Lee Kai Xuan / mbed-os

Fork of mbed-os by erkin yucel

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16
elessair 0:f269e3021894 17 #ifndef __GATT_CLIENT_H__
elessair 0:f269e3021894 18 #define __GATT_CLIENT_H__
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 #include "Gap.h"
elessair 0:f269e3021894 21 #include "GattAttribute.h"
elessair 0:f269e3021894 22 #include "ServiceDiscovery.h"
elessair 0:f269e3021894 23 #include "CharacteristicDescriptorDiscovery.h"
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 #include "GattCallbackParamTypes.h"
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 #include "CallChainOfFunctionPointersWithContext.h"
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 class GattClient {
elessair 0:f269e3021894 30 public:
elessair 0:f269e3021894 31 /**
elessair 0:f269e3021894 32 * Type for the registered callbacks added to the data read callchain.
elessair 0:f269e3021894 33 * Refer to GattClient::onDataRead().
elessair 0:f269e3021894 34 */
elessair 0:f269e3021894 35 typedef FunctionPointerWithContext<const GattReadCallbackParams*> ReadCallback_t;
elessair 0:f269e3021894 36 /**
elessair 0:f269e3021894 37 * Type for the data read event callchain. Refer to GattClient::onDataRead().
elessair 0:f269e3021894 38 */
elessair 0:f269e3021894 39 typedef CallChainOfFunctionPointersWithContext<const GattReadCallbackParams*> ReadCallbackChain_t;
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 /**
elessair 0:f269e3021894 42 * Enumerator for write operations.
elessair 0:f269e3021894 43 */
elessair 0:f269e3021894 44 enum WriteOp_t {
elessair 0:f269e3021894 45 GATT_OP_WRITE_REQ = 0x01, /**< Write request. */
elessair 0:f269e3021894 46 GATT_OP_WRITE_CMD = 0x02, /**< Write command. */
elessair 0:f269e3021894 47 };
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49 /**
elessair 0:f269e3021894 50 * Type for the registered callbacks added to the data write callchain.
elessair 0:f269e3021894 51 * Refer to GattClient::onDataWrite().
elessair 0:f269e3021894 52 */
elessair 0:f269e3021894 53 typedef FunctionPointerWithContext<const GattWriteCallbackParams*> WriteCallback_t;
elessair 0:f269e3021894 54 /**
elessair 0:f269e3021894 55 * Type for the data write event callchain. Refer to GattClient::onDataWrite().
elessair 0:f269e3021894 56 */
elessair 0:f269e3021894 57 typedef CallChainOfFunctionPointersWithContext<const GattWriteCallbackParams*> WriteCallbackChain_t;
elessair 0:f269e3021894 58
elessair 0:f269e3021894 59 /**
elessair 0:f269e3021894 60 * Type for the registered callbacks added to the update event callchain.
elessair 0:f269e3021894 61 * Refer to GattClient::onHVX().
elessair 0:f269e3021894 62 */
elessair 0:f269e3021894 63 typedef FunctionPointerWithContext<const GattHVXCallbackParams*> HVXCallback_t;
elessair 0:f269e3021894 64 /**
elessair 0:f269e3021894 65 * Type for the update event callchain. Refer to GattClient::onHVX().
elessair 0:f269e3021894 66 */
elessair 0:f269e3021894 67 typedef CallChainOfFunctionPointersWithContext<const GattHVXCallbackParams*> HVXCallbackChain_t;
elessair 0:f269e3021894 68
elessair 0:f269e3021894 69 /**
elessair 0:f269e3021894 70 * Type for the registered callbacks added to the shutdown callchain.
elessair 0:f269e3021894 71 * Refer to GattClient::onShutdown().
elessair 0:f269e3021894 72 */
elessair 0:f269e3021894 73 typedef FunctionPointerWithContext<const GattClient *> GattClientShutdownCallback_t;
elessair 0:f269e3021894 74 /**
elessair 0:f269e3021894 75 * Type for the shutdown event callchain. Refer to GattClient::onShutown().
elessair 0:f269e3021894 76 */
elessair 0:f269e3021894 77 typedef CallChainOfFunctionPointersWithContext<const GattClient *> GattClientShutdownCallbackChain_t;
elessair 0:f269e3021894 78
elessair 0:f269e3021894 79 /*
elessair 0:f269e3021894 80 * The following functions are meant to be overridden in the platform-specific sub-class.
elessair 0:f269e3021894 81 */
elessair 0:f269e3021894 82 public:
elessair 0:f269e3021894 83 /**
elessair 0:f269e3021894 84 * Launch service discovery. Once launched, application callbacks will be
elessair 0:f269e3021894 85 * invoked for matching services or characteristics. isServiceDiscoveryActive()
elessair 0:f269e3021894 86 * can be used to determine status, and a termination callback (if one was set up)
elessair 0:f269e3021894 87 * will be invoked at the end. Service discovery can be terminated prematurely,
elessair 0:f269e3021894 88 * if needed, using terminateServiceDiscovery().
