Nordic stack and drivers for the mbed BLE API
Dependents: Sensen-classic-v8-IAQ_copy_4
Fork of nRF51822 by
TARGET_MCU_NRF51822/sdk/source/libraries/fds/fds.h@639:7f459d371b75, 2017-11-10 (annotated)
- Committer:
- amithy
- Date:
- Fri Nov 10 20:27:44 2017 +0000
- Revision:
- 639:7f459d371b75
- Parent:
- 638:c90ae1400bf2
t
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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Vincent Coubard |
638:c90ae1400bf2 | 1 | /* |
Vincent Coubard |
638:c90ae1400bf2 | 2 | * Copyright (c) Nordic Semiconductor ASA |
Vincent Coubard |
638:c90ae1400bf2 | 3 | * All rights reserved. |
Vincent Coubard |
638:c90ae1400bf2 | 4 | * |
Vincent Coubard |
638:c90ae1400bf2 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
Vincent Coubard |
638:c90ae1400bf2 | 6 | * are permitted provided that the following conditions are met: |
Vincent Coubard |
638:c90ae1400bf2 | 7 | * |
Vincent Coubard |
638:c90ae1400bf2 | 8 | * 1. Redistributions of source code must retain the above copyright notice, this |
Vincent Coubard |
638:c90ae1400bf2 | 9 | * list of conditions and the following disclaimer. |
Vincent Coubard |
638:c90ae1400bf2 | 10 | * |
Vincent Coubard |
638:c90ae1400bf2 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, this |
Vincent Coubard |
638:c90ae1400bf2 | 12 | * list of conditions and the following disclaimer in the documentation and/or |
Vincent Coubard |
638:c90ae1400bf2 | 13 | * other materials provided with the distribution. |
Vincent Coubard |
638:c90ae1400bf2 | 14 | * |
Vincent Coubard |
638:c90ae1400bf2 | 15 | * 3. Neither the name of Nordic Semiconductor ASA nor the names of other |
Vincent Coubard |
638:c90ae1400bf2 | 16 | * contributors to this software may be used to endorse or promote products |
Vincent Coubard |
638:c90ae1400bf2 | 17 | * derived from this software without specific prior written permission. |
Vincent Coubard |
638:c90ae1400bf2 | 18 | * |
Vincent Coubard |
638:c90ae1400bf2 | 19 | * |
Vincent Coubard |
638:c90ae1400bf2 | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
Vincent Coubard |
638:c90ae1400bf2 | 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
Vincent Coubard |
638:c90ae1400bf2 | 22 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
Vincent Coubard |
638:c90ae1400bf2 | 23 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
Vincent Coubard |
638:c90ae1400bf2 | 24 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
Vincent Coubard |
638:c90ae1400bf2 | 25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
Vincent Coubard |
638:c90ae1400bf2 | 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
Vincent Coubard |
638:c90ae1400bf2 | 27 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
Vincent Coubard |
638:c90ae1400bf2 | 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
Vincent Coubard |
638:c90ae1400bf2 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Vincent Coubard |
638:c90ae1400bf2 | 30 | * |
Vincent Coubard |
638:c90ae1400bf2 | 31 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 32 | |
Vincent Coubard |
638:c90ae1400bf2 | 33 | #ifndef FDS_H__ |
Vincent Coubard |
638:c90ae1400bf2 | 34 | #define FDS_H__ |
Vincent Coubard |
638:c90ae1400bf2 | 35 | |
Vincent Coubard |
638:c90ae1400bf2 | 36 | /** |
Vincent Coubard |
638:c90ae1400bf2 | 37 | * @defgroup flash_data_storage Flash Data Storage |
Vincent Coubard |
638:c90ae1400bf2 | 38 | * @ingroup app_common |
Vincent Coubard |
638:c90ae1400bf2 | 39 | * @{ |
Vincent Coubard |
638:c90ae1400bf2 | 40 | * @brief Flash Data Storage (FDS). |
Vincent Coubard |
638:c90ae1400bf2 | 41 | * |
Vincent Coubard |
638:c90ae1400bf2 | 42 | * @details Flash Data Storage (FDS) is a minimalistic filesystem for the on-chip flash. |
Vincent Coubard |
638:c90ae1400bf2 | 43 | * It can be used to manipulate @e records, which consist of a piece of data, made up |
Vincent Coubard |
638:c90ae1400bf2 | 44 | * of one or more chunks, and an associated key pair. |
Vincent Coubard |
638:c90ae1400bf2 | 45 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 46 | |
Vincent Coubard |
638:c90ae1400bf2 | 47 | #include <stdint.h> |
Vincent Coubard |
638:c90ae1400bf2 | 48 | #include <stdbool.h> |
Vincent Coubard |
638:c90ae1400bf2 | 49 | #include "sdk_errors.h" |
Vincent Coubard |
638:c90ae1400bf2 | 50 | |
Vincent Coubard |
638:c90ae1400bf2 | 51 | |
Vincent Coubard |
638:c90ae1400bf2 | 52 | /**@brief */ |
Vincent Coubard |
638:c90ae1400bf2 | 53 | #define SIZEOF_WORDS(val) (sizeof(val) / 4) |
Vincent Coubard |
638:c90ae1400bf2 | 54 | |
Vincent Coubard |
638:c90ae1400bf2 | 55 | /**@brief Reserved type key used to flag cleared records. |
Vincent Coubard |
638:c90ae1400bf2 | 56 | * May not be used as a record key by the application. */ |
Vincent Coubard |
638:c90ae1400bf2 | 57 | #define FDS_TYPE_ID_INVALID (0x0000) |
Vincent Coubard |
638:c90ae1400bf2 | 58 | /**@brief Reserved instance key used to check for missing or corrupted metadata. |
Vincent Coubard |
638:c90ae1400bf2 | 59 | * May not be used as a record key by the application. */ |
Vincent Coubard |
638:c90ae1400bf2 | 60 | #define FDS_INSTANCE_ID_INVALID (0xFFFF) |
Vincent Coubard |
638:c90ae1400bf2 | 61 | |
Vincent Coubard |
638:c90ae1400bf2 | 62 | |
Vincent Coubard |
638:c90ae1400bf2 | 63 | typedef uint32_t fds_record_id_t; |
Vincent Coubard |
638:c90ae1400bf2 | 64 | typedef uint16_t fds_type_id_t; |
Vincent Coubard |
638:c90ae1400bf2 | 65 | typedef uint16_t fds_length_t; |
Vincent Coubard |
638:c90ae1400bf2 | 66 | typedef uint16_t fds_instance_id_t; |
Vincent Coubard |
638:c90ae1400bf2 | 67 | typedef uint16_t fds_checksum_t; |
Vincent Coubard |
638:c90ae1400bf2 | 68 | |
Vincent Coubard |
638:c90ae1400bf2 | 69 | |
Vincent Coubard |
638:c90ae1400bf2 | 70 | /**@brief A piece of a record metadata, keeping information about one of its keys (type) and its |
Vincent Coubard |
638:c90ae1400bf2 | 71 | * lenght, expressed in 4 byte words. */ |
Vincent Coubard |
638:c90ae1400bf2 | 72 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 73 | { |
