ST / Mbed OS mbed-os-example-nfc04a1

NFC EEPROM sample application

NFC EEPROM Application based on X-NUCLEO-NFC04A1 expansion board

The application will write an URL to the EEPROM of the NFC tag on your board. This will be able to be read by any NFC device capable of reading NFC tags.

The example uses the EEPROM driver provided for the X-NUCLEO-NFC04A1 expansion board based on the ST25DV04K dynamic NFC/RFID tag.

source/target/NfcControllerToEEPROMAdapter.cpp@3:3b37cd0a18e4, 2021-01-11 (annotated)

Committer:
apalmieri
Date:
Mon Jan 11 11:33:23 2021 +0000
Revision:
3:3b37cd0a18e4
Parent:
0:f3d7ca3d45de 
Update Mbed version block (mbed-os-6.6.0)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
apalmieri 0:f3d7ca3d45de 1 /* mbed Microcontroller Library
apalmieri 0:f3d7ca3d45de 2 * Copyright (c) 2018-2018 ARM Limited
apalmieri 0:f3d7ca3d45de 3 *
apalmieri 0:f3d7ca3d45de 4 * Licensed under the Apache License, Version 2.0 (the "License");
apalmieri 0:f3d7ca3d45de 5 * you may not use this file except in compliance with the License.
apalmieri 0:f3d7ca3d45de 6 * You may obtain a copy of the License at
apalmieri 0:f3d7ca3d45de 7 *
apalmieri 0:f3d7ca3d45de 8 * http://www.apache.org/licenses/LICENSE-2.0
apalmieri 0:f3d7ca3d45de 9 *
apalmieri 0:f3d7ca3d45de 10 * Unless required by applicable law or agreed to in writing, software
apalmieri 0:f3d7ca3d45de 11 * distributed under the License is distributed on an "AS IS" BASIS,
apalmieri 0:f3d7ca3d45de 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
apalmieri 0:f3d7ca3d45de 13 * See the License for the specific language governing permissions and
apalmieri 0:f3d7ca3d45de 14 * limitations under the License.
apalmieri 0:f3d7ca3d45de 15 */
apalmieri 0:f3d7ca3d45de 16
apalmieri 0:f3d7ca3d45de 17 #include "NfcControllerToEEPROMAdapter.h"
apalmieri 0:f3d7ca3d45de 18
apalmieri 0:f3d7ca3d45de 19 #include <algorithm>
apalmieri 0:f3d7ca3d45de 20
apalmieri 0:f3d7ca3d45de 21 #include "nfc/NFCController.h"
apalmieri 0:f3d7ca3d45de 22 #include "nfc/NFCEEPROMDriver.h"
apalmieri 0:f3d7ca3d45de 23 #include "nfc/NFCRemoteInitiator.h"
apalmieri 0:f3d7ca3d45de 24
apalmieri 0:f3d7ca3d45de 25 namespace mbed {
apalmieri 0:f3d7ca3d45de 26 namespace nfc {
apalmieri 0:f3d7ca3d45de 27
apalmieri 0:f3d7ca3d45de 28 ControllerToEEPROMDriverAdapter::ControllerToEEPROMDriverAdapter(
apalmieri 0:f3d7ca3d45de 29 NFCController &controller,
apalmieri 0:f3d7ca3d45de 30 const Span<uint8_t> &buffer
apalmieri 0:f3d7ca3d45de 31 ) :
apalmieri 0:f3d7ca3d45de 32 _nfc_controller(controller),
apalmieri 0:f3d7ca3d45de 33 _eeprom_buffer(buffer),
apalmieri 0:f3d7ca3d45de 34 _current_eeprom_size(buffer.size()),
apalmieri 0:f3d7ca3d45de 35 _session_opened(false)
apalmieri 0:f3d7ca3d45de 36 {
apalmieri 0:f3d7ca3d45de 37 }
apalmieri 0:f3d7ca3d45de 38
apalmieri 0:f3d7ca3d45de 39 ControllerToEEPROMDriverAdapter::~ControllerToEEPROMDriverAdapter()
