ReadRFID.java

package com.liangyuen.idea.raspberryRFID;

/**
 * Created by Liang on 2016/3/7.
 */
import com.liangyuen.util.Convert;
import com.liangyuen.util.*;
import com.pi4j.io.gpio.RaspiPin;
import com.pi4j.wiringpi.Gpio;
import com.pi4j.wiringpi.Spi;
import com.liangyuen.util.FMRC522;
public class ReadRFID
{
    public static void main(String[] args) throws InterruptedException
    {
        RaspRC522 rc522=new RaspRC522();
        int back_bits[]=new int[1];
        String strUID;
        byte tagid[]=new byte[5];
        int i,status;
        byte blockaddress=8;  //读写块地址0-63
        byte sector=15,block=2;


        //读卡，得到序列号
//        if(rc522.Request(RaspRC522.PICC_REQIDL, back_bits) == rc522.MI_OK)
//            System.out.println("Detected:"+back_bits[0]);
//        if(rc522.AntiColl(tagid) != RaspRC522.MI_OK)
//        {
//            System.out.println("anticoll error");
//            return;
//        }
//
//        //Select the scanned tag，选中指定序列号的卡
//        int size=rc522.Select_Tag(tagid);
//        System.out.println("Size="+size);

        rc522.Select_MirareOne(tagid);
        strUID= Convert.bytesToHex(tagid);
        //System.out.println(strUID);
        //System.out.println("Card Read UID:" + tagid[0] + "," + tagid[1] + "," + tagid[2] + "," + tagid[3]);
        System.out.println("Card Read UID:" + strUID.substring(0,2) + "," +
                strUID.substring(2,4) + "," +
                strUID.substring(4,6) + "," +
                strUID.substring(6,8));

        //default key
        byte []keyA=new byte[]{(byte)0x03,(byte)0x03,(byte)0x00,(byte)0x01,(byte)0x02,(byte)0x03};
        byte[] keyB=new byte[]{(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};


        //Authenticate,A密钥验证卡,可以读数据块2
        byte data[]=new byte[16];
        status = rc522.Auth_Card(RaspRC522.PICC_AUTHENT1A, sector,block, keyA, tagid);
        if(status != RaspRC522.MI_OK)
        {
            System.out.println("Authenticate A error");
            return;
        }

        status=rc522.Read(sector,block,data);
        //rc522.Stop_Crypto();
        System.out.println("Successfully authenticated,Read data="+Convert.bytesToHex(data));
        status=rc522.Read(sector,(byte)3,data);
        System.out.println("Read control block data="+Convert.bytesToHex(data));


        for (i = 0; i < 16; i++)
        {
            data[i]=(byte)0x00;
        }

        //Authenticate,B密钥验证卡,可以写数据块2
        status = rc522.Auth_Card(RaspRC522.PICC_AUTHENT1B, sector,block, keyB, tagid);
        if(status != RaspRC522.MI_OK)
        {
            System.out.println("Authenticate B error");
            return;
        }

        status=rc522.Write(sector,block,data);
        if( status== RaspRC522.MI_OK)
            System.out.println("Write data finished");
        else
        {
            System.out.println("Write data error,status="+status);
            return;
        }

//        byte buff[]=new byte[16];
//
//        for (i = 0; i < 16; i++)
//        {
//            buff[i]=(byte)0;
//        }
//        status=rc522.Read(sector,block,buff);
//        if(status == RaspRC522.MI_OK)
//            System.out.println("Read Data finished");
//        else
//        {
//            System.out.println("Read data error,status="+status);
//            return;
//        }
//
//        System.out.print("sector"+sector+",block="+block+" :");
//        String strData= Convert.bytesToHex(buff);
//        for (i=0;i<16;i++)
//        {
//            System.out.print(strData.substring(i*2,i*2+2));
//            if(i < 15) System.out.print(",");
//            else System.out.println("");
//        }











    }

    public static void rfidReaderLoop(int sleeptime) throws InterruptedException
    {
        int count=0;
        while (count++ < 3)
        {

            int packetlength = 5;

            byte packet[] = new byte[packetlength];
            packet[0] = (byte) 0x80; // FIRST PACKET GETS IGNORED BUT HAS
            // TO BE SET TO READ
            packet[1] = (byte) 0x80; // ADDRESS 0 Gives data of Address 0
            packet[2] = (byte) 0x82; // ADDRESS 1 Gives data of Address 1
            packet[3] = (byte) 0x84; // ADDRESS 2 Gives data of Address 2
            packet[4] = (byte) 0x86; // ADDRESS 3 Gives data of Address 3

            System.out.println("-----------------------------------------------");
            System.out.println("Data to be transmitted:");
            System.out.println("[TX] " + bytesToHex(packet));
            System.out.println("[TX1] " + packet[1]);
            System.out.println("[TX2] " + packet[2]);
            System.out.println("[TX3] " + packet[3]);
            System.out.println("[TX4] " + packet[4]);
            System.out.println("Transmitting data...");

            // Send data to Reader and receive answerpacket.
            packet = readFromRFID(0, packet, packetlength);

            System.out.println("Data transmitted, packets received.");
            System.out.println("Received Packets (First packet to be ignored!)");
            System.out.println("[RX] " + bytesToHex(packet));
            System.out.println("[RX1] " + packet[1]);
            System.out.println("[RX2] " + packet[2]);
            System.out.println("[RX3] " + packet[3]);
            System.out.println("[RX4] " + packet[4]);
            System.out.println("-----------------------------------------------");

            if (packet.length == 0)
            {
                //Reset when no packet received
                //ResetPin.high();
                Thread.sleep(50);
                //ResetPin.low();
            }

            // Wait 1/2 second before trying to read again
            Thread.sleep(sleeptime);
        }

    }

    public static byte[] readFromRFID(int channel, byte[] packet, int length)
    {
        Spi.wiringPiSPIDataRW(channel, packet, length);

        return packet;
    }

    public static boolean writeToRFID(int channel, byte fullAddress, byte data)
    {

        byte[] packet = new byte[2];
        packet[0] = fullAddress;
        packet[1] = data;

        if (Spi.wiringPiSPIDataRW(channel, packet, 1) >= 0)
            return true;
        else
            return false;
    }

    public static String bytesToHex(byte[] bytes)
    {
        final char[] hexArray = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
                '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] hexChars = new char[bytes.length * 2];
        int v;
        for (int j = 0; j < bytes.length; j++)
        {
            v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }
}