Andrea Sortino / BLE_API

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Fork of BLE_API by Bluetooth Low Energy

ble/GattAttribute.h@1209:b8e423d6b91b, 2017-09-28 (annotated)

Committer:
andreasortino
Date:
Thu Sep 28 13:22:57 2017 +0000
Revision:
1209:b8e423d6b91b
Parent:
1183:1589830dbdb7 
ertrfgnbc

Who changed what in which revision?

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vcoubard 1131:692ddf04fc42 1 /* mbed Microcontroller Library
vcoubard 1131:692ddf04fc42 2 * Copyright (c) 2006-2013 ARM Limited
vcoubard 1131:692ddf04fc42 3 *
vcoubard 1131:692ddf04fc42 4 * Licensed under the Apache License, Version 2.0 (the "License");
vcoubard 1131:692ddf04fc42 5 * you may not use this file except in compliance with the License.
vcoubard 1131:692ddf04fc42 6 * You may obtain a copy of the License at
vcoubard 1131:692ddf04fc42 7 *
vcoubard 1131:692ddf04fc42 8 * http://www.apache.org/licenses/LICENSE-2.0
vcoubard 1131:692ddf04fc42 9 *
vcoubard 1131:692ddf04fc42 10 * Unless required by applicable law or agreed to in writing, software
vcoubard 1131:692ddf04fc42 11 * distributed under the License is distributed on an "AS IS" BASIS,
vcoubard 1131:692ddf04fc42 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vcoubard 1131:692ddf04fc42 13 * See the License for the specific language governing permissions and
vcoubard 1131:692ddf04fc42 14 * limitations under the License.
vcoubard 1131:692ddf04fc42 15 */
vcoubard 1131:692ddf04fc42 16
vcoubard 1131:692ddf04fc42 17 #ifndef __GATT_ATTRIBUTE_H__
vcoubard 1131:692ddf04fc42 18 #define __GATT_ATTRIBUTE_H__
vcoubard 1131:692ddf04fc42 19
vcoubard 1131:692ddf04fc42 20 #include "UUID.h"
vcoubard 1131:692ddf04fc42 21
vcoubard 1183:1589830dbdb7 22 /**
vcoubard 1183:1589830dbdb7 23 * Instances of this class encapsulate the data that belongs to a Bluetooth Low
vcoubard 1183:1589830dbdb7 24 * Energy attribute.
vcoubard 1183:1589830dbdb7 25 */
vcoubard 1131:692ddf04fc42 26 class GattAttribute {
vcoubard 1131:692ddf04fc42 27 public:
vcoubard 1183:1589830dbdb7 28 /**
vcoubard 1183:1589830dbdb7 29 * Type for the handle or ID of the attribute in the ATT table. These are
vcoubard 1183:1589830dbdb7 30 * unique and are usually generated by the underlying BLE stack.
vcoubard 1183:1589830dbdb7 31 */
vcoubard 1131:692ddf04fc42 32 typedef uint16_t Handle_t;
vcoubard 1183:1589830dbdb7 33 /**
vcoubard 1183:1589830dbdb7 34 * Define the value of an invalid attribute handle.
vcoubard 1183:1589830dbdb7 35 */
vcoubard 1131:692ddf04fc42 36 static const Handle_t INVALID_HANDLE = 0x0000;
vcoubard 1131:692ddf04fc42 37
vcoubard 1131:692ddf04fc42 38 public:
vcoubard 1131:692ddf04fc42 39 /**
vcoubard 1131:692ddf04fc42 40 * @brief Creates a new GattAttribute using the specified
vcoubard 1131:692ddf04fc42 41 * UUID, value length, and inital value.
vcoubard 1131:692ddf04fc42 42 *
vcoubard 1131:692ddf04fc42 43 * @param[in] uuid
vcoubard 1131:692ddf04fc42 44 * The UUID to use for this attribute.
vcoubard 1131:692ddf04fc42 45 * @param[in] valuePtr
vcoubard 1131:692ddf04fc42 46 * The memory holding the initial value.
vcoubard 1131:692ddf04fc42 47 * @param[in] len
vcoubard 1131:692ddf04fc42 48 * The length in bytes of this attribute's value.
