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simplify quick_start_example1 and add quick_start_example2

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This commit is contained in:
Philippe Teuwen 2012-11-16 12:25:27 +01:00
parent fda8d60ce0
commit 7437f76007
2 changed files with 84 additions and 3 deletions
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18
examples/doc/quick_start_example1.c
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@ -3,15 +3,27 @@
* @brief Quick start example that presents how to use libnfc
*/
// To compile this simple example:
// $ gcc -o quick_start_example1 -lnfc quick_start_example1.c
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif // HAVE_CONFIG_H
#include <stdlib.h>
#include <err.h>
#include <nfc/nfc.h>
#include "utils/nfc-utils.h"
#include "libnfc/chips/pn53x.h"
static void
print_hex(const uint8_t *pbtData, const size_t szBytes)
{
size_t szPos;
for (szPos = 0; szPos < szBytes; szPos++) {
printf("%02x ", pbtData[szPos]);
}
printf("\n");
}
int
main(int argc, const char *argv[])
@ -29,7 +41,7 @@ main(int argc, const char *argv[])
pnd = nfc_open(NULL, NULL);
if (pnd == NULL) {
ERR("%s", "Unable to open NFC device.");
warnx("ERROR: %s", "Unable to open NFC device.");
return EXIT_FAILURE;
}
// Set opened NFC device to initiator mode

69
examples/doc/quick_start_example2.c Normal file
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@ -0,0 +1,69 @@
/**
* @file quick_start_example2.c
* @brief Quick start example that presents how to use libnfc
*/
// This is same example as quick_start_example1.c but using
// some helper functions existing in libnfc.
// Those functions are not available yet in a library
// so binary object must be linked statically:
// $ gcc -o quick_start_example2 -lnfc -I../.. quick_start_example2.c ../../utils/nfc-utils.o
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif // HAVE_CONFIG_H
#include <stdlib.h>
#include <nfc/nfc.h>
#include "utils/nfc-utils.h"
int
main(int argc, const char *argv[])
{
nfc_device *pnd;
nfc_target nt;
nfc_init(NULL);
// Display libnfc version
const char *acLibnfcVersion = nfc_version();
printf("%s uses libnfc %s\n", argv[0], acLibnfcVersion);
// Open, using the first available NFC device
pnd = nfc_open(NULL, NULL);
if (pnd == NULL) {
ERR("%s", "Unable to open NFC device.");
return EXIT_FAILURE;
}
// Set opened NFC device to initiator mode
if (nfc_initiator_init(pnd) < 0) {
nfc_perror(pnd, "nfc_initiator_init");
exit(EXIT_FAILURE);
}
printf("NFC reader: %s opened\n", nfc_device_get_name(pnd));
// Poll for a ISO14443A (MIFARE) tag
const nfc_modulation nmMifare = {
.nmt = NMT_ISO14443A,
.nbr = NBR_106,
};
if (nfc_initiator_select_passive_target(pnd, nmMifare, NULL, 0, &nt) > 0) {
printf("The following (NFC) ISO14443A tag was found:\n");
printf(" ATQA (SENS_RES): ");
print_hex(nt.nti.nai.abtAtqa, 2);
printf(" UID (NFCID%c): ", (nt.nti.nai.abtUid[0] == 0x08 ? '3' : '1'));
print_hex(nt.nti.nai.abtUid, nt.nti.nai.szUidLen);
printf(" SAK (SEL_RES): ");
print_hex(&nt.nti.nai.btSak, 1);
if (nt.nti.nai.szAtsLen) {
printf(" ATS (ATR): ");
print_hex(nt.nti.nai.abtAts, nt.nti.nai.szAtsLen);
}
}
// Close NFC device
nfc_close(pnd);
nfc_exit(NULL);
return EXIT_SUCCESS;
}