YuLin Jiang
BLE_API for nRF51
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BLE_API
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Bluetooth Low Energy
Diff: ble/Gap.h
- Revision:
- 710:b2e1a2660ec2
- Child:
- 725:f4a355b35cf8
diff -r 77f6fc6999cd -r b2e1a2660ec2 ble/Gap.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ble/Gap.h Fri Jun 19 15:53:28 2015 +0100
@@ -0,0 +1,886 @@
+/* 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 "GapScanningParams.h"
+#include "GapEvents.h"
+#include "CallChain.h"
+#include "FunctionPointerWithContext.h"
+
+using namespace mbed;
+
+/* Forward declarations for classes which will only be used for pointers or references in the following. */
+class GapAdvertisingParams;
+class GapScanningParams;
+class GapAdvertisingData;
+
+class Gap {
+public:
+ enum AddressType_t {
+ ADDR_TYPE_PUBLIC = 0,
+ ADDR_TYPE_RANDOM_STATIC,
+ ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
+ ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE
+ };
+ typedef enum AddressType_t addr_type_t; /* @Note: deprecated. Use AddressType_t instead. */
+
+ static const unsigned ADDR_LEN = 6;
+ typedef uint8_t Address_t[ADDR_LEN]; /* 48-bit address, LSB format. */
+ typedef Address_t address_t; /* @Note: deprecated. Use Address_t instead. */
+
+ enum TimeoutSource_t {
+ TIMEOUT_SRC_ADVERTISING = 0x00, /**< Advertising timeout. */
+ TIMEOUT_SRC_SECURITY_REQUEST = 0x01, /**< Security request timeout. */
+ TIMEOUT_SRC_SCAN = 0x02, /**< Scanning timeout. */
+ TIMEOUT_SRC_CONN = 0x03, /**< Connection timeout. */
+ };
+
+ /**
+ * 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 {
+ CONNECTION_TIMEOUT = 0x08,
+ REMOTE_USER_TERMINATED_CONNECTION = 0x13,
+ REMOTE_DEV_TERMINATION_DUE_TO_LOW_RESOURCES = 0x14, /**< Remote Device Terminated Connection due to low resources.*/
+ REMOTE_DEV_TERMINATION_DUE_TO_POWER_OFF = 0x15, /**< Remote Device Terminated Connection due to power off. */
+ LOCAL_HOST_TERMINATED_CONNECTION = 0x16,
+ CONN_INTERVAL_UNACCEPTABLE = 0x3B,
+ };
+
+ /* Describes the current state of the device (more than one bit can be set) */
+ struct GapState_t {
+ unsigned advertising : 1; /**< peripheral is currently advertising */
+ unsigned connected : 1; /**< peripheral is connected to a central */
+ };
+
+ typedef uint16_t Handle_t; /* Type for connection handle. */
+
+ 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;
+
+ enum Role_t {
+ PERIPHERAL = 0x1, /**< Peripheral Role. */
+ CENTRAL = 0x2, /**< Central Role. */
+ };
+
+ struct AdvertisementCallbackParams_t {
+ Address_t peerAddr;
+ int8_t rssi;
+ bool isScanResponse;
+ GapAdvertisingParams::AdvertisingType_t type;
+ uint8_t advertisingDataLen;
+ const uint8_t *advertisingData;
+ };
+ typedef FunctionPointerWithContext<const AdvertisementCallbackParams_t *> AdvertisementReportCallback_t;
+
+ struct ConnectionCallbackParams_t {
+ Handle_t handle;
+ Role_t role;
+ AddressType_t peerAddrType;
+ Address_t peerAddr;
+ AddressType_t ownAddrType;
+ Address_t ownAddr;
+ const ConnectionParams_t *connectionParams;
+
+ ConnectionCallbackParams_t(Handle_t handleIn,
+ Role_t roleIn,
+ AddressType_t peerAddrTypeIn,
+ const uint8_t *peerAddrIn,
+ AddressType_t ownAddrTypeIn,
+ const uint8_t *ownAddrIn,
+ const ConnectionParams_t *connectionParamsIn) :
+ handle(handleIn),
+ role(roleIn),
+ peerAddrType(peerAddrTypeIn),
+ peerAddr(),
+ ownAddrType(ownAddrTypeIn),
+ ownAddr(),
+ connectionParams(connectionParamsIn) {
+ memcpy(peerAddr, peerAddrIn, ADDR_LEN);
+ memcpy(ownAddr, ownAddrIn, ADDR_LEN);
+ }
