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Fork of nRF51822 by Nordic Semiconductor

source/nRF5xCharacteristicDescriptorDiscoverer.cpp@569:9e72aa06ec32, 2016-01-11 (annotated)

Committer:
vcoubard
Date:
Mon Jan 11 10:19:20 2016 +0000
Revision:
569:9e72aa06ec32
Parent:
568:13b23a4b1f58 
Synchronized with git rev 15592642

Author: Vincent Coubard

Move Implementation of nRF5xCharacteristicDescriptorDiscoverer::Discovery

to cpp file.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 563:9c4b96f7be8d 1 /* mbed Microcontroller Library
vcoubard 563:9c4b96f7be8d 2 * Copyright (c) 2006-2015 ARM Limited
vcoubard 563:9c4b96f7be8d 3 *
vcoubard 563:9c4b96f7be8d 4 * Licensed under the Apache License, Version 2.0 (the "License");
vcoubard 563:9c4b96f7be8d 5 * you may not use this file except in compliance with the License.
vcoubard 563:9c4b96f7be8d 6 * You may obtain a copy of the License at
vcoubard 563:9c4b96f7be8d 7 *
vcoubard 563:9c4b96f7be8d 8 * http://www.apache.org/licenses/LICENSE-2.0
vcoubard 563:9c4b96f7be8d 9 *
vcoubard 563:9c4b96f7be8d 10 * Unless required by applicable law or agreed to in writing, software
vcoubard 563:9c4b96f7be8d 11 * distributed under the License is distributed on an "AS IS" BASIS,
vcoubard 563:9c4b96f7be8d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vcoubard 563:9c4b96f7be8d 13 * See the License for the specific language governing permissions and
vcoubard 563:9c4b96f7be8d 14 * limitations under the License.
vcoubard 563:9c4b96f7be8d 15 */
vcoubard 563:9c4b96f7be8d 16 #include "nRF5xCharacteristicDescriptorDiscoverer.h"
vcoubard 563:9c4b96f7be8d 17 #include "ble_err.h"
vcoubard 563:9c4b96f7be8d 18 #include "mbed-drivers/mbed_error.h"
vcoubard 563:9c4b96f7be8d 19 #include "ble/DiscoveredCharacteristicDescriptor.h"
vcoubard 563:9c4b96f7be8d 20
vcoubard 568:13b23a4b1f58 21 nRF5xCharacteristicDescriptorDiscoverer::nRF5xCharacteristicDescriptorDiscoverer() :
vcoubard 568:13b23a4b1f58 22 discoveryRunning() {
vcoubard 568:13b23a4b1f58 23 // nothing to do
vcoubard 563:9c4b96f7be8d 24 }
vcoubard 563:9c4b96f7be8d 25
vcoubard 568:13b23a4b1f58 26 nRF5xCharacteristicDescriptorDiscoverer::~nRF5xCharacteristicDescriptorDiscoverer() {
vcoubard 568:13b23a4b1f58 27 // nothing to do
vcoubard 563:9c4b96f7be8d 28 }
vcoubard 563:9c4b96f7be8d 29
vcoubard 563:9c4b96f7be8d 30 ble_error_t nRF5xCharacteristicDescriptorDiscoverer::launch(
vcoubard 568:13b23a4b1f58 31 const DiscoveredCharacteristic& characteristic,
vcoubard 563:9c4b96f7be8d 32 const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& discoveryCallback,
vcoubard 563:9c4b96f7be8d 33 const CharacteristicDescriptorDiscovery::TerminationCallback_t& terminationCallback
vcoubard 563:9c4b96f7be8d 34 ) {
vcoubard 563:9c4b96f7be8d 35 Gap::Handle_t connHandle = characteristic.getConnectionHandle();
vcoubard 568:13b23a4b1f58 36 // it is ok to deduce that the start handle for descriptors is after
