Marco Ferreira
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Bluetooth Low Energy
Diff: ble/DiscoveredCharacteristic.h
- Revision:
- 1131:692ddf04fc42
- Parent:
- 1116:9cb51490b3f7
- Child:
- 1134:d540a48f650d
--- a/ble/DiscoveredCharacteristic.h Tue Jan 12 19:47:52 2016 +0000
+++ b/ble/DiscoveredCharacteristic.h Wed Apr 06 19:13:46 2016 +0100
@@ -1,329 +1,186 @@
-/* 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 __DISCOVERED_CHARACTERISTIC_H__
-#define __DISCOVERED_CHARACTERISTIC_H__
-
-#include "UUID.h"
-#include "Gap.h"
-#include "GattAttribute.h"
-#include "GattClient.h"
-#include "CharacteristicDescriptorDiscovery.h"
-#include "ble/DiscoveredCharacteristicDescriptor.h"
-
-/**
- * @brief Representation of a characteristic discovered during a GattClient
- * discovery procedure (see GattClient::launchServiceDiscovery ).
- *
- * @detail Provide detailed informations about a discovered characteristic like:
- * - Its UUID (see #getUUID).
- * - The most important handles of the characteristic definition
- * (see #getDeclHandle, #getValueHandle, #getLastHandle )
- * - Its properties (see #getProperties).
- * This class also provide functions to operate on the characteristic:
- * - Read the characteristic value (see #read)
- * - Writing a characteristic value (see #write or #writeWoResponse)
- * - Discover descriptors inside the characteristic definition. These descriptors
- * extends the characteristic. More information about descriptor usage is
- * available in DiscoveredCharacteristicDescriptor class.
- */
-class DiscoveredCharacteristic {
-public:
- struct Properties_t {
- uint8_t _broadcast :1; /**< Broadcasting the value permitted. */
- uint8_t _read :1; /**< Reading the value permitted. */
- uint8_t _writeWoResp :1; /**< Writing the value with Write Command permitted. */
- uint8_t _write :1; /**< Writing the value with Write Request permitted. */
- uint8_t _notify :1; /**< Notifications of the value permitted. */
- uint8_t _indicate :1; /**< Indications of the value permitted. */
- uint8_t _authSignedWrite :1; /**< Writing the value with Signed Write Command permitted. */
-
- public:
- bool broadcast(void) const {return _broadcast; }
- bool read(void) const {return _read; }
- bool writeWoResp(void) const {return _writeWoResp; }
- bool write(void) const {return _write; }
- bool notify(void) const {return _notify; }
- bool indicate(void) const {return _indicate; }
- bool authSignedWrite(void) const {return _authSignedWrite;}
-
- /**
- * @brief "Equal to" operator for DiscoveredCharacteristic::Properties_t
- *
- * @param lhs[in] The left hand side of the equality expression
- * @param rhs[in] The right hand side of the equality expression
- *
- * @return true if operands are equals, false otherwise.
- */
- friend bool operator==(Properties_t lhs, Properties_t rhs) {
- return lhs._broadcast == rhs._broadcast &&
- lhs._read == rhs._read &&
- lhs._writeWoResp == rhs._writeWoResp &&
- lhs._write == rhs._write &&
- lhs._notify == rhs._notify &&
- lhs._indicate == rhs._indicate &&
- lhs._authSignedWrite == rhs._authSignedWrite;
- }
-
- /**
- * @brief "Not equal to" operator for DiscoveredCharacteristic::Properties_t
- *
- * @param lhs The right hand side of the expression
- * @param rhs The left hand side of the expression
- *
- * @return true if operands are not equals, false otherwise.
- */
- friend bool operator!=(Properties_t lhs, Properties_t rhs) {
- return !(lhs == rhs);
- }
-
- private:
- operator uint8_t() const; /* Disallow implicit conversion into an integer. */
- operator unsigned() const; /* Disallow implicit conversion into an integer. */
- };
-
- /**
- * Initiate (or continue) a read for the value attribute, optionally at a
- * given offset. If the characteristic or descriptor to be read is longer
- * than ATT_MTU - 1, this function must be called multiple times with
- * appropriate offset to read the complete value.
- *
- * @param offset[in] The position - in the characteristic value bytes stream - where
- * the read operation begin.
- *
- * @return BLE_ERROR_NONE if a read has been initiated, or
- * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
- * BLE_STACK_BUSY if some client procedure is already in progress, or
- * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
- */
- ble_error_t read(uint16_t offset = 0) const;
-
- /**
- * @brief Same as #read(uint16_t) const but allow the user to register a callback
- * which will be fired once the read is done.
