fork
Dependencies: BLE_API mbed-dev-bin nRF51822
Diff: source/bluetooth/MicroBitValueService.cpp
- Revision:
- 74:06ddfe5ccbea
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/bluetooth/MicroBitValueService.cpp Fri Nov 04 18:30:19 2022 +0000 @@ -0,0 +1,122 @@ +/* +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 MicroBit BLE Magnetometer Service. + * Provides access to live magnetometer data via BLE, and provides basic configuration options. + */ +#include "MicroBitConfig.h" +#include "ble/UUID.h" + +#include "MicroBitValueService.h" + +/** + * Constructor. + * Create a representation of the MagnetometerService. + * @param _ble The instance of a BLE device that we're running on. + * @param _compass An instance of MicroBitCompass to use as our Magnetometer source. + */ +MicroBitValueService::MicroBitValueService(BLEDevice &_ble, uint16_t *_value) : + ble(_ble), value(_value) +{ +#if CONFIG_ENABLED(MICROBIT_DBG) + if(SERIAL_DEBUG) SERIAL_DEBUG->printf("MicroBitValueService::MicroBitValueService value = %i\r\n", *value); +#endif + // Create the data structures that represent each of our characteristics in Soft Device. + + GattCharacteristic valueCharacteristic(MicroBitValueServiceDataUUID, (uint8_t *)&valueCharacteristicBuffer, 0, + sizeof(valueCharacteristicBuffer), + GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE); + + // Initialise our characteristic values. + valueCharacteristicBuffer = *value; + + // Set default security requirements + valueCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL); + + GattCharacteristic *characteristics[] = {&valueCharacteristic}; + GattService service(MicroBitValueServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *)); + + ble.addService(service); + + valueCharacteristicHandle = valueCharacteristic.getValueHandle(); + + ble.gattServer().write(valueCharacteristicHandle, (const uint8_t *)&valueCharacteristicBuffer, sizeof(valueCharacteristicBuffer)); + + ble.gattServer().onDataWritten(this, &MicroBitValueService::onDataWritten); + + if (EventModel::defaultEventBus) + { + EventModel::defaultEventBus->listen(MICROBIT_ID_VALUE, MICROBIT_VALUE_EVT_UPDATE, this, &MicroBitValueService::valueUpdate, MESSAGE_BUS_LISTENER_IMMEDIATE); + } +} + +/** + * Callback. Invoked when any of our attributes are written via BLE. + */ +void MicroBitValueService::onDataWritten(const GattWriteCallbackParams *params) +{ + + if (params->handle == valueCharacteristicHandle && params->len >= sizeof(valueCharacteristicBuffer)) + { + valueCharacteristicBuffer = *((uint16_t *)params->data); + *value = valueCharacteristicBuffer; + //MicroBitEvent e(41, MICROBIT_VALUE_EVT_UPDATE); + } +} + +/** + * Magnetometer update callback + */ +void MicroBitValueService::valueUpdate(MicroBitEvent) +{ + +#if CONFIG_ENABLED(MICROBIT_DBG) + if(SERIAL_DEBUG) SERIAL_DEBUG->printf("MicroBitValueService::valueUpdate\r\n"); +#endif + + if (ble.getGapState().connected) + { + valueCharacteristicBuffer = *value; + ble.gattServer().write(valueCharacteristicHandle, (const uint8_t *)&valueCharacteristicBuffer, sizeof(valueCharacteristicBuffer)); + } + +} + +const uint8_t MicroBitValueServiceUUID[] = { + 0xab,0x05,0xf2,0xd8,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitValueServiceDataUUID[] = { + 0xab,0x05,0xfb,0x11,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitValueServicePeriodUUID[] = { + 0xab,0x05,0x38,0x6c,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitValueServiceBearingUUID[] = { + 0xab,0x05,0x97,0x15,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; \ No newline at end of file