Alex Cordonnier / BLE_API

High level Bluetooth Low Energy API and radio abstraction layer

Fork of BLE_API by Bluetooth Low Energy

public/ServiceDiscovery.h@482:a4c6ac278fd4, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:52:01 2015 +0100
Revision:
482:a4c6ac278fd4
Parent:
479:dbcb964cc288
Child:
487:07d4423e442b
Synchronized with git rev dc4ad0a9

Author: Rohit Grover

expand on the comment for ServiceDiscovery::launch

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 431:1c8c592430ec 1 /* mbed Microcontroller Library
rgrover1 431:1c8c592430ec 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 431:1c8c592430ec 3 *
rgrover1 431:1c8c592430ec 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 431:1c8c592430ec 5 * you may not use this file except in compliance with the License.
rgrover1 431:1c8c592430ec 6 * You may obtain a copy of the License at
rgrover1 431:1c8c592430ec 7 *
rgrover1 431:1c8c592430ec 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 431:1c8c592430ec 9 *
rgrover1 431:1c8c592430ec 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 431:1c8c592430ec 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 431:1c8c592430ec 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 431:1c8c592430ec 13 * See the License for the specific language governing permissions and
rgrover1 431:1c8c592430ec 14 * limitations under the License.
rgrover1 431:1c8c592430ec 15 */
rgrover1 431:1c8c592430ec 16
rgrover1 431:1c8c592430ec 17 #ifndef __SERVICE_DISOVERY_H__
rgrover1 431:1c8c592430ec 18 #define __SERVICE_DISOVERY_H__
rgrover1 431:1c8c592430ec 19
rgrover1 431:1c8c592430ec 20 #include "UUID.h"
rgrover1 431:1c8c592430ec 21 #include "Gap.h"
rgrover1 438:b55ce5f5715d 22 #include "GattAttribute.h"
rgrover1 470:150c2363f776 23 #include "DiscoveredService.h"
rgrover1 470:150c2363f776 24 #include "DiscoveredCharacteristic.h"
rgrover1 431:1c8c592430ec 25
rgrover1 431:1c8c592430ec 26 class ServiceDiscovery {
rgrover1 431:1c8c592430ec 27 public:
rgrover1 479:dbcb964cc288 28 /*
rgrover1 479:dbcb964cc288 29 * Exposed application callback types.
rgrover1 479:dbcb964cc288 30 */
rgrover1 478:230cd5e207ba 31 typedef void (*ServiceCallback_t)(const DiscoveredService *);
rgrover1 476:122bcbdadb56 32 typedef void (*CharacteristicCallback_t)(const DiscoveredCharacteristic *);
rgrover1 457:6ebc9bbde90b 33 typedef void (*TerminationCallback_t)(Gap::Handle_t connectionHandle);
rgrover1 431:1c8c592430ec 34
rgrover1 431:1c8c592430ec 35 public:
rgrover1 479:dbcb964cc288 36 /**
rgrover1 479:dbcb964cc288 37 * Launch service discovery. Once launched, service discovery will remain
rgrover1 479:dbcb964cc288 38 * active with callbacks being issued back into the application for matching
rgrover1 479:dbcb964cc288 39 * services/characteristics. isActive() can be used to determine status; and
rgrover1 479:dbcb964cc288 40 * a termination callback (if setup) will be invoked at the end. Service
rgrover1 479:dbcb964cc288 41 * discovery can be terminated prematurely if needed using terminate().
rgrover1 479:dbcb964cc288 42 *
rgrover1 479:dbcb964cc288 43 * @param connectionHandle
rgrover1 479:dbcb964cc288 44 * Handle for the connection with the peer.
rgrover1 479:dbcb964cc288 45 * @param sc
rgrover1 479:dbcb964cc288 46 * This is the application callback for matching service. Taken as
rgrover1 479:dbcb964cc288 47 * NULL by default. Note: service discovery may still be active
rgrover1 479:dbcb964cc288 48 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 479:dbcb964cc288 49 * APIs from within this application callback might cause the
rgrover1 479:dbcb964cc288 50 * stack to abort service discovery. If this becomes an issue, it
rgrover1 479:dbcb964cc288 51 * may be better to make local copy of the discoveredService and
rgrover1 479:dbcb964cc288 52 * wait for service discovery to terminate before operating on the
rgrover1 479:dbcb964cc288 53 * service.
rgrover1 479:dbcb964cc288 54 * @param cc
rgrover1 479:dbcb964cc288 55 * This is the application callback for matching characteristic.
rgrover1 479:dbcb964cc288 56 * Taken as NULL by default. Note: service discovery may still be
