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ble/GattClient.h@716:11b41f651697, 2015-07-02 (annotated)
- Committer:
- rgrover1
- Date:
- Thu Jul 02 09:06:11 2015 +0100
- Revision:
- 716:11b41f651697
- Child:
- 719:5f5c3812ea8f
Synchronized with git rev d80fec88
Author: Rohit Grover
Release 0.4.0
=============
This is a major release which introduces the GATT Client functionality. It
also aligns BLE_API with builds using our new package manager: yotta
(https://github.com/armmbed/yotta).
Many APIs have seen some redesign. We encourage our users to pay attention to
the changes and migrate appropriately over time. We've also taken care to
ensure that existing code continues to work the same way. There's more
documentation in the form of comment headers for APIs to explain proper usage;
in many cases comment headers suggest alternative use of APIs.
Enhancements
~~~~~~~~~~~~
* Introduce GattClient. This includes functionality for service-discovery,
connections, and attribute-reads and writes. You'll find a demo program for
LEDBlinker on the mbed.org Bluetooth team page to use the new APIs. Some of
the GATT client functionality hasn't been implemented yet, but the APIs have
been added.
* Most APIs in the abstract base classes like Gap and GattServer return
BLE_ERROR_NOT_IMPLEMENTED. Previously many APIs were pure-virtual, which did
not permit partial ports to compile.
* We've added a new abstract base class for SecurityManager. All security
related APIs have been moved into that.
* BLEDevice has been renamed as BLE. A deprecated alias for BLEDevice is
available to support existing code.
* There has been a major cleanup of APIs under BLE. APIs have now been
categorized as belonging to Gap, GattServer, GattClient, or SecurityManager.
There are accessors to get references for Gap, GattServer, GattClient, and
SecurityManager. A former call to ble.setAddress(...) is now expected to be
achieved with ble.gap().setAddress(...).
* We've cleaned up our APIs, and this has resulted in dropping some APIs like
BLE::reset().
* We've also dropped GattServer::initializeGattDatabase(). THis was added at
some point to support controllers where a commit point was needed to
indicate when the application had finished constructing the GATT database.
This API would get called internally before Gap::startAdvertising(). We now
expect the underlying port to do the equivalent of initializeGattDatabase()
implicitly upon Gap::startAdvertising().
* The callback for BLE.onTimeout() now receives a TimeoutSource_t to indicate
the cause of the timeout. This is perhaps the only breaking API change. We
expect it to have very little disruptive effect.
* We've added a version of Gap::disconnect() which takes a connection handle.
The previous API (which did not take a connection handle) has been
deprecated; it will still work for situations where there's only a single
active connection. We hold on to that API to allow existing code to migrate
to the new API.
Bugfixes
~~~~~~~~
* None.
Who changed what in which revision?
