ST / Mbed OS mbed-os-example-ble-BatteryLevel

BLE BatteryLevel example

This example is a fork of the following mbed-os example:

https://developer.mbed.org/teams/mbed-os-examples/code/mbed-os-example-ble-BatteryLevel/

Please read the documentation in this page.

source/main.cpp@40:4ee97a41bc55, 2017-07-26 (annotated)

Committer:
bcostm
Date:
Wed Jul 26 09:21:48 2017 +0200
Revision:
40:4ee97a41bc55
Parent:
29:7a6aff8c9468 
Add DISCO_L475VG_IOT01A in mbed_app.json

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 4:52bffaff7f0b 22
mbed_official 4:52bffaff7f0b 23 DigitalOut led1(LED1, 1);
mbed_official 4:52bffaff7f0b 24
mbed_official 4:52bffaff7f0b 25 const static char DEVICE_NAME[] = "BATTERY";
mbed_official 4:52bffaff7f0b 26 static const uint16_t uuid16_list[] = {GattService::UUID_BATTERY_SERVICE};
mbed_official 4:52bffaff7f0b 27
mbed_official 4:52bffaff7f0b 28 static uint8_t batteryLevel = 50;
mbed_official 4:52bffaff7f0b 29 static BatteryService* batteryServicePtr;
mbed_official 4:52bffaff7f0b 30
mbed_official 29:7a6aff8c9468 31 static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
mbed_official 4:52bffaff7f0b 32
mbed_official 4:52bffaff7f0b 33 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
mbed_official 4:52bffaff7f0b 34 {
mbed_official 4:52bffaff7f0b 35 BLE::Instance().gap().startAdvertising();
mbed_official 4:52bffaff7f0b 36 }
mbed_official 4:52bffaff7f0b 37
mbed_official 4:52bffaff7f0b 38 void updateSensorValue() {
mbed_official 4:52bffaff7f0b 39 batteryLevel++;
mbed_official 4:52bffaff7f0b 40 if (batteryLevel > 100) {
mbed_official 4:52bffaff7f0b 41 batteryLevel = 20;
mbed_official 4:52bffaff7f0b 42 }
mbed_official 4:52bffaff7f0b 43
mbed_official 4:52bffaff7f0b 44 batteryServicePtr->updateBatteryLevel(batteryLevel);
mbed_official 4:52bffaff7f0b 45 }
mbed_official 4:52bffaff7f0b 46
mbed_official 4:52bffaff7f0b 47 void blinkCallback(void)
mbed_official 4:52bffaff7f0b 48 {
mbed_official 4:52bffaff7f0b 49 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
mbed_official 4:52bffaff7f0b 50
mbed_official 4:52bffaff7f0b 51 BLE &ble = BLE::Instance();
mbed_official 4:52bffaff7f0b 52 if (ble.gap().getState().connected) {
mbed_official 13:eaa1343657a8 53 eventQueue.call(updateSensorValue);
mbed_official 4:52bffaff7f0b 54 }
mbed_official 4:52bffaff7f0b 55 }
mbed_official 4:52bffaff7f0b 56
mbed_official 4:52bffaff7f0b 57 /**
mbed_official 4:52bffaff7f0b 58 * This function is called when the ble initialization process has failled
mbed_official 4:52bffaff7f0b 59 */
mbed_official 4:52bffaff7f0b 60 void onBleInitError(BLE &ble, ble_error_t error)
mbed_official 4:52bffaff7f0b 61 {
mbed_official 4:52bffaff7f0b 62 /* Initialization error handling should go here */
mbed_official 4:52bffaff7f0b 63 }
mbed_official 4:52bffaff7f0b 64
mbed_official 4:52bffaff7f0b 65 /**
mbed_official 4:52bffaff7f0b 66 * Callback triggered when the ble initialization process has finished
mbed_official 4:52bffaff7f0b 67 */
mbed_official 4:52bffaff7f0b 68 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
mbed_official 4:52bffaff7f0b 69 {
mbed_official 4:52bffaff7f0b 70 BLE& ble = params->ble;
mbed_official 4:52bffaff7f0b 71 ble_error_t error = params->error;
mbed_official 4:52bffaff7f0b 72
mbed_official 4:52bffaff7f0b 73 if (error != BLE_ERROR_NONE) {
mbed_official 4:52bffaff7f0b 74 /* In case of error, forward the error handling to onBleInitError */
mbed_official 4:52bffaff7f0b 75 onBleInitError(ble, error);
mbed_official 4:52bffaff7f0b 76 return;
mbed_official 4:52bffaff7f0b 77 }
mbed_official 4:52bffaff7f0b 78
mbed_official 4:52bffaff7f0b 79 /* Ensure that it is the default instance of BLE */
mbed_official 4:52bffaff7f0b 80 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
mbed_official 4:52bffaff7f0b 81 return;
mbed_official 4:52bffaff7f0b 82 }
mbed_official 4:52bffaff7f0b 83
mbed_official 4:52bffaff7f0b 84 ble.gap().onDisconnection(disconnectionCallback);
mbed_official 4:52bffaff7f0b 85
mbed_official 4:52bffaff7f0b 86 /* Setup primary service */
mbed_official 4:52bffaff7f0b 87 batteryServicePtr = new BatteryService(ble, batteryLevel);
mbed_official 4:52bffaff7f0b 88
mbed_official 4:52bffaff7f0b 89 /* Setup advertising */
mbed_official 4:52bffaff7f0b 90 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
mbed_official 4:52bffaff7f0b 91 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *) uuid16_list, sizeof(uuid16_list));
mbed_official 4:52bffaff7f0b 92 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *) DEVICE_NAME, sizeof(DEVICE_NAME));
mbed_official 4:52bffaff7f0b 93 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
mbed_official 4:52bffaff7f0b 94 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
mbed_official 4:52bffaff7f0b 95 ble.gap().startAdvertising();
mbed_official 4:52bffaff7f0b 96 }
mbed_official 4:52bffaff7f0b 97
mbed_official 4:52bffaff7f0b 98 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
mbed_official 4:52bffaff7f0b 99 BLE &ble = BLE::Instance();
mbed_official 13:eaa1343657a8 100 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
mbed_official 4:52bffaff7f0b 101 }
mbed_official 4:52bffaff7f0b 102
mbed_official 4:52bffaff7f0b 103 int main()
mbed_official 4:52bffaff7f0b 104 {
mbed_official 13:eaa1343657a8 105 eventQueue.call_every(500, blinkCallback);
mbed_official 4:52bffaff7f0b 106
mbed_official 4:52bffaff7f0b 107 BLE &ble = BLE::Instance();
mbed_official 4:52bffaff7f0b 108 ble.onEventsToProcess(scheduleBleEventsProcessing);
mbed_official 4:52bffaff7f0b 109 ble.init(bleInitComplete);
mbed_official 4:52bffaff7f0b 110
mbed_official 13:eaa1343657a8 111 eventQueue.dispatch_forever();
mbed_official 4:52bffaff7f0b 112
mbed_official 4:52bffaff7f0b 113 return 0;
mbed_official 4:52bffaff7f0b 114 }