Solution for Bluetooth SIG hands-on training course
Dependencies: BLE_API mbed-dev-bin nRF51822-bluetooth-mdw
Fork of microbit-dal-bluetooth-mdw_starter by
MicroBitLEDService.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_LED_SERVICE_H 00027 #define MICROBIT_LED_SERVICE_H 00028 00029 #include "MicroBitConfig.h" 00030 #include "ble/BLE.h" 00031 #include "MicroBitDisplay.h" 00032 00033 // Defines the buffer size for scrolling text over BLE, hence also defines 00034 // the maximum string length that can be scrolled via the BLE service. 00035 #define MICROBIT_BLE_MAXIMUM_SCROLLTEXT 20 00036 00037 // UUIDs for our service and characteristics 00038 extern const uint8_t MicroBitLEDServiceUUID[]; 00039 extern const uint8_t MicroBitLEDServiceMatrixUUID[]; 00040 extern const uint8_t MicroBitLEDServiceTextUUID[]; 00041 extern const uint8_t MicroBitLEDServiceScrollingSpeedUUID[]; 00042 00043 00044 /** 00045 * Class definition for the custom MicroBit LED Service. 00046 * Provides a BLE service to remotely read and write the state of the LED display. 00047 */ 00048 class MicroBitLEDService 00049 { 00050 public: 00051 00052 /** 00053 * Constructor. 00054 * Create a representation of the LEDService 00055 * @param _ble The instance of a BLE device that we're running on. 00056 * @param _display An instance of MicroBitDisplay to interface with. 00057 */ 00058 MicroBitLEDService(BLEDevice &_ble, MicroBitDisplay &_display); 00059 00060 /** 00061 * Callback. Invoked when any of our attributes are written via BLE. 00062 */ 00063 void onDataWritten(const GattWriteCallbackParams *params); 00064 00065 /** 00066 * Callback. Invoked when any of our attributes are read via BLE. 00067 */ 00068 void onDataRead(GattReadAuthCallbackParams *params); 00069 00070 private: 00071 00072 // Bluetooth stack we're running on. 00073 BLEDevice &ble; 00074 MicroBitDisplay &display; 00075 00076 // memory for our 8 bit control characteristics. 00077 uint8_t matrixCharacteristicBuffer[5]; 00078 uint16_t scrollingSpeedCharacteristicBuffer; 00079 uint8_t textCharacteristicBuffer[MICROBIT_BLE_MAXIMUM_SCROLLTEXT]; 00080 00081 // Handles to access each characteristic when they are held by Soft Device. 00082 GattAttribute::Handle_t matrixCharacteristicHandle; 00083 GattAttribute::Handle_t textCharacteristicHandle; 00084 GattAttribute::Handle_t scrollingSpeedCharacteristicHandle; 00085 00086 // We hold a copy of the GattCharacteristic, as mbed's BLE API requires this to provide read callbacks (pity!). 00087 GattCharacteristic matrixCharacteristic; 00088 }; 00089 00090 00091 #endif
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