User | Revision | Line number | New 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 | 716:11b41f651697 | 31 | GATT_OP_WRITE_REQ = 0x01, /**< Write Request. */ |
rgrover1 | 716:11b41f651697 | 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 | 716:11b41f651697 | 42 | * Launch service discovery. Once launched, service discovery will remain |
rgrover1 | 716:11b41f651697 | 43 | * active with callbacks being issued back into the application for matching |
rgrover1 | 716:11b41f651697 | 44 | * services/characteristics. isServiceDiscoveryActive() can be used to |
rgrover1 | 716:11b41f651697 | 45 | * determine status; and a termination callback (if setup) will be invoked |
rgrover1 | 716:11b41f651697 | 46 | * at the end. Service discovery can be terminated prematurely if needed |
rgrover1 | 716:11b41f651697 | 47 | * using terminateServiceDiscovery(). |
rgrover1 | 716:11b41f651697 | 48 | * |
rgrover1 | 716:11b41f651697 | 49 | * @param connectionHandle |
rgrover1 | 716:11b41f651697 | 50 | * Handle for the connection with the peer. |
rgrover1 | 716:11b41f651697 | 51 | * @param sc |
rgrover1 | 716:11b41f651697 | 52 | * This is the application callback for matching service. Taken as |
rgrover1 | 716:11b41f651697 | 53 | * NULL by default. Note: service discovery may still be active |
rgrover1 | 716:11b41f651697 | 54 | * when this callback is issued; calling asynchronous BLE-stack |
rgrover1 | 716:11b41f651697 | 55 | * APIs from within this application callback might cause the |
rgrover1 | 716:11b41f651697 | 56 | * stack to abort service discovery. If this becomes an issue, it |
rgrover1 | 716:11b41f651697 | 57 | * may be better to make local copy of the discoveredService and |
rgrover1 | 716:11b41f651697 | 58 | * wait for service discovery to terminate before operating on the |
rgrover1 | 716:11b41f651697 | 59 | * service. |
rgrover1 | 716:11b41f651697 | 60 | * @param cc |
rgrover1 | 716:11b41f651697 | 61 | * This is the application callback for matching characteristic. |
rgrover1 | 716:11b41f651697 | 62 | * Taken as NULL by default. Note: service discovery may still be |
rgrover1 | 716:11b41f651697 | 63 | * active when this callback is issued; calling asynchronous |
rgrover1 | 716:11b41f651697 | 64 | * BLE-stack APIs from within this application callback might cause |
rgrover1 | 716:11b41f651697 | 65 | * the stack to abort service discovery. If this becomes an issue, |
rgrover1 | 716:11b41f651697 | 66 | * it may be better to make local copy of the discoveredCharacteristic |
rgrover1 | 716:11b41f651697 | 67 | * and wait for service discovery to terminate before operating on the |
rgrover1 | 716:11b41f651697 | 68 | * characteristic. |
rgrover1 | 716:11b41f651697 | 69 | * @param matchingServiceUUID |
rgrover1 | 716:11b41f651697 | 70 | * UUID based filter for specifying a service in which the application is |
rgrover1 | 716:11b41f651697 | 71 | * interested. By default it is set as the wildcard UUID_UNKNOWN, |
rgrover1 | 716:11b41f651697 | 72 | * in which case it matches all services. If characteristic-UUID |
rgrover1 | 716:11b41f651697 | 73 | * filter (below) is set to the wildcard value, then a service |
rgrover1 | 716:11b41f651697 | 74 | * callback will be invoked for the matching service (or for every |
rgrover1 | 716:11b41f651697 | 75 | * service if the service filter is a wildcard). |
rgrover1 | 716:11b41f651697 | 76 | * @param matchingCharacteristicUUIDIn |
rgrover1 | 716:11b41f651697 | 77 | * UUID based filter for specifying characteristic in which the application |
rgrover1 | 716:11b41f651697 | 78 | * is interested. By default it is set as the wildcard UUID_UKNOWN |
