mfrc500.h

该程序是将读到的IC卡卡号转换成韦根26代码进行输出。读卡芯片采用的是飞利浦公司的Mf500,单片机采用的是atmel公司的atmeg8

#define ResetInfo(info)    \
            info.cmd            = 0; \
            info.status         = MI_OK;\
			info.nBytesSent     = 0; \
            info.nBytesToSend   = 0; \
            info.nBytesReceived = 0; \
            info.nBitsReceived  = 0; \
			info.irqSource      = 0; \
			info.collPos        = 0; 
typedef struct 
   			{
            unsigned char  cmd;           //!< command code 
            int            status;        //!< communication status
            unsigned char  nBytesSent;    //!< how many bytes already sent
            unsigned char  nBytesToSend;  //!< how many bytes to send
            unsigned char  nBytesReceived;//!< how many bytes received
            unsigned short nBitsReceived; //!< how many bits received
            unsigned char  irqSource;     //!< which interrupts have occured
            unsigned char  collPos;       /*!< at which position occured a
                                          collision*/
         } MfCmdInfo;
 
#define GetRegPage(addr) (0x80 | (addr>>3))
#define PICC_REQIDL        0x26         //!< request idle
#define PICC_REQALL        0x52         //!< request all
#define PICC_ANTICOLL1     0x93         //!< anticollision level 1 106 kBaud
#define PICC_ANTICOLL2     0x95         //!< anticollision level 2
#define PICC_ANTICOLL3     0x97         //!< anticollision level 3

#define MI_OK                           0
#define MI_NOTAGERR                     (-1)
#define MI_CRCERR                       (-2)
#define MI_PARITYERR                    (-5)
#define MI_SERNRERR                     (-8)
#define MI_BITCOUNTERR                  (-11)
#define MI_OVFLERR                      (-19)
#define MI_FRAMINGERR                   (-21)
#define MI_UNKNOWN_COMMAND              (-23)
#define MI_COLLERR                      (-24)
#define MI_RESETERR                     (-25)
#define MI_INTERFACEERR                 (-26)
#define MI_ACCESSTIMEOUT                (-27)
#define MI_NY_IMPLEMENTED               (-100)
 
#define     RegPage               0x00   //!< Page Select Register
#define     RegCommand            0x01   //!< Command Register
#define     RegFIFOData           0x02   //!< FiFo Register
#define     RegPrimaryStatus      0x03   //!< Modem State/IRQ/ERR/LoHiAlert Reg
#define     RegFIFOLength         0x04   //!< Buffer length Register
#define     RegSecondaryStatus    0x05   //!< diverse status flags
#define     RegInterruptEn        0x06   //!< IRQ enable Register
#define     RegInterruptRq        0x07   //!< IRQ bits Register
// PAGE 1      Control and Status
#define     RegControl            0x09   //!< processor control
#define     RegErrorFlag          0x0A   /*!< error flags showing the error 
                                         status of the last command executed */
#define     RegCollPos            0x0B   /*!< bit position of the first bit 
                                         collision detected on the 
                                         RF-interface */
#define     RegBitFraming         0x0F   //!< Adjustments for bit oriented frames
#define     RegTxControl          0x11   //!< controls the logical behaviour of 
                                         //!< the antenna driver pins TX1 and TX2
#define     RegDecoderControl     0x1A   //!< controls decoder behaviour
#define     RegBitPhase           0x1B   /*!< selets the bit phase between 
                                         transmitter and receiver clock */
#define     RegRxThreshold        0x1C   /*!< selects thresholds for the bit 
                                         decoder */
#define     RegRxControl2         0x1E   /*!< controls decoder behaviour and 
                                         defines the input source for the 
                                         receiver */
#define     RegClockQControl      0x1F   /*!< controls clock generation for the 
                                         90