Diff: nRF51GattClient.h

Revision:

374:d57070489710

Parent:

372:758e9a3a346a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51GattClient.h	Mon Jul 06 10:21:01 2015 +0100
@@ -0,0 +1,157 @@
+/* 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 __NRF51822_GATT_CLIENT_H__
+#define __NRF51822_GATT_CLIENT_H__
+
+#include "ble/GattClient.h"
+#include "nRF51ServiceDiscovery.h"
+
+class nRF51GattClient : public GattClient
+{
+public:
+    static nRF51GattClient &getInstance();
+
+    /**
+     * Launch service discovery. Once launched, service discovery will remain
+     * active with callbacks being issued back into the application for matching
+     * services/characteristics. isActive() can be used to determine status; and
+     * a termination callback (if setup) will be invoked at the end. Service
+     * discovery can be terminated prematurely if needed using terminate().
+     *
+     * @param  connectionHandle
+     *           Handle for the connection with the peer.
+     * @param  sc
+     *           This is the application callback for 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 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 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 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.
+     *
+     * @Note     Using wildcard values for both service-UUID and characteristic-
+     *           UUID will result in complete service discovery--callbacks being
+     *           called for every service and characteristic.
+     *
+     * @return
+     *           BLE_ERROR_NONE if service discovery is launched successfully; else an appropriate error.
+     */
+    virtual ble_error_t launchServiceDiscovery(Gap::Handle_t                               connectionHandle,
+                                               ServiceDiscovery::ServiceCallback_t         sc = NULL,
+                                               ServiceDiscovery::CharacteristicCallback_t  cc = NULL,
+                                               const UUID                                 &matchingServiceUUID = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN),
+                                               const UUID                                 &matchingCharacteristicUUIDIn = UUID::ShortUUIDBytes_t(BLE_UUID_UNKNOWN));
+
+    virtual void onServiceDiscoveryTermination(ServiceDiscovery::TerminationCallback_t callback) {
+        discovery.onTermination(callback);
+    }
+
+    /**
+     * Is service-discovery currently active?
+     */
+    virtual bool isServiceDiscoveryActive(void) const {
+        return discovery.isActive();
+    }
+
+    /**
+     * Terminate an ongoing service-discovery. This should result in an
+     * invocation of the TerminationCallback if service-discovery is active.
+     */
+    virtual void terminateServiceDiscovery(void) {
+        discovery.terminate();
+    }
+
+    virtual ble_error_t read(Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, uint16_t offset) const {
+        uint32_t rc = sd_ble_gattc_read(connHandle, attributeHandle, offset);
+        if (rc == NRF_SUCCESS) {
+            return BLE_ERROR_NONE;
+        }
+        switch (rc) {
+            case NRF_ERROR_BUSY:
+                return BLE_STACK_BUSY;
+            case BLE_ERROR_INVALID_CONN_HANDLE:
+            case NRF_ERROR_INVALID_STATE:
+            case NRF_ERROR_INVALID_ADDR:
+            default:
+                return BLE_ERROR_INVALID_STATE;
+        }
+    }
+
+    virtual ble_error_t write(GattClient::WriteOp_t cmd, Gap::Handle_t connHandle, GattAttribute::Handle_t attributeHandle, size_t length, const uint8_t *value) const {
+        ble_gattc_write_params_t writeParams = { };
+        writeParams.write_op = cmd;
+        writeParams.handle   = attributeHandle;
+        writeParams.len      = length;
+        writeParams.p_value  = const_cast<uint8_t *>(value);
+
+        uint32_t rc = sd_ble_gattc_write(connHandle, &writeParams);
+        if (rc == NRF_SUCCESS) {
+            return BLE_ERROR_NONE;
+        }
+        switch (rc) {
+            case NRF_ERROR_BUSY:
+                return BLE_STACK_BUSY;
+            case BLE_ERROR_NO_TX_BUFFERS:
+                return BLE_ERROR_NO_MEM;
+            case BLE_ERROR_INVALID_CONN_HANDLE:
+            case NRF_ERROR_INVALID_STATE:
+            case NRF_ERROR_INVALID_ADDR:
+            default:
+                return BLE_ERROR_INVALID_STATE;
+        }
+    }
+
+public:
+    nRF51GattClient() : discovery(this) {
+        /* empty */
+    }
+
+    friend void bleGattcEventHandler(const ble_evt_t *p_ble_evt);
+
+private:
+    nRF51GattClient(const nRF51GattClient &);
+    const nRF51GattClient& operator=(const nRF51GattClient &);
+
+private:
+    nRF51ServiceDiscovery discovery;
+};
+
+#endif // ifndef __NRF51822_GATT_CLIENT_H__
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