+ };
+
+ static const uint16_t UNIT_1_25_MS = 1250; /**< Number of microseconds in 1.25 milliseconds. */
+ static const uint16_t UNIT_0_625_MS = 625; /**< 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 ADVERTISEMENT_DURATION_UNITS_TO_MS(uint16_t gapUnits) {
+ return (gapUnits * UNIT_0_625_MS) / 1000;
+ }
+
+ typedef void (*TimeoutEventCallback_t)(TimeoutSource_t source);
+ typedef void (*ConnectionEventCallback_t)(const ConnectionCallbackParams_t *params);
+ typedef void (*DisconnectionEventCallback_t)(Handle_t, DisconnectionReason_t);
+ typedef void (*RadioNotificationEventCallback_t)(bool radio_active); /* gets passed true for ACTIVE; false for INACTIVE. */
+
+ /*
+ * The following functions are meant to be overridden in the platform-specific sub-class.
+ */
+public:
+ /**
+ * Set the BTLE MAC address and type. Please note that the address format is
+ * LSB (least significant byte first). Please refer to Address_t.
+ *
+ * @return BLE_ERROR_NONE on success.
+ */
+ virtual ble_error_t setAddress(AddressType_t type, const Address_t address) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Fetch the BTLE MAC address and type.
+ *
+ * @return BLE_ERROR_NONE on success.
+ */
+ virtual ble_error_t getAddress(AddressType_t *typeP, Address_t address) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * @return Minimum Advertising interval in milliseconds.
+ */
+ virtual uint16_t getMinAdvertisingInterval(void) const {
+ return 0; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * @return Minimum Advertising interval in milliseconds for non-connectible mode.
+ */
+ virtual uint16_t getMinNonConnectableAdvertisingInterval(void) const {
+ return 0; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * @return Maximum Advertising interval in milliseconds.
+ */
+ virtual uint16_t getMaxAdvertisingInterval(void) const {
+ return 0xFFFF; /* default implementation; override this API if this capability is supported. */
+ }
+
+ virtual ble_error_t stopAdvertising(void) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Stop scanning. The current scanning parameters remain in effect.
+ *
+ * @retval BLE_ERROR_NONE if successfully stopped scanning procedure.
+ */
+ virtual ble_error_t stopScan() {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Create a connection (GAP Link Establishment).
+ *
+ * @param peerAddr
+ * 48-bit address, LSB format.
+ * @param peerAddrType
+ * Address type of the peer.
+ * @param connectionParams
+ * Connection parameters.
+ * @param scanParams
+ * Paramters to be used while scanning for the peer.
+ * @return BLE_ERROR_NONE if connection establishment procedure is started
+ * successfully. The connectionCallback (if set) will be invoked upon
+ * a connection event.
+ */
+ virtual ble_error_t connect(const Address_t peerAddr,
+ Gap::AddressType_t peerAddrType,
+ const ConnectionParams_t *connectionParams,
+ const GapScanningParams *scanParams) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * This call initiates the disconnection procedure, and its completion will
+ * be communicated to the application with an invocation of the
+ * disconnectionCallback.
+ *
+ * @param reason
+ * The reason for disconnection to be sent back to the peer.
+ */
+ virtual ble_error_t disconnect(Handle_t connectionHandle, DisconnectionReason_t reason) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * This call initiates the disconnection procedure, and its completion will
+ * be communicated to the application with an invocation of the
+ * disconnectionCallback.
