Martin Woolley / microbit-dal

Solution for Bluetooth SIG hands-on training course

Dependencies:   BLE_API mbed-dev-bin nRF51822-bluetooth-mdw

Dependents:   microbit

Fork of microbit-dal-bluetooth-mdw_starter by Martin Woolley

source/bluetooth/MicroBitTemperatureService.cpp@82:91e085d6ad72, 2017-03-24 (annotated)

Committer:
bluetooth_mdw
Date:
Fri Mar 24 06:20:38 2017 +0000
Revision:
82:91e085d6ad72
Parent:
1:8aa5cdb4ab67 
Removed comment re: writing initial values to the Attribute Table. Added comments to onDataWritten. Removed solution details.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jonathan Austin 1:8aa5cdb4ab67 1 /*
Jonathan Austin 1:8aa5cdb4ab67 2 The MIT License (MIT)
Jonathan Austin 1:8aa5cdb4ab67 3
Jonathan Austin 1:8aa5cdb4ab67 4 Copyright (c) 2016 British Broadcasting Corporation.
Jonathan Austin 1:8aa5cdb4ab67 5 This software is provided by Lancaster University by arrangement with the BBC.
Jonathan Austin 1:8aa5cdb4ab67 6
Jonathan Austin 1:8aa5cdb4ab67 7 Permission is hereby granted, free of charge, to any person obtaining a
Jonathan Austin 1:8aa5cdb4ab67 8 copy of this software and associated documentation files (the "Software"),
Jonathan Austin 1:8aa5cdb4ab67 9 to deal in the Software without restriction, including without limitation
Jonathan Austin 1:8aa5cdb4ab67 10 the rights to use, copy, modify, merge, publish, distribute, sublicense,
Jonathan Austin 1:8aa5cdb4ab67 11 and/or sell copies of the Software, and to permit persons to whom the
Jonathan Austin 1:8aa5cdb4ab67 12 Software is furnished to do so, subject to the following conditions:
Jonathan Austin 1:8aa5cdb4ab67 13
Jonathan Austin 1:8aa5cdb4ab67 14 The above copyright notice and this permission notice shall be included in
Jonathan Austin 1:8aa5cdb4ab67 15 all copies or substantial portions of the Software.
Jonathan Austin 1:8aa5cdb4ab67 16
Jonathan Austin 1:8aa5cdb4ab67 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Jonathan Austin 1:8aa5cdb4ab67 18 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Jonathan Austin 1:8aa5cdb4ab67 19 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
Jonathan Austin 1:8aa5cdb4ab67 20 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Jonathan Austin 1:8aa5cdb4ab67 21 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
Jonathan Austin 1:8aa5cdb4ab67 22 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
Jonathan Austin 1:8aa5cdb4ab67 23 DEALINGS IN THE SOFTWARE.
Jonathan Austin 1:8aa5cdb4ab67 24 */
Jonathan Austin 1:8aa5cdb4ab67 25
Jonathan Austin 1:8aa5cdb4ab67 26 /**
Jonathan Austin 1:8aa5cdb4ab67 27 * Class definition for the custom MicroBit Temperature Service.
Jonathan Austin 1:8aa5cdb4ab67 28 * Provides a BLE service to remotely read the silicon temperature of the nRF51822.
Jonathan Austin 1:8aa5cdb4ab67 29 */
Jonathan Austin 1:8aa5cdb4ab67 30 #include "MicroBitConfig.h"
Jonathan Austin 1:8aa5cdb4ab67 31 #include "ble/UUID.h"
Jonathan Austin 1:8aa5cdb4ab67 32
Jonathan Austin 1:8aa5cdb4ab67 33 #include "MicroBitTemperatureService.h"
Jonathan Austin 1:8aa5cdb4ab67 34
Jonathan Austin 1:8aa5cdb4ab67 35 /**
Jonathan Austin 1:8aa5cdb4ab67 36 * Constructor.
Jonathan Austin 1:8aa5cdb4ab67 37 * Create a representation of the TemperatureService
