Lancaster University / BLE_API

Lancaster University's fork of the mbed BLE API. Lives on github, https://github.com/lancaster-university/BLE_API

Dependents:   microbit-dal microbit-dal microbit-ble-open microbit-dal ... more

Fork of BLE_API by Bluetooth Low Energy

ble/UUID.h@1131:73c11a85c6d6, 2016-04-06 (annotated)

Committer:
LancasterUniversity
Date:
Wed Apr 06 18:40:26 2016 +0100
Revision:
1131:73c11a85c6d6
Parent:
1056:ce2fb3d09929
Child:
1134:faa0160c87ff
Synchronized with git rev 13bf70b6

Author: Rohit Grover

Release 2.1.5

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



A minor release to separate the concept of minlen and len in

GattCharacteristic. Also contains some improvements to documentation.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 710:b2e1a2660ec2 1 /* mbed Microcontroller Library
rgrover1 710:b2e1a2660ec2 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 710:b2e1a2660ec2 3 *
rgrover1 710:b2e1a2660ec2 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 710:b2e1a2660ec2 5 * you may not use this file except in compliance with the License.
rgrover1 710:b2e1a2660ec2 6 * You may obtain a copy of the License at
rgrover1 710:b2e1a2660ec2 7 *
rgrover1 710:b2e1a2660ec2 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 710:b2e1a2660ec2 9 *
rgrover1 710:b2e1a2660ec2 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 710:b2e1a2660ec2 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 710:b2e1a2660ec2 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 710:b2e1a2660ec2 13 * See the License for the specific language governing permissions and
rgrover1 710:b2e1a2660ec2 14 * limitations under the License.
rgrover1 710:b2e1a2660ec2 15 */
rgrover1 710:b2e1a2660ec2 16
rgrover1 710:b2e1a2660ec2 17 #ifndef __UUID_H__
rgrover1 710:b2e1a2660ec2 18 #define __UUID_H__
rgrover1 710:b2e1a2660ec2 19
rgrover1 710:b2e1a2660ec2 20 #include <stdint.h>
rgrover1 710:b2e1a2660ec2 21 #include <string.h>
rgrover1 710:b2e1a2660ec2 22
rgrover1 710:b2e1a2660ec2 23 #include "blecommon.h"
rgrover1 710:b2e1a2660ec2 24
rgrover1 710:b2e1a2660ec2 25 class UUID {
rgrover1 710:b2e1a2660ec2 26 public:
rgrover1 710:b2e1a2660ec2 27 enum UUID_Type_t {
vcoubard 1048:efb29faf12fc 28 UUID_TYPE_SHORT = 0, // Short BLE UUID.
vcoubard 1048:efb29faf12fc 29 UUID_TYPE_LONG = 1 // Full 128-bit UUID.
rgrover1 710:b2e1a2660ec2 30 };
rgrover1 710:b2e1a2660ec2 31
rgrover1 710:b2e1a2660ec2 32 typedef uint16_t ShortUUIDBytes_t;
rgrover1 710:b2e1a2660ec2 33
rgrover1 710:b2e1a2660ec2 34 static const unsigned LENGTH_OF_LONG_UUID = 16;
rgrover1 710:b2e1a2660ec2 35 typedef uint8_t LongUUIDBytes_t[LENGTH_OF_LONG_UUID];
rgrover1 710:b2e1a2660ec2 36
rgrover1 710:b2e1a2660ec2 37 public:
rgrover1 1035:d8ba3cb5a39a 38 /**
vcoubard 1048:efb29faf12fc 39 * Creates a new 128-bit UUID.
rgrover1 710:b2e1a2660ec2 40 *
rgrover1 710:b2e1a2660ec2 41 * @note The UUID is a unique 128-bit (16 byte) ID used to identify
rgrover1 710:b2e1a2660ec2 42 * different service or characteristics on the BLE device.
rgrover1 710:b2e1a2660ec2 43 *