rgrover1 | 716:11b41f651697 | 79 | * to match against any characteristic. If both service-UUID |
rgrover1 | 716:11b41f651697 | 80 | * filter and characteristic-UUID filter are used with non- wildcard |
rgrover1 | 716:11b41f651697 | 81 | * values, then only a single characteristic callback is |
rgrover1 | 716:11b41f651697 | 82 | * invoked for the matching characteristic. |
rgrover1 | 716:11b41f651697 | 83 | * |
rgrover1 | 716:11b41f651697 | 84 | * @note Using wildcard values for both service-UUID and characteristic- |
rgrover1 | 716:11b41f651697 | 85 | * UUID will result in complete service discovery--callbacks being |
rgrover1 | 716:11b41f651697 | 86 | * called for every service and characteristic. |
rgrover1 | 716:11b41f651697 | 87 | * |
rgrover1 | 716:11b41f651697 | 88 | * @note Providing NULL for the characteristic callback will result in |
rgrover1 | 716:11b41f651697 | 89 | * characteristic discovery being skipped for each matching |
rgrover1 | 716:11b41f651697 | 90 | * service. This allows for an inexpensive method to discover only |
rgrover1 | 716:11b41f651697 | 91 | * services. |
rgrover1 | 716:11b41f651697 | 92 | * |
rgrover1 | 716:11b41f651697 | 93 | * @return |
rgrover1 | 716:11b41f651697 | 94 | * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error. |
rgrover1 | 716:11b41f651697 | 95 | */ |
rgrover1 | 716:11b41f651697 | 96 | virtual ble_error_t launchServiceDiscovery(Gap::Handle_t connectionHandle, |
rgrover1 | 716:11b41f651697 | 97 | ServiceDiscovery::ServiceCallback_t sc = NULL, |
rgrover1 | 716:11b41f651697 | 98 | ServiceDiscovery::CharacteristicCallback_t cc = NULL, |
rgrover1 | 716:11b41f651697 | 99 | const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN), |
rgrover1 | 716:11b41f651697 | 100 | const UUID &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) { |
rgrover1 | 716:11b41f651697 | 101 | return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 102 | } |
rgrover1 | 716:11b41f651697 | 103 | |
rgrover1 | 716:11b41f651697 | 104 | /** |
rgrover1 | 716:11b41f651697 | 105 | * Launch service discovery for services. Once launched, service discovery will remain |
rgrover1 | 716:11b41f651697 | 106 | * active with service-callbacks being issued back into the application for matching |
rgrover1 | 716:11b41f651697 | 107 | * services. isServiceDiscoveryActive() can be used to |
rgrover1 | 716:11b41f651697 | 108 | * determine status; and a termination callback (if setup) will be invoked |
rgrover1 | 716:11b41f651697 | 109 | * at the end. Service discovery can be terminated prematurely if needed |
rgrover1 | 716:11b41f651697 | 110 | * using terminateServiceDiscovery(). |
rgrover1 | 716:11b41f651697 | 111 | * |
rgrover1 | 716:11b41f651697 | 112 | * @param connectionHandle |
rgrover1 | 716:11b41f651697 | 113 | * Handle for the connection with the peer. |
rgrover1 | 716:11b41f651697 | 114 | * @param sc |
rgrover1 | 716:11b41f651697 | 115 | * This is the application callback for matching service. Note: service discovery may still be active |
rgrover1 | 716:11b41f651697 | 116 | * when this callback is issued; calling asynchronous BLE-stack |
rgrover1 | 716:11b41f651697 | 117 | * APIs from within this application callback might cause the |
rgrover1 | 716:11b41f651697 | 118 | * stack to abort service discovery. If this becomes an issue, it |
rgrover1 | 716:11b41f651697 | 119 | * may be better to make local copy of the discoveredService and |
rgrover1 | 716:11b41f651697 | 120 | * wait for service discovery to terminate before operating on the |
rgrover1 | 716:11b41f651697 | 121 | * service. |
rgrover1 | 716:11b41f651697 | 122 | * @param matchingServiceUUID |
rgrover1 | 716:11b41f651697 | 123 | * UUID based filter for specifying a service in which the application is |