apalmieri 0:f3d7ca3d45de 40 {
apalmieri 0:f3d7ca3d45de 41 if (_nfc_remote_initiator.get()) {
apalmieri 0:f3d7ca3d45de 42 _nfc_remote_initiator->set_delegate(NULL);
apalmieri 0:f3d7ca3d45de 43 }
apalmieri 0:f3d7ca3d45de 44 _nfc_controller.set_delegate(NULL);
apalmieri 0:f3d7ca3d45de 45 _nfc_controller.cancel_discovery();
apalmieri 0:f3d7ca3d45de 46 }
apalmieri 0:f3d7ca3d45de 47
apalmieri 0:f3d7ca3d45de 48 void ControllerToEEPROMDriverAdapter::reset()
apalmieri 0:f3d7ca3d45de 49 {
apalmieri 0:f3d7ca3d45de 50 _current_eeprom_size = _eeprom_buffer.size();
apalmieri 0:f3d7ca3d45de 51 memset(_eeprom_buffer.data(), 0, _eeprom_buffer.size());
apalmieri 0:f3d7ca3d45de 52
apalmieri 0:f3d7ca3d45de 53 if (_nfc_remote_initiator.get()) {
apalmieri 0:f3d7ca3d45de 54 _nfc_remote_initiator->set_delegate(NULL);
apalmieri 0:f3d7ca3d45de 55 _nfc_remote_initiator.reset();
apalmieri 0:f3d7ca3d45de 56 }
apalmieri 0:f3d7ca3d45de 57
apalmieri 0:f3d7ca3d45de 58 _nfc_controller.initialize();
apalmieri 0:f3d7ca3d45de 59 _nfc_controller.set_delegate(this);
apalmieri 0:f3d7ca3d45de 60
apalmieri 0:f3d7ca3d45de 61 nfc_rf_protocols_bitmask_t protocols = { 0 };
apalmieri 0:f3d7ca3d45de 62 protocols.target_iso_dep = 1;
apalmieri 0:f3d7ca3d45de 63 _nfc_controller.configure_rf_protocols(protocols);
apalmieri 0:f3d7ca3d45de 64
apalmieri 0:f3d7ca3d45de 65 _nfc_controller.start_discovery();
apalmieri 0:f3d7ca3d45de 66 }
apalmieri 0:f3d7ca3d45de 67
apalmieri 0:f3d7ca3d45de 68 size_t ControllerToEEPROMDriverAdapter::read_max_size()
apalmieri 0:f3d7ca3d45de 69 {
apalmieri 0:f3d7ca3d45de 70 return _eeprom_buffer.size();
apalmieri 0:f3d7ca3d45de 71 }
apalmieri 0:f3d7ca3d45de 72
apalmieri 0:f3d7ca3d45de 73 void ControllerToEEPROMDriverAdapter::start_session(bool force)
apalmieri 0:f3d7ca3d45de 74 {
apalmieri 0:f3d7ca3d45de 75 _session_opened = true;
apalmieri 0:f3d7ca3d45de 76 delegate()->on_session_started(true);
apalmieri 0:f3d7ca3d45de 77 }
apalmieri 0:f3d7ca3d45de 78
apalmieri 0:f3d7ca3d45de 79 void ControllerToEEPROMDriverAdapter::end_session()
apalmieri 0:f3d7ca3d45de 80 {
apalmieri 0:f3d7ca3d45de 81 _session_opened = false;
apalmieri 0:f3d7ca3d45de 82 delegate()->on_session_ended(true);
apalmieri 0:f3d7ca3d45de 83 }
apalmieri 0:f3d7ca3d45de 84
apalmieri 0:f3d7ca3d45de 85 void ControllerToEEPROMDriverAdapter::read_bytes(
apalmieri 0:f3d7ca3d45de 86 uint32_t address, uint8_t *bytes, size_t count
apalmieri 0:f3d7ca3d45de 87 ) {
apalmieri 0:f3d7ca3d45de 88 if (address >= _current_eeprom_size) {
apalmieri 0:f3d7ca3d45de 89 delegate()->on_bytes_read(0);
apalmieri 0:f3d7ca3d45de 90 return;
apalmieri 0:f3d7ca3d45de 91 }
apalmieri 0:f3d7ca3d45de 92
apalmieri 0:f3d7ca3d45de 93 size_t size = std::min(count, (size_t) (_current_eeprom_size - address));
apalmieri 0:f3d7ca3d45de 94 memcpy(bytes, _eeprom_buffer.data() + address, size);
apalmieri 0:f3d7ca3d45de 95 delegate()->on_bytes_read(size);
