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components/nfc/t2t_parser/nfc_tlv_block.h

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