vcoubard 563:9c4b96f7be8d 37 // the characteristic declaration and the characteristic value declaration
vcoubard 563:9c4b96f7be8d 38 // see BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part G] (3.3)
vcoubard 563:9c4b96f7be8d 39 Gap::Handle_t descriptorStartHandle = characteristic.getDeclHandle() + 2;
vcoubard 563:9c4b96f7be8d 40 Gap::Handle_t descriptorEndHandle = characteristic.getLastHandle();
vcoubard 563:9c4b96f7be8d 41
vcoubard 568:13b23a4b1f58 42 // check if there is any descriptor to discover
vcoubard 568:13b23a4b1f58 43 if (descriptorEndHandle < descriptorStartHandle) {
vcoubard 568:13b23a4b1f58 44 CharacteristicDescriptorDiscovery::TerminationCallbackParams_t termParams = {
vcoubard 563:9c4b96f7be8d 45 characteristic,
vcoubard 563:9c4b96f7be8d 46 BLE_ERROR_NONE
vcoubard 563:9c4b96f7be8d 47 };
vcoubard 563:9c4b96f7be8d 48 terminationCallback.call(&termParams);
vcoubard 563:9c4b96f7be8d 49 return BLE_ERROR_NONE;
vcoubard 563:9c4b96f7be8d 50 }
vcoubard 563:9c4b96f7be8d 51
vcoubard 563:9c4b96f7be8d 52 // check if we can run this discovery
vcoubard 568:13b23a4b1f58 53 if (isConnectionInUse(connHandle)) {
vcoubard 563:9c4b96f7be8d 54 return BLE_STACK_BUSY;
vcoubard 563:9c4b96f7be8d 55 }
vcoubard 563:9c4b96f7be8d 56
vcoubard 563:9c4b96f7be8d 57 // get a new discovery slot, if none are available, just return
vcoubard 563:9c4b96f7be8d 58 Discovery* discovery = getAvailableDiscoverySlot();
vcoubard 563:9c4b96f7be8d 59 if(discovery == NULL) {
vcoubard 568:13b23a4b1f58 60 return BLE_STACK_BUSY;
vcoubard 563:9c4b96f7be8d 61 }
vcoubard 563:9c4b96f7be8d 62
vcoubard 568:13b23a4b1f58 63 // try to launch the discovery
vcoubard 563:9c4b96f7be8d 64 ble_error_t err = gattc_descriptors_discover(connHandle, descriptorStartHandle, descriptorEndHandle);
vcoubard 568:13b23a4b1f58 65 if(!err) {
vcoubard 563:9c4b96f7be8d 66 // commit the new discovery to its slot
vcoubard 563:9c4b96f7be8d 67 *discovery = Discovery(characteristic, discoveryCallback, terminationCallback);
vcoubard 563:9c4b96f7be8d 68 }
vcoubard 563:9c4b96f7be8d 69
vcoubard 563:9c4b96f7be8d 70 return err;
vcoubard 563:9c4b96f7be8d 71 }
vcoubard 563:9c4b96f7be8d 72
vcoubard 563:9c4b96f7be8d 73 bool nRF5xCharacteristicDescriptorDiscoverer::isActive(const DiscoveredCharacteristic& characteristic) const {
vcoubard 568:13b23a4b1f58 74 for(size_t i = 0; i < MAXIMUM_CONCURRENT_CONNECTIONS_COUNT; ++i) {
vcoubard 569:9e72aa06ec32 75 if(discoveryRunning[i].getCharacteristic() == characteristic) {
vcoubard 568:13b23a4b1f58 76 return true;
vcoubard 568:13b23a4b1f58 77 }
vcoubard 568:13b23a4b1f58 78 }
vcoubard 568:13b23a4b1f58 79 return false;
vcoubard 563:9c4b96f7be8d 80 }
vcoubard 563:9c4b96f7be8d 81
vcoubard 563:9c4b96f7be8d 82 void nRF5xCharacteristicDescriptorDiscoverer::requestTerminate(const DiscoveredCharacteristic& characteristic) {
