added arduino nfcReader files (#42)

Arduino/nfcReader/NDEF/NfcAdapter.h

@@ -0,0 +1,45 @@
+#ifndef NfcAdapter_h
+#define NfcAdapter_h
+
+#include <PN532Interface.h>
+#include <PN532.h>
+#include <NfcTag.h>
+#include <Ndef.h>
+
+// Drivers
+#include <MifareClassic.h>
+#include <MifareUltralight.h>
+
+#define TAG_TYPE_MIFARE_CLASSIC (0)
+#define TAG_TYPE_1 (1)
+#define TAG_TYPE_2 (2)
+#define TAG_TYPE_3 (3)
+#define TAG_TYPE_4 (4)
+#define TAG_TYPE_UNKNOWN (99)
+
+#define IRQ   (2)
+#define RESET (3)  // Not connected by default on the NFC Shield
+
+class NfcAdapter {
+    public:
+        NfcAdapter(PN532Interface &interface);
+
+        ~NfcAdapter(void);
+        void begin(boolean verbose=true);
+        boolean tagPresent(unsigned long timeout=0); // tagAvailable
+        NfcTag read();
+        boolean write(NdefMessage& ndefMessage);
+        // erase tag by writing an empty NDEF record
+        boolean erase();
+        // format a tag as NDEF
+        boolean format();
+        // reset tag back to factory state
+        boolean clean();
+    private:
+        PN532* shield;
+        byte uid[7];  // Buffer to store the returned UID
+        unsigned int uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
+        unsigned int guessTagType();
+};
+
+#endif