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MicroBit.cpp
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 #include "MicroBitConfig.h" 00027 /* 00028 * The underlying Nordic libraries that support BLE do not compile cleanly with the stringent GCC settings we employ 00029 * If we're compiling under GCC, then we suppress any warnings generated from this code (but not the rest of the DAL) 00030 * The ARM cc compiler is more tolerant. We don't test __GNUC__ here to detect GCC as ARMCC also typically sets this 00031 * as a compatability option, but does not support the options used... 00032 */ 00033 #if !defined(__arm) 00034 #pragma GCC diagnostic ignored "-Wunused-function" 00035 #pragma GCC diagnostic push 00036 #pragma GCC diagnostic ignored "-Wunused-parameter" 00037 #endif 00038 00039 #include "MicroBit.h" 00040 00041 #include "nrf_soc.h" 00042 00043 /* 00044 * Return to our predefined compiler settings. 00045 */ 00046 #if !defined(__arm) 00047 #pragma GCC diagnostic pop 00048 #endif 00049 00050 #if CONFIG_ENABLED(MICROBIT_DBG) 00051 // We create and initialize to NULL here, but MicroBitSerial will automatically update this as needed in its constructor. 00052 RawSerial* SERIAL_DEBUG = NULL; 00053 #endif 00054 00055 /** 00056 * Constructor. 00057 * 00058 * Create a representation of a MicroBit device, which includes member variables 00059 * that represent various device drivers used to control aspects of the micro:bit. 00060 */ 00061 MicroBit::MicroBit() : 00062 serial(USBTX, USBRX), 00063 resetButton(MICROBIT_PIN_BUTTON_RESET), 00064 storage(), 00065 i2c(I2C_SDA0, I2C_SCL0), 00066 messageBus(), 00067 display(), 00068 buttonA(MICROBIT_PIN_BUTTON_A, MICROBIT_ID_BUTTON_A), 00069 buttonB(MICROBIT_PIN_BUTTON_B, MICROBIT_ID_BUTTON_B), 00070 buttonAB(MICROBIT_ID_BUTTON_A,MICROBIT_ID_BUTTON_B, MICROBIT_ID_BUTTON_AB), 00071 accelerometer(i2c), 00072 compass(i2c, accelerometer, storage), 00073 compassCalibrator(compass, accelerometer, display), 00074 thermometer(storage), 00075 io(MICROBIT_ID_IO_P0,MICROBIT_ID_IO_P1,MICROBIT_ID_IO_P2, 00076 MICROBIT_ID_IO_P3,MICROBIT_ID_IO_P4,MICROBIT_ID_IO_P5, 00077 MICROBIT_ID_IO_P6,MICROBIT_ID_IO_P7,MICROBIT_ID_IO_P8, 00078 MICROBIT_ID_IO_P9,MICROBIT_ID_IO_P10,MICROBIT_ID_IO_P11, 00079 MICROBIT_ID_IO_P12,MICROBIT_ID_IO_P13,MICROBIT_ID_IO_P14, 00080 MICROBIT_ID_IO_P15,MICROBIT_ID_IO_P16,MICROBIT_ID_IO_P19, 00081 MICROBIT_ID_IO_P20), 00082 bleManager(storage), 00083 radio(), 00084 ble(NULL) 00085 { 00086 // Clear our status 00087 status = 0; 00088 00089 // Bring up soft reset functionality as soon as possible. 00090 resetButton.mode(PullUp); 00091 resetButton.fall(this, &MicroBit::reset); 00092 } 00093 00094 /** 00095 * Post constructor initialisation method. 00096 * 00097 * This call will initialised the scheduler, memory allocator and Bluetooth stack. 00098 * 00099 * This is required as the Bluetooth stack can't be brought up in a 00100 * static context i.e. in a constructor. 00101 * 00102 * @code 00103 * uBit.init(); 00104 * @endcode 00105 * 00106 * @note This method must be called before user code utilises any functionality 00107 * contained by uBit. 00108 */ 00109 void MicroBit::init() 00110 { 00111 if (status & MICROBIT_INITIALIZED) 00112 return; 00113 00114 #if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR) 00115 // Bring up a nested heap allocator. 00116 microbit_create_nested_heap(MICROBIT_NESTED_HEAP_SIZE); 00117 #endif 00118 00119 // Bring up fiber scheduler. 00120 scheduler_init(messageBus); 00121 00122 // Seed our random number generator 00123 seedRandom(); 00124 00125 // Create an event handler to trap any handlers being created for I2C services. 