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Dependencies: BLE_API mbed-dev-bin nRF51822
Fork of microbit-dal by
MicroBitEventService.h
00001 /* 00002 The MIT License (MIT) 00003 00004 Copyright (c) 2016 British Broadcasting Corporation. 00005 This software is provided by Lancaster University by arrangement with the BBC. 00006 00007 Permission is hereby granted, free of charge, to any person obtaining a 00008 copy of this software and associated documentation files (the "Software"), 00009 to deal in the Software without restriction, including without limitation 00010 the rights to use, copy, modify, merge, publish, distribute, sublicense, 00011 and/or sell copies of the Software, and to permit persons to whom the 00012 Software is furnished to do so, subject to the following conditions: 00013 00014 The above copyright notice and this permission notice shall be included in 00015 all copies or substantial portions of the Software. 00016 00017 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00018 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00019 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00020 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00021 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 00022 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 00023 DEALINGS IN THE SOFTWARE. 00024 */ 00025 00026 #ifndef MICROBIT_EVENT_SERVICE_H 00027 #define MICROBIT_EVENT_SERVICE_H 00028 00029 #include "MicroBitConfig.h" 00030 #include "ble/BLE.h" 00031 #include "MicroBitEvent.h" 00032 #include "EventModel.h" 00033 00034 // UUIDs for our service and characteristics 00035 extern const uint8_t MicroBitEventServiceUUID[]; 00036 extern const uint8_t MicroBitEventServiceMicroBitEventCharacteristicUUID[]; 00037 extern const uint8_t MicroBitEventServiceClientEventCharacteristicUUID[]; 00038 extern const uint8_t MicroBitEventServiceMicroBitRequirementsCharacteristicUUID[]; 00039 extern const uint8_t MicroBitEventServiceClientRequirementsCharacteristicUUID[]; 00040 00041 struct EventServiceEvent 00042 { 00043 uint16_t type; 00044 uint16_t reason; 00045 }; 00046 00047 00048 /** 00049 * Class definition for a MicroBit BLE Event Service. 00050 * Provides a BLE gateway onto an Event Model. 00051 */ 00052 class MicroBitEventService : public MicroBitComponent 00053 { 00054 public: 00055 00056 /** 00057 * Constructor. 00058 * Create a representation of the EventService 00059 * @param _ble The instance of a BLE device that we're running on. 00060 * @param _messageBus An instance of an EventModel which events will be mirrored from. 00061 */ 00062 MicroBitEventService(BLEDevice &_ble, EventModel &_messageBus); 00063 00064 /** 00065 * Periodic callback from MicroBit scheduler. 00066 * If we're no longer connected, remove any registered Message Bus listeners. 00067 */ 00068 virtual void idleTick(); 00069 00070 /** 00071 * Callback. Invoked when any of our attributes are written via BLE. 00072 */ 00073 void onDataWritten(const GattWriteCallbackParams *params); 00074 00075 /** 00076 * Callback. Invoked when any events are sent on the microBit message bus. 00077 */ 00078 void onMicroBitEvent(MicroBitEvent evt); 00079 00080 /** 00081 * Read callback on microBitRequirements characteristic. 00082 * 00083 * Used to iterate through the events that the code on this micro:bit is interested in. 00084 */ 00085 void onRequirementsRead(GattReadAuthCallbackParams *params); 00086 00087 private: 00088 00089 // Bluetooth stack we're running on. 00090 BLEDevice &ble; 00091 EventModel &messageBus; 00092 00093 // memory for our event characteristics. 00094 EventServiceEvent clientEventBuffer; 00095 EventServiceEvent microBitEventBuffer; 00096 EventServiceEvent microBitRequirementsBuffer; 00097 EventServiceEvent clientRequirementsBuffer; 00098 00099 // handles on this service's characterisitics. 00100 GattAttribute::Handle_t microBitEventCharacteristicHandle; 00101 GattAttribute::Handle_t clientRequirementsCharacteristicHandle; 00102 GattAttribute::Handle_t clientEventCharacteristicHandle; 00103 GattCharacteristic *microBitRequirementsCharacteristic; 00104 00105 // Message bus offset last sent to the client... 00106 uint16_t messageBusListenerOffset; 00107 00108 }; 00109 00110 00111 #endif
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