+ *
+ * @param reason
+ * The reason for disconnection to be sent back to the peer.
+ *
+ * @note: this version of disconnect() doesn't take a connection handle. It
+ * will work reliably only for stacks which are limited to a single
+ * connection. This API should be considered *deprecated* in favour of the
+ * altertive which takes a connection handle. It will be dropped in the future.
+ */
+ virtual ble_error_t disconnect(DisconnectionReason_t reason) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Get the GAP peripheral preferred connection parameters. These are the
+ * defaults that the peripheral would like to have in a connection. The
+ * choice of the connection parameters is eventually up to the central.
+ *
+ * @param[out] params
+ * The structure where the parameters will be stored. Memory
+ * for this is owned by the caller.
+ *
+ * @return BLE_ERROR_NONE if the parameters were successfully filled into
+ * the given structure pointed to by params.
+ */
+ virtual ble_error_t getPreferredConnectionParams(ConnectionParams_t *params) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Set the GAP peripheral preferred connection parameters. These are the
+ * defaults that the peripheral would like to have in a connection. The
+ * choice of the connection parameters is eventually up to the central.
+ *
+ * @param[in] params
+ * The structure containing the desired parameters.
+ */
+ virtual ble_error_t setPreferredConnectionParams(const ConnectionParams_t *params) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Update connection parameters while in the peripheral role.
+ * @details In the peripheral role, this will send the corresponding L2CAP request to the connected peer and wait for
+ * the central to perform the procedure.
+ * @param[in] handle
+ * Connection Handle
+ * @param[in] params
+ * Pointer to desired connection parameters. If NULL is provided on a peripheral role,
+ * the parameters in the PPCP characteristic of the GAP service will be used instead.
+ */
+ virtual ble_error_t updateConnectionParams(Handle_t handle, const ConnectionParams_t *params) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Set the device name characteristic in the GAP service.
+ * @param[in] deviceName
+ * The new value for the device-name. This is a UTF-8 encoded, <b>NULL-terminated</b> string.
+ */
+ virtual ble_error_t setDeviceName(const uint8_t *deviceName) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Get the value of the device name characteristic in the GAP service.
+ * @param[out] deviceName
+ * Pointer to an empty buffer where the UTF-8 *non NULL-
+ * terminated* string will be placed. Set this
+ * value to NULL in order to obtain the deviceName-length
+ * from the 'length' parameter.
+ *
+ * @param[in/out] lengthP
+ * (on input) Length of the buffer pointed to by deviceName;
+ * (on output) the complete device name length (without the
+ * null terminator).
+ *
+ * @note If the device name is longer than the size of the supplied buffer,
+ * length will return the complete device name length, and not the
+ * number of bytes actually returned in deviceName. The application may
+ * use this information to retry with a suitable buffer size.
+ */
+ virtual ble_error_t getDeviceName(uint8_t *deviceName, unsigned *lengthP) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Set the appearance characteristic in the GAP service.
+ * @param[in] appearance
+ * The new value for the device-appearance.
+ */
+ virtual ble_error_t setAppearance(GapAdvertisingData::Appearance appearance) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Get the appearance characteristic in the GAP service.
+ * @param[out] appearance
+ * The new value for the device-appearance.
+ */
+ virtual ble_error_t getAppearance(GapAdvertisingData::Appearance *appearanceP) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Set the radio's transmit power.
+ * @param[in] txPower Radio transmit power in dBm.
+ */
+ virtual ble_error_t setTxPower(int8_t txPower) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /**
+ * Query the underlying stack for permitted arguments for setTxPower().
+ *
+ * @param[out] valueArrayPP
+ * Out parameter to receive the immutable array of Tx values.
+ * @param[out] countP
+ * Out parameter to receive the array's size.