rgrover1 710:b2e1a2660ec2 44 * @param longUUID
LancasterUniversity 1131:73c11a85c6d6 45 * The 128-bit (16-byte) UUID value, MSB first (big-endian).
rgrover1 710:b2e1a2660ec2 46 */
LancasterUniversity 1131:73c11a85c6d6 47 UUID(const LongUUIDBytes_t longUUID) : type(UUID_TYPE_LONG), baseUUID(), shortUUID(0) {
LancasterUniversity 1131:73c11a85c6d6 48 setupLong(longUUID);
rgrover1 710:b2e1a2660ec2 49 }
rgrover1 710:b2e1a2660ec2 50
rgrover1 710:b2e1a2660ec2 51 /**
vcoubard 1048:efb29faf12fc 52 * Creates a new 16-bit UUID.
rgrover1 710:b2e1a2660ec2 53 *
rgrover1 710:b2e1a2660ec2 54 * @note The UUID is a unique 16-bit (2 byte) ID used to identify
rgrover1 710:b2e1a2660ec2 55 * different service or characteristics on the BLE device.
rgrover1 710:b2e1a2660ec2 56 *
rgrover1 710:b2e1a2660ec2 57 * For efficiency, and because 16 bytes would take a large chunk of the
rgrover1 710:b2e1a2660ec2 58 * 27-byte data payload length of the Link Layer, the BLE specification adds
rgrover1 710:b2e1a2660ec2 59 * two additional UUID formats: 16-bit and 32-bit UUIDs. These shortened
rgrover1 710:b2e1a2660ec2 60 * formats can be used only with UUIDs that are defined in the Bluetooth
vcoubard 1048:efb29faf12fc 61 * specification (listed by the Bluetooth SIG as standard
rgrover1 710:b2e1a2660ec2 62 * Bluetooth UUIDs).
rgrover1 710:b2e1a2660ec2 63 *
rgrover1 710:b2e1a2660ec2 64 * To reconstruct the full 128-bit UUID from the shortened version, insert
rgrover1 710:b2e1a2660ec2 65 * the 16-bit short value (indicated by xxxx, including leading zeros) into
rgrover1 710:b2e1a2660ec2 66 * the Bluetooth Base UUID:
rgrover1 710:b2e1a2660ec2 67 *
rgrover1 710:b2e1a2660ec2 68 * 0000xxxx-0000-1000-8000-00805F9B34FB
rgrover1 710:b2e1a2660ec2 69 *
rgrover1 710:b2e1a2660ec2 70 * @note Shortening is not available for UUIDs that are not derived from the
rgrover1 710:b2e1a2660ec2 71 * Bluetooth Base UUID. Such non-standard UUIDs are commonly called
LancasterUniversity 1131:73c11a85c6d6 72 * vendor-specific UUIDs. In these cases, you'll need to use the full
rgrover1 710:b2e1a2660ec2 73 * 128-bit UUID value at all times.
rgrover1 710:b2e1a2660ec2 74 *
vcoubard 1048:efb29faf12fc 75 * @note We don't yet support 32-bit shortened UUIDs.
rgrover1 710:b2e1a2660ec2 76 */
rgrover1 911:885ee648c6ab 77 UUID(ShortUUIDBytes_t _shortUUID) : type(UUID_TYPE_SHORT), baseUUID(), shortUUID(_shortUUID) {
vcoubard 1048:efb29faf12fc 78 /* Empty */
rgrover1 710:b2e1a2660ec2 79 }
rgrover1 710:b2e1a2660ec2 80
rgrover1 710:b2e1a2660ec2 81 UUID(const UUID &source) {
rgrover1 710:b2e1a2660ec2 82 type = source.type;
rgrover1 710:b2e1a2660ec2 83 shortUUID = source.shortUUID;
rgrover1 710:b2e1a2660ec2 84 memcpy(baseUUID, source.baseUUID, LENGTH_OF_LONG_UUID);
rgrover1 710:b2e1a2660ec2 85 }
rgrover1 710:b2e1a2660ec2 86
rgrover1 710:b2e1a2660ec2 87 UUID(void) : type(UUID_TYPE_SHORT), shortUUID(BLE_UUID_UNKNOWN) {
rgrover1 710:b2e1a2660ec2 88 /* empty */
rgrover1 710:b2e1a2660ec2 89 }
rgrover1 710:b2e1a2660ec2 90
rgrover1 710:b2e1a2660ec2 91 /**