Vincent Coubard |
638:c90ae1400bf2 | 74 | fds_type_id_t type; /**< The record type ID. */ |
Vincent Coubard |
638:c90ae1400bf2 | 75 | fds_length_t length_words; /**< Length of the record's data, in 4 byte words. */ |
Vincent Coubard |
638:c90ae1400bf2 | 76 | } fds_tl_t; |
Vincent Coubard |
638:c90ae1400bf2 | 77 | |
Vincent Coubard |
638:c90ae1400bf2 | 78 | |
Vincent Coubard |
638:c90ae1400bf2 | 79 | /**@brief A piece of a record metadata, keeping information about one of its keys (instance) and |
Vincent Coubard |
638:c90ae1400bf2 | 80 | * its checksum. */ |
Vincent Coubard |
638:c90ae1400bf2 | 81 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 82 | { |
Vincent Coubard |
638:c90ae1400bf2 | 83 | fds_instance_id_t instance; /**< The record instance ID. */ |
Vincent Coubard |
638:c90ae1400bf2 | 84 | fds_checksum_t checksum; /**< Checksum of the entire record, including the metadata. */ |
Vincent Coubard |
638:c90ae1400bf2 | 85 | } fds_ic_t; |
Vincent Coubard |
638:c90ae1400bf2 | 86 | |
Vincent Coubard |
638:c90ae1400bf2 | 87 | |
Vincent Coubard |
638:c90ae1400bf2 | 88 | /**@brief The record metadata. */ |
Vincent Coubard |
638:c90ae1400bf2 | 89 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 90 | { |
Vincent Coubard |
638:c90ae1400bf2 | 91 | fds_tl_t tl; /**< See @ref fds_tl_t. */ |
Vincent Coubard |
638:c90ae1400bf2 | 92 | fds_ic_t ic; /**< See @ref fds_ic_t. */ |
Vincent Coubard |
638:c90ae1400bf2 | 93 | fds_record_id_t id; /**< The unique record ID (32 bits). */ |
Vincent Coubard |
638:c90ae1400bf2 | 94 | } fds_header_t; |
Vincent Coubard |
638:c90ae1400bf2 | 95 | |
Vincent Coubard |
638:c90ae1400bf2 | 96 | |
Vincent Coubard |
638:c90ae1400bf2 | 97 | typedef fds_header_t fds_record_header_t; |
Vincent Coubard |
638:c90ae1400bf2 | 98 | |
Vincent Coubard |
638:c90ae1400bf2 | 99 | /**@brief The record descriptor structure, used to manipulate a record. |
Vincent Coubard |
638:c90ae1400bf2 | 100 | * @note This structure is meant to be opaque to the user, who does not need to access |
Vincent Coubard |
638:c90ae1400bf2 | 101 | * any of its fields. |
Vincent Coubard |
638:c90ae1400bf2 | 102 | * @note This structure does not need special initialization. |
Vincent Coubard |
638:c90ae1400bf2 | 103 | * @warning Do not reuse the same descriptor for different records. If you do, be sure to set |
Vincent Coubard |
638:c90ae1400bf2 | 104 | * its fields to zero. */ |
Vincent Coubard |
638:c90ae1400bf2 | 105 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 106 | { |
Vincent Coubard |
638:c90ae1400bf2 | 107 | uint32_t record_id; /**< The unique record ID. */ |
Vincent Coubard |
638:c90ae1400bf2 | 108 | uint32_t const * p_rec; /**< The last known record address in flash. */ |
Vincent Coubard |
638:c90ae1400bf2 | 109 | uint16_t vpage_id; /**< The virtual page ID in which the record is stored. */ |
Vincent Coubard |
638:c90ae1400bf2 | 110 | uint16_t gc_magic; /**< Number of times the GC algorithm has been run. */ |
Vincent Coubard |
638:c90ae1400bf2 | 111 | uint16_t ptr_magic; /**< Used to verify the validity of p_rec. */ |
Vincent Coubard |
638:c90ae1400bf2 | 112 | } fds_record_desc_t; |
Vincent Coubard |
638:c90ae1400bf2 | 113 | |
Vincent Coubard |
638:c90ae1400bf2 | 114 | |
Vincent Coubard |
638:c90ae1400bf2 | 115 | /**@brief The record key, used to lookup records. |
Vincent Coubard |
638:c90ae1400bf2 | 116 | * @note The uniqueness of either field is not enforced by the system. */ |
Vincent Coubard |
638:c90ae1400bf2 | 117 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 118 | { |
Vincent Coubard |
638:c90ae1400bf2 | 119 | uint16_t type; |
Vincent Coubard |
638:c90ae1400bf2 | 120 | uint16_t instance; |
Vincent Coubard |
638:c90ae1400bf2 | 121 | } fds_record_key_t; |
Vincent Coubard |
638:c90ae1400bf2 | 122 | |
Vincent Coubard |
638:c90ae1400bf2 | 123 | |
Vincent Coubard |
638:c90ae1400bf2 | 124 | /**@brief Structure used for reading a record back from flash memory. */ |
Vincent Coubard |
638:c90ae1400bf2 | 125 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 126 | { |
Vincent Coubard |
638:c90ae1400bf2 | 127 | // TODO: the header should be a pointer. |
Vincent Coubard |
638:c90ae1400bf2 | 128 | fds_header_t header; /**< The record header (metadata), as stored in flash. */ |
Vincent Coubard |
638:c90ae1400bf2 | 129 | uint32_t const * p_data; /**< The record data. */ |
Vincent Coubard |
638:c90ae1400bf2 | 130 | } fds_record_t; |
Vincent Coubard |
638:c90ae1400bf2 | 131 | |
Vincent Coubard |
638:c90ae1400bf2 | 132 | |
Vincent Coubard |
638:c90ae1400bf2 | 133 | /**@brief A record chunk, containing a piece of data to be stored in a record. |
Vincent Coubard |
638:c90ae1400bf2 | 134 | * |
Vincent Coubard |
638:c90ae1400bf2 | 135 | * @note p_data must be aligned on a (4 bytes) word boundary. |
Vincent Coubard |
638:c90ae1400bf2 | 136 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 137 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 138 | { |
Vincent Coubard |
638:c90ae1400bf2 | 139 | void const * p_data; /**< Pointer to the data to store. Must be word aligned. */ |
Vincent Coubard |
638:c90ae1400bf2 | 140 | fds_length_t length_words; /**< Length of data pointed by p_data, in 4 byte words. */ |
Vincent Coubard |
638:c90ae1400bf2 | 141 | } fds_record_chunk_t; |
Vincent Coubard |
638:c90ae1400bf2 | 142 | |
Vincent Coubard |
638:c90ae1400bf2 | 143 | |
Vincent Coubard |
638:c90ae1400bf2 | 144 | /**@brief A token to a reserved space in flash, created by @ref fds_reserve. |
Vincent Coubard |
638:c90ae1400bf2 | 145 | * Use @ref fds_write_reserved to write the record in the reserved space, |
Vincent Coubard |
638:c90ae1400bf2 | 146 | * or @ref fds_reserve_cancel to cancel the reservation. |
Vincent Coubard |
638:c90ae1400bf2 | 147 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 148 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 149 | { |
Vincent Coubard |
638:c90ae1400bf2 | 150 | uint16_t vpage_id; /**< The virtual ID of the page where space was reserved. */ |
Vincent Coubard |
