main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2014 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include <events/mbed_events.h>
00018 #include <mbed.h>
00019 #include "ble/BLE.h"
00020 #include "ble/Gap.h"
00021 #include "ble/services/BatteryService.h"
00022 
00023 DigitalOut led1(LED1, 1);
00024 
00025 const static char     DEVICE_NAME[] = "BATTERY";
00026 static const uint16_t uuid16_list[] = {GattService::UUID_BATTERY_SERVICE};
00027 
00028 static uint8_t batteryLevel = 50;
00029 static BatteryService* batteryServicePtr;
00030 
00031 static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
00032 
00033 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00034 {
00035     BLE::Instance().gap().startAdvertising();
00036 }
00037 
00038 void updateSensorValue() {
00039     batteryLevel++;
00040     if (batteryLevel > 100) {
00041         batteryLevel = 20;
00042     }
00043 
00044     batteryServicePtr->updateBatteryLevel(batteryLevel);
00045 }
00046 
00047 void blinkCallback(void)
00048 {
00049     led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
00050 
00051     BLE &ble = BLE::Instance();
00052     if (ble.gap().getState().connected) {
00053         eventQueue.call(updateSensorValue);
00054     }
00055 }
00056 
00057 /**
00058  * This function is called when the ble initialization process has failled
00059  */
00060 void onBleInitError(BLE &ble, ble_error_t error)
00061 {
00062     /* Initialization error handling should go here */
00063 }
00064 
00065 /**
00066  * Callback triggered when the ble initialization process has finished
00067  */
00068 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00069 {
00070     BLE&        ble   = params->ble;
00071     ble_error_t error = params->error;
00072 
00073     if (error != BLE_ERROR_NONE) {
00074         /* In case of error, forward the error handling to onBleInitError */
00075         onBleInitError(ble, error);
00076         return;
00077     }
00078 
00079     /* Ensure that it is the default instance of BLE */
00080     if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
00081         return;
00082     }
00083 
00084     ble.gap().onDisconnection(disconnectionCallback);
00085 
00086     /* Setup primary service */
00087     batteryServicePtr = new BatteryService(ble, batteryLevel);
00088 
00089     /* Setup advertising */
00090     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00091     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *) uuid16_list, sizeof(uuid16_list));
00092     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *) DEVICE_NAME, sizeof(DEVICE_NAME));
00093     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00094     ble.gap().setAdvertisingInterval(1000); /* 1000ms */
00095     ble.gap().startAdvertising();
00096 }
00097 
00098 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
00099     BLE &ble = BLE::Instance();
00100     eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
00101 }
00102 
00103 int main()
00104 {
00105     eventQueue.call_every(500, blinkCallback);
00106 
00107     BLE &ble = BLE::Instance();
00108     ble.onEventsToProcess(scheduleBleEventsProcessing);
00109     ble.init(bleInitComplete);
00110 
00111     eventQueue.dispatch_forever();
00112 
00113     return 0;
00114 }