RPi: Add support for I2C

Add MyHw file for RaspberryPi.

Fix compilation warnings in x86.

Fix some error messages.

drivers/Linux/SoftEeprom.h

@@ -0,0 +1,81 @@
+/**
+ * The MySensors Arduino library handles the wireless radio link and protocol
+ * between your home built sensors/actuators and HA controller of choice.
+ * The sensors forms a self healing radio network with optional repeaters. Each
+ * repeater and gateway builds a routing tables in EEPROM which keeps track of the
+ * network topology allowing messages to be routed to nodes.
+ *
+ * Created by Marcelo Aquino <marceloaqno@gmail.org>
+ * Copyright (C) 2016 Marcelo Aquino
+ * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
+ *
+ * Documentation: http://www.mysensors.org
+ * Support Forum: http://forum.mysensors.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+/**
+* This a software emulation of EEPROM that uses a file for data storage.
+* A copy of the eeprom values are also held in memory for faster reading.
+*/
+
+#ifndef SoftEeprom_h
+#define SoftEeprom_h
+
+#include <stdint.h>
+
+/**
+ * SoftEeprom class
+ */
+class SoftEeprom {
+
+private:
+	size_t _length; //!< @brief Eeprom max size.
+	char *_fileName; //!< @brief file where the eeprom values are stored.
+	uint8_t *_values; //!< @brief copy of the eeprom values held in memory for a faster reading.
+
+public:
+	/**
+	 * @brief SoftEeprom constructor.
+	 */
+	SoftEeprom(const char *fileName, size_t length);
+	/**
+	 * @brief SoftEeprom destructor.
+	 */
+	~SoftEeprom();
+	/**
+	 * @brief Read a block of bytes from eeprom.
+	 *
+	 * @param buf buffer to copy to.
+	 * @param addr eeprom address to read from.
+	 * @param length number of bytes to read.
+	 */
+	void readBlock(void* buf, void* addr, size_t length);
+	/**
+	 * @brief Write a block of bytes to eeprom.
+	 *
+	 * @param buf buffer to read from.
+	 * @param addr eeprom address to write to.
+	 * @param length number of bytes to write.
+	 */
+	void writeBlock(void* buf, void* addr, size_t length);
+	/**
+	 * @brief Read a byte from eeprom.
+	 *
+	 * @param addr eeprom address to read from.
+	 * @return the read byte.
+	 */
+	uint8_t readByte(int addr);
+	/**
+	 * @brief Write a byte to eeprom.
+	 *
+	 * @param addr eeprom address to write to.
+	 * @param value to write.
+	 */
+	void writeByte(int addr, uint8_t value);
+};
+
+#endif