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Version 1
Diff: source/main.cpp
- Revision:
- 0:ad26a5d97cd7
- Child:
- 1:a6b119bfa56b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/main.cpp Fri Aug 07 07:10:58 2020 +0000 @@ -0,0 +1,163 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <events/mbed_events.h> +#include <mbed.h> +#include "ble/BLE.h" +#include "LEDService.h" +#include "pretty_printer.h" + +const static char DEVICE_NAME[] = "LED"; + +static EventQueue event_queue(/* event count */ 10 * EVENTS_EVENT_SIZE); + +class LEDDemo : ble::Gap::EventHandler { +public: + LEDDemo(BLE &ble, events::EventQueue &event_queue) : + _ble(ble), + _event_queue(event_queue), + _alive_led(LED1, 1), + _actuated_led(LED2, 0), + _led_uuid(LEDService::LED_SERVICE_UUID), + _led_service(NULL), + _adv_data_builder(_adv_buffer) { } + + ~LEDDemo() { + delete _led_service; + } + + void start() { + _ble.gap().setEventHandler(this); + + _ble.init(this, &LEDDemo::on_init_complete); + + _event_queue.call_every(500, this, &LEDDemo::blink); + + _event_queue.dispatch_forever(); + } + +private: + /** Callback triggered when the ble initialization process has finished */ + void on_init_complete(BLE::InitializationCompleteCallbackContext *params) { + if (params->error != BLE_ERROR_NONE) { + printf("Ble initialization failed."); + return; + } + + _led_service = new LEDService(_ble, false); + + _ble.gattServer().onDataWritten(this, &LEDDemo::on_data_written); + + print_mac_address(); + + start_advertising(); + } + + void start_advertising() { + /* Create advertising parameters and payload */ + + ble::AdvertisingParameters adv_parameters( + ble::advertising_type_t::CONNECTABLE_UNDIRECTED, + ble::adv_interval_t(ble::millisecond_t(1000)) + ); + + _adv_data_builder.setFlags(); + _adv_data_builder.setLocalServiceList(mbed::make_Span(&_led_uuid, 1)); + _adv_data_builder.setName(DEVICE_NAME); + + /* Setup advertising */ + + ble_error_t error = _ble.gap().setAdvertisingParameters( + ble::LEGACY_ADVERTISING_HANDLE, + adv_parameters + ); + + if (error) { + printf("_ble.gap().setAdvertisingParameters() failed\r\n"); + return; + } + + error = _ble.gap().setAdvertisingPayload( + ble::LEGACY_ADVERTISING_HANDLE, + _adv_data_builder.getAdvertisingData() + ); + + if (error) { + printf("_ble.gap().setAdvertisingPayload() failed\r\n"); + return; + } + + /* Start advertising */ + + error = _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE); + + if (error) { + printf("_ble.gap().startAdvertising() failed\r\n"); + return; + } + } + + /** + * This callback allows the LEDService to receive updates to the ledState Characteristic. + * + * @param[in] params Information about the characterisitc being updated. + */ + void on_data_written(const GattWriteCallbackParams *params) { + if ((params->handle == _led_service->getValueHandle()) && (params->len == 1)) { + _actuated_led = *(params->data); + } + } + + void blink() { + _alive_led = !_alive_led; + } + +private: + /* Event handler */ + + void onDisconnectionComplete(const ble::DisconnectionCompleteEvent&) { + _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE); + } + +private: + BLE &_ble; + events::EventQueue &_event_queue; + DigitalOut _alive_led; + DigitalOut _actuated_led; + + UUID _led_uuid; + LEDService *_led_service; + + uint8_t _adv_buffer[ble::LEGACY_ADVERTISING_MAX_SIZE]; + ble::AdvertisingDataBuilder _adv_data_builder; +}; + +/** Schedule processing of events from the BLE middleware in the event queue. */ +void schedule_ble_events(BLE::OnEventsToProcessCallbackContext *context) { + event_queue.call(Callback<void()>(&context->ble, &BLE::processEvents)); +} + +int main() +{ + BLE &ble = BLE::Instance(); + ble.onEventsToProcess(schedule_ble_events); + + LEDDemo demo(ble, event_queue); + demo.start(); + + return 0; +} +