elessair 0:f269e3021894 89 *
elessair 0:f269e3021894 90 * @param[in] connectionHandle
elessair 0:f269e3021894 91 * Handle for the connection with the peer.
elessair 0:f269e3021894 92 * @param[in] sc
elessair 0:f269e3021894 93 * This is the application callback for a matching service. Taken as
elessair 0:f269e3021894 94 * NULL by default. Note: service discovery may still be active
elessair 0:f269e3021894 95 * when this callback is issued; calling asynchronous BLE-stack
elessair 0:f269e3021894 96 * APIs from within this application callback might cause the
elessair 0:f269e3021894 97 * stack to abort service discovery. If this becomes an issue, it
elessair 0:f269e3021894 98 * may be better to make a local copy of the discoveredService and
elessair 0:f269e3021894 99 * wait for service discovery to terminate before operating on the
elessair 0:f269e3021894 100 * service.
elessair 0:f269e3021894 101 * @param[in] cc
elessair 0:f269e3021894 102 * This is the application callback for a matching characteristic.
elessair 0:f269e3021894 103 * Taken as NULL by default. Note: service discovery may still be
elessair 0:f269e3021894 104 * active when this callback is issued; calling asynchronous
elessair 0:f269e3021894 105 * BLE-stack APIs from within this application callback might cause
elessair 0:f269e3021894 106 * the stack to abort service discovery. If this becomes an issue,
elessair 0:f269e3021894 107 * it may be better to make a local copy of the discoveredCharacteristic
elessair 0:f269e3021894 108 * and wait for service discovery to terminate before operating on the
elessair 0:f269e3021894 109 * characteristic.
elessair 0:f269e3021894 110 * @param[in] matchingServiceUUID
elessair 0:f269e3021894 111 * UUID-based filter for specifying a service in which the application is
elessair 0:f269e3021894 112 * interested. By default it is set as the wildcard UUID_UNKNOWN,
elessair 0:f269e3021894 113 * in which case it matches all services. If characteristic-UUID
elessair 0:f269e3021894 114 * filter (below) is set to the wildcard value, then a service
elessair 0:f269e3021894 115 * callback will be invoked for the matching service (or for every
elessair 0:f269e3021894 116 * service if the service filter is a wildcard).
elessair 0:f269e3021894 117 * @param[in] matchingCharacteristicUUIDIn
elessair 0:f269e3021894 118 * UUID-based filter for specifying characteristic in which the application
elessair 0:f269e3021894 119 * is interested. By default it is set as the wildcard UUID_UKNOWN
elessair 0:f269e3021894 120 * to match against any characteristic. If both service-UUID
elessair 0:f269e3021894 121 * filter and characteristic-UUID filter are used with non-wildcard
elessair 0:f269e3021894 122 * values, then only a single characteristic callback is
elessair 0:f269e3021894 123 * invoked for the matching characteristic.
elessair 0:f269e3021894 124 *
elessair 0:f269e3021894 125 * @note Using wildcard values for both service-UUID and characteristic-
elessair 0:f269e3021894 126 * UUID will result in complete service discovery: callbacks being
elessair 0:f269e3021894 127 * called for every service and characteristic.
elessair 0:f269e3021894 128 *
elessair 0:f269e3021894 129 * @note Providing NULL for the characteristic callback will result in
elessair 0:f269e3021894 130 * characteristic discovery being skipped for each matching
elessair 0:f269e3021894 131 * service. This allows for an inexpensive method to discover only
elessair 0:f269e3021894 132 * services.
elessair 0:f269e3021894 133 *
elessair 0:f269e3021894 134 * @return
elessair 0:f269e3021894 135 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
elessair 0:f269e3021894 136 */
elessair 0:f269e3021894 137 virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle,
elessair 0:f269e3021894 138 ServiceDiscovery::ServiceCallback_t sc = NULL,
elessair 0:f269e3021894 139 ServiceDiscovery::CharacteristicCallback_t cc = NULL,
elessair 0:f269e3021894 140 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
elessair 0:f269e3021894 141 const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
elessair 0:f269e3021894 142 /* Avoid compiler warnings about unused variables. */
elessair 0:f269e3021894 143 (void)connectionHandle;
elessair 0:f269e3021894 144 (void)sc;
elessair 0:f269e3021894 145 (void)cc;
elessair 0:f269e3021894 146 (void)matchingServiceUUID;
elessair 0:f269e3021894 147 (void)matchingCharacteristicUUIDIn;
elessair 0:f269e3021894 148
elessair 0:f269e3021894 149 return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 150 }
elessair 0:f269e3021894 151
elessair 0:f269e3021894 152 /**
elessair 0:f269e3021894 153 * Launch service discovery for services. Once launched, service discovery will remain
elessair 0:f269e3021894 154 * active with service-callbacks being issued back into the application for matching
elessair 0:f269e3021894 155 * services. isServiceDiscoveryActive() can be used to
elessair 0:f269e3021894 156 * determine status, and a termination callback (if set up) will be invoked
elessair 0:f269e3021894 157 * at the end. Service discovery can be terminated prematurely, if needed,
elessair 0:f269e3021894 158 * using terminateServiceDiscovery().
