Demonstration of possible usage of the GattServer
Dependents: mbed-os-example-ble-GattServer_ECG
source/BLEProcess.h@20:ec2a8ac43adb, 2019-08-15 (annotated)
- Committer:
- mbed_official
- Date:
- Thu Aug 15 17:01:38 2019 +0100
- Revision:
- 20:ec2a8ac43adb
- Parent:
- 19:622c672f6d5f
Merge pull request #252 from donatieng/mbed_os_update
Update Master branch to use Mbed OS 5.13.1
.
Commit copied from https://github.com/ARMmbed/mbed-os-example-ble
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 14:de95c96e3305 | 1 | /* mbed Microcontroller Library |
mbed_official | 14:de95c96e3305 | 2 | * Copyright (c) 2017 ARM Limited |
mbed_official | 14:de95c96e3305 | 3 | * |
mbed_official | 14:de95c96e3305 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 14:de95c96e3305 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 14:de95c96e3305 | 6 | * You may obtain a copy of the License at |
mbed_official | 14:de95c96e3305 | 7 | * |
mbed_official | 14:de95c96e3305 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 14:de95c96e3305 | 9 | * |
mbed_official | 14:de95c96e3305 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 14:de95c96e3305 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 14:de95c96e3305 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 14:de95c96e3305 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 14:de95c96e3305 | 14 | * limitations under the License. |
mbed_official | 14:de95c96e3305 | 15 | */ |
mbed_official | 14:de95c96e3305 | 16 | |
mbed_official | 14:de95c96e3305 | 17 | #ifndef GATT_SERVER_EXAMPLE_BLE_PROCESS_H_ |
mbed_official | 14:de95c96e3305 | 18 | #define GATT_SERVER_EXAMPLE_BLE_PROCESS_H_ |
mbed_official | 14:de95c96e3305 | 19 | |
mbed_official | 14:de95c96e3305 | 20 | #include <stdint.h> |
mbed_official | 14:de95c96e3305 | 21 | #include <stdio.h> |
mbed_official | 14:de95c96e3305 | 22 | |
mbed_official | 14:de95c96e3305 | 23 | #include "events/EventQueue.h" |
mbed_official | 14:de95c96e3305 | 24 | #include "platform/Callback.h" |
mbed_official | 14:de95c96e3305 | 25 | #include "platform/NonCopyable.h" |
mbed_official | 14:de95c96e3305 | 26 | |
mbed_official | 14:de95c96e3305 | 27 | #include "ble/BLE.h" |
mbed_official | 14:de95c96e3305 | 28 | #include "ble/Gap.h" |
mbed_official | 14:de95c96e3305 | 29 | #include "ble/GapAdvertisingParams.h" |
mbed_official | 14:de95c96e3305 | 30 | #include "ble/GapAdvertisingData.h" |
mbed_official | 14:de95c96e3305 | 31 | #include "ble/FunctionPointerWithContext.h" |
mbed_official | 14:de95c96e3305 | 32 | |
mbed_official | 14:de95c96e3305 | 33 | /** |
mbed_official | 14:de95c96e3305 | 34 | * Handle initialization adn shutdown of the BLE Instance. |
mbed_official | 14:de95c96e3305 | 35 | * |
mbed_official | 14:de95c96e3305 | 36 | * Setup advertising payload and manage advertising state. |
mbed_official | 14:de95c96e3305 | 37 | * Delegate to GattClientProcess once the connection is established. |
mbed_official | 14:de95c96e3305 | 38 | */ |
mbed_official | 14:de95c96e3305 | 39 | class BLEProcess : private mbed::NonCopyable<BLEProcess> { |
mbed_official | 14:de95c96e3305 | 40 | public: |
mbed_official | 14:de95c96e3305 | 41 | /** |
mbed_official | 14:de95c96e3305 | 42 | * Construct a BLEProcess from an event queue and a ble interface. |
mbed_official | 14:de95c96e3305 | 43 | * |
mbed_official | 14:de95c96e3305 | 44 | * Call start() to initiate ble processing. |
mbed_official | 14:de95c96e3305 | 45 | */ |
mbed_official | 14:de95c96e3305 | 46 | BLEProcess(events::EventQueue &event_queue, BLE &ble_interface) : |
mbed_official | 14:de95c96e3305 | 47 | _event_queue(event_queue), |