638:c90ae1400bf2 | 151 | fds_length_t length_words; /**< The amount of space reserved, in 4 byte words. */ |
Vincent Coubard |
638:c90ae1400bf2 | 152 | } fds_write_token_t; |
Vincent Coubard |
638:c90ae1400bf2 | 153 | |
Vincent Coubard |
638:c90ae1400bf2 | 154 | |
Vincent Coubard |
638:c90ae1400bf2 | 155 | /**@brief A token to keep information about the progress of @ref fds_find, @ref fds_find_by_type |
Vincent Coubard |
638:c90ae1400bf2 | 156 | * and @ref fds_find_by_instance operations. |
Vincent Coubard |
638:c90ae1400bf2 | 157 | * @note This structure is meant to be opaque to the user, who does not need to access any of its |
Vincent Coubard |
638:c90ae1400bf2 | 158 | * fields. |
Vincent Coubard |
638:c90ae1400bf2 | 159 | * @note The token does not need special initialization. |
Vincent Coubard |
638:c90ae1400bf2 | 160 | * @warning Do not reuse the same token to search for different records. If you do, be sure to set |
Vincent Coubard |
638:c90ae1400bf2 | 161 | * its fields to zero. */ |
Vincent Coubard |
638:c90ae1400bf2 | 162 | typedef struct |
Vincent Coubard |
638:c90ae1400bf2 | 163 | { |
Vincent Coubard |
638:c90ae1400bf2 | 164 | uint32_t const * p_addr; |
Vincent Coubard |
638:c90ae1400bf2 | 165 | uint32_t magic; |
Vincent Coubard |
638:c90ae1400bf2 | 166 | uint16_t vpage_id; |
Vincent Coubard |
638:c90ae1400bf2 | 167 | } fds_find_token_t; |
Vincent Coubard |
638:c90ae1400bf2 | 168 | |
Vincent Coubard |
638:c90ae1400bf2 | 169 | |
Vincent Coubard |
638:c90ae1400bf2 | 170 | typedef enum |
Vincent Coubard |
638:c90ae1400bf2 | 171 | { |
Vincent Coubard |
638:c90ae1400bf2 | 172 | FDS_CMD_NONE, /**< No command. */ |
Vincent Coubard |
638:c90ae1400bf2 | 173 | FDS_CMD_INIT, /**< Module initialization commnad. Used in @ref fds_init */ |
Vincent Coubard |
638:c90ae1400bf2 | 174 | FDS_CMD_WRITE, /**< Write command. Used in @ref fds_write and @ref fds_write_reserved. */ |
Vincent Coubard |
638:c90ae1400bf2 | 175 | FDS_CMD_UPDATE, /**< Update command. Used in @ref fds_update. */ |
Vincent Coubard |
638:c90ae1400bf2 | 176 | FDS_CMD_CLEAR, /**< Clear record command. Used in @ref fds_clear and @ref fds_update. */ |
Vincent Coubard |
638:c90ae1400bf2 | 177 | FDS_CMD_CLEAR_INST, /**< Clear instance command. Used in @ref fds_clear_by_instance. */ |
Vincent Coubard |
638:c90ae1400bf2 | 178 | FDS_CMD_GC /**< Garbage collection. Used in @ref fds_gc. */ |
Vincent Coubard |
638:c90ae1400bf2 | 179 | } fds_cmd_id_t; |
Vincent Coubard |
638:c90ae1400bf2 | 180 | |
Vincent Coubard |
638:c90ae1400bf2 | 181 | |
Vincent Coubard |
638:c90ae1400bf2 | 182 | /**@brief Flash data storage callback function. |
Vincent Coubard |
638:c90ae1400bf2 | 183 | * |
Vincent Coubard |
638:c90ae1400bf2 | 184 | * @param result Result of the command. |
Vincent Coubard |
638:c90ae1400bf2 | 185 | * @param cmd The command associated with the callback. |
Vincent Coubard |
638:c90ae1400bf2 | 186 | * @param record_id The unique ID of the record associated with the callback. |
Vincent Coubard |
638:c90ae1400bf2 | 187 | * @param record_key The key pair of the record associated with the callback. |
Vincent Coubard |
638:c90ae1400bf2 | 188 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 189 | typedef void (*fds_cb_t)(ret_code_t result, |
Vincent Coubard |
638:c90ae1400bf2 | 190 | fds_cmd_id_t cmd, |
Vincent Coubard |
638:c90ae1400bf2 | 191 | fds_record_id_t record_id, |
Vincent Coubard |
638:c90ae1400bf2 | 192 | fds_record_key_t record_key); |
Vincent Coubard |
638:c90ae1400bf2 | 193 | |
Vincent Coubard |
638:c90ae1400bf2 | 194 | |
Vincent Coubard |
638:c90ae1400bf2 | 195 | /**@brief Function to register a callback for the module events. |
Vincent Coubard |
638:c90ae1400bf2 | 196 | * @details The maximum amount of callback which can be registered can be configured by |
Vincent Coubard |
638:c90ae1400bf2 | 197 | * changing the FDS_MAX_USERS macro in fds_config.h. |
Vincent Coubard |
638:c90ae1400bf2 | 198 | * |
Vincent Coubard |
638:c90ae1400bf2 | 199 | * @param[in] cb The callback function. |
Vincent Coubard |
638:c90ae1400bf2 | 200 | * |
Vincent Coubard |
638:c90ae1400bf2 | 201 | * |
Vincent Coubard |
638:c90ae1400bf2 | 202 | * @retval NRF_SUCCESS Success. |
Vincent Coubard |
638:c90ae1400bf2 | 203 | * @retval NRF_ERROR_NO_MEM Error. Maximum number of registered callbacks reached. |
Vincent Coubard |
638:c90ae1400bf2 | 204 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 205 | ret_code_t fds_register(fds_cb_t cb); |
Vincent Coubard |
638:c90ae1400bf2 | 206 | |
Vincent Coubard |
638:c90ae1400bf2 | 207 | |
Vincent Coubard |
638:c90ae1400bf2 | 208 | /**@brief Function to initialize the module. |
Vincent Coubard |
638:c90ae1400bf2 | 209 | * |
Vincent Coubard |
638:c90ae1400bf2 | 210 | * @details This function initializes the module and installs the filesystem, if it is not |
Vincent Coubard |
638:c90ae1400bf2 | 211 | * installed yet. |
Vincent Coubard |
638:c90ae1400bf2 | 212 | * |
Vincent Coubard |
638:c90ae1400bf2 | 213 | * @note This function is asynchronous. Completion is reported with a callback through the |
Vincent Coubard |
638:c90ae1400bf2 | 214 | * registered event handler. To be able to receive such callback, be sure to call |
Vincent Coubard |
638:c90ae1400bf2 | 215 | * @ref fds_register before calling @ref fds_init. |
Vincent Coubard |
638:c90ae1400bf2 | 216 | * |
Vincent Coubard |
638:c90ae1400bf2 | 217 | * @retval NRF_SUCCESS Success. The command was queued. |
Vincent Coubard |
638:c90ae1400bf2 | 218 | * @retval NRF_ERROR_INVALID_STATE Error. The module is currently undergoing initialization. |
Vincent Coubard |
638:c90ae1400bf2 | 219 | * @retval NRF_ERROR_NO_MEM Error. Insufficient space to install the filesystem, or |
Vincent Coubard |
638:c90ae1400bf2 | 220 | * insufficient resources to perform the installation. |
Vincent Coubard |
638:c90ae1400bf2 | 221 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 222 | ret_code_t fds_init(void); |
Vincent Coubard |
638:c90ae1400bf2 | 223 | |
Vincent Coubard |
638:c90ae1400bf2 | 224 | |