vcoubard 563:9c4b96f7be8d 83 Discovery* discovery = findRunningDiscovery(characteristic);
vcoubard 568:13b23a4b1f58 84 if(discovery) {
vcoubard 563:9c4b96f7be8d 85 // call terminate anyway
vcoubard 568:13b23a4b1f58 86 terminate(discovery, BLE_ERROR_NONE);
vcoubard 563:9c4b96f7be8d 87 }
vcoubard 563:9c4b96f7be8d 88 }
vcoubard 563:9c4b96f7be8d 89
vcoubard 563:9c4b96f7be8d 90 void nRF5xCharacteristicDescriptorDiscoverer::process(uint16_t connectionHandle, const ble_gattc_evt_desc_disc_rsp_t& descriptors) {
vcoubard 563:9c4b96f7be8d 91 Discovery* discovery = findRunningDiscovery(connectionHandle);
vcoubard 568:13b23a4b1f58 92 // the discovery has been removed
vcoubard 568:13b23a4b1f58 93 if(!discovery) {
vcoubard 568:13b23a4b1f58 94 return;
vcoubard 563:9c4b96f7be8d 95 }
vcoubard 563:9c4b96f7be8d 96
vcoubard 563:9c4b96f7be8d 97 for (uint16_t i = 0; i < descriptors.count; ++i) {
vcoubard 563:9c4b96f7be8d 98 discovery->process(
vcoubard 563:9c4b96f7be8d 99 descriptors.descs[i].handle, UUID(descriptors.descs[i].uuid.uuid)
vcoubard 563:9c4b96f7be8d 100 );
vcoubard 563:9c4b96f7be8d 101 }
vcoubard 563:9c4b96f7be8d 102
vcoubard 563:9c4b96f7be8d 103 // prepare the next discovery request (if needed)
vcoubard 563:9c4b96f7be8d 104 uint16_t startHandle = descriptors.descs[descriptors.count - 1].handle + 1;
vcoubard 569:9e72aa06ec32 105 uint16_t endHandle = discovery->getCharacteristic().getLastHandle();
vcoubard 563:9c4b96f7be8d 106
vcoubard 568:13b23a4b1f58 107 if(startHandle > endHandle) {
vcoubard 568:13b23a4b1f58 108 terminate(discovery, BLE_ERROR_NONE);
vcoubard 563:9c4b96f7be8d 109 return;
vcoubard 563:9c4b96f7be8d 110 }
vcoubard 563:9c4b96f7be8d 111
vcoubard 563:9c4b96f7be8d 112 ble_error_t err = gattc_descriptors_discover(connectionHandle, startHandle, endHandle);
vcoubard 568:13b23a4b1f58 113 if(err) {
vcoubard 568:13b23a4b1f58 114 terminate(discovery, err);
vcoubard 563:9c4b96f7be8d 115 return;
vcoubard 563:9c4b96f7be8d 116 }
vcoubard 563:9c4b96f7be8d 117 }
vcoubard 563:9c4b96f7be8d 118
vcoubard 563:9c4b96f7be8d 119 void nRF5xCharacteristicDescriptorDiscoverer::terminate(uint16_t handle, ble_error_t err) {
vcoubard 563:9c4b96f7be8d 120 Discovery* discovery = findRunningDiscovery(handle);
vcoubard 568:13b23a4b1f58 121 // the discovery has already been terminated
vcoubard 568:13b23a4b1f58 122 if(!discovery) {
vcoubard 568:13b23a4b1f58 123 return;
vcoubard 563:9c4b96f7be8d 124 }
vcoubard 563:9c4b96f7be8d 125
vcoubard 568:13b23a4b1f58 126 terminate(discovery, err);
vcoubard 568:13b23a4b1f58 127 }
vcoubard 568:13b23a4b1f58 128
vcoubard 568:13b23a4b1f58 129 void nRF5xCharacteristicDescriptorDiscoverer::terminate(Discovery* discovery, ble_error_t err) {
vcoubard 568:13b23a4b1f58 130 // temporary copy, user code can try to launch a new discovery in the onTerminate
vcoubard 568:13b23a4b1f58 131 // callback. So, this discovery should not appear in such case.
