ST Expansion SW Team / Mbed OS mbed-os-nfc04a1

Example program for the X-NUCLEO-NFC04A1

Dependencies:   BSP libNDEF ST25DV

X-NUCLEO-NFC04A1 dynamic NFC/RFID tag IC expansion board Firmware Package

Introduction

This firmware package includes Components Device Drivers, Board Support Package and example applications for STMicroelectronics X-NUCLEO-NFC04A1 dynamic NFC/RFID tag IC expansion board.

Example Application

This program gives the User the possibility to read or write the tag of the X-NUCLEO-NFC04A1. The user needs an NFC enabled device as a smartphone that has to be at least 10 cm close to the antenna of the X-NUCLEO-NFC04A1. The LEDs indicate the operational mode:

  • LED1 is on: by reading the tag the User obtains the parameters of the WiFi access points.
  • LED2 is on: by reading the tag the User is redirected to a website through the custom browser of the smartphone.
  • LED3 is on: the User can overwrite the value of the tag through the use of any NFC application.

Tested Platforms

This firmware has been tested on STM32 NUCLEO-F401RE

source/main.cpp

Committer:
DiegoOstuni
Date:
2019-11-14
Revision:
0:3f1a69fc394e

File content as of revision 0:3f1a69fc394e:

/**
 ******************************************************************************
 * @file    main.cpp
 * @author  STMicroelectronics
 * @version V1.0.0
 * @date    05 April 2019
 * @brief    test application for the STMicrolectronics
 *          X-NUCLEO-NFC04A1. NFC tag based on ST25DV device.
 *          This application makes use of C++ classes obtained from the C
 *          components' drivers.
 ******************************************************************************
*/
#include "mbed.h"
#include "x_nucleo_nfc04.h"
#include "stdio.h"
#include "string.h"

using namespace std;

DigitalOut led_1(D5);
DigitalOut led_2(D4);
DigitalOut led_3(D2);
DigitalOut LPD(D7);
DigitalIn MISO(D12);
I2C i2cChannel(I2C_SDA, I2C_SCL);
DigitalIn uButton(BUTTON1);
X_Nucleo_NFC04 X_Nucleo_Nfc04(&i2cChannel, &led_1, &led_2, &led_3, &LPD, &MISO);

int main()                          
{

  const char uri_write_message[] = "polito.it";   // Uri message to write in the tag
  const char uri_write_protocol[] = URI_ID_0x01_STRING; // Uri protocol to write in the tag
  string uri_write = string(uri_write_protocol) + string(uri_write_message);



  const char SSID[] = "CLAB1"; // WiFi SSID to write in the tag
  Ndef_Wifi_Authentication_t Auth = NDEF_WIFI_AUTHENTICATION_WPA2;
  Ndef_Wifi_Encryption_t Encrypt = NDEF_WIFI_ENCRYPTION_AES;
  const char NetKey[] = "STM32ODE"; // WiFi password to write in the tag


  if(X_Nucleo_Nfc04.begin(&i2cChannel, &LPD) == 0) {
    printf("System Init done!");
    X_Nucleo_Nfc04.ledOn(&led_3);
  } else {
    printf("System Init failed!");
    while(1);
  }


    int ButtonPressed = 1;

    /* BY pressing the button the option to write the WiFi on the tag, or to write a link( or read from it ) is enabled */
    while(1)
    {
        /* Toggle ButtonPressed variable everytime button is pressed */
        if(uButton.read() == 0)
        {
            ButtonPressed++;
            if(ButtonPressed == 4)
                ButtonPressed = 1;
            while( uButton.read() == 0 ); //Debouncing
        }


        if(ButtonPressed == 1)
        {

            X_Nucleo_Nfc04.ledOn(&led_1);
            X_Nucleo_Nfc04.ledOff(&led_2);
               X_Nucleo_Nfc04.ledOff(&led_3);
            wait_ms(100);
            if(X_Nucleo_Nfc04.writeWiFi(SSID, Auth, Encrypt, NetKey, &i2cChannel)) {
                /* Write failed! */
            }
        }
        if(ButtonPressed == 2)
        {

            X_Nucleo_Nfc04.ledOn(&led_2);
            X_Nucleo_Nfc04.ledOff(&led_1);
               X_Nucleo_Nfc04.ledOff(&led_3);
            wait_ms(100);
            if(X_Nucleo_Nfc04.writeURI(uri_write_protocol, uri_write_message, "", &i2cChannel)) {
                /* Write failed! */
            }
        }
        if(ButtonPressed == 3)
        {
               X_Nucleo_Nfc04.ledOn(&led_3);
               X_Nucleo_Nfc04.ledOff(&led_1);
               X_Nucleo_Nfc04.ledOff(&led_2);
            // Prepare device to readURI from NFC device
            string uri_read = X_Nucleo_Nfc04.readURI( &i2cChannel );

          if(uri_read == "\0") {
              /* Read failed! */
          }


          if(strcmp( uri_read.c_str(), uri_write.c_str() ) == 0) {
              /* Successfully written and read! */
              ButtonPressed = 0;

          } else {
              /* Read bad string! */
               X_Nucleo_Nfc04.ledOff(&led_3);
               X_Nucleo_Nfc04.ledOff(&led_1);
               X_Nucleo_Nfc04.ledOff(&led_2);
          }

        }
    }





}//end of main