Wang Xinglu
High level Bluetooth Low Energy API and radio abstraction layer
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BLE_API
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Bluetooth Low Energy
Diff: ble/GattClient.h
- Revision:
- 1164:7e84487d45fc
- Parent:
- 1156:e1ea38b576c6
- Child:
- 1179:4ab722f8dca0
--- a/ble/GattClient.h Wed Apr 06 19:14:51 2016 +0100
+++ b/ble/GattClient.h Wed Apr 06 19:14:53 2016 +0100
@@ -28,21 +28,52 @@
class GattClient {
public:
+ /**
+ * Type for the registered callbacks added to the data read callchain.
+ * Refer to GattClient::onDataRead().
+ */
typedef FunctionPointerWithContext<const GattReadCallbackParams*> ReadCallback_t;
+ /**
+ * Type for the data read event callchain. Refer to GattClient::onDataRead().
+ */
typedef CallChainOfFunctionPointersWithContext<const GattReadCallbackParams*> ReadCallbackChain_t;
+ /**
+ * Enumerator for write operations.
+ */
enum WriteOp_t {
GATT_OP_WRITE_REQ = 0x01, /**< Write request. */
GATT_OP_WRITE_CMD = 0x02, /**< Write command. */
};
+ /**
+ * Type for the registered callbacks added to the data write callchain.
+ * Refer to GattClient::onDataWrite().
+ */
typedef FunctionPointerWithContext<const GattWriteCallbackParams*> WriteCallback_t;
+ /**
+ * Type for the data write event callchain. Refer to GattClient::onDataWrite().
+ */
typedef CallChainOfFunctionPointersWithContext<const GattWriteCallbackParams*> WriteCallbackChain_t;
+ /**
+ * Type for the registered callbacks added to the update event callchain.
+ * Refer to GattClient::onHVX().
+ */
typedef FunctionPointerWithContext<const GattHVXCallbackParams*> HVXCallback_t;
+ /**
+ * Type for the update event callchain. Refer to GattClient::onHVX().
+ */
typedef CallChainOfFunctionPointersWithContext<const GattHVXCallbackParams*> HVXCallbackChain_t;
+ /**
+ * Type for the registered callbacks added to the shutdown callchain.
+ * Refer to GattClient::onShutdown().
+ */
typedef FunctionPointerWithContext<const GattClient *> GattClientShutdownCallback_t;
+ /**
+ * Type for the shutdown event callchain. Refer to GattClient::onShutown().
+ */
typedef CallChainOfFunctionPointersWithContext<const GattClient *> GattClientShutdownCallbackChain_t;
/*
@@ -56,40 +87,40 @@
* will be invoked at the end. Service discovery can be terminated prematurely,
* if needed, using terminateServiceDiscovery().
*
- * @param connectionHandle
- * Handle for the connection with the peer.
- * @param sc
- * This is the application callback for a matching service. Taken as
- * NULL by default. Note: service discovery may still be active
- * when this callback is issued; calling asynchronous BLE-stack
- * APIs from within this application callback might cause the
- * stack to abort service discovery. If this becomes an issue, it
- * may be better to make a local copy of the discoveredService and
- * wait for service discovery to terminate before operating on the
- * service.
- * @param cc
- * This is the application callback for a matching characteristic.
- * Taken as NULL by default. Note: service discovery may still be
- * active when this callback is issued; calling asynchronous
- * BLE-stack APIs from within this application callback might cause
- * the stack to abort service discovery. If this becomes an issue,
- * it may be better to make a local copy of the discoveredCharacteristic
- * and wait for service discovery to terminate before operating on the
- * characteristic.
- * @param matchingServiceUUID
- * UUID-based filter for specifying a service in which the application is
- * interested. By default it is set as the wildcard UUID_UNKNOWN,
- * in which case it matches all services. If characteristic-UUID
- * filter (below) is set to the wildcard value, then a service
- * callback will be invoked for the matching service (or for every
- * service if the service filter is a wildcard).
- * @param matchingCharacteristicUUIDIn
- * UUID-based filter for specifying characteristic in which the application
- * is interested. By default it is set as the wildcard UUID_UKNOWN
- * to match against any characteristic. If both service-UUID
- * filter and characteristic-UUID filter are used with non-wildcard
- * values, then only a single characteristic callback is
- * invoked for the matching characteristic.