+ */
+ virtual void getPermittedTxPowerValues(const int8_t **valueArrayPP, size_t *countP) {
+ *countP = 0; /* default implementation; override this API if this capability is supported. */
+ }
+
+protected:
+ /* Override the following in the underlying adaptation layer to provide the functionality of scanning. */
+ virtual ble_error_t startRadioScan(const GapScanningParams &scanningParams) {
+ return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
+ }
+
+ /*
+ * APIs with non-virtual implementations.
+ */
+public:
+ /**
+ * Returns the current GAP state of the device using a bitmask which
+ * describes whether the device is advertising and/or connected.
+ */
+ GapState_t getState(void) const {
+ return state;
+ }
+
+ /**
+ * Set the GAP advertising mode to use for this device.
+ */
+ void setAdvertisingType(GapAdvertisingParams::AdvertisingType_t advType) {
+ _advParams.setAdvertisingType(advType);
+ }
+
+ /**
+ * @param[in] interval
+ * Advertising interval in units of milliseconds. Advertising
+ * is disabled if interval is 0. If interval is smaller than
+ * the minimum supported value, then the minimum supported
+ * value is used instead. This minimum value can be discovered
+ * using getMinAdvertisingInterval().
+ *
+ * This field must be set to 0 if connectionMode is equal
+ * to ADV_CONNECTABLE_DIRECTED.
+ *
+ * @note: Decreasing this value will allow central devices to detect a
+ * peripheral faster at the expense of more power being used by the radio
+ * due to the higher data transmit rate.
+ *
+ * @note: This API is now *deprecated* and will be dropped in the future.
+ * You should use the parallel API from Gap directly. A former call to
+ * ble.setAdvertisingInterval(...) should now be achieved using
+ * ble.gap().setAdvertisingInterval(...).
+ *
+ * @Note: [WARNING] This API previously used 0.625ms as the unit for its
+ * 'interval' argument. That required an explicit conversion from
+ * milliseconds using Gap::MSEC_TO_GAP_DURATION_UNITS(). This conversion is
+ * no longer required as the new units are milliseconds. Any application
+ * code depending on the old semantics would need to be updated accordingly.
+ */
+ void setAdvertisingInterval(uint16_t interval) {
+ if (interval == 0) {
+ stopAdvertising();
+ } else if (interval < getMinAdvertisingInterval()) {
+ interval = getMinAdvertisingInterval();
+ }
+ _advParams.setInterval(MSEC_TO_ADVERTISEMENT_DURATION_UNITS(interval));
+ }
+
+ /**
+ * @param[in] timeout
+ * Advertising timeout (in seconds) between 0x1 and 0x3FFF (1
+ * and 16383). Use 0 to disable the advertising timeout.
+ */
+ void setAdvertisingTimeout(uint16_t timeout) {
+ _advParams.setTimeout(timeout);
+ }
+
+ /**
+ * Start advertising.
+ */
+ ble_error_t startAdvertising(void) {
+ setAdvertisingData(); /* update the underlying stack */
+ return startAdvertising(_advParams);
+ }
+
+ /**
+ * Reset any advertising payload prepared from prior calls to
+ * accumulateAdvertisingPayload(). This automatically propagates the re-
+ * initialized adv payload to the underlying stack.
+ *
+ * Note: This should be followed by a call to setAdvertisingPayload() or
+ * startAdvertising() before the update takes effect.
+ */
+ void clearAdvertisingPayload(void) {
+ _advPayload.clear();
+ setAdvertisingData();
+ }
+
+ /**
+ * Accumulate an AD structure in the advertising payload. Please note that
+ * the payload is limited to 31 bytes. The SCAN_RESPONSE message may be used
+ * as an additional 31 bytes if the advertising payload proves to be too
+ * small.
+ *
+ * @param[in] flags
+ * The flags to be added. Please refer to
+ * GapAdvertisingData::Flags for valid flags. Multiple
+ * flags may be specified in combination.
