Luke Beach / Mbed 2 deprecated Nfctest2

Uses PN532 to get the UID of an nfc card and (try to) compare it with a default value

Dependencies:   LibPN532 mbed

main.cpp@0:9d2afe43dcf1, 2018-10-20 (annotated)

Committer:
co657_lb580
Date:
Sat Oct 20 13:39:41 2018 +0000
Revision:
0:9d2afe43dcf1
Initial commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
co657_lb580 0:9d2afe43dcf1 1 #include "PN532_I2C.h"
co657_lb580 0:9d2afe43dcf1 2 #include "PN532.h"
co657_lb580 0:9d2afe43dcf1 3 #include <inttypes.h>
co657_lb580 0:9d2afe43dcf1 4 #include "mbed.h"
co657_lb580 0:9d2afe43dcf1 5
co657_lb580 0:9d2afe43dcf1 6
co657_lb580 0:9d2afe43dcf1 7 DigitalOut ledBrd (LED1); // arducleo onboard led
co657_lb580 0:9d2afe43dcf1 8
co657_lb580 0:9d2afe43dcf1 9 DigitalOut ledNFC (LED2); // status led
co657_lb580 0:9d2afe43dcf1 10
co657_lb580 0:9d2afe43dcf1 11 DigitalOut rstNFC (D4); // pn532 chip reset control
co657_lb580 0:9d2afe43dcf1 12
co657_lb580 0:9d2afe43dcf1 13 Serial pc(USBTX, USBRX);
co657_lb580 0:9d2afe43dcf1 14
co657_lb580 0:9d2afe43dcf1 15
co657_lb580 0:9d2afe43dcf1 16 // ----------------------------------------- I2C
co657_lb580 0:9d2afe43dcf1 17 I2C pn532_i2c (I2C_SDA, I2C_SCL);
co657_lb580 0:9d2afe43dcf1 18 PN532_I2C pn532_if (pn532_i2c);
co657_lb580 0:9d2afe43dcf1 19
co657_lb580 0:9d2afe43dcf1 20 int acceptedCard = 1232695128;
co657_lb580 0:9d2afe43dcf1 21
co657_lb580 0:9d2afe43dcf1 22 PN532 nfc(pn532_if);
co657_lb580 0:9d2afe43dcf1 23
co657_lb580 0:9d2afe43dcf1 24 /*==============================================================================
co657_lb580 0:9d2afe43dcf1 25 * \brief reset the pn532 chip
co657_lb580 0:9d2afe43dcf1 26 */
co657_lb580 0:9d2afe43dcf1 27 void reset_chip (void)
co657_lb580 0:9d2afe43dcf1 28 {
co657_lb580 0:9d2afe43dcf1 29 rstNFC = 0;
co657_lb580 0:9d2afe43dcf1 30 wait_ms (100);
co657_lb580 0:9d2afe43dcf1 31 rstNFC = 1;
co657_lb580 0:9d2afe43dcf1 32 }
co657_lb580 0:9d2afe43dcf1 33
co657_lb580 0:9d2afe43dcf1 34
co657_lb580 0:9d2afe43dcf1 35 /*==============================================================================
co657_lb580 0:9d2afe43dcf1 36 * \brief init the peripheral
co657_lb580 0:9d2afe43dcf1 37 */
co657_lb580 0:9d2afe43dcf1 38 void setup(void)
co657_lb580 0:9d2afe43dcf1 39 {
co657_lb580 0:9d2afe43dcf1 40 ledBrd = 0;
co657_lb580 0:9d2afe43dcf1 41 ledNFC = 0;
co657_lb580 0:9d2afe43dcf1 42 reset_chip ();
co657_lb580 0:9d2afe43dcf1 43
co657_lb580 0:9d2afe43dcf1 44 uint32_t versiondata = 0;
co657_lb580 0:9d2afe43dcf1 45 pc.baud(115200);
co657_lb580 0:9d2afe43dcf1 46 pc.printf ("Hello!\n");
co657_lb580 0:9d2afe43dcf1 47
co657_lb580 0:9d2afe43dcf1 48 while (1) {
co657_lb580 0:9d2afe43dcf1 49 nfc.begin();
co657_lb580 0:9d2afe43dcf1 50 nfc.SAMConfig();
co657_lb580 0:9d2afe43dcf1 51 versiondata = nfc.getFirmwareVersion();
co657_lb580 0:9d2afe43dcf1 52 if (! versiondata) {
co657_lb580 0:9d2afe43dcf1 53 pc.printf("Didn't find PN53x board\n\n");
co657_lb580 0:9d2afe43dcf1 54 wait_ms(500);
co657_lb580 0:9d2afe43dcf1 55 } else {
co657_lb580 0:9d2afe43dcf1 56 break;
co657_lb580 0:9d2afe43dcf1 57 }
co657_lb580 0:9d2afe43dcf1 58 }
co657_lb580 0:9d2afe43dcf1 59
co657_lb580 0:9d2afe43dcf1 60 // Got ok data, print it out!