Jonathan Austin 1:8aa5cdb4ab67 38 * @param _ble The instance of a BLE device that we're running on.
Jonathan Austin 1:8aa5cdb4ab67 39 * @param _thermometer An instance of MicroBitThermometer to use as our temperature source.
Jonathan Austin 1:8aa5cdb4ab67 40 */
Jonathan Austin 1:8aa5cdb4ab67 41 MicroBitTemperatureService::MicroBitTemperatureService(BLEDevice &_ble, MicroBitThermometer &_thermometer) :
Jonathan Austin 1:8aa5cdb4ab67 42 ble(_ble), thermometer(_thermometer)
Jonathan Austin 1:8aa5cdb4ab67 43 {
Jonathan Austin 1:8aa5cdb4ab67 44 // Create the data structures that represent each of our characteristics in Soft Device.
Jonathan Austin 1:8aa5cdb4ab67 45 GattCharacteristic temperatureDataCharacteristic(MicroBitTemperatureServiceDataUUID, (uint8_t *)&temperatureDataCharacteristicBuffer, 0,
Jonathan Austin 1:8aa5cdb4ab67 46 sizeof(temperatureDataCharacteristicBuffer), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
Jonathan Austin 1:8aa5cdb4ab67 47
Jonathan Austin 1:8aa5cdb4ab67 48 GattCharacteristic temperaturePeriodCharacteristic(MicroBitTemperatureServicePeriodUUID, (uint8_t *)&temperaturePeriodCharacteristicBuffer, 0,
Jonathan Austin 1:8aa5cdb4ab67 49 sizeof(temperaturePeriodCharacteristicBuffer), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE);
Jonathan Austin 1:8aa5cdb4ab67 50
Jonathan Austin 1:8aa5cdb4ab67 51 // Initialise our characteristic values.
Jonathan Austin 1:8aa5cdb4ab67 52 temperatureDataCharacteristicBuffer = 0;
Jonathan Austin 1:8aa5cdb4ab67 53 temperaturePeriodCharacteristicBuffer = thermometer.getPeriod();
Jonathan Austin 1:8aa5cdb4ab67 54
Jonathan Austin 1:8aa5cdb4ab67 55 // Set default security requirements
Jonathan Austin 1:8aa5cdb4ab67 56 temperatureDataCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
Jonathan Austin 1:8aa5cdb4ab67 57 temperaturePeriodCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL);
Jonathan Austin 1:8aa5cdb4ab67 58
Jonathan Austin 1:8aa5cdb4ab67 59 GattCharacteristic *characteristics[] = {&temperatureDataCharacteristic, &temperaturePeriodCharacteristic};
Jonathan Austin 1:8aa5cdb4ab67 60 GattService service(MicroBitTemperatureServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
Jonathan Austin 1:8aa5cdb4ab67 61
Jonathan Austin 1:8aa5cdb4ab67 62 ble.addService(service);
Jonathan Austin 1:8aa5cdb4ab67 63
Jonathan Austin 1:8aa5cdb4ab67 64 temperatureDataCharacteristicHandle = temperatureDataCharacteristic.getValueHandle();
Jonathan Austin 1:8aa5cdb4ab67 65 temperaturePeriodCharacteristicHandle = temperaturePeriodCharacteristic.getValueHandle();
Jonathan Austin 1:8aa5cdb4ab67 66
Jonathan Austin 1:8aa5cdb4ab67 67 ble.gattServer().write(temperatureDataCharacteristicHandle,(uint8_t *)&temperatureDataCharacteristicBuffer, sizeof(temperatureDataCharacteristicBuffer));
Jonathan Austin 1:8aa5cdb4ab67 68 ble.gattServer().write(temperaturePeriodCharacteristicHandle,(uint8_t *)&temperaturePeriodCharacteristicBuffer, sizeof(temperaturePeriodCharacteristicBuffer));
Jonathan Austin 1:8aa5cdb4ab67 69
Jonathan Austin 1:8aa5cdb4ab67 70 ble.onDataWritten(this, &MicroBitTemperatureService::onDataWritten);
Jonathan Austin 1:8aa5cdb4ab67 71 if (EventModel::defaultEventBus)
