Sam Musso / BLE_API

I don't know why this is happening.

Fork of BLE_API by Bluetooth Low Energy

services/DFUService.h@526:caa67c3187a0, 2015-06-19 (annotated)

Committer:
rgrover1
Date:
Fri Jun 19 15:52:06 2015 +0100
Revision:
526:caa67c3187a0
Parent:
524:6e97ab392e2a
Child:
527:493185cebc03
Synchronized with git rev 9bcd7433

Author: Rohit Grover

Rename BLEDevice as BLE. Retain an alias to BLEDevice for the sake of compatibility with old code.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rohit Grover 118:620d28e7a1ba 1 /* mbed Microcontroller Library
Rohit Grover 118:620d28e7a1ba 2 * Copyright (c) 2006-2013 ARM Limited
Rohit Grover 118:620d28e7a1ba 3 *
Rohit Grover 118:620d28e7a1ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
Rohit Grover 118:620d28e7a1ba 5 * you may not use this file except in compliance with the License.
Rohit Grover 118:620d28e7a1ba 6 * You may obtain a copy of the License at
Rohit Grover 118:620d28e7a1ba 7 *
Rohit Grover 118:620d28e7a1ba 8 * http://www.apache.org/licenses/LICENSE-2.0
Rohit Grover 118:620d28e7a1ba 9 *
Rohit Grover 118:620d28e7a1ba 10 * Unless required by applicable law or agreed to in writing, software
Rohit Grover 118:620d28e7a1ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
Rohit Grover 118:620d28e7a1ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Rohit Grover 118:620d28e7a1ba 13 * See the License for the specific language governing permissions and
Rohit Grover 118:620d28e7a1ba 14 * limitations under the License.
Rohit Grover 118:620d28e7a1ba 15 */
Rohit Grover 118:620d28e7a1ba 16
Rohit Grover 118:620d28e7a1ba 17 #ifndef __BLE_DFU_SERVICE_H__
Rohit Grover 118:620d28e7a1ba 18 #define __BLE_DFU_SERVICE_H__
Rohit Grover 118:620d28e7a1ba 19
Rohit Grover 118:620d28e7a1ba 20 #include "BLEDevice.h"
Rohit Grover 118:620d28e7a1ba 21 #include "UUID.h"
Rohit Grover 118:620d28e7a1ba 22
Rohit Grover 118:620d28e7a1ba 23 extern "C" void bootloader_start(void);
Rohit Grover 118:620d28e7a1ba 24
Rohit Grover 118:620d28e7a1ba 25 extern const uint8_t DFUServiceBaseUUID[];
Rohit Grover 118:620d28e7a1ba 26 extern const uint16_t DFUServiceShortUUID;
Rohit Grover 118:620d28e7a1ba 27 extern const uint16_t DFUServiceControlCharacteristicShortUUID;
Rohit Grover 118:620d28e7a1ba 28
Rohit Grover 118:620d28e7a1ba 29 extern const uint8_t DFUServiceUUID[];
Rohit Grover 118:620d28e7a1ba 30 extern const uint8_t DFUServiceControlCharacteristicUUID[];
Rohit Grover 119:18684018b83e 31 extern const uint8_t DFUServicePacketCharacteristicUUID[];
Rohit Grover 118:620d28e7a1ba 32
mbedAustin 236:a77aefd88e78 33 /**
mbedAustin 236:a77aefd88e78 34 * @class DFUService
rgrover1 242:0e9201b67e2f 35 * @brief Device Firmware Update Service.
mbedAustin 236:a77aefd88e78 36 */
Rohit Grover 118:620d28e7a1ba 37 class DFUService {
Rohit Grover 118:620d28e7a1ba 38 public:
Rohit Grover 118:620d28e7a1ba 39 /**
rgrover1 242:0e9201b67e2f 40 * @brief Signature for the handover callback. The application may provide such a