co657_lb580 0:9d2afe43dcf1 61 pc.printf ("Found chip PN5%02X , Firmware ver. %d.%d\n",
co657_lb580 0:9d2afe43dcf1 62 (versiondata>>24) & 0xFF,
co657_lb580 0:9d2afe43dcf1 63 (versiondata>>16) & 0xFF,
co657_lb580 0:9d2afe43dcf1 64 (versiondata>>8) & 0xFF);
co657_lb580 0:9d2afe43dcf1 65
co657_lb580 0:9d2afe43dcf1 66 // Set the max number of retry attempts to read from a card
co657_lb580 0:9d2afe43dcf1 67 // This prevents us from waiting forever for a card, which is
co657_lb580 0:9d2afe43dcf1 68 // the default behaviour of the PN532.
co657_lb580 0:9d2afe43dcf1 69 nfc.setPassiveActivationRetries(0xFF);
co657_lb580 0:9d2afe43dcf1 70
co657_lb580 0:9d2afe43dcf1 71 // configure board to read RFID tags
co657_lb580 0:9d2afe43dcf1 72 nfc.SAMConfig();
co657_lb580 0:9d2afe43dcf1 73
co657_lb580 0:9d2afe43dcf1 74 pc.printf ("\nWaiting for an ISO14443A card\n");
co657_lb580 0:9d2afe43dcf1 75 }
co657_lb580 0:9d2afe43dcf1 76
co657_lb580 0:9d2afe43dcf1 77
co657_lb580 0:9d2afe43dcf1 78 /*==============================================================================
co657_lb580 0:9d2afe43dcf1 79 * \brief find a tag
co657_lb580 0:9d2afe43dcf1 80 */
co657_lb580 0:9d2afe43dcf1 81 void loop(void)
co657_lb580 0:9d2afe43dcf1 82 {
co657_lb580 0:9d2afe43dcf1 83 bool success;
co657_lb580 0:9d2afe43dcf1 84 uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
co657_lb580 0:9d2afe43dcf1 85 uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
co657_lb580 0:9d2afe43dcf1 86
co657_lb580 0:9d2afe43dcf1 87 // configure board to read RFID tags
co657_lb580 0:9d2afe43dcf1 88 nfc.SAMConfig();
co657_lb580 0:9d2afe43dcf1 89
co657_lb580 0:9d2afe43dcf1 90 // Wait for an ISO14443A type cards (Mifare, etc.). When one is found
co657_lb580 0:9d2afe43dcf1 91 // 'uid' will be populated with the UID, and uidLength will indicate
co657_lb580 0:9d2afe43dcf1 92 // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
co657_lb580 0:9d2afe43dcf1 93 success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);
co657_lb580 0:9d2afe43dcf1 94
co657_lb580 0:9d2afe43dcf1 95 printf ("\n");
co657_lb580 0:9d2afe43dcf1 96
co657_lb580 0:9d2afe43dcf1 97 if (success) {
co657_lb580 0:9d2afe43dcf1 98 ledNFC = 1; // led on
co657_lb580 0:9d2afe43dcf1 99
co657_lb580 0:9d2afe43dcf1 100 pc.printf("Found a card!\n");
co657_lb580 0:9d2afe43dcf1 101
co657_lb580 0:9d2afe43dcf1 102 pc.printf("UID Length: %d bytes\n", uidLength);
co657_lb580 0:9d2afe43dcf1 103 pc.printf("UID Value: ");
co657_lb580 0:9d2afe43dcf1 104 //int id = 0; //create a variable to build the user id into
co657_lb580 0:9d2afe43dcf1 105 for (uint8_t i=0; i < uidLength; i++)
co657_lb580 0:9d2afe43dcf1 106 {
co657_lb580 0:9d2afe43dcf1 107 pc.printf("%d",uid[i]);
co657_lb580 0:9d2afe43dcf1 108 }
co657_lb580 0:9d2afe43dcf1 109 pc.printf("\r\n");
co657_lb580 0:9d2afe43dcf1 110
