Diff: source/nRF5xCharacteristicDescriptorDiscoverer.h

Revision:

563:9c4b96f7be8d

Child:

568:13b23a4b1f58

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/nRF5xCharacteristicDescriptorDiscoverer.h	Mon Jan 11 10:19:16 2016 +0000
@@ -0,0 +1,140 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 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 __NRF_CHARACTERISTIC_DESCRIPTOR_DISCOVERY_H__
+#define __NRF_CHARACTERISTIC_DESCRIPTOR_DISCOVERY_H__
+
+#include "ble/Gap.h"
+#include "ble/DiscoveredCharacteristic.h"
+#include "ble/CharacteristicDescriptorDiscovery.h"
+#include "ble/GattClient.h"
+#include "ble_gattc.h"
+
+/**
+ * @brief Manage the discovery of Characteristic descriptors 
+ * @details is a bridge beetween BLE API and nordic stack regarding Characteristic
+ * Descriptor discovery. The BLE API can launch, monitorate and ask for termination
+ * of a discovery. The nordic stack will provide new descriptors and indicate when
+ * the discovery is done
+ */
+class nRF5xCharacteristicDescriptorDiscoverer
+{
+    typedef CharacteristicDescriptorDiscovery::DiscoveryCallback_t DiscoveryCallback_t;
+    typedef CharacteristicDescriptorDiscovery::TerminationCallback_t TerminationCallback_t;
+
+public:
+    nRF5xCharacteristicDescriptorDiscoverer(size_t concurrentConnectionsCount = 3);
+
+    ~nRF5xCharacteristicDescriptorDiscoverer();
+
+    /**
+     * Launch a new characteristic descriptor discovery for a given 
+     * DiscoveredCharacteristic.
+     * @note: this will be called by BLE API side
+     */
+    ble_error_t launch(
+        const DiscoveredCharacteristic& characteristic, 
+        const DiscoveryCallback_t& callback,
+        const TerminationCallback_t& terminationCallback
+    );
+
+    /**
+     * @brief indicate if a characteristic descriptor discovery is active for a 
+     * given DiscoveredCharacteristic
+     * @note: this will be called by BLE API side
+     */
+    bool isActive(const DiscoveredCharacteristic& characteristic) const;
+
+    /**
+     * @brief reauest the termination of characteristic descriptor discovery 
+     * for a give DiscoveredCharacteristic
+     * @note: this will be called by BLE API side
+     */
+    void requestTerminate(const DiscoveredCharacteristic& characteristic);
+
+    /**
+     * @brief process descriptors discovered from the nordic stack
+     */
+    void process(uint16_t handle, const ble_gattc_evt_desc_disc_rsp_t& descriptors);
+
+    /**
+     * @brief Called by the nordic stack when the discovery is over.
+     */
+    void terminate(uint16_t handle, ble_error_t err);
+
+private:
+    nRF5xCharacteristicDescriptorDiscoverer(const nRF5xCharacteristicDescriptorDiscoverer&);
+    nRF5xCharacteristicDescriptorDiscoverer& operator=(const nRF5xCharacteristicDescriptorDiscoverer&);
+
+    struct Discovery {
+        Discovery() : characteristic(), onDiscovery(), onTerminate() { }
+
+        Discovery(const DiscoveredCharacteristic& c, const DiscoveryCallback_t& dCb, const TerminationCallback_t& tCb) : 
+            characteristic(c), 
+            onDiscovery(dCb), 
+            onTerminate(tCb) { 
+        }
+
+        DiscoveredCharacteristic characteristic;
+        DiscoveryCallback_t onDiscovery;
+        TerminationCallback_t onTerminate;
+
+        void process(GattAttribute::Handle_t handle, const UUID& uuid) { 
+            CharacteristicDescriptorDiscovery::DiscoveryCallbackParams_t params = { 
+                characteristic,
+                DiscoveredCharacteristicDescriptor(
+                    characteristic.getGattClient(),
+                    characteristic.getConnectionHandle(),
+                    handle,
+                    uuid
+                )
+            };
+            onDiscovery.call(&params);
+        }
+
+        void terminate(ble_error_t err) { 
+            CharacteristicDescriptorDiscovery::TerminationCallbackParams_t params = {
+                characteristic,
+                err
+            };
+            onTerminate.call(&params);
+        }
+
+        friend bool operator==(const Discovery& lhs, const Discovery& rhs) {
+            return lhs.characteristic == rhs.characteristic &&
+                lhs.onDiscovery == rhs.onDiscovery &&
+                lhs.onTerminate == rhs.onTerminate;
+        }
+
+        friend bool operator!=(const Discovery& lhs, const Discovery& rhs) {
+            return !(lhs == rhs);
+        }
+    };
+
+    Discovery* findRunningDiscovery(const DiscoveredCharacteristic& characteristic);
+    Discovery* findRunningDiscovery(const DiscoveredCharacteristic& characteristic) const;
+    Discovery* findRunningDiscovery(uint16_t handle);
+    void removeDiscovery(Discovery* discovery);
+    Discovery* getAvailableDiscoverySlot(); 
+    bool isConnectionInUse(uint16_t connHandle);
+    static ble_error_t gattc_descriptors_discover(uint16_t connection_handle, uint16_t start_handle, uint16_t end_handle); 
+
+
+    size_t maximumConcurrentConnectionsCount;
+    Discovery *discoveryRunning;
+};
+
+#endif /*__NRF_CHARACTERISTIC_DESCRIPTOR_DISCOVERY_H__*/
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