upm/examples/c++/pn532.cxx

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * This program and the accompanying materials are made available under the
 * terms of the The MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 */

#include <iostream>
#include <signal.h>
#include <stdio.h>
#include <string.h>

#include "pn532.hpp"
#include "upm_utilities.h"

using namespace std;

bool shouldRun = true;

void
sig_handler(int signo)
{
    if (signo == SIGINT)
        shouldRun = false;
}

int
main(int argc, char** argv)
{
    signal(SIGINT, sig_handler);

    //! [Interesting]
    // Instantiate an PN532 on I2C bus 0 (default) using gpio 3 for the
    // IRQ, and gpio 2 for the reset pin.

    upm::PN532 nfc(3, 2);

    if (!nfc.init())
        cerr << "init() failed" << endl;

    uint32_t vers = nfc.getFirmwareVersion();

    if (vers)
        printf("Got firmware version: 0x%08x\n", vers);
    else {
        printf("Could not identify PN532\n");
        return 1;
    }

    // Now scan and identify any cards that come in range (1 for now)

    // Retry forever
    nfc.setPassiveActivationRetries(0xff);

    nfc.SAMConfig();

    uint8_t uidSize;
    uint8_t uid[7];

    while (shouldRun) {
        memset(uid, 0, 7);
        if (nfc.readPassiveTargetID(nfc.BAUD_MIFARE_ISO14443A, uid, &uidSize, 2000)) {
            // found a card
            printf("Found a card: UID len %d\n", uidSize);
            printf("UID: ");
            for (int i = 0; i < uidSize; i++)
                printf("%02x ", uid[i]);
            printf("\n");
            printf("SAK: 0x%02x\n", nfc.getSAK());
            printf("ATQA: 0x%04x\n\n", nfc.getATQA());
            upm_delay(1);
        } else {
            printf("Waiting for a card...\n");
        }
    }

    //! [Interesting]

    return 0;
}