elessair 0:f269e3021894 159 *
elessair 0:f269e3021894 160 * @param[in] connectionHandle
elessair 0:f269e3021894 161 * Handle for the connection with the peer.
elessair 0:f269e3021894 162 * @param[in] callback
elessair 0:f269e3021894 163 * This is the application callback for a matching service.
elessair 0:f269e3021894 164 * Note: service discovery may still be active
elessair 0:f269e3021894 165 * when this callback is issued; calling asynchronous BLE-stack
elessair 0:f269e3021894 166 * APIs from within this application callback might cause the
elessair 0:f269e3021894 167 * stack to abort service discovery. If this becomes an issue, it
elessair 0:f269e3021894 168 * may be better to make a local copy of the discoveredService and
elessair 0:f269e3021894 169 * wait for service discovery to terminate before operating on the
elessair 0:f269e3021894 170 * service.
elessair 0:f269e3021894 171 * @param[in] matchingServiceUUID
elessair 0:f269e3021894 172 * UUID-based filter for specifying a service in which the application is
elessair 0:f269e3021894 173 * interested. By default it is set as the wildcard UUID_UNKNOWN,
elessair 0:f269e3021894 174 * in which case it matches all services.
elessair 0:f269e3021894 175 *
elessair 0:f269e3021894 176 * @return
elessair 0:f269e3021894 177 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
elessair 0:f269e3021894 178 */
elessair 0:f269e3021894 179 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
elessair 0:f269e3021894 180 ServiceDiscovery::ServiceCallback_t callback,
elessair 0:f269e3021894 181 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
elessair 0:f269e3021894 182 return launchServiceDiscovery(connectionHandle, callback, NULL, matchingServiceUUID); /* We take advantage of the property
elessair 0:f269e3021894 183 * that providing NULL for the characteristic callback will result in
elessair 0:f269e3021894 184 * characteristic discovery being skipped for each matching
elessair 0:f269e3021894 185 * service. This allows for an inexpensive method to discover only
elessair 0:f269e3021894 186 * services. Porters are free to override this. */
elessair 0:f269e3021894 187 }
elessair 0:f269e3021894 188
elessair 0:f269e3021894 189 /**
elessair 0:f269e3021894 190 * Launch service discovery for services. Once launched, service discovery will remain
elessair 0:f269e3021894 191 * active with service-callbacks being issued back into the application for matching
elessair 0:f269e3021894 192 * services. isServiceDiscoveryActive() can be used to
elessair 0:f269e3021894 193 * determine status, and a termination callback (if set up) will be invoked
elessair 0:f269e3021894 194 * at the end. Service discovery can be terminated prematurely, if needed,
elessair 0:f269e3021894 195 * using terminateServiceDiscovery().
elessair 0:f269e3021894 196 *
elessair 0:f269e3021894 197 * @param[in] connectionHandle
elessair 0:f269e3021894 198 * Handle for the connection with the peer.
elessair 0:f269e3021894 199 * @param[in] callback
elessair 0:f269e3021894 200 * This is the application callback for a matching service.
elessair 0:f269e3021894 201 * Note: service discovery may still be active
elessair 0:f269e3021894 202 * when this callback is issued; calling asynchronous BLE-stack
elessair 0:f269e3021894 203 * APIs from within this application callback might cause the
elessair 0:f269e3021894 204 * stack to abort service discovery. If this becomes an issue, it
elessair 0:f269e3021894 205 * may be better to make a local copy of the discoveredService and
elessair 0:f269e3021894 206 * wait for service discovery to terminate before operating on the
elessair 0:f269e3021894 207 * service.
elessair 0:f269e3021894 208 * @param[in] startHandle, endHandle
elessair 0:f269e3021894 209 * Handle range within which to limit the search.
elessair 0:f269e3021894 210 *
elessair 0:f269e3021894 211 * @return
elessair 0:f269e3021894 212 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
elessair 0:f269e3021894 213 */
elessair 0:f269e3021894 214 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
elessair 0:f269e3021894 215 ServiceDiscovery::ServiceCallback_t callback,
elessair 0:f269e3021894 216 GattAttribute::Handle_t startHandle,
elessair 0:f269e3021894 217 GattAttribute::Handle_t endHandle) {
elessair 0:f269e3021894 218 /* Avoid compiler warnings about unused variables. */
elessair 0:f269e3021894 219 (void)connectionHandle;
elessair 0:f269e3021894 220 (void)callback;
elessair 0:f269e3021894 221 (void)startHandle;
elessair 0:f269e3021894 222 (void)endHandle;
elessair 0:f269e3021894 223
elessair 0:f269e3021894 224 return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 225 }
elessair 0:f269e3021894 226
elessair 0:f269e3021894 227 /**
elessair 0:f269e3021894 228 * Check if service-discovery is currently active.
elessair 0:f269e3021894 229 *
elessair 0:f269e3021894 230 * @return true if service-discovery is active, false otherwise.
