Desmond Chen / Mbed OS mbed-os-example-ble-BatteryLevel_copy_copy

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source/main.cpp@76:e489712bcbcf, 2019-01-14 (annotated)

Committer:
mbed_official
Date:
Mon Jan 14 10:45:14 2019 +0000
Revision:
76:e489712bcbcf
Parent:
46:6b66d08f304e 
Merge pull request #208 from ARMmbed/mbed-os-5.11.0-oob



Mbed OS 5.11.0

.

Commit copied from https://github.com/ARMmbed/mbed-os-example-ble

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 4:52bffaff7f0b 1 /* mbed Microcontroller Library
mbed_official 4:52bffaff7f0b 2 * Copyright (c) 2006-2014 ARM Limited
mbed_official 4:52bffaff7f0b 3 *
mbed_official 4:52bffaff7f0b 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 4:52bffaff7f0b 5 * you may not use this file except in compliance with the License.
mbed_official 4:52bffaff7f0b 6 * You may obtain a copy of the License at
mbed_official 4:52bffaff7f0b 7 *
mbed_official 4:52bffaff7f0b 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 4:52bffaff7f0b 9 *
mbed_official 4:52bffaff7f0b 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 4:52bffaff7f0b 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 4:52bffaff7f0b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 4:52bffaff7f0b 13 * See the License for the specific language governing permissions and
mbed_official 4:52bffaff7f0b 14 * limitations under the License.
mbed_official 4:52bffaff7f0b 15 */
mbed_official 4:52bffaff7f0b 16
mbed_official 13:eaa1343657a8 17 #include <events/mbed_events.h>
mbed_official 4:52bffaff7f0b 18 #include <mbed.h>
mbed_official 4:52bffaff7f0b 19 #include "ble/BLE.h"
mbed_official 4:52bffaff7f0b 20 #include "ble/Gap.h"
mbed_official 4:52bffaff7f0b 21 #include "ble/services/BatteryService.h"
mbed_official 76:e489712bcbcf 22 #include "pretty_printer.h"
mbed_official 4:52bffaff7f0b 23
mbed_official 76:e489712bcbcf 24 static DigitalOut led1(LED1, 1);
mbed_official 76:e489712bcbcf 25
mbed_official 76:e489712bcbcf 26 const static char DEVICE_NAME[] = "BATTERY";
mbed_official 76:e489712bcbcf 27
mbed_official 76:e489712bcbcf 28 static events::EventQueue event_queue(/* event count */ 16 * EVENTS_EVENT_SIZE);
mbed_official 4:52bffaff7f0b 29
mbed_official 76:e489712bcbcf 30 class BatteryDemo : ble::Gap::EventHandler {
mbed_official 76:e489712bcbcf 31 public:
mbed_official 76:e489712bcbcf 32 BatteryDemo(BLE &ble, events::EventQueue &event_queue) :
mbed_official 76:e489712bcbcf 33 _ble(ble),
mbed_official 76:e489712bcbcf 34 _event_queue(event_queue),
mbed_official 76:e489712bcbcf 35 _battery_uuid(GattService::UUID_BATTERY_SERVICE),
mbed_official 76:e489712bcbcf 36 _battery_level(50),
mbed_official 76:e489712bcbcf 37 _battery_service(ble, _battery_level),
mbed_official 76:e489712bcbcf 38 _adv_data_builder(_adv_buffer) { }
mbed_official 4:52bffaff7f0b 39
mbed_official 76:e489712bcbcf 40 void start() {
mbed_official 76:e489712bcbcf 41 _ble.gap().setEventHandler(this);
mbed_official 76:e489712bcbcf 42
mbed_official 76:e489712bcbcf 43 _ble.init(this, &BatteryDemo::on_init_complete);
mbed_official 76:e489712bcbcf 44