+ */
+ ble_error_t accumulateAdvertisingPayload(uint8_t flags) {
+ ble_error_t rc;
+ if ((rc = _advPayload.addFlags(flags)) != BLE_ERROR_NONE) {
+ return rc;
+ }
+
+ return setAdvertisingData();
+ }
+
+ /**
+ * Accumulate an AD structure in the advertising payload. Please note that
+ * the payload is limited to 31 bytes. The SCAN_RESPONSE message may be used
+ * as an additional 31 bytes if the advertising payload proves to be too
+ * small.
+ *
+ * @param app
+ * The appearance of the peripheral.
+ */
+ ble_error_t accumulateAdvertisingPayload(GapAdvertisingData::Appearance app) {
+ setAppearance(app);
+
+ ble_error_t rc;
+ if ((rc = _advPayload.addAppearance(app)) != BLE_ERROR_NONE) {
+ return rc;
+ }
+
+ return setAdvertisingData();
+ }
+
+ /**
+ * Accumulate an AD structure in the advertising payload. Please note that
+ * the payload is limited to 31 bytes. The SCAN_RESPONSE message may be used
+ * as an additional 31 bytes if the advertising payload proves to be too
+ * small.
+ *
+ * @param app
+ * The max transmit power to be used by the controller. This is
+ * only a hint.
+ */
+ ble_error_t accumulateAdvertisingPayloadTxPower(int8_t power) {
+ ble_error_t rc;
+ if ((rc = _advPayload.addTxPower(power)) != BLE_ERROR_NONE) {
+ return rc;
+ }
+
+ return setAdvertisingData();
+ }
+
+ /**
+ * Accumulate a variable length byte-stream as an AD structure in the
+ * advertising payload. Please note that the payload is limited to 31 bytes.
+ * The SCAN_RESPONSE message may be used as an additional 31 bytes if the
+ * advertising payload proves to be too small.
+ *
+ * @param type The type which describes the variable length data.
+ * @param data data bytes.
+ * @param len length of data.
+ */
+ ble_error_t accumulateAdvertisingPayload(GapAdvertisingData::DataType type, const uint8_t *data, uint8_t len) {
+ if (type == GapAdvertisingData::COMPLETE_LOCAL_NAME) {
+ setDeviceName(data);
+ }
+
+ ble_error_t rc;
+ if ((rc = _advPayload.addData(type, data, len)) != BLE_ERROR_NONE) {
+ return rc;
+ }
+
+ return setAdvertisingData();
+ }
+
+ /**
+ * Setup a particular, user-constructed advertisement payload for the
+ * underlying stack. It would be uncommon for this API to be used directly;
+ * there are other APIs to build an advertisement payload (see above).
+ */
+ ble_error_t setAdvertisingPayload(const GapAdvertisingData &payload) {
+ _advPayload = payload;
+ return setAdvertisingData();
+ }
+
+ /**
+ * @return Read back advertising data. Useful for storing and
+ * restoring payload.
+ */
+ const GapAdvertisingData &getAdvertisingPayload(void) const {
+ return _advPayload;
+ }
+
+ /**
+ * Accumulate a variable length byte-stream as an AD structure in the
+ * scanResponse payload.
+ *
+ * @param[in] type The type which describes the variable length data.
+ * @param[in] data data bytes.
+ * @param[in] len length of data.
+ */
+ ble_error_t accumulateScanResponse(GapAdvertisingData::DataType type, const uint8_t *data, uint8_t len) {
+ ble_error_t rc;
+ if ((rc = _scanResponse.addData(type, data, len)) != BLE_ERROR_NONE) {
+ return rc;
+ }
+
+ return setAdvertisingData();
+ }
+
+ /**
+ * Reset any scan response prepared from prior calls to
+ * accumulateScanResponse().
+ *
+ * Note: This should be followed by a call to setAdvertisingPayload() or
+ * startAdvertising() before the update takes effect.
