PN532.h

00001 #ifndef __PN532_H__
00002 #define __PN532_H__
00003 
00004 #define PN532_PREAMBLE 0x00
00005 #define PN532_STARTCODE1 0x00
00006 #define PN532_STARTCODE2 0xFF
00007 #define PN532_POSTAMBLE 0x00
00008 
00009 #define PN532_HOSTTOPN532 0xD4
00010 
00011 #define PN532_FIRMWAREVERSION 0x02
00012 #define PN532_GETGENERALSTATUS 0x04
00013 #define PN532_SAMCONFIGURATION  0x14
00014 #define PN532_INLISTPASSIVETARGET 0x4A
00015 #define PN532_INDATAEXCHANGE 0x40
00016 #define PN532_INJUMPFORDEP 0x56
00017 #define PN532_TGINITASTARGET 0x8C
00018 #define PN532_TGGETDATA 0x86
00019 #define PN532_TGSETDATA 0x8E
00020 
00021 
00022 
00023 #define PN532_WAKEUP 0x55
00024 #define  PN532_SPI_STATREAD  0x02
00025 #define  PN532_SPI_DATAWRITE 0x01
00026 #define  PN532_SPI_DATAREAD  0x03
00027 #define  PN532_SPI_READY  0x01
00028 
00029 #define PN532_MIFARE_ISO14443A 0x0
00030 
00031 #define KEY_A   1
00032 #define KEY_B   2
00033 
00034 #define mosi1 p5
00035 #define miso1 p6
00036 #define sclk1 p7
00037 #define ss1 p8
00038 
00039 #define REVERSE_BITS_ORDER(b)         b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; \
00040     b = (b & 0xCC) >> 2 | (b & 0x33) << 2; \
00041     b = (b & 0xAA) >> 1 | (b & 0x55) << 1
00042 
00043 class PN532
00044 {
00045 public:
00046   
00047   PN532(PinName mosi, PinName miso, PinName sclk, PinName ss);
00048   void begin(void);         
00049   bool SAMConfig(void);
00050   uint32_t getFirmwareVersion(void);
00051   uint32_t configurePeerAsInitiator(void);
00052   uint32_t configurePeerAsTarget(void);
00053   bool initiatorTxRx(char* dataOut, char* dataIn); 
00054   uint32_t targetTxRx(char* dataOut, char* dataIn);
00055   bool sendCommandCheckAck(uint8_t *cmd, uint8_t cmdlen, uint16_t timeout = 1000);
00056   
00057 private:
00058   DigitalOut *_ss;   
00059   SPI *_spi;
00060   
00061   uint8_t read(uint8_t buff[], uint8_t n);
00062   uint8_t readSpiStatus(void);
00063   bool checkSpiAck(void);
00064   void writeCommand(uint8_t buf[], uint8_t len);
00065   void wakeup (void);
00066     inline void write(uint8_t data) {
00067         REVERSE_BITS_ORDER(data);
00068         _spi->write(data);
00069     }
00070   inline uint8_t read() {
00071         uint8_t data =  _spi->write(0);
00072         REVERSE_BITS_ORDER(data);
00073         return data;
00074     }
00075   
00076   
00077 };
00078 
00079 #endif