- *
- * @param offset[in] The position - in the characteristic value bytes stream - where
- * the read operation begin.
- * @param onRead[in] Continuation of the read operation
- */
- ble_error_t read(uint16_t offset, const GattClient::ReadCallback_t& onRead) const;
-
- /**
- * Perform a write without response procedure.
- *
- * @param[in] length
- * The amount of data being written.
- * @param[in] value
- * The bytes being written.
- *
- * @note It is important to note that a write without response will generate
- * an onDataSent() callback when the packet has been transmitted. There
- * will be a BLE-stack specific limit to the number of pending
- * writeWoResponse operations; the user may want to use the onDataSent()
- * callback for flow-control.
- *
- * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
- * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
- * BLE_STACK_BUSY if some client procedure is already in progress, or
- * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
- * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
- */
- ble_error_t writeWoResponse(uint16_t length, const uint8_t *value) const;
-
- /**
- * Initiate a GATT Characteristic Descriptor Discovery procedure for descriptors within this characteristic.
- *
- * @param[in] onDescriptorDiscovered This callback will be called every time a descriptor is discovered
- * @param[in] onTermination This callback will be called when the discovery process is over.
- *
- * @return BLE_ERROR_NONE if descriptor discovery is launched successfully; else an appropriate error.
- */
- ble_error_t discoverDescriptors(const CharacteristicDescriptorDiscovery::DiscoveryCallback_t& onDescriptorDiscovered,
- const CharacteristicDescriptorDiscovery::TerminationCallback_t& onTermination) const;
-
- /**
- * Perform a write procedure.
- *
- * @param[in] length
- * The amount of data being written.
- * @param[in] value
- * The bytes being written.
- *
- * @note It is important to note that a write will generate
- * an onDataWritten() callback when the peer acknowledges the request.
- *
- * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
- * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
- * BLE_STACK_BUSY if some client procedure is already in progress, or
- * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
- * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
- */
- ble_error_t write(uint16_t length, const uint8_t *value) const;
-
- /**
- * Same as #write(uint16_t, const uint8_t *) const but register a callback
- * which will be called once the data has been written.
- *
- * @param[in] length The amount of bytes to write.
- * @param[in] value The bytes to write.
- * @param[in] onRead Continuation callback for the write operation
- */
- ble_error_t write(uint16_t length, const uint8_t *value, const GattClient::WriteCallback_t& onWrite) const;
-
- void setupLongUUID(UUID::LongUUIDBytes_t longUUID, UUID::ByteOrder_t order = UUID::MSB) {
- uuid.setupLong(longUUID, order);
- }
-
-public:
- /**
- * @brief Get the UUID of the discovered characteristic
- * @return the UUID of this characteristic
- */
- const UUID& getUUID(void) const {
- return uuid;
- }
-
- /**
- * @brief Get the properties of this characteristic
- * @return the set of properties of this characteristic
- */
- const Properties_t& getProperties(void) const {
- return props;
- }
-
- /**
- * @brief Get the declaration handle of this characteristic.
- * @detail The declaration handle is the first handle of a characteristic
- * definition. The value accessible at this handle contains the following
- * informations:
- * - The characteristics properties (see Properties_t). This value can
- * be accessed by using #getProperties .
- * - The characteristic value attribute handle. This field can be accessed
- * by using #getValueHandle .
- * - The characteristic UUID, this value can be accessed by using the
- * function #getUUID .
- * @return the declaration handle of this characteristic.
- */
- GattAttribute::Handle_t getDeclHandle(void) const {
- return declHandle;
- }
-
- /**
- * @brief Return the handle used to access the value of this characteristic.
- * @details This handle is the one provided in the characteristic declaration
- * value. Usually, it is equal to #getDeclHandle() + 1. But it is not always
- * the case. Anyway, users are allowed to use #getDeclHandle() + 1 to access
- * the value of a characteristic.
- * @return The handle to access the value of this characteristic.
- */
- GattAttribute::Handle_t getValueHandle(void) const {
- return valueHandle;
- }
-
- /**
- * @brief Return the last handle of the characteristic definition.
- * @details A Characteristic definition can contain a lot of handles:
- * - one for the declaration (see #getDeclHandle)
- * - one for the value (see #getValueHandle)
- * - zero of more for the characteristic descriptors.
- * This handle is the last handle of the characteristic definition.
- * @return The last handle of this characteristic definition.