mbed_official | 14:de95c96e3305 | 48 | _ble_interface(ble_interface), |
mbed_official | 14:de95c96e3305 | 49 | _post_init_cb() { |
mbed_official | 14:de95c96e3305 | 50 | } |
mbed_official | 14:de95c96e3305 | 51 | |
mbed_official | 14:de95c96e3305 | 52 | ~BLEProcess() |
mbed_official | 14:de95c96e3305 | 53 | { |
mbed_official | 14:de95c96e3305 | 54 | stop(); |
mbed_official | 14:de95c96e3305 | 55 | } |
mbed_official | 14:de95c96e3305 | 56 | |
mbed_official | 14:de95c96e3305 | 57 | /** |
mbed_official | 14:de95c96e3305 | 58 | * Subscription to the ble interface initialization event. |
mbed_official | 14:de95c96e3305 | 59 | * |
mbed_official | 14:de95c96e3305 | 60 | * @param[in] cb The callback object that will be called when the ble |
mbed_official | 14:de95c96e3305 | 61 | * interface is initialized. |
mbed_official | 14:de95c96e3305 | 62 | */ |
mbed_official | 14:de95c96e3305 | 63 | void on_init(mbed::Callback<void(BLE&, events::EventQueue&)> cb) |
mbed_official | 14:de95c96e3305 | 64 | { |
mbed_official | 14:de95c96e3305 | 65 | _post_init_cb = cb; |
mbed_official | 14:de95c96e3305 | 66 | } |
mbed_official | 14:de95c96e3305 | 67 | |
mbed_official | 14:de95c96e3305 | 68 | /** |
mbed_official | 14:de95c96e3305 | 69 | * Initialize the ble interface, configure it and start advertising. |
mbed_official | 14:de95c96e3305 | 70 | */ |
mbed_official | 14:de95c96e3305 | 71 | bool start() |
mbed_official | 14:de95c96e3305 | 72 | { |
mbed_official | 14:de95c96e3305 | 73 | printf("Ble process started.\r\n"); |
mbed_official | 14:de95c96e3305 | 74 | |
mbed_official | 14:de95c96e3305 | 75 | if (_ble_interface.hasInitialized()) { |
mbed_official | 14:de95c96e3305 | 76 | printf("Error: the ble instance has already been initialized.\r\n"); |
mbed_official | 14:de95c96e3305 | 77 | return false; |
mbed_official | 14:de95c96e3305 | 78 | } |
mbed_official | 14:de95c96e3305 | 79 | |
mbed_official | 14:de95c96e3305 | 80 | _ble_interface.onEventsToProcess( |
mbed_official | 14:de95c96e3305 | 81 | makeFunctionPointer(this, &BLEProcess::schedule_ble_events) |
mbed_official | 14:de95c96e3305 | 82 | ); |
mbed_official | 14:de95c96e3305 | 83 | |
mbed_official | 14:de95c96e3305 | 84 | ble_error_t error = _ble_interface.init( |
mbed_official | 14:de95c96e3305 | 85 | this, &BLEProcess::when_init_complete |
mbed_official | 14:de95c96e3305 | 86 | ); |
mbed_official | 14:de95c96e3305 | 87 | |
mbed_official | 14:de95c96e3305 | 88 | if (error) { |
mbed_official | 14:de95c96e3305 | 89 | printf("Error: %u returned by BLE::init.\r\n", error); |
mbed_official | 14:de95c96e3305 | 90 | return false; |
mbed_official | 14:de95c96e3305 | 91 | } |
mbed_official | 14:de95c96e3305 | 92 | |
mbed_official | 14:de95c96e3305 | 93 | return true; |
mbed_official | 14:de95c96e3305 | 94 | } |
mbed_official | 14:de95c96e3305 | 95 | |
mbed_official | 14:de95c96e3305 | 96 | /** |
mbed_official | 14:de95c96e3305 | 97 | * Close existing connections and stop the process. |
mbed_official | 14:de95c96e3305 | 98 | */ |
mbed_official | 14:de95c96e3305 | 99 | void stop() |
mbed_official | 14:de95c96e3305 | 100 | { |
mbed_official | 14:de95c96e3305 | 101 | if (_ble_interface.hasInitialized()) { |
mbed_official | 14:de95c96e3305 | 102 | _ble_interface.shutdown(); |
mbed_official | 14:de95c96e3305 | 103 | printf("Ble process stopped."); |
mbed_official | 14:de95c96e3305 | 104 | } |
mbed_official | 14:de95c96e3305 | 105 | } |
mbed_official | 14:de95c96e3305 | 106 | |
mbed_official | 14:de95c96e3305 | 107 | private: |
mbed_official | 14:de95c96e3305 | 108 | |
mbed_official | 14:de95c96e3305 | 109 | /** |
