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@21:72c86cbd49be, 2017-08-21 (annotated)

Committer:
giovannivisentini
Date:
Mon Aug 21 12:02:31 2017 +0000
Revision:
21:72c86cbd49be
Parent:
20:31f727872290 
change on_message_write callback; the message parameter was unused and it pointed to an invalid object

Who changed what in which revision?

UserRevisionLine numberNew contents of line
giovannivisentini 8:473f6e0b03df 1 /**
giovannivisentini 8:473f6e0b03df 2 ******************************************************************************
giovannivisentini 15:01fc5a4b8366 3 * @file NDefNfcTag.h
giovannivisentini 8:473f6e0b03df 4 * @author ST / Central Labs
giovannivisentini 19:13d84b136a62 5 * @version V2.0.0
giovannivisentini 19:13d84b136a62 6 * @date 28 Apr 2017
giovannivisentini 16:030e7ffdf512 7 * @brief Generic interface that a device must implement to 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 16:030e7ffdf512 48 * This class is made to handle also asynchronous communication with the nfc component.
giovannivisentini 16:030e7ffdf512 49 * All the functions in this class will return immediately, when a command ends 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 16:030e7ffdf512 57 * Class that contains all the function called when a command finished.
giovannivisentini 14:ba0c186ae6d6 58 * The default implementation is an empty function.
giovannivisentini 14:ba0c186ae6d6 59 */
giovannivisentini 16:030e7ffdf512 60 class Callbacks {
giovannivisentini 14:ba0c186ae6d6 61 public:
giovannivisentini 14:ba0c186ae6d6 62
giovannivisentini 14:ba0c186ae6d6 63 /**
giovannivisentini 14:ba0c186ae6d6 64 * Called when a session is open.
giovannivisentini 16:030e7ffdf512 65 * @param tag Tag where the session is open.
giovannivisentini 16:030e7ffdf512 66 * @param success True if the operation has success.
giovannivisentini 14:ba0c186ae6d6 67 */
giovannivisentini 19:13d84b136a62 68 virtual void on_session_open(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 16:030e7ffdf512 73 * Called when a message is written.
giovannivisentini 16:030e7ffdf512 74 * @param tag Tag where the message is written.
giovannivisentini 16:030e7ffdf512 75 * @param success True if the operation has success.
giovannivisentini 14:ba0c186ae6d6 76 */
giovannivisentini 21:72c86cbd49be 77 virtual void on_message_write(NDefNfcTag *tag,bool success){
giovannivisentini 21:72c86cbd49be 78 (void)tag;(void)success;
giovannivisentini 14:ba0c186ae6d6 79
giovannivisentini 14:ba0c186ae6d6 80 };
giovannivisentini 14:ba0c186ae6d6 81
giovannivisentini 14:ba0c186ae6d6 82 /**
giovannivisentini 14:ba0c186ae6d6 83 * Called when a message is read.
giovannivisentini 16:030e7ffdf512 84 * @param tag Tag where the message is read.
giovannivisentini 16:030e7ffdf512 85 * @param success True if the operation has success.
giovannivisentini 14:ba0c186ae6d6 86 */
giovannivisentini 19:13d84b136a62 87 virtual void on_message_read(NDefNfcTag *tag,bool success,
giovannivisentini 14:ba0c186ae6d6 88 const Message *msg){
giovannivisentini 14:ba0c186ae6d6 89 (void)tag;(void)success; (void)msg;
giovannivisentini 14:ba0c186ae6d6 90 };
giovannivisentini 14:ba0c186ae6d6 91
giovannivisentini 14:ba0c186ae6d6 92
giovannivisentini 14:ba0c186ae6d6 93 /**
giovannivisentini 16:030e7ffdf512 94 * Called when a session is closed.
giovannivisentini 16:030e7ffdf512 95 * @param tag Tag where the session is closed.
giovannivisentini 16:030e7ffdf512 96 * @param success True if the operation has success.
giovannivisentini 14:ba0c186ae6d6 97 */
giovannivisentini 19:13d84b136a62 98 virtual void on_session_close(NDefNfcTag *tag,bool success){
giovannivisentini 14:ba0c186ae6d6 99 (void)tag;(void)success;
giovannivisentini 14:ba0c186ae6d6 100 };
giovannivisentini 14:ba0c186ae6d6 101
giovannivisentini 16:030e7ffdf512 102 virtual ~Callbacks(){};
giovannivisentini 14:ba0c186ae6d6 103 };
giovannivisentini 14:ba0c186ae6d6 104
giovannivisentini 14:ba0c186ae6d6 105 private:
giovannivisentini 14:ba0c186ae6d6 106
giovannivisentini 14:ba0c186ae6d6 107 /**
giovannivisentini 16:030e7ffdf512 108 * Data used to store the callback status during a read/write operation.
