Diff: source/main.cpp

Revision:

3:7ad91f59dcfa

Parent:

2:6d171062f1e2

Child:

4:357e8a209777

--- a/source/main.cpp	Wed Oct 23 12:17:05 2019 +0000
+++ b/source/main.cpp	Wed Oct 23 12:57:13 2019 +0000
@@ -1,105 +1,157 @@
-#include "mbed.h"
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2014 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 "MPU9250.h"
+#include "ble/Gap.h"
+#include "ble/services/BatteryService.h"
+#include "pretty_printer.h"
+
+static DigitalOut led1(LED1, 1);
+
+const static char DEVICE_NAME[] = "BATTERY GROUP F";
+
+static events::EventQueue event_queue(/* event count */ 16 * EVENTS_EVENT_SIZE);
 
-DigitalOut led(LED1, 1);
-uint16_t customServiceUUID  = 0xA000;
-uint16_t readCharUUID       = 0xA001;
-uint16_t writeCharUUID      = 0xA002;
+class BatteryDemo : ble::Gap::EventHandler {
+public:
+    BatteryDemo(BLE &ble, events::EventQueue &event_queue) :
+        _ble(ble),
+        _event_queue(event_queue),
+        _battery_uuid(GattService::UUID_BATTERY_SERVICE),
+        _battery_level(50),
+        _battery_service(ble, _battery_level),
+        _adv_data_builder(_adv_buffer) { }
+
+    void start() {
+        _ble.gap().setEventHandler(this);
+
+        _ble.init(this, &BatteryDemo::on_init_complete);
+
+        _event_queue.call_every(500, this, &BatteryDemo::blink);
+        _event_queue.call_every(1000, this, &BatteryDemo::update_sensor_value);
+
+        _event_queue.dispatch_forever();
+    }
 
-const static char     DEVICE_NAME[]        = "ChangeMe!!"; // change this
-static const uint16_t uuid16_list[]        = {0xFFFF}; //Custom UUID, FFFF is reserved for development
+private:
+    /** Callback triggered when the ble initialization process has finished */
+    void on_init_complete(BLE::InitializationCompleteCallbackContext *params) {
+        if (params->error != BLE_ERROR_NONE) {
+            print_error(params->error, "Ble initialization failed.");
+            return;
+        }
+
+        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))
+        );
 
-/* Set Up custom Characteristics */
-static uint8_t readValue[10] = {0};
-ReadOnlyArrayGattCharacteristic<uint8_t, sizeof(readValue)> readChar(readCharUUID, readValue);
+        _adv_data_builder.setFlags();
+        _adv_data_builder.setLocalServiceList(mbed::make_Span(&_battery_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) {
+            print_error(error, "_ble.gap().setAdvertisingParameters() failed");
+            return;
+        }
 
-static uint8_t writeValue[10] = {0};
-WriteOnlyArrayGattCharacteristic<uint8_t, sizeof(writeValue)> writeChar(writeCharUUID, writeValue);
+        error = _ble.gap().setAdvertisingPayload(
+            ble::LEGACY_ADVERTISING_HANDLE,
+            _adv_data_builder.getAdvertisingData()
+        );
+
+        if (error) {
+            print_error(error, "_ble.gap().setAdvertisingPayload() failed");
+            return;
+        }
+
+        /* Start advertising */
+
+        error = _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
+
+        if (error) {
+            print_error(error, "_ble.gap().startAdvertising() failed");
+            return;
+        }
+    }
 
-/* Set up custom service */
-GattCharacteristic *characteristics[] = {&readChar, &writeChar};
-GattService        customService(customServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
+    void update_sensor_value() {
+        if (_ble.gap().getState().connected) {
+            _battery_level++;
+            if (_battery_level > 100) {
+                _battery_level = 20;
+            }
 
+            _battery_service.updateBatteryLevel(_battery_level);
+        }
+    }
+
+    void blink(void) {
+        led1 = !led1;
+    }
+
+private:
+    /* Event handler */
 
-/*
- *  Restart advertising when phone app disconnects
-*/
-void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *)
-{
-    BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising();
+    void onDisconnectionComplete(const ble::DisconnectionCompleteEvent&) {
+        _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
+    }
+
+private:
+    BLE &_ble;
+    events::EventQueue &_event_queue;
+
+    UUID _battery_uuid;
+
+    uint8_t _battery_level;
+    BatteryService _battery_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));
 }
 
-/*
- *  Handle writes to writeCharacteristic
-*/
-void writeCharCallback(const GattWriteCallbackParams *params)
+int main()
 {
-    /* Check to see what characteristic was written, by handle */
-    if(params->handle == writeChar.getValueHandle()) {
-        /* toggle LED if only 1 byte is written */
-        if(params->len == 1) {
-            led = params->data[0];
-            (params->data[0] == 0x00) ? printf("led on\n\r") : printf("led off\n\r"); // print led toggle
-        }
-        /* Print the data if more than 1 byte is written */
-        else {
-            printf("Data received: length = %d, data = 0x",params->len);
-            for(int x=0; x < params->len; x++) {
-                printf("%x", params->data[x]);
-            }
-            printf("\n\r");
-        }
-        /* Update the readChar with the value of writeChar */
-        BLE::Instance(BLE::DEFAULT_INSTANCE).gattServer().write(readChar.getValueHandle(), params->data, params->len);
-    }
-}
-/*
- * Initialization callback
- */
-void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
-{
-    BLE &ble          = params->ble;
-    ble_error_t error = params->error;
-
-    if (error != BLE_ERROR_NONE) {
-        return;
-    }
+    BLE &ble = BLE::Instance();
+    ble.onEventsToProcess(schedule_ble_events);
 
-    ble.gap().onDisconnection(disconnectionCallback);
-    ble.gattServer().onDataWritten(writeCharCallback);
-
-    /* Setup advertising */
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); // BLE only, no classic BT
-    ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); // advertising type
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); // add name
-    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); // UUID's broadcast in advertising packet
-    ble.gap().setAdvertisingInterval(100); // 100ms.
-
-    /* Add our custom service */
-    ble.addService(customService);
-
-    /* Start advertising */
-    ble.gap().startAdvertising();
-}
+    BatteryDemo demo(ble, event_queue);
+    demo.start();
 
-/*
- *  Main loop
-*/
-int main(void)
-{
-    /* initialize stuff */
-    printf("\n\r********* Starting Main Loop *********\n\r");
-
-    BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
-    ble.init(bleInitComplete);
-
-    /* SpinWait for initialization to complete. This is necessary because the
-     * BLE object is used in the main loop below. */
-    while (ble.hasInitialized()  == false) { /* spin loop */ }
-
-    /* Infinite loop waiting for BLE interrupt events */
-    while (true) {
-        ble.waitForEvent(); /* Save power */
-    }
+    return 0;
 }
\ No newline at end of file