rgrover1 | 716:11b41f651697 | 124 | * interested. By default it is set as the wildcard UUID_UNKNOWN, |
rgrover1 | 716:11b41f651697 | 125 | * in which case it matches all services. |
rgrover1 | 716:11b41f651697 | 126 | * |
rgrover1 | 716:11b41f651697 | 127 | * @return |
rgrover1 | 716:11b41f651697 | 128 | * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error. |
rgrover1 | 716:11b41f651697 | 129 | */ |
rgrover1 | 716:11b41f651697 | 130 | virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle, |
rgrover1 | 716:11b41f651697 | 131 | ServiceDiscovery::ServiceCallback_t callback, |
rgrover1 | 716:11b41f651697 | 132 | const UUID &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) { |
rgrover1 | 716:11b41f651697 | 133 | return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 134 | } |
rgrover1 | 716:11b41f651697 | 135 | |
rgrover1 | 716:11b41f651697 | 136 | /** |
rgrover1 | 716:11b41f651697 | 137 | * Launch service discovery for services. Once launched, service discovery will remain |
rgrover1 | 716:11b41f651697 | 138 | * active with service-callbacks being issued back into the application for matching |
rgrover1 | 716:11b41f651697 | 139 | * services. isServiceDiscoveryActive() can be used to |
rgrover1 | 716:11b41f651697 | 140 | * determine status; and a termination callback (if setup) will be invoked |
rgrover1 | 716:11b41f651697 | 141 | * at the end. Service discovery can be terminated prematurely if needed |
rgrover1 | 716:11b41f651697 | 142 | * using terminateServiceDiscovery(). |
rgrover1 | 716:11b41f651697 | 143 | * |
rgrover1 | 716:11b41f651697 | 144 | * @param connectionHandle |
rgrover1 | 716:11b41f651697 | 145 | * Handle for the connection with the peer. |
rgrover1 | 716:11b41f651697 | 146 | * @param sc |
rgrover1 | 716:11b41f651697 | 147 | * This is the application callback for matching service. Note: service discovery may still be active |
rgrover1 | 716:11b41f651697 | 148 | * when this callback is issued; calling asynchronous BLE-stack |
rgrover1 | 716:11b41f651697 | 149 | * APIs from within this application callback might cause the |
rgrover1 | 716:11b41f651697 | 150 | * stack to abort service discovery. If this becomes an issue, it |
rgrover1 | 716:11b41f651697 | 151 | * may be better to make local copy of the discoveredService and |
rgrover1 | 716:11b41f651697 | 152 | * wait for service discovery to terminate before operating on the |
rgrover1 | 716:11b41f651697 | 153 | * service. |
rgrover1 | 716:11b41f651697 | 154 | * @param startHandle, endHandle |
rgrover1 | 716:11b41f651697 | 155 | * Handle range within which to limit the search |
rgrover1 | 716:11b41f651697 | 156 | * |
rgrover1 | 716:11b41f651697 | 157 | * @return |
rgrover1 | 716:11b41f651697 | 158 | * BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error. |
rgrover1 | 716:11b41f651697 | 159 | */ |
rgrover1 | 716:11b41f651697 | 160 | virtual ble_error_t discoverServices(Gap::Handle_t connectionHandle, |
rgrover1 | 716:11b41f651697 | 161 | ServiceDiscovery::ServiceCallback_t callback, |
rgrover1 | 716:11b41f651697 | 162 | GattAttribute::Handle_t startHandle, |
rgrover1 | 716:11b41f651697 | 163 | GattAttribute::Handle_t endHandle) { |
rgrover1 | 716:11b41f651697 | 164 | return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 165 | } |
rgrover1 | 716:11b41f651697 | 166 | |
rgrover1 | 716:11b41f651697 | 167 | /** |
rgrover1 | 716:11b41f651697 | 168 | * Is service-discovery currently active? |
rgrover1 | 716:11b41f651697 | 169 | */ |
rgrover1 | 716:11b41f651697 | 170 | virtual bool isServiceDiscoveryActive(void) const { |