giovannivisentini 14:ba0c186ae6d6 109 */
giovannivisentini 14:ba0c186ae6d6 110 struct CallbackStatus{
giovannivisentini 16:030e7ffdf512 111
giovannivisentini 16:030e7ffdf512 112 /** Object that triggers the callback */
giovannivisentini 14:ba0c186ae6d6 113 NDefNfcTag *callOwner;
giovannivisentini 16:030e7ffdf512 114
giovannivisentini 16:030e7ffdf512 115 /** Message that the callback is writing/reading */
giovannivisentini 14:ba0c186ae6d6 116 Message *msg;
giovannivisentini 14:ba0c186ae6d6 117 };
giovannivisentini 14:ba0c186ae6d6 118
giovannivisentini 14:ba0c186ae6d6 119 public:
giovannivisentini 14:ba0c186ae6d6 120
giovannivisentini 14:ba0c186ae6d6 121 NDefNfcTag():mCallBack(&mDefaultCallBack){}
giovannivisentini 14:ba0c186ae6d6 122
giovannivisentini 14:ba0c186ae6d6 123 /**
giovannivisentini 16:030e7ffdf512 124 * Set the callback object.
giovannivisentini 16:030e7ffdf512 125 * @param c Object containing the callback.
giovannivisentini 14:ba0c186ae6d6 126 */
giovannivisentini 19:13d84b136a62 127 void set_callback(Callbacks *c){
Davidroid 20:31f727872290 128 if (c!=NULL) {
giovannivisentini 16:030e7ffdf512 129 mCallBack=c;
Davidroid 20:31f727872290 130 } else {
giovannivisentini 16:030e7ffdf512 131 mCallBack=&mDefaultCallBack;
Davidroid 20:31f727872290 132 }
giovannivisentini 14:ba0c186ae6d6 133 }//setCallBack
giovannivisentini 14:ba0c186ae6d6 134
giovannivisentini 8:473f6e0b03df 135
giovannivisentini 8:473f6e0b03df 136 /**
giovannivisentini 12:ed4d9b8d1410 137 * Open the communication session with the nfc tag.
giovannivisentini 12:ed4d9b8d1410 138 * @param force Force to open a communication.
giovannivisentini 8:473f6e0b03df 139 * @return true if success
giovannivisentini 8:473f6e0b03df 140 */
giovannivisentini 19:13d84b136a62 141 virtual bool open_session(bool force = false)=0;
giovannivisentini 8:473f6e0b03df 142
giovannivisentini 8:473f6e0b03df 143 /**
giovannivisentini 12:ed4d9b8d1410 144 * Close the communication with the nfc tag.
giovannivisentini 8:473f6e0b03df 145 * @return true if success
giovannivisentini 8:473f6e0b03df 146 */
giovannivisentini 19:13d84b136a62 147 virtual bool close_session()=0;
giovannivisentini 14:ba0c186ae6d6 148
giovannivisentini 14:ba0c186ae6d6 149 /**
giovannivisentini 14:ba0c186ae6d6 150 * Returns true if a communication with the nfc tag is open.
giovannivisentini 14:ba0c186ae6d6 151 * @return true if a communication with the nfc tag is open
giovannivisentini 14:ba0c186ae6d6 152 */
giovannivisentini 19:13d84b136a62 153 virtual bool is_session_open()=0;
giovannivisentini 8:473f6e0b03df 154
giovannivisentini 8:473f6e0b03df 155 /**
giovannivisentini 12:ed4d9b8d1410 156 * Write a message in the nfc tag.
giovannivisentini 12:ed4d9b8d1410 157 * @par This call will delete the previous message.
giovannivisentini 12:ed4d9b8d1410 158 * @param msg Message to write.