Rohit Grover 118:620d28e7a1ba 41 * callback when setting up the DFU service, in which case it will be
Rohit Grover 119:18684018b83e 42 * invoked before handing control over to the bootloader.
Rohit Grover 118:620d28e7a1ba 43 */
Rohit Grover 118:620d28e7a1ba 44 typedef void (*ResetPrepare_t)(void);
Rohit Grover 118:620d28e7a1ba 45
Rohit Grover 118:620d28e7a1ba 46 public:
mbedAustin 236:a77aefd88e78 47 /**
rgrover1 242:0e9201b67e2f 48 * @brief Adds Device Firmware Update service to an existing ble object.
mbedAustin 236:a77aefd88e78 49 *
mbedAustin 236:a77aefd88e78 50 * @param[ref] _ble
mbedAustin 236:a77aefd88e78 51 * BLEDevice object for the underlying controller.
mbedAustin 236:a77aefd88e78 52 * @param[in] _handoverCallback
mbedAustin 236:a77aefd88e78 53 * Application specific handover callback.
mbedAustin 236:a77aefd88e78 54 */
Rohit Grover 118:620d28e7a1ba 55 DFUService(BLEDevice &_ble, ResetPrepare_t _handoverCallback = NULL) :
Rohit Grover 118:620d28e7a1ba 56 ble(_ble),
rgrover1 277:1407d2f1ce3c 57 controlPoint(DFUServiceControlCharacteristicUUID, controlBytes, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
Rohit Grover 119:18684018b83e 58 packet(DFUServicePacketCharacteristicUUID, packetBytes, SIZEOF_PACKET_BYTES, SIZEOF_PACKET_BYTES,
rgrover1 526:caa67c3187a0 59 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE),
rgrover1 526:caa67c3187a0 60 controlBytes(),
rgrover1 526:caa67c3187a0 61 packetBytes() {
Rohit Grover 118:620d28e7a1ba 62 static bool serviceAdded = false; /* We should only ever need to add the DFU service once. */
Rohit Grover 118:620d28e7a1ba 63 if (serviceAdded) {
Rohit Grover 118:620d28e7a1ba 64 return;
Rohit Grover 118:620d28e7a1ba 65 }
Rohit Grover 118:620d28e7a1ba 66
Rohit Grover 120:467527c1b943 67 /* Set an initial value for control bytes so that the application's DFUService can
Rohit Grover 120:467527c1b943 68 * be distinguished from the real DFU service provided by the bootloader. */
Rohit Grover 120:467527c1b943 69 controlBytes[0] = 0xFF;
Rohit Grover 120:467527c1b943 70 controlBytes[1] = 0xFF;
Rohit Grover 120:467527c1b943 71
Rohit Grover 119:18684018b83e 72 GattCharacteristic *dfuChars[] = {&controlPoint, &packet};
Rohit Grover 118:620d28e7a1ba 73 GattService dfuService(DFUServiceUUID, dfuChars, sizeof(dfuChars) / sizeof(GattCharacteristic *));
Rohit Grover 118:620d28e7a1ba 74
Rohit Grover 118:620d28e7a1ba 75 ble.addService(dfuService);
Rohit Grover 118:620d28e7a1ba 76 handoverCallback = _handoverCallback;
rgrover1 242:0e9201b67e2f 77 serviceAdded = true;
Rohit Grover 118:620d28e7a1ba 78
Rohit Grover 118:620d28e7a1ba 79 ble.onDataWritten(this, &DFUService::onDataWritten);
Rohit Grover 118:620d28e7a1ba 80 }
Rohit Grover 118:620d28e7a1ba 81
mbedAustin 236:a77aefd88e78 82 /**
rgrover1 243:98f930d14515 83 * @brief get the handle for the value attribute of the control characteristic.
mbedAustin 236:a77aefd88e78 84 */
rgrover1 243:98f930d14515 85 uint16_t getControlHandle(void) const {
rgrover1 243:98f930d14515 86 return controlPoint.getValueHandle();
Rohit Grover 118:620d28e7a1ba 87 }