+ * @param[in] connectionHandle
+ * Handle for the connection with the peer.
+ * @param[in] sc
+ * This is the application callback for a matching service. Taken as
+ * NULL by default. Note: service discovery may still be active
+ * when this callback is issued; calling asynchronous BLE-stack
+ * APIs from within this application callback might cause the
+ * stack to abort service discovery. If this becomes an issue, it
+ * may be better to make a local copy of the discoveredService and
+ * wait for service discovery to terminate before operating on the
+ * service.
+ * @param[in] cc
+ * This is the application callback for a matching characteristic.
+ * Taken as NULL by default. Note: service discovery may still be
+ * active when this callback is issued; calling asynchronous
+ * BLE-stack APIs from within this application callback might cause
+ * the stack to abort service discovery. If this becomes an issue,
+ * it may be better to make a local copy of the discoveredCharacteristic
+ * and wait for service discovery to terminate before operating on the
+ * characteristic.
+ * @param[in] matchingServiceUUID
+ * UUID-based filter for specifying a service in which the application is
+ * interested. By default it is set as the wildcard UUID_UNKNOWN,
+ * in which case it matches all services. If characteristic-UUID
+ * filter (below) is set to the wildcard value, then a service
+ * callback will be invoked for the matching service (or for every
+ * service if the service filter is a wildcard).
+ * @param[in] matchingCharacteristicUUIDIn
+ * UUID-based filter for specifying characteristic in which the application
+ * is interested. By default it is set as the wildcard UUID_UKNOWN
+ * to match against any characteristic. If both service-UUID
+ * filter and characteristic-UUID filter are used with non-wildcard
+ * values, then only a single characteristic callback is
+ * invoked for the matching characteristic.
*
* @note Using wildcard values for both service-UUID and characteristic-
* UUID will result in complete service discovery: callbacks being
@@ -126,20 +157,21 @@
* at the end. Service discovery can be terminated prematurely, if needed,
* using terminateServiceDiscovery().
*
- * @param connectionHandle
- * Handle for the connection with the peer.
- * @param sc
- * This is the application callback for a matching service. Note: service discovery may still be active
- * when this callback is issued; calling asynchronous BLE-stack
- * APIs from within this application callback might cause the
- * stack to abort service discovery. If this becomes an issue, it
- * may be better to make a local copy of the discoveredService and
- * wait for service discovery to terminate before operating on the
- * service.
- * @param matchingServiceUUID
- * UUID-based filter for specifying a service in which the application is
- * interested. By default it is set as the wildcard UUID_UNKNOWN,
- * in which case it matches all services.
+ * @param[in] connectionHandle
+ * Handle for the connection with the peer.
+ * @param[in] callback
+ * This is the application callback for a matching service.
+ * Note: service discovery may still be active
+ * when this callback is issued; calling asynchronous BLE-stack
+ * APIs from within this application callback might cause the
+ * stack to abort service discovery. If this becomes an issue, it
+ * may be better to make a local copy of the discoveredService and
+ * wait for service discovery to terminate before operating on the
+ * service.
+ * @param[in] matchingServiceUUID
+ * UUID-based filter for specifying a service in which the application is
+ * interested. By default it is set as the wildcard UUID_UNKNOWN,
+ * in which case it matches all services.
*
* @return
* BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
@@ -162,18 +194,19 @@
* at the end. Service discovery can be terminated prematurely, if needed,
* using terminateServiceDiscovery().
*
- * @param connectionHandle
- * Handle for the connection with the peer.
- * @param sc
- * This is the application callback for a matching service. Note: service discovery may still be active
- * when this callback is issued; calling asynchronous BLE-stack
- * APIs from within this application callback might cause the
- * stack to abort service discovery. If this becomes an issue, it
- * may be better to make a local copy of the discoveredService and
- * wait for service discovery to terminate before operating on the
- * service.
- * @param startHandle, endHandle
- * Handle range within which to limit the search.
+ * @param[in] connectionHandle
+ * Handle for the connection with the peer.
+ * @param[in] callback
+ * This is the application callback for a matching service.
+ * Note: service discovery may still be active
+ * when this callback is issued; calling asynchronous BLE-stack
+ * APIs from within this application callback might cause the
+ * stack to abort service discovery. If this becomes an issue, it
+ * may be better to make a local copy of the discoveredService and
+ * wait for service discovery to terminate before operating on the
+ * service.