giovannivisentini 8:473f6e0b03df 159 * @return true if success
giovannivisentini 8:473f6e0b03df 160 */
giovannivisentini 14:ba0c186ae6d6 161 virtual bool write(Message &msg) {
Davidroid 20:31f727872290 162 if (!is_session_open()) {
giovannivisentini 21:72c86cbd49be 163 mCallBack->on_message_write(this,false);
giovannivisentini 8:473f6e0b03df 164 return false;
giovannivisentini 14:ba0c186ae6d6 165 }
giovannivisentini 8:473f6e0b03df 166
giovannivisentini 19:13d84b136a62 167 const uint16_t length = msg.get_byte_length();
giovannivisentini 8:473f6e0b03df 168 uint8_t *buffer = new uint8_t[length];
Davidroid 20:31f727872290 169 if (buffer==NULL){ //impossible to allocate the buffer
giovannivisentini 21:72c86cbd49be 170 mCallBack->on_message_write(this,false);
giovannivisentini 8:473f6e0b03df 171 return false;
giovannivisentini 14:ba0c186ae6d6 172 }
giovannivisentini 14:ba0c186ae6d6 173
giovannivisentini 8:473f6e0b03df 174 msg.write(buffer);
giovannivisentini 14:ba0c186ae6d6 175
giovannivisentini 14:ba0c186ae6d6 176 mCallBackStatus.callOwner=this;
giovannivisentini 21:72c86cbd49be 177 mCallBackStatus.msg=NULL;
giovannivisentini 14:ba0c186ae6d6 178
giovannivisentini 14:ba0c186ae6d6 179 return writeByte(buffer, length,0,NDefNfcTag::onWriteMessageCallback,&mCallBackStatus);
giovannivisentini 8:473f6e0b03df 180 }
giovannivisentini 8:473f6e0b03df 181
giovannivisentini 8:473f6e0b03df 182 /**
giovannivisentini 12:ed4d9b8d1410 183 * Read a message from the tag.
giovannivisentini 12:ed4d9b8d1410 184 * @param[in,out] msg Message object the read records are added to.
giovannivisentini 8:473f6e0b03df 185 * @return true if success
giovannivisentini 8:473f6e0b03df 186 */
giovannivisentini 14:ba0c186ae6d6 187 virtual bool read(Message *msg) {
Davidroid 20:31f727872290 188 if (!is_session_open()) {
giovannivisentini 19:13d84b136a62 189 mCallBack->on_message_read(this,false,msg);
giovannivisentini 8:473f6e0b03df 190 return false;
giovannivisentini 14:ba0c186ae6d6 191 }
giovannivisentini 8:473f6e0b03df 192
giovannivisentini 14:ba0c186ae6d6 193 uint8_t *buffer = new uint8_t[2];
Davidroid 20:31f727872290 194 if (buffer==NULL) {
giovannivisentini 19:13d84b136a62 195 mCallBack->on_message_read(this,false,msg);
giovannivisentini 14:ba0c186ae6d6 196 return false;
giovannivisentini 8:473f6e0b03df 197 }
giovannivisentini 14:ba0c186ae6d6 198
giovannivisentini 14:ba0c186ae6d6 199 mCallBackStatus.callOwner=this;
giovannivisentini 14:ba0c186ae6d6 200 mCallBackStatus.msg=msg;
giovannivisentini 14:ba0c186ae6d6 201 return readByte(0,2,buffer,NDefNfcTag::onReadMessageLength,&mCallBackStatus);
giovannivisentini 8:473f6e0b03df 202 }
giovannivisentini 8:473f6e0b03df 203
giovannivisentini 8:473f6e0b03df 204 virtual ~NDefNfcTag() {}
giovannivisentini 8:473f6e0b03df 205
giovannivisentini 14:ba0c186ae6d6 206 protected:
giovannivisentini 14:ba0c186ae6d6 207
giovannivisentini 14:ba0c186ae6d6 208 typedef struct CallbackStatus CallbackStatus_t;
giovannivisentini 14:ba0c186ae6d6 209
giovannivisentini 8:473f6e0b03df 210 /**
giovannivisentini 16:030e7ffdf512 211 * Function that the component will call when a read/write operation is completed
giovannivisentini 16:030e7ffdf512 212 * @param internalState Callback internal state data.
giovannivisentini 16:030e7ffdf512 213 * @param status True if the operation succeed.
giovannivisentini 16:030e7ffdf512 214 * @param buffer Buffer to read/write.
giovannivisentini 16:030e7ffdf512 215 * @param length Number of byte read/write.
giovannivisentini 14:ba0c186ae6d6 216 * @return true if the operation had success
giovannivisentini 8:473f6e0b03df 217 */
giovannivisentini 16:030e7ffdf512 218 typedef bool(*byteOperationCallback_t)(CallbackStatus_t *internalState,
Davidroid 20:31f727872290 219 bool status,const uint8_t *buffer, uint16_t length);
giovannivisentini 8:473f6e0b03df 220
giovannivisentini 8:473f6e0b03df 221 /**
giovannivisentini 12:ed4d9b8d1410 222 * Write a sequence of bytes to the NDEF file.