Rohit Grover 118:620d28e7a1ba 88
Rohit Grover 118:620d28e7a1ba 89 /**
rgrover1 242:0e9201b67e2f 90 * @brief This callback allows the DFU service to receive the initial trigger to
Rohit Grover 118:620d28e7a1ba 91 * handover control to the bootloader; but first the application is given a
Rohit Grover 118:620d28e7a1ba 92 * chance to clean up.
mbedAustin 236:a77aefd88e78 93 *
rgrover1 243:98f930d14515 94 * @param[in] params
rgrover1 243:98f930d14515 95 * Information about the characterisitc being updated.
Rohit Grover 118:620d28e7a1ba 96 */
rgrover1 526:caa67c3187a0 97 virtual void onDataWritten(const GattCharacteristicWriteCBParams *params) {
rgrover1 526:caa67c3187a0 98 if (params->charHandle == controlPoint.getValueHandle()) {
Rohit Grover 119:18684018b83e 99 /* At present, writing anything will do the trick--this needs to be improved. */
Rohit Grover 118:620d28e7a1ba 100 if (handoverCallback) {
Rohit Grover 118:620d28e7a1ba 101 handoverCallback();
Rohit Grover 118:620d28e7a1ba 102 }
Rohit Grover 118:620d28e7a1ba 103
Rohit Grover 118:620d28e7a1ba 104 bootloader_start();
Rohit Grover 118:620d28e7a1ba 105 }
Rohit Grover 118:620d28e7a1ba 106 }
Rohit Grover 118:620d28e7a1ba 107
rgrover1 526:caa67c3187a0 108 protected:
Rohit Grover 118:620d28e7a1ba 109 static const unsigned SIZEOF_CONTROL_BYTES = 2;
Rohit Grover 119:18684018b83e 110 static const unsigned SIZEOF_PACKET_BYTES = 20;
Rohit Grover 118:620d28e7a1ba 111
rgrover1 526:caa67c3187a0 112 protected:
Rohit Grover 118:620d28e7a1ba 113 BLEDevice &ble;
Rohit Grover 119:18684018b83e 114
Rohit Grover 119:18684018b83e 115 /**< Writing to the control characteristic triggers the handover to dfu-
Rohit Grover 119:18684018b83e 116 * bootloader. At present, writing anything will do the trick--this needs
Rohit Grover 119:18684018b83e 117 * to be improved. */
rgrover1 277:1407d2f1ce3c 118 WriteOnlyArrayGattCharacteristic<uint8_t, SIZEOF_CONTROL_BYTES> controlPoint;
Rohit Grover 119:18684018b83e 119
Rohit Grover 119:18684018b83e 120 /**< The packet characteristic in this service doesn't do anything meaningful, but
Rohit Grover 119:18684018b83e 121 * is only a placeholder to mimic the corresponding characteristic in the
Rohit Grover 119:18684018b83e 122 * actual DFU service implemented by the bootloader. Without this, some
Rohit Grover 119:18684018b83e 123 * FOTA clients might get confused as service definitions change after
Rohit Grover 119:18684018b83e 124 * handing control over to the bootloader. */
Rohit Grover 119:18684018b83e 125 GattCharacteristic packet;
rgrover1 526:caa67c3187a0 126
rgrover1 526:caa67c3187a0 127 uint8_t controlBytes[SIZEOF_CONTROL_BYTES];
rgrover1 526:caa67c3187a0 128 uint8_t packetBytes[SIZEOF_PACKET_BYTES];
rgrover1 526:caa67c3187a0 129
rgrover1 526:caa67c3187a0 130 static ResetPrepare_t handoverCallback; /**< application specific handover callback. */
Rohit Grover 118:620d28e7a1ba 131 };
Rohit Grover 118:620d28e7a1ba 132
rgrover1 242:0e9201b67e2f 133 #endif /* #ifndef __BLE_DFU_SERVICE_H__*/