Oscar Ariza / nRF51822

nordic

Fork of nRF51822 by Nordic Semiconductor

btle/btle_discovery.cpp@283:6633922380bf, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:55:26 2015 +0100
Revision:
283:6633922380bf
Parent:
282:2280bb1a9a9e
Child:
284:c4c2aeab86c3
Synchronized with git rev 0bfd7d58

Author: Rohit Grover

handle matching characteristic UUIDs properly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 244:a966506d1e5b 1 /* mbed Microcontroller Library
rgrover1 244:a966506d1e5b 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 244:a966506d1e5b 3 *
rgrover1 244:a966506d1e5b 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 244:a966506d1e5b 5 * you may not use this file except in compliance with the License.
rgrover1 244:a966506d1e5b 6 * You may obtain a copy of the License at
rgrover1 244:a966506d1e5b 7 *
rgrover1 244:a966506d1e5b 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 244:a966506d1e5b 9 *
rgrover1 244:a966506d1e5b 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 244:a966506d1e5b 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 244:a966506d1e5b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 244:a966506d1e5b 13 * See the License for the specific language governing permissions and
rgrover1 244:a966506d1e5b 14 * limitations under the License.
rgrover1 244:a966506d1e5b 15 */
rgrover1 244:a966506d1e5b 16
rgrover1 240:693a1f145b5a 17 #include "blecommon.h"
rgrover1 240:693a1f145b5a 18 #include "UUID.h"
rgrover1 240:693a1f145b5a 19 #include "Gap.h"
rgrover1 240:693a1f145b5a 20 #include "nrf_error.h"
rgrover1 240:693a1f145b5a 21 #include "btle_discovery.h"
rgrover1 240:693a1f145b5a 22 #include "ble_err.h"
rgrover1 244:a966506d1e5b 23
rgrover1 279:26e3f0ef1e14 24 static NordicServiceDiscovery sdSingleton;
rgrover1 240:693a1f145b5a 25
rgrover1 240:693a1f145b5a 26 ble_error_t
rgrover1 276:fd709cd8b1b2 27 ServiceDiscovery::launch(Gap::Handle_t connectionHandle,
rgrover1 276:fd709cd8b1b2 28 ServiceCallback_t sc,
rgrover1 276:fd709cd8b1b2 29 CharacteristicCallback_t cc,
rgrover1 276:fd709cd8b1b2 30 const UUID &matchingServiceUUIDIn,
rgrover1 276:fd709cd8b1b2 31 const UUID &matchingCharacteristicUUIDIn)
rgrover1 240:693a1f145b5a 32 {
rgrover1 282:2280bb1a9a9e 33 if (isActive()) {
rgrover1 282:2280bb1a9a9e 34 return BLE_ERROR_INVALID_STATE;
rgrover1 282:2280bb1a9a9e 35 }
rgrover1 282:2280bb1a9a9e 36
rgrover1 279:26e3f0ef1e14 37 sdSingleton.serviceCallback = sc;
rgrover1 279:26e3f0ef1e14 38 sdSingleton.characteristicCallback = cc;
rgrover1 279:26e3f0ef1e14 39 sdSingleton.matchingServiceUUID = matchingServiceUUIDIn;
rgrover1 279:26e3f0ef1e14 40 sdSingleton.matchingCharacteristicUUID = matchingCharacteristicUUIDIn;
rgrover1 274:8ada9e8111a3 41
rgrover1 279:26e3f0ef1e14 42 sdSingleton.serviceDiscoveryStarted(connectionHandle);
rgrover1 240:693a1f145b5a 43
rgrover1 240:693a1f145b5a 44 uint32_t rc;
rgrover1 249:71ef03789dd3 45 if ((rc = sd_ble_gattc_primary_services_discover(connectionHandle, NordicServiceDiscovery::SRV_DISC_START_HANDLE, NULL)) != NRF_SUCCESS) {