vcoubard 1131:692ddf04fc42 49 * @param[in] maxLen
vcoubard 1131:692ddf04fc42 50 * The max length in bytes of this attribute's value.
vcoubard 1132:6362b7c2fdff 51 * @param[in] hasVariableLen
vcoubard 1132:6362b7c2fdff 52 * Whether the attribute's value length changes overtime.
vcoubard 1131:692ddf04fc42 53 *
vcoubard 1131:692ddf04fc42 54 * @section EXAMPLE
vcoubard 1131:692ddf04fc42 55 *
vcoubard 1131:692ddf04fc42 56 * @code
vcoubard 1131:692ddf04fc42 57 *
vcoubard 1131:692ddf04fc42 58 * // UUID = 0x2A19, Min length 2, Max len = 2
vcoubard 1131:692ddf04fc42 59 * GattAttribute attr = GattAttribute(0x2A19, &someValue, 2, 2);
vcoubard 1131:692ddf04fc42 60 *
vcoubard 1131:692ddf04fc42 61 * @endcode
vcoubard 1131:692ddf04fc42 62 */
vcoubard 1132:6362b7c2fdff 63 GattAttribute(const UUID &uuid, uint8_t *valuePtr = NULL, uint16_t len = 0, uint16_t maxLen = 0, bool hasVariableLen = true) :
vcoubard 1132:6362b7c2fdff 64 _uuid(uuid), _valuePtr(valuePtr), _lenMax(maxLen), _len(len), _hasVariableLen(hasVariableLen), _handle() {
vcoubard 1131:692ddf04fc42 65 /* Empty */
vcoubard 1131:692ddf04fc42 66 }
vcoubard 1131:692ddf04fc42 67
vcoubard 1131:692ddf04fc42 68 public:
vcoubard 1183:1589830dbdb7 69 /**
vcoubard 1183:1589830dbdb7 70 * Get the attribute's handle in the ATT table.
vcoubard 1183:1589830dbdb7 71 *
vcoubard 1183:1589830dbdb7 72 * @return The attribute's handle.
vcoubard 1183:1589830dbdb7 73 */
vcoubard 1183:1589830dbdb7 74 Handle_t getHandle(void) const {
vcoubard 1183:1589830dbdb7 75 return _handle;
vcoubard 1183:1589830dbdb7 76 }
vcoubard 1183:1589830dbdb7 77
vcoubard 1183:1589830dbdb7 78 /**
vcoubard 1183:1589830dbdb7 79 * The UUID of the characteristic that this attribute belongs to.
vcoubard 1183:1589830dbdb7 80 *
vcoubard 1183:1589830dbdb7 81 * @return The characteristic's UUID.
vcoubard 1183:1589830dbdb7 82 */
vcoubard 1183:1589830dbdb7 83 const UUID &getUUID(void) const {
vcoubard 1183:1589830dbdb7 84 return _uuid;
vcoubard 1183:1589830dbdb7 85 }
vcoubard 1183:1589830dbdb7 86
vcoubard 1183:1589830dbdb7 87 /**
vcoubard 1183:1589830dbdb7 88 * Get the current length of the attribute value.
vcoubard 1183:1589830dbdb7 89 *
vcoubard 1183:1589830dbdb7 90 * @return The current length of the attribute value.
vcoubard 1183:1589830dbdb7 91 */
vcoubard 1183:1589830dbdb7 92 uint16_t getLength(void) const {
vcoubard 1183:1589830dbdb7 93 return _len;
vcoubard 1183:1589830dbdb7 94 }
vcoubard 1183:1589830dbdb7 95
vcoubard 1183:1589830dbdb7 96 /**
vcoubard 1183:1589830dbdb7 97 * Get the maximum length of the attribute value.
vcoubard 1183:1589830dbdb7 98 *
vcoubard 1183:1589830dbdb7 99 * The maximum length of the attribute value.
vcoubard 1183:1589830dbdb7 100 */
vcoubard 1183:1589830dbdb7 101 uint16_t getMaxLength(void) const {
vcoubard 1183:1589830dbdb7 102 return _lenMax;
vcoubard 1183:1589830dbdb7 103 }
vcoubard 1183:1589830dbdb7 104
vcoubard 1183:1589830dbdb7 105 /**
vcoubard 1183:1589830dbdb7 106 * Get a pointer to the current length of the attribute value.
vcoubard 1183:1589830dbdb7 107 *
vcoubard 1183:1589830dbdb7 108 * @return A pointer to the current length of the attribute value.
vcoubard 1183:1589830dbdb7 109 */