elessair 0:f269e3021894 231 */
elessair 0:f269e3021894 232 virtual bool isServiceDiscoveryActive(void) const {
elessair 0:f269e3021894 233 return false; /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 234 }
elessair 0:f269e3021894 235
elessair 0:f269e3021894 236 /**
elessair 0:f269e3021894 237 * Terminate an ongoing service discovery. This should result in an
elessair 0:f269e3021894 238 * invocation of TerminationCallback if service-discovery is active.
elessair 0:f269e3021894 239 */
elessair 0:f269e3021894 240 virtual void terminateServiceDiscovery(void) {
elessair 0:f269e3021894 241 /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 242 }
elessair 0:f269e3021894 243
elessair 0:f269e3021894 244 /**
elessair 0:f269e3021894 245 * Initiate a GATT Client read procedure by attribute-handle.
elessair 0:f269e3021894 246 *
elessair 0:f269e3021894 247 * @param[in] connHandle
elessair 0:f269e3021894 248 * Handle for the connection with the peer.
elessair 0:f269e3021894 249 * @param[in] attributeHandle
elessair 0:f269e3021894 250 * Handle of the attribute to read data from.
elessair 0:f269e3021894 251 * @param[in] offset
elessair 0:f269e3021894 252 * The offset from the start of the attribute value to be read.
elessair 0:f269e3021894 253 *
elessair 0:f269e3021894 254 * @return
elessair 0:f269e3021894 255 * BLE_ERROR_NONE if read procedure was successfully started.
elessair 0:f269e3021894 256 */
elessair 0:f269e3021894 257 virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
elessair 0:f269e3021894 258 /* Avoid compiler warnings about unused variables. */
elessair 0:f269e3021894 259 (void)connHandle;
elessair 0:f269e3021894 260 (void)attributeHandle;
elessair 0:f269e3021894 261 (void)offset;
elessair 0:f269e3021894 262
elessair 0:f269e3021894 263 return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 264 }
elessair 0:f269e3021894 265
elessair 0:f269e3021894 266 /**
elessair 0:f269e3021894 267 * Initiate a GATT Client write procedure.
elessair 0:f269e3021894 268 *
elessair 0:f269e3021894 269 * @param[in] cmd
elessair 0:f269e3021894 270 * Command can be either a write-request (which generates a
elessair 0:f269e3021894 271 * matching response from the peripheral), or a write-command
elessair 0:f269e3021894 272 * (which doesn't require the connected peer to respond).
elessair 0:f269e3021894 273 * @param[in] connHandle
elessair 0:f269e3021894 274 * Connection handle.
elessair 0:f269e3021894 275 * @param[in] attributeHandle
elessair 0:f269e3021894 276 * Handle for the target attribtue on the remote GATT server.
elessair 0:f269e3021894 277 * @param[in] length
elessair 0:f269e3021894 278 * Length of the new value.
elessair 0:f269e3021894 279 * @param[in] value
elessair 0:f269e3021894 280 * New value being written.
elessair 0:f269e3021894 281 *
elessair 0:f269e3021894 282 * @return
elessair 0:f269e3021894 283 * BLE_ERROR_NONE if write procedure was successfully started.
elessair 0:f269e3021894 284 */
elessair 0:f269e3021894 285 virtual ble_error_t write(GattClient::WriteOp_t cmd,
elessair 0:f269e3021894 286 Gap::Handle_t connHandle,
elessair 0:f269e3021894 287 GattAttribute::Handle_t attributeHandle,
elessair 0:f269e3021894 288 size_t length,
elessair 0:f269e3021894 289 const uint8_t *value) const {
elessair 0:f269e3021894 290 /* Avoid compiler warnings about unused variables. */
elessair 0:f269e3021894 291 (void)cmd;
elessair 0:f269e3021894 292 (void)connHandle;
elessair 0:f269e3021894 293 (void)attributeHandle;
elessair 0:f269e3021894 294 (void)length;
elessair 0:f269e3021894 295 (void)value;
elessair 0:f269e3021894 296
elessair 0:f269e3021894 297 return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 298 }
elessair 0:f269e3021894 299
elessair 0:f269e3021894 300 /* Event callback handlers. */
elessair 0:f269e3021894 301 public:
elessair 0:f269e3021894 302 /**
elessair 0:f269e3021894 303 * Set up a callback for read response events.
elessair 0:f269e3021894 304 *
elessair 0:f269e3021894 305 * @param[in] callback
elessair 0:f269e3021894 306 * Event handler being registered.
elessair 0:f269e3021894 307 *
elessair 0:f269e3021894 308 * @note It is possible to chain together multiple onDataRead callbacks
elessair 0:f269e3021894 309 * (potentially from different modules of an application).
elessair 0:f269e3021894 310 *
elessair 0:f269e3021894 311 * @note It is possible to unregister a callback using
elessair 0:f269e3021894 312 * onDataRead().detach(callbackToRemove).
elessair 0:f269e3021894 313 */
elessair 0:f269e3021894 314 void onDataRead(ReadCallback_t callback) {
elessair 0:f269e3021894 315 onDataReadCallbackChain.add(callback);
elessair 0:f269e3021894 316 }
elessair 0:f269e3021894 317
elessair 0:f269e3021894 318 /**
elessair 0:f269e3021894 319 * @brief Provide access to the callchain of read event callbacks.