- */
- GattAttribute::Handle_t getLastHandle(void) const {
- return lastHandle;
- }
-
- /**
- * @brief Return the GattClient which can operate on this characteristic.
- * @return The GattClient which can operate on this characteristic.
- */
- GattClient* getGattClient() {
- return gattc;
- }
-
- /**
- * @brief Return the GattClient which can operate on this characteristic.
- * @return The GattClient which can operate on this characteristic.
- */
- const GattClient* getGattClient() const {
- return gattc;
- }
-
- /**
- * @brief Return the connection handle to the GattServer which contain
- * this characteristic.
- * @return the connection handle to the GattServer which contain
- * this characteristic.
- */
- Gap::Handle_t getConnectionHandle() const {
- return connHandle;
- }
-
- /**
- * @brief "Equal to" operator for DiscoveredCharacteristic
- *
- * @param lhs[in] The left hand side of the equality expression
- * @param rhs[in] The right hand side of the equality expression
- *
- * @return true if operands are equals, false otherwise.
- */
- friend bool operator==(const DiscoveredCharacteristic& lhs, const DiscoveredCharacteristic& rhs) {
- return lhs.gattc == rhs.gattc &&
- lhs.uuid == rhs.uuid &&
- lhs.props == rhs.props &&
- lhs.declHandle == rhs.declHandle &&
- lhs.valueHandle == rhs.valueHandle &&
- lhs.lastHandle == rhs.lastHandle &&
- lhs.connHandle == rhs.connHandle;
- }
-
- /**
- * @brief "Not equal to" operator for DiscoveredCharacteristic
- *
- * @param lhs[in] The right hand side of the expression
- * @param rhs[in] The left hand side of the expression
- *
- * @return true if operands are not equals, false otherwise.
- */
- friend bool operator !=(const DiscoveredCharacteristic& lhs, const DiscoveredCharacteristic& rhs) {
- return !(lhs == rhs);
- }
-
-public:
- DiscoveredCharacteristic() : gattc(NULL),
- uuid(UUID::ShortUUIDBytes_t(0)),
- props(),
- declHandle(GattAttribute::INVALID_HANDLE),
- valueHandle(GattAttribute::INVALID_HANDLE),
- lastHandle(GattAttribute::INVALID_HANDLE),
- connHandle() {
- /* empty */
- }
-
-protected:
- GattClient *gattc;
-
-protected:
- UUID uuid;
- Properties_t props;
- GattAttribute::Handle_t declHandle;
- GattAttribute::Handle_t valueHandle;
- GattAttribute::Handle_t lastHandle;
-
- Gap::Handle_t connHandle;
-};
-
+/* 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 __DISCOVERED_CHARACTERISTIC_H__
+#define __DISCOVERED_CHARACTERISTIC_H__
+
+#include "UUID.h"
+#include "Gap.h"
+#include "GattAttribute.h"
+#include "GattClient.h"
+
+/**
+ * Structure for holding information about the service and the characteristics
+ * found during the discovery process.
+ */
+class DiscoveredCharacteristic {
+public:
+ struct Properties_t {
+ uint8_t _broadcast :1; /**< Broadcasting the value permitted. */
+ uint8_t _read :1; /**< Reading the value permitted. */
+ uint8_t _writeWoResp :1; /**< Writing the value with Write Command permitted. */
+ uint8_t _write :1; /**< Writing the value with Write Request permitted. */
+ uint8_t _notify :1; /**< Notications of the value permitted. */
+ uint8_t _indicate :1; /**< Indications of the value permitted. */
+ uint8_t _authSignedWrite :1; /**< Writing the value with Signed Write Command permitted. */
+
+ public:
+ bool broadcast(void) const {return _broadcast; }
+ bool read(void) const {return _read; }
+ bool writeWoResp(void) const {return _writeWoResp; }
+ bool write(void) const {return _write; }
+ bool notify(void) const {return _notify; }
+ bool indicate(void) const {return _indicate; }
+ bool authSignedWrite(void) const {return _authSignedWrite;}
+
+ private:
+ operator uint8_t() const; /* Disallow implicit conversion into an integer. */
+ operator unsigned() const; /* Disallow implicit conversion into an integer. */
+ };
+
+ /**
+ * Structure for holding information about the service and the characteristics
+ * found during the discovery process.
