android nci architecture

abbreviation and packages

full name	abbreviation
Message Type	(MT)
Packet Boundary Flag	(PBF)
Group Identifier	(GID)
Opcode Identifier	(OID)
Payload Length	(L)

control_packet_structure.png data_packets.png

method nfc_ncif_process_event get message type, packet boundary flag,group id,opcode id, payload length:

bool nfc_ncif_process_event(NFC_HDR* p_msg) {
...
  p = (uint8_t*)(p_msg + 1) + p_msg->offset;
  pp = p;
  NCI_MSG_PRS_HDR0(pp, mt, pbf, gid);
  oid = ((*pp) & NCI_OID_MASK);
...

it's called by nfc_task, here is nfc_task control flow

nfc_task.png

rf architecture

rf_interface_architecture.png