Oscar Ariza / nRF51822

nordic

Fork of nRF51822 by Nordic Semiconductor

btle/btle_discovery.cpp@259:62d6bf03e6a4, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:55:23 2015 +0100
Revision:
259:62d6bf03e6a4
Parent:
258:6e0ae0f1697b
Child:
265:5533ac0adf4b
Synchronized with git rev 3aae9f8e

Author: Rohit Grover

terminate discovery upon encountering errors.

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 244:a966506d1e5b 24 static NordicServiceDiscovery discoverySingleton;
rgrover1 240:693a1f145b5a 25
rgrover1 240:693a1f145b5a 26 ble_error_t
rgrover1 240:693a1f145b5a 27 ServiceDiscovery::launch(Gap::Handle_t connectionHandle, ServiceCallback_t sc, CharacteristicCallback_t cc)
rgrover1 240:693a1f145b5a 28 {
rgrover1 244:a966506d1e5b 29 discoverySingleton.serviceDiscoveryStarted(connectionHandle);
rgrover1 250:55aa8e43f532 30 discoverySingleton.serviceCallback = sc;
rgrover1 250:55aa8e43f532 31 discoverySingleton.characteristicCallback = cc;
rgrover1 240:693a1f145b5a 32
rgrover1 240:693a1f145b5a 33 uint32_t rc;
rgrover1 249:71ef03789dd3 34 if ((rc = sd_ble_gattc_primary_services_discover(connectionHandle, NordicServiceDiscovery::SRV_DISC_START_HANDLE, NULL)) != NRF_SUCCESS) {
rgrover1 249:71ef03789dd3 35 discoverySingleton.terminate();
rgrover1 240:693a1f145b5a 36 switch (rc) {
rgrover1 240:693a1f145b5a 37 case NRF_ERROR_INVALID_PARAM:
rgrover1 240:693a1f145b5a 38 case BLE_ERROR_INVALID_CONN_HANDLE:
rgrover1 240:693a1f145b5a 39 return BLE_ERROR_INVALID_PARAM;
rgrover1 240:693a1f145b5a 40 case NRF_ERROR_BUSY:
rgrover1 240:693a1f145b5a 41 return BLE_STACK_BUSY;
rgrover1 240:693a1f145b5a 42 default:
rgrover1 240:693a1f145b5a 43 case NRF_ERROR_INVALID_STATE:
rgrover1 240:693a1f145b5a 44 return BLE_ERROR_INVALID_STATE;
rgrover1 240:693a1f145b5a 45 }
rgrover1 240:693a1f145b5a 46 }
rgrover1 240:693a1f145b5a 47
rgrover1 240:693a1f145b5a 48 return BLE_ERROR_NONE;
rgrover1 240:693a1f145b5a 49 }
rgrover1 240:693a1f145b5a 50
rgrover1 258:6e0ae0f1697b 51 ble_error_t
rgrover1 258:6e0ae0f1697b 52 ServiceDiscovery::launch(Gap::Handle_t connectionHandle,
rgrover1 258:6e0ae0f1697b 53 UUID matchingServiceUUIDIn,
rgrover1 258:6e0ae0f1697b 54 ServiceCallback_t sc,
rgrover1 258:6e0ae0f1697b 55 UUID matchingCharacteristicUUIDIn,
rgrover1 258:6e0ae0f1697b 56 CharacteristicCallback_t cc)
rgrover1 258:6e0ae0f1697b 57 {
rgrover1 258:6e0ae0f1697b 58 discoverySingleton.matchingServiceUUID = matchingServiceUUIDIn;
rgrover1 258:6e0ae0f1697b 59 discoverySingleton.matchingCharacteristicUUID = matchingCharacteristicUUIDIn;
rgrover1 258:6e0ae0f1697b 60
rgrover1 258:6e0ae0f1697b 61 return launch(connectionHandle, sc, cc);
rgrover1 258:6e0ae0f1697b 62 }
rgrover1 258:6e0ae0f1697b 63
rgrover1 249:71ef03789dd3 64 void
rgrover1 249:71ef03789dd3 65 ServiceDiscovery::terminate(void)
rgrover1 249:71ef03789dd3 66 {
rgrover1 249:71ef03789dd3 67 discoverySingleton.terminateServiceDiscovery();
rgrover1 249:71ef03789dd3 68 }
rgrover1 249:71ef03789dd3 69
rgrover1 244:a966506d1e5b 70 ble_error_t
