Diff: ble/DiscoveredCharacteristic.h

Revision:

1115:82d4a8a56d91

Parent:

1113:b6d999e7a73a

Child:

1116:9cb51490b3f7

--- a/ble/DiscoveredCharacteristic.h	Mon Jan 11 08:52:00 2016 +0000
+++ b/ble/DiscoveredCharacteristic.h	Mon Jan 11 08:52:01 2016 +0000
@@ -21,24 +21,10 @@
 #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.
+ * Structure for holding information about the service and the characteristics
+ * found during the discovery process.
  */
 class DiscoveredCharacteristic {
 public:
@@ -47,7 +33,7 @@
         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 _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. */
 
@@ -60,50 +46,36 @@
         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. */
     };
 
     /**
+     * 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.
      *
-     * @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
@@ -111,22 +83,14 @@
      */
     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
+     * @param  length
      *           The amount of data being written.
-     * @param[in]  value
+     * @param  value
      *           The bytes being written.
      *
      * @note   It is important to note that a write without response will generate
@@ -146,20 +110,20 @@
     /**
      * 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.
+     * @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.
+     * @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;
+    ble_error_t discoverDescriptors(DescriptorCallback_t callback, const UUID &matchingUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN)) const;
 
     /**
      * Perform a write procedure.
      *
-     * @param[in]  length
+     * @param  length
      *           The amount of data being written.
-     * @param[in]  value
+     * @param  value
      *           The bytes being written.
      *
      * @note   It is important to note that a write will generate
@@ -174,142 +138,36 @@
     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
+     * 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& onWrite) const;
+    ble_error_t write(uint16_t length, const uint8_t *value, const GattClient::WriteCallback_t& onRead) 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 {
+    const 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 {
+    const 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() {
+                                 valueHandle(GattAttribute::INVALID_HANDLE) {
         /* empty */
     }
 
@@ -321,7 +179,6 @@
     Properties_t             props;
     GattAttribute::Handle_t  declHandle;
     GattAttribute::Handle_t  valueHandle;
-    GattAttribute::Handle_t  lastHandle;
 
     Gap::Handle_t            connHandle;
 };