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source/nRF5xCharacteristicDescriptorDiscoverer.cpp@545:d834e6591aee, 2016-01-11 (annotated)

Committer:
vcoubard
Date:
Mon Jan 11 10:19:04 2016 +0000
Revision:
545:d834e6591aee
Parent:
544:9e3d053ad4ec 
Synchronized with git rev 8bd7bdfa

Author: Vincent Coubard

Add ARM header into source/nRF5xGattClient.h.

Use const references for passing characteristic discovery callbacks

Fix a bug in btle_discovery.cpp, the discovered descriptors were captured

by value instead of reference.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 545:d834e6591aee 1 /* mbed Microcontroller Library
vcoubard 545:d834e6591aee 2 * Copyright (c) 2006-2015 ARM Limited
vcoubard 545:d834e6591aee 3 *
vcoubard 545:d834e6591aee 4 * Licensed under the Apache License, Version 2.0 (the "License");
vcoubard 545:d834e6591aee 5 * you may not use this file except in compliance with the License.
vcoubard 545:d834e6591aee 6 * You may obtain a copy of the License at
vcoubard 545:d834e6591aee 7 *
vcoubard 545:d834e6591aee 8 * http://www.apache.org/licenses/LICENSE-2.0
vcoubard 545:d834e6591aee 9 *
vcoubard 545:d834e6591aee 10 * Unless required by applicable law or agreed to in writing, software
vcoubard 545:d834e6591aee 11 * distributed under the License is distributed on an "AS IS" BASIS,
vcoubard 545:d834e6591aee 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vcoubard 545:d834e6591aee 13 * See the License for the specific language governing permissions and
vcoubard 545:d834e6591aee 14 * limitations under the License.
vcoubard 545:d834e6591aee 15 */
vcoubard 545:d834e6591aee 16
vcoubard 542:1bf9c597f44f 17 #include "nRF5xCharacteristicDescriptorDiscoverer.h"
vcoubard 542:1bf9c597f44f 18 #include "ble_err.h"
vcoubard 542:1bf9c597f44f 19 #include "mbed-drivers/mbed_error.h"
vcoubard 542:1bf9c597f44f 20 #include "ble/DiscoveredCharacteristicDescriptor.h"
vcoubard 542:1bf9c597f44f 21
vcoubard 542:1bf9c597f44f 22 namespace {
vcoubard 542:1bf9c597f44f 23 void emptyDiscoveryCallback(const CharacteristicDescriptorDiscovery::DiscoveryCallbackParams_t*) { }
vcoubard 542:1bf9c597f44f 24 void emptyTerminationCallback(const CharacteristicDescriptorDiscovery::TerminationCallbackParams_t*) { }
vcoubard 542:1bf9c597f44f 25 }
vcoubard 542:1bf9c597f44f 26
vcoubard 542:1bf9c597f44f 27 nRF5xCharacteristicDescriptorDiscoverer::nRF5xCharacteristicDescriptorDiscoverer(size_t concurrentConnectionsCount) :
vcoubard 542:1bf9c597f44f 28 maximumConcurrentConnectionsCount(concurrentConnectionsCount),
vcoubard 542:1bf9c597f44f 29 discoveryRunning(new Discovery[concurrentConnectionsCount]) {
vcoubard 542:1bf9c597f44f 30
vcoubard 542:1bf9c597f44f 31 }
vcoubard 542:1bf9c597f44f 32
vcoubard 542:1bf9c597f44f 33 nRF5xCharacteristicDescriptorDiscoverer::~nRF5xCharacteristicDescriptorDiscoverer() {
vcoubard 542:1bf9c597f44f 34 delete [] discoveryRunning;
vcoubard 542:1bf9c597f44f 35 }
vcoubard 542:1bf9c597f44f 36
vcoubard 542:1bf9c597f44f 37 ble_error_t nRF5xCharacteristicDescriptorDiscoverer::launch(
vcoubard 542:1bf9c597f44f 38 const DiscoveredCharacteristic& characteristic,
vcoubard 542:1bf9c597f44f 39 const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& discoveryCallback,
vcoubard 542:1bf9c597f44f 40 const CharacteristicDescriptorDiscovery::TerminationCallback_t& terminationCallback
vcoubard 542:1bf9c597f44f 41 ) {
