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Merge pull request #4 from ABOSTM/ST25DV_EXAMPLES
Add examples: HelloWorld and SimpleWrite
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‎README.md‎

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```
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## Examples
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There are 2 examples with the ST25DV library:
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* ST25DV_HelloWorld: This application writes a URI tag on the device. It records an URI.
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When the NFC module is started and ready, the message "Sytstem init done!" is displayed on the monitor window.
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Next, the tag is written, we wait few seconds, we read the same tag and print it on the monitor window.
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You can test this application by connecting it with your smartphone.
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On Android, download a NFC Tools. Then start the app, check if NFC is activated
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on your smartphone. Put your smartphone near the tag, you can read it. You can
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write a tag with this app.
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* ST25DV_SimpleWrite: This application writes a NDEF message, containing a URI record, to the tag.
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When the NFC module is started and ready, the message "System init done!" is displayed on the monitor window.
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Next, the tag is written with a URI.
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You can test this application by tapping the tag with your smartphone.
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On Android, check if NFC is activated on your smartphone.
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Put your smartphone near the tag to read it.
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The preferred Internet Browser is automatically opened with the provided URI.
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## Documentation
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You can find the source files at

‎examples/ST25DV_HelloWorld/ST25DV_HelloWorld.ino‎

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/**
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******************************************************************************
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* @file ST25DV_HelloWorld.ino
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* @author STMicroelectronics
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* @version V1.0.0
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* @date 22 November 2017
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* @brief Arduino test application for the STMicrolectronics
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* ST25DV NFC device.
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* This application makes use of C++ classes obtained from the C
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* components' drivers.
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******************************************************************************
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* @attention
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*
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* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/**
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******************************************************************************
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* How to use this sketch
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*
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* This sketch uses the I2C interface to communicate with the NFC device.
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* It writes an NFC tag type URI (Uniform Resource Identifier) and reads this same tag.
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* Choose the uri by changing the content of uri_write.
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*
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* When the NFC module is started and ready, the message "Sytstem init done!" is
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* displayed on the monitor window. Next, the tag is written, read and printed on
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* the monitor window.
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*
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* You can also use your smartphone to read/write a tag.
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* On Android, download a NFC Tools. Then start the app, check if NFC is activated
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* on your smartphone. Put your smartphone near the tag, you can read it. You can
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* write a tag with this app.
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******************************************************************************
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*/
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#include "ST25DVSensor.h"
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#define SerialPort Serial
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#if defined(ARDUINO_B_L4S5I_IOT01A)
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// Pin definitions for board B-L4S5I_IOT01A
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#define GPO_PIN PE4
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#define LPD_PIN PE2
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#define SDA_PIN PB11
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#define SCL_PIN PB10
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#define WireNFC MyWire
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TwoWire MyWire(SDA_PIN, SCL_PIN);
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#else
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// Please define the pin and wire instance used for your board
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// #define GPO_PIN PE4
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// #define LPD_PIN PE2
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// #define SDA_PIN PB11
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// #define SCL_PIN PB10
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#define WireNFC Wire // Default wire instance
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#endif
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#if !defined(GPO_PIN) || !defined(LPD_PIN)
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#error define the pin and wire instance used for your board
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#endif
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void setup() {
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const char uri_write_message[] = "st.com/st25"; // Uri message to write in the tag
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const char uri_write_protocol[] = URI_ID_0x01_STRING; // Uri protocol to write in the tag
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String uri_write = String(uri_write_protocol) + String(uri_write_message);
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String uri_read;
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// Initialize serial for output.
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SerialPort.begin(115200);
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// The wire instance used can be omited in case you use default Wire instance
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if(st25dv.begin(GPO_PIN, LPD_PIN, &WireNFC) == 0) {
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SerialPort.println("System Init done!");
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} else {
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SerialPort.println("System Init failed!");
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while(1);
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}
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if(st25dv.writeURI(uri_write_protocol, uri_write_message, "")) {
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SerialPort.println("Write failed!");
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while(1);
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}
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delay(100);
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if(st25dv.readURI(&uri_read)) {
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SerialPort.println("Read failed!");
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while(1);
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}
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SerialPort.println(uri_read.c_str());
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if(strcmp(uri_read.c_str(), uri_write.c_str()) == 0) {
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SerialPort.println("Successfully written and read!");
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} else {
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SerialPort.println("Read bad string!");
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}
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}
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void loop() {
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//empty loop
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}

‎examples/ST25DV_SimpleWrite/ST25DV_SimpleWrite.ino‎

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/**
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******************************************************************************
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* @file ST25DV_SimpleWrite.ino
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* @author STMicroelectronics
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* @version V1.0.0
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* @date 22 November 2017
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* @brief Arduino test application for the STMicrolectronics
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* ST25DV NFC device.
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* This application makes use of C++ classes obtained from the C
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* components' drivers.
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******************************************************************************
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* @attention
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*
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* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/**
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******************************************************************************
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* How to use this sketch
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*
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* This sketch uses the I2C interface to communicate with the NFC device.
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* It writes an NFC tag type URI (Uniform Resource Identifier).
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* Choose the uri by changing the content of uri_write.
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*
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* When the NFC module is started and ready, the message "Sytstem init done!" is
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* displayed on the monitor window. Next, the tag is written with the content
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* printed on the monitor window.
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*
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* You can use your smartphone to read the tag.
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* On Android, check if NFC is activated on your smartphone.
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* Put your smartphone near the tag to natively read it.
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* The preferred Internet Browser is automatically opened with the provided URI.
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******************************************************************************
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*/
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#include "ST25DVSensor.h"
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#define SerialPort Serial
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#if defined(ARDUINO_B_L4S5I_IOT01A)
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// Pin definitions for board B-L4S5I_IOT01A
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#define GPO_PIN PE4
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#define LPD_PIN PE2
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#define SDA_PIN PB11
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#define SCL_PIN PB10
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#define WireNFC MyWire
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TwoWire MyWire(SDA_PIN, SCL_PIN);
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#else
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// Please define the pin and wire instance used for your board
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// #define GPO_PIN PE4
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// #define LPD_PIN PE2
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// #define SDA_PIN PB11
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// #define SCL_PIN PB10
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#define WireNFC Wire // Default wire instance
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#endif
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#if !defined(GPO_PIN) || !defined(LPD_PIN)
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#error define the pin and wire instance used for your board
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#endif
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#if !defined(GPO_PIN) || !defined(LPD_PIN)
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#error define the pin and wire instance used for your board
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#endif
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void setup() {
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const char uri_write_message[] = "st.com/st25"; // Uri message to write in the tag
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const char uri_write_protocol[] = URI_ID_0x01_STRING; // Uri protocol to write in the tag
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String uri_write = String(uri_write_protocol) + String(uri_write_message);
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// Initialize serial for output.
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SerialPort.begin(115200);
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// The wire instance used can be omited in case you use default Wire instance
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if(st25dv.begin(GPO_PIN, LPD_PIN, &WireNFC) == 0) {
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SerialPort.println("System Init done!");
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} else {
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SerialPort.println("System Init failed!");
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while(1);
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}
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if(st25dv.writeURI(uri_write_protocol, uri_write_message, "")) {
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SerialPort.println("Write failed!");
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while(1);
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}
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}
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void loop() {
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//empty loop
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}

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