vcoubard 563:9c4b96f7be8d 132 Discovery tmp = *discovery;
vcoubard 563:9c4b96f7be8d 133 *discovery = Discovery();
vcoubard 563:9c4b96f7be8d 134 tmp.terminate(err);
vcoubard 563:9c4b96f7be8d 135 }
vcoubard 563:9c4b96f7be8d 136
vcoubard 568:13b23a4b1f58 137 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 563:9c4b96f7be8d 138 nRF5xCharacteristicDescriptorDiscoverer::findRunningDiscovery(const DiscoveredCharacteristic& characteristic) {
vcoubard 568:13b23a4b1f58 139 for(size_t i = 0; i < MAXIMUM_CONCURRENT_CONNECTIONS_COUNT; ++i) {
vcoubard 569:9e72aa06ec32 140 if((discoveryRunning[i].getCharacteristic() == characteristic) &&
vcoubard 569:9e72aa06ec32 141 (discoveryRunning[i].isEmpty() == false)) {
vcoubard 563:9c4b96f7be8d 142 return &discoveryRunning[i];
vcoubard 563:9c4b96f7be8d 143 }
vcoubard 563:9c4b96f7be8d 144 }
vcoubard 563:9c4b96f7be8d 145 return NULL;
vcoubard 563:9c4b96f7be8d 146 }
vcoubard 563:9c4b96f7be8d 147
vcoubard 568:13b23a4b1f58 148 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 568:13b23a4b1f58 149 nRF5xCharacteristicDescriptorDiscoverer::findRunningDiscovery(uint16_t handle) {
vcoubard 568:13b23a4b1f58 150 for(size_t i = 0; i < MAXIMUM_CONCURRENT_CONNECTIONS_COUNT; ++i) {
vcoubard 569:9e72aa06ec32 151 if((discoveryRunning[i].getCharacteristic().getConnectionHandle() == handle) &&
vcoubard 569:9e72aa06ec32 152 (discoveryRunning[i].isEmpty() == false)) {
vcoubard 563:9c4b96f7be8d 153 return &discoveryRunning[i];
vcoubard 563:9c4b96f7be8d 154 }
vcoubard 563:9c4b96f7be8d 155 }
vcoubard 563:9c4b96f7be8d 156 return NULL;
vcoubard 563:9c4b96f7be8d 157 }
vcoubard 563:9c4b96f7be8d 158
vcoubard 568:13b23a4b1f58 159 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 568:13b23a4b1f58 160 nRF5xCharacteristicDescriptorDiscoverer::getAvailableDiscoverySlot() {
vcoubard 568:13b23a4b1f58 161 for(size_t i = 0; i < MAXIMUM_CONCURRENT_CONNECTIONS_COUNT; ++i) {
vcoubard 568:13b23a4b1f58 162 if(discoveryRunning[i].isEmpty()) {
vcoubard 563:9c4b96f7be8d 163 return &discoveryRunning[i];
vcoubard 563:9c4b96f7be8d 164 }
vcoubard 563:9c4b96f7be8d 165 }
vcoubard 563:9c4b96f7be8d 166 return NULL;
vcoubard 563:9c4b96f7be8d 167 }
vcoubard 563:9c4b96f7be8d 168
vcoubard 563:9c4b96f7be8d 169 bool nRF5xCharacteristicDescriptorDiscoverer::isConnectionInUse(uint16_t connHandle) {
vcoubard 563:9c4b96f7be8d 170 return findRunningDiscovery(connHandle) != NULL;
vcoubard 563:9c4b96f7be8d 171 }
vcoubard 563:9c4b96f7be8d 172
vcoubard 563:9c4b96f7be8d 173 ble_error_t nRF5xCharacteristicDescriptorDiscoverer::gattc_descriptors_discover(
vcoubard 568:13b23a4b1f58 174 uint16_t connection_handle, uint16_t start_handle, uint16_t end_handle) {
vcoubard 563:9c4b96f7be8d 175
vcoubard 563:9c4b96f7be8d 176 ble_gattc_handle_range_t discoveryRange = {
vcoubard 563:9c4b96f7be8d 177 start_handle,
vcoubard 563:9c4b96f7be8d 178 end_handle
vcoubard 563:9c4b96f7be8d 179 };
vcoubard 563:9c4b96f7be8d 180 uint32_t err = sd_ble_gattc_descriptors_discover(connection_handle, &discoveryRange);
vcoubard 563:9c4b96f7be8d 181
vcoubard 568:13b23a4b1f58 182 switch(err) {
