Diff: inc/bluetooth/MicroBitEventService.h

Revision:

1:8aa5cdb4ab67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/bluetooth/MicroBitEventService.h	Thu Apr 07 01:33:22 2016 +0100
@@ -0,0 +1,111 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 British Broadcasting Corporation.
+This software is provided by Lancaster University by arrangement with the BBC.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef MICROBIT_EVENT_SERVICE_H
+#define MICROBIT_EVENT_SERVICE_H
+
+#include "MicroBitConfig.h"
+#include "ble/BLE.h"
+#include "MicroBitEvent.h"
+#include "EventModel.h"
+
+// UUIDs for our service and characteristics
+extern const uint8_t  MicroBitEventServiceUUID[];
+extern const uint8_t  MicroBitEventServiceMicroBitEventCharacteristicUUID[];
+extern const uint8_t  MicroBitEventServiceClientEventCharacteristicUUID[];
+extern const uint8_t  MicroBitEventServiceMicroBitRequirementsCharacteristicUUID[];
+extern const uint8_t  MicroBitEventServiceClientRequirementsCharacteristicUUID[];
+
+struct EventServiceEvent
+{
+    uint16_t    type;
+    uint16_t    reason;
+};
+
+
+/**
+  * Class definition for a MicroBit BLE Event Service.
+  * Provides a BLE gateway onto an Event Model.
+  */
+class MicroBitEventService : public MicroBitComponent
+{
+    public:
+
+    /**
+      * Constructor.
+      * Create a representation of the EventService
+      * @param _ble The instance of a BLE device that we're running on.
+      * @param _messageBus An instance of an EventModel which events will be mirrored from.
+      */
+    MicroBitEventService(BLEDevice &_ble, EventModel &_messageBus);
+
+    /**
+     * Periodic callback from MicroBit scheduler.
+     * If we're no longer connected, remove any registered Message Bus listeners.
+     */
+    virtual void idleTick();
+
+    /**
+      * Callback. Invoked when any of our attributes are written via BLE.
+      */
+    void onDataWritten(const GattWriteCallbackParams *params);
+
+    /**
+      * Callback. Invoked when any events are sent on the microBit message bus.
+      */
+    void onMicroBitEvent(MicroBitEvent evt);
+
+    /**
+      * Read callback on microBitRequirements characteristic.
+      *
+      * Used to iterate through the events that the code on this micro:bit is interested in.
+      */
+    void onRequirementsRead(GattReadAuthCallbackParams *params);
+
+    private:
+
+    // Bluetooth stack we're running on.
+    BLEDevice           &ble;
+	EventModel	        &messageBus;
+
+    // memory for our event characteristics.
+    EventServiceEvent   clientEventBuffer;
+    EventServiceEvent   microBitEventBuffer;
+    EventServiceEvent   microBitRequirementsBuffer;
+    EventServiceEvent   clientRequirementsBuffer;
+
+    // handles on this service's characterisitics.
+    GattAttribute::Handle_t microBitEventCharacteristicHandle;
+    GattAttribute::Handle_t clientRequirementsCharacteristicHandle;
+    GattAttribute::Handle_t clientEventCharacteristicHandle;
+    GattCharacteristic *microBitRequirementsCharacteristic;
+
+    // Message bus offset last sent to the client...
+    uint16_t messageBusListenerOffset;
+
+};
+
+
+#endif