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btle/btle_discovery.h
- Committer:
- rgrover1
- Date:
- 2015-06-19
- Revision:
- 289:b33301b019e6
- Parent:
- 288:1d85c4a4d397
- Child:
- 290:83c994bf62d0
File content as of revision 289:b33301b019e6:
/* 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. */ #ifndef _BTLE_DISCOVERY_H_ #define _BTLE_DISCOVERY_H_ #include "ble.h" #include "ServiceDiscovery.h" void bleGattcEventHandler(const ble_evt_t *p_ble_evt); class NordicServiceDiscovery : public ServiceDiscovery { public: static const uint16_t SRV_DISC_START_HANDLE = 0x0001; /**< The start handle value used during service discovery. */ static const uint16_t SRV_DISC_END_HANDLE = 0xFFFF; /**< The end handle value used during service discovery. */ public: static const unsigned BLE_DB_DISCOVERY_MAX_SRV = 4; /**< Maximum number of services we can retain information for after a single discovery. */ static const unsigned BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV = 4; /**< Maximum number of characteristics per service we can retain information for. */ public: NordicServiceDiscovery() : serviceIndex(0), numServices(0), characteristicIndex(0), numCharacteristics(0), state(INACTIVE), services(), characteristics(), onTerminationCallback(NULL) { /* empty */ } public: ble_error_t launchCharacteristicDiscovery(Gap::Handle_t connectionHandle, Gap::Handle_t startHandle, Gap::Handle_t endHandle); public: void setupDiscoveredServices(const ble_gattc_evt_prim_srvc_disc_rsp_t *response); void setupDiscoveredCharacteristics(const ble_gattc_evt_char_disc_rsp_t *response); void terminateServiceDiscovery(void) { bool wasActive = isActive(); state = INACTIVE; if (wasActive && onTerminationCallback) { onTerminationCallback(connHandle); } } void terminateCharacteristicDiscovery(void) { if (state == CHARACTERISTIC_DISCOVERY_ACTIVE) { state = SERVICE_DISCOVERY_ACTIVE; } serviceIndex++; /* Progress service index to keep discovery alive. */ } bool isActive(void) const { return state != INACTIVE; } void setOnTermination(TerminationCallback_t callback) { onTerminationCallback = callback; } private: void resetDiscoveredServices(void) { numServices = 0; serviceIndex = 0; memset(services, 0, sizeof(DiscoveredService) * BLE_DB_DISCOVERY_MAX_SRV); } void resetDiscoveredCharacteristics(void) { numCharacteristics = 0; characteristicIndex = 0; memset(characteristics, 0, sizeof(DiscoveredCharacteristic) * BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV); } public: void serviceDiscoveryStarted(Gap::Handle_t connectionHandle) { connHandle = connectionHandle; resetDiscoveredServices(); state = SERVICE_DISCOVERY_ACTIVE; } private: void characteristicDiscoveryStarted(Gap::Handle_t connectionHandle) { connHandle = connectionHandle; resetDiscoveredCharacteristics(); state = CHARACTERISTIC_DISCOVERY_ACTIVE; } private: friend void bleGattcEventHandler(const ble_evt_t *p_ble_evt); void progressCharacteristicDiscovery(void); void progressServiceDiscovery(void); private: uint8_t serviceIndex; /**< Index of the current service being discovered. This is intended for internal use during service discovery.*/ uint8_t numServices; /**< Number of services at the peers GATT database.*/ uint8_t characteristicIndex; /**< Index of the current characteristic being discovered. This is intended for internal use during service discovery.*/ uint8_t numCharacteristics; /**< Number of characteristics within the service.*/ enum State_t { INACTIVE, SERVICE_DISCOVERY_ACTIVE, CHARACTERISTIC_DISCOVERY_ACTIVE, } state; DiscoveredService services[BLE_DB_DISCOVERY_MAX_SRV]; /**< Information related to the current service being discovered. * This is intended for internal use during service discovery. */ DiscoveredCharacteristic characteristics[BLE_DB_DISCOVERY_MAX_CHAR_PER_SRV]; TerminationCallback_t onTerminationCallback; }; #endif /*_BTLE_DISCOVERY_H_*/