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
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