giovannivisentini 16:030e7ffdf512 223 * @param buffer Buffer to write.
giovannivisentini 16:030e7ffdf512 224 * @param length Number of bytes to write.
giovannivisentini 16:030e7ffdf512 225 * @param offset Offset where start to write.
giovannivisentini 16:030e7ffdf512 226 * @param callback Function to call when the operation ended.
giovannivisentini 16:030e7ffdf512 227 * @param callbackStatus Parameter to pass to the callback function.
giovannivisentini 14:ba0c186ae6d6 228 * @return true if the operation has success
giovannivisentini 8:473f6e0b03df 229 */
giovannivisentini 14:ba0c186ae6d6 230 virtual bool writeByte(const uint8_t *buffer, uint16_t length,uint16_t offset,
Davidroid 20:31f727872290 231 byteOperationCallback_t callback,CallbackStatus_t *callbackStatus)=0;
giovannivisentini 8:473f6e0b03df 232
giovannivisentini 8:473f6e0b03df 233 /**
giovannivisentini 12:ed4d9b8d1410 234 * Read a sequence of bytes from the NDEF file.
giovannivisentini 14:ba0c186ae6d6 235 * @param byteOffset Read offset in bytes.
giovannivisentini 12:ed4d9b8d1410 236 * @param byteLength Number of bytes to read.
giovannivisentini 12:ed4d9b8d1410 237 * @param[out] buffer Buffer to store the read data into.
giovannivisentini 16:030e7ffdf512 238 * @param callback Function to call when the operation ended.
giovannivisentini 16:030e7ffdf512 239 * @param callbackStatus Parameter to pass to the callback function.
giovannivisentini 16:030e7ffdf512 240 * @return true if the operation has success
giovannivisentini 8:473f6e0b03df 241 */
giovannivisentini 8:473f6e0b03df 242 virtual bool readByte(const uint16_t byteOffset, const uint16_t byteLength,
Davidroid 20:31f727872290 243 uint8_t *buffer, byteOperationCallback_t callback,CallbackStatus_t *callbackStatus)=0;
giovannivisentini 14:ba0c186ae6d6 244
giovannivisentini 8:473f6e0b03df 245
giovannivisentini 14:ba0c186ae6d6 246 /** object with the user callback */
giovannivisentini 16:030e7ffdf512 247 Callbacks *mCallBack;
giovannivisentini 8:473f6e0b03df 248 private:
giovannivisentini 12:ed4d9b8d1410 249
giovannivisentini 14:ba0c186ae6d6 250 /** object with the current callback status */
giovannivisentini 14:ba0c186ae6d6 251 CallbackStatus_t mCallBackStatus;
giovannivisentini 16:030e7ffdf512 252 /** default callback object, all the functions are empty */
giovannivisentini 16:030e7ffdf512 253 Callbacks mDefaultCallBack;
giovannivisentini 14:ba0c186ae6d6 254
giovannivisentini 8:473f6e0b03df 255 /**
giovannivisentini 19:13d84b136a62 256 * Function called when a write operation completes, it will invoke on_message_write
giovannivisentini 16:030e7ffdf512 257 * @param internalState Object that invokes the write operation.
giovannivisentini 15:01fc5a4b8366 258 * @param status True if the operation had success.
giovannivisentini 16:030e7ffdf512 259 * @param buffer Buffer written.
giovannivisentini 16:030e7ffdf512 260 * @param length Number of bytes written.
giovannivisentini 14:ba0c186ae6d6 261 * @return true if the write had success
giovannivisentini 8:473f6e0b03df 262 */
giovannivisentini 14:ba0c186ae6d6 263 static bool onWriteMessageCallback(CallbackStatus_t *internalState,
Davidroid 20:31f727872290 264 bool status,const uint8_t *buffer, uint16_t ){
giovannivisentini 14:ba0c186ae6d6 265 delete [] buffer;
giovannivisentini 14:ba0c186ae6d6 266
giovannivisentini 21:72c86cbd49be 267 internalState->callOwner->mCallBack->on_message_write(internalState->callOwner,status);
Davidroid 20:31f727872290 268
giovannivisentini 14:ba0c186ae6d6 269 return status;
giovannivisentini 14:ba0c186ae6d6 270 }
giovannivisentini 8:473f6e0b03df 271
giovannivisentini 8:473f6e0b03df 272 /**
giovannivisentini 16:030e7ffdf512 273 * Function called when a read operation completes.
