rajarajan elango
/
mbed-os-example-ble-LED
Testing of Onboard Led using nRF control panel app in Android device.
Diff: source/main.cpp
- Revision:
- 74:51fde11a771f
- Parent:
- 44:df8adb3bc797
--- a/source/main.cpp Fri Dec 14 13:15:42 2018 +0000 +++ b/source/main.cpp Mon Jan 14 10:45:49 2019 +0000 @@ -18,111 +18,146 @@ #include <mbed.h> #include "ble/BLE.h" #include "LEDService.h" - -DigitalOut alivenessLED(LED1, 0); -DigitalOut actuatedLED(LED2, 0); - -const static char DEVICE_NAME[] = "LED"; -static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID}; +#include "pretty_printer.h" -static EventQueue eventQueue(/* event count */ 10 * EVENTS_EVENT_SIZE); - -LEDService *ledServicePtr; +const static char DEVICE_NAME[] = "LED"; -void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) -{ - (void) params; - BLE::Instance().gap().startAdvertising(); -} +static EventQueue event_queue(/* event count */ 10 * EVENTS_EVENT_SIZE); -void blinkCallback(void) -{ - alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */ -} +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) { } -/** - * This callback allows the LEDService to receive updates to the ledState Characteristic. - * - * @param[in] params - * Information about the characterisitc being updated. - */ -void onDataWrittenCallback(const GattWriteCallbackParams *params) { - if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) { - actuatedLED = *(params->data); + ~LEDDemo() { + delete _led_service; } -} -/** - * This function is called when the ble initialization process has failled - */ -void onBleInitError(BLE &ble, ble_error_t error) -{ - /* Initialization error handling should go here */ -} + 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(); + } -void printMacAddress() -{ - /* Print out device MAC address to the console*/ - Gap::AddressType_t addr_type; - Gap::Address_t address; - BLE::Instance().gap().getAddress(&addr_type, address); - printf("DEVICE MAC ADDRESS: "); - for (int i = 5; i >= 1; i--){ - printf("%02x:", address[i]); - } - printf("%02x\r\n", address[0]); -} +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; + } -/** - * Callback triggered when the ble initialization process has finished - */ -void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) -{ - BLE& ble = params->ble; - ble_error_t error = params->error; + _led_service = new LEDService(_ble, false); + + _ble.gattServer().onDataWritten(this, &LEDDemo::on_data_written); - if (error != BLE_ERROR_NONE) { - /* In case of error, forward the error handling to onBleInitError */ - onBleInitError(ble, error); - return; + print_mac_address(); + + start_advertising(); } - /* Ensure that it is the default instance of BLE */ - if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { - return; + 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; + } } - ble.gap().onDisconnection(disconnectionCallback); - ble.gattServer().onDataWritten(onDataWrittenCallback); + /** + * 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); + } + } - bool initialValueForLEDCharacteristic = false; - ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic); + void blink() { + _alive_led = !_alive_led; + } + +private: + /* Event handler */ - /* setup advertising */ - ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); - ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); - ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); - ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); - ble.gap().setAdvertisingInterval(1000); /* 1000ms. */ - ble.gap().startAdvertising(); + 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; - printMacAddress(); -} + UUID _led_uuid; + LEDService *_led_service; -void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) { - BLE &ble = BLE::Instance(); - eventQueue.call(Callback<void()>(&ble, &BLE::processEvents)); + 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() { - eventQueue.call_every(500, blinkCallback); + BLE &ble = BLE::Instance(); + ble.onEventsToProcess(schedule_ble_events); - BLE &ble = BLE::Instance(); - ble.onEventsToProcess(scheduleBleEventsProcessing); - ble.init(bleInitComplete); - - eventQueue.dispatch_forever(); + LEDDemo demo(ble, event_queue); + demo.start(); return 0; } +