added arduino nfcReader files (#42)

Arduino/nfcReader/PN532_I2C/PN532_I2C.h

@@ -0,0 +1,44 @@
+/**
+ * @modified picospuch
+ */
+
+#ifndef __PN532_I2C_H__
+#define __PN532_I2C_H__
+
+#include <Wire.h>
+#include "PN532Interface.h"
+
+class PN532_I2C : public PN532Interface {
+public:
+    PN532_I2C(TwoWire &wire);
+    
+    void begin();
+    void wakeup();
+    virtual int8_t writeCommand(const uint8_t *header, uint8_t hlen, const uint8_t *body = 0, uint8_t blen = 0);
+    int16_t readResponse(uint8_t buf[], uint8_t len, uint16_t timeout);
+    
+private:
+    TwoWire* _wire;
+    uint8_t command;
+    
+    int8_t readAckFrame();
+    int16_t getResponseLength(uint8_t buf[], uint8_t len, uint16_t timeout);
+    
+    inline uint8_t write(uint8_t data) {
+        #if ARDUINO >= 100
+            return _wire->write(data);
+        #else
+            return _wire->send(data);
+        #endif
+    }
+    
+    inline uint8_t read() {
+        #if ARDUINO >= 100
+            return _wire->read();
+        #else
+            return _wire->receive();
+        #endif
+    }
+};
+
+#endif