PN532_SPI.h

00001 
00002 #ifndef __PN532_SPI_H__
00003 #define __PN532_SPI_H__
00004 
00005 #include "mbed.h"
00006 #include "PN532Interface.h"
00007 
00008 class PN532_SPI : public PN532Interface
00009 {
00010 public:
00011     PN532_SPI(SPI &spi, PinName ss);
00012     PN532_SPI(SPI *spi, PinName ss);
00013 
00014     virtual void begin();
00015     virtual void wakeup();
00016     virtual int8_t writeCommand(const uint8_t *header, uint8_t hlen, const uint8_t *body, uint8_t blen);
00017     virtual int16_t readResponse(uint8_t buf[], uint8_t len, uint16_t timeout);
00018 
00019 private:
00020     SPI        *_spi;
00021     DigitalOut  _ss;
00022     uint8_t     command;
00023 
00024     bool isReady();
00025     void writeFrame(const uint8_t *header, uint8_t hlen, const uint8_t *body, uint8_t blen);
00026     int8_t readAckFrame();
00027 
00028     inline void write(uint8_t data) {
00029         REVERSE_BITS_ORDER(data);
00030         _spi->write(data);
00031     }
00032     inline uint8_t read() {
00033         uint8_t data =  _spi->write(0);
00034         REVERSE_BITS_ORDER(data);
00035         return data;
00036     }
00037 };
00038 
00039 #endif