main.cpp

00001 /**
00002   ******************************************************************************
00003   * @file       main.cpp
00004   * @author     ST Central Labs
00005   * @version V2.0.0
00006   * @date    28 Apr 2017
00007   * @brief      This demo writes an ndef message with an url inside.
00008   ******************************************************************************
00009   * @attention
00010   *
00011   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
00012   *
00013   * Redistribution and use in source and binary forms, with or without modification,
00014   * are permitted provided that the following conditions are met:
00015   *   1. Redistributions of source code must retain the above copyright notice,
00016   *      this list of conditions and the following disclaimer.
00017   *   2. Redistributions in binary form must reproduce the above copyright notice,
00018   *      this list of conditions and the following disclaimer in the documentation
00019   *      and/or other materials provided with the distribution.
00020   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00021   *      may be used to endorse or promote products derived from this software
00022   *      without specific prior written permission.
00023   *
00024   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00025   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00026   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00027   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00028   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00029   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00030   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00031   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00032   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00033   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00034   *
00035   ******************************************************************************
00036   */
00037 
00038 #include "mbed.h"
00039 #include "XNucleoNFC01A1.h"
00040 #include "NDefLib/NDefNfcTag.h"
00041 #include "NDefLib/RecordType/RecordURI.h"
00042 
00043 /**
00044  * Write a Ndef URI message linking to st.com site.
00045  * Write an NDef message with a Uri record linking the st.com site
00046  * @param nfcNucleo expansion board where write the NDef message
00047  */  
00048 static void write_url(XNucleoNFC01A1 *nfcNucleo) {
00049     //retrieve the NdefLib interface
00050     NDefLib::NDefNfcTag& tag = nfcNucleo->get_M24SR().get_NDef_tag();
00051     
00052     //open the i2c session with the nfc chip
00053     if (tag.open_session()) {
00054         printf("Session opened\n\r");
00055         nfcNucleo->get_led1()=1;
00056         
00057         //create the NDef message and record
00058         NDefLib::Message msg;
00059         NDefLib::RecordURI rUri(NDefLib::RecordURI::HTTP_WWW,"st.com");
00060         msg.add_record(&rUri);
00061 
00062         //write the tag
00063         if (tag.write(msg)) {
00064             printf("Tag written\n\r");
00065             nfcNucleo->get_led2()=1;
00066         } else {
00067             printf("Error writing \n\r");
00068         }//if-else
00069 
00070         //close the i2c session
00071         if (tag.close_session()) {
00072            printf("Session closed\n\r");
00073            nfcNucleo->get_led3()=1;
00074         } else {
00075            printf("Error closing the session\n\r");
00076         }//if-else
00077             
00078     } else {
00079         printf("Error opening the session\n\r");
00080     }
00081 }
00082 
00083 /**
00084  * Read a NDef message and print content and type of all the uri record inside 
00085  * the message
00086  * @param nfcNucleo expansion board from where read the message
00087  */
00088 static void read_url(XNucleoNFC01A1 *nfcNucleo) {
00089     //retrieve the NdefLib interface
00090     NDefLib::NDefNfcTag& tag = nfcNucleo->get_M24SR().get_NDef_tag();
00091     
00092     //open the i2c session with the nfc chip
00093     if (tag.open_session()) {
00094         printf("Session opened\n\r");
00095         nfcNucleo->get_led1() = 1;
00096         
00097         //create the NDef message and record
00098         NDefLib::Message msg;
00099         
00100         //read the tag
00101         if (tag.read(&msg)) {
00102             const uint32_t nRecords = msg.get_N_records();
00103             printf("Tag read: %d record\n\r", msg.get_N_records());
00104             for (int i =0 ;i<nRecords ;i++) {
00105                 if (msg[i]->get_type()== NDefLib::Record::TYPE_URI) {
00106                     NDefLib::RecordURI *rUri = (NDefLib::RecordURI *)msg[i];
00107                     printf("UriType: %x\n\rUriContent: %s\n\r",
00108                         rUri->get_uri_id(),
00109                         rUri->get_content().c_str());
00110                 }//if
00111             }//for
00112             //free the read records
00113             NDefLib::Message::remove_and_delete_all_record(msg);
00114         } else {
00115             printf("Error Reading \n\r");
00116         }//if-else
00117 
00118         //close the i2c session
00119         if (tag.close_session()) {
00120            printf("Session closed\n\r");
00121            nfcNucleo->get_led3() = 1;
00122         } else {
00123            printf("Error closing the session\n\r");
00124         }//if-else
00125             
00126     } else {
00127         printf("Error opening the session\n\r");
00128     }
00129 }
00130 
00131 static volatile bool buttonPress=false;
00132 
00133 static void set_button_press(){
00134     buttonPress=true;
00135 }//if buttonPress
00136 
00137 /**
00138  * Write a Ndef URI message linking to st.com site and than read the message from
00139  * the Nfc tag.
00140  * 
00141  */
00142 int main(void){
00143     
00144     //use default board pinout
00145     I2C i2cChannel(XNucleoNFC01A1::DEFAULT_SDA_PIN,XNucleoNFC01A1::DEFAULT_SDL_PIN);
00146     XNucleoNFC01A1 *nfcNucleo = XNucleoNFC01A1::instance(i2cChannel,NULL,
00147         XNucleoNFC01A1::DEFAULT_GPO_PIN,XNucleoNFC01A1::DEFAULT_RF_DISABLE_PIN,
00148         XNucleoNFC01A1::DEFAULT_LED1_PIN,XNucleoNFC01A1::DEFAULT_LED2_PIN,
00149         XNucleoNFC01A1::DEFAULT_LED3_PIN);
00150     
00151     printf("System Init done: !\n\r");
00152     
00153     // write an URI message
00154     write_url(nfcNucleo);
00155     
00156 //if run on a nucleo board enable the user button for read the ndef record
00157 #if defined(TARGET_STM)
00158     InterruptIn userButton(USER_BUTTON);    
00159     userButton.fall(set_button_press);
00160      while(true){
00161         if (buttonPress) {
00162             read_url(nfcNucleo);
00163             buttonPress=false;
00164         }//if
00165         //wait next event
00166         __WFE();
00167     }//while
00168 #else
00169     read_url(nfcNucleo);
00170 #endif
00171 }
00172 
00173 
00174 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/