Vincent Coubard |
638:c90ae1400bf2 | 225 | /**@brief Function to write a record to flash. |
Vincent Coubard |
638:c90ae1400bf2 | 226 | * |
Vincent Coubard |
638:c90ae1400bf2 | 227 | * @details This function can be used to write a record to flash. A record data consists of |
Vincent Coubard |
638:c90ae1400bf2 | 228 | * multiple chunks and is supplied to the function as an array of fds_record_chunk_t |
Vincent Coubard |
638:c90ae1400bf2 | 229 | * structures. The maximum lenght of a record data may not exceed the size of one flash |
Vincent Coubard |
638:c90ae1400bf2 | 230 | * page minus FDS_HEADER_SIZE words. |
Vincent Coubard |
638:c90ae1400bf2 | 231 | * |
Vincent Coubard |
638:c90ae1400bf2 | 232 | * @note This function is asynchronous, therefore, completion is reported with a callback |
Vincent Coubard |
638:c90ae1400bf2 | 233 | * through the registered event handler. |
Vincent Coubard |
638:c90ae1400bf2 | 234 | * |
Vincent Coubard |
638:c90ae1400bf2 | 235 | * @note The record data must be aligned on a 4 byte boundary, and because it is not buffered |
Vincent Coubard |
638:c90ae1400bf2 | 236 | * internally, it must be kept in memory by the application until the callback for the |
Vincent Coubard |
638:c90ae1400bf2 | 237 | * command has been received, i.e., the command completed. |
Vincent Coubard |
638:c90ae1400bf2 | 238 | * |
Vincent Coubard |
638:c90ae1400bf2 | 239 | * @param[out] p_desc The record descriptor. It may be NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 240 | * @param[in] key The record key pair. |
Vincent Coubard |
638:c90ae1400bf2 | 241 | * @param[in] num_chunks The number of elements in the chunks array. |
Vincent Coubard |
638:c90ae1400bf2 | 242 | * @param[in] chunks An array of chunks making up the record data. |
Vincent Coubard |
638:c90ae1400bf2 | 243 | * |
Vincent Coubard |
638:c90ae1400bf2 | 244 | * @retval NRF_SUCCESS Success. The command was queued. |
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638:c90ae1400bf2 | 245 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
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638:c90ae1400bf2 | 246 | * @retval NRF_ERROR_INVALID_DATA Error. The key contains an invalid type or instance. |
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638:c90ae1400bf2 | 247 | * @retval NRF_ERROR_INVALID_ADDR Error. The record data is not aligned on a 4 byte boundary. |
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638:c90ae1400bf2 | 248 | * @retval NRF_ERROR_INVALID_LENGTH Error. The record length exceeds the maximum lenght. |
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638:c90ae1400bf2 | 249 | * @retval NRF_ERROR_BUSY Error. Insufficient internal resources to queue the operation. |
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638:c90ae1400bf2 | 250 | * @retval NRF_ERROR_NO_MEM Error. No flash space available to store the record. |
Vincent Coubard |
638:c90ae1400bf2 | 251 | */ |
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638:c90ae1400bf2 | 252 | ret_code_t fds_write(fds_record_desc_t * const p_desc, |
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638:c90ae1400bf2 | 253 | fds_record_key_t key, |
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638:c90ae1400bf2 | 254 | uint8_t num_chunks, |
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638:c90ae1400bf2 | 255 | fds_record_chunk_t chunks[]); |
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638:c90ae1400bf2 | 256 | |
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638:c90ae1400bf2 | 257 | |
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638:c90ae1400bf2 | 258 | /**@brief Function to reserve space for a record. |
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638:c90ae1400bf2 | 259 | * |
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638:c90ae1400bf2 | 260 | * @details This function can be used to reserve flash space to store a record, which can be |
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638:c90ae1400bf2 | 261 | * later written down using @ref fds_write_reserved. It is possible to cancel a |
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638:c90ae1400bf2 | 262 | * reservation by using @ref fds_reserve_cancel. |
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638:c90ae1400bf2 | 263 | * |
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638:c90ae1400bf2 | 264 | * @param[out] p_tok A token which can be used to write a record in the reserved space |
Vincent Coubard |
638:c90ae1400bf2 | 265 | * using @ref fds_write_reserved. |
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638:c90ae1400bf2 | 266 | * @param[in] length_words The lenght of the record data, in 4 byte words. |
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638:c90ae1400bf2 | 267 | * |
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638:c90ae1400bf2 | 268 | * @retval NRF_SUCCESS Success. Flash space was successfully reserved. |
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638:c90ae1400bf2 | 269 | * @retval NRF_ERROR_NULL Error. p_tok is NULL. |
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638:c90ae1400bf2 | 270 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
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638:c90ae1400bf2 | 271 | * @retval NRF_ERROR_NO_MEM Error. Insufficient space. |
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638:c90ae1400bf2 | 272 | */ |
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638:c90ae1400bf2 | 273 | ret_code_t fds_reserve(fds_write_token_t * const p_tok, uint16_t length_words); |
Vincent Coubard |
638:c90ae1400bf2 | 274 | |
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638:c90ae1400bf2 | 275 | |
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638:c90ae1400bf2 | 276 | /**@brief Function to cancel a space reservation. |
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638:c90ae1400bf2 | 277 | * |
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638:c90ae1400bf2 | 278 | * @param[in] p_tok The token produced by @ref fds_reserve, identifying the reservation to cancel. |