vcoubard 1183:1589830dbdb7 110 uint16_t *getLengthPtr(void) {
vcoubard 1183:1589830dbdb7 111 return &_len;
vcoubard 1183:1589830dbdb7 112 }
vcoubard 1183:1589830dbdb7 113
vcoubard 1183:1589830dbdb7 114 /**
vcoubard 1183:1589830dbdb7 115 * Set the attribute handle.
vcoubard 1183:1589830dbdb7 116 *
vcoubard 1183:1589830dbdb7 117 * @param[in] id
vcoubard 1183:1589830dbdb7 118 * The new attribute handle.
vcoubard 1183:1589830dbdb7 119 */
vcoubard 1183:1589830dbdb7 120 void setHandle(Handle_t id) {
vcoubard 1183:1589830dbdb7 121 _handle = id;
vcoubard 1183:1589830dbdb7 122 }
vcoubard 1183:1589830dbdb7 123
vcoubard 1183:1589830dbdb7 124 /**
vcoubard 1183:1589830dbdb7 125 * Get a pointer to the attribute value.
vcoubard 1183:1589830dbdb7 126 *
vcoubard 1183:1589830dbdb7 127 * @return A pointer to the attribute value.
vcoubard 1183:1589830dbdb7 128 */
vcoubard 1183:1589830dbdb7 129 uint8_t *getValuePtr(void) {
vcoubard 1183:1589830dbdb7 130 return _valuePtr;
vcoubard 1183:1589830dbdb7 131 }
vcoubard 1183:1589830dbdb7 132
vcoubard 1183:1589830dbdb7 133 /**
vcoubard 1183:1589830dbdb7 134 * Check whether the length of the attribute's value can change over time.
vcoubard 1183:1589830dbdb7 135 *
vcoubard 1183:1589830dbdb7 136 * @return true if the attribute has variable length, false otherwise.
vcoubard 1183:1589830dbdb7 137 */
vcoubard 1183:1589830dbdb7 138 bool hasVariableLength(void) const {
vcoubard 1183:1589830dbdb7 139 return _hasVariableLen;
vcoubard 1183:1589830dbdb7 140 }
vcoubard 1131:692ddf04fc42 141
vcoubard 1131:692ddf04fc42 142 private:
vcoubard 1183:1589830dbdb7 143 /**
vcoubard 1183:1589830dbdb7 144 * Characteristic's UUID.
vcoubard 1183:1589830dbdb7 145 */
vcoubard 1183:1589830dbdb7 146 UUID _uuid;
vcoubard 1183:1589830dbdb7 147 /**
vcoubard 1183:1589830dbdb7 148 * Pointer to the attribute's value.
vcoubard 1183:1589830dbdb7 149 */
vcoubard 1131:692ddf04fc42 150 uint8_t *_valuePtr;
vcoubard 1183:1589830dbdb7 151 /**
vcoubard 1183:1589830dbdb7 152 * Maximum length of the value pointed to by GattAttribute::_valuePtr.
vcoubard 1183:1589830dbdb7 153 */
vcoubard 1183:1589830dbdb7 154 uint16_t _lenMax;
vcoubard 1183:1589830dbdb7 155 /**
vcoubard 1183:1589830dbdb7 156 * Current length of the value pointed to by GattAttribute::_valuePtr.
vcoubard 1183:1589830dbdb7 157 */
vcoubard 1183:1589830dbdb7 158 uint16_t _len;
vcoubard 1183:1589830dbdb7 159 /**
vcoubard 1183:1589830dbdb7 160 * Whether the length of the value can change over time.
vcoubard 1183:1589830dbdb7 161 */
vcoubard 1132:6362b7c2fdff 162 bool _hasVariableLen;
vcoubard 1183:1589830dbdb7 163 /**
vcoubard 1183:1589830dbdb7 164 * The attribute's handle in the ATT table.
vcoubard 1183:1589830dbdb7 165 */
vcoubard 1131:692ddf04fc42 166 Handle_t _handle;
vcoubard 1131:692ddf04fc42 167
vcoubard 1131:692ddf04fc42 168 private:
vcoubard 1131:692ddf04fc42 169 /* Disallow copy and assignment. */
vcoubard 1131:692ddf04fc42 170 GattAttribute(const GattAttribute &);
vcoubard 1131:692ddf04fc42 171 GattAttribute& operator=(const GattAttribute &);
vcoubard 1131:692ddf04fc42 172 };
vcoubard 1131:692ddf04fc42 173
vcoubard 1183:1589830dbdb7 174 #endif /* ifndef __GATT_ATTRIBUTE_H__ */