SampleAsync_countClick.cpp

00001 /**
00002   ******************************************************************************
00003   * @file       SampleAsync_countClick.cpp
00004   * @author     ST / Central Labs
00005   * @date       03 Dic 2015
00006   * @brief      This demo define a custom record that contains the number of time the user
00007   *             press the user button
00008   ******************************************************************************
00009   *
00010   * COPYRIGHT(c) 2015 STMicroelectronics
00011   *
00012   * Redistribution and use in source and binary forms, with or without modification,
00013   * are permitted provided that the following conditions are met:
00014   *   1. Redistributions of source code must retain the above copyright notice,
00015   *      this list of conditions and the following disclaimer.
00016   *   2. Redistributions in binary form must reproduce the above copyright notice,
00017   *      this list of conditions and the following disclaimer in the documentation
00018   *      and/or other materials provided with the distribution.
00019   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00020   *      may be used to endorse or promote products derived from this software
00021   *      without specific prior written permission.
00022   *
00023   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00024   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00025   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00026   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00027   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00028   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00029   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00030   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00031   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00032   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033   *
00034   ******************************************************************************
00035   */
00036   
00037 #include "mbed.h"
00038 
00039 #include "XNucleoNFC01A1.h"
00040 #include "NDefLib/NDefNfcTag.h"
00041 
00042 #include "MyRecord.h"
00043 
00044 /**
00045  * class with the callback needed to update the record in the tag
00046  */
00047 class WriteMyRecordCallback : public NDefLib::NDefNfcTag::Callbacks {
00048 
00049     /**
00050      * board where change the led status
00051      */
00052     XNucleoNFC01A1 *mNfcNucleo;
00053 
00054     /**
00055      * message to write
00056      */
00057     NDefLib::Message &mMsg;
00058 
00059     /**
00060      * true if the message is wrote in the tag
00061      */
00062     bool mCommandFinish;
00063 
00064     /**
00065      * true if an update request is done while writing a tag
00066      */
00067     bool mRequestRefresh;
00068 
00069 
00070     public:
00071 
00072         /**
00073          * build an object write an message into a nfc tag
00074          * @param nfcNucleo board with the leds and nfc tag
00075          * @param msg message to write
00076          */
00077         WriteMyRecordCallback(XNucleoNFC01A1 *nfcNucleo,NDefLib::Message &msg):
00078             mNfcNucleo(nfcNucleo),mMsg(msg),mCommandFinish(true),
00079             mRequestRefresh(false){}
00080 
00081         /**
00082          * start the write process
00083          */
00084         void update_message(){
00085             if(mCommandFinish){
00086                 mNfcNucleo->get_M24SR().get_NDef_tag().open_session();
00087             }else{// if it is doing something remember this request
00088                 mRequestRefresh=true;
00089             }
00090         }//updateMessage
00091 
00092     private:
00093 
00094         void on_error(){
00095             printf("Error updating the tag\r\n");
00096             mCommandFinish=false;
00097         }
00098 
00099         /**
00100          * when the session is open change the led status and ask to write the message
00101          */
00102         virtual void on_session_open(NDefLib::NDefNfcTag *tag,bool success){
00103             if(!success)
00104                 return on_error();
00105             mNfcNucleo->get_led1()=!mNfcNucleo->get_led1();
00106             printf("Session opened\r\n");
00107             tag->write(mMsg);
00108         }
00109 
00110         /**
00111          * if the user ask to update the value it write again the message, otherwise close the session
00112          */
00113         virtual void on_message_write(NDefLib::NDefNfcTag *tag,bool success){
00114             if(!success) {
00115                 return on_error();
00116             }
00117             mNfcNucleo->get_led2()=!mNfcNucleo->get_led2();
00118             printf("Tag wrote\r\n");
00119             if(mRequestRefresh){
00120                 mRequestRefresh=false;
00121                 tag->write(mMsg);
00122             }else {
00123                 tag->close_session();
00124             }
00125             //if-else
00126 
00127         };
00128 
00129         /**
00130          * if the user ask to update the value it open a new session
00131          */
00132         virtual void on_session_close(NDefLib::NDefNfcTag *tag,bool success){
00133             if(!success)
00134                 return on_error();
00135             mNfcNucleo->get_led3()=!mNfcNucleo->get_led3();
00136             printf("Session Close\r\n");
00137             if(mRequestRefresh){
00138                 mRequestRefresh=false;
00139                 tag->open_session();
00140             }else {
00141                 mCommandFinish=true;
00142             }
00143             //if-else
00144         };
00145 
00146 };
00147 
00148 
00149 static volatile bool buttonPress=false; /// true when the user press the message
00150 static volatile bool nfcEvent=false; /// true when the user press the message
00151 
00152 /**
00153  * Call back called when the user press the button.
00154  */
00155 static void set_button_press(){
00156     buttonPress=true;
00157 }//if buttonPress
00158 
00159 static void set_nfc_event_callback(){
00160     nfcEvent=true;
00161 }//if buttonPress
00162 
00163 /**
00164  * Write a custom record that count how many times the user press the button.
00165  */
00166 void sampleAsync_countClick() {
00167     
00168     //instance the board with the default parameters
00169     I2C i2cChannel(XNucleoNFC01A1::DEFAULT_SDA_PIN,XNucleoNFC01A1::DEFAULT_SDL_PIN);
00170     XNucleoNFC01A1 *nfcNucleo = XNucleoNFC01A1::instance(i2cChannel,&set_nfc_event_callback);
00171 
00172     //set the button interrupt
00173     #if defined(TARGET_STM)
00174         InterruptIn userButton(USER_BUTTON);
00175     #else
00176         InterruptIn userButton(SW2);
00177     #endif
00178     userButton.fall(set_button_press);
00179     
00180     M24SR &nfcTag =nfcNucleo->get_M24SR();
00181 
00182    //No call back needed since default behavior is sync
00183     if(nfcTag.get_session()==M24SR::M24SR_SUCCESS) {
00184         nfcTag.manage_I2C_GPO(M24SR::I2C_ANSWER_READY);//Set async mode
00185     }
00186 
00187     //create the NDef message and record
00188     NDefLib::Message msg;
00189     MyRecord rClickCount;
00190     msg.add_record(&rClickCount);
00191     
00192     WriteMyRecordCallback writeMyRecordCallback(nfcNucleo,msg);
00193 
00194     nfcNucleo->get_M24SR().get_NDef_tag().set_callback(&writeMyRecordCallback);
00195     writeMyRecordCallback.update_message();
00196     while(true){
00197         
00198         if(buttonPress){
00199             buttonPress=false;
00200             //change the record content
00201             rClickCount.increment_click();
00202             printf("upgade Ndef message\r\n");
00203             writeMyRecordCallback.update_message();
00204         }//if
00205         if(nfcEvent){
00206             nfcEvent=false;
00207             nfcNucleo->get_M24SR().manage_event();
00208         }//if
00209         //wait next event
00210         __WFE();
00211     }//while
00212 
00213 }//sample_countClick