mbed_official 76:e489712bcbcf 45 _event_queue.call_every(500, this, &BatteryDemo::blink);
mbed_official 76:e489712bcbcf 46 _event_queue.call_every(1000, this, &BatteryDemo::update_sensor_value);
mbed_official 76:e489712bcbcf 47
mbed_official 76:e489712bcbcf 48 _event_queue.dispatch_forever();
mbed_official 76:e489712bcbcf 49 }
mbed_official 4:52bffaff7f0b 50
mbed_official 76:e489712bcbcf 51 private:
mbed_official 76:e489712bcbcf 52 /** Callback triggered when the ble initialization process has finished */
mbed_official 76:e489712bcbcf 53 void on_init_complete(BLE::InitializationCompleteCallbackContext *params) {
mbed_official 76:e489712bcbcf 54 if (params->error != BLE_ERROR_NONE) {
mbed_official 76:e489712bcbcf 55 print_error(params->error, "Ble initialization failed.");
mbed_official 76:e489712bcbcf 56 return;
mbed_official 76:e489712bcbcf 57 }
mbed_official 4:52bffaff7f0b 58
mbed_official 76:e489712bcbcf 59 print_mac_address();
mbed_official 76:e489712bcbcf 60
mbed_official 76:e489712bcbcf 61 start_advertising();
mbed_official 4:52bffaff7f0b 62 }
mbed_official 4:52bffaff7f0b 63
mbed_official 76:e489712bcbcf 64 void start_advertising() {
mbed_official 76:e489712bcbcf 65 /* Create advertising parameters and payload */
mbed_official 4:52bffaff7f0b 66
mbed_official 76:e489712bcbcf 67 ble::AdvertisingParameters adv_parameters(
mbed_official 76:e489712bcbcf 68 ble::advertising_type_t::CONNECTABLE_UNDIRECTED,
mbed_official 76:e489712bcbcf 69 ble::adv_interval_t(ble::millisecond_t(1000))
mbed_official 76:e489712bcbcf 70 );
mbed_official 4:52bffaff7f0b 71
mbed_official 76:e489712bcbcf 72 _adv_data_builder.setFlags();
mbed_official 76:e489712bcbcf 73 _adv_data_builder.setLocalServiceList(mbed::make_Span(&_battery_uuid, 1));
mbed_official 76:e489712bcbcf 74 _adv_data_builder.setName(DEVICE_NAME);
mbed_official 4:52bffaff7f0b 75
mbed_official 76:e489712bcbcf 76 /* Setup advertising */
mbed_official 76:e489712bcbcf 77
mbed_official 76:e489712bcbcf 78 ble_error_t error = _ble.gap().setAdvertisingParameters(
mbed_official 76:e489712bcbcf 79 ble::LEGACY_ADVERTISING_HANDLE,
mbed_official 76:e489712bcbcf 80 adv_parameters
mbed_official 76:e489712bcbcf 81 );
mbed_official 4:52bffaff7f0b 82
mbed_official 76:e489712bcbcf 83 if (error) {
mbed_official 76:e489712bcbcf 84 print_error(error, "_ble.gap().setAdvertisingParameters() failed");
mbed_official 76:e489712bcbcf 85 return;
mbed_official 76:e489712bcbcf 86 }
mbed_official 76:e489712bcbcf 87
mbed_official 76:e489712bcbcf 88 error = _ble.gap().setAdvertisingPayload(
mbed_official 76:e489712bcbcf 89 ble::LEGACY_ADVERTISING_HANDLE,
mbed_official 76:e489712bcbcf 90 _adv_data_builder.getAdvertisingData()
mbed_official 76:e489712bcbcf 91 );
mbed_official 46:6b66d08f304e 92
mbed_official 76:e489712bcbcf 93 if (error) {
mbed_official 76:e489712bcbcf 94 print_error(error, "_ble.gap().setAdvertisingPayload() failed");
mbed_official 76:e489712bcbcf 95 return;
mbed_official 76:e489712bcbcf 96 }
mbed_official 76:e489712bcbcf 97
mbed_official 76:e489712bcbcf 98 /* Start advertising */
mbed_official 4:52bffaff7f0b 99