giovannivisentini 16:030e7ffdf512 274 * In this case we read the message length, this function will read all the message
giovannivisentini 16:030e7ffdf512 275 * @param internalState Object that invokes the write operation.
giovannivisentini 15:01fc5a4b8366 276 * @param status true If the operation had success.
giovannivisentini 15:01fc5a4b8366 277 * @param buffer Buffer read.
giovannivisentini 16:030e7ffdf512 278 * @param length Number of bytes read.
giovannivisentini 14:ba0c186ae6d6 279 * @return true if the read had success
giovannivisentini 8:473f6e0b03df 280 */
giovannivisentini 14:ba0c186ae6d6 281 static bool onReadMessageLength(CallbackStatus_t *internalState,
Davidroid 20:31f727872290 282 bool status,const uint8_t *buffer, uint16_t length){
giovannivisentini 14:ba0c186ae6d6 283
Davidroid 20:31f727872290 284 if (!status || length!=2) {
Davidroid 20:31f727872290 285 internalState->callOwner->mCallBack->on_message_read(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 286 return false;
giovannivisentini 14:ba0c186ae6d6 287 }//if
giovannivisentini 14:ba0c186ae6d6 288
giovannivisentini 14:ba0c186ae6d6 289 length = (((uint16_t) buffer[0]) << 8 | buffer[1]);
giovannivisentini 14:ba0c186ae6d6 290 delete [] buffer;
giovannivisentini 14:ba0c186ae6d6 291
giovannivisentini 14:ba0c186ae6d6 292 uint8_t *readBuffer = new uint8_t[length];
Davidroid 20:31f727872290 293 if (readBuffer==NULL) {
Davidroid 20:31f727872290 294 internalState->callOwner->mCallBack->on_message_read(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 295 return false;
giovannivisentini 14:ba0c186ae6d6 296 }//readBuffer
giovannivisentini 14:ba0c186ae6d6 297
Davidroid 20:31f727872290 298 internalState->callOwner->readByte(2,length,readBuffer, &NDefNfcTag::onReadMessageCallback,internalState);
giovannivisentini 14:ba0c186ae6d6 299 return status;
giovannivisentini 14:ba0c186ae6d6 300 }
giovannivisentini 14:ba0c186ae6d6 301
giovannivisentini 14:ba0c186ae6d6 302 /**
giovannivisentini 16:030e7ffdf512 303 * Function called when all messages have been read
giovannivisentini 16:030e7ffdf512 304 * @param internalState Object that invokes the write operation.
giovannivisentini 15:01fc5a4b8366 305 * @param status True if the operation had success.
giovannivisentini 15:01fc5a4b8366 306 * @param buffer Buffer read.
giovannivisentini 16:030e7ffdf512 307 * @param length Number of bytes read.
giovannivisentini 14:ba0c186ae6d6 308 * @return true if the read had success
giovannivisentini 14:ba0c186ae6d6 309 */
giovannivisentini 14:ba0c186ae6d6 310 static bool onReadMessageCallback(CallbackStatus_t *internalState,
Davidroid 20:31f727872290 311 bool status,const uint8_t *buffer, uint16_t length){
Davidroid 20:31f727872290 312 if(!status) {
Davidroid 20:31f727872290 313 internalState->callOwner->mCallBack->on_message_read(internalState->callOwner,false,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 314 return false;
giovannivisentini 14:ba0c186ae6d6 315 }
giovannivisentini 19:13d84b136a62 316 Message::parse_message(buffer, length, internalState->msg);
giovannivisentini 14:ba0c186ae6d6 317 delete [] buffer;
Davidroid 20:31f727872290 318 internalState->callOwner->mCallBack-> on_message_read(internalState->callOwner,true,internalState->msg);
giovannivisentini 14:ba0c186ae6d6 319 return status ;
giovannivisentini 14:ba0c186ae6d6 320 }
giovannivisentini 8:473f6e0b03df 321
giovannivisentini 14:ba0c186ae6d6 322 }; //class NDefNfcTagASync
giovannivisentini 8:473f6e0b03df 323
giovannivisentini 14:ba0c186ae6d6 324 }// namespace NDefLib
giovannivisentini 14:ba0c186ae6d6 325
giovannivisentini 14:ba0c186ae6d6 326 #endif /* NDEFLIB_NDEFNFCTAG_H_ */
Davidroid 20:31f727872290 327
Davidroid 20:31f727872290 328
Davidroid 20:31f727872290 329 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/