rgrover1 253:4b3f294415f5 71 NordicServiceDiscovery::launchCharacteristicDiscovery(Gap::Handle_t connectionHandle,
rgrover1 253:4b3f294415f5 72 Gap::Handle_t startHandle,
rgrover1 253:4b3f294415f5 73 Gap::Handle_t endHandle)
rgrover1 253:4b3f294415f5 74 {
rgrover1 244:a966506d1e5b 75 discoverySingleton.characteristicDiscoveryStarted(connectionHandle);
rgrover1 240:693a1f145b5a 76
rgrover1 240:693a1f145b5a 77 ble_gattc_handle_range_t handleRange = {
rgrover1 240:693a1f145b5a 78 .start_handle = startHandle,
rgrover1 240:693a1f145b5a 79 .end_handle = endHandle
rgrover1 240:693a1f145b5a 80 };
rgrover1 240:693a1f145b5a 81 uint32_t rc;
rgrover1 240:693a1f145b5a 82 if ((rc = sd_ble_gattc_characteristics_discover(connectionHandle, &handleRange)) != NRF_SUCCESS) {
rgrover1 244:a966506d1e5b 83 discoverySingleton.terminateCharacteristicDiscovery();
rgrover1 240:693a1f145b5a 84 switch (rc) {
rgrover1 240:693a1f145b5a 85 case BLE_ERROR_INVALID_CONN_HANDLE:
rgrover1 240:693a1f145b5a 86 case NRF_ERROR_INVALID_ADDR:
rgrover1 240:693a1f145b5a 87 return BLE_ERROR_INVALID_PARAM;
rgrover1 240:693a1f145b5a 88 case NRF_ERROR_BUSY:
rgrover1 240:693a1f145b5a 89 return BLE_STACK_BUSY;
rgrover1 240:693a1f145b5a 90 default:
rgrover1 240:693a1f145b5a 91 case NRF_ERROR_INVALID_STATE:
rgrover1 240:693a1f145b5a 92 return BLE_ERROR_INVALID_STATE;
rgrover1 240:693a1f145b5a 93 }
rgrover1 240:693a1f145b5a 94 }
rgrover1 240:693a1f145b5a 95
rgrover1 240:693a1f145b5a 96 return BLE_ERROR_NONE;
rgrover1 240:693a1f145b5a 97 }
rgrover1 240:693a1f145b5a 98
rgrover1 240:693a1f145b5a 99 void
rgrover1 241:75b69581d1dd 100 NordicServiceDiscovery::setupDiscoveredServices(const ble_gattc_evt_prim_srvc_disc_rsp_t *response)
rgrover1 240:693a1f145b5a 101 {
rgrover1 243:73fc02cc20b1 102 serviceIndex = 0;
rgrover1 243:73fc02cc20b1 103 numServices = response->count;
rgrover1 240:693a1f145b5a 104
rgrover1 240:693a1f145b5a 105 /* Account for the limitation on the number of discovered services we can handle at a time. */
rgrover1 243:73fc02cc20b1 106 if (numServices > BLE_DB_DISCOVERY_MAX_SRV) {
rgrover1 243:73fc02cc20b1 107 numServices = BLE_DB_DISCOVERY_MAX_SRV;
rgrover1 240:693a1f145b5a 108 }
rgrover1 240:693a1f145b5a 109
rgrover1 243:73fc02cc20b1 110 for (unsigned serviceIndex = 0; serviceIndex < numServices; serviceIndex++) {
rgrover1 240:693a1f145b5a 111 services[serviceIndex].setup(response->services[serviceIndex].uuid.uuid,
rgrover1 240:693a1f145b5a 112 response->services[serviceIndex].handle_range.start_handle,
rgrover1 240:693a1f145b5a 113 response->services[serviceIndex].handle_range.end_handle);
rgrover1 240:693a1f145b5a 114 }
rgrover1 240:693a1f145b5a 115 }
rgrover1 240:693a1f145b5a 116
rgrover1 240:693a1f145b5a 117 void
rgrover1 241:75b69581d1dd 118 NordicServiceDiscovery::setupDiscoveredCharacteristics(const ble_gattc_evt_char_disc_rsp_t *response)
rgrover1 240:693a1f145b5a 119 {
rgrover1 243:73fc02cc20b1 120 characteristicIndex = 0;
rgrover1 243:73fc02cc20b1 121 numCharacteristics = response->count;