+ */
+ void clearScanResponse(void) {
+ _scanResponse.clear();
+ setAdvertisingData();
+ }
+
+ /**
+ * Setup parameters for GAP scanning--i.e. observer mode.
+ * @param[in] interval
+ * Scan interval (in milliseconds) [valid values lie between 2.5ms and 10.24s].
+ * @param[in] window
+ * Scan Window (in milliseconds) [valid values lie between 2.5ms and 10.24s].
+ * @param[in] timeout
+ * Scan timeout (in seconds) between 0x0001 and 0xFFFF, 0x0000 disables timeout.
+ * @param[in] activeScanning
+ * Set to True if active-scanning is required. This is used to fetch the
+ * scan response from a peer if possible.
+ *
+ * The scanning window divided by the interval determines the duty cycle for
+ * scanning. For example, if the interval is 100ms and the window is 10ms,
+ * then the controller will scan for 10 percent of the time. It is possible
+ * to have the interval and window set to the same value. In this case,
+ * scanning is continuous, with a change of scanning frequency once every
+ * interval.
+ *
+ * Once the scanning parameters have been configured, scanning can be
+ * enabled by using startScan().
+ *
+ * @Note: The scan interval and window are recommendations to the BLE stack.
+ */
+ ble_error_t setScanParams(uint16_t interval = GapScanningParams::SCAN_INTERVAL_MAX,
+ uint16_t window = GapScanningParams::SCAN_WINDOW_MAX,
+ uint16_t timeout = 0,
+ bool activeScanning = false) {
+ ble_error_t rc;
+ if (((rc = _scanningParams.setInterval(interval)) == BLE_ERROR_NONE) &&
+ ((rc = _scanningParams.setWindow(window)) == BLE_ERROR_NONE) &&
+ ((rc = _scanningParams.setTimeout(timeout)) == BLE_ERROR_NONE)) {
+ _scanningParams.setActiveScanning(activeScanning);
+ return BLE_ERROR_NONE;
+ }
+
+ return rc;
+ }
+
+ /**
+ * Setup the scanInterval parameter for GAP scanning--i.e. observer mode.
+ * @param[in] interval
+ * Scan interval (in milliseconds) [valid values lie between 2.5ms and 10.24s].
+ *
+ * The scanning window divided by the interval determines the duty cycle for
+ * scanning. For example, if the interval is 100ms and the window is 10ms,
+ * then the controller will scan for 10 percent of the time. It is possible
+ * to have the interval and window set to the same value. In this case,
+ * scanning is continuous, with a change of scanning frequency once every
+ * interval.
+ *
+ * Once the scanning parameters have been configured, scanning can be
+ * enabled by using startScan().
+ */
+ ble_error_t setScanInterval(uint16_t interval) {
+ return _scanningParams.setInterval(interval);
+ }
+
+ /**
+ * Setup the scanWindow parameter for GAP scanning--i.e. observer mode.
+ * @param[in] window
+ * Scan Window (in milliseconds) [valid values lie between 2.5ms and 10.24s].
+ *
+ * The scanning window divided by the interval determines the duty cycle for
+ * scanning. For example, if the interval is 100ms and the window is 10ms,
+ * then the controller will scan for 10 percent of the time. It is possible
+ * to have the interval and window set to the same value. In this case,
+ * scanning is continuous, with a change of scanning frequency once every
+ * interval.
+ *
+ * Once the scanning parameters have been configured, scanning can be
+ * enabled by using startScan().
+ */
+ ble_error_t setScanWindow(uint16_t window) {
+ return _scanningParams.setWindow(window);
+ }
+
+ /**
+ * Setup parameters for GAP scanning--i.e. observer mode.
+ * @param[in] timeout
+ * Scan timeout (in seconds) between 0x0001 and 0xFFFF, 0x0000 disables timeout.
+ *
+ * Once the scanning parameters have been configured, scanning can be
+ * enabled by using startScan().
