Bkap / BLE_API

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public/GattServer.h@548:623e4c0f0b6e, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:52:09 2015 +0100
Revision:
548:623e4c0f0b6e
Parent:
547:f84c514eee35
Child:
550:35b3962903af
Synchronized with git rev 962533e3

Author: Rohit Grover

fix GattServer::onDataWritten()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 258:85de85adfac7 1 /* mbed Microcontroller Library
rgrover1 258:85de85adfac7 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 258:85de85adfac7 3 *
rgrover1 258:85de85adfac7 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 258:85de85adfac7 5 * you may not use this file except in compliance with the License.
rgrover1 258:85de85adfac7 6 * You may obtain a copy of the License at
rgrover1 258:85de85adfac7 7 *
rgrover1 258:85de85adfac7 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 258:85de85adfac7 9 *
rgrover1 258:85de85adfac7 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 258:85de85adfac7 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 258:85de85adfac7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 258:85de85adfac7 13 * See the License for the specific language governing permissions and
rgrover1 258:85de85adfac7 14 * limitations under the License.
rgrover1 258:85de85adfac7 15 */
rgrover1 258:85de85adfac7 16
rgrover1 258:85de85adfac7 17 #ifndef __GATT_SERVER_H__
rgrover1 258:85de85adfac7 18 #define __GATT_SERVER_H__
rgrover1 258:85de85adfac7 19
rgrover1 340:c7684a5bc2e1 20 #include "Gap.h"
rgrover1 258:85de85adfac7 21 #include "GattService.h"
rgrover1 340:c7684a5bc2e1 22 #include "GattAttribute.h"
rgrover1 258:85de85adfac7 23 #include "GattServerEvents.h"
rgrover1 527:493185cebc03 24 #include "GattCallbackParamTypes.h"
rgrover1 258:85de85adfac7 25 #include "CallChainOfFunctionPointersWithContext.h"
rgrover1 258:85de85adfac7 26
rgrover1 258:85de85adfac7 27 class GattServer {
rgrover1 258:85de85adfac7 28 public:
rgrover1 258:85de85adfac7 29 /* Event callback handlers. */
rgrover1 376:47ff130c1d74 30 typedef void (*EventCallback_t)(GattAttribute::Handle_t attributeHandle);
rgrover1 258:85de85adfac7 31 typedef void (*ServerEventCallback_t)(void); /**< independent of any particular attribute */
rgrover1 258:85de85adfac7 32
rgrover1 258:85de85adfac7 33 protected:
rgrover1 263:73847e8b6025 34 GattServer() :
rgrover1 263:73847e8b6025 35 serviceCount(0),
rgrover1 263:73847e8b6025 36 characteristicCount(0),
rgrover1 547:f84c514eee35 37 dataSentCallChain(),
rgrover1 548:623e4c0f0b6e 38 dataWrittenCallChain(),
rgrover1 300:d9a39f759a6a 39 onDataRead(),
rgrover1 263:73847e8b6025 40 onUpdatesEnabled(NULL),
rgrover1 263:73847e8b6025 41 onUpdatesDisabled(NULL),
rgrover1 263:73847e8b6025 42 onConfirmationReceived(NULL) {
rgrover1 258:85de85adfac7 43 /* empty */
rgrover1 258:85de85adfac7 44 }
rgrover1 258:85de85adfac7 45
rgrover1 526:caa67c3187a0 46 public:
rgrover1 258:85de85adfac7 47 /* These functions must be defined in the sub-class */
rgrover1 539:0b6e82025358 48
rgrover1 539:0b6e82025358 49 /**
rgrover1 539:0b6e82025358 50 * Add a service declaration to the local server ATT table. Also add the
rgrover1 539:0b6e82025358 51 * characteristics contained within.
rgrover1 539:0b6e82025358 52 */
rgrover1 539:0b6e82025358 53 virtual ble_error_t addService(GattService &) = 0;
rgrover1 539:0b6e82025358 54
rgrover1 539:0b6e82025358 55 /**
rgrover1 539:0b6e82025358 56 * Read the value of a characteristic from the local GattServer
rgrover1 539:0b6e82025358 57 * @param[in] attributeHandle
rgrover1 539:0b6e82025358 58 * Attribute handle for the value attribute of the characteristic.
rgrover1 539:0b6e82025358 59 * @param[out] buffer
rgrover1 539:0b6e82025358 60 * A buffer to hold the value being read.