elessair 0:f269e3021894 320 *
elessair 0:f269e3021894 321 * @return A reference to the read event callback chain.
elessair 0:f269e3021894 322 *
elessair 0:f269e3021894 323 * @note It is possible to register callbacks using onDataRead().add(callback).
elessair 0:f269e3021894 324 *
elessair 0:f269e3021894 325 * @note It is possible to unregister callbacks using onDataRead().detach(callback).
elessair 0:f269e3021894 326 */
elessair 0:f269e3021894 327 ReadCallbackChain_t& onDataRead() {
elessair 0:f269e3021894 328 return onDataReadCallbackChain;
elessair 0:f269e3021894 329 }
elessair 0:f269e3021894 330
elessair 0:f269e3021894 331 /**
elessair 0:f269e3021894 332 * Set up a callback for write response events.
elessair 0:f269e3021894 333 *
elessair 0:f269e3021894 334 * @param[in] callback
elessair 0:f269e3021894 335 * Event handler being registered.
elessair 0:f269e3021894 336 *
elessair 0:f269e3021894 337 * @note It is possible to remove registered callbacks using
elessair 0:f269e3021894 338 * onDataWritten().detach(callbackToRemove).
elessair 0:f269e3021894 339 *
elessair 0:f269e3021894 340 * @note Write commands (issued using writeWoResponse) don't generate a response.
elessair 0:f269e3021894 341 */
elessair 0:f269e3021894 342 void onDataWritten(WriteCallback_t callback) {
elessair 0:f269e3021894 343 onDataWriteCallbackChain.add(callback);
elessair 0:f269e3021894 344 }
elessair 0:f269e3021894 345
elessair 0:f269e3021894 346 /**
elessair 0:f269e3021894 347 * @brief Provide access to the callchain of data written callbacks.
elessair 0:f269e3021894 348 *
elessair 0:f269e3021894 349 * @return A reference to the data written callbacks chain.
elessair 0:f269e3021894 350 *
elessair 0:f269e3021894 351 * @note It is possible to register callbacks using onDataWritten().add(callback).
elessair 0:f269e3021894 352 *
elessair 0:f269e3021894 353 * @note It is possible to unregister callbacks using onDataWritten().detach(callback).
elessair 0:f269e3021894 354 */
elessair 0:f269e3021894 355 WriteCallbackChain_t& onDataWritten() {
elessair 0:f269e3021894 356 return onDataWriteCallbackChain;
elessair 0:f269e3021894 357 }
elessair 0:f269e3021894 358
elessair 0:f269e3021894 359 /**
elessair 0:f269e3021894 360 * Set up a callback for write response events.
elessair 0:f269e3021894 361 *
elessair 0:f269e3021894 362 * @param[in] callback
elessair 0:f269e3021894 363 * Event handler being registered.
elessair 0:f269e3021894 364 *
elessair 0:f269e3021894 365 * @note Write commands (issued using writeWoResponse) don't generate a response.
elessair 0:f269e3021894 366 *
elessair 0:f269e3021894 367 * @deprecated Please use GattServer::onDataWritten() instead.
elessair 0:f269e3021894 368 */
elessair 0:f269e3021894 369 void onDataWrite(WriteCallback_t callback) {
elessair 0:f269e3021894 370 onDataWritten(callback);
elessair 0:f269e3021894 371 }
elessair 0:f269e3021894 372
elessair 0:f269e3021894 373 /**
elessair 0:f269e3021894 374 * Set up a callback for when serviceDiscovery terminates.
elessair 0:f269e3021894 375 *
elessair 0:f269e3021894 376 * @param[in] callback
elessair 0:f269e3021894 377 * Event handler being registered.
elessair 0:f269e3021894 378 */
elessair 0:f269e3021894 379 virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
elessair 0:f269e3021894 380 (void)callback; /* Avoid compiler warnings about ununsed variables. */
elessair 0:f269e3021894 381
elessair 0:f269e3021894 382 /* Requesting action from porters: override this API if this capability is supported. */
elessair 0:f269e3021894 383 }
elessair 0:f269e3021894 384
elessair 0:f269e3021894 385 /**
elessair 0:f269e3021894 386 * @brief Launch discovery of descriptors for a given characteristic.
elessair 0:f269e3021894 387 *
elessair 0:f269e3021894 388 * @details This function will discover all descriptors available for a
elessair 0:f269e3021894 389 * specific characteristic.
elessair 0:f269e3021894 390 *
elessair 0:f269e3021894 391 * @param[in] characteristic
elessair 0:f269e3021894 392 * The characteristic targeted by this discovery procedure.
elessair 0:f269e3021894 393 * @param[in] discoveryCallback
elessair 0:f269e3021894 394 * User function called each time a descriptor is found during
elessair 0:f269e3021894 395 * the procedure.
