BikeBatteryService.h

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 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 #ifndef __BLE_BATTERY_SERVICE_H__
00018 #define __BLE_BATTERY_SERVICE_H__
00019 
00020 #include "ble/BLE.h"
00021 
00022 /**
00023 * @class BatteryService
00024 * @brief BLE Battery Service. This service displays the battery level from 0% to 100%, represented as an 8bit number.
00025 * Service:  https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.battery_service.xml
00026 * Battery Level Char:  https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.battery_level.xml
00027 */
00028 class BatteryService {
00029 public:
00030 
00031     const static uint16_t BATTERY_SERVICE_UUID                = 0x3000;
00032     
00033     const static uint16_t BATTERY_LEVEL_1_CHARACTERISTIC_UUID = 0x3001;
00034     const static uint16_t BATTERY_LEVEL_2_CHARACTERISTIC_UUID = 0x3002;
00035     const static uint16_t BATTERY_LEVEL_3_CHARACTERISTIC_UUID = 0x3003;
00036 
00037     /**
00038      * @param[ref] _ble
00039      *               BLE object for the underlying controller.
00040      * @param[in] level
00041      *               8bit batterly level. Usually used to represent percentage of batterly charge remaining.
00042      */
00043     BatteryService (BLE &_ble, uint8_t level1 = 100, uint8_t level2 = 100, uint8_t level3 = 100) :
00044         ble(_ble),
00045         batteryLevel1(level1),
00046         batteryLevel2(level2),
00047         batteryLevel3(level3),
00048         batteryLevelCharacteristic1(BATTERY_LEVEL_1_CHARACTERISTIC_UUID, &batteryLevel1, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
00049         batteryLevelCharacteristic2(BATTERY_LEVEL_2_CHARACTERISTIC_UUID, &batteryLevel2, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
00050         batteryLevelCharacteristic3(BATTERY_LEVEL_3_CHARACTERISTIC_UUID, &batteryLevel3, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)
00051     {
00052 
00053         GattCharacteristic *charTable[] = {&batteryLevelCharacteristic1, &batteryLevelCharacteristic2, &batteryLevelCharacteristic3};
00054         GattService         batteryService(BATTERY_SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
00055 
00056         ble.gattServer().addService(batteryService);
00057         //printf("adress of _ble: %#x\n", &_ble);
00058         //printf("adress of ble: %#x\n", &ble);
00059     }
00060 
00061     /**
00062      * @brief Update the battery level with a new value. [Valid values lie between 0 and 100];
00063      * anything outside this range will be ignored.
00064      *
00065      * @param newLevel
00066      *              Update to battery level.
00067      */
00068     void updateBatteryLevel1(uint8_t newLevel) {
00069         //printf("try to update batlevel 1\n");
00070         if (newLevel != batteryLevel1)
00071         {
00072             batteryLevel1 = newLevel;
00073             ble.gattServer().write(batteryLevelCharacteristic1.getValueHandle(), &batteryLevel1, 1);
00074             //printf("BLE battery Level 1 update : %i\n", batteryLevel1);
00075             //printf("adress of ble: %#x\n", &ble);
00076         }
00077         
00078     }
00079     void updateBatteryLevel2(uint8_t newLevel) {
00080         if (newLevel != batteryLevel2)
00081         {
00082             batteryLevel2 = newLevel;
00083             ble.gattServer().write(batteryLevelCharacteristic2.getValueHandle(), &batteryLevel2, 1);
00084         }
00085     }
00086     void updateBatteryLevel3(uint8_t newLevel) {
00087         if (newLevel != batteryLevel3)
00088         {
00089             batteryLevel3 = newLevel;
00090             ble.gattServer().write(batteryLevelCharacteristic3.getValueHandle(), &batteryLevel3, 1);
00091             //printf("battery level updated\n");
00092         }
00093     }
00094 
00095 protected:
00096     BLE &ble;
00097     uint8_t    batteryLevel1;
00098     uint8_t    batteryLevel2;
00099     uint8_t    batteryLevel3;
00100     ReadOnlyGattCharacteristic<uint8_t> batteryLevelCharacteristic1;
00101     ReadOnlyGattCharacteristic<uint8_t> batteryLevelCharacteristic2;
00102     ReadOnlyGattCharacteristic<uint8_t> batteryLevelCharacteristic3;
00103 };
00104 
00105 #endif /* #ifndef __BLE_BATTERY_SERVICE_H__*/