ST / NDefLib

Utility library to read and write Ndef messages from/to a Type4 NFC tag

Dependents:   NFC M2M_2016_STM32 MyongjiElec_capstone1 IDW01M1_Cloud_IBM ... more

Fork of NDefLib by ST Expansion SW Team

NDEF NFC library

This library provides an abstract API to create NDEF formatted messages and records and to read/write them from/to a Type4 NFC Tag.

Implementations

At the moment, the NDEF API is implemented by X_NUCLEO_NFC01A1 and X_NUCLEO_NFC02A1 Dynamic NFC Tag libraries respectively driving the X-NUCLEO-NFC01A1 and X-NUCLEO-NFC02A1 boards.

Message.cpp@1:a0eeb478a45a, 2015-11-24 (annotated)

Committer:
giovannivisentini
Date:
Tue Nov 24 14:33:06 2015 +0000
Revision:
1:a0eeb478a45a
Parent:
0:04b82ae7aa43
Child:
4:eaf6c49a86e4
implement tag reading

Who changed what in which revision?

UserRevisionLine numberNew contents of line
giovannivisentini 0:04b82ae7aa43 1 /*
giovannivisentini 0:04b82ae7aa43 2 * Message.cpp
giovannivisentini 0:04b82ae7aa43 3 *
giovannivisentini 0:04b82ae7aa43 4 * Created on: Nov 6, 2015
giovannivisentini 0:04b82ae7aa43 5 * Author: giovanni visentini
giovannivisentini 0:04b82ae7aa43 6 */
giovannivisentini 0:04b82ae7aa43 7
giovannivisentini 0:04b82ae7aa43 8 #include <cstdlib>
giovannivisentini 0:04b82ae7aa43 9 #include "NDefLib/Message.h"
giovannivisentini 0:04b82ae7aa43 10 #include "RecordType/EmptyRecord.h"
giovannivisentini 0:04b82ae7aa43 11 #include "RecordType/RecordText.h"
giovannivisentini 1:a0eeb478a45a 12 #include "RecordType/RecordAAR.h"
giovannivisentini 1:a0eeb478a45a 13 #include "RecordType/RecordMimeType.h"
giovannivisentini 1:a0eeb478a45a 14 #include "RecordType/RecordURI.h"
giovannivisentini 0:04b82ae7aa43 15
giovannivisentini 0:04b82ae7aa43 16 namespace NDefLib {
giovannivisentini 0:04b82ae7aa43 17
giovannivisentini 0:04b82ae7aa43 18 uint16_t Message::getByteLenght()const{
giovannivisentini 0:04b82ae7aa43 19 uint16_t lenght=2; //length size
giovannivisentini 0:04b82ae7aa43 20
giovannivisentini 0:04b82ae7aa43 21 if(mRecords.size()==0)
giovannivisentini 0:04b82ae7aa43 22 return lenght+EmptyRecord().getByteLenght();
giovannivisentini 0:04b82ae7aa43 23
giovannivisentini 0:04b82ae7aa43 24 std::vector<Record*>::const_iterator it = mRecords.begin();
giovannivisentini 0:04b82ae7aa43 25 const std::vector<Record*>::const_iterator end = mRecords.end();
giovannivisentini 0:04b82ae7aa43 26
giovannivisentini 0:04b82ae7aa43 27 for(;it!=end;++it){
giovannivisentini 0:04b82ae7aa43 28 lenght+= (*it)->getByteLenght();
giovannivisentini 0:04b82ae7aa43 29 }//for
giovannivisentini 0:04b82ae7aa43 30
giovannivisentini 0:04b82ae7aa43 31 return lenght;
giovannivisentini 0:04b82ae7aa43 32 }//getByteLenght
giovannivisentini 0:04b82ae7aa43 33
giovannivisentini 1:a0eeb478a45a 34 uint16_t Message::write(uint8_t *buffer) const {
giovannivisentini 0:04b82ae7aa43 35
giovannivisentini 0:04b82ae7aa43 36 const uint16_t length =getByteLenght()-2;