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638:c90ae1400bf2 | 279 | * |
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638:c90ae1400bf2 | 280 | * @retval NRF_SUCCESS Success. The reservation was canceled. |
Vincent Coubard |
638:c90ae1400bf2 | 281 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
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638:c90ae1400bf2 | 282 | * @retval NRF_ERROR_NULL Error. p_tok is NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 283 | * @retval NRF_ERROR_INVALID_DATA Error. p_tok contains invalid data. |
Vincent Coubard |
638:c90ae1400bf2 | 284 | */ |
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638:c90ae1400bf2 | 285 | ret_code_t fds_reserve_cancel(fds_write_token_t * const p_tok); |
Vincent Coubard |
638:c90ae1400bf2 | 286 | |
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638:c90ae1400bf2 | 287 | |
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638:c90ae1400bf2 | 288 | /**@brief Function to write a record to flash, the space for which has been previously reserved |
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638:c90ae1400bf2 | 289 | * using @ref fds_reserve. |
Vincent Coubard |
638:c90ae1400bf2 | 290 | * |
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638:c90ae1400bf2 | 291 | * @details This function behaves similarly to @ref fds_write, with the exception that it never |
Vincent Coubard |
638:c90ae1400bf2 | 292 | * fails with NRF_ERROR_NO_MEM. |
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638:c90ae1400bf2 | 293 | * |
Vincent Coubard |
638:c90ae1400bf2 | 294 | * @note This function is asynchronous, therefore, completion is reported with a callback |
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638:c90ae1400bf2 | 295 | * through the registered event handler. |
Vincent Coubard |
638:c90ae1400bf2 | 296 | * |
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638:c90ae1400bf2 | 297 | * @note The record data must be aligned on a 4 byte boundary, and because it is not buffered |
Vincent Coubard |
638:c90ae1400bf2 | 298 | * internally, it must be kept in memory by the application until the callback for the |
Vincent Coubard |
638:c90ae1400bf2 | 299 | * command has been received, i.e., the command completed. |
Vincent Coubard |
638:c90ae1400bf2 | 300 | * |
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638:c90ae1400bf2 | 301 | * @param[in] p_tok The token return by @ref fds_reserve. |
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638:c90ae1400bf2 | 302 | * @param[out] p_desc The record descriptor. It may be NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 303 | * @param[in] key The record key pair. |
Vincent Coubard |
638:c90ae1400bf2 | 304 | * @param[in] num_chunks The number of elements in the chunks array. |
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638:c90ae1400bf2 | 305 | * @param[in] chunks An array of chunks making up the record data. |
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638:c90ae1400bf2 | 306 | * |
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638:c90ae1400bf2 | 307 | * @retval NRF_SUCCESS Success. The command was queued. |
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638:c90ae1400bf2 | 308 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
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638:c90ae1400bf2 | 309 | * @retval NRF_ERROR_INVALID_DATA Error. The key contains an invalid type or instance. |
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638:c90ae1400bf2 | 310 | * @retval NRF_ERROR_INVALID_ADDR Error. The record data is not aligned on a 4 byte boundary. |
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638:c90ae1400bf2 | 311 | * @retval NRF_ERROR_INVALID_LENGTH Error. The record length exceeds the maximum lenght. |
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638:c90ae1400bf2 | 312 | * @retval NRF_ERROR_BUSY Error. Insufficient internal resources to queue the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 313 | */ |
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638:c90ae1400bf2 | 314 | ret_code_t fds_write_reserved(fds_write_token_t const * const p_tok, |
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638:c90ae1400bf2 | 315 | fds_record_desc_t * const p_desc, |
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638:c90ae1400bf2 | 316 | fds_record_key_t key, |
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638:c90ae1400bf2 | 317 | uint8_t num_chunks, |
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638:c90ae1400bf2 | 318 | fds_record_chunk_t chunks[]); |
Vincent Coubard |
638:c90ae1400bf2 | 319 | |
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638:c90ae1400bf2 | 320 | |
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638:c90ae1400bf2 | 321 | /**@brief Function to clear a record. |
Vincent Coubard |
638:c90ae1400bf2 | 322 | * |
Vincent Coubard |
638:c90ae1400bf2 | 323 | * @details Clearing a record has the effect of preventing the system from retrieving the record |
Vincent Coubard |
638:c90ae1400bf2 | 324 | * descriptor using the @ref fds_find, @ref fds_find_by_type and @ref fds_find_by_instance |
Vincent Coubard |
638:c90ae1400bf2 | 325 | * functions. Additionally, @ref fds_open calls shall fail when supplied a descritpor for |
Vincent Coubard |
638:c90ae1400bf2 | 326 | * a record which has been cleared. Clearing a record does not free the space it occupies |
Vincent Coubard |
638:c90ae1400bf2 | 327 | * in flash. The reclaim flash space used by cleared records, use @ref fds_gc. |
Vincent Coubard |
638:c90ae1400bf2 | 328 | * |
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638:c90ae1400bf2 | 329 | * @note This function is asynchronous, therefore, completion is reported with a callback |
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638:c90ae1400bf2 | 330 | * through the registered event handler. |
Vincent Coubard |
638:c90ae1400bf2 | 331 | * |
