ArduinoAPI.h

@@ -27,6 +27,7 @@
 
 #ifdef __cplusplus
 #include "Client.h"
+#include "HardwareI2C.h"
 #include "HardwareSerial.h"
 #include "IPAddress.h"
 #include "Print.h"

api/HardwareI2C.h

@@ -0,0 +1,43 @@
+/*
+  Copyright (c) 2016 Arduino LLC.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include <inttypes.h>
+#include "Stream.h"
+
+class HardwareI2C : public Stream
+{
+  public:
+    virtual void begin() = 0;
+    virtual void begin(uint8_t address) = 0;
+    virtual void end() = 0;
+
+    virtual void setClock(uint32_t freq) = 0;
+  
+    virtual void beginTransmission(uint8_t address) = 0;
+    virtual uint8_t endTransmission(bool stopBit) = 0;
+    virtual uint8_t endTransmission(void) = 0;
+
+    virtual uint8_t requestFrom(uint8_t address, size_t len, bool stopBit) = 0;
+    virtual uint8_t requestFrom(uint8_t address, size_t len) = 0;
+
+    virtual void onReceive(void(*)(int)) = 0;
+    virtual void onRequest(void(*)(void)) = 0;
+};
+