rgrover1 240:693a1f145b5a 122
rgrover1 240:693a1f145b5a 123 /* Account for the limitation on the number of discovered characteristics we can handle at a time. */
rgrover1 243:73fc02cc20b1 124 if (numCharacteristics > BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV) {
rgrover1 243:73fc02cc20b1 125 numCharacteristics = BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV;
rgrover1 240:693a1f145b5a 126 }
rgrover1 240:693a1f145b5a 127
rgrover1 243:73fc02cc20b1 128 for (unsigned charIndex = 0; charIndex < numCharacteristics; charIndex++) {
rgrover1 240:693a1f145b5a 129 characteristics[charIndex].setup(response->chars[charIndex].uuid.uuid,
rgrover1 240:693a1f145b5a 130 *(const uint8_t *)(&response->chars[charIndex].char_props),
rgrover1 240:693a1f145b5a 131 response->chars[charIndex].handle_decl,
rgrover1 240:693a1f145b5a 132 response->chars[charIndex].handle_value);
rgrover1 240:693a1f145b5a 133 }
rgrover1 244:a966506d1e5b 134 }
rgrover1 244:a966506d1e5b 135
rgrover1 252:d4e0cf5e8751 136 void
rgrover1 252:d4e0cf5e8751 137 NordicServiceDiscovery::progressCharacteristicDiscovery(void)
rgrover1 252:d4e0cf5e8751 138 {
rgrover1 252:d4e0cf5e8751 139 while (cDiscoveryActive && (characteristicIndex < numCharacteristics)) {
rgrover1 256:d228656b0cd1 140 if (characteristicCallback) {
rgrover1 256:d228656b0cd1 141 characteristicCallback(characteristics[characteristicIndex]);
rgrover1 256:d228656b0cd1 142 }
rgrover1 252:d4e0cf5e8751 143
rgrover1 252:d4e0cf5e8751 144 characteristicIndex++;
rgrover1 252:d4e0cf5e8751 145 }
rgrover1 252:d4e0cf5e8751 146
rgrover1 252:d4e0cf5e8751 147 if (cDiscoveryActive) {
rgrover1 252:d4e0cf5e8751 148 Gap::Handle_t startHandle = characteristics[characteristicIndex - 1].valueHandle + 1;
rgrover1 252:d4e0cf5e8751 149 Gap::Handle_t endHandle = services[serviceIndex].endHandle;
rgrover1 252:d4e0cf5e8751 150 resetDiscoveredCharacteristics();
rgrover1 252:d4e0cf5e8751 151
rgrover1 252:d4e0cf5e8751 152 if (startHandle < endHandle) {
rgrover1 252:d4e0cf5e8751 153 ble_gattc_handle_range_t handleRange = {
rgrover1 252:d4e0cf5e8751 154 .start_handle = startHandle,
rgrover1 252:d4e0cf5e8751 155 .end_handle = endHandle
rgrover1 252:d4e0cf5e8751 156 };
rgrover1 259:62d6bf03e6a4 157 if (sd_ble_gattc_characteristics_discover(connHandle, &handleRange) != NRF_SUCCESS) {
rgrover1 259:62d6bf03e6a4 158 terminateCharacteristicDiscovery();
rgrover1 259:62d6bf03e6a4 159 }
rgrover1 252:d4e0cf5e8751 160 } else {
rgrover1 252:d4e0cf5e8751 161 terminateCharacteristicDiscovery();
rgrover1 252:d4e0cf5e8751 162 }
rgrover1 252:d4e0cf5e8751 163 }
rgrover1 252:d4e0cf5e8751 164 }
rgrover1 252:d4e0cf5e8751 165
rgrover1 252:d4e0cf5e8751 166 void
rgrover1 252:d4e0cf5e8751 167 NordicServiceDiscovery::progressServiceDiscovery(void)
rgrover1 252:d4e0cf5e8751 168 {
rgrover1 252:d4e0cf5e8751 169 while (sDiscoveryActive && (serviceIndex < numServices)) {
rgrover1 255:c14e1d09f197 170 if (serviceCallback) {
rgrover1 255:c14e1d09f197 171 serviceCallback(services[serviceIndex]);