giovannivisentini 0:04b82ae7aa43 37 uint16_t offset=0;
giovannivisentini 0:04b82ae7aa43 38 buffer[offset++]=(uint8_t)((length & 0xFF00)>>8);
giovannivisentini 0:04b82ae7aa43 39 buffer[offset++]=(uint8_t)((length & 0x00FF));
giovannivisentini 0:04b82ae7aa43 40
giovannivisentini 0:04b82ae7aa43 41 const uint32_t nRecord = mRecords.size();
giovannivisentini 0:04b82ae7aa43 42
giovannivisentini 0:04b82ae7aa43 43 if(mRecords.size()==0){
giovannivisentini 0:04b82ae7aa43 44 offset += EmptyRecord().write(buffer+offset);
giovannivisentini 0:04b82ae7aa43 45 return offset;
giovannivisentini 0:04b82ae7aa43 46 }//else
giovannivisentini 0:04b82ae7aa43 47
giovannivisentini 0:04b82ae7aa43 48 for(uint32_t i=0;i<nRecord; i++){
giovannivisentini 0:04b82ae7aa43 49 Record *r = mRecords[i];
giovannivisentini 0:04b82ae7aa43 50
giovannivisentini 0:04b82ae7aa43 51 r->setAsMiddleRecord();
giovannivisentini 0:04b82ae7aa43 52 if(i==0)
giovannivisentini 0:04b82ae7aa43 53 r->setAsFirstRecord();
giovannivisentini 0:04b82ae7aa43 54 if(i==nRecord-1)
giovannivisentini 0:04b82ae7aa43 55 r->setAsLastRecord();
giovannivisentini 0:04b82ae7aa43 56
giovannivisentini 0:04b82ae7aa43 57 offset+= r->write(buffer+offset);
giovannivisentini 0:04b82ae7aa43 58 }//for
giovannivisentini 0:04b82ae7aa43 59
giovannivisentini 0:04b82ae7aa43 60 return offset;
giovannivisentini 0:04b82ae7aa43 61 }//write
giovannivisentini 0:04b82ae7aa43 62
giovannivisentini 1:a0eeb478a45a 63 void Message::parseMessage(const uint8_t *const rawNdefFile,
giovannivisentini 1:a0eeb478a45a 64 const uint8_t length,Message *msg){
giovannivisentini 1:a0eeb478a45a 65 uint16_t offset=0;
giovannivisentini 1:a0eeb478a45a 66 Record *r;
giovannivisentini 0:04b82ae7aa43 67
giovannivisentini 1:a0eeb478a45a 68 Record::RecordHeader header;
giovannivisentini 0:04b82ae7aa43 69 do{
giovannivisentini 1:a0eeb478a45a 70 const uint8_t headerLenght = header.loadHeader(rawNdefFile+offset);
giovannivisentini 1:a0eeb478a45a 71 r = RecordText::parse(header,rawNdefFile+offset+headerLenght);
giovannivisentini 1:a0eeb478a45a 72 if(r==NULL)
giovannivisentini 1:a0eeb478a45a 73 r = RecordAAR::parse(header,rawNdefFile+offset+headerLenght);
giovannivisentini 1:a0eeb478a45a 74 if(r==NULL)
giovannivisentini 1:a0eeb478a45a 75 r = RecordMimeType::parse(header,rawNdefFile+offset+headerLenght);
giovannivisentini 1:a0eeb478a45a 76 if(r==NULL)
giovannivisentini 1:a0eeb478a45a 77 r = RecordURI::parse(header,rawNdefFile+offset+headerLenght);
giovannivisentini 0:04b82ae7aa43 78
giovannivisentini 1:a0eeb478a45a 79 offset += header.getRecordLength();
giovannivisentini 1:a0eeb478a45a 80 msg->addRecord(r);
giovannivisentini 1:a0eeb478a45a 81 }while(offset<length);
giovannivisentini 0:04b82ae7aa43 82
giovannivisentini 0:04b82ae7aa43 83 }
giovannivisentini 0:04b82ae7aa43 84
giovannivisentini 0:04b82ae7aa43 85
giovannivisentini 0:04b82ae7aa43 86 } /* namespace NDefLib */