mbed_official 76:e489712bcbcf 100 error = _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
mbed_official 76:e489712bcbcf 101
mbed_official 76:e489712bcbcf 102 if (error) {
mbed_official 76:e489712bcbcf 103 print_error(error, "_ble.gap().startAdvertising() failed");
mbed_official 76:e489712bcbcf 104 return;
mbed_official 76:e489712bcbcf 105 }
mbed_official 4:52bffaff7f0b 106 }
mbed_official 4:52bffaff7f0b 107
mbed_official 76:e489712bcbcf 108 void update_sensor_value() {
mbed_official 76:e489712bcbcf 109 if (_ble.gap().getState().connected) {
mbed_official 76:e489712bcbcf 110 _battery_level++;
mbed_official 76:e489712bcbcf 111 if (_battery_level > 100) {
mbed_official 76:e489712bcbcf 112 _battery_level = 20;
mbed_official 76:e489712bcbcf 113 }
mbed_official 76:e489712bcbcf 114
mbed_official 76:e489712bcbcf 115 _battery_service.updateBatteryLevel(_battery_level);
mbed_official 76:e489712bcbcf 116 }
mbed_official 76:e489712bcbcf 117 }
mbed_official 76:e489712bcbcf 118
mbed_official 76:e489712bcbcf 119 void blink(void) {
mbed_official 76:e489712bcbcf 120 led1 = !led1;
mbed_official 4:52bffaff7f0b 121 }
mbed_official 4:52bffaff7f0b 122
mbed_official 76:e489712bcbcf 123 private:
mbed_official 76:e489712bcbcf 124 /* Event handler */
mbed_official 4:52bffaff7f0b 125
mbed_official 76:e489712bcbcf 126 void onDisconnectionComplete(const ble::DisconnectionCompleteEvent&) {
mbed_official 76:e489712bcbcf 127 _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
mbed_official 76:e489712bcbcf 128 }
mbed_official 76:e489712bcbcf 129
mbed_official 76:e489712bcbcf 130 private:
mbed_official 76:e489712bcbcf 131 BLE &_ble;
mbed_official 76:e489712bcbcf 132 events::EventQueue &_event_queue;
mbed_official 4:52bffaff7f0b 133
mbed_official 76:e489712bcbcf 134 UUID _battery_uuid;
mbed_official 76:e489712bcbcf 135
mbed_official 76:e489712bcbcf 136 uint8_t _battery_level;
mbed_official 76:e489712bcbcf 137 BatteryService _battery_service;
mbed_official 46:6b66d08f304e 138
mbed_official 76:e489712bcbcf 139 uint8_t _adv_buffer[ble::LEGACY_ADVERTISING_MAX_SIZE];
mbed_official 76:e489712bcbcf 140 ble::AdvertisingDataBuilder _adv_data_builder;
mbed_official 76:e489712bcbcf 141 };
mbed_official 4:52bffaff7f0b 142
mbed_official 76:e489712bcbcf 143 /** Schedule processing of events from the BLE middleware in the event queue. */
mbed_official 76:e489712bcbcf 144 void schedule_ble_events(BLE::OnEventsToProcessCallbackContext *context) {
mbed_official 76:e489712bcbcf 145 event_queue.call(Callback<void()>(&context->ble, &BLE::processEvents));
mbed_official 4:52bffaff7f0b 146 }
mbed_official 4:52bffaff7f0b 147
mbed_official 4:52bffaff7f0b 148 int main()
mbed_official 4:52bffaff7f0b 149 {
mbed_official 76:e489712bcbcf 150 BLE &ble = BLE::Instance();
mbed_official 76:e489712bcbcf 151 ble.onEventsToProcess(schedule_ble_events);
mbed_official 4:52bffaff7f0b 152
mbed_official 76:e489712bcbcf 153 BatteryDemo demo(ble, event_queue);
mbed_official 76:e489712bcbcf 154 demo.start();
mbed_official 4:52bffaff7f0b 155
mbed_official 4:52bffaff7f0b 156 return 0;
mbed_official 4:52bffaff7f0b 157 }