tweekd_nfc.ino
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#include <SPI.h>
#include <PN532_SPI.h>
#include "PN532.h"
#define MODEL_QUERY 0x80
#define SERIAL_ERROR 0x55
#define NFC_TAGQUERY 0x82
#define NFC_TAGQUERY_UID 0x84
#define NFC_ARDUINO 0x02
#define NFC_NOTAG 0x81
#define NFC_TYPE_PROFESSOR 0x00
#define NFC_TYPE_STUDENT 0x01
boolean tagDetected;
boolean tagType;
PN532_SPI pn532spi(SPI, 10);
PN532 nfc(pn532spi);
void setup(void)
{
int ser;
Serial.begin(115200);
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if(!versiondata)
{
Serial.print(SERIAL_ERROR);
while (1);
}
nfc.SAMConfig();
tagDetected = false;
do
{
while(!(Serial.available() > 0));
ser = Serial.read();
if(ser == MODEL_QUERY)
Serial.print(NFC_ARDUINO);
else
Serial.print(SERIAL_ERROR);
}while(ser != MODEL_QUERY);
}
void loop(void)
{
uint8_t success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
uint8_t uidLength;
uint8_t data1[16];
uint8_t data2[16];
uint8_t dataf[8];
int ser;
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
if(success && !tagDetected)
{
if(uidLength == 4)
{
uint8_t keya[6] = { 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5 };
success = nfc.mifareclassic_AuthenticateBlock(uid, uidLength, 44, 0, keya);
if(success)
{
success = nfc.mifareclassic_ReadDataBlock(44, data1);
if(success)
{
//nfc.PrintHexChar(data1, 16);
success = nfc.mifareclassic_ReadDataBlock(45, data2);
if(success)
{
tagDetected = true;
if(data1[4] == data1[15] &&
data1[5] == data2[0] &&
data1[6] == data2[1] &&
data1[7] == data2[2] &&
data1[8] == data2[3] &&
data1[9] == data2[4])
{
tagType = NFC_TYPE_PROFESSOR;
dataf[0] = data1[4];
dataf[1] = data1[5];
dataf[2] = data1[6];
dataf[3] = data1[7];
dataf[4] = data1[8];
dataf[5] = data1[9];
}
else
{
tagType = NFC_TYPE_STUDENT;
dataf[0] = data1[15];
dataf[1] = data2[0];
dataf[2] = data2[1];
dataf[3] = data2[2];
dataf[4] = data2[3];
dataf[5] = data2[4];
dataf[6] = data2[5];
dataf[7] = data2[6];
}
}
}
}
}
}
else if(tagDetected)
{
while(!(Serial.available() > 0));
ser = Serial.read();
if(ser == NFC_TAGQUERY)
Serial.print(tagType);
else if(ser == NFC_TAGQUERY_UID)
{
Serial.print((char) dataf[0]);
Serial.print((char) dataf[1]);
Serial.print((char) dataf[2]);
Serial.print((char) dataf[3]);
Serial.print((char) dataf[4]);
Serial.print((char) dataf[5]);
if(tagType == NFC_TYPE_STUDENT)
{
Serial.print((char) dataf[6]);
Serial.print((char) dataf[7]);
}
}
else
Serial.print(SERIAL_ERROR);
}
else
{
if(Serial.available() > 0)
if(Serial.read() == NFC_TAGQUERY)
Serial.print(NFC_NOTAG);
}
}