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.

NDefNfcTag.h@14:ba0c186ae6d6, 2016-01-28 (annotated)

Committer:
giovannivisentini
Date:
Thu Jan 28 14:01:07 2016 +0000
Revision:
14:ba0c186ae6d6
Parent:
12:ed4d9b8d1410
Child:
15:01fc5a4b8366
add async api

Who changed what in which revision?

UserRevisionLine numberNew contents of line
giovannivisentini 8:473f6e0b03df 1 /**
giovannivisentini 8:473f6e0b03df 2 ******************************************************************************
giovannivisentini 8:473f6e0b03df 3 * @file Type4NfcTag.h
giovannivisentini 8:473f6e0b03df 4 * @author ST / Central Labs
giovannivisentini 8:473f6e0b03df 5 * @version V1.0.0
giovannivisentini 14:ba0c186ae6d6 6 * @date 21 Jan 2016
giovannivisentini 8:473f6e0b03df 7 * @brief Generic interface that a device must implement for use the NDefLib
giovannivisentini 14:ba0c186ae6d6 8 * with async communication
giovannivisentini 8:473f6e0b03df 9 ******************************************************************************
giovannivisentini 8:473f6e0b03df 10 * @attention
giovannivisentini 8:473f6e0b03df 11 *
giovannivisentini 8:473f6e0b03df 12 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
giovannivisentini 8:473f6e0b03df 13 *
giovannivisentini 8:473f6e0b03df 14 * Redistribution and use in source and binary forms, with or without modification,
giovannivisentini 8:473f6e0b03df 15 * are permitted provided that the following conditions are met:
giovannivisentini 8:473f6e0b03df 16 * 1. Redistributions of source code must retain the above copyright notice,
giovannivisentini 8:473f6e0b03df 17 * this list of conditions and the following disclaimer.
giovannivisentini 8:473f6e0b03df 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
giovannivisentini 8:473f6e0b03df 19 * this list of conditions and the following disclaimer in the documentation
giovannivisentini 8:473f6e0b03df 20 * and/or other materials provided with the distribution.
giovannivisentini 8:473f6e0b03df 21 * 3. Neither the name of STMicroelectronics nor the names of its contributors
giovannivisentini 8:473f6e0b03df 22 * may be used to endorse or promote products derived from this software
giovannivisentini 8:473f6e0b03df 23 * without specific prior written permission.
giovannivisentini 8:473f6e0b03df 24 *
giovannivisentini 8:473f6e0b03df 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
giovannivisentini 8:473f6e0b03df 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
giovannivisentini 8:473f6e0b03df 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
giovannivisentini 8:473f6e0b03df 28 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
giovannivisentini 8:473f6e0b03df 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
giovannivisentini 8:473f6e0b03df 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
giovannivisentini 8:473f6e0b03df 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
giovannivisentini 8:473f6e0b03df 32 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
giovannivisentini 8:473f6e0b03df 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
giovannivisentini 8:473f6e0b03df 34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
giovannivisentini 8:473f6e0b03df 35 *
giovannivisentini 8:473f6e0b03df 36 ******************************************************************************
giovannivisentini 8:473f6e0b03df 37 */
giovannivisentini 14:ba0c186ae6d6 38
giovannivisentini 14:ba0c186ae6d6 39 #ifndef NDEFLIB_NDEFNFCTAG_H_
giovannivisentini 14:ba0c186ae6d6 40 #define NDEFLIB_NDEFNFCTAG_H_
giovannivisentini 8:473f6e0b03df 41
giovannivisentini 8:473f6e0b03df 42 #include "NDefLib/Message.h"
giovannivisentini 8:473f6e0b03df 43
giovannivisentini 8:473f6e0b03df 44 namespace NDefLib {
giovannivisentini 8:473f6e0b03df 45
giovannivisentini 8:473f6e0b03df 46 /**
giovannivisentini 14:ba0c186ae6d6 47 * Abstract class used to write/read NDef messages to/from a nfc tag.
giovannivisentini 14:ba0c186ae6d6 48 * This class is made for handle also asynchronous communication with the nfc component.
giovannivisentini 14:ba0c186ae6d6 49 * All the function in this class will return immediately, when the operation end a proper callback function will
giovannivisentini 14:ba0c186ae6d6 50 * be called.