vcoubard 563:9c4b96f7be8d 183 case NRF_SUCCESS:
vcoubard 568:13b23a4b1f58 184 return BLE_ERROR_NONE;
vcoubard 563:9c4b96f7be8d 185 case BLE_ERROR_INVALID_CONN_HANDLE:
vcoubard 563:9c4b96f7be8d 186 return BLE_ERROR_INVALID_PARAM;
vcoubard 563:9c4b96f7be8d 187 case NRF_ERROR_INVALID_ADDR:
vcoubard 563:9c4b96f7be8d 188 return BLE_ERROR_PARAM_OUT_OF_RANGE;
vcoubard 563:9c4b96f7be8d 189 case NRF_ERROR_BUSY:
vcoubard 563:9c4b96f7be8d 190 return BLE_STACK_BUSY;
vcoubard 563:9c4b96f7be8d 191 default:
vcoubard 563:9c4b96f7be8d 192 return BLE_ERROR_UNSPECIFIED;
vcoubard 563:9c4b96f7be8d 193 }
vcoubard 569:9e72aa06ec32 194 }
vcoubard 569:9e72aa06ec32 195
vcoubard 569:9e72aa06ec32 196 // implementation of nRF5xCharacteristicDescriptorDiscoverer::Discovery
vcoubard 569:9e72aa06ec32 197
vcoubard 569:9e72aa06ec32 198 nRF5xCharacteristicDescriptorDiscoverer::Discovery::Discovery() :
vcoubard 569:9e72aa06ec32 199 characteristic(), onDiscovery(), onTerminate() {
vcoubard 569:9e72aa06ec32 200 }
vcoubard 569:9e72aa06ec32 201
vcoubard 569:9e72aa06ec32 202 nRF5xCharacteristicDescriptorDiscoverer::Discovery::Discovery(
vcoubard 569:9e72aa06ec32 203 const DiscoveredCharacteristic& c, const DiscoveryCallback_t& dCb, const TerminationCallback_t& tCb) :
vcoubard 569:9e72aa06ec32 204 characteristic(c), onDiscovery(dCb), onTerminate(tCb) {
vcoubard 569:9e72aa06ec32 205 }
vcoubard 569:9e72aa06ec32 206
vcoubard 569:9e72aa06ec32 207 void nRF5xCharacteristicDescriptorDiscoverer::Discovery::process(
vcoubard 569:9e72aa06ec32 208 GattAttribute::Handle_t handle, const UUID& uuid) {
vcoubard 569:9e72aa06ec32 209 CharacteristicDescriptorDiscovery::DiscoveryCallbackParams_t params = {
vcoubard 569:9e72aa06ec32 210 characteristic,
vcoubard 569:9e72aa06ec32 211 DiscoveredCharacteristicDescriptor(
vcoubard 569:9e72aa06ec32 212 characteristic.getGattClient(),
vcoubard 569:9e72aa06ec32 213 characteristic.getConnectionHandle(),
vcoubard 569:9e72aa06ec32 214 handle,
vcoubard 569:9e72aa06ec32 215 uuid
vcoubard 569:9e72aa06ec32 216 )
vcoubard 569:9e72aa06ec32 217 };
vcoubard 569:9e72aa06ec32 218 onDiscovery.call(&params);
vcoubard 569:9e72aa06ec32 219 }
vcoubard 569:9e72aa06ec32 220
vcoubard 569:9e72aa06ec32 221 void nRF5xCharacteristicDescriptorDiscoverer::Discovery::terminate(ble_error_t err) {
vcoubard 569:9e72aa06ec32 222 CharacteristicDescriptorDiscovery::TerminationCallbackParams_t params = {
vcoubard 569:9e72aa06ec32 223 characteristic,
vcoubard 569:9e72aa06ec32 224 err
vcoubard 569:9e72aa06ec32 225 };
vcoubard 569:9e72aa06ec32 226
vcoubard 569:9e72aa06ec32 227 onTerminate.call(&params);
vcoubard 569:9e72aa06ec32 228 }
vcoubard 569:9e72aa06ec32 229
vcoubard 569:9e72aa06ec32 230 bool nRF5xCharacteristicDescriptorDiscoverer::Discovery::isEmpty() const {
vcoubard 569:9e72aa06ec32 231 return *this == Discovery();
vcoubard 569:9e72aa06ec32 232 }
vcoubard 569:9e72aa06ec32 233
vcoubard 569:9e72aa06ec32 234 const DiscoveredCharacteristic& nRF5xCharacteristicDescriptorDiscoverer::Discovery::getCharacteristic() const {
vcoubard 569:9e72aa06ec32 235 return characteristic;
vcoubard 563:9c4b96f7be8d 236 }