co657_lb580 0:9d2afe43dcf1 111
co657_lb580 0:9d2afe43dcf1 112 /* COMPUTER SCIENCE GROUP CHAT OPTION
co657_lb580 0:9d2afe43dcf1 113 int result = 0;
co657_lb580 0:9d2afe43dcf1 114 for (int i = 0; i < uidLength; i++) {
co657_lb580 0:9d2afe43dcf1 115 result = result + (uid[i] * pow(10.0, (uidLength-i)-1));
co657_lb580 0:9d2afe43dcf1 116 }
co657_lb580 0:9d2afe43dcf1 117 pc.printf("Result: %d \r\n",result);
co657_lb580 0:9d2afe43dcf1 118 */
co657_lb580 0:9d2afe43dcf1 119
co657_lb580 0:9d2afe43dcf1 120 // DAVID BARNES OPTION
co657_lb580 0:9d2afe43dcf1 121 unsigned long sum = 0;
co657_lb580 0:9d2afe43dcf1 122 for(int i = 0; i < sizeof(uid) / sizeof(*uid); i++) {
co657_lb580 0:9d2afe43dcf1 123 sum = (sum * 10) + uid[i];
co657_lb580 0:9d2afe43dcf1 124 }
co657_lb580 0:9d2afe43dcf1 125 printf("Sum: %lu", sum);
co657_lb580 0:9d2afe43dcf1 126
co657_lb580 0:9d2afe43dcf1 127 /* ONLINE FORUM OPTION
co657_lb580 0:9d2afe43dcf1 128 uint32_t cardidentifier = 0;
co657_lb580 0:9d2afe43dcf1 129 cardidentifier = uid[0];
co657_lb580 0:9d2afe43dcf1 130 cardidentifier >>= 8; cardidentifier |= uid[1];
co657_lb580 0:9d2afe43dcf1 131 cardidentifier >>= 8; cardidentifier |= uid[2];
co657_lb580 0:9d2afe43dcf1 132 cardidentifier >>= 8; cardidentifier |= uid[3];
co657_lb580 0:9d2afe43dcf1 133 pc.printf("My number: %u \r\n",cardidentifier);
co657_lb580 0:9d2afe43dcf1 134 */
co657_lb580 0:9d2afe43dcf1 135 pc.printf("Correct number %u \r\n", acceptedCard);
co657_lb580 0:9d2afe43dcf1 136
co657_lb580 0:9d2afe43dcf1 137 wait_ms (100);
co657_lb580 0:9d2afe43dcf1 138 ledNFC = 0; //turn off red and turn on green
co657_lb580 0:9d2afe43dcf1 139 //green led to show it is the right card
co657_lb580 0:9d2afe43dcf1 140 // wait until the card is taken away
co657_lb580 0:9d2afe43dcf1 141 while (nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength, 500)) {}
co657_lb580 0:9d2afe43dcf1 142
co657_lb580 0:9d2afe43dcf1 143 ledNFC = 0; // led off
co657_lb580 0:9d2afe43dcf1 144 } else {
co657_lb580 0:9d2afe43dcf1 145 // PN532 probably timed out waiting for a card
co657_lb580 0:9d2afe43dcf1 146 pc.printf("\nTimed out waiting for a card\n");
co657_lb580 0:9d2afe43dcf1 147 ledNFC = 0;
co657_lb580 0:9d2afe43dcf1 148 wait_ms (200);
co657_lb580 0:9d2afe43dcf1 149 }
co657_lb580 0:9d2afe43dcf1 150 }
co657_lb580 0:9d2afe43dcf1 151
co657_lb580 0:9d2afe43dcf1 152
co657_lb580 0:9d2afe43dcf1 153 /*==============================================================================
co657_lb580 0:9d2afe43dcf1 154 * \brief main entry
co657_lb580 0:9d2afe43dcf1 155 */
co657_lb580 0:9d2afe43dcf1 156 int main()
co657_lb580 0:9d2afe43dcf1 157 {
co657_lb580 0:9d2afe43dcf1 158 setup();
co657_lb580 0:9d2afe43dcf1 159
co657_lb580 0:9d2afe43dcf1 160 while (1)
co657_lb580 0:9d2afe43dcf1 161 loop ();
co657_lb580 0:9d2afe43dcf1 162 }