giovannivisentini 8:473f6e0b03df 51 */
giovannivisentini 8:473f6e0b03df 52 class NDefNfcTag {
giovannivisentini 14:ba0c186ae6d6 53
giovannivisentini 8:473f6e0b03df 54 public:
giovannivisentini 8:473f6e0b03df 55
giovannivisentini 14:ba0c186ae6d6 56 /**
giovannivisentini 14:ba0c186ae6d6 57 * Class that contains all the function called when a command finish.
giovannivisentini 14:ba0c186ae6d6 58 * The default implementation is an empty function.
giovannivisentini 14:ba0c186ae6d6 59 */
giovannivisentini 14:ba0c186ae6d6 60 class Callback {
giovannivisentini 14:ba0c186ae6d6 61 public:
giovannivisentini 14:ba0c186ae6d6 62
giovannivisentini 14:ba0c186ae6d6 63 /**
giovannivisentini 14:ba0c186ae6d6 64 * Called when a session is open.
giovannivisentini 14:ba0c186ae6d6 65 * @param tag tag where the session is open.
giovannivisentini 14:ba0c186ae6d6 66 * @param success true if the operation has success.
giovannivisentini 14:ba0c186ae6d6 67 */
giovannivisentini 14:ba0c186ae6d6 68 virtual void onSessionOpen(NDefNfcTag *tag,bool success){
giovannivisentini 14:ba0c186ae6d6 69 (void)tag;(void)success;
giovannivisentini 14:ba0c186ae6d6 70 };
giovannivisentini 14:ba0c186ae6d6 71
giovannivisentini 14:ba0c186ae6d6 72 /**
giovannivisentini 14:ba0c186ae6d6 73 * Called when a message is write.
giovannivisentini 14:ba0c186ae6d6 74 * @param tag tag where the message is wrote.
giovannivisentini 14:ba0c186ae6d6 75 * @param success true if the operation has success.
giovannivisentini 14:ba0c186ae6d6 76 */
giovannivisentini 14:ba0c186ae6d6 77 virtual void onMessageWrite(NDefNfcTag *tag,bool success,
giovannivisentini 14:ba0c186ae6d6 78 const Message &msg){
giovannivisentini 14:ba0c186ae6d6 79 (void)tag;(void)success; (void)msg;
giovannivisentini 14:ba0c186ae6d6 80
giovannivisentini 14:ba0c186ae6d6 81 };
giovannivisentini 14:ba0c186ae6d6 82
giovannivisentini 14:ba0c186ae6d6 83 /**
giovannivisentini 14:ba0c186ae6d6 84 * Called when a message is read.
giovannivisentini 14:ba0c186ae6d6 85 * @param tag tag where the message is read.
giovannivisentini 14:ba0c186ae6d6 86 * @param success true if the operation has success.
giovannivisentini 14:ba0c186ae6d6 87 */
giovannivisentini 14:ba0c186ae6d6 88 virtual void onMessageRead(NDefNfcTag *tag,bool success,
giovannivisentini 14:ba0c186ae6d6 89 const Message *msg){
giovannivisentini 14:ba0c186ae6d6 90 (void)tag;(void)success; (void)msg;
giovannivisentini 14:ba0c186ae6d6 91 };
giovannivisentini 14:ba0c186ae6d6 92
giovannivisentini 14:ba0c186ae6d6 93
giovannivisentini 14:ba0c186ae6d6 94 /**
giovannivisentini 14:ba0c186ae6d6 95 * Called when a session is close.
giovannivisentini 14:ba0c186ae6d6 96 * @param tag tag where the session is close.
giovannivisentini 14:ba0c186ae6d6 97 * @param success true if the operation has success.
giovannivisentini 14:ba0c186ae6d6 98 */
giovannivisentini 14:ba0c186ae6d6 99 virtual void onSessionClose(NDefNfcTag *tag,bool success){
giovannivisentini 14:ba0c186ae6d6 100 (void)tag;(void)success;
giovannivisentini 14:ba0c186ae6d6 101 };
giovannivisentini 14:ba0c186ae6d6 102
giovannivisentini 14:ba0c186ae6d6 103 virtual ~Callback(){};
giovannivisentini 14:ba0c186ae6d6 104 };
giovannivisentini 14:ba0c186ae6d6 105
giovannivisentini 14:ba0c186ae6d6 106 private:
giovannivisentini 14:ba0c186ae6d6 107
giovannivisentini 14:ba0c186ae6d6 108 /**
giovannivisentini 14:ba0c186ae6d6 109 * Data used for store the callback status.