mbed_official | 14:de95c96e3305 | 110 | * Schedule processing of events from the BLE middleware in the event queue. |
mbed_official | 14:de95c96e3305 | 111 | */ |
mbed_official | 14:de95c96e3305 | 112 | void schedule_ble_events(BLE::OnEventsToProcessCallbackContext *event) |
mbed_official | 14:de95c96e3305 | 113 | { |
mbed_official | 14:de95c96e3305 | 114 | _event_queue.call(mbed::callback(&event->ble, &BLE::processEvents)); |
mbed_official | 14:de95c96e3305 | 115 | } |
mbed_official | 14:de95c96e3305 | 116 | |
mbed_official | 14:de95c96e3305 | 117 | /** |
mbed_official | 14:de95c96e3305 | 118 | * Sets up adverting payload and start advertising. |
mbed_official | 14:de95c96e3305 | 119 | * |
mbed_official | 14:de95c96e3305 | 120 | * This function is invoked when the ble interface is initialized. |
mbed_official | 14:de95c96e3305 | 121 | */ |
mbed_official | 14:de95c96e3305 | 122 | void when_init_complete(BLE::InitializationCompleteCallbackContext *event) |
mbed_official | 14:de95c96e3305 | 123 | { |
mbed_official | 14:de95c96e3305 | 124 | if (event->error) { |
mbed_official | 14:de95c96e3305 | 125 | printf("Error %u during the initialization\r\n", event->error); |
mbed_official | 14:de95c96e3305 | 126 | return; |
mbed_official | 14:de95c96e3305 | 127 | } |
mbed_official | 14:de95c96e3305 | 128 | printf("Ble instance initialized\r\n"); |
mbed_official | 14:de95c96e3305 | 129 | |
mbed_official | 14:de95c96e3305 | 130 | Gap &gap = _ble_interface.gap(); |
mbed_official | 19:622c672f6d5f | 131 | gap.onConnection(this, &BLEProcess::when_connection); |
mbed_official | 19:622c672f6d5f | 132 | gap.onDisconnection(this, &BLEProcess::when_disconnection); |
mbed_official | 19:622c672f6d5f | 133 | |
mbed_official | 19:622c672f6d5f | 134 | if (!set_advertising_parameters()) { |
mbed_official | 14:de95c96e3305 | 135 | return; |
mbed_official | 14:de95c96e3305 | 136 | } |
mbed_official | 14:de95c96e3305 | 137 | |
mbed_official | 19:622c672f6d5f | 138 | if (!set_advertising_data()) { |
mbed_official | 19:622c672f6d5f | 139 | return; |
mbed_official | 19:622c672f6d5f | 140 | } |
mbed_official | 14:de95c96e3305 | 141 | |
mbed_official | 19:622c672f6d5f | 142 | if (!start_advertising()) { |
mbed_official | 19:622c672f6d5f | 143 | return; |
mbed_official | 19:622c672f6d5f | 144 | } |
mbed_official | 14:de95c96e3305 | 145 | |
mbed_official | 19:622c672f6d5f | 146 | if (_post_init_cb) { |
mbed_official | 14:de95c96e3305 | 147 | _post_init_cb(_ble_interface, _event_queue); |
mbed_official | 14:de95c96e3305 | 148 | } |
mbed_official | 14:de95c96e3305 | 149 | } |
mbed_official | 14:de95c96e3305 | 150 | |
mbed_official | 14:de95c96e3305 | 151 | void when_connection(const Gap::ConnectionCallbackParams_t *connection_event) |
mbed_official | 14:de95c96e3305 | 152 | { |
mbed_official | 14:de95c96e3305 | 153 | printf("Connected.\r\n"); |
mbed_official | 14:de95c96e3305 | 154 | } |
mbed_official | 14:de95c96e3305 | 155 | |
mbed_official | 14:de95c96e3305 | 156 | void when_disconnection(const Gap::DisconnectionCallbackParams_t *event) |
mbed_official | 14:de95c96e3305 | 157 | { |
mbed_official | 14:de95c96e3305 | 158 | printf("Disconnected.\r\n"); |
mbed_official | 14:de95c96e3305 | 159 | start_advertising(); |
mbed_official | 14:de95c96e3305 | 160 | } |
mbed_official | 14:de95c96e3305 | 161 | |
mbed_official | 19:622c672f6d5f | 162 | bool start_advertising(void) |
mbed_official | 14:de95c96e3305 | 163 | { |
mbed_official | 19:622c672f6d5f | 164 | Gap &gap = _ble_interface.gap(); |
mbed_official | 19:622c672f6d5f | 165 | |