rgrover1 279:26e3f0ef1e14 46 sdSingleton.terminate();
rgrover1 240:693a1f145b5a 47 switch (rc) {
rgrover1 240:693a1f145b5a 48 case NRF_ERROR_INVALID_PARAM:
rgrover1 240:693a1f145b5a 49 case BLE_ERROR_INVALID_CONN_HANDLE:
rgrover1 240:693a1f145b5a 50 return BLE_ERROR_INVALID_PARAM;
rgrover1 240:693a1f145b5a 51 case NRF_ERROR_BUSY:
rgrover1 240:693a1f145b5a 52 return BLE_STACK_BUSY;
rgrover1 240:693a1f145b5a 53 default:
rgrover1 240:693a1f145b5a 54 case NRF_ERROR_INVALID_STATE:
rgrover1 240:693a1f145b5a 55 return BLE_ERROR_INVALID_STATE;
rgrover1 240:693a1f145b5a 56 }
rgrover1 240:693a1f145b5a 57 }
rgrover1 240:693a1f145b5a 58
rgrover1 240:693a1f145b5a 59 return BLE_ERROR_NONE;
rgrover1 240:693a1f145b5a 60 }
rgrover1 240:693a1f145b5a 61
rgrover1 249:71ef03789dd3 62 void
rgrover1 249:71ef03789dd3 63 ServiceDiscovery::terminate(void)
rgrover1 249:71ef03789dd3 64 {
rgrover1 279:26e3f0ef1e14 65 sdSingleton.terminateServiceDiscovery();
rgrover1 249:71ef03789dd3 66 }
rgrover1 249:71ef03789dd3 67
rgrover1 280:6e5e79f1fb61 68 bool
rgrover1 280:6e5e79f1fb61 69 ServiceDiscovery::isActive(void)
rgrover1 280:6e5e79f1fb61 70 {
rgrover1 280:6e5e79f1fb61 71 return sdSingleton.isActive();
rgrover1 280:6e5e79f1fb61 72 }
rgrover1 280:6e5e79f1fb61 73
rgrover1 281:cbaa4cb83548 74 void ServiceDiscovery::onTermination(TerminationCallback_t callback) {
rgrover1 281:cbaa4cb83548 75 sdSingleton.setOnTermination(callback);
rgrover1 281:cbaa4cb83548 76 }
rgrover1 281:cbaa4cb83548 77
rgrover1 244:a966506d1e5b 78 ble_error_t
rgrover1 253:4b3f294415f5 79 NordicServiceDiscovery::launchCharacteristicDiscovery(Gap::Handle_t connectionHandle,
rgrover1 253:4b3f294415f5 80 Gap::Handle_t startHandle,
rgrover1 253:4b3f294415f5 81 Gap::Handle_t endHandle)
rgrover1 253:4b3f294415f5 82 {
rgrover1 279:26e3f0ef1e14 83 sdSingleton.characteristicDiscoveryStarted(connectionHandle);
rgrover1 240:693a1f145b5a 84
rgrover1 240:693a1f145b5a 85 ble_gattc_handle_range_t handleRange = {
rgrover1 240:693a1f145b5a 86 .start_handle = startHandle,
rgrover1 240:693a1f145b5a 87 .end_handle = endHandle
rgrover1 240:693a1f145b5a 88 };
rgrover1 240:693a1f145b5a 89 uint32_t rc;
rgrover1 240:693a1f145b5a 90 if ((rc = sd_ble_gattc_characteristics_discover(connectionHandle, &handleRange)) != NRF_SUCCESS) {
rgrover1 279:26e3f0ef1e14 91 sdSingleton.terminateCharacteristicDiscovery();
rgrover1 240:693a1f145b5a 92 switch (rc) {
rgrover1 240:693a1f145b5a 93 case BLE_ERROR_INVALID_CONN_HANDLE:
rgrover1 240:693a1f145b5a 94 case NRF_ERROR_INVALID_ADDR:
rgrover1 240:693a1f145b5a 95 return BLE_ERROR_INVALID_PARAM;
rgrover1 240:693a1f145b5a 96 case NRF_ERROR_BUSY:
rgrover1 240:693a1f145b5a 97 return BLE_STACK_BUSY;
rgrover1 240:693a1f145b5a 98 default:
rgrover1 240:693a1f145b5a 99 case NRF_ERROR_INVALID_STATE:
rgrover1 240:693a1f145b5a 100 return BLE_ERROR_INVALID_STATE;
rgrover1 240:693a1f145b5a 101 }
rgrover1 240:693a1f145b5a 102 }
rgrover1 240:693a1f145b5a 103