+ * @param[in] startHandle, endHandle
+ * Handle range within which to limit the search.
*
* @return
* BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
@@ -192,7 +225,9 @@
}
/**
- * Is service-discovery currently active?
+ * Check if service-discovery is currently active.
+ *
+ * @return true if service-discovery is active, false otherwise.
*/
virtual bool isServiceDiscoveryActive(void) const {
return false; /* Requesting action from porters: override this API if this capability is supported. */
@@ -206,7 +241,19 @@
/* Requesting action from porters: override this API if this capability is supported. */
}
- /* Initiate a GATT Client read procedure by attribute-handle. */
+ /**
+ * Initiate a GATT Client read procedure by attribute-handle.
+ *
+ * @param[in] connHandle
+ * Handle for the connection with the peer.
+ * @param[in] attributeHandle
+ * Handle of the attribute to read data from.
+ * @param[in] offset
+ * The offset from the start of the attribute value to be read.
+ *
+ * @return
+ * BLE_ERROR_NONE if read procedure was successfully started.
+ */
virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
/* Avoid compiler warnings about unused variables. */
(void)connHandle;
@@ -231,6 +278,9 @@
* Length of the new value.
* @param[in] value
* New value being written.
+ *
+ * @return
+ * BLE_ERROR_NONE if write procedure was successfully started.
*/
virtual ble_error_t write(GattClient::WriteOp_t cmd,
Gap::Handle_t connHandle,
@@ -251,18 +301,28 @@
public:
/**
* Set up a callback for read response events.
- * It is possible to remove registered callbacks using
- * onDataRead().detach(callbackToRemove)
+ *
+ * @param[in] callback
+ * Event handler being registered.
+ *
+ * @note It is possible to chain together multiple onDataRead callbacks
+ * (potentially from different modules of an application).
+ *
+ * @note It is possible to unregister a callback using
+ * onDataRead().detach(callbackToRemove).
*/
void onDataRead(ReadCallback_t callback) {
onDataReadCallbackChain.add(callback);
}
/**
- * @brief provide access to the callchain of read callbacks
- * It is possible to register callbacks using onDataRead().add(callback);
- * It is possible to unregister callbacks using onDataRead().detach(callback)
- * @return The read callbacks chain
+ * @brief Provide access to the callchain of read event callbacks.
+ *
+ * @return A reference to the read event callback chain.
+ *
+ * @note It is possible to register callbacks using onDataRead().add(callback).
+ *
+ * @note It is possible to unregister callbacks using onDataRead().detach(callback).
*/
ReadCallbackChain_t& onDataRead() {
return onDataReadCallbackChain;
@@ -270,19 +330,27 @@
/**
* Set up a callback for write response events.
- * It is possible to remove registered callbacks using
+ *
+ * @param[in] callback
+ * Event handler being registered.
+ *
+ * @note It is possible to remove registered callbacks using
* onDataWritten().detach(callbackToRemove).
- * @Note: Write commands (issued using writeWoResponse) don't generate a response.
+ *
+ * @note Write commands (issued using writeWoResponse) don't generate a response.
*/
void onDataWritten(WriteCallback_t callback) {
onDataWriteCallbackChain.add(callback);
}
/**
- * @brief provide access to the callchain of data written callbacks
- * It is possible to register callbacks using onDataWritten().add(callback);
- * It is possible to unregister callbacks using onDataWritten().detach(callback)
- * @return The data written callbacks chain
+ * @brief Provide access to the callchain of data written callbacks.
+ *
+ * @return A reference to the data written callbacks chain.
+ *
+ * @note It is possible to register callbacks using onDataWritten().add(callback).
+ *
+ * @note It is possible to unregister callbacks using onDataWritten().detach(callback).
*/
WriteCallbackChain_t& onDataWritten() {
return onDataWriteCallbackChain;
@@ -290,10 +358,13 @@
/**
* Set up a callback for write response events.
- * @Note: Write commands (issued using writeWoResponse) don't generate a response.
+ *
+ * @param[in] callback
+ * Event handler being registered.
*
- * @note: This API is now *deprecated* and will be dropped in the future.
- * Please use onDataWritten() instead.
