add iBeacon functionality
Dependencies: BLE_API mbed-dev-bin nRF51822
Fork of microbit-dal by
Diff: source/bluetooth/MicroBitAccelerometerService.cpp
- Revision:
- 1:8aa5cdb4ab67
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/bluetooth/MicroBitAccelerometerService.cpp Thu Apr 07 01:33:22 2016 +0100 @@ -0,0 +1,121 @@ +/* +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. +*/ + +/** + * Class definition for the custom MicroBit Accelerometer Service. + * Provides a BLE service to remotely read the state of the accelerometer, and configure its behaviour. + */ +#include "MicroBitConfig.h" +#include "ble/UUID.h" + +#include "MicroBitAccelerometerService.h" + +/** + * Constructor. + * Create a representation of the AccelerometerService + * @param _ble The instance of a BLE device that we're running on. + * @param _accelerometer An instance of MicroBitAccelerometer. + */ +MicroBitAccelerometerService::MicroBitAccelerometerService(BLEDevice &_ble, MicroBitAccelerometer &_accelerometer) : + ble(_ble), accelerometer(_accelerometer) +{ + // Create the data structures that represent each of our characteristics in Soft Device. + GattCharacteristic accelerometerDataCharacteristic(MicroBitAccelerometerServiceDataUUID, (uint8_t *)accelerometerDataCharacteristicBuffer, 0, + sizeof(accelerometerDataCharacteristicBuffer), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY); + + GattCharacteristic accelerometerPeriodCharacteristic(MicroBitAccelerometerServicePeriodUUID, (uint8_t *)&accelerometerPeriodCharacteristicBuffer, 0, + sizeof(accelerometerPeriodCharacteristicBuffer), + GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE); + + // Initialise our characteristic values. + accelerometerDataCharacteristicBuffer[0] = 0; + accelerometerDataCharacteristicBuffer[1] = 0; + accelerometerDataCharacteristicBuffer[2] = 0; + accelerometerPeriodCharacteristicBuffer = accelerometer.getPeriod(); + + // Set default security requirements + accelerometerDataCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL); + accelerometerPeriodCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL); + + GattCharacteristic *characteristics[] = {&accelerometerDataCharacteristic, &accelerometerPeriodCharacteristic}; + GattService service(MicroBitAccelerometerServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *)); + + ble.addService(service); + + accelerometerDataCharacteristicHandle = accelerometerDataCharacteristic.getValueHandle(); + accelerometerPeriodCharacteristicHandle = accelerometerPeriodCharacteristic.getValueHandle(); + + ble.gattServer().write(accelerometerDataCharacteristicHandle,(uint8_t *)accelerometerDataCharacteristicBuffer, sizeof(accelerometerDataCharacteristicBuffer)); + ble.gattServer().write(accelerometerPeriodCharacteristicHandle, (const uint8_t *)&accelerometerPeriodCharacteristicBuffer, sizeof(accelerometerPeriodCharacteristicBuffer)); + + ble.onDataWritten(this, &MicroBitAccelerometerService::onDataWritten); + + if (EventModel::defaultEventBus) + EventModel::defaultEventBus->listen(MICROBIT_ID_ACCELEROMETER, MICROBIT_ACCELEROMETER_EVT_DATA_UPDATE, this, &MicroBitAccelerometerService::accelerometerUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE); +} + +/** + * Callback. Invoked when any of our attributes are written via BLE. + */ +void MicroBitAccelerometerService::onDataWritten(const GattWriteCallbackParams *params) +{ + if (params->handle == accelerometerPeriodCharacteristicHandle && params->len >= sizeof(accelerometerPeriodCharacteristicBuffer)) + { + accelerometerPeriodCharacteristicBuffer = *((uint16_t *)params->data); + accelerometer.setPeriod(accelerometerPeriodCharacteristicBuffer); + + // The accelerometer will choose the nearest period to that requested that it can support + // Read back the ACTUAL period it is using, and report this back. + accelerometerPeriodCharacteristicBuffer = accelerometer.getPeriod(); + ble.gattServer().write(accelerometerPeriodCharacteristicHandle, (const uint8_t *)&accelerometerPeriodCharacteristicBuffer, sizeof(accelerometerPeriodCharacteristicBuffer)); + } +} + +/** + * Accelerometer update callback + */ +void MicroBitAccelerometerService::accelerometerUpdate(MicroBitEvent) +{ + if (ble.getGapState().connected) + { + accelerometerDataCharacteristicBuffer[0] = accelerometer.getX(); + accelerometerDataCharacteristicBuffer[1] = accelerometer.getY(); + accelerometerDataCharacteristicBuffer[2] = accelerometer.getZ(); + + ble.gattServer().notify(accelerometerDataCharacteristicHandle,(uint8_t *)accelerometerDataCharacteristicBuffer, sizeof(accelerometerDataCharacteristicBuffer)); + } +} + +const uint8_t MicroBitAccelerometerServiceUUID[] = { + 0xe9,0x5d,0x07,0x53,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitAccelerometerServiceDataUUID[] = { + 0xe9,0x5d,0xca,0x4b,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitAccelerometerServicePeriodUUID[] = { + 0xe9,0x5d,0xfb,0x24,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +};