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.

RecordType/RecordAAR.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 * RecordAAR.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
giovannivisentini 0:04b82ae7aa43 9 #include <cstring>
giovannivisentini 1:a0eeb478a45a 10 #include "RecordAAR.h"
giovannivisentini 0:04b82ae7aa43 11
giovannivisentini 0:04b82ae7aa43 12 namespace NDefLib {
giovannivisentini 0:04b82ae7aa43 13
giovannivisentini 1:a0eeb478a45a 14 const char RecordAAR::sRecordType[] = {'a','n','d','r','o','i','d','.','c','o','m',':','p','k','g'};
giovannivisentini 0:04b82ae7aa43 15
giovannivisentini 0:04b82ae7aa43 16 RecordAAR::RecordAAR(const std::string &packageName):mPackageName(packageName){
giovannivisentini 1:a0eeb478a45a 17 mRecordHeader.setFNT(RecordHeader::NFC_external);
giovannivisentini 1:a0eeb478a45a 18 mRecordHeader.setTypeLength(sizeof(sRecordType));
giovannivisentini 0:04b82ae7aa43 19 mRecordHeader.setPlayloadLenght(mPackageName.size());
giovannivisentini 0:04b82ae7aa43 20
giovannivisentini 0:04b82ae7aa43 21 }
giovannivisentini 0:04b82ae7aa43 22
giovannivisentini 0:04b82ae7aa43 23
giovannivisentini 0:04b82ae7aa43 24 uint16_t RecordAAR::write(uint8_t *buffer){
giovannivisentini 0:04b82ae7aa43 25 uint16_t offset=0;
giovannivisentini 0:04b82ae7aa43 26 offset += mRecordHeader.writeHeader(buffer);
giovannivisentini 1:a0eeb478a45a 27 std::memcpy(buffer+offset,sRecordType,sizeof(sRecordType));
giovannivisentini 1:a0eeb478a45a 28 offset +=sizeof(sRecordType);
giovannivisentini 0:04b82ae7aa43 29 std::memcpy(buffer+offset,mPackageName.c_str(),mPackageName.size());
giovannivisentini 0:04b82ae7aa43 30 offset +=mPackageName.size();
giovannivisentini 0:04b82ae7aa43 31 return offset;
giovannivisentini 0:04b82ae7aa43 32 }
giovannivisentini 0:04b82ae7aa43 33
giovannivisentini 1:a0eeb478a45a 34 RecordAAR* RecordAAR::parse(const Record::RecordHeader &header,
giovannivisentini 1:a0eeb478a45a 35 const uint8_t *buffer){
giovannivisentini 1:a0eeb478a45a 36 uint8_t offset=0;
giovannivisentini 1:a0eeb478a45a 37 if( (header.getFNT()!=RecordHeader::NFC_external) &&
giovannivisentini 1:a0eeb478a45a 38 (header.getTypeLenght()!=sizeof(sRecordType)) ){
giovannivisentini 1:a0eeb478a45a 39 return NULL;
giovannivisentini 1:a0eeb478a45a 40 }//else
giovannivisentini 1:a0eeb478a45a 41
giovannivisentini 1:a0eeb478a45a 42 if(std::memcmp(buffer+offset,sRecordType,sizeof(sRecordType))!=0){
giovannivisentini 1:a0eeb478a45a 43 return NULL;
giovannivisentini 1:a0eeb478a45a 44 }//else tagType == android.com:pkg
giovannivisentini 1:a0eeb478a45a 45
giovannivisentini 1:a0eeb478a45a 46 offset+=sizeof(sRecordType);
giovannivisentini 1:a0eeb478a45a 47
giovannivisentini 1:a0eeb478a45a 48 return new RecordAAR(std::string((const char*)buffer+offset,
giovannivisentini 1:a0eeb478a45a 49 header.getPlayloadLenght()));
giovannivisentini 1:a0eeb478a45a 50 }
giovannivisentini 0:04b82ae7aa43 51
giovannivisentini 0:04b82ae7aa43 52 } /* namespace NDefLib */