elessair 0:f269e3021894 396 * @param[in] terminationCallback
elessair 0:f269e3021894 397 * User provided function which will be called once the
elessair 0:f269e3021894 398 * discovery procedure is terminating. This will get called
elessair 0:f269e3021894 399 * when all the descriptors have been discovered or if an
elessair 0:f269e3021894 400 * error occur during the discovery procedure.
elessair 0:f269e3021894 401 *
elessair 0:f269e3021894 402 * @return
elessair 0:f269e3021894 403 * BLE_ERROR_NONE if characteristic descriptor discovery is launched
elessair 0:f269e3021894 404 * successfully; else an appropriate error.
elessair 0:f269e3021894 405 */
elessair 0:f269e3021894 406 virtual ble_error_t discoverCharacteristicDescriptors(
elessair 0:f269e3021894 407 const DiscoveredCharacteristic& characteristic,
elessair 0:f269e3021894 408 const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& discoveryCallback,
elessair 0:f269e3021894 409 const CharacteristicDescriptorDiscovery::TerminationCallback_t& terminationCallback) {
elessair 0:f269e3021894 410 (void) characteristic;
elessair 0:f269e3021894 411 (void) discoveryCallback;
elessair 0:f269e3021894 412 (void) terminationCallback;
elessair 0:f269e3021894 413 /* Requesting action from porter(s): override this API if this capability is supported. */
elessair 0:f269e3021894 414 return BLE_ERROR_NOT_IMPLEMENTED;
elessair 0:f269e3021894 415 }
elessair 0:f269e3021894 416
elessair 0:f269e3021894 417 /**
elessair 0:f269e3021894 418 * @brief Indicate if the discovery of characteristic descriptors is active
elessair 0:f269e3021894 419 * for a given characteristic or not.
elessair 0:f269e3021894 420 *
elessair 0:f269e3021894 421 * @param[in] characteristic
elessair 0:f269e3021894 422 * The characteristic concerned by the descriptors discovery.
elessair 0:f269e3021894 423 *
elessair 0:f269e3021894 424 * @return true if a descriptors discovery is active for the characteristic
elessair 0:f269e3021894 425 * in input; otherwise false.
elessair 0:f269e3021894 426 */
elessair 0:f269e3021894 427 virtual bool isCharacteristicDescriptorDiscoveryActive(const DiscoveredCharacteristic& characteristic) const
elessair 0:f269e3021894 428 {
elessair 0:f269e3021894 429 (void) characteristic;
elessair 0:f269e3021894 430 return false; /* Requesting action from porter(s): override this API if this capability is supported. */
elessair 0:f269e3021894 431 }
elessair 0:f269e3021894 432
elessair 0:f269e3021894 433 /**
elessair 0:f269e3021894 434 * @brief Terminate an ongoing characteristic descriptor discovery.
elessair 0:f269e3021894 435 *
elessair 0:f269e3021894 436 * @details This should result in an invocation of the TerminationCallback if
elessair 0:f269e3021894 437 * the characteristic descriptor discovery is active.
elessair 0:f269e3021894 438 *
elessair 0:f269e3021894 439 * @param[in] characteristic
elessair 0:f269e3021894 440 * The characteristic on which the running descriptors
elessair 0:f269e3021894 441 * discovery should be stopped.
elessair 0:f269e3021894 442 */
elessair 0:f269e3021894 443 virtual void terminateCharacteristicDescriptorDiscovery(const DiscoveredCharacteristic& characteristic) {
elessair 0:f269e3021894 444 /* Requesting action from porter(s): override this API if this capability is supported. */
elessair 0:f269e3021894 445 (void) characteristic;
elessair 0:f269e3021894 446 }
elessair 0:f269e3021894 447
elessair 0:f269e3021894 448 /**
elessair 0:f269e3021894 449 * Set up a callback for when the GATT Client receives an update event
elessair 0:f269e3021894 450 * corresponding to a change in the value of a characteristic on the remote
elessair 0:f269e3021894 451 * GATT Server.
elessair 0:f269e3021894 452 *
elessair 0:f269e3021894 453 * @note It is possible to unregister callbacks using
elessair 0:f269e3021894 454 * onHVX().detach(callbackToRemove).
elessair 0:f269e3021894 455 */
elessair 0:f269e3021894 456 void onHVX(HVXCallback_t callback) {
elessair 0:f269e3021894 457 onHVXCallbackChain.add(callback);
elessair 0:f269e3021894 458 }
elessair 0:f269e3021894 459
elessair 0:f269e3021894 460 /**
elessair 0:f269e3021894 461 * Setup a callback to be invoked to notify the user application that the
elessair 0:f269e3021894 462 * GattClient instance is about to shutdown (possibly as a result of a call
elessair 0:f269e3021894 463 * to BLE::shutdown()).
elessair 0:f269e3021894 464 *
elessair 0:f269e3021894 465 * @param[in] callback
elessair 0:f269e3021894 466 * Event handler being registered.
elessair 0:f269e3021894 467 *
elessair 0:f269e3021894 468 * @note It is possible to chain together multiple onShutdown callbacks
elessair 0:f269e3021894 469 * (potentially from different modules of an application) to be notified
elessair 0:f269e3021894 470 * before the GattClient is shutdown.
