libnfc/examples/doc/quick_start_example1.c

61 lines
1.8 KiB
C

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif // HAVE_CONFIG_H
#include <stdlib.h>
#include <nfc/nfc.h>
#include <nfc/nfc-messages.h>
int
main (int argc, const char *argv[])
{
nfc_device_t *pnd;
nfc_target_info_t nti;
// Display libnfc version
const char *acLibnfcVersion = nfc_version ();
printf ("%s use libnfc %s\n", argv[0], acLibnfcVersion);
// Connect using the first available NFC device
pnd = nfc_connect (NULL);
if (pnd == NULL) {
ERR ("%s", "Unable to connect to NFC device.");
return EXIT_FAILURE;
}
// Set connected NFC device to initiator mode
nfc_initiator_init (pnd);
// Drop the field for a while
nfc_configure (pnd, NDO_ACTIVATE_FIELD, false);
// Let the reader only try once to find a tag
nfc_configure (pnd, NDO_INFINITE_SELECT, false);
// Configure the CRC and Parity settings
nfc_configure (pnd, NDO_HANDLE_CRC, true);
nfc_configure (pnd, NDO_HANDLE_PARITY, true);
// Enable field so more power consuming cards can power themselves up
nfc_configure (pnd, NDO_ACTIVATE_FIELD, true);
printf ("Connected to NFC reader: %s\n", pnd->acName);
// Poll for a ISO14443A (MIFARE) tag
if (nfc_initiator_select_passive_target (pnd, NM_ISO14443A_106, NULL, 0, &nti)) {
printf ("The following (NFC) ISO14443A tag was found:\n");
printf (" ATQA (SENS_RES): ");
print_hex (nti.nai.abtAtqa, 2);
printf (" UID (NFCID%c): ", (nti.nai.abtUid[0] == 0x08 ? '3' : '1'));
print_hex (nti.nai.abtUid, nti.nai.szUidLen);
printf (" SAK (SEL_RES): ");
print_hex (&nti.nai.btSak, 1);
if (nti.nai.szAtsLen) {
printf (" ATS (ATR): ");
print_hex (nti.nai.abtAts, nti.nai.szAtsLen);
}
}
// Disconnect from NFC device
nfc_disconnect (pnd);
return EXIT_SUCCESS;
}