rgrover1 240:693a1f145b5a 104 return BLE_ERROR_NONE;
rgrover1 240:693a1f145b5a 105 }
rgrover1 240:693a1f145b5a 106
rgrover1 240:693a1f145b5a 107 void
rgrover1 241:75b69581d1dd 108 NordicServiceDiscovery::setupDiscoveredServices(const ble_gattc_evt_prim_srvc_disc_rsp_t *response)
rgrover1 240:693a1f145b5a 109 {
rgrover1 243:73fc02cc20b1 110 serviceIndex = 0;
rgrover1 243:73fc02cc20b1 111 numServices = response->count;
rgrover1 240:693a1f145b5a 112
rgrover1 240:693a1f145b5a 113 /* Account for the limitation on the number of discovered services we can handle at a time. */
rgrover1 243:73fc02cc20b1 114 if (numServices > BLE_DB_DISCOVERY_MAX_SRV) {
rgrover1 243:73fc02cc20b1 115 numServices = BLE_DB_DISCOVERY_MAX_SRV;
rgrover1 240:693a1f145b5a 116 }
rgrover1 240:693a1f145b5a 117
rgrover1 243:73fc02cc20b1 118 for (unsigned serviceIndex = 0; serviceIndex < numServices; serviceIndex++) {
rgrover1 240:693a1f145b5a 119 services[serviceIndex].setup(response->services[serviceIndex].uuid.uuid,
rgrover1 240:693a1f145b5a 120 response->services[serviceIndex].handle_range.start_handle,
rgrover1 240:693a1f145b5a 121 response->services[serviceIndex].handle_range.end_handle);
rgrover1 240:693a1f145b5a 122 }
rgrover1 240:693a1f145b5a 123 }
rgrover1 240:693a1f145b5a 124
rgrover1 240:693a1f145b5a 125 void
rgrover1 241:75b69581d1dd 126 NordicServiceDiscovery::setupDiscoveredCharacteristics(const ble_gattc_evt_char_disc_rsp_t *response)
rgrover1 240:693a1f145b5a 127 {
rgrover1 243:73fc02cc20b1 128 characteristicIndex = 0;
rgrover1 243:73fc02cc20b1 129 numCharacteristics = response->count;
rgrover1 240:693a1f145b5a 130
rgrover1 240:693a1f145b5a 131 /* Account for the limitation on the number of discovered characteristics we can handle at a time. */
rgrover1 243:73fc02cc20b1 132 if (numCharacteristics > BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV) {
rgrover1 243:73fc02cc20b1 133 numCharacteristics = BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV;
rgrover1 240:693a1f145b5a 134 }
rgrover1 240:693a1f145b5a 135
rgrover1 243:73fc02cc20b1 136 for (unsigned charIndex = 0; charIndex < numCharacteristics; charIndex++) {
rgrover1 240:693a1f145b5a 137 characteristics[charIndex].setup(response->chars[charIndex].uuid.uuid,
rgrover1 240:693a1f145b5a 138 *(const uint8_t *)(&response->chars[charIndex].char_props),
rgrover1 240:693a1f145b5a 139 response->chars[charIndex].handle_decl,
rgrover1 240:693a1f145b5a 140 response->chars[charIndex].handle_value);
rgrover1 240:693a1f145b5a 141 }
rgrover1 244:a966506d1e5b 142 }
rgrover1 244:a966506d1e5b 143
rgrover1 252:d4e0cf5e8751 144 void
rgrover1 252:d4e0cf5e8751 145 NordicServiceDiscovery::progressCharacteristicDiscovery(void)
rgrover1 252:d4e0cf5e8751 146 {
rgrover1 277:ae6e5129b395 147 /* Iterate through the previously discovered characteristics cached in characteristics[]. */
rgrover1 252:d4e0cf5e8751 148 while (cDiscoveryActive && (characteristicIndex < numCharacteristics)) {
