Thanks a lot for your help Sir! I am using Samsung google Nexus 4 phone as a reader. Sir I will surely take the logic analyzer shots and I will send it to you. Actually this is the ATQB packet which is being sent when REQB is received:
buffer[0] = 12; // Length
buffer[1] = 0x50; // ATQB Start Byte
// NFCID 3:0
buffer[2] = TargetCID[0];(0x08)
buffer[3] = TargetCID[1];(0x12)
buffer[4] = TargetCID[2];(0x34)
buffer[5] = TargetCID[3];(0x56)
// Application Data Bytes
buffer[6] = 0x40; // AFI - Public Telephony, GSM ... ( See ISO14443-3 Table 12 AFI Coding)
buffer[7] = 0xE2; // CRC_B
buffer[8] = 0xAF; // CRC_B
buffer[9] = 0x11; // # of applications (1)
// Protocol Info Bytes
buffer[10] = 0x00; // Date Rate Capability ( Only Support 106 kbps)
// Max Frame/Protocol type (128 bytes / PICC compliant to -4)
buffer[11] = 0x71;
// (FWI/ADC/FO) ( FWT = 77.3mSec, ADC = coded according to AFI, CID supported)
buffer[12] = 0x85;
I don't think anything is wrong in this, Please Sir tell me if you can see anything wrong in this ATQB packet.
I will send you the logic analyzer shots as soon as possible.Thanks once again!