vcoubard 542:1bf9c597f44f 42 Gap::Handle_t connHandle = characteristic.getConnectionHandle();
vcoubard 542:1bf9c597f44f 43 // it is ok to deduce that the start handle for descriptors is after
vcoubard 542:1bf9c597f44f 44 // the characteristic declaration and the characteristic value declaration
vcoubard 542:1bf9c597f44f 45 // see BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part G] (3.3)
vcoubard 542:1bf9c597f44f 46 Gap::Handle_t descriptorStartHandle = characteristic.getDeclHandle() + 2;
vcoubard 542:1bf9c597f44f 47 Gap::Handle_t descriptorEndHandle = characteristic.getLastHandle();
vcoubard 542:1bf9c597f44f 48
vcoubard 542:1bf9c597f44f 49 // check if their is any descriptor to discover
vcoubard 542:1bf9c597f44f 50 if (descriptorEndHandle < descriptorStartHandle) {
vcoubard 542:1bf9c597f44f 51 CharacteristicDescriptorDiscovery::TerminationCallbackParams_t termParams = {
vcoubard 543:53215259c0d2 52 characteristic,
vcoubard 543:53215259c0d2 53 BLE_ERROR_NONE
vcoubard 542:1bf9c597f44f 54 };
vcoubard 542:1bf9c597f44f 55 terminationCallback.call(&termParams);
vcoubard 542:1bf9c597f44f 56 return BLE_ERROR_NONE;
vcoubard 542:1bf9c597f44f 57 }
vcoubard 542:1bf9c597f44f 58
vcoubard 542:1bf9c597f44f 59 // check if we can run this discovery
vcoubard 542:1bf9c597f44f 60 if (isConnectionInUse(connHandle)) {
vcoubard 542:1bf9c597f44f 61 return BLE_STACK_BUSY;
vcoubard 542:1bf9c597f44f 62 }
vcoubard 542:1bf9c597f44f 63
vcoubard 542:1bf9c597f44f 64 // get a new discovery slot, if none are available, just return
vcoubard 542:1bf9c597f44f 65 Discovery* discovery = getAvailableDiscoverySlot();
vcoubard 542:1bf9c597f44f 66 if(discovery == NULL) {
vcoubard 542:1bf9c597f44f 67 return BLE_STACK_BUSY;
vcoubard 542:1bf9c597f44f 68 }
vcoubard 542:1bf9c597f44f 69
vcoubard 542:1bf9c597f44f 70 // try to launch the discovery
vcoubard 543:53215259c0d2 71 ble_error_t err = gattc_descriptors_discover(connHandle, descriptorStartHandle, descriptorEndHandle);
vcoubard 543:53215259c0d2 72 if(!err) {
vcoubard 543:53215259c0d2 73 // commit the new discovery to its slot
vcoubard 543:53215259c0d2 74 *discovery = Discovery(characteristic, discoveryCallback, terminationCallback);
vcoubard 543:53215259c0d2 75 }
vcoubard 542:1bf9c597f44f 76
vcoubard 543:53215259c0d2 77 return err;
vcoubard 542:1bf9c597f44f 78 }
vcoubard 542:1bf9c597f44f 79
vcoubard 542:1bf9c597f44f 80 bool nRF5xCharacteristicDescriptorDiscoverer::isActive(const DiscoveredCharacteristic& characteristic) const {
vcoubard 542:1bf9c597f44f 81 return findRunningDiscovery(characteristic) != NULL;
vcoubard 542:1bf9c597f44f 82 }
vcoubard 542:1bf9c597f44f 83
vcoubard 542:1bf9c597f44f 84 void nRF5xCharacteristicDescriptorDiscoverer::requestTerminate(const DiscoveredCharacteristic& characteristic) {
vcoubard 542:1bf9c597f44f 85 Discovery* discovery = findRunningDiscovery(characteristic);
vcoubard 542:1bf9c597f44f 86 if(discovery) {
vcoubard 542:1bf9c597f44f 87 discovery->onDiscovery = emptyDiscoveryCallback;
vcoubard 542:1bf9c597f44f 88 // call terminate anyway
vcoubard 543:53215259c0d2 89 discovery->terminate(BLE_ERROR_NONE);
vcoubard 542:1bf9c597f44f 90 discovery->onTerminate = emptyTerminationCallback;
vcoubard 542:1bf9c597f44f 91 }
vcoubard 542:1bf9c597f44f 92 }
vcoubard 542:1bf9c597f44f 93
vcoubard 543:53215259c0d2 94 void nRF5xCharacteristicDescriptorDiscoverer::process(uint16_t connectionHandle, const ble_gattc_evt_desc_disc_rsp_t& descriptors) {