+ */
+ struct DiscoveredDescriptor {
+ GattAttribute::Handle_t handle; /**< Descriptor Handle. */
+ UUID uuid; /**< Descriptor UUID. */
+ };
+
+ /**
+ * Callback type for when a characteristic descriptor is found during descriptor-
+ * discovery. The receiving function is passed in a pointer to a
+ * DiscoveredDescriptor object which will remain valid for the lifetime
+ * of the callback. Memory for this object is owned by the BLE_API eventing
+ * framework. The application can safely make a persistent shallow-copy of
+ * this object in order to work with the characteristic beyond the callback.
+ */
+ typedef void (*DescriptorCallback_t)(const DiscoveredDescriptor *);
+
+ /**
+ * Initiate (or continue) a read for the value attribute, optionally at a
+ * given offset. If the characteristic or descriptor to be read is longer
+ * than ATT_MTU - 1, this function must be called multiple times with
+ * appropriate offset to read the complete value.
+ *
+ * @return BLE_ERROR_NONE if a read has been initiated, or
+ * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
+ * BLE_STACK_BUSY if some client procedure is already in progress, or
+ * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
+ */
+ ble_error_t read(uint16_t offset = 0) const;
+
+ ble_error_t read(uint16_t offset, const GattClient::ReadCallback_t& onRead) const;
+
+ /**
+ * Perform a write without response procedure.
+ *
+ * @param length
+ * The amount of data being written.
+ * @param value
+ * The bytes being written.
+ *
+ * @note It is important to note that a write without response will generate
+ * an onDataSent() callback when the packet has been transmitted. There
+ * will be a BLE-stack specific limit to the number of pending
+ * writeWoResponse operations; the user may want to use the onDataSent()
+ * callback for flow-control.
+ *
+ * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
+ * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
+ * BLE_STACK_BUSY if some client procedure is already in progress, or
+ * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
+ * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
+ */
+ ble_error_t writeWoResponse(uint16_t length, const uint8_t *value) const;
+
+ /**
+ * Initiate a GATT Characteristic Descriptor Discovery procedure for descriptors within this characteristic.
+ *
+ * @param callback
+ * @param matchingUUID
+ * Filter for descriptors. Defaults to wildcard which will discover all descriptors.
+ *
+ * @return BLE_ERROR_NONE if descriptor discovery is launched successfully; else an appropriate error.
+ */
+ ble_error_t discoverDescriptors(DescriptorCallback_t callback, const UUID &matchingUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) const;
+
+ /**
+ * Perform a write procedure.
+ *
+ * @param length
+ * The amount of data being written.
+ * @param value
+ * The bytes being written.
+ *
+ * @note It is important to note that a write will generate
+ * an onDataWritten() callback when the peer acknowledges the request.
+ *
+ * @retval BLE_ERROR_NONE Successfully started the Write procedure, or
+ * BLE_ERROR_INVALID_STATE if some internal state about the connection is invalid, or
+ * BLE_STACK_BUSY if some client procedure is already in progress, or
+ * BLE_ERROR_NO_MEM if there are no available buffers left to process the request, or
+ * BLE_ERROR_OPERATION_NOT_PERMITTED due to the characteristic's properties.
+ */
+ ble_error_t write(uint16_t length, const uint8_t *value) const;
+
+ /**
+ * Same as above but register the callback wich will be called once the data has been written
+ */
+ ble_error_t write(uint16_t length, const uint8_t *value, const GattClient::WriteCallback_t& onRead) const;
+
+ void setupLongUUID(UUID::LongUUIDBytes_t longUUID) {
+ uuid.setupLong(longUUID);
+ }
+
+public:
+ const UUID& getUUID(void) const {
+ return uuid;
+ }
+
+ const Properties_t& getProperties(void) const {
+ return props;
+ }
+
+ const GattAttribute::Handle_t& getDeclHandle(void) const {
+ return declHandle;
+ }
+ const GattAttribute::Handle_t& getValueHandle(void) const {
+ return valueHandle;
+ }
+
+public:
+ DiscoveredCharacteristic() : gattc(NULL),
+ uuid(UUID::ShortUUIDBytes_t(0)),
+ props(),
+ declHandle(GattAttribute::INVALID_HANDLE),
+ valueHandle(GattAttribute::INVALID_HANDLE) {
+ /* empty */
+ }
+
+protected:
+ GattClient *gattc;
+
+protected:
+ UUID uuid;
+ Properties_t props;
+ GattAttribute::Handle_t declHandle;
+ GattAttribute::Handle_t valueHandle;
+
+ Gap::Handle_t connHandle;
+};
+
#endif /*__DISCOVERED_CHARACTERISTIC_H__*/
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