/* 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 __GAP_H__ #define __GAP_H__ #include "GapAdvertisingData.h" #include "GapAdvertisingParams.h" #include "GapEvents.h" #include "CallChain.h" using namespace mbed; class Gap { public: typedef enum addr_type_e { ADDR_TYPE_PUBLIC = 0, ADDR_TYPE_RANDOM_STATIC, ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE, ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE } addr_type_t; static const unsigned ADDR_LEN = 6; typedef uint8_t address_t[ADDR_LEN]; /** * Enumeration for disconnection reasons. The values for these reasons are * derived from Nordic's implementation; but the reasons are meant to be * independent of the transport. If you are returned a reason which is not * covered by this enumeration, then please refer to the underlying * transport library. */ enum DisconnectionReason_t { REMOTE_USER_TERMINATED_CONNECTION = 0x13, LOCAL_HOST_TERMINATED_CONNECTION = 0x16, CONN_INTERVAL_UNACCEPTABLE = 0x3B, }; /* Describes the current state of the device (more than one bit can be set) */ typedef struct GapState_s { unsigned advertising : 1; /**< peripheral is currently advertising */ unsigned connected : 1; /**< peripheral is connected to a central */ } GapState_t; typedef uint16_t Handle_t; typedef struct { uint16_t minConnectionInterval; /**< Minimum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/ uint16_t maxConnectionInterval; /**< Maximum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/ uint16_t slaveLatency; /**< Slave Latency in number of connection events, see @ref BLE_GAP_CP_LIMITS.*/ uint16_t connectionSupervisionTimeout; /**< Connection Supervision Timeout in 10 ms units, see @ref BLE_GAP_CP_LIMITS.*/ } ConnectionParams_t; static const uint16_t UNIT_1_25_MS = 1250; /**< Number of microseconds in 1.25 milliseconds. */ static const uint16_t UNIT_0_625_MS = 650; /**< Number of microseconds in 0.625 milliseconds. */ static uint16_t MSEC_TO_GAP_DURATION_UNITS(uint32_t durationInMillis) { return (durationInMillis * 1000) / UNIT_1_25_MS; } static uint16_t MSEC_TO_ADVERTISEMENT_DURATION_UNITS(uint32_t durationInMillis) { return (durationInMillis * 1000) / UNIT_0_625_MS; } static uint16_t GAP_DURATION_UNITS_TO_MS(uint16_t gapUnits) { return (gapUnits * UNIT_0_625_MS) / 1000; } typedef void (*EventCallback_t)(void); typedef void (*ConnectionEventCallback_t)(Handle_t, addr_type_t peerAddrType, const address_t peerAddr, const ConnectionParams_t *); typedef void (*DisconnectionEventCallback_t)(Handle_t, DisconnectionReason_t); friend class BLEDevice; private: /* These functions must be defined in the sub-class */ virtual ble_error_t setAddress(addr_type_t type, const address_t address) = 0; virtual ble_error_t getAddress(addr_type_t *typeP, address_t address) = 0; virtual ble_error_t setAdvertisingData(const GapAdvertisingData &, const GapAdvertisingData &) = 0; virtual ble_error_t startAdvertising(const GapAdvertisingParams &) = 0; virtual ble_error_t stopAdvertising(void) = 0; virtual uint16_t getMinAdvertisingInterval(void) const = 0; virtual uint16_t getMinNonConnectableAdvertisingInterval(void) const = 0; virtual uint16_t getMaxAdvertisingInterval(void) const = 0; virtual ble_error_t disconnect(DisconnectionReason_t reason) = 0; virtual ble_error_t getPreferredConnectionParams(ConnectionParams_t *params) = 0; virtual ble_error_t setPreferredConnectionParams(const ConnectionParams_t *params) = 0; virtual ble_error_t updateConnectionParams(Handle_t handle, const ConnectionParams_t *params) = 0; virtual ble_error_t setDeviceName(const uint8_t *deviceName) = 0; virtual ble_error_t getDeviceName(uint8_t *deviceName, unsigned *lengthP) = 0; virtual ble_error_t setAppearance(uint16_t appearance) = 0; virtual ble_error_t getAppearance(uint16_t *appearanceP) = 0; protected: /* Event callback handlers */ void setOnTimeout(EventCallback_t callback) {onTimeout = callback;} void setOnConnection(ConnectionEventCallback_t callback) {onConnection = callback;} /** * Set the application callback for disconnection events. * @param callback * Pointer to the unique callback. */ void setOnDisconnection(DisconnectionEventCallback_t callback) {onDisconnection = callback;} /** * Append to a chain of callbacks to be invoked upon disconnection; these * callbacks receive no context and are therefore different from the * onDisconnection callback. * @param callback * function pointer to be invoked upon disconnection; receives no context. * * @note the disconnection CallChain should have been merged with * onDisconnctionCallback; but this was not possible because * FunctionPointer (which is a building block for CallChain) doesn't * accept variadic templates. */ template void addToDisconnectionCallChain(T *tptr, void (T::*mptr)(void)) {disconnectionCallChain.add(tptr, mptr);} private: GapState_t getState(void) const { return state; } protected: /* Default constructor. */ Gap() : state(), onTimeout(NULL), onConnection(NULL), onDisconnection(NULL), disconnectionCallChain() { /* empty */ } public: void processConnectionEvent(Handle_t handle, addr_type_t type, const address_t addr, const ConnectionParams_t *params) { state.connected = 1; if (onConnection) { onConnection(handle, type, addr, params); } } void processDisconnectionEvent(Handle_t handle, DisconnectionReason_t reason) { state.connected = 0; if (onDisconnection) { onDisconnection(handle, reason); } disconnectionCallChain.call(); } void processEvent(GapEvents::gapEvent_e type) { switch (type) { case GapEvents::GAP_EVENT_TIMEOUT: state.advertising = 0; if (onTimeout) { onTimeout(); } break; default: break; } } protected: GapState_t state; protected: EventCallback_t onTimeout; ConnectionEventCallback_t onConnection; DisconnectionEventCallback_t onDisconnection; CallChain disconnectionCallChain; private: /* disallow copy and assignment */ Gap(const Gap &); Gap& operator=(const Gap &); }; #endif // ifndef __GAP_H__