ST
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
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NDefLib
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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.
Diff: Message.cpp
- Revision:
- 0:04b82ae7aa43
- Child:
- 1:a0eeb478a45a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Message.cpp Thu Nov 19 08:49:47 2015 +0000
@@ -0,0 +1,81 @@
+/*
+ * Message.cpp
+ *
+ * Created on: Nov 6, 2015
+ * Author: giovanni visentini
+ */
+
+#include <cstdlib>
+#include "NDefLib/Message.h"
+#include "RecordType/EmptyRecord.h"
+#include "RecordType/RecordText.h"
+
+namespace NDefLib {
+
+uint16_t Message::getByteLenght()const{
+ uint16_t lenght=2; //length size
+
+ if(mRecords.size()==0)
+ return lenght+EmptyRecord().getByteLenght();
+
+ std::vector<Record*>::const_iterator it = mRecords.begin();
+ const std::vector<Record*>::const_iterator end = mRecords.end();
+
+ for(;it!=end;++it){
+ lenght+= (*it)->getByteLenght();
+ }//for
+
+ return lenght;
+}//getByteLenght
+
+uint16_t Message::write(uint8_t *buffer){
+
+ const uint16_t length =getByteLenght()-2;
+ uint16_t offset=0;
+ buffer[offset++]=(uint8_t)((length & 0xFF00)>>8);
+ buffer[offset++]=(uint8_t)((length & 0x00FF));
+
+ const uint32_t nRecord = mRecords.size();
+
+ if(mRecords.size()==0){
+ offset += EmptyRecord().write(buffer+offset);
+ return offset;
+ }//else
+
+ for(uint32_t i=0;i<nRecord; i++){
+ Record *r = mRecords[i];
+
+ r->setAsMiddleRecord();
+ if(i==0)
+ r->setAsFirstRecord();
+ if(i==nRecord-1)
+ r->setAsLastRecord();
+
+ offset+= r->write(buffer+offset);
+ }//for
+
+ return offset;
+}//write
+
+void Message::parseMessage(uint8_t *rawNdefFile,std::vector<Record*> *parsedRecords){
+
+ //const uint16_t length = (rawNdefFile[0]<<8 | rawNdefFile[1]);
+ //skip the message length info
+ uint16_t offset=2;
+ Record *r;
+ do{
+ r = RecordText::parse(rawNdefFile+offset);
+ if(r==NULL){
+
+
+
+ }//else
+
+ offset += r->getByteLenght();
+ parsedRecords->push_back(r);
+ }while(!r->isLastRecord());
+
+}
+
+
+} /* namespace NDefLib */