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638:c90ae1400bf2 | 332 | * @param[in] p_desc The descriptor of the record to clear. |
Vincent Coubard |
638:c90ae1400bf2 | 333 | * |
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638:c90ae1400bf2 | 334 | * @retval NRF_SUCCESS Success. The command was queued. |
Vincent Coubard |
638:c90ae1400bf2 | 335 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
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638:c90ae1400bf2 | 336 | * @retval NRF_ERROR_NULL Error. p_desc is NULL. |
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638:c90ae1400bf2 | 337 | * @retval NRF_ERROR_BUSY Error. Insufficient internal resources to queue the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 338 | */ |
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638:c90ae1400bf2 | 339 | ret_code_t fds_clear(fds_record_desc_t * const p_desc); |
Vincent Coubard |
638:c90ae1400bf2 | 340 | |
Vincent Coubard |
638:c90ae1400bf2 | 341 | |
Vincent Coubard |
638:c90ae1400bf2 | 342 | /**@brief Function to clear all records with a given instance. |
Vincent Coubard |
638:c90ae1400bf2 | 343 | * |
Vincent Coubard |
638:c90ae1400bf2 | 344 | * @details Clearing a record has the effect of preventing the system from retrieving the record |
Vincent Coubard |
638:c90ae1400bf2 | 345 | * descriptor using the @ref fds_find, @ref fds_find_by_type and @ref fds_find_by_instance |
Vincent Coubard |
638:c90ae1400bf2 | 346 | * functions. Additionally, @ref fds_open calls shall fail when supplied a descritpor for |
Vincent Coubard |
638:c90ae1400bf2 | 347 | * a record which has been cleared. Clearing a record does not free the space it occupies |
Vincent Coubard |
638:c90ae1400bf2 | 348 | * in flash. The reclaim flash space used by cleared records, use @ref fds_gc. |
Vincent Coubard |
638:c90ae1400bf2 | 349 | * |
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638:c90ae1400bf2 | 350 | * @note This function is asynchronous, therefore, completion is reported with a callback |
Vincent Coubard |
638:c90ae1400bf2 | 351 | * through the registered event handler. Only one callback will be issued. The record |
Vincent Coubard |
638:c90ae1400bf2 | 352 | * instance ID in the key parameter of the callback will contain the instance ID passed as |
Vincent Coubard |
638:c90ae1400bf2 | 353 | * parameter to this function. The record ID parameter will be zero, and the type ID equal |
Vincent Coubard |
638:c90ae1400bf2 | 354 | * to FDS_TYPE_ID_INVALID. |
Vincent Coubard |
638:c90ae1400bf2 | 355 | * |
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638:c90ae1400bf2 | 356 | * @param[in] instance The instance ID of the records to clear. |
Vincent Coubard |
638:c90ae1400bf2 | 357 | * |
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638:c90ae1400bf2 | 358 | * @retval NRF_SUCCESS Success. The command was queued. |
Vincent Coubard |
638:c90ae1400bf2 | 359 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
Vincent Coubard |
638:c90ae1400bf2 | 360 | * @retval NRF_ERROR_NULL Error. p_desc is NULL. |
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638:c90ae1400bf2 | 361 | * @retval NRF_ERROR_BUSY Error. Insufficient internal resources to queue the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 362 | */ |
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638:c90ae1400bf2 | 363 | ret_code_t fds_clear_by_instance(fds_instance_id_t instance); |
Vincent Coubard |
638:c90ae1400bf2 | 364 | |
Vincent Coubard |
638:c90ae1400bf2 | 365 | |
Vincent Coubard |
638:c90ae1400bf2 | 366 | /**@brief Function to update an existing record. |
Vincent Coubard |
638:c90ae1400bf2 | 367 | * |
Vincent Coubard |
638:c90ae1400bf2 | 368 | * @details Updating a record writes a new record with the given key and data in flash, and then |
Vincent Coubard |
638:c90ae1400bf2 | 369 | * clears the old record. |
Vincent Coubard |
638:c90ae1400bf2 | 370 | * |
Vincent Coubard |
638:c90ae1400bf2 | 371 | * @note This function is asynchronous, therefore, completion is reported with a callback |
Vincent Coubard |
638:c90ae1400bf2 | 372 | * through the registered event handler. Two callbacks will be issued, one to signal that |
Vincent Coubard |
638:c90ae1400bf2 | 373 | * the updated record has been written down, and another to signal that the old one has been |
Vincent Coubard |
638:c90ae1400bf2 | 374 | * cleared. |
Vincent Coubard |
638:c90ae1400bf2 | 375 | * |
Vincent Coubard |
638:c90ae1400bf2 | 376 | * @note The record data must be aligned on a 4 byte boundary, and because it is not buffered |
Vincent Coubard |
638:c90ae1400bf2 | 377 | * internally, it must be kept in memory by the application until the callback for the |
Vincent Coubard |
638:c90ae1400bf2 | 378 | * command has been received, i.e., the command completed. |
Vincent Coubard |
638:c90ae1400bf2 | 379 | * |
Vincent Coubard |
638:c90ae1400bf2 | 380 | * @param[in, out] p_desc The descriptor of the record to update. The descriptor of the updated |
Vincent Coubard |
638:c90ae1400bf2 | 381 | * record, after the function has returned with NRF_SUCCESS. |
Vincent Coubard |
638:c90ae1400bf2 | 382 | * @param[in] key The record new key pair. |
Vincent Coubard |
638:c90ae1400bf2 | 383 | * @param[in] num_chunks The number of elements in the chunks array. |
Vincent Coubard |
638:c90ae1400bf2 | 384 | * @param[in] chunks An array of chunks making up the record new data. |
Vincent Coubard |
638:c90ae1400bf2 | 385 | * |
Vincent Coubard |
638:c90ae1400bf2 | 386 | * @retval NRF_SUCCESS Success. The command was queued. |
Vincent Coubard |
638:c90ae1400bf2 | 387 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
Vincent Coubard |
638:c90ae1400bf2 | 388 | * @retval NRF_ERROR_INVALID_DATA Error. The key contains an invalid type or instance. |
Vincent Coubard |
638:c90ae1400bf2 | 389 | * @retval NRF_ERROR_INVALID_ADDR Error. The record data is not aligned on a 4 byte boundary. |
Vincent Coubard |
638:c90ae1400bf2 | 390 | * @retval NRF_ERROR_INVALID_LENGTH Error. The record length exceeds the maximum lenght. |