apalmieri 0:f3d7ca3d45de 96 }
apalmieri 0:f3d7ca3d45de 97
apalmieri 0:f3d7ca3d45de 98 void ControllerToEEPROMDriverAdapter::write_bytes(
apalmieri 0:f3d7ca3d45de 99 uint32_t address, const uint8_t *bytes, size_t count
apalmieri 0:f3d7ca3d45de 100 ) {
apalmieri 0:f3d7ca3d45de 101 if (address >= _current_eeprom_size) {
apalmieri 0:f3d7ca3d45de 102 delegate()->on_bytes_written(0);
apalmieri 0:f3d7ca3d45de 103 return;
apalmieri 0:f3d7ca3d45de 104 }
apalmieri 0:f3d7ca3d45de 105
apalmieri 0:f3d7ca3d45de 106 size_t size = std::min(count, (size_t) (_current_eeprom_size - address));
apalmieri 0:f3d7ca3d45de 107 memcpy(_eeprom_buffer.data() + address, bytes, size);
apalmieri 0:f3d7ca3d45de 108 delegate()->on_bytes_written(size);
apalmieri 0:f3d7ca3d45de 109 }
apalmieri 0:f3d7ca3d45de 110
apalmieri 0:f3d7ca3d45de 111 void ControllerToEEPROMDriverAdapter::read_size()
apalmieri 0:f3d7ca3d45de 112 {
apalmieri 0:f3d7ca3d45de 113 delegate()->on_size_read(true, _current_eeprom_size);
apalmieri 0:f3d7ca3d45de 114 }
apalmieri 0:f3d7ca3d45de 115
apalmieri 0:f3d7ca3d45de 116 void ControllerToEEPROMDriverAdapter::write_size(size_t count)
apalmieri 0:f3d7ca3d45de 117 {
apalmieri 0:f3d7ca3d45de 118 if (count > (size_t) _eeprom_buffer.size()) {
apalmieri 0:f3d7ca3d45de 119 delegate()->on_size_written(false);
apalmieri 0:f3d7ca3d45de 120 } else {
apalmieri 0:f3d7ca3d45de 121 _current_eeprom_size = count;
apalmieri 0:f3d7ca3d45de 122 delegate()->on_size_written(true);
apalmieri 0:f3d7ca3d45de 123 }
apalmieri 0:f3d7ca3d45de 124 }
apalmieri 0:f3d7ca3d45de 125
apalmieri 0:f3d7ca3d45de 126 void ControllerToEEPROMDriverAdapter::erase_bytes(uint32_t address, size_t count)
apalmieri 0:f3d7ca3d45de 127 {
apalmieri 0:f3d7ca3d45de 128 if (address >= _current_eeprom_size) {
apalmieri 0:f3d7ca3d45de 129 delegate()->on_bytes_erased(0);
apalmieri 0:f3d7ca3d45de 130 return;
apalmieri 0:f3d7ca3d45de 131 }
apalmieri 0:f3d7ca3d45de 132
apalmieri 0:f3d7ca3d45de 133 size_t size = std::min(count, (size_t) (_current_eeprom_size - address));
apalmieri 0:f3d7ca3d45de 134 memset(_eeprom_buffer.data() + address, 0, size);
apalmieri 0:f3d7ca3d45de 135 delegate()->on_bytes_erased(size);
apalmieri 0:f3d7ca3d45de 136 }
apalmieri 0:f3d7ca3d45de 137
apalmieri 0:f3d7ca3d45de 138 /* ------------------------------------------------------------------------
apalmieri 0:f3d7ca3d45de 139 * Implementation of NFCRemoteInitiator::Delegate
apalmieri 0:f3d7ca3d45de 140 */
apalmieri 0:f3d7ca3d45de 141 void ControllerToEEPROMDriverAdapter::on_connected() { }
apalmieri 0:f3d7ca3d45de 142
apalmieri 0:f3d7ca3d45de 143 void ControllerToEEPROMDriverAdapter::on_disconnected()
apalmieri 0:f3d7ca3d45de 144 {
apalmieri 0:f3d7ca3d45de 145 // reset the state of the remote initiator
apalmieri 0:f3d7ca3d45de 146 _nfc_remote_initiator->set_delegate(NULL);
apalmieri 0:f3d7ca3d45de 147 _nfc_remote_initiator.reset();
