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;
+}
+