rgrover1 283:6633922380bf 149 if ((matchingCharacteristicUUID == ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) ||
rgrover1 283:6633922380bf 150 (matchingCharacteristicUUID == characteristics[characteristicIndex].getShortUUID())) {
rgrover1 283:6633922380bf 151 if (characteristicCallback) {
rgrover1 283:6633922380bf 152 characteristicCallback(characteristics[characteristicIndex]);
rgrover1 283:6633922380bf 153 }
rgrover1 256:d228656b0cd1 154 }
rgrover1 252:d4e0cf5e8751 155
rgrover1 252:d4e0cf5e8751 156 characteristicIndex++;
rgrover1 252:d4e0cf5e8751 157 }
rgrover1 252:d4e0cf5e8751 158
rgrover1 277:ae6e5129b395 159 /* Relaunch discovery of new characteristics beyond the last entry cached in characteristics[]. */
rgrover1 252:d4e0cf5e8751 160 if (cDiscoveryActive) {
rgrover1 277:ae6e5129b395 161 /* Determine the ending handle of the last cached characteristic. */
rgrover1 265:5533ac0adf4b 162 Gap::Handle_t startHandle = characteristics[characteristicIndex - 1].getValueHandle() + 1;
rgrover1 265:5533ac0adf4b 163 Gap::Handle_t endHandle = services[serviceIndex].getEndHandle();
rgrover1 275:f82e0ecba699 164 resetDiscoveredCharacteristics(); /* Note: resetDiscoveredCharacteristics() must come after fetching start and end Handles. */
rgrover1 252:d4e0cf5e8751 165
rgrover1 252:d4e0cf5e8751 166 if (startHandle < endHandle) {
rgrover1 252:d4e0cf5e8751 167 ble_gattc_handle_range_t handleRange = {
rgrover1 252:d4e0cf5e8751 168 .start_handle = startHandle,
rgrover1 252:d4e0cf5e8751 169 .end_handle = endHandle
rgrover1 252:d4e0cf5e8751 170 };
rgrover1 259:62d6bf03e6a4 171 if (sd_ble_gattc_characteristics_discover(connHandle, &handleRange) != NRF_SUCCESS) {
rgrover1 259:62d6bf03e6a4 172 terminateCharacteristicDiscovery();
rgrover1 259:62d6bf03e6a4 173 }
rgrover1 252:d4e0cf5e8751 174 } else {
rgrover1 278:91705df8495e 175 terminateCharacteristicDiscovery();
rgrover1 252:d4e0cf5e8751 176 }
rgrover1 252:d4e0cf5e8751 177 }
rgrover1 252:d4e0cf5e8751 178 }
rgrover1 252:d4e0cf5e8751 179
rgrover1 252:d4e0cf5e8751 180 void
rgrover1 252:d4e0cf5e8751 181 NordicServiceDiscovery::progressServiceDiscovery(void)
rgrover1 252:d4e0cf5e8751 182 {
rgrover1 277:ae6e5129b395 183 /* Iterate through the previously discovered services cached in services[]. */
rgrover1 252:d4e0cf5e8751 184 while (sDiscoveryActive && (serviceIndex < numServices)) {
rgrover1 278:91705df8495e 185 if ((matchingServiceUUID == ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) ||
rgrover1 278:91705df8495e 186 (matchingServiceUUID == services[serviceIndex].getShortUUID())) {
rgrover1 278:91705df8495e 187 if (serviceCallback) {
rgrover1 278:91705df8495e 188 serviceCallback(services[serviceIndex]);
rgrover1 278:91705df8495e 189 }
rgrover1 252:d4e0cf5e8751 190
rgrover1 278:91705df8495e 191 if (sDiscoveryActive && characteristicCallback) {
rgrover1 278:91705df8495e 192 launchCharacteristicDiscovery(connHandle, services[serviceIndex].getStartHandle(), services[serviceIndex].getEndHandle());
rgrover1 278:91705df8495e 193 } else {
