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public/GattClient.h@564:1d8aa4ad07fe, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:52:11 2015 +0100
Revision:
564:1d8aa4ad07fe
Parent:
559:1ee5106d3763 
Synchronized with git rev 9739a146

Author: Rohit Grover

GattClient: add helper APIs to discover services.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 527:493185cebc03 1 /* mbed Microcontroller Library
rgrover1 527:493185cebc03 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 527:493185cebc03 3 *
rgrover1 527:493185cebc03 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 527:493185cebc03 5 * you may not use this file except in compliance with the License.
rgrover1 527:493185cebc03 6 * You may obtain a copy of the License at
rgrover1 527:493185cebc03 7 *
rgrover1 527:493185cebc03 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 527:493185cebc03 9 *
rgrover1 527:493185cebc03 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 527:493185cebc03 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 527:493185cebc03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 527:493185cebc03 13 * See the License for the specific language governing permissions and
rgrover1 527:493185cebc03 14 * limitations under the License.
rgrover1 527:493185cebc03 15 */
rgrover1 527:493185cebc03 16
rgrover1 527:493185cebc03 17 #ifndef __GATT_CLIENT_H__
rgrover1 527:493185cebc03 18 #define __GATT_CLIENT_H__
rgrover1 527:493185cebc03 19
rgrover1 527:493185cebc03 20 #include "Gap.h"
rgrover1 527:493185cebc03 21 #include "GattAttribute.h"
rgrover1 527:493185cebc03 22 #include "ServiceDiscovery.h"
rgrover1 527:493185cebc03 23
rgrover1 527:493185cebc03 24 #include "GattCallbackParamTypes.h"
rgrover1 527:493185cebc03 25
rgrover1 527:493185cebc03 26 class GattClient {
rgrover1 527:493185cebc03 27 public:
rgrover1 527:493185cebc03 28 typedef void (*ReadCallback_t)(const GattReadCallbackParams *params);
rgrover1 527:493185cebc03 29
rgrover1 527:493185cebc03 30 enum WriteOp_t {
rgrover1 527:493185cebc03 31 GATT_OP_WRITE_REQ = 0x01, /**< Write Request. */
rgrover1 527:493185cebc03 32 GATT_OP_WRITE_CMD = 0x02, /**< Write Command. */
rgrover1 527:493185cebc03 33 };
rgrover1 527:493185cebc03 34
rgrover1 527:493185cebc03 35 typedef void (*WriteCallback_t)(const GattWriteCallbackParams *params);
rgrover1 527:493185cebc03 36
rgrover1 559:1ee5106d3763 37 /*
rgrover1 559:1ee5106d3763 38 * The following functions are meant to be overridden in the platform-specific sub-class.
rgrover1 559:1ee5106d3763 39 */
rgrover1 527:493185cebc03 40 public:
rgrover1 527:493185cebc03 41 /**
rgrover1 527:493185cebc03 42 * Launch service discovery. Once launched, service discovery will remain
rgrover1 527:493185cebc03 43 * active with callbacks being issued back into the application for matching
rgrover1 540:1fb1e0b809eb 44 * services/characteristics. isServiceDiscoveryActive() can be used to
rgrover1 540:1fb1e0b809eb 45 * determine status; and a termination callback (if setup) will be invoked
rgrover1 540:1fb1e0b809eb 46 * at the end. Service discovery can be terminated prematurely if needed
rgrover1 540:1fb1e0b809eb 47 * using terminateServiceDiscovery().
rgrover1 527:493185cebc03 48 *
rgrover1 527:493185cebc03 49 * @param connectionHandle
rgrover1 527:493185cebc03 50 * Handle for the connection with the peer.
rgrover1 527:493185cebc03 51 * @param sc
rgrover1 540:1fb1e0b809eb 52 * This is the application callback for matching service. Taken as
rgrover1 540:1fb1e0b809eb 53 * NULL by default. Note: service discovery may still be active
rgrover1 540:1fb1e0b809eb 54 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 540:1fb1e0b809eb 55 * APIs from within this application callback might cause the
rgrover1 540:1fb1e0b809eb 56 * stack to abort service discovery. If this becomes an issue, it
rgrover1 540:1fb1e0b809eb 57 * may be better to make local copy of the discoveredService and
rgrover1 540:1fb1e0b809eb 58 * wait for service discovery to terminate before operating on the
rgrover1 540:1fb1e0b809eb 59 * service.
