Lancaster University / BLE_API

Lancaster University's fork of the mbed BLE API. Lives on github, https://github.com/lancaster-university/BLE_API

Dependents:   microbit-dal microbit-dal microbit-ble-open microbit-dal ... more

Fork of BLE_API by Bluetooth Low Energy

ble/services/LinkLossService.h@727:1a1f5c5aedfe, 2015-07-06 (annotated)

Committer:
rgrover1
Date:
Mon Jul 06 10:10:34 2015 +0100
Revision:
727:1a1f5c5aedfe
Parent:
726:6884e374e2eb
Child:
728:997ba5e7b3b6
Synchronized with git rev 854fd111

Author: James Crosby

use mbed-classic to build (this will probably be a target-dependendency in the future)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 712:b04b5db36865 1 /* mbed Microcontroller Library
rgrover1 712:b04b5db36865 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 712:b04b5db36865 3 *
rgrover1 712:b04b5db36865 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 712:b04b5db36865 5 * you may not use this file except in compliance with the License.
rgrover1 712:b04b5db36865 6 * You may obtain a copy of the License at
rgrover1 712:b04b5db36865 7 *
rgrover1 712:b04b5db36865 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 712:b04b5db36865 9 *
rgrover1 712:b04b5db36865 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 712:b04b5db36865 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 712:b04b5db36865 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 712:b04b5db36865 13 * See the License for the specific language governing permissions and
rgrover1 712:b04b5db36865 14 * limitations under the License.
rgrover1 712:b04b5db36865 15 */
rgrover1 712:b04b5db36865 16
rgrover1 712:b04b5db36865 17 #ifndef __BLE_LINK_LOSS_SERVICE_H__
rgrover1 712:b04b5db36865 18 #define __BLE_LINK_LOSS_SERVICE_H__
rgrover1 712:b04b5db36865 19
rgrover1 712:b04b5db36865 20 #include "Gap.h"
rgrover1 712:b04b5db36865 21
rgrover1 712:b04b5db36865 22 /**
rgrover1 712:b04b5db36865 23 * @class LinkLossService
rgrover1 712:b04b5db36865 24 * @brief This service defines behavior when a link is lost between two devices. <br>
rgrover1 712:b04b5db36865 25 * Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.link_loss.xml <br>
rgrover1 712:b04b5db36865 26 * Alertness Level Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.alert_level.xml <br>
rgrover1 712:b04b5db36865 27 */
rgrover1 712:b04b5db36865 28 class LinkLossService {
rgrover1 712:b04b5db36865 29 public:
rgrover1 712:b04b5db36865 30 enum AlertLevel_t {
rgrover1 712:b04b5db36865 31 NO_ALERT = 0,
rgrover1 712:b04b5db36865 32 MILD_ALERT = 1,
rgrover1 712:b04b5db36865 33 HIGH_ALERT = 2
rgrover1 712:b04b5db36865 34 };
rgrover1 712:b04b5db36865 35
rgrover1 712:b04b5db36865 36 typedef void (* callback_t)(AlertLevel_t level);
rgrover1 712:b04b5db36865 37
rgrover1 712:b04b5db36865 38 /**
rgrover1 712:b04b5db36865 39 * @param[ref] ble
rgrover1 712:b04b5db36865 40 * BLE object for the underlying controller.
rgrover1 712:b04b5db36865 41 */
rgrover1 712:b04b5db36865 42 LinkLossService(BLE &bleIn, callback_t callbackIn, AlertLevel_t levelIn = NO_ALERT) :
rgrover1 712:b04b5db36865 43 ble(bleIn),
rgrover1 712:b04b5db36865 44 alertLevel(levelIn),