vcoubard 543:53215259c0d2 95 Discovery* discovery = findRunningDiscovery(connectionHandle);
vcoubard 542:1bf9c597f44f 96 if(!discovery) {
vcoubard 542:1bf9c597f44f 97 error("logic error in nRF5xCharacteristicDescriptorDiscoverer::process !!!");
vcoubard 542:1bf9c597f44f 98 }
vcoubard 542:1bf9c597f44f 99
vcoubard 542:1bf9c597f44f 100 for (uint16_t i = 0; i < descriptors.count; ++i) {
vcoubard 542:1bf9c597f44f 101 discovery->process(
vcoubard 542:1bf9c597f44f 102 descriptors.descs[i].handle, UUID(descriptors.descs[i].uuid.uuid)
vcoubard 542:1bf9c597f44f 103 );
vcoubard 542:1bf9c597f44f 104 }
vcoubard 543:53215259c0d2 105
vcoubard 543:53215259c0d2 106 // prepare the next discovery request (if needed)
vcoubard 543:53215259c0d2 107 uint16_t startHandle = descriptors.descs[descriptors.count - 1].handle + 1;
vcoubard 543:53215259c0d2 108 uint16_t endHandle = discovery->characteristic.getLastHandle();
vcoubard 543:53215259c0d2 109
vcoubard 543:53215259c0d2 110 if(startHandle > endHandle ||
vcoubard 543:53215259c0d2 111 (discovery->onDiscovery == emptyDiscoveryCallback && discovery->onTerminate == emptyTerminationCallback)) {
vcoubard 543:53215259c0d2 112 terminate(connectionHandle, BLE_ERROR_NONE);
vcoubard 543:53215259c0d2 113 return;
vcoubard 543:53215259c0d2 114 }
vcoubard 543:53215259c0d2 115
vcoubard 543:53215259c0d2 116 ble_error_t err = gattc_descriptors_discover(connectionHandle, startHandle, endHandle);
vcoubard 543:53215259c0d2 117 if(err) {
vcoubard 543:53215259c0d2 118 terminate(connectionHandle, err);
vcoubard 543:53215259c0d2 119 return;
vcoubard 543:53215259c0d2 120 }
vcoubard 542:1bf9c597f44f 121 }
vcoubard 542:1bf9c597f44f 122
vcoubard 543:53215259c0d2 123 void nRF5xCharacteristicDescriptorDiscoverer::terminate(uint16_t handle, ble_error_t err) {
vcoubard 542:1bf9c597f44f 124 Discovery* discovery = findRunningDiscovery(handle);
vcoubard 542:1bf9c597f44f 125 if(!discovery) {
vcoubard 542:1bf9c597f44f 126 error("logic error in nRF5xCharacteristicDescriptorDiscoverer::process !!!");
vcoubard 542:1bf9c597f44f 127 }
vcoubard 544:9e3d053ad4ec 128
vcoubard 544:9e3d053ad4ec 129 Discovery tmp = *discovery;
vcoubard 544:9e3d053ad4ec 130 *discovery = Discovery();
vcoubard 544:9e3d053ad4ec 131 tmp.terminate(err);
vcoubard 542:1bf9c597f44f 132 }
vcoubard 542:1bf9c597f44f 133
vcoubard 542:1bf9c597f44f 134 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 542:1bf9c597f44f 135 nRF5xCharacteristicDescriptorDiscoverer::findRunningDiscovery(const DiscoveredCharacteristic& characteristic) {
vcoubard 542:1bf9c597f44f 136 for(size_t i = 0; i < maximumConcurrentConnectionsCount; ++i) {
vcoubard 542:1bf9c597f44f 137 if(discoveryRunning[i].characteristic == characteristic) {
vcoubard 542:1bf9c597f44f 138 return &discoveryRunning[i];
vcoubard 542:1bf9c597f44f 139 }
vcoubard 542:1bf9c597f44f 140 }
vcoubard 542:1bf9c597f44f 141 return NULL;
vcoubard 542:1bf9c597f44f 142 }
vcoubard 542:1bf9c597f44f 143
vcoubard 542:1bf9c597f44f 144 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 542:1bf9c597f44f 145 nRF5xCharacteristicDescriptorDiscoverer::findRunningDiscovery(const DiscoveredCharacteristic& characteristic) const {
vcoubard 542:1bf9c597f44f 146 for(size_t i = 0; i < maximumConcurrentConnectionsCount; ++i) {
vcoubard 542:1bf9c597f44f 147 if(discoveryRunning[i].characteristic == characteristic) {
vcoubard 542:1bf9c597f44f 148 return &discoveryRunning[i];
