rfid -->MFRC-523 ID auslesen

/*

Selftest

The MFRC523 has the capability to perform a digital self-test. The self-test is started by

using the following procedure:

1. Perform a soft reset.

2. Clear the internal buffer by writing 25 bytes of 00h and implement the Config command.

3. Enable the self-test by writing 09h to the AutoTestReg register.

4. Write 00h to the FIFO buffer.

5. Start the self-test with the CalcCRC command.

6. The self-test is initiated.

7. When the self-test has completed, the FIFO buffer contains the following 64 bytes:

   FIFO buffer byte values for version B2h:

   0x00, 0xEB, 0x66, 0xBA, 0x57, 0xBF, 0x23, 0x95, 0xD0, 0xE3, 0x0D, 0x3D, 0x27, 0x89,

   0x5C, 0xDE, 0x9D, 0x3B, 0xA7, 0x00, 0x21, 0x5B, 0x89, 0x82, 0x51, 0x3A, 0xEB,

   0x02, 0x0C, 0xA5, 0x00, 0x49, 0x7C, 0x84, 0x4D, 0xB3, 0xCC, 0xD2, 0x1B, 0x81,

   0x5D, 0x48, 0x76, 0xD5, 0x71, 0x61, 0x21, 0xA9, 0x86, 0x96, 0x83, 0x38, 0xCF,

   0x9D, 0x5B, 0x6D, 0xDC, 0x15, 0xBA, 0x3E, 0x7D, 0x95, 0x3B, 0x2F

*/

SET_SFRPAGE (CONFIG_PAGE);

CS_RST_RFID = 1;

for(i=0; i<64; i++)

{

  buf[5+i] = 0x00;

}

SET_SFRPAGE (SPI0_PAGE);

SPICFG (0, 0);  // CLKPOL=0, CLKPHA=0        

// 1. Perform a soft reset

// -----------------------

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 0;

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x01<<1);  // write CommandReg register. 

while (!SPIF);  // wait until transmission complete

SPIF = 0;

SPI0DAT = 0x0F;  // SoftReset

while (!SPIF);  // wait until transmission complete

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

// 2. Clear the internal buffer by writing 25 bytes of 00h and implement the Config command

// ----------------------------------------------------------------------------------------

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x09<<1);  // write FIFODataReg register. 

while (!SPIF);  // wait until transmission complete

for(i=0; i<25; i++)

{

  SPIF = 0;

  SPI0DAT = 0x00;  // 00h

  while (!SPIF);  // wait until transmission complete

}

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x01<<1);  // write CommandReg register. 

while (!SPIF);  // wait until transmission complete

SPIF = 0;

SPI0DAT = 0x01;  // MEM command. Stores 25 bytes from FIFO buffer in the internal buffer.

while (!SPIF);  // wait until transmission complete

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

// 3. Enable the self-test by writing 09h to the AutoTestReg register

// ------------------------------------------------------------------

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x36<<1);  // write AutoTestReg register. 

while (!SPIF);  // wait until transmission complete

SPIF = 0;

SPI0DAT = 0x09;  // 

while (!SPIF);  // wait until transmission complete

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

// 4. Write 00h to the FIFO buffer

// -------------------------------

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x09<<1);  // write FIFODataReg register. 

while (!SPIF);  // wait until transmission complete

for(i=0; i<64; i++)

{

  SPIF = 0;

  SPI0DAT = 0x00;  // 00h

  while (!SPIF);  // wait until transmission complete

}

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

// 5. Start the self-test with the CalcCRC command

// -----------------------------------------------

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x01<<1);  // write CommandReg register.  

while (!SPIF);  // wait until transmission complete

SPIF = 0;

SPI0DAT = 0x03;  // CalcCRC command, activates the CRC coprocessor or performs a self-test

while (!SPIF);  // wait until transmission complete

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;

// 6. The self-test is initiated.

for(w_i=0;w_i<60000;w_i++);

// 7. When the self-test has completed, the FIFO buffer contains the following 64 bytes:

CS_RFID = 0;                    

SET_SFRPAGE (SPI0_PAGE);

SPIF = 0;

SPI0DAT = (0x80|(0x09<<1));  // read FIFODataReg register

while (!SPIF);  // wait until transmission complete

for(i=0; i<64; i++)

{

  SPIF = 0;

  SPI0DAT = 0x00;  // Read FIFO Data

  while (!SPIF);  // wait until transmission complete

  buf[5+i] = SPI0DAT;

}

SET_SFRPAGE (CONFIG_PAGE);

CS_RFID = 1;