ST / Mbed OS mbed-os-example-NFC01A1

A simple mbed OS application providing an example of asynchronous access to the X-NUCLEO_NFC01A1 Dynamic NFC Tag board.

Dependencies:   NDefLib X_NUCLEO_NFC01A1

Fork of mbed-os-example-NFC01A1 by Nicola Capovilla

The application provides a simple example of asynchronous access to the X-NUCLEO-NFC01A1 Dynamic NFC Tag Expansion Board. It represents the multi-threaded mbed OS 5 version of the mbed classic HelloWorld_Async_NFC01A1 application.
The program writes a URI link to the M24SR dynamic tag using the asynchronous programming model. The URI can then be read and printed on the serial console by pressing the user button and/or via RF from an NFC enabled smartphone/tablet.

ReadUriCallbacks.h@2:e06d881b4b3c, 2017-08-11 (annotated)

Committer:
nikapov
Date:
Fri Aug 11 09:19:31 2017 +0000
Revision:
2:e06d881b4b3c
Parent:
0:3e88cb856f63 
Use one thread only to handle the events.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nikapov 0:3e88cb856f63 1 /**
nikapov 0:3e88cb856f63 2 ******************************************************************************
nikapov 0:3e88cb856f63 3 * @file ReadUriCallbacks.cpp
nikapov 0:3e88cb856f63 4 * @date 12/07/2017
nikapov 0:3e88cb856f63 5 * @brief Class to read and print a URI tag.
nikapov 0:3e88cb856f63 6 ******************************************************************************
nikapov 0:3e88cb856f63 7 *
nikapov 0:3e88cb856f63 8 * COPYRIGHT(c) 2017 STMicroelectronics
nikapov 0:3e88cb856f63 9 *
nikapov 0:3e88cb856f63 10 * Redistribution and use in source and binary forms, with or without modification,
nikapov 0:3e88cb856f63 11 * are permitted provided that the following conditions are met:
nikapov 0:3e88cb856f63 12 * 1. Redistributions of source code must retain the above copyright notice,
nikapov 0:3e88cb856f63 13 * this list of conditions and the following disclaimer.
nikapov 0:3e88cb856f63 14 * 2. Redistributions in binary form must reproduce the above copyright notice,
nikapov 0:3e88cb856f63 15 * this list of conditions and the following disclaimer in the documentation
nikapov 0:3e88cb856f63 16 * and/or other materials provided with the distribution.
nikapov 0:3e88cb856f63 17 * 3. Neither the name of STMicroelectronics nor the names of its contributors
nikapov 0:3e88cb856f63 18 * may be used to endorse or promote products derived from this software
nikapov 0:3e88cb856f63 19 * without specific prior written permission.
nikapov 0:3e88cb856f63 20 *
nikapov 0:3e88cb856f63 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
nikapov 0:3e88cb856f63 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
nikapov 0:3e88cb856f63 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
nikapov 0:3e88cb856f63 24 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
nikapov 0:3e88cb856f63 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
nikapov 0:3e88cb856f63 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
nikapov 0:3e88cb856f63 27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
nikapov 0:3e88cb856f63 28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
nikapov 0:3e88cb856f63 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nikapov 0:3e88cb856f63 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nikapov 0:3e88cb856f63 31 *
nikapov 0:3e88cb856f63 32 ******************************************************************************
nikapov 0:3e88cb856f63 33 */
nikapov 0:3e88cb856f63 34
nikapov 0:3e88cb856f63 35 #include "mbed.h"
nikapov 0:3e88cb856f63 36 #include "NDefLib/RecordType/RecordURI.h"
nikapov 0:3e88cb856f63 37
nikapov 0:3e88cb856f63 38 /**
nikapov 0:3e88cb856f63 39 * Chain of callback that will read a NDef Message and print all the
nikapov 0:3e88cb856f63 40 * record of type URI.
nikapov 0:3e88cb856f63 41 * After each operation the class will switch on a led
nikapov 0:3e88cb856f63 42 */
nikapov 0:3e88cb856f63 43 class ReadUriCallbacks : public NDefLib::NDefNfcTag::Callbacks {
nikapov 0:3e88cb856f63 44
nikapov 0:3e88cb856f63 45 DigitalOut &mOnOpenSession;
