Delta / Mbed OS BLE_BatteryLevel_mbedOS5

This example creates and updates a standard Battery Level service containing a single GATT characteristic with mbed OS 5.

main.cpp@0:d9a87d1192f6, 2017-06-02 (annotated)

Committer:
tsungta
Date:
Fri Jun 02 14:29:32 2017 +0000
Revision:
0:d9a87d1192f6
First commit

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tsungta 0:d9a87d1192f6 1 /* mbed Microcontroller Library
tsungta 0:d9a87d1192f6 2 * Copyright (c) 2006-2014 ARM Limited
tsungta 0:d9a87d1192f6 3 *
tsungta 0:d9a87d1192f6 4 * Licensed under the Apache License, Version 2.0 (the "License");
tsungta 0:d9a87d1192f6 5 * you may not use this file except in compliance with the License.
tsungta 0:d9a87d1192f6 6 * You may obtain a copy of the License at
tsungta 0:d9a87d1192f6 7 *
tsungta 0:d9a87d1192f6 8 * http://www.apache.org/licenses/LICENSE-2.0
tsungta 0:d9a87d1192f6 9 *
tsungta 0:d9a87d1192f6 10 * Unless required by applicable law or agreed to in writing, software
tsungta 0:d9a87d1192f6 11 * distributed under the License is distributed on an "AS IS" BASIS,
tsungta 0:d9a87d1192f6 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tsungta 0:d9a87d1192f6 13 * See the License for the specific language governing permissions and
tsungta 0:d9a87d1192f6 14 * limitations under the License.
tsungta 0:d9a87d1192f6 15 */
tsungta 0:d9a87d1192f6 16
tsungta 0:d9a87d1192f6 17 #include <events/mbed_events.h>
tsungta 0:d9a87d1192f6 18 #include <mbed.h>
tsungta 0:d9a87d1192f6 19 #include "ble/BLE.h"
tsungta 0:d9a87d1192f6 20 #include "ble/Gap.h"
tsungta 0:d9a87d1192f6 21 #include "ble/services/BatteryService.h"
tsungta 0:d9a87d1192f6 22
tsungta 0:d9a87d1192f6 23 DigitalOut led1(LED1, 1);
tsungta 0:d9a87d1192f6 24
tsungta 0:d9a87d1192f6 25 const static char DEVICE_NAME[] = "BATTERY";
tsungta 0:d9a87d1192f6 26 static const uint16_t uuid16_list[] = {GattService::UUID_BATTERY_SERVICE};
tsungta 0:d9a87d1192f6 27
tsungta 0:d9a87d1192f6 28 static uint8_t batteryLevel = 50;
tsungta 0:d9a87d1192f6 29 static BatteryService* batteryServicePtr;
tsungta 0:d9a87d1192f6 30
tsungta 0:d9a87d1192f6 31 static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
tsungta 0:d9a87d1192f6 32
tsungta 0:d9a87d1192f6 33 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
tsungta 0:d9a87d1192f6 34 {
tsungta 0:d9a87d1192f6 35 BLE::Instance().gap().startAdvertising();
tsungta 0:d9a87d1192f6 36 }
tsungta 0:d9a87d1192f6 37
tsungta 0:d9a87d1192f6 38 void updateSensorValue() {
tsungta 0:d9a87d1192f6 39 batteryLevel++;
tsungta 0:d9a87d1192f6 40 if (batteryLevel > 100) {
tsungta 0:d9a87d1192f6 41 batteryLevel = 20;
tsungta 0:d9a87d1192f6 42 }
tsungta 0:d9a87d1192f6 43
tsungta 0:d9a87d1192f6 44 batteryServicePtr->updateBatteryLevel(batteryLevel);
tsungta 0:d9a87d1192f6 45 }
tsungta 0:d9a87d1192f6 46
tsungta 0:d9a87d1192f6 47 void blinkCallback(void)
tsungta 0:d9a87d1192f6 48 {
tsungta 0:d9a87d1192f6 49 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
tsungta 0:d9a87d1192f6 50
tsungta 0:d9a87d1192f6 51 BLE &ble = BLE::Instance();
tsungta 0:d9a87d1192f6 52 if (ble.gap().getState().connected) {
tsungta 0:d9a87d1192f6 53 eventQueue.call(updateSensorValue);