giovannivisentini 14:ba0c186ae6d6 110 */
giovannivisentini 14:ba0c186ae6d6 111 struct CallbackStatus{
giovannivisentini 14:ba0c186ae6d6 112 /**object that start the callback */
giovannivisentini 14:ba0c186ae6d6 113 NDefNfcTag *callOwner;
giovannivisentini 14:ba0c186ae6d6 114 /** message that the callback is manage */
giovannivisentini 14:ba0c186ae6d6 115 Message *msg;
giovannivisentini 14:ba0c186ae6d6 116 };
giovannivisentini 14:ba0c186ae6d6 117
giovannivisentini 14:ba0c186ae6d6 118 public:
giovannivisentini 14:ba0c186ae6d6 119
giovannivisentini 14:ba0c186ae6d6 120 NDefNfcTag():mCallBack(&mDefaultCallBack){}
giovannivisentini 14:ba0c186ae6d6 121
giovannivisentini 14:ba0c186ae6d6 122 /**
giovannivisentini 14:ba0c186ae6d6 123 * Set the callback.
giovannivisentini 14:ba0c186ae6d6 124 * @param c object contains the callback.
giovannivisentini 14:ba0c186ae6d6 125 */
giovannivisentini 14:ba0c186ae6d6 126 void setCallBack(Callback *c){
giovannivisentini 14:ba0c186ae6d6 127 mCallBack=c;
giovannivisentini 14:ba0c186ae6d6 128 }//setCallBack
giovannivisentini 14:ba0c186ae6d6 129
giovannivisentini 8:473f6e0b03df 130
giovannivisentini 8:473f6e0b03df 131 /**
giovannivisentini 12:ed4d9b8d1410 132 * Open the communication session with the nfc tag.
giovannivisentini 12:ed4d9b8d1410 133 * @param force Force to open a communication.
giovannivisentini 8:473f6e0b03df 134 * @return true if success
giovannivisentini 8:473f6e0b03df 135 */
giovannivisentini 14:ba0c186ae6d6 136 virtual bool openSession(bool force = false)=0;
giovannivisentini 8:473f6e0b03df 137
giovannivisentini 8:473f6e0b03df 138 /**
giovannivisentini 12:ed4d9b8d1410 139 * Close the communication with the nfc tag.
giovannivisentini 8:473f6e0b03df 140 * @return true if success
giovannivisentini 8:473f6e0b03df 141 */
giovannivisentini 14:ba0c186ae6d6 142 virtual bool closeSession()=0;
giovannivisentini 14:ba0c186ae6d6 143
giovannivisentini 14:ba0c186ae6d6 144 /**
giovannivisentini 14:ba0c186ae6d6 145 * Returns true if a communication with the nfc tag is open.
giovannivisentini 14:ba0c186ae6d6 146 * @return true if a communication with the nfc tag is open
giovannivisentini 14:ba0c186ae6d6 147 */
giovannivisentini 14:ba0c186ae6d6 148 virtual bool isSessionOpen()=0;
giovannivisentini 8:473f6e0b03df 149
giovannivisentini 8:473f6e0b03df 150 /**
giovannivisentini 12:ed4d9b8d1410 151 * Write a message in the nfc tag.
giovannivisentini 12:ed4d9b8d1410 152 * @par This call will delete the previous message.
giovannivisentini 12:ed4d9b8d1410 153 * @param msg Message to write.
giovannivisentini 8:473f6e0b03df 154 * @return true if success
giovannivisentini 8:473f6e0b03df 155 */
giovannivisentini 14:ba0c186ae6d6 156 virtual bool write(Message &msg) {
giovannivisentini 14:ba0c186ae6d6 157 if(!isSessionOpen()){
giovannivisentini 14:ba0c186ae6d6 158 mCallBack->onMessageWrite(this,false,msg);
giovannivisentini 8:473f6e0b03df 159 return false;
giovannivisentini 14:ba0c186ae6d6 160 }
giovannivisentini 8:473f6e0b03df 161
giovannivisentini 8:473f6e0b03df 162 const uint16_t length = msg.getByteLength();
giovannivisentini 8:473f6e0b03df 163 uint8_t *buffer = new uint8_t[length];
giovannivisentini 14:ba0c186ae6d6 164 if(buffer==NULL){ //impossible to allocate the buffer
giovannivisentini 14:ba0c186ae6d6 165 mCallBack->onMessageWrite(this,false,msg);
giovannivisentini 8:473f6e0b03df 166 return false;
giovannivisentini 14:ba0c186ae6d6 167 }
giovannivisentini 14:ba0c186ae6d6 168
giovannivisentini 8:473f6e0b03df 169 msg.write(buffer);
giovannivisentini 14:ba0c186ae6d6 170
giovannivisentini 14:ba0c186ae6d6 171 mCallBackStatus.callOwner=this;
giovannivisentini 14:ba0c186ae6d6 172 mCallBackStatus.msg=&msg;
giovannivisentini 14:ba0c186ae6d6 173
giovannivisentini 14:ba0c186ae6d6 174 return writeByte(buffer, length,0,NDefNfcTag::onWriteMessageCallback,&mCallBackStatus);
giovannivisentini 8:473f6e0b03df 175 }
giovannivisentini 8:473f6e0b03df 176
giovannivisentini 8:473f6e0b03df 177 /**
giovannivisentini 12:ed4d9b8d1410 178 * Read a message from the tag.