elessair 0:f269e3021894 471 *
elessair 0:f269e3021894 472 * @note It is also possible to set up a callback into a member function of
elessair 0:f269e3021894 473 * some object.
elessair 0:f269e3021894 474 *
elessair 0:f269e3021894 475 * @note It is possible to unregister a callback using onShutdown().detach(callback).
elessair 0:f269e3021894 476 */
elessair 0:f269e3021894 477 void onShutdown(const GattClientShutdownCallback_t& callback) {
elessair 0:f269e3021894 478 shutdownCallChain.add(callback);
elessair 0:f269e3021894 479 }
elessair 0:f269e3021894 480
elessair 0:f269e3021894 481 /**
elessair 0:f269e3021894 482 * Same as GattClient::onShutdown(), but allows the possibility to add an object
elessair 0:f269e3021894 483 * reference and member function as handler for shutdown event
elessair 0:f269e3021894 484 * callbacks.
elessair 0:f269e3021894 485 *
elessair 0:f269e3021894 486 * @param[in] objPtr
elessair 0:f269e3021894 487 * Pointer to the object of a class defining the member callback
elessair 0:f269e3021894 488 * function (@p memberPtr).
elessair 0:f269e3021894 489 * @param[in] memberPtr
elessair 0:f269e3021894 490 * The member callback (within the context of an object) to be
elessair 0:f269e3021894 491 * invoked.
elessair 0:f269e3021894 492 */
elessair 0:f269e3021894 493 template <typename T>
elessair 0:f269e3021894 494 void onShutdown(T *objPtr, void (T::*memberPtr)(const GattClient *)) {
elessair 0:f269e3021894 495 shutdownCallChain.add(objPtr, memberPtr);
elessair 0:f269e3021894 496 }
elessair 0:f269e3021894 497
elessair 0:f269e3021894 498 /**
elessair 0:f269e3021894 499 * @brief Provide access to the callchain of shutdown event callbacks.
elessair 0:f269e3021894 500 *
elessair 0:f269e3021894 501 * @return A reference to the shutdown event callbacks chain.
elessair 0:f269e3021894 502 *
elessair 0:f269e3021894 503 * @note It is possible to register callbacks using onShutdown().add(callback).
elessair 0:f269e3021894 504 *
elessair 0:f269e3021894 505 * @note It is possible to unregister callbacks using onShutdown().detach(callback).
elessair 0:f269e3021894 506 */
elessair 0:f269e3021894 507 GattClientShutdownCallbackChain_t& onShutdown() {
elessair 0:f269e3021894 508 return shutdownCallChain;
elessair 0:f269e3021894 509 }
elessair 0:f269e3021894 510
elessair 0:f269e3021894 511 /**
elessair 0:f269e3021894 512 * @brief provide access to the callchain of HVX callbacks.
elessair 0:f269e3021894 513 *
elessair 0:f269e3021894 514 * @return A reference to the HVX callbacks chain.
elessair 0:f269e3021894 515 *
elessair 0:f269e3021894 516 * @note It is possible to register callbacks using onHVX().add(callback).
elessair 0:f269e3021894 517 *
elessair 0:f269e3021894 518 * @note It is possible to unregister callbacks using onHVX().detach(callback).
elessair 0:f269e3021894 519 */
elessair 0:f269e3021894 520 HVXCallbackChain_t& onHVX() {
elessair 0:f269e3021894 521 return onHVXCallbackChain;
elessair 0:f269e3021894 522 }
elessair 0:f269e3021894 523
elessair 0:f269e3021894 524 public:
elessair 0:f269e3021894 525 /**
elessair 0:f269e3021894 526 * Notify all registered onShutdown callbacks that the GattClient is
elessair 0:f269e3021894 527 * about to be shutdown and clear all GattClient state of the
elessair 0:f269e3021894 528 * associated object.
elessair 0:f269e3021894 529 *
elessair 0:f269e3021894 530 * This function is meant to be overridden in the platform-specific
elessair 0:f269e3021894 531 * sub-class. Nevertheless, the sub-class is only expected to reset its
elessair 0:f269e3021894 532 * state and not the data held in GattClient members. This shall be achieved
elessair 0:f269e3021894 533 * by a call to GattClient::reset() from the sub-class' reset()
elessair 0:f269e3021894 534 * implementation.
elessair 0:f269e3021894 535 *
elessair 0:f269e3021894 536 * @return BLE_ERROR_NONE on success.