vcoubard 1048:efb29faf12fc 92 * Fill in a 128-bit UUID; this is useful when the UUID isn't known at the time of the object construction.
rgrover1 710:b2e1a2660ec2 93 */
LancasterUniversity 1131:73c11a85c6d6 94 void setupLong(const LongUUIDBytes_t longUUID) {
rgrover1 710:b2e1a2660ec2 95 type = UUID_TYPE_LONG;
LancasterUniversity 1131:73c11a85c6d6 96 memcpy(baseUUID, longUUID, LENGTH_OF_LONG_UUID);
LancasterUniversity 1131:73c11a85c6d6 97 shortUUID = (uint16_t)((longUUID[2] << 8) | (longUUID[3]));
rgrover1 710:b2e1a2660ec2 98 }
rgrover1 710:b2e1a2660ec2 99
rgrover1 710:b2e1a2660ec2 100 public:
rgrover1 710:b2e1a2660ec2 101 UUID_Type_t shortOrLong(void) const {return type; }
rgrover1 710:b2e1a2660ec2 102 const uint8_t *getBaseUUID(void) const {
rgrover1 710:b2e1a2660ec2 103 if (type == UUID_TYPE_SHORT) {
rgrover1 710:b2e1a2660ec2 104 return (const uint8_t*)&shortUUID;
rgrover1 710:b2e1a2660ec2 105 } else {
rgrover1 710:b2e1a2660ec2 106 return baseUUID;
rgrover1 710:b2e1a2660ec2 107 }
rgrover1 710:b2e1a2660ec2 108 }
rgrover1 710:b2e1a2660ec2 109
rgrover1 710:b2e1a2660ec2 110 ShortUUIDBytes_t getShortUUID(void) const {return shortUUID;}
rgrover1 710:b2e1a2660ec2 111 uint8_t getLen(void) const {
rgrover1 710:b2e1a2660ec2 112 return ((type == UUID_TYPE_SHORT) ? sizeof(ShortUUIDBytes_t) : LENGTH_OF_LONG_UUID);
rgrover1 710:b2e1a2660ec2 113 }
rgrover1 710:b2e1a2660ec2 114
rgrover1 710:b2e1a2660ec2 115 bool operator== (const UUID &other) const {
rgrover1 710:b2e1a2660ec2 116 if ((this->type == UUID_TYPE_SHORT) && (other.type == UUID_TYPE_SHORT) &&
rgrover1 710:b2e1a2660ec2 117 (this->shortUUID == other.shortUUID)) {
rgrover1 710:b2e1a2660ec2 118 return true;
rgrover1 710:b2e1a2660ec2 119 }
rgrover1 710:b2e1a2660ec2 120
rgrover1 710:b2e1a2660ec2 121 if ((this->type == UUID_TYPE_LONG) && (other.type == UUID_TYPE_LONG) &&
rgrover1 710:b2e1a2660ec2 122 (memcmp(this->baseUUID, other.baseUUID, LENGTH_OF_LONG_UUID) == 0)) {
rgrover1 710:b2e1a2660ec2 123 return true;
rgrover1 710:b2e1a2660ec2 124 }
rgrover1 710:b2e1a2660ec2 125
rgrover1 710:b2e1a2660ec2 126 return false;
rgrover1 710:b2e1a2660ec2 127 }
rgrover1 710:b2e1a2660ec2 128
rgrover1 710:b2e1a2660ec2 129 bool operator!= (const UUID &other) const {
rgrover1 710:b2e1a2660ec2 130 return !(*this == other);
rgrover1 710:b2e1a2660ec2 131 }
rgrover1 710:b2e1a2660ec2 132
rgrover1 710:b2e1a2660ec2 133 private:
rgrover1 710:b2e1a2660ec2 134 UUID_Type_t type; // UUID_TYPE_SHORT or UUID_TYPE_LONG
LancasterUniversity 1131:73c11a85c6d6 135 LongUUIDBytes_t baseUUID; /* The base of the long UUID (if
LancasterUniversity 1131:73c11a85c6d6 136 * used). Note: bytes 12 and 13 (counting from LSB)
LancasterUniversity 1131:73c11a85c6d6 137 * are zeroed out to allow comparison with other long
LancasterUniversity 1131:73c11a85c6d6 138 * UUIDs, which differ only in the 16-bit relative
LancasterUniversity 1131:73c11a85c6d6 139 * part.*/
LancasterUniversity 1131:73c11a85c6d6 140 ShortUUIDBytes_t shortUUID; // 16 bit UUID (byte 2-3 using with base).
rgrover1 710:b2e1a2660ec2 141 };
rgrover1 710:b2e1a2660ec2 142
rgrover1 710:b2e1a2660ec2 143 #endif // ifndef __UUID_H__