giovannivisentini 12:ed4d9b8d1410 179 * @param[in,out] msg Message object the read records are added to.
giovannivisentini 8:473f6e0b03df 180 * @return true if success
giovannivisentini 8:473f6e0b03df 181 */
giovannivisentini 14:ba0c186ae6d6 182 virtual bool read(Message *msg) {
giovannivisentini 14:ba0c186ae6d6 183 if(!isSessionOpen()){
giovannivisentini 14:ba0c186ae6d6 184 mCallBack->onMessageRead(this,false,msg);
giovannivisentini 8:473f6e0b03df 185 return false;
giovannivisentini 14:ba0c186ae6d6 186 }
giovannivisentini 8:473f6e0b03df 187
giovannivisentini 14:ba0c186ae6d6 188 uint8_t *buffer = new uint8_t[2];
giovannivisentini 14:ba0c186ae6d6 189 if(buffer==NULL){
giovannivisentini 14:ba0c186ae6d6 190 mCallBack->onMessageRead(this,false,msg);
giovannivisentini 14:ba0c186ae6d6 191 return false;
giovannivisentini 8:473f6e0b03df 192 }
giovannivisentini 14:ba0c186ae6d6 193
giovannivisentini 14:ba0c186ae6d6 194 mCallBackStatus.callOwner=this;
giovannivisentini 14:ba0c186ae6d6 195 mCallBackStatus.msg=msg;
giovannivisentini 14:ba0c186ae6d6 196 return readByte(0,2,buffer,NDefNfcTag::onReadMessageLength,&mCallBackStatus);
giovannivisentini 8:473f6e0b03df 197 }
giovannivisentini 8:473f6e0b03df 198
giovannivisentini 8:473f6e0b03df 199 virtual ~NDefNfcTag() {}
giovannivisentini 8:473f6e0b03df 200
giovannivisentini 14:ba0c186ae6d6 201 protected:
giovannivisentini 14:ba0c186ae6d6 202
giovannivisentini 14:ba0c186ae6d6 203 typedef struct CallbackStatus CallbackStatus_t;
giovannivisentini 14:ba0c186ae6d6 204
giovannivisentini 8:473f6e0b03df 205 /**
giovannivisentini 14:ba0c186ae6d6 206 * Function that the component has to call when it finish a read/write operation
giovannivisentini 14:ba0c186ae6d6 207 * @param interalState callback internal state data
giovannivisentini 14:ba0c186ae6d6 208 * @param status true if the operation success
giovannivisentini 14:ba0c186ae6d6 209 * @param buffer buffer write/read
giovannivisentini 14:ba0c186ae6d6 210 * @param length number of byte read/write
giovannivisentini 14:ba0c186ae6d6 211 * @return true if the operation had success
giovannivisentini 8:473f6e0b03df 212 */
giovannivisentini 14:ba0c186ae6d6 213 typedef bool(*byteOperationCallback_t)(CallbackStatus_t *interalState,
giovannivisentini 14:ba0c186ae6d6 214 bool status,const uint8_t *buffer, uint16_t length);
giovannivisentini 8:473f6e0b03df 215
giovannivisentini 8:473f6e0b03df 216 /**
giovannivisentini 12:ed4d9b8d1410 217 * Write a sequence of bytes to the NDEF file.