rgrover1 479:dbcb964cc288 57 * active when this callback is issued; calling asynchronous
rgrover1 479:dbcb964cc288 58 * BLE-stack APIs from within this application callback might cause
rgrover1 479:dbcb964cc288 59 * the stack to abort service discovery. If this becomes an issue,
rgrover1 479:dbcb964cc288 60 * it may be better to make local copy of the discoveredCharacteristic
rgrover1 479:dbcb964cc288 61 * and wait for service discovery to terminate before operating on the
rgrover1 479:dbcb964cc288 62 * characteristic.
rgrover1 479:dbcb964cc288 63 * @param matchingServiceUUID
rgrover1 479:dbcb964cc288 64 * UUID based filter for specifying a service in which the application is
rgrover1 479:dbcb964cc288 65 * interested. By default it is set as the wildcard UUID_UNKNOWN,
rgrover1 479:dbcb964cc288 66 * in which case it matches all services. If characteristic-UUID
rgrover1 479:dbcb964cc288 67 * filter (below) is set to the wildcard value, then a service
rgrover1 479:dbcb964cc288 68 * callback will be invoked for the matching service (or for every
rgrover1 479:dbcb964cc288 69 * service if the service filter is a wildcard).
rgrover1 479:dbcb964cc288 70 * @param matchingCharacteristicUUIDIn
rgrover1 479:dbcb964cc288 71 * UUID based filter for specifying characteristic in which the application
rgrover1 479:dbcb964cc288 72 * is interested. By default it is set as the wildcard UUID_UKNOWN
rgrover1 479:dbcb964cc288 73 * to match against any characteristic. If both service-UUID
rgrover1 479:dbcb964cc288 74 * filter and characteristic-UUID filter are used with non- wildcard
rgrover1 479:dbcb964cc288 75 * values, then only a single characteristic callback is
rgrover1 479:dbcb964cc288 76 * invoked for the matching characteristic.
rgrover1 479:dbcb964cc288 77 *
rgrover1 482:a4c6ac278fd4 78 * @Note Using wildcard values for both service-UUID and characteristic-
rgrover1 482:a4c6ac278fd4 79 * UUID will result in complete service discovery--callbacks being
rgrover1 482:a4c6ac278fd4 80 * called for every service and characteristic.
rgrover1 482:a4c6ac278fd4 81 *
rgrover1 479:dbcb964cc288 82 * @return
rgrover1 479:dbcb964cc288 83 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 479:dbcb964cc288 84 */
rgrover1 456:ff4ffb69e19f 85 static ble_error_t launch(Gap::Handle_t connectionHandle,
rgrover1 456:ff4ffb69e19f 86 ServiceCallback_t sc = NULL,
rgrover1 456:ff4ffb69e19f 87 CharacteristicCallback_t cc = NULL,
rgrover1 458:5546ebd25359 88 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
rgrover1 458:5546ebd25359 89 const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN));
rgrover1 431:1c8c592430ec 90
rgrover1 474:2a8a453ecd7e 91 /**
rgrover1 474:2a8a453ecd7e 92 * Terminate an ongoing service-discovery. This should result in an
rgrover1 474:2a8a453ecd7e 93 * invocation of the TerminationCallback if service-discovery is active.
rgrover1 474:2a8a453ecd7e 94 */
rgrover1 431:1c8c592430ec 95 static void terminate(void);
rgrover1 431:1c8c592430ec 96
rgrover1 474:2a8a453ecd7e 97 /**
rgrover1 474:2a8a453ecd7e 98 * Is service-discovery currently active?
rgrover1 474:2a8a453ecd7e 99 */
rgrover1 457:6ebc9bbde90b 100 static bool isActive(void);
rgrover1 474:2a8a453ecd7e 101
rgrover1 474:2a8a453ecd7e 102 /**
rgrover1 474:2a8a453ecd7e 103 * Setup callback to be invoked when service discovery is terminated.
rgrover1 474:2a8a453ecd7e 104 */
rgrover1 457:6ebc9bbde90b 105 static void onTermination(TerminationCallback_t callback);
rgrover1 457:6ebc9bbde90b 106
rgrover1 431:1c8c592430ec 107 protected:
rgrover1 431:1c8c592430ec 108 Gap::Handle_t connHandle; /**< Connection handle as provided by the SoftDevice. */
rgrover1 431:1c8c592430ec 109 UUID matchingServiceUUID;
rgrover1 431:1c8c592430ec 110 ServiceCallback_t serviceCallback;
rgrover1 431:1c8c592430ec 111 UUID matchingCharacteristicUUID;
rgrover1 431:1c8c592430ec 112 CharacteristicCallback_t characteristicCallback;
rgrover1 431:1c8c592430ec 113 };
rgrover1 431:1c8c592430ec 114
rgrover1 431:1c8c592430ec 115 #endif // ifndef __SERVICE_DISOVERY_H__