rgrover1 278:91705df8495e 194 serviceIndex++;
rgrover1 278:91705df8495e 195 }
rgrover1 252:d4e0cf5e8751 196 } else {
rgrover1 278:91705df8495e 197 serviceIndex++;
rgrover1 252:d4e0cf5e8751 198 }
rgrover1 252:d4e0cf5e8751 199 }
rgrover1 277:ae6e5129b395 200
rgrover1 277:ae6e5129b395 201 /* Relaunch discovery of new services beyond the last entry cached in services[]. */
rgrover1 252:d4e0cf5e8751 202 if (sDiscoveryActive && (numServices > 0) && (serviceIndex > 0)) {
rgrover1 277:ae6e5129b395 203 /* Determine the ending handle of the last cached service. */
rgrover1 265:5533ac0adf4b 204 Gap::Handle_t endHandle = services[serviceIndex - 1].getEndHandle();
rgrover1 275:f82e0ecba699 205 resetDiscoveredServices(); /* Note: resetDiscoveredServices() must come after fetching endHandle. */
rgrover1 252:d4e0cf5e8751 206
rgrover1 259:62d6bf03e6a4 207 if (sd_ble_gattc_primary_services_discover(connHandle, endHandle, NULL) != NRF_SUCCESS) {
rgrover1 259:62d6bf03e6a4 208 terminateServiceDiscovery();
rgrover1 259:62d6bf03e6a4 209 }
rgrover1 252:d4e0cf5e8751 210 }
rgrover1 252:d4e0cf5e8751 211 }
rgrover1 252:d4e0cf5e8751 212
rgrover1 244:a966506d1e5b 213 void bleGattcEventHandler(const ble_evt_t *p_ble_evt)
rgrover1 244:a966506d1e5b 214 {
rgrover1 244:a966506d1e5b 215 switch (p_ble_evt->header.evt_id) {
rgrover1 244:a966506d1e5b 216 case BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP:
rgrover1 244:a966506d1e5b 217 switch (p_ble_evt->evt.gattc_evt.gatt_status) {
rgrover1 244:a966506d1e5b 218 case BLE_GATT_STATUS_SUCCESS:
rgrover1 279:26e3f0ef1e14 219 sdSingleton.setupDiscoveredServices(&p_ble_evt->evt.gattc_evt.params.prim_srvc_disc_rsp);
rgrover1 244:a966506d1e5b 220 break;
rgrover1 244:a966506d1e5b 221
rgrover1 244:a966506d1e5b 222 case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND:
rgrover1 244:a966506d1e5b 223 default:
rgrover1 279:26e3f0ef1e14 224 sdSingleton.terminate();
rgrover1 244:a966506d1e5b 225 break;
rgrover1 244:a966506d1e5b 226 }
rgrover1 244:a966506d1e5b 227 break;
rgrover1 244:a966506d1e5b 228
rgrover1 244:a966506d1e5b 229 case BLE_GATTC_EVT_CHAR_DISC_RSP:
rgrover1 244:a966506d1e5b 230 switch (p_ble_evt->evt.gattc_evt.gatt_status) {
rgrover1 244:a966506d1e5b 231 case BLE_GATT_STATUS_SUCCESS:
rgrover1 279:26e3f0ef1e14 232 sdSingleton.setupDiscoveredCharacteristics(&p_ble_evt->evt.gattc_evt.params.char_disc_rsp);
rgrover1 244:a966506d1e5b 233 break;
rgrover1 244:a966506d1e5b 234
rgrover1 244:a966506d1e5b 235 case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND:
rgrover1 244:a966506d1e5b 236 default:
rgrover1 279:26e3f0ef1e14 237 sdSingleton.terminateCharacteristicDiscovery();
rgrover1 244:a966506d1e5b 238 break;
rgrover1 244:a966506d1e5b 239 }
rgrover1 244:a966506d1e5b 240 break;
rgrover1 244:a966506d1e5b 241 }
rgrover1 244:a966506d1e5b 242
rgrover1 279:26e3f0ef1e14 243 sdSingleton.progressCharacteristicDiscovery();
rgrover1 279:26e3f0ef1e14 244 sdSingleton.progressServiceDiscovery();
rgrover1 240:693a1f145b5a 245 }