giovannivisentini 14:ba0c186ae6d6 218 * @param buffer buffer to write
giovannivisentini 14:ba0c186ae6d6 219 * @param length number of bytes to write
giovannivisentini 14:ba0c186ae6d6 220 * @param offset offset where start to write
giovannivisentini 14:ba0c186ae6d6 221 * @param callback function to call when the operation ended
giovannivisentini 14:ba0c186ae6d6 222 * @param callbackStatus parameter to pass to the callback function
giovannivisentini 14:ba0c186ae6d6 223 * @return true if the operation has success
giovannivisentini 8:473f6e0b03df 224 */
giovannivisentini 14:ba0c186ae6d6 225 virtual bool writeByte(const uint8_t *buffer, uint16_t length,uint16_t offset,
giovannivisentini 14:ba0c186ae6d6 226 byteOperationCallback_t callback,CallbackStatus_t *callbackStatus)=0;
giovannivisentini 8:473f6e0b03df 227
giovannivisentini 8:473f6e0b03df 228 /**
giovannivisentini 12:ed4d9b8d1410 229 * Read a sequence of bytes from the NDEF file.
giovannivisentini 14:ba0c186ae6d6 230 * @param byteOffset Read offset in bytes.
giovannivisentini 12:ed4d9b8d1410 231 * @param byteLength Number of bytes to read.
giovannivisentini 12:ed4d9b8d1410 232 * @param[out] buffer Buffer to store the read data into.
giovannivisentini 14:ba0c186ae6d6 233 * @param callback function to call when the operation ended
giovannivisentini 14:ba0c186ae6d6 234 * @param callbackStatus parameter to pass to the callback function
giovannivisentini 8:473f6e0b03df 235 * @return true if success
giovannivisentini 8:473f6e0b03df 236 */
giovannivisentini 8:473f6e0b03df 237 virtual bool readByte(const uint16_t byteOffset, const uint16_t byteLength,
giovannivisentini 14:ba0c186ae6d6 238 uint8_t *buffer, byteOperationCallback_t callback,CallbackStatus_t *callbackStatus)=0;
giovannivisentini 14:ba0c186ae6d6 239
giovannivisentini 8:473f6e0b03df 240
giovannivisentini 14:ba0c186ae6d6 241 /** object with the user callback */
giovannivisentini 14:ba0c186ae6d6 242 Callback *mCallBack;
giovannivisentini 8:473f6e0b03df 243 private:
giovannivisentini 12:ed4d9b8d1410 244
giovannivisentini 14:ba0c186ae6d6 245 /** object with the current callback status */
giovannivisentini 14:ba0c186ae6d6 246 CallbackStatus_t mCallBackStatus;
giovannivisentini 14:ba0c186ae6d6 247 /** default callback object, all the function are empty */
giovannivisentini 14:ba0c186ae6d6 248 Callback mDefaultCallBack;
giovannivisentini 14:ba0c186ae6d6 249
giovannivisentini 8:473f6e0b03df 250 /**
giovannivisentini 14:ba0c186ae6d6 251 * function that the user will call when a write end, it will invoke onMessageWrite
giovannivisentini 14:ba0c186ae6d6 252 * @param internalState object that invoke the write operation
giovannivisentini 14:ba0c186ae6d6 253 * @param status true if the operation had success
giovannivisentini 14:ba0c186ae6d6 254 * @param buffer buffer wrote
giovannivisentini 14:ba0c186ae6d6 255 * @param length number of byte wrote
giovannivisentini 14:ba0c186ae6d6 256 * @return true if the write had success
giovannivisentini 8:473f6e0b03df 257 */
giovannivisentini 14:ba0c186ae6d6 258 static bool onWriteMessageCallback(CallbackStatus_t *internalState,
giovannivisentini 14:ba0c186ae6d6 259 bool status,const uint8_t *buffer, uint16_t ){
giovannivisentini 14:ba0c186ae6d6 260 delete [] buffer;
giovannivisentini 14:ba0c186ae6d6 261
giovannivisentini 14:ba0c186ae6d6 262 internalState->callOwner->mCallBack->
giovannivisentini 14:ba0c186ae6d6 263 onMessageWrite(internalState->callOwner,status,*internalState->msg);
giovannivisentini 14:ba0c186ae6d6 264 return status;
giovannivisentini 14:ba0c186ae6d6 265 }
giovannivisentini 8:473f6e0b03df 266
giovannivisentini 8:473f6e0b03df 267 /**
giovannivisentini 14:ba0c186ae6d6 268 * function that the use will call after a read operation.