apalmieri 0:f3d7ca3d45de 148
apalmieri 0:f3d7ca3d45de 149 // restart peer discovery
apalmieri 0:f3d7ca3d45de 150 _nfc_controller.start_discovery();
apalmieri 0:f3d7ca3d45de 151 }
apalmieri 0:f3d7ca3d45de 152
apalmieri 0:f3d7ca3d45de 153 void ControllerToEEPROMDriverAdapter::parse_ndef_message(const Span<const uint8_t> &buffer)
apalmieri 0:f3d7ca3d45de 154 {
apalmieri 0:f3d7ca3d45de 155 if (_session_opened) {
apalmieri 0:f3d7ca3d45de 156 return;
apalmieri 0:f3d7ca3d45de 157 }
apalmieri 0:f3d7ca3d45de 158
apalmieri 0:f3d7ca3d45de 159 if (buffer.size() > _eeprom_buffer.size()) {
apalmieri 0:f3d7ca3d45de 160 return;
apalmieri 0:f3d7ca3d45de 161 }
apalmieri 0:f3d7ca3d45de 162
apalmieri 0:f3d7ca3d45de 163 _current_eeprom_size = buffer.size();
apalmieri 0:f3d7ca3d45de 164 memcpy(_eeprom_buffer.data(), buffer.data(), _current_eeprom_size);
apalmieri 0:f3d7ca3d45de 165 }
apalmieri 0:f3d7ca3d45de 166
apalmieri 0:f3d7ca3d45de 167 size_t ControllerToEEPROMDriverAdapter::build_ndef_message(const Span<uint8_t> &buffer)
apalmieri 0:f3d7ca3d45de 168 {
apalmieri 0:f3d7ca3d45de 169 if (_session_opened) {
apalmieri 0:f3d7ca3d45de 170 return 0;
apalmieri 0:f3d7ca3d45de 171 }
apalmieri 0:f3d7ca3d45de 172
apalmieri 0:f3d7ca3d45de 173 if ((size_t) buffer.size() < _current_eeprom_size) {
apalmieri 0:f3d7ca3d45de 174 return 0;
apalmieri 0:f3d7ca3d45de 175 }
apalmieri 0:f3d7ca3d45de 176
apalmieri 0:f3d7ca3d45de 177 memcpy(buffer.data(), _eeprom_buffer.data(), _current_eeprom_size);
apalmieri 0:f3d7ca3d45de 178 return _current_eeprom_size;
apalmieri 0:f3d7ca3d45de 179 }
apalmieri 0:f3d7ca3d45de 180
apalmieri 0:f3d7ca3d45de 181 /* ------------------------------------------------------------------------
apalmieri 0:f3d7ca3d45de 182 * Implementation of NFCController::Delegate
apalmieri 0:f3d7ca3d45de 183 */
apalmieri 0:f3d7ca3d45de 184 void ControllerToEEPROMDriverAdapter::on_discovery_terminated(
apalmieri 0:f3d7ca3d45de 185 nfc_discovery_terminated_reason_t reason
apalmieri 0:f3d7ca3d45de 186 ) {
apalmieri 0:f3d7ca3d45de 187 if(reason != nfc_discovery_terminated_completed) {
apalmieri 0:f3d7ca3d45de 188 _nfc_controller.start_discovery();
apalmieri 0:f3d7ca3d45de 189 }
apalmieri 0:f3d7ca3d45de 190 }
apalmieri 0:f3d7ca3d45de 191
apalmieri 0:f3d7ca3d45de 192 void ControllerToEEPROMDriverAdapter::on_nfc_initiator_discovered(
apalmieri 0:f3d7ca3d45de 193 const SharedPtr<NFCRemoteInitiator> &nfc_initiator
apalmieri 0:f3d7ca3d45de 194 ) {
apalmieri 0:f3d7ca3d45de 195 // setup the local remote initiator
apalmieri 0:f3d7ca3d45de 196 _nfc_remote_initiator = nfc_initiator;
apalmieri 0:f3d7ca3d45de 197 _nfc_remote_initiator->set_delegate(this);
apalmieri 0:f3d7ca3d45de 198 _nfc_remote_initiator->connect();
apalmieri 0:f3d7ca3d45de 199 }
apalmieri 0:f3d7ca3d45de 200
apalmieri 0:f3d7ca3d45de 201 } // namespace nfc
apalmieri 0:f3d7ca3d45de 202 } // namespace mbed
apalmieri 0:f3d7ca3d45de 203