Vincent Coubard |
638:c90ae1400bf2 | 391 | * @retval NRF_ERROR_BUSY Error. Insufficient internal resources to queue the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 392 | * @retval NRF_ERROR_NO_MEM Error. No flash space available to store the record. |
Vincent Coubard |
638:c90ae1400bf2 | 393 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 394 | ret_code_t fds_update(fds_record_desc_t * const p_desc, |
Vincent Coubard |
638:c90ae1400bf2 | 395 | fds_record_key_t key, |
Vincent Coubard |
638:c90ae1400bf2 | 396 | uint8_t num_chunks, |
Vincent Coubard |
638:c90ae1400bf2 | 397 | fds_record_chunk_t chunks[]); |
Vincent Coubard |
638:c90ae1400bf2 | 398 | |
Vincent Coubard |
638:c90ae1400bf2 | 399 | |
Vincent Coubard |
638:c90ae1400bf2 | 400 | /**@brief Function to search for records with a given key pair. |
Vincent Coubard |
638:c90ae1400bf2 | 401 | * |
Vincent Coubard |
638:c90ae1400bf2 | 402 | * @details Because types are not unique, to search for the next record with the given key call |
Vincent Coubard |
638:c90ae1400bf2 | 403 | * the function again and supply the same fds_find_token_t structure to resume searching |
Vincent Coubard |
638:c90ae1400bf2 | 404 | * from the last record found. |
Vincent Coubard |
638:c90ae1400bf2 | 405 | * |
Vincent Coubard |
638:c90ae1400bf2 | 406 | * @param[in] type The record type ID. |
Vincent Coubard |
638:c90ae1400bf2 | 407 | * @param[in] instance The record instance ID. |
Vincent Coubard |
638:c90ae1400bf2 | 408 | * @param[out] p_desc The descriptor of the record found. |
Vincent Coubard |
638:c90ae1400bf2 | 409 | * @param[out] p_token A token containing information about the progress of the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 410 | * |
Vincent Coubard |
638:c90ae1400bf2 | 411 | * @retval NRF_SUCCESS Success. A record was found. |
Vincent Coubard |
638:c90ae1400bf2 | 412 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
Vincent Coubard |
638:c90ae1400bf2 | 413 | * @retval NRF_ERROR_NULL Error. Either p_desc or p_token are NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 414 | * @retval NRF_ERROR_NOT_FOUND Error. No record with the given key pair was found. |
Vincent Coubard |
638:c90ae1400bf2 | 415 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 416 | ret_code_t fds_find(fds_type_id_t type, |
Vincent Coubard |
638:c90ae1400bf2 | 417 | fds_instance_id_t instance, |
Vincent Coubard |
638:c90ae1400bf2 | 418 | fds_record_desc_t * const p_desc, |
Vincent Coubard |
638:c90ae1400bf2 | 419 | fds_find_token_t * const p_token); |
Vincent Coubard |
638:c90ae1400bf2 | 420 | |
Vincent Coubard |
638:c90ae1400bf2 | 421 | |
Vincent Coubard |
638:c90ae1400bf2 | 422 | /**@brief Function to search for records with a given type. |
Vincent Coubard |
638:c90ae1400bf2 | 423 | * |
Vincent Coubard |
638:c90ae1400bf2 | 424 | * @details Because types are not unique, to search for the next record with the given key call |
Vincent Coubard |
638:c90ae1400bf2 | 425 | * the function again and supply the same fds_find_token_t structure to resume searching |
Vincent Coubard |
638:c90ae1400bf2 | 426 | * from the last record found. |
Vincent Coubard |
638:c90ae1400bf2 | 427 | * |
Vincent Coubard |
638:c90ae1400bf2 | 428 | * @param[in] type The type ID in the record key. |
Vincent Coubard |
638:c90ae1400bf2 | 429 | * @param[out] p_desc The descriptor of the record found. |
Vincent Coubard |
638:c90ae1400bf2 | 430 | * @param[out] p_token A token containing information about the progress of the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 431 | * |
Vincent Coubard |
638:c90ae1400bf2 | 432 | * @retval NRF_SUCCESS Success. A record was found. |
Vincent Coubard |
638:c90ae1400bf2 | 433 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
Vincent Coubard |
638:c90ae1400bf2 | 434 | * @retval NRF_ERROR_NULL Error. Either p_desc or p_token are NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 435 | * @retval NRF_ERROR_NOT_FOUND Error. No record with the given type was found. |
Vincent Coubard |
638:c90ae1400bf2 | 436 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 437 | ret_code_t fds_find_by_type(fds_type_id_t type, |
Vincent Coubard |
638:c90ae1400bf2 | 438 | fds_record_desc_t * const p_desc, |
Vincent Coubard |
638:c90ae1400bf2 | 439 | fds_find_token_t * const p_token); |
Vincent Coubard |
638:c90ae1400bf2 | 440 | |
Vincent Coubard |
638:c90ae1400bf2 | 441 | |
Vincent Coubard |
638:c90ae1400bf2 | 442 | /**@brief Function to search for records with a given instance. |
Vincent Coubard |
638:c90ae1400bf2 | 443 | * |
Vincent Coubard |
638:c90ae1400bf2 | 444 | * @details Because types are not unique, to search for the next record with the given key call |
Vincent Coubard |
638:c90ae1400bf2 | 445 | * the function again and supply the same fds_find_token_t structure to resume searching |
Vincent Coubard |
638:c90ae1400bf2 | 446 | * from the last record found. |
Vincent Coubard |
638:c90ae1400bf2 | 447 | * |
Vincent Coubard |
638:c90ae1400bf2 | 448 | * @param[in] instance The instance ID in the record key. |
Vincent Coubard |
638:c90ae1400bf2 | 449 | * @param[out] p_desc The descriptor of the record found. |
Vincent Coubard |
638:c90ae1400bf2 | 450 | * @param[out] p_token A token containing information about the progress of the operation. |
Vincent Coubard |
638:c90ae1400bf2 | 451 | * |
Vincent Coubard |
638:c90ae1400bf2 | 452 | * @retval NRF_SUCCESS Success. A record was found. |
Vincent Coubard |
638:c90ae1400bf2 | 453 | * @retval NRF_ERROR_INVALID_STATE Error. The module is not initialized. |
Vincent Coubard |
638:c90ae1400bf2 | 454 | * @retval NRF_ERROR_NULL Error. Either p_desc or p_token are NULL. |
Vincent Coubard |
638:c90ae1400bf2 | 455 | * @retval NRF_ERROR_NOT_FOUND Error. No record with the given instance was found. |
Vincent Coubard |
638:c90ae1400bf2 | 456 | */ |
Vincent Coubard |
638:c90ae1400bf2 | 457 | ret_code_t fds_find_by_instance(fds_instance_id_t instance, |
Vincent Coubard |
638:c90ae1400bf2 | 458 | fds_record_desc_t * const p_desc, |