+ * @note Write commands (issued using writeWoResponse) don't generate a response.
+ *
+ * @deprecated Please use GattServer::onDataWritten() instead.
*/
void onDataWrite(WriteCallback_t callback) {
onDataWritten(callback);
@@ -301,6 +372,9 @@
/**
* Set up a callback for when serviceDiscovery terminates.
+ *
+ * @param[in] callback
+ * Event handler being registered.
*/
virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
(void)callback; /* Avoid compiler warnings about ununsed variables. */
@@ -309,18 +383,21 @@
}
/**
- * @brief launch discovery of descriptors for a given characteristic
+ * @brief Launch discovery of descriptors for a given characteristic.
+ *
* @details This function will discover all descriptors available for a
- * specific characteristic.
+ * specific characteristic.
*
- * @param characteristic[in] The characteristic targeted by this discovery
- * procedure
- * @param discoveryCallback[in] User function called each time a descriptor
- * is found during the procedure.
- * @param terminationCallback[in] User provided function which will be called
- * once the discovery procedure is terminating. This will get called when all
- * the descriptors have been discovered or if an error occur during the discovery
- * procedure.
+ * @param[in] characteristic
+ * The characteristic targeted by this discovery procedure.
+ * @param[in] discoveryCallback
+ * User function called each time a descriptor is found during
+ * the procedure.
+ * @param[in] terminationCallback
+ * User provided function which will be called once the
+ * discovery procedure is terminating. This will get called
+ * when all the descriptors have been discovered or if an
+ * error occur during the discovery procedure.
*
* @return
* BLE_ERROR_NONE if characteristic descriptor discovery is launched
@@ -338,10 +415,14 @@
}
/**
- * @brief Indicate if the discovery of characteristic descriptors is active for a given characteristic
- * or not.
- * @param characteristic[in] The characteristic concerned by the descriptors discovery.
- * @return true if a descriptors discovery is active for the characteristic in input; otherwise false.
+ * @brief Indicate if the discovery of characteristic descriptors is active
+ * for a given characteristic or not.
+ *
+ * @param[in] characteristic
+ * The characteristic concerned by the descriptors discovery.
+ *
+ * @return true if a descriptors discovery is active for the characteristic
+ * in input; otherwise false.
*/
virtual bool isCharacteristicDescriptorDiscoveryActive(const DiscoveredCharacteristic& characteristic) const
{
@@ -351,10 +432,13 @@
/**
* @brief Terminate an ongoing characteristic descriptor discovery.
+ *
* @details This should result in an invocation of the TerminationCallback if
- * the characteristic descriptor discovery is active.
- * @param characteristic[in] The characteristic on which the running descriptors
- * discovery should be stopped.
+ * the characteristic descriptor discovery is active.
+ *
+ * @param[in] characteristic
+ * The characteristic on which the running descriptors
+ * discovery should be stopped.
*/
virtual void terminateCharacteristicDescriptorDiscovery(const DiscoveredCharacteristic& characteristic) {
/* Requesting action from porter(s): override this API if this capability is supported. */
@@ -362,10 +446,12 @@
}
/**
- * Set up a callback for when the GATT client receives an update event
+ * Set up a callback for when the GATT Client receives an update event
* corresponding to a change in the value of a characteristic on the remote
- * GATT server.
- * It is possible to remove registered callbacks using onHVX().detach(callbackToRemove).
+ * GATT Server.
+ *
+ * @note It is possible to unregister callbacks using
+ * onHVX().detach(callbackToRemove).
*/
void onHVX(HVXCallback_t callback) {
onHVXCallbackChain.add(callback);
@@ -376,38 +462,60 @@
* GattClient instance is about to shutdown (possibly as a result of a call
* to BLE::shutdown()).
*
- * @Note: It is possible to chain together multiple onShutdown callbacks
- * (potentially from different modules of an application) to be notified
- * before the GattClient is shutdown.
+ * @param[in] callback
+ * Event handler being registered.
*
- * @Note: It is also possible to set up a callback into a member function of
- * some object.
+ * @note It is possible to chain together multiple onShutdown callbacks
+ * (potentially from different modules of an application) to be notified
+ * before the GattClient is shutdown.
*
- * @Note It is possible to unregister a callback using onShutdown().detach(callback)
+ * @note It is also possible to set up a callback into a member function of
+ * some object.
