Posted on March 11, 2015 at 16:23Hi,
I'm trying to set up a NDEF with multiple records.
// write NDEF message (command C-APDU - datasheet 5.2.1 p32)
ndef[0] = 0x02; // PCB:
ndef[1] = 0x00; // CLA: class byte
ndef[2] = 0xD6; // INS: instruction byte
ndef[3] = 0x00; // P1: param byte 1
ndef[4] = 0x02; // P2: param byte 2
ndef[5] = 5 + 5 + 7 + 5 + 1; // Lc: number of bytes of the data field
// record &sharp1
ndef[6] = 0x91; // MB | ME | CF | SR | IL | TNF
ndef[7] = 0x01; // type length
ndef[8] = 5+1; // payload length
ndef[9] = 'U'; // Type field: 'U' - URL, 'T' - text, ...
ndef[10] = 0x01; // URI identifier -> 0x01 = ''http://www.'', 0x03 = ''http://''
ndef[11]='s';
ndef[12]='t';
ndef[13]='.';
ndef[14]='d';
ndef[15]='e';
// record &sharp2
ndef[16] = 0x51; // MB | ME | CF | SR | IL | TNF
ndef[17] = 0x01; // type length
ndef[18] = 5+1; // payload length
ndef[19] = 'T'; // Type field: 'U' - URL, 'T' - text, ...
ndef[20] = 0x02; //
ndef[21] = 'e'; //
ndef[22] = 'n'; //
ndef[23]='H';
ndef[24]='a';
ndef[25]='l';
ndef[26]='l';
ndef[27]='o';
send_command(ndef, 30); // 28bytes DEF length + 2bytes CRC
delay_ms(NDEF_WRITE_DELAY);
i2c_read_n_reg_M24SR(M24SR_ADDR,0,5);
Unfortunatly the data does not get written to the M24SR chip. What is wrong?
#multiple-ndef #m24sr