00126 // We do this to enable initialisation of those services only when they're used, 00127 // which saves processor time, memeory and battery life. 00128 messageBus.listen(MICROBIT_ID_MESSAGE_BUS_LISTENER, MICROBIT_EVT_ANY, this, &MicroBit::onListenerRegisteredEvent); 00129 00130 status |= MICROBIT_INITIALIZED; 00131 00132 #if CONFIG_ENABLED(MICROBIT_BLE_PAIRING_MODE) 00133 // Test if we need to enter BLE pairing mode... 00134 int i=0; 00135 sleep(100); 00136 while (buttonA.isPressed() && buttonB.isPressed() && i<10) 00137 { 00138 sleep(100); 00139 i++; 00140 00141 if (i == 10) 00142 { 00143 #if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR) && CONFIG_ENABLED(MICROBIT_HEAP_REUSE_SD) 00144 microbit_create_heap(MICROBIT_SD_GATT_TABLE_START + MICROBIT_SD_GATT_TABLE_SIZE, MICROBIT_SD_LIMIT); 00145 #endif 00146 // Start the BLE stack, if it isn't already running. 00147 if (!ble) 00148 { 00149 bleManager.init(getName(), getSerial(), messageBus, true); 00150 ble = bleManager.ble; 00151 } 00152 00153 // Enter pairing mode, using the LED matrix for any necessary pairing operations 00154 bleManager.pairingMode(display, buttonA); 00155 } 00156 } 00157 #endif 00158 00159 // Attempt to bring up a second heap region, using unused memory normally reserved for Soft Device. 00160 #if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR) && CONFIG_ENABLED(MICROBIT_HEAP_REUSE_SD) 00161 #if CONFIG_ENABLED(MICROBIT_BLE_ENABLED) 00162 microbit_create_heap(MICROBIT_SD_GATT_TABLE_START + MICROBIT_SD_GATT_TABLE_SIZE, MICROBIT_SD_LIMIT); 00163 #else 00164 microbit_create_heap(MICROBIT_SRAM_BASE, MICROBIT_SD_LIMIT); 00165 #endif 00166 #endif 00167 00168 #if CONFIG_ENABLED(MICROBIT_BLE_ENABLED) 00169 // Start the BLE stack, if it isn't already running. 00170 if (!ble) 00171 { 00172 bleManager.init(getName(), getSerial(), messageBus, false); 00173 ble = bleManager.ble; 00174 } 00175 #endif 00176 } 00177 00178 /** 00179 * A listener to perform actions as a result of Message Bus reflection. 00180 * 00181 * In some cases we want to perform lazy instantiation of components, such as 00182 * the compass and the accelerometer, where we only want to add them to the idle 00183 * fiber when someone has the intention of using these components. 00184 */ 00185 void MicroBit::onListenerRegisteredEvent(MicroBitEvent evt) 00186 { 00187 switch(evt.value) 00188 { 00189 case MICROBIT_ID_BUTTON_AB: 00190 // A user has registered to receive events from the buttonAB multibutton. 00191 // Disable click events from being generated by ButtonA and ButtonB, and defer the 00192 // control of this to the multibutton handler. 00193 // 00194 // This way, buttons look independent unless a buttonAB is requested, at which 00195 // point button A+B clicks can be correclty handled without breaking 00196 // causal ordering. 00197 buttonA.setEventConfiguration(MICROBIT_BUTTON_SIMPLE_EVENTS); 00198 buttonB.setEventConfiguration(MICROBIT_BUTTON_SIMPLE_EVENTS); 00199 buttonAB.setEventConfiguration(MICROBIT_BUTTON_ALL_EVENTS); 00200 break; 00201 00202 case MICROBIT_ID_COMPASS: 00203 // A listener has been registered for the compass. 00204 // The compass uses lazy instantiation, we just need to read the data once to start it running. 00205 // Touch the compass through the heading() function to ensure it is calibrated. if it isn't this will launch any associated calibration algorithms. 00206 compass.heading(); 00207 00208 break; 00209 00210 case MICROBIT_ID_ACCELEROMETER: 00211 case MICROBIT_ID_GESTURE: 00212 // A listener has been registered for the accelerometer. 00213 // The accelerometer uses lazy instantiation, we just need to read the data once to start it running. 00214 accelerometer.updateSample(); 00215 break; 00216 00217 case MICROBIT_ID_THERMOMETER: 00218 // A listener has been registered for the thermometer. 00219 // The thermometer uses lazy instantiation, we just need to read the data once to start it running. 00220 thermometer.updateSample(); 00221 break; 00222 } 00223 }
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