Alex Cordonnier / BLE_API

High level Bluetooth Low Energy API and radio abstraction layer

Fork of BLE_API by Bluetooth Low Energy

ble/GattClient.h@720:ce8a760a4504, 2015-07-02 (annotated)

Committer:
rgrover1
Date:
Thu Jul 02 09:06:12 2015 +0100
Revision:
720:ce8a760a4504
Parent:
719:5f5c3812ea8f
Child:
725:f4a355b35cf8
Synchronized with git rev 2d594048

Author: Rohit Grover

#49: replace DiscoveredCharacteristic::setupOnDataRead() with GattClient::onDataRead()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 716:11b41f651697 1 /* mbed Microcontroller Library
rgrover1 716:11b41f651697 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 716:11b41f651697 3 *
rgrover1 716:11b41f651697 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 716:11b41f651697 5 * you may not use this file except in compliance with the License.
rgrover1 716:11b41f651697 6 * You may obtain a copy of the License at
rgrover1 716:11b41f651697 7 *
rgrover1 716:11b41f651697 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 716:11b41f651697 9 *
rgrover1 716:11b41f651697 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 716:11b41f651697 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 716:11b41f651697 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 716:11b41f651697 13 * See the License for the specific language governing permissions and
rgrover1 716:11b41f651697 14 * limitations under the License.
rgrover1 716:11b41f651697 15 */
rgrover1 716:11b41f651697 16
rgrover1 716:11b41f651697 17 #ifndef __GATT_CLIENT_H__
rgrover1 716:11b41f651697 18 #define __GATT_CLIENT_H__
rgrover1 716:11b41f651697 19
rgrover1 716:11b41f651697 20 #include "Gap.h"
rgrover1 716:11b41f651697 21 #include "GattAttribute.h"
rgrover1 716:11b41f651697 22 #include "ServiceDiscovery.h"
rgrover1 716:11b41f651697 23
rgrover1 716:11b41f651697 24 #include "GattCallbackParamTypes.h"
rgrover1 716:11b41f651697 25
rgrover1 716:11b41f651697 26 class GattClient {
rgrover1 716:11b41f651697 27 public:
rgrover1 716:11b41f651697 28 typedef void (*ReadCallback_t)(const GattReadCallbackParams *params);
rgrover1 716:11b41f651697 29
rgrover1 716:11b41f651697 30 enum WriteOp_t {
rgrover1 719:5f5c3812ea8f 31 GATT_OP_WRITE_REQ = 0x01, /**< Write Request. */
rgrover1 719:5f5c3812ea8f 32 GATT_OP_WRITE_CMD = 0x02, /**< Write Command. */
rgrover1 716:11b41f651697 33 };
rgrover1 716:11b41f651697 34
rgrover1 716:11b41f651697 35 typedef void (*WriteCallback_t)(const GattWriteCallbackParams *params);
rgrover1 716:11b41f651697 36
rgrover1 716:11b41f651697 37 /*
rgrover1 716:11b41f651697 38 * The following functions are meant to be overridden in the platform-specific sub-class.
rgrover1 716:11b41f651697 39 */
rgrover1 716:11b41f651697 40 public:
rgrover1 716:11b41f651697 41 /**
rgrover1 719:5f5c3812ea8f 42 * Launch service discovery. Once launched, application callbacks will be
rgrover1 719:5f5c3812ea8f 43 * invoked for matching services/characteristics. isServiceDiscoveryActive()
rgrover1 719:5f5c3812ea8f 44 * can be used to determine status; and a termination callback (if setup)
rgrover1 719:5f5c3812ea8f 45 * will be invoked at the end. Service discovery can be terminated prematurely
rgrover1 719:5f5c3812ea8f 46 * if needed using terminateServiceDiscovery().
rgrover1 716:11b41f651697 47 *
rgrover1 716:11b41f651697 48 * @param connectionHandle
rgrover1 716:11b41f651697 49 * Handle for the connection with the peer.
rgrover1 716:11b41f651697 50 * @param sc
rgrover1 716:11b41f651697 51 * This is the application callback for matching service. Taken as
rgrover1 716:11b41f651697 52 * NULL by default. Note: service discovery may still be active
rgrover1 716:11b41f651697 53 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 716:11b41f651697 54 * APIs from within this application callback might cause the
rgrover1 716:11b41f651697 55 * stack to abort service discovery. If this becomes an issue, it
rgrover1 716:11b41f651697 56 * may be better to make local copy of the discoveredService and
rgrover1 716:11b41f651697 57 * wait for service discovery to terminate before operating on the
rgrover1 716:11b41f651697 58 * service.
rgrover1 716:11b41f651697 59 * @param cc
rgrover1 716:11b41f651697 60 * This is the application callback for matching characteristic.