+ */
+ ble_error_t setScanTimeout(uint16_t timeout) {
+ return _scanningParams.setTimeout(timeout);
+ }
+
+ /**
+ * Setup parameters for GAP scanning--i.e. observer mode.
+ * @param[in] activeScanning
+ * Set to True if active-scanning is required. This is used to fetch the
+ * scan response from a peer if possible.
+ *
+ * Once the scanning parameters have been configured, scanning can be
+ * enabled by using startScan().
+ */
+ void setActiveScanning(bool activeScanning) {
+ _scanningParams.setActiveScanning(activeScanning);
+ }
+
+ /**
+ * Start scanning (Observer Procedure) based on the parameters currently in
+ * effect.
+ *
+ * @param[in] callback
+ * The application specific callback to be invoked upon
+ * receiving every advertisement report. This can be passed in
+ * as NULL, in which case scanning may not be enabled at all.
+ */
+ ble_error_t startScan(void (*callback)(const AdvertisementCallbackParams_t *params)) {
+ ble_error_t err = BLE_ERROR_NONE;
+ if (callback) {
+ if ((err = startRadioScan(_scanningParams)) == BLE_ERROR_NONE) {
+ onAdvertisementReport.attach(callback);
+ }
+ }
+
+ return err;
+ }
+
+ /**
+ * Same as above, but this takes an (object, method) pair for a callback.
+ */
+ template<typename T>
+ ble_error_t startScan(T *object, void (T::*callbackMember)(const AdvertisementCallbackParams_t *params)) {
+ ble_error_t err = BLE_ERROR_NONE;
+ if (object && callbackMember) {
+ if ((err = startRadioScan(_scanningParams)) == BLE_ERROR_NONE) {
+ onAdvertisementReport.attach(object, callbackMember);
+ }
+ }
+
+ return err;
+ }
+
+private:
+ ble_error_t setAdvertisingData(void) {
+ return setAdvertisingData(_advPayload, _scanResponse);
+ }
+
+private:
+ virtual ble_error_t setAdvertisingData(const GapAdvertisingData &, const GapAdvertisingData &) = 0;
+ virtual ble_error_t startAdvertising(const GapAdvertisingParams &) = 0;
+
+public:
+ /**
+ * Accessors to read back currently active advertising params.
+ */
+ GapAdvertisingParams &getAdvertisingParams(void) {
+ return _advParams;
+ }
+ const GapAdvertisingParams &getAdvertisingParams(void) const {
+ return _advParams;
+ }
+
+ /**
+ * Setup a particular, user-constructed set of advertisement parameters for
+ * the underlying stack. It would be uncommon for this API to be used
+ * directly; there are other APIs to tweak advertisement parameters
+ * individually.
+ */
+ void setAdvertisingParams(const GapAdvertisingParams &newParams) {
+ _advParams = newParams;
+ }
+
+ /* Event callback handlers. */
+public:
+ /**
+ * Setup a callback for timeout events. Refer to TimeoutSource_t for
+ * possible event types.
+ */
+ void onTimeout(TimeoutEventCallback_t callback) {timeoutCallback = callback;}
+
+ /**
+ * Setup a callback for connection events. Refer to ConnectionEventCallback_t.
+ */
+ void onConnection(ConnectionEventCallback_t callback) {connectionCallback = callback;}
+
+ /**
+ * Set the application callback for disconnection events.
+ * @param callback
+ * Pointer to the unique callback.
+ */
+ void onDisconnection(DisconnectionEventCallback_t callback) {disconnectionCallback = callback;}
+
+ /**
+ * Append to a chain of callbacks to be invoked upon disconnection; these
+ * callbacks receive no context and are therefore different from the
+ * disconnectionCallback callback.
+ * @param callback
+ * function pointer to be invoked upon disconnection; receives no context.
+ */
+ template<typename T>
+ void addToDisconnectionCallChain(T *tptr, void (T::*mptr)(void)) {disconnectionCallChain.add(tptr, mptr);}
+
+ /**
+ * Set the application callback for radio-notification events.