rgrover1 539:0b6e82025358 61 * @param[in/out] lengthP
rgrover1 539:0b6e82025358 62 * Length of the buffer being supplied. If the attribute
rgrover1 539:0b6e82025358 63 * value is longer than the size of the supplied buffer,
rgrover1 539:0b6e82025358 64 * this variable will hold upon return the total attribute value length
rgrover1 539:0b6e82025358 65 * (excluding offset). The application may use this
rgrover1 539:0b6e82025358 66 * information to allocate a suitable buffer size.
rgrover1 539:0b6e82025358 67 *
rgrover1 539:0b6e82025358 68 * @return BLE_ERROR_NONE if a value was read successfully into the buffer.
rgrover1 539:0b6e82025358 69 */
rgrover1 539:0b6e82025358 70 virtual ble_error_t read(GattAttribute::Handle_t attributeHandle, uint8_t buffer[], uint16_t *lengthP) = 0;
rgrover1 539:0b6e82025358 71
rgrover1 539:0b6e82025358 72 /**
rgrover1 539:0b6e82025358 73 * Read the value of a characteristic from the local GattServer
rgrover1 539:0b6e82025358 74 * @param[in] connectionHandle
rgrover1 539:0b6e82025358 75 * Connection Handle.
rgrover1 539:0b6e82025358 76 * @param[in] attributeHandle
rgrover1 539:0b6e82025358 77 * Attribute handle for the value attribute of the characteristic.
rgrover1 539:0b6e82025358 78 * @param[out] buffer
rgrover1 539:0b6e82025358 79 * A buffer to hold the value being read.
rgrover1 539:0b6e82025358 80 * @param[in/out] lengthP
rgrover1 539:0b6e82025358 81 * Length of the buffer being supplied. If the attribute
rgrover1 539:0b6e82025358 82 * value is longer than the size of the supplied buffer,
rgrover1 539:0b6e82025358 83 * this variable will hold upon return the total attribute value length
rgrover1 539:0b6e82025358 84 * (excluding offset). The application may use this
rgrover1 539:0b6e82025358 85 * information to allocate a suitable buffer size.
rgrover1 539:0b6e82025358 86 *
rgrover1 539:0b6e82025358 87 * @return BLE_ERROR_NONE if a value was read successfully into the buffer.
rgrover1 539:0b6e82025358 88 *
rgrover1 539:0b6e82025358 89 * @note This API is a version of above with an additional connection handle
rgrover1 539:0b6e82025358 90 * parameter to allow fetches for connection-specific multivalued
rgrover1 539:0b6e82025358 91 * attribtues (such as the CCCDs).
rgrover1 539:0b6e82025358 92 */
rgrover1 539:0b6e82025358 93 virtual ble_error_t read(Gap::Handle_t connectionHandle, GattAttribute::Handle_t attributeHandle, uint8_t *buffer, uint16_t *lengthP) = 0;
rgrover1 539:0b6e82025358 94
rgrover1 539:0b6e82025358 95 /**
rgrover1 539:0b6e82025358 96 * Update the value of a characteristic on the local GattServer.
rgrover1 539:0b6e82025358 97 *
rgrover1 539:0b6e82025358 98 * @param[in] attributeHandle
rgrover1 539:0b6e82025358 99 * Handle for the value attribute of the Characteristic.
rgrover1 539:0b6e82025358 100 * @param[in] value
rgrover1 539:0b6e82025358 101 * A pointer to a buffer holding the new value
rgrover1 539:0b6e82025358 102 * @param[in] size
rgrover1 539:0b6e82025358 103 * Size of the new value (in bytes).
rgrover1 539:0b6e82025358 104 * @param[in] localOnly
rgrover1 539:0b6e82025358 105 * Should this update be kept on the local
rgrover1 539:0b6e82025358 106 * GattServer regardless of the state of the
rgrover1 539:0b6e82025358 107 * notify/indicate flag in the CCCD for this
rgrover1 539:0b6e82025358 108 * Characteristic? If set to true, no notification
rgrover1 539:0b6e82025358 109 * or indication is generated.
rgrover1 539:0b6e82025358 110 *
rgrover1 539:0b6e82025358 111 * @return BLE_ERROR_NONE if we have successfully set the value of the attribute.
