High level Bluetooth Low Energy API and radio abstraction layer
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Diff: services/DFUService.h
- Revision:
- 716:11b41f651697
- Parent:
- 715:6d415ac147aa
- Child:
- 717:3129b149a6b2
--- a/services/DFUService.h Thu Jul 02 09:06:11 2015 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,132 +0,0 @@ -/* 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. - */ - -#ifndef __BLE_DFU_SERVICE_H__ -#define __BLE_DFU_SERVICE_H__ - -#include "BLEDevice.h" -#include "UUID.h" - -extern "C" void bootloader_start(void); - -extern const uint8_t DFUServiceBaseUUID[]; -extern const uint16_t DFUServiceShortUUID; -extern const uint16_t DFUServiceControlCharacteristicShortUUID; - -extern const uint8_t DFUServiceUUID[]; -extern const uint8_t DFUServiceControlCharacteristicUUID[]; -extern const uint8_t DFUServicePacketCharacteristicUUID[]; - -/** -* @class DFUService -* @brief Device Firmware Update Service. -*/ -class DFUService { -public: - /** - * @brief Signature for the handover callback. The application may provide such a - * callback when setting up the DFU service, in which case it will be - * invoked before handing control over to the bootloader. - */ - typedef void (*ResetPrepare_t)(void); - -public: - /** - * @brief Adds Device Firmware Update service to an existing ble object. - * - * @param[ref] _ble - * BLEDevice object for the underlying controller. - * @param[in] _handoverCallback - * Application specific handover callback. - */ - DFUService(BLEDevice &_ble, ResetPrepare_t _handoverCallback = NULL) : - ble(_ble), - controlBytes(), - packetBytes(), - controlPoint(DFUServiceControlCharacteristicUUID, controlBytes, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY), - packet(DFUServicePacketCharacteristicUUID, packetBytes, SIZEOF_PACKET_BYTES, SIZEOF_PACKET_BYTES, - GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE) { - static bool serviceAdded = false; /* We should only ever need to add the DFU service once. */ - if (serviceAdded) { - return; - } - - /* Set an initial value for control bytes so that the application's DFUService can - * be distinguished from the real DFU service provided by the bootloader. */ - controlBytes[0] = 0xFF; - controlBytes[1] = 0xFF; - - GattCharacteristic *dfuChars[] = {&controlPoint, &packet}; - GattService dfuService(DFUServiceUUID, dfuChars, sizeof(dfuChars) / sizeof(GattCharacteristic *)); - - ble.addService(dfuService); - handoverCallback = _handoverCallback; - serviceAdded = true; - - ble.onDataWritten(this, &DFUService::onDataWritten); - } - - /** - * @brief get the handle for the value attribute of the control characteristic. - */ - uint16_t getControlHandle(void) const { - return controlPoint.getValueHandle(); - } - - /** - * @brief This callback allows the DFU service to receive the initial trigger to - * handover control to the bootloader; but first the application is given a - * chance to clean up. - * - * @param[in] params - * Information about the characterisitc being updated. - */ - virtual void onDataWritten(const GattCharacteristicWriteCBParams *params) { - if (params->charHandle == controlPoint.getValueHandle()) { - /* At present, writing anything will do the trick--this needs to be improved. */ - if (handoverCallback) { - handoverCallback(); - } - - bootloader_start(); - } - } - -private: - static const unsigned SIZEOF_CONTROL_BYTES = 2; - static const unsigned SIZEOF_PACKET_BYTES = 20; - - static ResetPrepare_t handoverCallback; /**< application specific handover callback. */ - -private: - BLEDevice &ble; - uint8_t controlBytes[SIZEOF_CONTROL_BYTES]; - uint8_t packetBytes[SIZEOF_PACKET_BYTES]; - - /**< Writing to the control characteristic triggers the handover to dfu- - * bootloader. At present, writing anything will do the trick--this needs - * to be improved. */ - WriteOnlyArrayGattCharacteristic<uint8_t, SIZEOF_CONTROL_BYTES> controlPoint; - - /**< The packet characteristic in this service doesn't do anything meaningful, but - * is only a placeholder to mimic the corresponding characteristic in the - * actual DFU service implemented by the bootloader. Without this, some - * FOTA clients might get confused as service definitions change after - * handing control over to the bootloader. */ - GattCharacteristic packet; -}; - -#endif /* #ifndef __BLE_DFU_SERVICE_H__*/ \ No newline at end of file