rgrover1 | 716:11b41f651697 | 171 | return false; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 172 | } |
rgrover1 | 716:11b41f651697 | 173 | |
rgrover1 | 716:11b41f651697 | 174 | /** |
rgrover1 | 716:11b41f651697 | 175 | * Terminate an ongoing service-discovery. This should result in an |
rgrover1 | 716:11b41f651697 | 176 | * invocation of the TerminationCallback if service-discovery is active. |
rgrover1 | 716:11b41f651697 | 177 | */ |
rgrover1 | 716:11b41f651697 | 178 | virtual void terminateServiceDiscovery(void) { |
rgrover1 | 716:11b41f651697 | 179 | /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 180 | } |
rgrover1 | 716:11b41f651697 | 181 | |
rgrover1 | 716:11b41f651697 | 182 | /* Initiate a Gatt Client read procedure by attribute-handle. */ |
rgrover1 | 716:11b41f651697 | 183 | virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const { |
rgrover1 | 716:11b41f651697 | 184 | return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 185 | } |
rgrover1 | 716:11b41f651697 | 186 | |
rgrover1 | 716:11b41f651697 | 187 | /** |
rgrover1 | 716:11b41f651697 | 188 | * Initiate a GATT Client write procedure. |
rgrover1 | 716:11b41f651697 | 189 | * |
rgrover1 | 716:11b41f651697 | 190 | * @param[in] cmd |
rgrover1 | 716:11b41f651697 | 191 | * Command can be either a write-request (which generates a |
rgrover1 | 716:11b41f651697 | 192 | * matching response from the peripheral), or a write-command, |
rgrover1 | 716:11b41f651697 | 193 | * which doesn't require the connected peer to respond. |
rgrover1 | 716:11b41f651697 | 194 | * @param[in] connHandle |
rgrover1 | 716:11b41f651697 | 195 | * Connection handle. |
rgrover1 | 716:11b41f651697 | 196 | * @param[in] attributeHandle |
rgrover1 | 716:11b41f651697 | 197 | * handle for the target attribtue on the remote GATT server. |
rgrover1 | 716:11b41f651697 | 198 | * @param[in] length |
rgrover1 | 716:11b41f651697 | 199 | * length of the new value. |
rgrover1 | 716:11b41f651697 | 200 | * @param[in] value |
rgrover1 | 716:11b41f651697 | 201 | * new value being written. |
rgrover1 | 716:11b41f651697 | 202 | */ |
rgrover1 | 716:11b41f651697 | 203 | virtual ble_error_t write(GattClient::WriteOp_t cmd, |
rgrover1 | 716:11b41f651697 | 204 | Gap::Handle_t connHandle, |
rgrover1 | 716:11b41f651697 | 205 | GattAttribute::Handle_t attributeHandle, |
rgrover1 | 716:11b41f651697 | 206 | size_t length, |
rgrover1 | 716:11b41f651697 | 207 | const uint8_t *value) const { |
rgrover1 | 716:11b41f651697 | 208 | return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 209 | } |
rgrover1 | 716:11b41f651697 | 210 | |
rgrover1 | 716:11b41f651697 | 211 | /** |
rgrover1 | 716:11b41f651697 | 212 | * Setup callback for when serviceDiscovery terminates. |
rgrover1 | 716:11b41f651697 | 213 | */ |
rgrover1 | 716:11b41f651697 | 214 | virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) { |
rgrover1 | 716:11b41f651697 | 215 | /* default implementation; override this API if this capability is supported. */ |
rgrover1 | 716:11b41f651697 | 216 | } |
rgrover1 | 716:11b41f651697 | 217 | |
rgrover1 | 716:11b41f651697 | 218 | protected: |
rgrover1 | 716:11b41f651697 | 219 | GattClient() { |
rgrover1 | 716:11b41f651697 | 220 | /* empty */ |
rgrover1 | 716:11b41f651697 | 221 | } |
rgrover1 | 716:11b41f651697 | 222 | |
rgrover1 | 716:11b41f651697 | 223 | private: |
rgrover1 | 716:11b41f651697 | 224 | /* disallow copy and assignment */ |
rgrover1 | 716:11b41f651697 | 225 | GattClient(const GattClient &); |
rgrover1 | 716:11b41f651697 | 226 | GattClient& operator=(const GattClient &); |
rgrover1 | 716:11b41f651697 | 227 | }; |
rgrover1 | 716:11b41f651697 | 228 | |
rgrover1 | 716:11b41f651697 | 229 | #endif // ifndef __GATT_CLIENT_H__ |