giovannivisentini 14:ba0c186ae6d6 269 * in this case we read the message length, this function will read all the message
giovannivisentini 14:ba0c186ae6d6 270 * @param internalState object that invoke the write operation
giovannivisentini 14:ba0c186ae6d6 271 * @param status true if the operation had success
giovannivisentini 14:ba0c186ae6d6 272 * @param buffer buffer read
giovannivisentini 14:ba0c186ae6d6 273 * @param length number of byte read
giovannivisentini 14:ba0c186ae6d6 274 * @return true if the read had success
giovannivisentini 8:473f6e0b03df 275 */
giovannivisentini 14:ba0c186ae6d6 276 static bool onReadMessageLength(CallbackStatus_t *internalState,
giovannivisentini 14:ba0c186ae6d6 277 bool status,const uint8_t *buffer, uint16_t length){
giovannivisentini 14:ba0c186ae6d6 278
giovannivisentini 14:ba0c186ae6d6 279 if(!status || length!=2){
giovannivisentini 14:ba0c186ae6d6 280 internalState->callOwner->mCallBack->
giovannivisentini 14:ba0c186ae6d6 281 onMessageRead(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 282 return false;
giovannivisentini 14:ba0c186ae6d6 283 }//if
giovannivisentini 14:ba0c186ae6d6 284
giovannivisentini 14:ba0c186ae6d6 285 length = (((uint16_t) buffer[0]) << 8 | buffer[1]);
giovannivisentini 14:ba0c186ae6d6 286 delete [] buffer;
giovannivisentini 14:ba0c186ae6d6 287
giovannivisentini 14:ba0c186ae6d6 288 uint8_t *readBuffer = new uint8_t[length];
giovannivisentini 14:ba0c186ae6d6 289 if(readBuffer==NULL){
giovannivisentini 14:ba0c186ae6d6 290 internalState->callOwner->mCallBack->
giovannivisentini 14:ba0c186ae6d6 291 onMessageRead(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 292 return false;
giovannivisentini 14:ba0c186ae6d6 293 }//readBuffer
giovannivisentini 14:ba0c186ae6d6 294
giovannivisentini 14:ba0c186ae6d6 295 internalState->callOwner->readByte(2,length,readBuffer,
giovannivisentini 14:ba0c186ae6d6 296 &NDefNfcTag::onReadMessageCallback,internalState);
giovannivisentini 14:ba0c186ae6d6 297 return status;
giovannivisentini 14:ba0c186ae6d6 298 }
giovannivisentini 14:ba0c186ae6d6 299
giovannivisentini 8:473f6e0b03df 300
giovannivisentini 14:ba0c186ae6d6 301 /**
giovannivisentini 14:ba0c186ae6d6 302 * function that the user will call when it read all the message
giovannivisentini 14:ba0c186ae6d6 303 * @param internalState object that invoke the write operation
giovannivisentini 14:ba0c186ae6d6 304 * @param status true if the operation had success
giovannivisentini 14:ba0c186ae6d6 305 * @param buffer buffer read
giovannivisentini 14:ba0c186ae6d6 306 * @param length number of byte read
giovannivisentini 14:ba0c186ae6d6 307 * @return true if the read had success
giovannivisentini 14:ba0c186ae6d6 308 */
giovannivisentini 14:ba0c186ae6d6 309 static bool onReadMessageCallback(CallbackStatus_t *internalState,
giovannivisentini 14:ba0c186ae6d6 310 bool status,const uint8_t *buffer, uint16_t length){
giovannivisentini 14:ba0c186ae6d6 311 if(!status){
giovannivisentini 14:ba0c186ae6d6 312 internalState->callOwner->mCallBack->
giovannivisentini 14:ba0c186ae6d6 313 onMessageRead(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 314 return false;
giovannivisentini 14:ba0c186ae6d6 315 }
giovannivisentini 14:ba0c186ae6d6 316 Message::parseMessage(buffer, length, internalState->msg);
giovannivisentini 14:ba0c186ae6d6 317 delete [] buffer;
giovannivisentini 14:ba0c186ae6d6 318 internalState->callOwner->mCallBack->
giovannivisentini 14:ba0c186ae6d6 319 onMessageRead(internalState->callOwner,true,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 320 return status ;
giovannivisentini 14:ba0c186ae6d6 321 }
giovannivisentini 8:473f6e0b03df 322
giovannivisentini 14:ba0c186ae6d6 323 }; //class NDefNfcTagASync
giovannivisentini 8:473f6e0b03df 324
giovannivisentini 14:ba0c186ae6d6 325 }// namespace NDefLib
giovannivisentini 14:ba0c186ae6d6 326
giovannivisentini 14:ba0c186ae6d6 327 #endif /* NDEFLIB_NDEFNFCTAG_H_ */