mbed_official | 19:622c672f6d5f | 166 | /* Start advertising the set */ |
mbed_official | 19:622c672f6d5f | 167 | ble_error_t error = gap.startAdvertising(ble::LEGACY_ADVERTISING_HANDLE); |
mbed_official | 19:622c672f6d5f | 168 | |
mbed_official | 14:de95c96e3305 | 169 | if (error) { |
mbed_official | 14:de95c96e3305 | 170 | printf("Error %u during gap.startAdvertising.\r\n", error); |
mbed_official | 19:622c672f6d5f | 171 | return false; |
mbed_official | 14:de95c96e3305 | 172 | } else { |
mbed_official | 14:de95c96e3305 | 173 | printf("Advertising started.\r\n"); |
mbed_official | 19:622c672f6d5f | 174 | return true; |
mbed_official | 14:de95c96e3305 | 175 | } |
mbed_official | 14:de95c96e3305 | 176 | } |
mbed_official | 14:de95c96e3305 | 177 | |
mbed_official | 19:622c672f6d5f | 178 | bool set_advertising_parameters() |
mbed_official | 14:de95c96e3305 | 179 | { |
mbed_official | 19:622c672f6d5f | 180 | Gap &gap = _ble_interface.gap(); |
mbed_official | 14:de95c96e3305 | 181 | |
mbed_official | 19:622c672f6d5f | 182 | ble_error_t error = gap.setAdvertisingParameters( |
mbed_official | 19:622c672f6d5f | 183 | ble::LEGACY_ADVERTISING_HANDLE, |
mbed_official | 19:622c672f6d5f | 184 | ble::AdvertisingParameters() |
mbed_official | 14:de95c96e3305 | 185 | ); |
mbed_official | 14:de95c96e3305 | 186 | |
mbed_official | 19:622c672f6d5f | 187 | if (error) { |
mbed_official | 19:622c672f6d5f | 188 | printf("Gap::setAdvertisingParameters() failed with error %d", error); |
mbed_official | 19:622c672f6d5f | 189 | return false; |
mbed_official | 19:622c672f6d5f | 190 | } |
mbed_official | 19:622c672f6d5f | 191 | |
mbed_official | 19:622c672f6d5f | 192 | return true; |
mbed_official | 19:622c672f6d5f | 193 | } |
mbed_official | 19:622c672f6d5f | 194 | |
mbed_official | 19:622c672f6d5f | 195 | bool set_advertising_data() |
mbed_official | 19:622c672f6d5f | 196 | { |
mbed_official | 19:622c672f6d5f | 197 | Gap &gap = _ble_interface.gap(); |
mbed_official | 19:622c672f6d5f | 198 | |
mbed_official | 19:622c672f6d5f | 199 | /* Use the simple builder to construct the payload; it fails at runtime |
mbed_official | 19:622c672f6d5f | 200 | * if there is not enough space left in the buffer */ |
mbed_official | 19:622c672f6d5f | 201 | ble_error_t error = gap.setAdvertisingPayload( |
mbed_official | 19:622c672f6d5f | 202 | ble::LEGACY_ADVERTISING_HANDLE, |
mbed_official | 19:622c672f6d5f | 203 | ble::AdvertisingDataSimpleBuilder<ble::LEGACY_ADVERTISING_MAX_SIZE>() |
mbed_official | 19:622c672f6d5f | 204 | .setFlags() |
mbed_official | 19:622c672f6d5f | 205 | .setName("GattServer") |
mbed_official | 19:622c672f6d5f | 206 | .getAdvertisingData() |
mbed_official | 14:de95c96e3305 | 207 | ); |
mbed_official | 14:de95c96e3305 | 208 | |
mbed_official | 19:622c672f6d5f | 209 | if (error) { |
mbed_official | 19:622c672f6d5f | 210 | printf("Gap::setAdvertisingPayload() failed with error %d", error); |
mbed_official | 19:622c672f6d5f | 211 | return false; |
mbed_official | 19:622c672f6d5f | 212 | } |
mbed_official | 14:de95c96e3305 | 213 | |
mbed_official | 19:622c672f6d5f | 214 | return true; |
mbed_official | 14:de95c96e3305 | 215 | } |
mbed_official | 14:de95c96e3305 | 216 | |
mbed_official | 14:de95c96e3305 | 217 | events::EventQueue &_event_queue; |
mbed_official | 14:de95c96e3305 | 218 | BLE &_ble_interface; |
mbed_official | 14:de95c96e3305 | 219 | mbed::Callback<void(BLE&, events::EventQueue&)> _post_init_cb; |
mbed_official | 14:de95c96e3305 | 220 | }; |
mbed_official | 14:de95c96e3305 | 221 | |
mbed_official | 14:de95c96e3305 | 222 | #endif /* GATT_SERVER_EXAMPLE_BLE_PROCESS_H_ */ |