rgrover1 527:493185cebc03 60 * @param cc
rgrover1 527:493185cebc03 61 * This is the application callback for matching characteristic.
rgrover1 540:1fb1e0b809eb 62 * Taken as NULL by default. Note: service discovery may still be
rgrover1 540:1fb1e0b809eb 63 * active when this callback is issued; calling asynchronous
rgrover1 540:1fb1e0b809eb 64 * BLE-stack APIs from within this application callback might cause
rgrover1 540:1fb1e0b809eb 65 * the stack to abort service discovery. If this becomes an issue,
rgrover1 540:1fb1e0b809eb 66 * it may be better to make local copy of the discoveredCharacteristic
rgrover1 540:1fb1e0b809eb 67 * and wait for service discovery to terminate before operating on the
rgrover1 540:1fb1e0b809eb 68 * characteristic.
rgrover1 527:493185cebc03 69 * @param matchingServiceUUID
rgrover1 527:493185cebc03 70 * UUID based filter for specifying a service in which the application is
rgrover1 540:1fb1e0b809eb 71 * interested. By default it is set as the wildcard UUID_UNKNOWN,
rgrover1 540:1fb1e0b809eb 72 * in which case it matches all services. If characteristic-UUID
rgrover1 540:1fb1e0b809eb 73 * filter (below) is set to the wildcard value, then a service
rgrover1 540:1fb1e0b809eb 74 * callback will be invoked for the matching service (or for every
rgrover1 540:1fb1e0b809eb 75 * service if the service filter is a wildcard).
rgrover1 527:493185cebc03 76 * @param matchingCharacteristicUUIDIn
rgrover1 527:493185cebc03 77 * UUID based filter for specifying characteristic in which the application
rgrover1 540:1fb1e0b809eb 78 * is interested. By default it is set as the wildcard UUID_UKNOWN
rgrover1 540:1fb1e0b809eb 79 * to match against any characteristic. If both service-UUID
rgrover1 540:1fb1e0b809eb 80 * filter and characteristic-UUID filter are used with non- wildcard
rgrover1 540:1fb1e0b809eb 81 * values, then only a single characteristic callback is
rgrover1 540:1fb1e0b809eb 82 * invoked for the matching characteristic.
rgrover1 527:493185cebc03 83 *
rgrover1 540:1fb1e0b809eb 84 * @note Using wildcard values for both service-UUID and characteristic-
rgrover1 527:493185cebc03 85 * UUID will result in complete service discovery--callbacks being
rgrover1 527:493185cebc03 86 * called for every service and characteristic.
rgrover1 527:493185cebc03 87 *
rgrover1 540:1fb1e0b809eb 88 * @note Providing NULL for the characteristic callback will result in
rgrover1 559:1ee5106d3763 89 * characteristic discovery being skipped for each matching
rgrover1 559:1ee5106d3763 90 * service. This allows for an inexpensive method to discover only
rgrover1 559:1ee5106d3763 91 * services.
rgrover1 540:1fb1e0b809eb 92 *
rgrover1 527:493185cebc03 93 * @return
rgrover1 527:493185cebc03 94 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 527:493185cebc03 95 */
rgrover1 527:493185cebc03 96 virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle,
rgrover1 527:493185cebc03 97 ServiceDiscovery::ServiceCallback_t sc = NULL,
rgrover1 527:493185cebc03 98 ServiceDiscovery::CharacteristicCallback_t cc = NULL,
rgrover1 527:493185cebc03 99 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
rgrover1 559:1ee5106d3763 100 const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
rgrover1 559:1ee5106d3763 101 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 102 }
rgrover1 527:493185cebc03 103
rgrover1 527:493185cebc03 104 /**
rgrover1 564:1d8aa4ad07fe 105 * Launch service discovery for services. Once launched, service discovery will remain
rgrover1 564:1d8aa4ad07fe 106 * active with service-callbacks being issued back into the application for matching
rgrover1 564:1d8aa4ad07fe 107 * services. isServiceDiscoveryActive() can be used to
rgrover1 564:1d8aa4ad07fe 108 * determine status; and a termination callback (if setup) will be invoked
rgrover1 564:1d8aa4ad07fe 109 * at the end. Service discovery can be terminated prematurely if needed
rgrover1 564:1d8aa4ad07fe 110 * using terminateServiceDiscovery().