rgrover1 539:0b6e82025358 112 */
rgrover1 539:0b6e82025358 113 virtual ble_error_t write(GattAttribute::Handle_t, const uint8_t *, uint16_t, bool localOnly = false) = 0;
rgrover1 539:0b6e82025358 114
rgrover1 539:0b6e82025358 115 /**
rgrover1 539:0b6e82025358 116 * Update the value of a characteristic on the local GattServer. A version
rgrover1 539:0b6e82025358 117 * of the same as above with connection handle parameter to allow updates
rgrover1 539:0b6e82025358 118 * for connection-specific multivalued attribtues (such as the CCCDs).
rgrover1 539:0b6e82025358 119 *
rgrover1 539:0b6e82025358 120 * @param[in] connectionHandle
rgrover1 539:0b6e82025358 121 * Connection Handle.
rgrover1 539:0b6e82025358 122 * @param[in] attributeHandle
rgrover1 539:0b6e82025358 123 * Handle for the value attribute of the Characteristic.
rgrover1 539:0b6e82025358 124 * @param[in] value
rgrover1 539:0b6e82025358 125 * A pointer to a buffer holding the new value
rgrover1 539:0b6e82025358 126 * @param[in] size
rgrover1 539:0b6e82025358 127 * Size of the new value (in bytes).
rgrover1 539:0b6e82025358 128 * @param[in] localOnly
rgrover1 539:0b6e82025358 129 * Should this update be kept on the local
rgrover1 539:0b6e82025358 130 * GattServer regardless of the state of the
rgrover1 539:0b6e82025358 131 * notify/indicate flag in the CCCD for this
rgrover1 539:0b6e82025358 132 * Characteristic? If set to true, no notification
rgrover1 539:0b6e82025358 133 * or indication is generated.
rgrover1 539:0b6e82025358 134 *
rgrover1 539:0b6e82025358 135 * @return BLE_ERROR_NONE if we have successfully set the value of the attribute.
rgrover1 539:0b6e82025358 136 */
rgrover1 539:0b6e82025358 137 virtual ble_error_t write(Gap::Handle_t connectionHandle, GattAttribute::Handle_t, const uint8_t *, uint16_t, bool localOnly = false) = 0;
rgrover1 539:0b6e82025358 138
rgrover1 539:0b6e82025358 139 virtual ble_error_t initializeGATTDatabase(void) = 0;
rgrover1 258:85de85adfac7 140
rgrover1 258:85de85adfac7 141 // ToDo: For updateValue, check the CCCD to see if the value we are
rgrover1 258:85de85adfac7 142 // updating has the notify or indicate bits sent, and if BOTH are set
rgrover1 258:85de85adfac7 143 // be sure to call sd_ble_gatts_hvx() twice with notify then indicate!
rgrover1 258:85de85adfac7 144 // Strange use case, but valid and must be covered!
rgrover1 258:85de85adfac7 145
rgrover1 547:f84c514eee35 146 /**
rgrover1 547:f84c514eee35 147 * Add a callback for the GATT event DATA_SENT (which is triggered when
rgrover1 547:f84c514eee35 148 * updates are sent out by GATT in the form of notifications).
rgrover1 547:f84c514eee35 149 *
rgrover1 547:f84c514eee35 150 * @Note: it is possible to chain together multiple onDataSent callbacks
rgrover1 547:f84c514eee35 151 * (potentially from different modules of an application) to receive updates
rgrover1 547:f84c514eee35 152 * to characteristics.
rgrover1 547:f84c514eee35 153 *
rgrover1 547:f84c514eee35 154 * @Note: it is also possible to setup a callback into a member function of
rgrover1 547:f84c514eee35 155 * some object.
rgrover1 547:f84c514eee35 156 */
rgrover1 547:f84c514eee35 157 void onDataSent(void (*callback)(unsigned count)) {dataSentCallChain.add(callback);}
rgrover1 259:a95264ad705c 158 template <typename T>
rgrover1 547:f84c514eee35 159 void onDataSent(T *objPtr, void (T::*memberPtr)(unsigned count)) {
rgrover1 547:f84c514eee35 160 dataSentCallChain.add(objPtr, memberPtr);
rgrover1 259:a95264ad705c 161 }
rgrover1 547:f84c514eee35 162
rgrover1 548:623e4c0f0b6e 163 /**
rgrover1 548:623e4c0f0b6e 164 * Setup a callback for when an attribute has its value updated by or at the
rgrover1 548:623e4c0f0b6e 165 * connected peer. For a peripheral, this callback triggered when the local
rgrover1 548:623e4c0f0b6e 166 * GATT server has an attribute updated by a write command from the peer.