rgrover1 716:11b41f651697 61 * Taken as NULL by default. Note: service discovery may still be
rgrover1 716:11b41f651697 62 * active when this callback is issued; calling asynchronous
rgrover1 716:11b41f651697 63 * BLE-stack APIs from within this application callback might cause
rgrover1 716:11b41f651697 64 * the stack to abort service discovery. If this becomes an issue,
rgrover1 716:11b41f651697 65 * it may be better to make local copy of the discoveredCharacteristic
rgrover1 716:11b41f651697 66 * and wait for service discovery to terminate before operating on the
rgrover1 716:11b41f651697 67 * characteristic.
rgrover1 716:11b41f651697 68 * @param matchingServiceUUID
rgrover1 716:11b41f651697 69 * UUID based filter for specifying a service in which the application is
rgrover1 716:11b41f651697 70 * interested. By default it is set as the wildcard UUID_UNKNOWN,
rgrover1 716:11b41f651697 71 * in which case it matches all services. If characteristic-UUID
rgrover1 716:11b41f651697 72 * filter (below) is set to the wildcard value, then a service
rgrover1 716:11b41f651697 73 * callback will be invoked for the matching service (or for every
rgrover1 716:11b41f651697 74 * service if the service filter is a wildcard).
rgrover1 716:11b41f651697 75 * @param matchingCharacteristicUUIDIn
rgrover1 716:11b41f651697 76 * UUID based filter for specifying characteristic in which the application
rgrover1 716:11b41f651697 77 * is interested. By default it is set as the wildcard UUID_UKNOWN
rgrover1 716:11b41f651697 78 * to match against any characteristic. If both service-UUID
rgrover1 716:11b41f651697 79 * filter and characteristic-UUID filter are used with non- wildcard
rgrover1 716:11b41f651697 80 * values, then only a single characteristic callback is
rgrover1 716:11b41f651697 81 * invoked for the matching characteristic.
rgrover1 716:11b41f651697 82 *
rgrover1 716:11b41f651697 83 * @note Using wildcard values for both service-UUID and characteristic-
rgrover1 716:11b41f651697 84 * UUID will result in complete service discovery--callbacks being
rgrover1 716:11b41f651697 85 * called for every service and characteristic.
rgrover1 716:11b41f651697 86 *
rgrover1 716:11b41f651697 87 * @note Providing NULL for the characteristic callback will result in
rgrover1 716:11b41f651697 88 * characteristic discovery being skipped for each matching
rgrover1 716:11b41f651697 89 * service. This allows for an inexpensive method to discover only
rgrover1 716:11b41f651697 90 * services.
rgrover1 716:11b41f651697 91 *
rgrover1 716:11b41f651697 92 * @return
rgrover1 716:11b41f651697 93 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 716:11b41f651697 94 */
rgrover1 716:11b41f651697 95 virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle,
rgrover1 716:11b41f651697 96 ServiceDiscovery::ServiceCallback_t sc = NULL,
rgrover1 716:11b41f651697 97 ServiceDiscovery::CharacteristicCallback_t cc = NULL,
rgrover1 716:11b41f651697 98 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
rgrover1 716:11b41f651697 99 const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
rgrover1 716:11b41f651697 100 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 101 }
rgrover1 716:11b41f651697 102
rgrover1 716:11b41f651697 103 /**
rgrover1 716:11b41f651697 104 * Launch service discovery for services. Once launched, service discovery will remain
rgrover1 716:11b41f651697 105 * active with service-callbacks being issued back into the application for matching
rgrover1 716:11b41f651697 106 * services. isServiceDiscoveryActive() can be used to
rgrover1 716:11b41f651697 107 * determine status; and a termination callback (if setup) will be invoked
rgrover1 716:11b41f651697 108 * at the end. Service discovery can be terminated prematurely if needed
rgrover1 716:11b41f651697 109 * using terminateServiceDiscovery().
rgrover1 716:11b41f651697 110 *
rgrover1 716:11b41f651697 111 * @param connectionHandle
rgrover1 716:11b41f651697 112 * Handle for the connection with the peer.
rgrover1 716:11b41f651697 113 * @param sc
rgrover1 716:11b41f651697 114 * This is the application callback for matching service. Note: service discovery may still be active
rgrover1 716:11b41f651697 115 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 716:11b41f651697 116 * APIs from within this application callback might cause the
rgrover1 716:11b41f651697 117 * stack to abort service discovery. If this becomes an issue, it
rgrover1 716:11b41f651697 118 * may be better to make local copy of the discoveredService and
rgrover1 716:11b41f651697 119 * wait for service discovery to terminate before operating on the
rgrover1 716:11b41f651697 120 * service.
