103 lines
3.7 KiB
C
103 lines
3.7 KiB
C
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/**
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* Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NFC_TLV_BLOCK_H__
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#define NFC_TLV_BLOCK_H__
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**@file
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*
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* @defgroup nfc_type_2_tag_tlv_block Type 2 Tag TLV blocks
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* @{
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* @ingroup nfc_type_2_tag_parser
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*
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* @brief Descriptor for a Type 2 Tag TLV block.
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*
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*/
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/**
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* @brief Tag field values.
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*
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* Possible values for the tag field in a TLV block.
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*/
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typedef enum
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{
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TLV_NULL = 0x00, ///< Might be used for padding of memory areas.
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TLV_LOCK_CONTROL = 0x01, ///< Defines details of the lock bits.
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TLV_MEMORY_CONTROL = 0x02, ///< Identifies reserved memory areas.
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TLV_NDEF_MESSAGE = 0x03, ///< Contains an NDEF message.
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TLV_PROPRIETARY = 0xFD, ///< Tag proprietary information.
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TLV_TERMINATOR = 0xFE ///< Last TLV block in the data area.
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} tlv_block_types_t;
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/**
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* @brief TLV block descriptor.
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*/
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typedef struct
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{
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uint8_t tag; ///< Type of the TLV block.
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uint16_t length; ///< Length of the value field.
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uint8_t * p_value; ///< Pointer to the value field (NULL if no value field is present in the block).
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} tlv_block_t;
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#define TLV_T_LENGTH 1 ///< Length of a tag field.
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#define TLV_L_SHORT_LENGTH 1 ///< Length of a short length field.
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#define TLV_L_LONG_LENGTH 3 ///< Length of an extended length field.
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#define TLV_L_FORMAT_FLAG 0xFF ///< Value indicating the use of an extended length field.
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#define TLV_NULL_TERMINATOR_LEN 0 ///< Predefined length of the NULL and TERMINATOR TLV blocks.
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#define TLV_LOCK_MEMORY_CTRL_LEN 3 ///< Predefined length of the LOCK CONTROL and MEMORY CONTROL blocks.
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* NFC_TLV_BLOCK_H__ */
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