rgrover1 564:1d8aa4ad07fe 111 *
rgrover1 564:1d8aa4ad07fe 112 * @param connectionHandle
rgrover1 564:1d8aa4ad07fe 113 * Handle for the connection with the peer.
rgrover1 564:1d8aa4ad07fe 114 * @param sc
rgrover1 564:1d8aa4ad07fe 115 * This is the application callback for matching service. Note: service discovery may still be active
rgrover1 564:1d8aa4ad07fe 116 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 564:1d8aa4ad07fe 117 * APIs from within this application callback might cause the
rgrover1 564:1d8aa4ad07fe 118 * stack to abort service discovery. If this becomes an issue, it
rgrover1 564:1d8aa4ad07fe 119 * may be better to make local copy of the discoveredService and
rgrover1 564:1d8aa4ad07fe 120 * wait for service discovery to terminate before operating on the
rgrover1 564:1d8aa4ad07fe 121 * service.
rgrover1 564:1d8aa4ad07fe 122 * @param matchingServiceUUID
rgrover1 564:1d8aa4ad07fe 123 * UUID based filter for specifying a service in which the application is
rgrover1 564:1d8aa4ad07fe 124 * interested. By default it is set as the wildcard UUID_UNKNOWN,
rgrover1 564:1d8aa4ad07fe 125 * in which case it matches all services.
rgrover1 564:1d8aa4ad07fe 126 *
rgrover1 564:1d8aa4ad07fe 127 * @return
rgrover1 564:1d8aa4ad07fe 128 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 564:1d8aa4ad07fe 129 */
rgrover1 564:1d8aa4ad07fe 130 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
rgrover1 564:1d8aa4ad07fe 131 ServiceDiscovery::ServiceCallback_t callback,
rgrover1 564:1d8aa4ad07fe 132 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
rgrover1 564:1d8aa4ad07fe 133 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 564:1d8aa4ad07fe 134 }
rgrover1 564:1d8aa4ad07fe 135
rgrover1 564:1d8aa4ad07fe 136 /**
rgrover1 564:1d8aa4ad07fe 137 * Launch service discovery for services. Once launched, service discovery will remain
rgrover1 564:1d8aa4ad07fe 138 * active with service-callbacks being issued back into the application for matching
rgrover1 564:1d8aa4ad07fe 139 * services. isServiceDiscoveryActive() can be used to
rgrover1 564:1d8aa4ad07fe 140 * determine status; and a termination callback (if setup) will be invoked
rgrover1 564:1d8aa4ad07fe 141 * at the end. Service discovery can be terminated prematurely if needed
rgrover1 564:1d8aa4ad07fe 142 * using terminateServiceDiscovery().
rgrover1 564:1d8aa4ad07fe 143 *
rgrover1 564:1d8aa4ad07fe 144 * @param connectionHandle
rgrover1 564:1d8aa4ad07fe 145 * Handle for the connection with the peer.
rgrover1 564:1d8aa4ad07fe 146 * @param sc
rgrover1 564:1d8aa4ad07fe 147 * This is the application callback for matching service. Note: service discovery may still be active
rgrover1 564:1d8aa4ad07fe 148 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 564:1d8aa4ad07fe 149 * APIs from within this application callback might cause the
rgrover1 564:1d8aa4ad07fe 150 * stack to abort service discovery. If this becomes an issue, it
rgrover1 564:1d8aa4ad07fe 151 * may be better to make local copy of the discoveredService and
rgrover1 564:1d8aa4ad07fe 152 * wait for service discovery to terminate before operating on the
rgrover1 564:1d8aa4ad07fe 153 * service.
rgrover1 564:1d8aa4ad07fe 154 * @param startHandle, endHandle
rgrover1 564:1d8aa4ad07fe 155 * Handle range within which to limit the search
rgrover1 564:1d8aa4ad07fe 156 *
rgrover1 564:1d8aa4ad07fe 157 * @return
rgrover1 564:1d8aa4ad07fe 158 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 564:1d8aa4ad07fe 159 */
rgrover1 564:1d8aa4ad07fe 160 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
rgrover1 564:1d8aa4ad07fe 161 ServiceDiscovery::ServiceCallback_t callback,
rgrover1 564:1d8aa4ad07fe 162 GattAttribute::Handle_t startHandle,
rgrover1 564:1d8aa4ad07fe 163 GattAttribute::Handle_t endHandle) {
rgrover1 564:1d8aa4ad07fe 164 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 564:1d8aa4ad07fe 165 }
rgrover1 564:1d8aa4ad07fe 166
rgrover1 564:1d8aa4ad07fe 167 /**
rgrover1 527:493185cebc03 168 * Is service-discovery currently active?