+ *
+ * @note It is possible to unregister a callback using onShutdown().detach(callback).
*/
void onShutdown(const GattClientShutdownCallback_t& callback) {
shutdownCallChain.add(callback);
}
+
+ /**
+ * Same as GattClient::onShutdown(), but allows the possibility to add an object
+ * reference and member function as handler for shutdown event
+ * callbacks.
+ *
+ * @param[in] objPtr
+ * Pointer to the object of a class defining the member callback
+ * function (@p memberPtr).
+ * @param[in] memberPtr
+ * The member callback (within the context of an object) to be
+ * invoked.
+ */
template <typename T>
void onShutdown(T *objPtr, void (T::*memberPtr)(void)) {
shutdownCallChain.add(objPtr, memberPtr);
}
/**
- * @brief provide access to the callchain of shutdown event callbacks
- * It is possible to register callbacks using onShutdown().add(callback);
- * It is possible to unregister callbacks using onShutdown().detach(callback)
- * @return The shutdown event callbacks chain
+ * @brief Provide access to the callchain of shutdown event callbacks.
+ *
+ * @return A reference to the shutdown event callbacks chain.
+ *
+ * @note It is possible to register callbacks using onShutdown().add(callback).
+ *
+ * @note It is possible to unregister callbacks using onShutdown().detach(callback).
*/
GattClientShutdownCallbackChain_t& onShutdown() {
return shutdownCallChain;
}
/**
- * @brief provide access to the callchain of HVX callbacks
- * It is possible to register callbacks using onHVX().add(callback);
- * It is possible to unregister callbacks using onHVX().detach(callback)
- * @return The HVX callbacks chain
+ * @brief provide access to the callchain of HVX callbacks.
+ *
+ * @return A reference to the HVX callbacks chain.
+ *
+ * @note It is possible to register callbacks using onHVX().add(callback).
+ *
+ * @note It is possible to unregister callbacks using onHVX().detach(callback).
*/
HVXCallbackChain_t& onHVX() {
return onHVXCallbackChain;
@@ -446,14 +554,41 @@
/* Entry points for the underlying stack to report events back to the user. */
public:
+ /**
+ * Helper function that notifies all registered handlers of an occurrence
+ * of a data read event. This function is meant to be called from the
+ * BLE stack specific implementation when a data read event occurs.
+ *
+ * @param[in] params
+ * The data read parameters passed to the registered
+ * handlers.
+ */
void processReadResponse(const GattReadCallbackParams *params) {
onDataReadCallbackChain(params);
}
+ /**
+ * Helper function that notifies all registered handlers of an occurrence
+ * of a data written event. This function is meant to be called from the
+ * BLE stack specific implementation when a data written event occurs.
+ *
+ * @param[in] params
+ * The data written parameters passed to the registered
+ * handlers.
+ */
void processWriteResponse(const GattWriteCallbackParams *params) {
onDataWriteCallbackChain(params);
}
+ /**
+ * Helper function that notifies all registered handlers of an occurrence
+ * of an update event. This function is meant to be called from the
+ * BLE stack specific implementation when an update event occurs.
+ *
+ * @param[in] params
+ * The update event parameters passed to the registered
+ * handlers.
+ */
void processHVXEvent(const GattHVXCallbackParams *params) {
if (onHVXCallbackChain) {
onHVXCallbackChain(params);
@@ -461,9 +596,25 @@
}
protected:
+ /**
+ * Callchain containing all registered callback handlers for data read
+ * events.
+ */
ReadCallbackChain_t onDataReadCallbackChain;
+ /**
+ * Callchain containing all registered callback handlers for data write
+ * events.
+ */
WriteCallbackChain_t onDataWriteCallbackChain;
+ /**
+ * Callchain containing all registered callback handlers for update
+ * events.
+ */
HVXCallbackChain_t onHVXCallbackChain;
+ /**
+ * Callchain containing all registered callback handlers for shutdown
+ * events.
+ */
GattClientShutdownCallbackChain_t shutdownCallChain;
private:
@@ -472,4 +623,4 @@
GattClient& operator=(const GattClient &);
};
-#endif // ifndef __GATT_CLIENT_H__
\ No newline at end of file
+#endif /* ifndef __GATT_CLIENT_H__ */
\ No newline at end of file