rgrover1 712:b04b5db36865 45 callback(callbackIn),
rgrover1 712:b04b5db36865 46 alertLevelChar(GattCharacteristic::UUID_ALERT_LEVEL_CHAR, reinterpret_cast<uint8_t *>(&alertLevel)) {
rgrover1 712:b04b5db36865 47 static bool serviceAdded = false; /* We should only ever add one LinkLoss service. */
rgrover1 712:b04b5db36865 48 if (serviceAdded) {
rgrover1 712:b04b5db36865 49 return;
rgrover1 712:b04b5db36865 50 }
rgrover1 712:b04b5db36865 51
rgrover1 712:b04b5db36865 52 GattCharacteristic *charTable[] = {&alertLevelChar};
rgrover1 712:b04b5db36865 53 GattService linkLossService(GattService::UUID_LINK_LOSS_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
rgrover1 712:b04b5db36865 54
rgrover1 712:b04b5db36865 55 ble.addService(linkLossService);
rgrover1 712:b04b5db36865 56 serviceAdded = true;
rgrover1 712:b04b5db36865 57
rgrover1 712:b04b5db36865 58 ble.addToDisconnectionCallChain(this, &LinkLossService::onDisconnectionFilter);
rgrover1 712:b04b5db36865 59 ble.onDataWritten(this, &LinkLossService::onDataWritten);
rgrover1 712:b04b5db36865 60 }
rgrover1 712:b04b5db36865 61
rgrover1 712:b04b5db36865 62 /**
rgrover1 712:b04b5db36865 63 * Update the callback.
rgrover1 712:b04b5db36865 64 */
rgrover1 712:b04b5db36865 65 void setCallback(callback_t newCallback) {
rgrover1 712:b04b5db36865 66 callback = newCallback;
rgrover1 712:b04b5db36865 67 }
rgrover1 712:b04b5db36865 68
rgrover1 712:b04b5db36865 69 /**
rgrover1 712:b04b5db36865 70 * Update Alertness Level.
rgrover1 712:b04b5db36865 71 */
rgrover1 712:b04b5db36865 72 void setAlertLevel(AlertLevel_t newLevel) {
rgrover1 712:b04b5db36865 73 alertLevel = newLevel;
rgrover1 712:b04b5db36865 74 }
rgrover1 712:b04b5db36865 75
rgrover1 727:1a1f5c5aedfe 76 private:
rgrover1 712:b04b5db36865 77 /**
rgrover1 712:b04b5db36865 78 * This callback allows receiving updates to the AlertLevel Characteristic.
rgrover1 712:b04b5db36865 79 *
rgrover1 712:b04b5db36865 80 * @param[in] params
rgrover1 712:b04b5db36865 81 * Information about the characterisitc being updated.
rgrover1 712:b04b5db36865 82 */
rgrover1 712:b04b5db36865 83 virtual void onDataWritten(const GattWriteCallbackParams *params) {
rgrover1 727:1a1f5c5aedfe 84 if (params->charHandle == alertLevelChar.getValueHandle()) {
rgrover1 712:b04b5db36865 85 alertLevel = *reinterpret_cast<const AlertLevel_t *>(params->data);
rgrover1 712:b04b5db36865 86 }
rgrover1 712:b04b5db36865 87 }
rgrover1 712:b04b5db36865 88
rgrover1 712:b04b5db36865 89 void onDisconnectionFilter(void) {
rgrover1 712:b04b5db36865 90 if (alertLevel != NO_ALERT) {
rgrover1 712:b04b5db36865 91 callback(alertLevel);
rgrover1 712:b04b5db36865 92 }
rgrover1 712:b04b5db36865 93 }
rgrover1 712:b04b5db36865 94
rgrover1 712:b04b5db36865 95 protected:
rgrover1 712:b04b5db36865 96 BLE &ble;
rgrover1 712:b04b5db36865 97 AlertLevel_t alertLevel;
rgrover1 712:b04b5db36865 98 callback_t callback;
rgrover1 712:b04b5db36865 99
rgrover1 712:b04b5db36865 100 ReadWriteGattCharacteristic<uint8_t> alertLevelChar;
rgrover1 712:b04b5db36865 101 };
rgrover1 712:b04b5db36865 102
rgrover1 712:b04b5db36865 103 #endif /* __BLE_LINK_LOSS_SERVICE_H__ */