elessair 0:f269e3021894 537 */
elessair 0:f269e3021894 538 virtual ble_error_t reset(void) {
elessair 0:f269e3021894 539 /* Notify that the instance is about to shutdown */
elessair 0:f269e3021894 540 shutdownCallChain.call(this);
elessair 0:f269e3021894 541 shutdownCallChain.clear();
elessair 0:f269e3021894 542
elessair 0:f269e3021894 543 onDataReadCallbackChain.clear();
elessair 0:f269e3021894 544 onDataWriteCallbackChain.clear();
elessair 0:f269e3021894 545 onHVXCallbackChain.clear();
elessair 0:f269e3021894 546
elessair 0:f269e3021894 547 return BLE_ERROR_NONE;
elessair 0:f269e3021894 548 }
elessair 0:f269e3021894 549
elessair 0:f269e3021894 550 protected:
elessair 0:f269e3021894 551 GattClient() {
elessair 0:f269e3021894 552 /* Empty */
elessair 0:f269e3021894 553 }
elessair 0:f269e3021894 554
elessair 0:f269e3021894 555 /* Entry points for the underlying stack to report events back to the user. */
elessair 0:f269e3021894 556 public:
elessair 0:f269e3021894 557 /**
elessair 0:f269e3021894 558 * Helper function that notifies all registered handlers of an occurrence
elessair 0:f269e3021894 559 * of a data read event. This function is meant to be called from the
elessair 0:f269e3021894 560 * BLE stack specific implementation when a data read event occurs.
elessair 0:f269e3021894 561 *
elessair 0:f269e3021894 562 * @param[in] params
elessair 0:f269e3021894 563 * The data read parameters passed to the registered
elessair 0:f269e3021894 564 * handlers.
elessair 0:f269e3021894 565 */
elessair 0:f269e3021894 566 void processReadResponse(const GattReadCallbackParams *params) {
elessair 0:f269e3021894 567 onDataReadCallbackChain(params);
elessair 0:f269e3021894 568 }
elessair 0:f269e3021894 569
elessair 0:f269e3021894 570 /**
elessair 0:f269e3021894 571 * Helper function that notifies all registered handlers of an occurrence
elessair 0:f269e3021894 572 * of a data written event. This function is meant to be called from the
elessair 0:f269e3021894 573 * BLE stack specific implementation when a data written event occurs.
elessair 0:f269e3021894 574 *
elessair 0:f269e3021894 575 * @param[in] params
elessair 0:f269e3021894 576 * The data written parameters passed to the registered
elessair 0:f269e3021894 577 * handlers.
elessair 0:f269e3021894 578 */
elessair 0:f269e3021894 579 void processWriteResponse(const GattWriteCallbackParams *params) {
elessair 0:f269e3021894 580 onDataWriteCallbackChain(params);
elessair 0:f269e3021894 581 }
elessair 0:f269e3021894 582
elessair 0:f269e3021894 583 /**
elessair 0:f269e3021894 584 * Helper function that notifies all registered handlers of an occurrence
elessair 0:f269e3021894 585 * of an update event. This function is meant to be called from the
elessair 0:f269e3021894 586 * BLE stack specific implementation when an update event occurs.
elessair 0:f269e3021894 587 *
elessair 0:f269e3021894 588 * @param[in] params
elessair 0:f269e3021894 589 * The update event parameters passed to the registered
elessair 0:f269e3021894 590 * handlers.
elessair 0:f269e3021894 591 */
elessair 0:f269e3021894 592 void processHVXEvent(const GattHVXCallbackParams *params) {
elessair 0:f269e3021894 593 if (onHVXCallbackChain) {
elessair 0:f269e3021894 594 onHVXCallbackChain(params);
elessair 0:f269e3021894 595 }
elessair 0:f269e3021894 596 }
elessair 0:f269e3021894 597
elessair 0:f269e3021894 598 protected:
elessair 0:f269e3021894 599 /**
elessair 0:f269e3021894 600 * Callchain containing all registered callback handlers for data read
elessair 0:f269e3021894 601 * events.
elessair 0:f269e3021894 602 */
elessair 0:f269e3021894 603 ReadCallbackChain_t onDataReadCallbackChain;
elessair 0:f269e3021894 604 /**
elessair 0:f269e3021894 605 * Callchain containing all registered callback handlers for data write
elessair 0:f269e3021894 606 * events.
elessair 0:f269e3021894 607 */
elessair 0:f269e3021894 608 WriteCallbackChain_t onDataWriteCallbackChain;
elessair 0:f269e3021894 609 /**
elessair 0:f269e3021894 610 * Callchain containing all registered callback handlers for update
elessair 0:f269e3021894 611 * events.
elessair 0:f269e3021894 612 */
elessair 0:f269e3021894 613 HVXCallbackChain_t onHVXCallbackChain;
elessair 0:f269e3021894 614 /**
elessair 0:f269e3021894 615 * Callchain containing all registered callback handlers for shutdown
elessair 0:f269e3021894 616 * events.
elessair 0:f269e3021894 617 */
elessair 0:f269e3021894 618 GattClientShutdownCallbackChain_t shutdownCallChain;
elessair 0:f269e3021894 619
elessair 0:f269e3021894 620 private:
elessair 0:f269e3021894 621 /* Disallow copy and assignment. */
elessair 0:f269e3021894 622 GattClient(const GattClient &);
elessair 0:f269e3021894 623 GattClient& operator=(const GattClient &);
elessair 0:f269e3021894 624 };
elessair 0:f269e3021894 625
elessair 0:f269e3021894 626 #endif /* ifndef __GATT_CLIENT_H__ */