Marius 90 / Mbed 2 deprecated pn532-SPI-p2p

nxp pn532 NFC SPI initiator code, with all functions minimized and made as fast as possible (code for target is also there, you just need to change the functions in the main). Code advises are welcome, i am an electronist not a programmer

Dependencies:   mbed

lib/PN532.h

Committer:
marius90
Date:
2013-11-15
Revision:
0:f07ca719c12e

File content as of revision 0:f07ca719c12e:

#ifndef __PN532_H__
#define __PN532_H__

#define PN532_PREAMBLE 0x00
#define PN532_STARTCODE1 0x00
#define PN532_STARTCODE2 0xFF
#define PN532_POSTAMBLE 0x00

#define PN532_HOSTTOPN532 0xD4

#define PN532_FIRMWAREVERSION 0x02
#define PN532_GETGENERALSTATUS 0x04
#define PN532_SAMCONFIGURATION  0x14
#define PN532_INLISTPASSIVETARGET 0x4A
#define PN532_INDATAEXCHANGE 0x40
#define PN532_INJUMPFORDEP 0x56
#define PN532_TGINITASTARGET 0x8C
#define PN532_TGGETDATA 0x86
#define PN532_TGSETDATA 0x8E



#define PN532_WAKEUP 0x55
#define  PN532_SPI_STATREAD  0x02
#define  PN532_SPI_DATAWRITE 0x01
#define  PN532_SPI_DATAREAD  0x03
#define  PN532_SPI_READY  0x01

#define PN532_MIFARE_ISO14443A 0x0

#define KEY_A   1
#define KEY_B   2

#define mosi1 p5
#define miso1 p6
#define sclk1 p7
#define ss1 p8

#define REVERSE_BITS_ORDER(b)         b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; \
    b = (b & 0xCC) >> 2 | (b & 0x33) << 2; \
    b = (b & 0xAA) >> 1 | (b & 0x55) << 1

class PN532
{
public:
  
  PN532(PinName mosi, PinName miso, PinName sclk, PinName ss);
  void begin(void);         
  bool SAMConfig(void);
  uint32_t getFirmwareVersion(void);
  uint32_t configurePeerAsInitiator(void);
  uint32_t configurePeerAsTarget(void);
  bool initiatorTxRx(char* dataOut, char* dataIn); 
  uint32_t targetTxRx(char* dataOut, char* dataIn);
  bool sendCommandCheckAck(uint8_t *cmd, uint8_t cmdlen, uint16_t timeout = 1000);
  
private:
  DigitalOut *_ss;   
  SPI *_spi;
  
  uint8_t read(uint8_t buff[], uint8_t n);
  uint8_t readSpiStatus(void);
  bool checkSpiAck(void);
  void writeCommand(uint8_t buf[], uint8_t len);
  void wakeup (void);
    inline void write(uint8_t data) {
        REVERSE_BITS_ORDER(data);
        _spi->write(data);
    }
  inline uint8_t read() {
        uint8_t data =  _spi->write(0);
        REVERSE_BITS_ORDER(data);
        return data;
    }
  
  
};

#endif