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 "mbed.h"
00018 #include "BLE.h"
00019 #include "BatteryService.h"
00020  
00021 DigitalOut led1(LED1, 1);
00022 
00023 const static char     DEVICE_NAME[] = "BATTERY";
00024 static const uint16_t uuid16_list[] = {GattService::UUID_BATTERY_SERVICE};
00025 
00026 static volatile bool  triggerSensorPolling = false;
00027 
00028 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00029 {
00030     (void)params;
00031     BLE::Instance().gap().startAdvertising(); // restart advertising
00032 }
00033  
00034 void blink(void)
00035 {
00036     led1 = !led1;
00037     triggerSensorPolling = true;
00038 }
00039 
00040 void onBleInitError(BLE &ble, ble_error_t error)
00041 {
00042     (void)ble;
00043     (void)error;
00044    /* Initialization error handling should go here */
00045 }
00046 
00047 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00048 {
00049     BLE&        ble   = params->ble;
00050     ble_error_t error = params->error;
00051 
00052     if (error != BLE_ERROR_NONE) {
00053         onBleInitError(ble, error);
00054         return;
00055     }
00056 
00057     if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
00058         return;
00059     }
00060 
00061     ble.gap().onDisconnection(disconnectionCallback);
00062 
00063     uint8_t batteryLevel = 50;
00064     BatteryService batteryService(ble, batteryLevel);
00065  
00066     /* setup advertising */
00067     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
00068     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *) uuid16_list, sizeof(uuid16_list));
00069     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *) DEVICE_NAME, sizeof(DEVICE_NAME));
00070     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00071     ble.setAdvertisingInterval(1000); /* 1000ms; in multiples of 0.625ms. */
00072     ble.startAdvertising();
00073  
00074     while (true) {
00075         // check for trigger from periodicCallback()
00076         if (triggerSensorPolling && ble.getGapState().connected) {
00077             triggerSensorPolling = false;
00078  
00079             // the magic battery processing
00080             batteryLevel++;
00081             if (batteryLevel > 100) {
00082                 batteryLevel = 20;
00083             }
00084  
00085             batteryService.updateBatteryLevel(batteryLevel);
00086         } else {
00087             ble.waitForEvent(); // low power wait for event
00088         }
00089     }
00090 }
00091 
00092 int main(void)
00093 {
00094     Ticker t;
00095     t.attach(blink, 1.0f);
00096  
00097     BLE::Instance().init(bleInitComplete);
00098 }
00099 
00100