rgrover1 716:11b41f651697 121 * @param matchingServiceUUID
rgrover1 716:11b41f651697 122 * UUID based filter for specifying a service in which the application is
rgrover1 716:11b41f651697 123 * interested. By default it is set as the wildcard UUID_UNKNOWN,
rgrover1 716:11b41f651697 124 * in which case it matches all services.
rgrover1 716:11b41f651697 125 *
rgrover1 716:11b41f651697 126 * @return
rgrover1 716:11b41f651697 127 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 716:11b41f651697 128 */
rgrover1 716:11b41f651697 129 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
rgrover1 716:11b41f651697 130 ServiceDiscovery::ServiceCallback_t callback,
rgrover1 716:11b41f651697 131 const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) {
rgrover1 716:11b41f651697 132 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 133 }
rgrover1 716:11b41f651697 134
rgrover1 716:11b41f651697 135 /**
rgrover1 716:11b41f651697 136 * Launch service discovery for services. Once launched, service discovery will remain
rgrover1 716:11b41f651697 137 * active with service-callbacks being issued back into the application for matching
rgrover1 716:11b41f651697 138 * services. isServiceDiscoveryActive() can be used to
rgrover1 716:11b41f651697 139 * determine status; and a termination callback (if setup) will be invoked
rgrover1 716:11b41f651697 140 * at the end. Service discovery can be terminated prematurely if needed
rgrover1 716:11b41f651697 141 * using terminateServiceDiscovery().
rgrover1 716:11b41f651697 142 *
rgrover1 716:11b41f651697 143 * @param connectionHandle
rgrover1 716:11b41f651697 144 * Handle for the connection with the peer.
rgrover1 716:11b41f651697 145 * @param sc
rgrover1 716:11b41f651697 146 * This is the application callback for matching service. Note: service discovery may still be active
rgrover1 716:11b41f651697 147 * when this callback is issued; calling asynchronous BLE-stack
rgrover1 716:11b41f651697 148 * APIs from within this application callback might cause the
rgrover1 716:11b41f651697 149 * stack to abort service discovery. If this becomes an issue, it
rgrover1 716:11b41f651697 150 * may be better to make local copy of the discoveredService and
rgrover1 716:11b41f651697 151 * wait for service discovery to terminate before operating on the
rgrover1 716:11b41f651697 152 * service.
rgrover1 716:11b41f651697 153 * @param startHandle, endHandle
rgrover1 716:11b41f651697 154 * Handle range within which to limit the search
rgrover1 716:11b41f651697 155 *
rgrover1 716:11b41f651697 156 * @return
rgrover1 716:11b41f651697 157 * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
rgrover1 716:11b41f651697 158 */
rgrover1 716:11b41f651697 159 virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle,
rgrover1 716:11b41f651697 160 ServiceDiscovery::ServiceCallback_t callback,
rgrover1 716:11b41f651697 161 GattAttribute::Handle_t startHandle,
rgrover1 716:11b41f651697 162 GattAttribute::Handle_t endHandle) {
rgrover1 716:11b41f651697 163 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 164 }
rgrover1 716:11b41f651697 165
rgrover1 716:11b41f651697 166 /**
rgrover1 716:11b41f651697 167 * Is service-discovery currently active?
rgrover1 716:11b41f651697 168 */
rgrover1 716:11b41f651697 169 virtual bool isServiceDiscoveryActive(void) const {
rgrover1 716:11b41f651697 170 return false; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 171 }
rgrover1 716:11b41f651697 172
rgrover1 716:11b41f651697 173 /**
rgrover1 716:11b41f651697 174 * Terminate an ongoing service-discovery. This should result in an
rgrover1 716:11b41f651697 175 * invocation of the TerminationCallback if service-discovery is active.
rgrover1 716:11b41f651697 176 */
rgrover1 716:11b41f651697 177 virtual void terminateServiceDiscovery(void) {
rgrover1 716:11b41f651697 178 /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 179 }
rgrover1 716:11b41f651697 180
rgrover1 716:11b41f651697 181 /* Initiate a Gatt Client read procedure by attribute-handle. */
rgrover1 716:11b41f651697 182 virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
rgrover1 716:11b41f651697 183 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 184 }
rgrover1 716:11b41f651697 185
rgrover1 716:11b41f651697 186 /**
rgrover1 716:11b41f651697 187 * Initiate a GATT Client write procedure.
rgrover1 716:11b41f651697 188 *
rgrover1 716:11b41f651697 189 * @param[in] cmd
rgrover1 716:11b41f651697 190 * Command can be either a write-request (which generates a
rgrover1 716:11b41f651697 191 * matching response from the peripheral), or a write-command,
rgrover1 716:11b41f651697 192 * which doesn't require the connected peer to respond.