nikapov 0:3e88cb856f63 46 DigitalOut &mOnRead;
nikapov 0:3e88cb856f63 47 DigitalOut &mOnCloseSession;
nikapov 0:3e88cb856f63 48
nikapov 0:3e88cb856f63 49 NDefLib::Message mMsg;
nikapov 0:3e88cb856f63 50
nikapov 0:3e88cb856f63 51 public:
nikapov 0:3e88cb856f63 52
nikapov 0:3e88cb856f63 53 /**
nikapov 0:3e88cb856f63 54 * create the callback chain
nikapov 0:3e88cb856f63 55 * @param onOpenSession led to switch on when the session open
nikapov 0:3e88cb856f63 56 * @param onWrite led to switch on when the write end
nikapov 0:3e88cb856f63 57 * @param onCloseSession led to switch on when the session end
nikapov 0:3e88cb856f63 58 */
nikapov 0:3e88cb856f63 59 ReadUriCallbacks(DigitalOut &onOpenSession,DigitalOut &onRead,
nikapov 0:3e88cb856f63 60 DigitalOut &onCloseSession):mOnOpenSession(onOpenSession),
nikapov 0:3e88cb856f63 61 mOnRead(onRead),mOnCloseSession(onCloseSession){};
nikapov 0:3e88cb856f63 62
nikapov 0:3e88cb856f63 63 /**
nikapov 0:3e88cb856f63 64 * crate the new message and write it
nikapov 0:3e88cb856f63 65 * @param tag tag where write the message
nikapov 0:3e88cb856f63 66 * @param success true if the session correctly open
nikapov 0:3e88cb856f63 67 */
nikapov 0:3e88cb856f63 68 virtual void on_session_open(NDefLib::NDefNfcTag *tag,bool success){
nikapov 0:3e88cb856f63 69 if (!success) {
nikapov 0:3e88cb856f63 70 printf("Error opening the session\r\n");
nikapov 0:3e88cb856f63 71 }//else
nikapov 0:3e88cb856f63 72 printf("Session opened\r\n");
nikapov 0:3e88cb856f63 73 //ask to have an interrupt when the command finish
nikapov 0:3e88cb856f63 74 mOnOpenSession=1;
nikapov 0:3e88cb856f63 75 mOnCloseSession=0;
nikapov 0:3e88cb856f63 76
nikapov 0:3e88cb856f63 77 tag->read(&mMsg);
nikapov 0:3e88cb856f63 78 }
nikapov 0:3e88cb856f63 79
nikapov 0:3e88cb856f63 80 /**
nikapov 0:3e88cb856f63 81 * request to close the session
nikapov 0:3e88cb856f63 82 * @param tag tag where close the session
nikapov 0:3e88cb856f63 83 * @param success true if the message is correctly wrote
nikapov 0:3e88cb856f63 84 * @param message wrote
nikapov 0:3e88cb856f63 85 */
nikapov 0:3e88cb856f63 86 virtual void on_message_read(NDefLib::NDefNfcTag *tag,bool success,
nikapov 0:3e88cb856f63 87 const NDefLib::Message*){
nikapov 0:3e88cb856f63 88
nikapov 0:3e88cb856f63 89 if (!success) {
nikapov 0:3e88cb856f63 90 printf("Error Reading tag!\r\n");
nikapov 0:3e88cb856f63 91 } else {
nikapov 0:3e88cb856f63 92 const uint32_t nRecords =mMsg.get_N_records();
nikapov 0:3e88cb856f63 93 printf("Read %d records!\r\n",nRecords);
nikapov 0:3e88cb856f63 94 for (uint32_t i=0;i<nRecords;i++) {
nikapov 0:3e88cb856f63 95 if (mMsg[i]->get_type()== NDefLib::Record::TYPE_URI) {
nikapov 0:3e88cb856f63 96 NDefLib::RecordURI *rUri = (NDefLib::RecordURI *)mMsg[i];
nikapov 0:3e88cb856f63 97 printf("UriType: %x\r\nUriContent: %s\r\n",
nikapov 0:3e88cb856f63 98 rUri->get_uri_id(),
nikapov 0:3e88cb856f63 99 rUri->get_content().c_str());
nikapov 0:3e88cb856f63 100 }//if
nikapov 0:3e88cb856f63 101 }//for
nikapov 0:3e88cb856f63 102 NDefLib::Message::remove_and_delete_all_record(mMsg);
nikapov 0:3e88cb856f63 103 mOnRead=1;
nikapov 0:3e88cb856f63 104 }//if-else
nikapov 0:3e88cb856f63 105 tag->close_session();
nikapov 0:3e88cb856f63 106 }
nikapov 0:3e88cb856f63 107
nikapov 0:3e88cb856f63 108 /**
nikapov 0:3e88cb856f63 109 * switch on the led
nikapov 0:3e88cb856f63 110 * @param tag where the session is closed
nikapov 0:3e88cb856f63 111 * @param success true if the session is correctly close
nikapov 0:3e88cb856f63 112 */
nikapov 0:3e88cb856f63 113 virtual void on_session_close(NDefLib::NDefNfcTag*, bool success) {
nikapov 0:3e88cb856f63 114 if (success) {
nikapov 0:3e88cb856f63 115 printf("Session closed\r\n");
nikapov 0:3e88cb856f63 116 mOnCloseSession=1;
nikapov 0:3e88cb856f63 117 mOnOpenSession=0;
nikapov 0:3e88cb856f63 118 mOnRead=0;
nikapov 0:3e88cb856f63 119 } else {
nikapov 0:3e88cb856f63 120 printf("Error opening the session\r\n");
nikapov 0:3e88cb856f63 121 }
nikapov 0:3e88cb856f63 122 }
nikapov 0:3e88cb856f63 123 };