rgrover1 548:623e4c0f0b6e 167 * For a Central, this callback is triggered when a response is received for
rgrover1 548:623e4c0f0b6e 168 * a write request.
rgrover1 548:623e4c0f0b6e 169 *
rgrover1 548:623e4c0f0b6e 170 * @Note: it is possible to chain together multiple onDataWritten callbacks
rgrover1 548:623e4c0f0b6e 171 * (potentially from different modules of an application) to receive updates
rgrover1 548:623e4c0f0b6e 172 * to characteristics. Many services, such as DFU and UART add their own
rgrover1 548:623e4c0f0b6e 173 * onDataWritten callbacks behind the scenes to trap interesting events.
rgrover1 548:623e4c0f0b6e 174 *
rgrover1 548:623e4c0f0b6e 175 * @Note: it is also possible to setup a callback into a member function of
rgrover1 548:623e4c0f0b6e 176 * some object.
rgrover1 548:623e4c0f0b6e 177 */
rgrover1 548:623e4c0f0b6e 178 void onDataWritten(void (*callback)(const GattWriteCallbackParams *eventDataP)) {dataWrittenCallChain.add(callback);}
rgrover1 258:85de85adfac7 179 template <typename T>
rgrover1 548:623e4c0f0b6e 180 void onDataWritten(T *objPtr, void (T::*memberPtr)(const GattWriteCallbackParams *context)) {
rgrover1 548:623e4c0f0b6e 181 dataWrittenCallChain.add(objPtr, memberPtr);
rgrover1 258:85de85adfac7 182 }
rgrover1 300:d9a39f759a6a 183
rgrover1 300:d9a39f759a6a 184 /**
rgrover1 300:d9a39f759a6a 185 * A virtual function to allow underlying stacks to indicate if they support
rgrover1 300:d9a39f759a6a 186 * onDataRead(). It should be overridden to return true as applicable.
rgrover1 300:d9a39f759a6a 187 */
rgrover1 301:54c87189e423 188 virtual bool isOnDataReadAvailable() const {
rgrover1 300:d9a39f759a6a 189 return false;
rgrover1 300:d9a39f759a6a 190 }
rgrover1 527:493185cebc03 191 ble_error_t setOnDataRead(void (*callback)(const GattReadCallbackParams *eventDataP)) {
rgrover1 301:54c87189e423 192 if (!isOnDataReadAvailable()) {
rgrover1 300:d9a39f759a6a 193 return BLE_ERROR_NOT_IMPLEMENTED;
rgrover1 300:d9a39f759a6a 194 }
rgrover1 300:d9a39f759a6a 195
rgrover1 300:d9a39f759a6a 196 onDataRead.add(callback);
rgrover1 300:d9a39f759a6a 197 return BLE_ERROR_NONE;
rgrover1 300:d9a39f759a6a 198 }
rgrover1 300:d9a39f759a6a 199 template <typename T>
rgrover1 527:493185cebc03 200 ble_error_t setOnDataRead(T *objPtr, void (T::*memberPtr)(const GattReadCallbackParams *context)) {
rgrover1 301:54c87189e423 201 if (!isOnDataReadAvailable()) {
rgrover1 300:d9a39f759a6a 202 return BLE_ERROR_NOT_IMPLEMENTED;
rgrover1 300:d9a39f759a6a 203 }
rgrover1 300:d9a39f759a6a 204
rgrover1 300:d9a39f759a6a 205 onDataRead.add(objPtr, memberPtr);
rgrover1 300:d9a39f759a6a 206 return BLE_ERROR_NONE;
rgrover1 300:d9a39f759a6a 207 }
rgrover1 377:5044c245e996 208 void setOnUpdatesEnabled(EventCallback_t callback) {onUpdatesEnabled = callback;}
rgrover1 377:5044c245e996 209 void setOnUpdatesDisabled(EventCallback_t callback) {onUpdatesDisabled = callback;}
rgrover1 258:85de85adfac7 210 void setOnConfirmationReceived(EventCallback_t callback) {onConfirmationReceived = callback;}
rgrover1 258:85de85adfac7 211
rgrover1 258:85de85adfac7 212 protected:
rgrover1 527:493185cebc03 213 void handleDataWrittenEvent(const GattWriteCallbackParams *params) {
