libNFC는 READ, WRITE 및 COMP_WRITE 만 지원합니다.

Question

일주일 전에 NFC 리더 (PN532 I2C)와 5 개의 NFC 태그 (NTAG216)를 구입했습니다. 목표는 Java 인터페이스를 만드는 것이므로 프로젝트에 Java를 사용할 수 있습니다. . 인터페이스가 예상대로 작동하지만 NTAG216이 지원하는 모든 명령 (NTAG216 data sheet 32 페이지)을 시도하면 읽기, 쓰기 및 COMP_WRITE 만 작동합니다. 이 인터페이스에 의해 발생하지 않습니다, 나는 또한 C에서 시도했지만, 동일한 결과. 그래서, 내 명령에 어떤 실수가 있습니까? 아니면 libNFC가 어떤 식 으로든이 명령들이 실행되는 것을 방지합니까?
나쁜 영어로 유감스럽게 생각합니다. 제 문제가 여전히 이해되기를 바랍니다. 귀하의 답변

감사합니다,
야콥


강령 :

public class Main { 

    public static void main(String[] args) { 
    System.load(new File("libNFC-JavaInterface.so").getAbsolutePath()); 
    Context context = new Context(); 
    Device device = new Device(context); 
    Target target = new Target(); 
    device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), null, 
     target); 
    int[] response; 

    System.out.print("UID: "); 
    try { 
     System.out.printf("%014X", getUID(device)); 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Version: "); 
    try { 
     response = getVersion(device); 
     for (int i = 0; i < response.length; i++) { 
     System.out.printf("%02X", response[i]); 
     } 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Read: "); 
    try { 
     response = read(device, 0x08); 
     for (int i = 0; i < response.length; i++) { 
     System.out.printf("%02X", response[i]); 
     } 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Fast Read: "); 
    try { 
     response = fastRead(device, 0x08, 0x11); 
     for (int i = 0; i < response.length; i++) { 
     System.out.printf("%02X", response[i]); 
     } 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Write: "); 
    try { 
     write(device, 0x08, new int[] {0x41, 0x42, 0x43, 0x44}); 
     System.out.print("SUCCESSFUL"); 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Compatibility Write: "); 
    try { 
     compatibilityWrite(device, 0x09, new int[] {0x45, 0x46, 0x47, 0x48}); 
     System.out.print("SUCCESSFUL"); 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Read cnt: "); 
    try { 
     response = readCnt(device); 
     for (int i = 0; i < response.length; i++) { 
     System.out.printf("%02X", response[i]); 
     } 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    System.out.print("Read sig: "); 
    try { 
     response = readSig(device); 
     for (int i = 0; i < response.length; i++) { 
     System.out.printf("%02X", response[i]); 
     } 
    } catch (NFCException e) { 
     device.selectPassiveTarget(new Modulation(ModulationType.NMT_ISO14443A, BaudRate.NBR_106), 
      null, target); 
     System.out.print("FAILED"); 
    } 
    System.out.println(); 

    target.free(); 
    device.close(); 
    context.exit(); 
    } 

    public static long getUID(Device device) throws NFCException { 
    int[] response = read(device, 0x00); 
    return (long) response[0] << 48 | (long) response[1] << 40 | (long) response[2] << 32 
     | (long) response[4] << 24 | (long) response[5] << 16 | (long) response[6] << 8 
     | (long) response[7] << 0; 
    } 

    public static int[] getVersion(Device device) throws NFCException { 
    int[] response = new int[8]; 
    device.transceiveBytes(new int[] {0x60}, response, -1); 
    return response; 
    } 

    public static int[] read(Device device, int startPage) throws NFCException { 
    int[] response = new int[16]; 
    device.transceiveBytes(new int[] {0x30, startPage & 0xFF}, response, -1); 
    return response; 
    } 

    public static int[] fastRead(Device device, int startPage, int endPage) throws NFCException { 
    int[] response = new int[((endPage &= 0xFF) - (startPage &= 0xFF) + 1) * 4]; 
    device.transceiveBytes(new int[] {0x3A, startPage, endPage}, response, -1); 
    return response; 
    } 

    public static void write(Device device, int startPage, int[] data) throws NFCException { 
    int[] command = new int[6]; 
    command[0] = 0xA2; 
    command[1] = startPage & 0xFF; 
    for (int i = 0; i < data.length; i++) { 
     command[2 + i] = data[i] & 0xFF; 
    } 
    device.transceiveBytes(command, new int[0], -1); 
    } 

    public static void compatibilityWrite(Device device, int startPage, int[] data) 
     throws NFCException { 
    int[] command = new int[18]; 
    command[0] = 0xA0; 
    command[1] = startPage & 0xFF; 
    for (int i = 0; i < data.length; i++) { 
     command[2 + i] = data[i] & 0xFF; 
    } 
    device.transceiveBytes(command, new int[0], -1); 
    } 

    public static int[] readCnt(Device device) throws NFCException { 
    int[] response = new int[3]; 
    device.transceiveBytes(new int[] {0x39, 0x02}, response, -1); 
    return response; 
    } 

    public static int[] readSig(Device device) throws NFCException { 
    int[] response = new int[32]; 
    device.transceiveBytes(new int[] {0x3C, 0x00}, response, -1); 
    return response; 
    } 
} 

그리고 출력 다음

UID: 04675362D55681 
Version: error libnfc.driver.pn532_i2c Application level error detected (127) 
FAILED 
Read: 41424344454647480000000000000000 
Fast Read: error libnfc.driver.pn532_i2c Application level error detected (127) 
FAILED 
Write: SUCCESSFUL 
Compatibility Write: SUCCESSFUL 
Read cnt: error libnfc.driver.pn532_i2c Application level error detected (127) 
FAILED 
Read sig: error libnfc.driver.pn532_i2c Application level error detected (127) 
FAILED 

Answer 1

내가 libNFC으로 시도하지 않았지만, 내 코드에서 동일한 문제가 발생 했으므로 아마 같은 문제 일 것입니다 ...

NTAG2xx 특정 기능 (GET_VERSION, FAST_READ, READ_CNT, READ_SIG)의 경우 "InDataExchange"(0x40)가 아닌 "InCommunicateThru"(0x42) PN532 기능을 사용해야합니다. 이것은 표준 NFC 포럼 기능 (READ, WRITE)에서만 작동합니다.