vcoubard 542:1bf9c597f44f 149 }
vcoubard 542:1bf9c597f44f 150 }
vcoubard 542:1bf9c597f44f 151 return NULL;
vcoubard 542:1bf9c597f44f 152 }
vcoubard 542:1bf9c597f44f 153
vcoubard 542:1bf9c597f44f 154 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 542:1bf9c597f44f 155 nRF5xCharacteristicDescriptorDiscoverer::findRunningDiscovery(uint16_t handle) {
vcoubard 544:9e3d053ad4ec 156 for(size_t i = 0; i < maximumConcurrentConnectionsCount; ++i) {
vcoubard 544:9e3d053ad4ec 157 if(discoveryRunning[i].characteristic.getConnectionHandle() == handle &&
vcoubard 544:9e3d053ad4ec 158 discoveryRunning[i] != Discovery()) {
vcoubard 542:1bf9c597f44f 159 return &discoveryRunning[i];
vcoubard 542:1bf9c597f44f 160 }
vcoubard 542:1bf9c597f44f 161 }
vcoubard 542:1bf9c597f44f 162 return NULL;
vcoubard 542:1bf9c597f44f 163 }
vcoubard 542:1bf9c597f44f 164
vcoubard 542:1bf9c597f44f 165 void nRF5xCharacteristicDescriptorDiscoverer::removeDiscovery(Discovery* discovery) {
vcoubard 542:1bf9c597f44f 166 for(size_t i = 0; i < maximumConcurrentConnectionsCount; ++i) {
vcoubard 542:1bf9c597f44f 167 if(&discoveryRunning[i] == discovery) {
vcoubard 542:1bf9c597f44f 168 discoveryRunning[i] = Discovery();
vcoubard 542:1bf9c597f44f 169 }
vcoubard 542:1bf9c597f44f 170 }
vcoubard 542:1bf9c597f44f 171 }
vcoubard 542:1bf9c597f44f 172
vcoubard 542:1bf9c597f44f 173 nRF5xCharacteristicDescriptorDiscoverer::Discovery*
vcoubard 542:1bf9c597f44f 174 nRF5xCharacteristicDescriptorDiscoverer::getAvailableDiscoverySlot() {
vcoubard 542:1bf9c597f44f 175 for(size_t i = 0; i < maximumConcurrentConnectionsCount; ++i) {
vcoubard 542:1bf9c597f44f 176 if(discoveryRunning[i] == Discovery()) {
vcoubard 542:1bf9c597f44f 177 return &discoveryRunning[i];
vcoubard 542:1bf9c597f44f 178 }
vcoubard 542:1bf9c597f44f 179 }
vcoubard 542:1bf9c597f44f 180 return NULL;
vcoubard 542:1bf9c597f44f 181 }
vcoubard 542:1bf9c597f44f 182
vcoubard 542:1bf9c597f44f 183 bool nRF5xCharacteristicDescriptorDiscoverer::isConnectionInUse(uint16_t connHandle) {
vcoubard 542:1bf9c597f44f 184 return findRunningDiscovery(connHandle) != NULL;
vcoubard 543:53215259c0d2 185 }
vcoubard 543:53215259c0d2 186
vcoubard 543:53215259c0d2 187 ble_error_t nRF5xCharacteristicDescriptorDiscoverer::gattc_descriptors_discover(
vcoubard 543:53215259c0d2 188 uint16_t connection_handle, uint16_t start_handle, uint16_t end_handle) {
vcoubard 543:53215259c0d2 189
vcoubard 543:53215259c0d2 190 ble_gattc_handle_range_t discoveryRange = {
vcoubard 543:53215259c0d2 191 start_handle,
vcoubard 543:53215259c0d2 192 end_handle
vcoubard 543:53215259c0d2 193 };
vcoubard 543:53215259c0d2 194 uint32_t err = sd_ble_gattc_descriptors_discover(connection_handle, &discoveryRange);
vcoubard 543:53215259c0d2 195
vcoubard 543:53215259c0d2 196 switch(err) {
vcoubard 543:53215259c0d2 197 case NRF_SUCCESS:
vcoubard 543:53215259c0d2 198 return BLE_ERROR_NONE;
vcoubard 543:53215259c0d2 199 case BLE_ERROR_INVALID_CONN_HANDLE:
vcoubard 543:53215259c0d2 200 return BLE_ERROR_INVALID_PARAM;
vcoubard 543:53215259c0d2 201 case NRF_ERROR_INVALID_ADDR:
vcoubard 543:53215259c0d2 202 return BLE_ERROR_PARAM_OUT_OF_RANGE;
vcoubard 543:53215259c0d2 203 case NRF_ERROR_BUSY:
vcoubard 543:53215259c0d2 204 return BLE_STACK_BUSY;
vcoubard 543:53215259c0d2 205 default:
vcoubard 543:53215259c0d2 206 return BLE_ERROR_UNSPECIFIED;
vcoubard 543:53215259c0d2 207 }
vcoubard 542:1bf9c597f44f 208 }