Bill Schilit / BLE_API

Improve readability with getHandle inline

Fork of BLE_API by Bluetooth Low Energy

public/GattAttribute.h@118:620d28e7a1ba, 2014-09-22 (annotated)

Committer:
Rohit Grover
Date:
Mon Sep 22 10:59:09 2014 +0100
Revision:
118:620d28e7a1ba
Parent:
112:64c88ad45610
Child:
137:4b648181ea6b
Release 0.2.0

=============



Highlights:

  Introducing standard services to simplify applications.

  Add support for over-the-air firmware updates.



Features

~~~~~~~~



- This release introduces 'templates' for common services such as heart-rate,

  battery-level, device-info, UART, device-firmware-update etc. These services

  take the shape of class declarations within header files aggregated under a

  new folder called 'services/'. These service-classes provide a high-level

  API hopefully easing the burden of developing BLE applications. The

  underlying APIs to work with characteristics and services are still

  available to allow greater control if needed. We expect to grow the

  supported services to include all SIG defined BLE profiles.



- WriteCallbackParams now includes the characteristic's value-attribute

  handle; this changes the signature of onDataWritten().



- BLEDevice::onDataWritten() now allows chaining of callbacks--this means that

  it is possible to chain together multiple onDataWritten callbacks

  (potentially from different modules of an application) to receive updates to

  characteristics. Many services, such as DFU and UART add their own

  onDataWritten callbacks behind the scenes to trap interesting events. It is

  also possible to chain callbacks to functions within objects.



- Added the following expectation for GattCharacteristic: If valuePtr ==

  NULL, initialLength == 0, and properties == READ for the value attribute of

  a characteristic, then that particular characteristic may be considered

  optional and dropped while instantiating the service with the underlying BLE

  stack.



- Introducing the typedef GattAttribute::Handle_t to capture Attribute handles.



Bugfixes

~~~~~~~~



None.