rgrover1 548:623e4c0f0b6e 214 if (dataWrittenCallChain.hasCallbacksAttached()) {
rgrover1 548:623e4c0f0b6e 215 dataWrittenCallChain.call(params);
rgrover1 258:85de85adfac7 216 }
rgrover1 258:85de85adfac7 217 }
rgrover1 258:85de85adfac7 218
rgrover1 527:493185cebc03 219 void handleDataReadEvent(const GattReadCallbackParams *params) {
rgrover1 300:d9a39f759a6a 220 if (onDataRead.hasCallbacksAttached()) {
rgrover1 300:d9a39f759a6a 221 onDataRead.call(params);
rgrover1 300:d9a39f759a6a 222 }
rgrover1 300:d9a39f759a6a 223 }
rgrover1 300:d9a39f759a6a 224
rgrover1 376:47ff130c1d74 225 void handleEvent(GattServerEvents::gattEvent_e type, GattAttribute::Handle_t charHandle) {
rgrover1 258:85de85adfac7 226 switch (type) {
rgrover1 258:85de85adfac7 227 case GattServerEvents::GATT_EVENT_UPDATES_ENABLED:
rgrover1 258:85de85adfac7 228 if (onUpdatesEnabled) {
rgrover1 258:85de85adfac7 229 onUpdatesEnabled(charHandle);
rgrover1 258:85de85adfac7 230 }
rgrover1 258:85de85adfac7 231 break;
rgrover1 258:85de85adfac7 232 case GattServerEvents::GATT_EVENT_UPDATES_DISABLED:
rgrover1 258:85de85adfac7 233 if (onUpdatesDisabled) {
rgrover1 258:85de85adfac7 234 onUpdatesDisabled(charHandle);
rgrover1 258:85de85adfac7 235 }
rgrover1 258:85de85adfac7 236 break;
rgrover1 258:85de85adfac7 237 case GattServerEvents::GATT_EVENT_CONFIRMATION_RECEIVED:
rgrover1 258:85de85adfac7 238 if (onConfirmationReceived) {
rgrover1 258:85de85adfac7 239 onConfirmationReceived(charHandle);
rgrover1 258:85de85adfac7 240 }
rgrover1 258:85de85adfac7 241 break;
rgrover1 267:ad6f6f40eb24 242 default:
rgrover1 267:ad6f6f40eb24 243 break;
rgrover1 258:85de85adfac7 244 }
rgrover1 258:85de85adfac7 245 }
rgrover1 258:85de85adfac7 246
rgrover1 258:85de85adfac7 247 void handleDataSentEvent(unsigned count) {
rgrover1 547:f84c514eee35 248 if (dataSentCallChain.hasCallbacksAttached()) {
rgrover1 547:f84c514eee35 249 dataSentCallChain.call(count);
rgrover1 258:85de85adfac7 250 }
rgrover1 258:85de85adfac7 251 }
rgrover1 258:85de85adfac7 252
rgrover1 258:85de85adfac7 253 protected:
rgrover1 258:85de85adfac7 254 uint8_t serviceCount;
rgrover1 258:85de85adfac7 255 uint8_t characteristicCount;
rgrover1 258:85de85adfac7 256
rgrover1 258:85de85adfac7 257 private:
rgrover1 548:623e4c0f0b6e 258 CallChainOfFunctionPointersWithContext<unsigned> dataSentCallChain;
rgrover1 548:623e4c0f0b6e 259 CallChainOfFunctionPointersWithContext<const GattWriteCallbackParams *> dataWrittenCallChain;
rgrover1 527:493185cebc03 260 CallChainOfFunctionPointersWithContext<const GattReadCallbackParams *> onDataRead;
rgrover1 548:623e4c0f0b6e 261 EventCallback_t onUpdatesEnabled;
rgrover1 548:623e4c0f0b6e 262 EventCallback_t onUpdatesDisabled;
rgrover1 548:623e4c0f0b6e 263 EventCallback_t onConfirmationReceived;
rgrover1 258:85de85adfac7 264
rgrover1 258:85de85adfac7 265 private:
rgrover1 258:85de85adfac7 266 /* disallow copy and assignment */
rgrover1 258:85de85adfac7 267 GattServer(const GattServer &);
rgrover1 258:85de85adfac7 268 GattServer& operator=(const GattServer &);
rgrover1 258:85de85adfac7 269 };
rgrover1 258:85de85adfac7 270
rgrover1 258:85de85adfac7 271 #endif // ifndef __GATT_SERVER_H__