Jonathan Austin 1:8aa5cdb4ab67 72 EventModel::defaultEventBus->listen(MICROBIT_ID_THERMOMETER, MICROBIT_THERMOMETER_EVT_UPDATE, this, &MicroBitTemperatureService::temperatureUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE);
Jonathan Austin 1:8aa5cdb4ab67 73 }
Jonathan Austin 1:8aa5cdb4ab67 74
Jonathan Austin 1:8aa5cdb4ab67 75 /**
Jonathan Austin 1:8aa5cdb4ab67 76 * Temperature update callback
Jonathan Austin 1:8aa5cdb4ab67 77 */
Jonathan Austin 1:8aa5cdb4ab67 78 void MicroBitTemperatureService::temperatureUpdate(MicroBitEvent)
Jonathan Austin 1:8aa5cdb4ab67 79 {
Jonathan Austin 1:8aa5cdb4ab67 80 if (ble.getGapState().connected)
Jonathan Austin 1:8aa5cdb4ab67 81 {
Jonathan Austin 1:8aa5cdb4ab67 82 temperatureDataCharacteristicBuffer = thermometer.getTemperature();
Jonathan Austin 1:8aa5cdb4ab67 83 ble.gattServer().notify(temperatureDataCharacteristicHandle,(uint8_t *)&temperatureDataCharacteristicBuffer, sizeof(temperatureDataCharacteristicBuffer));
Jonathan Austin 1:8aa5cdb4ab67 84 }
Jonathan Austin 1:8aa5cdb4ab67 85 }
Jonathan Austin 1:8aa5cdb4ab67 86
Jonathan Austin 1:8aa5cdb4ab67 87 /**
Jonathan Austin 1:8aa5cdb4ab67 88 * Callback. Invoked when any of our attributes are written via BLE.
Jonathan Austin 1:8aa5cdb4ab67 89 */
Jonathan Austin 1:8aa5cdb4ab67 90 void MicroBitTemperatureService::onDataWritten(const GattWriteCallbackParams *params)
Jonathan Austin 1:8aa5cdb4ab67 91 {
Jonathan Austin 1:8aa5cdb4ab67 92 if (params->handle == temperaturePeriodCharacteristicHandle && params->len >= sizeof(temperaturePeriodCharacteristicBuffer))
Jonathan Austin 1:8aa5cdb4ab67 93 {
Jonathan Austin 1:8aa5cdb4ab67 94 temperaturePeriodCharacteristicBuffer = *((uint16_t *)params->data);
Jonathan Austin 1:8aa5cdb4ab67 95 thermometer.setPeriod(temperaturePeriodCharacteristicBuffer);
Jonathan Austin 1:8aa5cdb4ab67 96
Jonathan Austin 1:8aa5cdb4ab67 97 // The accelerometer will choose the nearest period to that requested that it can support
Jonathan Austin 1:8aa5cdb4ab67 98 // Read back the ACTUAL period it is using, and report this back.
Jonathan Austin 1:8aa5cdb4ab67 99 temperaturePeriodCharacteristicBuffer = thermometer.getPeriod();
Jonathan Austin 1:8aa5cdb4ab67 100 ble.gattServer().write(temperaturePeriodCharacteristicHandle, (const uint8_t *)&temperaturePeriodCharacteristicBuffer, sizeof(temperaturePeriodCharacteristicBuffer));
Jonathan Austin 1:8aa5cdb4ab67 101 }
Jonathan Austin 1:8aa5cdb4ab67 102 }
Jonathan Austin 1:8aa5cdb4ab67 103
Jonathan Austin 1:8aa5cdb4ab67 104
Jonathan Austin 1:8aa5cdb4ab67 105 const uint8_t MicroBitTemperatureServiceUUID[] = {
Jonathan Austin 1:8aa5cdb4ab67 106 0xe9,0x5d,0x61,0x00,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
Jonathan Austin 1:8aa5cdb4ab67 107 };
Jonathan Austin 1:8aa5cdb4ab67 108
Jonathan Austin 1:8aa5cdb4ab67 109 const uint8_t MicroBitTemperatureServiceDataUUID[] = {
Jonathan Austin 1:8aa5cdb4ab67 110 0xe9,0x5d,0x92,0x50,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
Jonathan Austin 1:8aa5cdb4ab67 111 };
Jonathan Austin 1:8aa5cdb4ab67 112
Jonathan Austin 1:8aa5cdb4ab67 113 const uint8_t MicroBitTemperatureServicePeriodUUID[] = {
Jonathan Austin 1:8aa5cdb4ab67 114 0xe9,0x5d,0x1b,0x25,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8
Jonathan Austin 1:8aa5cdb4ab67 115 };