rgrover1 716:11b41f651697 193 * @param[in] connHandle
rgrover1 716:11b41f651697 194 * Connection handle.
rgrover1 716:11b41f651697 195 * @param[in] attributeHandle
rgrover1 716:11b41f651697 196 * handle for the target attribtue on the remote GATT server.
rgrover1 716:11b41f651697 197 * @param[in] length
rgrover1 716:11b41f651697 198 * length of the new value.
rgrover1 716:11b41f651697 199 * @param[in] value
rgrover1 716:11b41f651697 200 * new value being written.
rgrover1 716:11b41f651697 201 */
rgrover1 716:11b41f651697 202 virtual ble_error_t write(GattClient::WriteOp_t cmd,
rgrover1 716:11b41f651697 203 Gap::Handle_t connHandle,
rgrover1 716:11b41f651697 204 GattAttribute::Handle_t attributeHandle,
rgrover1 716:11b41f651697 205 size_t length,
rgrover1 716:11b41f651697 206 const uint8_t *value) const {
rgrover1 716:11b41f651697 207 return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 208 }
rgrover1 716:11b41f651697 209
rgrover1 720:ce8a760a4504 210 /* Event callback handlers. */
rgrover1 720:ce8a760a4504 211 public:
rgrover1 720:ce8a760a4504 212 /**
rgrover1 720:ce8a760a4504 213 * Setup a callback for read response events.
rgrover1 720:ce8a760a4504 214 */
rgrover1 720:ce8a760a4504 215 void onDataRead(ReadCallback_t callback) {
rgrover1 720:ce8a760a4504 216 onDataReadCallback = callback;
rgrover1 720:ce8a760a4504 217 }
rgrover1 720:ce8a760a4504 218
rgrover1 720:ce8a760a4504 219 /**
rgrover1 720:ce8a760a4504 220 * Setup a callback for write response events.
rgrover1 720:ce8a760a4504 221 * @Note: write commands (issued using writeWoResponse) don't generate a response.
rgrover1 720:ce8a760a4504 222 */
rgrover1 720:ce8a760a4504 223 void onDataWrite(WriteCallback_t callback) {
rgrover1 720:ce8a760a4504 224 onDataWriteCallback = callback;
rgrover1 720:ce8a760a4504 225 }
rgrover1 720:ce8a760a4504 226
rgrover1 716:11b41f651697 227 /**
rgrover1 716:11b41f651697 228 * Setup callback for when serviceDiscovery terminates.
rgrover1 716:11b41f651697 229 */
rgrover1 716:11b41f651697 230 virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
rgrover1 716:11b41f651697 231 /* default implementation; override this API if this capability is supported. */
rgrover1 716:11b41f651697 232 }
rgrover1 716:11b41f651697 233
rgrover1 716:11b41f651697 234 protected:
rgrover1 716:11b41f651697 235 GattClient() {
rgrover1 716:11b41f651697 236 /* empty */
rgrover1 716:11b41f651697 237 }
rgrover1 716:11b41f651697 238
rgrover1 720:ce8a760a4504 239 /* Entry points for the underlying stack to report events back to the user. */
rgrover1 720:ce8a760a4504 240 public:
rgrover1 720:ce8a760a4504 241 void processReadResponse(const GattReadCallbackParams *params) {
rgrover1 720:ce8a760a4504 242 if (onDataReadCallback) {
rgrover1 720:ce8a760a4504 243 onDataReadCallback(params);
rgrover1 720:ce8a760a4504 244 }
rgrover1 720:ce8a760a4504 245 }
rgrover1 720:ce8a760a4504 246
rgrover1 720:ce8a760a4504 247 void processWriteResponse(const GattWriteCallbackParams *params) {
rgrover1 720:ce8a760a4504 248 if (onDataWriteCallback) {
rgrover1 720:ce8a760a4504 249 onDataWriteCallback(params);
rgrover1 720:ce8a760a4504 250 }
rgrover1 720:ce8a760a4504 251 }
rgrover1 720:ce8a760a4504 252
rgrover1 720:ce8a760a4504 253 protected:
rgrover1 720:ce8a760a4504 254 ReadCallback_t onDataReadCallback;
rgrover1 720:ce8a760a4504 255 WriteCallback_t onDataWriteCallback;
rgrover1 720:ce8a760a4504 256
rgrover1 716:11b41f651697 257 private:
rgrover1 716:11b41f651697 258 /* disallow copy and assignment */
rgrover1 716:11b41f651697 259 GattClient(const GattClient &);
rgrover1 716:11b41f651697 260 GattClient& operator=(const GattClient &);
rgrover1 716:11b41f651697 261 };
rgrover1 716:11b41f651697 262
rgrover1 716:11b41f651697 263 #endif // ifndef __GATT_CLIENT_H__