+ *
+ * Radio Notification is a feature that enables ACTIVE and INACTIVE
+ * (nACTIVE) signals from the stack that notify the application when the
+ * radio is in use. The signal is sent using software interrupt.
+ *
+ * The ACTIVE signal is sent before the Radio Event starts. The nACTIVE
+ * signal is sent at the end of the Radio Event. These signals can be used
+ * by the application programmer to synchronize application logic with radio
+ * activity. For example, the ACTIVE signal can be used to shut off external
+ * devices to manage peak current drawn during periods when the radio is on,
+ * or to trigger sensor data collection for transmission in the Radio Event.
+ *
+ * @param callback
+ * The application handler to be invoked in response to a radio
+ * ACTIVE/INACTIVE event.
+ */
+ virtual void onRadioNotification(RadioNotificationEventCallback_t callback) {radioNotificationCallback = callback;}
+
+protected:
+ Gap() :
+ _advParams(),
+ _advPayload(),
+ _scanningParams(),
+ _scanResponse(),
+ state(),
+ timeoutCallback(NULL),
+ connectionCallback(NULL),
+ disconnectionCallback(NULL),
+ radioNotificationCallback(),
+ onAdvertisementReport(),
+ disconnectionCallChain() {
+ _advPayload.clear();
+ _scanResponse.clear();
+ }
+
+ /* Entry points for the underlying stack to report events back to the user. */
+public:
+ void processConnectionEvent(Handle_t handle,
+ Role_t role,
+ AddressType_t peerAddrType,
+ const Address_t peerAddr,
+ AddressType_t ownAddrType,
+ const Address_t ownAddr,
+ const ConnectionParams_t *connectionParams) {
+ state.connected = 1;
+ if (connectionCallback) {
+ ConnectionCallbackParams_t callbackParams(handle, role, peerAddrType, peerAddr, ownAddrType, ownAddr, connectionParams);
+ connectionCallback(&callbackParams);
+ }
+ }
+
+ void processDisconnectionEvent(Handle_t handle, DisconnectionReason_t reason) {
+ state.connected = 0;
+ if (disconnectionCallback) {
+ disconnectionCallback(handle, reason);
+ }
+ disconnectionCallChain.call();
+ }
+
+ void processAdvertisementReport(const Address_t peerAddr,
+ int8_t rssi,
+ bool isScanResponse,
+ GapAdvertisingParams::AdvertisingType_t type,
+ uint8_t advertisingDataLen,
+ const uint8_t *advertisingData) {
+ AdvertisementCallbackParams_t params;
+ memcpy(params.peerAddr, peerAddr, ADDR_LEN);
+ params.rssi = rssi;
+ params.isScanResponse = isScanResponse;
+ params.type = type;
+ params.advertisingDataLen = advertisingDataLen;
+ params.advertisingData = advertisingData;
+ onAdvertisementReport.call(¶ms);
+ }
+
+ void processTimeoutEvent(TimeoutSource_t source) {
+ if (timeoutCallback) {
+ timeoutCallback(source);
+ }
+ }
+
+protected:
+ GapAdvertisingParams _advParams;
+ GapAdvertisingData _advPayload;
+ GapScanningParams _scanningParams;
+ GapAdvertisingData _scanResponse;
+
+ GapState_t state;
+
+protected:
+ TimeoutEventCallback_t timeoutCallback;
+ ConnectionEventCallback_t connectionCallback;
+ DisconnectionEventCallback_t disconnectionCallback;
+ RadioNotificationEventCallback_t radioNotificationCallback;
+ AdvertisementReportCallback_t onAdvertisementReport;
+ CallChain disconnectionCallChain;
+
+private:
+ /* disallow copy and assignment */
+ Gap(const Gap &);
+ Gap& operator=(const Gap &);
+};
+
+#endif // ifndef __GAP_H__
\ No newline at end of file