emulatetag.h

00001 /**************************************************************************/
00002 /*!
00003     @file     emulatetag.h
00004     @author   Armin Wieser
00005     @license  BSD
00006 
00007     Implemented using NFC forum documents & library of libnfc
00008 */
00009 /**************************************************************************/
00010 
00011 
00012 #ifndef __EMULATETAG_H__
00013 #define __EMULATETAG_H__
00014 
00015 #include "PN532.h "
00016 
00017 #define NDEF_MAX_LENGTH 128  // altough ndef can handle up to 0xfffe in size, arduino cannot.
00018 typedef enum {COMMAND_COMPLETE, TAG_NOT_FOUND, FUNCTION_NOT_SUPPORTED, MEMORY_FAILURE, END_OF_FILE_BEFORE_REACHED_LE_BYTES} responseCommand;
00019 
00020 class EmulateTag{
00021 
00022 public:
00023 EmulateTag(PN532Interface &interface) : pn532(interface), uidPtr(0), tagWrittenByInitiator(false) { }
00024   
00025   bool init();
00026 
00027   bool emulate(const uint16_t tgInitAsTargetTimeout = 0);
00028 
00029   /*
00030    * @param uid pointer to byte array of length 3 (uid is 4 bytes - first byte is fixed) or zero for uid 
00031    */
00032   void setUid(uint8_t* uid = 0);
00033 
00034   void setNdefFile(const uint8_t* ndef, const int16_t ndefLength);
00035 
00036   void getContent(uint8_t** buf, uint16_t* length){
00037     *buf = ndef_file + 2; // first 2 bytes = length
00038     *length = (ndef_file[1] << 8) + ndef_file[0];
00039   }
00040 
00041   bool writeOccured(){
00042     return tagWrittenByInitiator;
00043   }
00044 
00045 private:
00046   PN532 pn532;
00047   uint8_t ndef_file[NDEF_MAX_LENGTH];
00048   uint8_t* uidPtr;
00049   void setResponse(responseCommand cmd, uint8_t* buf, uint8_t* sendlen, uint8_t sendlenOffset =0);
00050   bool tagWrittenByInitiator;
00051 };
00052 
00053 #endif