rgrover1 527:493185cebc03 169 */
rgrover1 559:1ee5106d3763 170 virtual bool isServiceDiscoveryActive(void) const {
rgrover1 559:1ee5106d3763 171 return false; /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 172 }
rgrover1 527:493185cebc03 173
rgrover1 527:493185cebc03 174 /**
rgrover1 527:493185cebc03 175 * Terminate an ongoing service-discovery. This should result in an
rgrover1 527:493185cebc03 176 * invocation of the TerminationCallback if service-discovery is active.
rgrover1 527:493185cebc03 177 */
rgrover1 559:1ee5106d3763 178 virtual void terminateServiceDiscovery(void) {
rgrover1 559:1ee5106d3763 179 /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 180 }
rgrover1 527:493185cebc03 181
rgrover1 559:1ee5106d3763 182 /* Initiate a Gatt Client read procedure by attribute-handle. */
rgrover1 559:1ee5106d3763 183 virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
rgrover1 559:1ee5106d3763 184 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 185 }
rgrover1 527:493185cebc03 186
rgrover1 540:1fb1e0b809eb 187 /**
rgrover1 540:1fb1e0b809eb 188 * Initiate a GATT Client write procedure.
rgrover1 540:1fb1e0b809eb 189 *
rgrover1 540:1fb1e0b809eb 190 * @param[in] cmd
rgrover1 540:1fb1e0b809eb 191 * Command can be either a write-request (which generates a
rgrover1 540:1fb1e0b809eb 192 * matching response from the peripheral), or a write-command,
rgrover1 540:1fb1e0b809eb 193 * which doesn't require the connected peer to respond.
rgrover1 540:1fb1e0b809eb 194 * @param[in] connHandle
rgrover1 540:1fb1e0b809eb 195 * Connection handle.
rgrover1 540:1fb1e0b809eb 196 * @param[in] attributeHandle
rgrover1 540:1fb1e0b809eb 197 * handle for the target attribtue on the remote GATT server.
rgrover1 540:1fb1e0b809eb 198 * @param[in] length
rgrover1 540:1fb1e0b809eb 199 * length of the new value.
rgrover1 540:1fb1e0b809eb 200 * @param[in] value
rgrover1 540:1fb1e0b809eb 201 * new value being written.
rgrover1 540:1fb1e0b809eb 202 */
rgrover1 527:493185cebc03 203 virtual ble_error_t write(GattClient::WriteOp_t cmd,
rgrover1 527:493185cebc03 204 Gap::Handle_t connHandle,
rgrover1 527:493185cebc03 205 GattAttribute::Handle_t attributeHandle,
rgrover1 527:493185cebc03 206 size_t length,
rgrover1 559:1ee5106d3763 207 const uint8_t *value) const {
rgrover1 559:1ee5106d3763 208 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 209 }
rgrover1 559:1ee5106d3763 210
rgrover1 559:1ee5106d3763 211 /**
rgrover1 559:1ee5106d3763 212 * Setup callback for when serviceDiscovery terminates.
rgrover1 559:1ee5106d3763 213 */
rgrover1 559:1ee5106d3763 214 virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
rgrover1 559:1ee5106d3763 215 /* default implementation; override this API if this capability is supported. */
rgrover1 559:1ee5106d3763 216 }
rgrover1 527:493185cebc03 217
rgrover1 527:493185cebc03 218 protected:
rgrover1 527:493185cebc03 219 GattClient() {
rgrover1 527:493185cebc03 220 /* empty */
rgrover1 527:493185cebc03 221 }
rgrover1 527:493185cebc03 222
rgrover1 527:493185cebc03 223 private:
rgrover1 527:493185cebc03 224 /* disallow copy and assignment */
rgrover1 527:493185cebc03 225 GattClient(const GattClient &);
rgrover1 527:493185cebc03 226 GattClient& operator=(const GattClient &);
rgrover1 527:493185cebc03 227 };
rgrover1 527:493185cebc03 228
rgrover1 527:493185cebc03 229 #endif // ifndef __GATT_CLIENT_H__