tsungta 0:d9a87d1192f6 54 }
tsungta 0:d9a87d1192f6 55 }
tsungta 0:d9a87d1192f6 56
tsungta 0:d9a87d1192f6 57 /**
tsungta 0:d9a87d1192f6 58 * This function is called when the ble initialization process has failled
tsungta 0:d9a87d1192f6 59 */
tsungta 0:d9a87d1192f6 60 void onBleInitError(BLE &ble, ble_error_t error)
tsungta 0:d9a87d1192f6 61 {
tsungta 0:d9a87d1192f6 62 /* Initialization error handling should go here */
tsungta 0:d9a87d1192f6 63 }
tsungta 0:d9a87d1192f6 64
tsungta 0:d9a87d1192f6 65 /**
tsungta 0:d9a87d1192f6 66 * Callback triggered when the ble initialization process has finished
tsungta 0:d9a87d1192f6 67 */
tsungta 0:d9a87d1192f6 68 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
tsungta 0:d9a87d1192f6 69 {
tsungta 0:d9a87d1192f6 70 BLE& ble = params->ble;
tsungta 0:d9a87d1192f6 71 ble_error_t error = params->error;
tsungta 0:d9a87d1192f6 72
tsungta 0:d9a87d1192f6 73 if (error != BLE_ERROR_NONE) {
tsungta 0:d9a87d1192f6 74 /* In case of error, forward the error handling to onBleInitError */
tsungta 0:d9a87d1192f6 75 onBleInitError(ble, error);
tsungta 0:d9a87d1192f6 76 return;
tsungta 0:d9a87d1192f6 77 }
tsungta 0:d9a87d1192f6 78
tsungta 0:d9a87d1192f6 79 /* Ensure that it is the default instance of BLE */
tsungta 0:d9a87d1192f6 80 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
tsungta 0:d9a87d1192f6 81 return;
tsungta 0:d9a87d1192f6 82 }
tsungta 0:d9a87d1192f6 83
tsungta 0:d9a87d1192f6 84 ble.gap().onDisconnection(disconnectionCallback);
tsungta 0:d9a87d1192f6 85
tsungta 0:d9a87d1192f6 86 /* Setup primary service */
tsungta 0:d9a87d1192f6 87 batteryServicePtr = new BatteryService(ble, batteryLevel);
tsungta 0:d9a87d1192f6 88
tsungta 0:d9a87d1192f6 89 /* Setup advertising */
tsungta 0:d9a87d1192f6 90 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
tsungta 0:d9a87d1192f6 91 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *) uuid16_list, sizeof(uuid16_list));
tsungta 0:d9a87d1192f6 92 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *) DEVICE_NAME, sizeof(DEVICE_NAME));
tsungta 0:d9a87d1192f6 93 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
tsungta 0:d9a87d1192f6 94 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
tsungta 0:d9a87d1192f6 95 ble.gap().startAdvertising();
tsungta 0:d9a87d1192f6 96 }
tsungta 0:d9a87d1192f6 97
tsungta 0:d9a87d1192f6 98 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
tsungta 0:d9a87d1192f6 99 BLE &ble = BLE::Instance();
tsungta 0:d9a87d1192f6 100 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
tsungta 0:d9a87d1192f6 101 }
tsungta 0:d9a87d1192f6 102
tsungta 0:d9a87d1192f6 103 int main()
tsungta 0:d9a87d1192f6 104 {
tsungta 0:d9a87d1192f6 105 eventQueue.call_every(500, blinkCallback);
tsungta 0:d9a87d1192f6 106
tsungta 0:d9a87d1192f6 107 BLE &ble = BLE::Instance();
tsungta 0:d9a87d1192f6 108 ble.onEventsToProcess(scheduleBleEventsProcessing);
tsungta 0:d9a87d1192f6 109 ble.init(bleInitComplete);
tsungta 0:d9a87d1192f6 110
tsungta 0:d9a87d1192f6 111 eventQueue.dispatch_forever();
tsungta 0:d9a87d1192f6 112
tsungta 0:d9a87d1192f6 113 return 0;
tsungta 0:d9a87d1192f6 114 }