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btle/btle_discovery.cpp
- Committer:
- rgrover1
- Date:
- 2015-06-19
- Revision:
- 273:8ada9e8111a3
- Parent:
- 272:c918f8a73f3f
- Child:
- 274:f82e0ecba699
File content as of revision 273:8ada9e8111a3:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "blecommon.h" #include "UUID.h" #include "Gap.h" #include "nrf_error.h" #include "btle_discovery.h" #include "ble_err.h" static NordicServiceDiscovery discoverySingleton; ble_error_t ServiceDiscovery::launch(Gap::Handle_t connectionHandle, ServiceCallback_t sc, CharacteristicCallback_t cc, UUID matchingServiceUUIDIn, UUID matchingCharacteristicUUIDIn) { discoverySingleton.serviceCallback = sc; discoverySingleton.characteristicCallback = cc; discoverySingleton.matchingServiceUUID = matchingServiceUUIDIn; discoverySingleton.matchingCharacteristicUUID = matchingCharacteristicUUIDIn; discoverySingleton.serviceDiscoveryStarted(connectionHandle); uint32_t rc; if ((rc = sd_ble_gattc_primary_services_discover(connectionHandle, NordicServiceDiscovery::SRV_DISC_START_HANDLE, NULL)) != NRF_SUCCESS) { discoverySingleton.terminate(); switch (rc) { case NRF_ERROR_INVALID_PARAM: case BLE_ERROR_INVALID_CONN_HANDLE: return BLE_ERROR_INVALID_PARAM; case NRF_ERROR_BUSY: return BLE_STACK_BUSY; default: case NRF_ERROR_INVALID_STATE: return BLE_ERROR_INVALID_STATE; } } return BLE_ERROR_NONE; } void ServiceDiscovery::terminate(void) { discoverySingleton.terminateServiceDiscovery(); } ble_error_t NordicServiceDiscovery::launchCharacteristicDiscovery(Gap::Handle_t connectionHandle, Gap::Handle_t startHandle, Gap::Handle_t endHandle) { discoverySingleton.characteristicDiscoveryStarted(connectionHandle); ble_gattc_handle_range_t handleRange = { .start_handle = startHandle, .end_handle = endHandle }; uint32_t rc; if ((rc = sd_ble_gattc_characteristics_discover(connectionHandle, &handleRange)) != NRF_SUCCESS) { discoverySingleton.terminateCharacteristicDiscovery(); switch (rc) { case BLE_ERROR_INVALID_CONN_HANDLE: case NRF_ERROR_INVALID_ADDR: return BLE_ERROR_INVALID_PARAM; case NRF_ERROR_BUSY: return BLE_STACK_BUSY; default: case NRF_ERROR_INVALID_STATE: return BLE_ERROR_INVALID_STATE; } } return BLE_ERROR_NONE; } void NordicServiceDiscovery::setupDiscoveredServices(const ble_gattc_evt_prim_srvc_disc_rsp_t *response) { serviceIndex = 0; numServices = response->count; /* Account for the limitation on the number of discovered services we can handle at a time. */ if (numServices > BLE_DB_DISCOVERY_MAX_SRV) { numServices = BLE_DB_DISCOVERY_MAX_SRV; } for (unsigned serviceIndex = 0; serviceIndex < numServices; serviceIndex++) { services[serviceIndex].setup(response->services[serviceIndex].uuid.uuid, response->services[serviceIndex].handle_range.start_handle, response->services[serviceIndex].handle_range.end_handle); } } void NordicServiceDiscovery::setupDiscoveredCharacteristics(const ble_gattc_evt_char_disc_rsp_t *response) { characteristicIndex = 0; numCharacteristics = response->count; /* Account for the limitation on the number of discovered characteristics we can handle at a time. */ if (numCharacteristics > BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV) { numCharacteristics = BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV; } for (unsigned charIndex = 0; charIndex < numCharacteristics; charIndex++) { characteristics[charIndex].setup(response->chars[charIndex].uuid.uuid, *(const uint8_t *)(&response->chars[charIndex].char_props), response->chars[charIndex].handle_decl, response->chars[charIndex].handle_value); } } void NordicServiceDiscovery::progressCharacteristicDiscovery(void) { while (cDiscoveryActive && (characteristicIndex < numCharacteristics)) { if (characteristicCallback) { characteristicCallback(characteristics[characteristicIndex]); } characteristicIndex++; } if (cDiscoveryActive) { Gap::Handle_t startHandle = characteristics[characteristicIndex - 1].getValueHandle() + 1; Gap::Handle_t endHandle = services[serviceIndex].getEndHandle(); resetDiscoveredCharacteristics(); if (startHandle < endHandle) { ble_gattc_handle_range_t handleRange = { .start_handle = startHandle, .end_handle = endHandle }; if (sd_ble_gattc_characteristics_discover(connHandle, &handleRange) != NRF_SUCCESS) { terminateCharacteristicDiscovery(); } } else { terminateCharacteristicDiscovery(); } } } void NordicServiceDiscovery::progressServiceDiscovery(void) { while (sDiscoveryActive && (serviceIndex < numServices)) { if (serviceCallback) { serviceCallback(services[serviceIndex]); } if (sDiscoveryActive && characteristicCallback) { /* characteristic discovery is optional. */ launchCharacteristicDiscovery(connHandle, services[serviceIndex].getStartHandle(), services[serviceIndex].getEndHandle()); } else { serviceIndex++; /* Progress service index to keep discovery alive. */ } } if (sDiscoveryActive && (numServices > 0) && (serviceIndex > 0)) { Gap::Handle_t endHandle = services[serviceIndex - 1].getEndHandle(); resetDiscoveredServices(); if (sd_ble_gattc_primary_services_discover(connHandle, endHandle, NULL) != NRF_SUCCESS) { terminateServiceDiscovery(); } } } void bleGattcEventHandler(const ble_evt_t *p_ble_evt) { switch (p_ble_evt->header.evt_id) { case BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP: switch (p_ble_evt->evt.gattc_evt.gatt_status) { case BLE_GATT_STATUS_SUCCESS: discoverySingleton.setupDiscoveredServices(&p_ble_evt->evt.gattc_evt.params.prim_srvc_disc_rsp); break; case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND: default: discoverySingleton.terminate(); break; } break; case BLE_GATTC_EVT_CHAR_DISC_RSP: switch (p_ble_evt->evt.gattc_evt.gatt_status) { case BLE_GATT_STATUS_SUCCESS: discoverySingleton.setupDiscoveredCharacteristics(&p_ble_evt->evt.gattc_evt.params.char_disc_rsp); break; case BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND: default: discoverySingleton.terminateCharacteristicDiscovery(); break; } break; } discoverySingleton.progressCharacteristicDiscovery(); discoverySingleton.progressServiceDiscovery(); }