/*
 * Author: Stefan Andritoiu <stefan.andritoiu@gmail.com>
 * Copyright (c) 2017 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
 */

public class PN532_Example {

	public static void main(String[] args) throws InterruptedException {
		// ! [Interesting]
		// Instantiate an PN532 on I2C bus 0 (default) using gpio 3 for the
		// IRQ, and gpio 2 for the reset pin.

		upm_pn532.PN532 nfc = new upm_pn532.PN532(3, 2);

		if (!nfc.init())
			System.out.println("init() failed");

		long vers = nfc.getFirmwareVersion();

		if (vers != 0)
			System.out.println("Got firmware version: " + String.format("0x%08x", vers));
		else {
			System.out.println("Could not identify PN532\n");
			return;
		}

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

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

		nfc.SAMConfig();

		short[] uidSize = new short[1];
		byte[] uid = new byte[7];

		while (true) {
			if (nfc.readPassiveTargetID(PN532.BAUD_T.BAUD_MIFARE_ISO14443A, uid, uidSize, 2000)) {
				// found a card
				System.out.println("Found a card: UID len " + uidSize[0]);
				System.out.print("UID: ");

				for (int i = 0; i < uidSize[0]; i++)
					System.out.print(String.format("%02x", uid[i]) + " ");

				System.out.println("\nSAK: " + String.format("0x%02x", nfc.getSAK()));
				System.out.println("ATQA: " + String.format("0x%04x\n\n", nfc.getATQA()));

				Thread.sleep(1000);
			} else {
				System.out.println("Waiting for a card...");
			}
		}

		// ! [Interesting]
	}
}