rgrover1 255:c14e1d09f197 172 }
rgrover1 252:d4e0cf5e8751 173
rgrover1 256:d228656b0cd1 174 if (characteristicCallback) { /* characteristic discovery is optional. */
rgrover1 252:d4e0cf5e8751 175 launchCharacteristicDiscovery(connHandle, services[serviceIndex].startHandle, services[serviceIndex].endHandle);
rgrover1 252:d4e0cf5e8751 176 } else {
rgrover1 252:d4e0cf5e8751 177 serviceIndex++; /* Progress service index to keep discovery alive. */
rgrover1 252:d4e0cf5e8751 178 }
rgrover1 252:d4e0cf5e8751 179 }
rgrover1 252:d4e0cf5e8751 180 if (sDiscoveryActive && (numServices > 0) && (serviceIndex > 0)) {
rgrover1 252:d4e0cf5e8751 181 Gap::Handle_t endHandle = services[serviceIndex - 1].endHandle;
rgrover1 252:d4e0cf5e8751 182 resetDiscoveredServices();
rgrover1 252:d4e0cf5e8751 183
rgrover1 259:62d6bf03e6a4 184 if (sd_ble_gattc_primary_services_discover(connHandle, endHandle, NULL) != NRF_SUCCESS) {
rgrover1 259:62d6bf03e6a4 185 terminateServiceDiscovery();
rgrover1 259:62d6bf03e6a4 186 }
rgrover1 252:d4e0cf5e8751 187 }
rgrover1 252:d4e0cf5e8751 188 }
rgrover1 252:d4e0cf5e8751 189
rgrover1 244:a966506d1e5b 190 void bleGattcEventHandler(const ble_evt_t *p_ble_evt)
rgrover1 244:a966506d1e5b 191 {
rgrover1 244:a966506d1e5b 192 switch (p_ble_evt->header.evt_id) {
rgrover1 244:a966506d1e5b 193 case BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP:
rgrover1 244:a966506d1e5b 194 switch (p_ble_evt->evt.gattc_evt.gatt_status) {
rgrover1 244:a966506d1e5b 195 case BLE_GATT_STATUS_SUCCESS:
rgrover1 244:a966506d1e5b 196 discoverySingleton.setupDiscoveredServices(&p_ble_evt->evt.gattc_evt.params.prim_srvc_disc_rsp);
rgrover1 244:a966506d1e5b 197 break;
rgrover1 244:a966506d1e5b 198
rgrover1 244:a966506d1e5b 199 case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND:
rgrover1 244:a966506d1e5b 200 default:
rgrover1 244:a966506d1e5b 201 discoverySingleton.terminate();
rgrover1 244:a966506d1e5b 202 break;
rgrover1 244:a966506d1e5b 203 }
rgrover1 244:a966506d1e5b 204 break;
rgrover1 244:a966506d1e5b 205
rgrover1 244:a966506d1e5b 206 case BLE_GATTC_EVT_CHAR_DISC_RSP:
rgrover1 244:a966506d1e5b 207 switch (p_ble_evt->evt.gattc_evt.gatt_status) {
rgrover1 244:a966506d1e5b 208 case BLE_GATT_STATUS_SUCCESS:
rgrover1 244:a966506d1e5b 209 discoverySingleton.setupDiscoveredCharacteristics(&p_ble_evt->evt.gattc_evt.params.char_disc_rsp);
rgrover1 244:a966506d1e5b 210 break;
rgrover1 244:a966506d1e5b 211
rgrover1 244:a966506d1e5b 212 case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND:
rgrover1 244:a966506d1e5b 213 default:
rgrover1 244:a966506d1e5b 214 discoverySingleton.terminateCharacteristicDiscovery();
rgrover1 244:a966506d1e5b 215 break;
rgrover1 244:a966506d1e5b 216 }
rgrover1 244:a966506d1e5b 217 break;
rgrover1 244:a966506d1e5b 218 }
rgrover1 244:a966506d1e5b 219
rgrover1 244:a966506d1e5b 220 discoverySingleton.progressCharacteristicDiscovery();
rgrover1 244:a966506d1e5b 221 discoverySingleton.progressServiceDiscovery();
rgrover1 240:693a1f145b5a 222 }