AN4430 datasheet(35/42 Pages) STMICROELECTRONICS

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AN4430

How to use ST NFC package to implement HW enhanced features

At this stage, the whole CC file is stored in the buffer set in requestReadBinary’s parameter.

Current activity may then parse the buffer to fill a CCFile structured object:

private static final byte[] readBinary = new byte [] {(byte) 0x00, (byte) 0xB0,

(byte) 0x00, (byte) 0x00, (byte) 0x00};

private int requestReadBinary(int size, byte [] buffer)

{

byte[] transcieveAnswer = new byte[] { (byte) 0x00 };

if (isoDepCurrentTag == null)

isoDepCurrentTag = IsoDep.get(this.currentTag);

int cpt = 0;

byte[] readcmd = new byte[readBinary.length];

System.arraycopy(readBinary, 0, readcmd, 0, readBinary.length);

readcmd[4] = (byte) (size & 0xFF);

try {

if (!isoDepCurrentTag.isConnected())

{

isoDepCurrentTag.connect();

isoDepCurrentTag.setTimeout(20);

}

transcieveAnswer = isoDepCurrentTag.transceive(readcmd);

if (transcieveAnswer[size] == (byte) 0x90 &&

transcieveAnswer[size+1] == (byte) 0x00)

{

System.arraycopy(transcieveAnswer, 0, buffer, 0,

size);

return 1;

}

else

{

cpt++;

return 0;

}

} catch (IOException e) {

// TODO Auto‐generated catch block

e.printStackTrace();

throw new RuntimeException("fail", e);

}

_CCHandler = new stnfccchandler(CCBinary);

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