Compatibility

~~~~~~~~~~~~~



The signature of onDataWritten() has seen a change; so application programs

using this new version of the BLE API will need minor modifications. Please

refer to sample programs under BLE team page.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
carlescufi 112:64c88ad45610 1 /* mbed Microcontroller Library
carlescufi 112:64c88ad45610 2 * Copyright (c) 2006-2013 ARM Limited
carlescufi 112:64c88ad45610 3 *
carlescufi 112:64c88ad45610 4 * Licensed under the Apache License, Version 2.0 (the "License");
carlescufi 112:64c88ad45610 5 * you may not use this file except in compliance with the License.
carlescufi 112:64c88ad45610 6 * You may obtain a copy of the License at
carlescufi 112:64c88ad45610 7 *
carlescufi 112:64c88ad45610 8 * http://www.apache.org/licenses/LICENSE-2.0
carlescufi 112:64c88ad45610 9 *
carlescufi 112:64c88ad45610 10 * Unless required by applicable law or agreed to in writing, software
carlescufi 112:64c88ad45610 11 * distributed under the License is distributed on an "AS IS" BASIS,
carlescufi 112:64c88ad45610 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
carlescufi 112:64c88ad45610 13 * See the License for the specific language governing permissions and
carlescufi 112:64c88ad45610 14 * limitations under the License.
carlescufi 112:64c88ad45610 15 */
carlescufi 112:64c88ad45610 16
carlescufi 112:64c88ad45610 17
carlescufi 112:64c88ad45610 18 #ifndef __GATT_ATTRIBUTE_H__
carlescufi 112:64c88ad45610 19 #define __GATT_ATTRIBUTE_H__
carlescufi 112:64c88ad45610 20
carlescufi 112:64c88ad45610 21 #include "blecommon.h"
carlescufi 112:64c88ad45610 22 #include "UUID.h"
carlescufi 112:64c88ad45610 23
carlescufi 112:64c88ad45610 24 /**************************************************************************/
carlescufi 112:64c88ad45610 25 /*!
carlescufi 112:64c88ad45610 26 \brief GATT attribute
carlescufi 112:64c88ad45610 27 */
carlescufi 112:64c88ad45610 28 /**************************************************************************/
carlescufi 112:64c88ad45610 29 class GattAttribute
carlescufi 112:64c88ad45610 30 {
carlescufi 112:64c88ad45610 31 public:
Rohit Grover 118:620d28e7a1ba 32 typedef uint16_t Handle_t;
carlescufi 112:64c88ad45610 33
Rohit Grover 118:620d28e7a1ba 34 public:
carlescufi 112:64c88ad45610 35 /**
carlescufi 112:64c88ad45610 36 * @brief Creates a new GattAttribute using the specified
carlescufi 112:64c88ad45610 37 * UUID, value length, and inital value
carlescufi 112:64c88ad45610 38 *
carlescufi 112:64c88ad45610 39 * @param[in] uuid
carlescufi 112:64c88ad45610 40 * The UUID to use for this attribute
carlescufi 112:64c88ad45610 41 * @param[in] valuePtr
carlescufi 112:64c88ad45610 42 * The memory holding the initial value.
carlescufi 112:64c88ad45610 43 * @param[in] initialLen
carlescufi 112:64c88ad45610 44 * The min length in bytes of this characteristic's value
carlescufi 112:64c88ad45610 45 * @param[in] maxLen
carlescufi 112:64c88ad45610 46 * The max length in bytes of this characteristic's value
carlescufi 112:64c88ad45610 47 *
carlescufi 112:64c88ad45610 48 * @section EXAMPLE
carlescufi 112:64c88ad45610 49 *
carlescufi 112:64c88ad45610 50 * @code
carlescufi 112:64c88ad45610 51 *
carlescufi 112:64c88ad45610 52 * // UUID = 0x2A19, Min length 2, Max len = 2, Properties = write
carlescufi 112:64c88ad45610 53 * GattCharacteristic c = GattCharacteristic( 0x2A19, 2, 2, BLE_GATT_CHAR_PROPERTIES_WRITE );
carlescufi 112:64c88ad45610 54 *
carlescufi 112:64c88ad45610 55 * @endcode
carlescufi 112:64c88ad45610 56 */
carlescufi 112:64c88ad45610 57 /**************************************************************************/
carlescufi 112:64c88ad45610 58 GattAttribute(const UUID &uuid, uint8_t *valuePtr = NULL, uint16_t initialLen = 0, uint16_t maxLen = 0) :
carlescufi 112:64c88ad45610 59 _uuid(uuid), _valuePtr(valuePtr), _initialLen(initialLen), _lenMax(maxLen), _handle(){
carlescufi 112:64c88ad45610 60 /* empty */
carlescufi 112:64c88ad45610 61 }
carlescufi 112:64c88ad45610 62
carlescufi 112:64c88ad45610 63 public:
Rohit Grover 118:620d28e7a1ba 64 Handle_t getHandle(void) const {
carlescufi 112:64c88ad45610 65 return _handle;
carlescufi 112:64c88ad45610 66 }
Rohit Grover 118:620d28e7a1ba 67
Rohit Grover 118:620d28e7a1ba 68 void setHandle(Handle_t id) {
carlescufi 112:64c88ad45610 69 _handle = id;
carlescufi 112:64c88ad45610 70 }
Rohit Grover 118:620d28e7a1ba 71
carlescufi 112:64c88ad45610 72 const UUID &getUUID(void) const {
carlescufi 112:64c88ad45610 73 return _uuid;
carlescufi 112:64c88ad45610 74 }
Rohit Grover 118:620d28e7a1ba 75
carlescufi 112:64c88ad45610 76 uint16_t getInitialLength(void) const {
carlescufi 112:64c88ad45610 77 return _initialLen;
carlescufi 112:64c88ad45610 78 }
Rohit Grover 118:620d28e7a1ba 79
carlescufi 112:64c88ad45610 80 uint16_t getMaxLength(void) const {
carlescufi 112:64c88ad45610 81 return _lenMax;
carlescufi 112:64c88ad45610 82 }
Rohit Grover 118:620d28e7a1ba 83
carlescufi 112:64c88ad45610 84 uint8_t *getValuePtr(void) {
carlescufi 112:64c88ad45610 85 return _valuePtr;
carlescufi 112:64c88ad45610 86 }
carlescufi 112:64c88ad45610 87
carlescufi 112:64c88ad45610 88 protected:
carlescufi 112:64c88ad45610 89 UUID _uuid; /* Characteristic UUID */
carlescufi 112:64c88ad45610 90 uint8_t *_valuePtr;
carlescufi 112:64c88ad45610 91 uint16_t _initialLen; /* Initial length of the value */
carlescufi 112:64c88ad45610 92 uint16_t _lenMax; /* Maximum length of the value */
Rohit Grover 118:620d28e7a1ba 93 Handle_t _handle;
carlescufi 112:64c88ad45610 94 };
carlescufi 112:64c88ad45610 95
carlescufi 112:64c88ad45610 96 #endif // ifndef __GATT_ATTRIBUTE_H__