Updated
Fork of BLE_API by
ble/UUID.h
- Committer:
- rgrover1
- Date:
- 2015-11-02
- Revision:
- 844:96aedb87cdd4
- Parent:
- 710:b2e1a2660ec2
- Child:
- 850:32ff6e392630
File content as of revision 844:96aedb87cdd4:
/* 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 __UUID_H__ #define __UUID_H__ #include <stdint.h> #include <string.h> #include "blecommon.h" class UUID { public: enum UUID_Type_t { UUID_TYPE_SHORT = 0, // Short BLE UUID UUID_TYPE_LONG = 1 // Full 128-bit UUID }; typedef uint16_t ShortUUIDBytes_t; static const unsigned LENGTH_OF_LONG_UUID = 16; typedef uint8_t LongUUIDBytes_t[LENGTH_OF_LONG_UUID]; public: /** * Creates a new 128-bit UUID * * @note The UUID is a unique 128-bit (16 byte) ID used to identify * different service or characteristics on the BLE device. * * @param longUUID * The 128-bit (16-byte) UUID value, MSB first (big-endian). */ UUID(const LongUUIDBytes_t longUUID) : type(UUID_TYPE_LONG), baseUUID(), shortUUID(0) { setupLong(longUUID); } /** * Creates a new 16-bit UUID * * @note The UUID is a unique 16-bit (2 byte) ID used to identify * different service or characteristics on the BLE device. * * For efficiency, and because 16 bytes would take a large chunk of the * 27-byte data payload length of the Link Layer, the BLE specification adds * two additional UUID formats: 16-bit and 32-bit UUIDs. These shortened * formats can be used only with UUIDs that are defined in the Bluetooth * specification (i.e., that are listed by the Bluetooth SIG as standard * Bluetooth UUIDs). * * To reconstruct the full 128-bit UUID from the shortened version, insert * the 16-bit short value (indicated by xxxx, including leading zeros) into * the Bluetooth Base UUID: * * 0000xxxx-0000-1000-8000-00805F9B34FB * * @note Shortening is not available for UUIDs that are not derived from the * Bluetooth Base UUID. Such non-standard UUIDs are commonly called * vendor-specific UUIDs. In these cases, you’ll need to use the full * 128-bit UUID value at all times. * * @note we don't yet support 32-bit shortened UUIDs. */ UUID(ShortUUIDBytes_t _shortUUID) : type(UUID_TYPE_SHORT), baseUUID(), shortUUID(_shortUUID) { /* empty */ } UUID(const UUID &source) { type = source.type; shortUUID = source.shortUUID; memcpy(baseUUID, source.baseUUID, LENGTH_OF_LONG_UUID); } UUID(void) : type(UUID_TYPE_SHORT), shortUUID(BLE_UUID_UNKNOWN) { /* empty */ } /** * Fill in a 128-bit UUID; this is useful when UUID isn't known at the time of object construction. */ void setupLong(const LongUUIDBytes_t longUUID) { type = UUID_TYPE_LONG; memcpy(baseUUID, longUUID, LENGTH_OF_LONG_UUID); shortUUID = (uint16_t)((longUUID[2] << 8) | (longUUID[3])); } public: UUID_Type_t shortOrLong(void) const {return type; } const uint8_t *getBaseUUID(void) const { if (type == UUID_TYPE_SHORT) { return (const uint8_t*)&shortUUID; } else { return baseUUID; } } ShortUUIDBytes_t getShortUUID(void) const {return shortUUID;} uint8_t getLen(void) const { return ((type == UUID_TYPE_SHORT) ? sizeof(ShortUUIDBytes_t) : LENGTH_OF_LONG_UUID); } bool operator== (const UUID &other) const { if ((this->type == UUID_TYPE_SHORT) && (other.type == UUID_TYPE_SHORT) && (this->shortUUID == other.shortUUID)) { return true; } if ((this->type == UUID_TYPE_LONG) && (other.type == UUID_TYPE_LONG) && (memcmp(this->baseUUID, other.baseUUID, LENGTH_OF_LONG_UUID) == 0)) { return true; } return false; } bool operator!= (const UUID &other) const { return !(*this == other); } private: UUID_Type_t type; // UUID_TYPE_SHORT or UUID_TYPE_LONG LongUUIDBytes_t baseUUID; /* the base of the long UUID (if * used). Note: bytes 12 and 13 (counting from LSB) * are zeroed out to allow comparison with other long * UUIDs which differ only in the 16-bit relative * part.*/ ShortUUIDBytes_t shortUUID; // 16 bit uuid (byte 2-3 using with base) }; #endif // ifndef __UUID_H__