Vincent Coubard |
638:c90ae1400bf2 | 459 | fds_find_token_t * const p_token); |
Vincent Coubard |
638:c90ae1400bf2 | 460 | |
Vincent Coubard |
638:c90ae1400bf2 | 461 | |
Vincent Coubard |
638:c90ae1400bf2 | 462 | /**@brief Function to open a record for reading. |
Vincent Coubard |
638:c90ae1400bf2 | 463 | * |
Vincent Coubard |
638:c90ae1400bf2 | 464 | * @details Function to read a record which has been written to flash. This function initializes |
Vincent Coubard |
638:c90ae1400bf2 | 465 | * a fds_record_t structure which can be used to access the record data as well as |
Vincent Coubard |
638:c90ae1400bf2 | 466 | * its associated metadata. The pointers provided in the fds_record_t structure are |
Vincent Coubard |
638:c90ae1400bf2 | 467 | * pointers to flash memory. Opening a record with @ref fds_open prevents the garbage |
Vincent Coubard |
638:c90ae1400bf2 | 468 | * collection to run on the flash page in which record is stored, therefore the contents |
Vincent Coubard |
638:c90ae1400bf2 | 469 | * of the memory pointed by the fds_record_t p_data field is guaranteed to remain |
Vincent Coubard |
638:c90ae1400bf2 | 470 | * unmodified, as long as the record is kept open. |
Vincent Coubard |
638:c90ae1400bf2 | 471 | * |
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638:c90ae1400bf2 | 472 | * @note When you are done reading a record, close it using @ref fds_close so that successive |
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638:c90ae1400bf2 | 473 | * garbage collections can reclaim space on the page where the record is stored, if necessary. |
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638:c90ae1400bf2 | 474 | * |
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638:c90ae1400bf2 | 475 | * @param[in] p_desc The descriptor of the record to open. |
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638:c90ae1400bf2 | 476 | * @param[out] p_record The record data and metadata, as stored in flash. |
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638:c90ae1400bf2 | 477 | * |
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638:c90ae1400bf2 | 478 | * @retval NRF_SUCCESS Success. The record was opened. |
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638:c90ae1400bf2 | 479 | * @retval NRF_ERROR_NOT_FOUND Error. The record was not found. It may have been cleared, or it |
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638:c90ae1400bf2 | 480 | * may have not been written yet. |
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638:c90ae1400bf2 | 481 | * @retval NRF_ERROR_INVALID_DATA Error. The descriptor contains invalid data. |
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638:c90ae1400bf2 | 482 | * @retval NRF_ERROR_NULL Error. Either p_desc or p_record are NULL. |
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638:c90ae1400bf2 | 483 | */ |
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638:c90ae1400bf2 | 484 | ret_code_t fds_open(fds_record_desc_t * const p_desc, |
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638:c90ae1400bf2 | 485 | fds_record_t * const p_record); |
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638:c90ae1400bf2 | 486 | |
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638:c90ae1400bf2 | 487 | |
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638:c90ae1400bf2 | 488 | /**@brief Function to close a record, after its contents have been read. |
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638:c90ae1400bf2 | 489 | * |
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638:c90ae1400bf2 | 490 | * @details Closing a record allows garbage collection to be run on the page in which the |
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638:c90ae1400bf2 | 491 | * record being closed is stored (if no other records remain open on that page). |
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638:c90ae1400bf2 | 492 | * |
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638:c90ae1400bf2 | 493 | * @note Closing a record, does NOT invalidate its descriptor, which can be safely supplied to |
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638:c90ae1400bf2 | 494 | * all functions which accept a descriptor as a parameter. |
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638:c90ae1400bf2 | 495 | * |
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638:c90ae1400bf2 | 496 | * @param[in] p_desc The descriptor of the record to close. |
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638:c90ae1400bf2 | 497 | * |
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638:c90ae1400bf2 | 498 | * @retval NRF_SUCCESS Success. The record was closed. |
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638:c90ae1400bf2 | 499 | * @retval NRF_ERROR_NULL Error. p_desc is NULL. |
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638:c90ae1400bf2 | 500 | * @retval NRF_ERROR_INVALID_DATA Error. The descriptor contains invalid data. |
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638:c90ae1400bf2 | 501 | */ |
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638:c90ae1400bf2 | 502 | ret_code_t fds_close(fds_record_desc_t const * const p_desc); |
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638:c90ae1400bf2 | 503 | |
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638:c90ae1400bf2 | 504 | |
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638:c90ae1400bf2 | 505 | /**@brief Function to perform a garbage collection. |
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638:c90ae1400bf2 | 506 | * |
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638:c90ae1400bf2 | 507 | * @details Garbage collection reclaims the flash space occupied by records which have been cleared |
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638:c90ae1400bf2 | 508 | * using @ref fds_clear. |
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638:c90ae1400bf2 | 509 | * |
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638:c90ae1400bf2 | 510 | * @note This function is asynchronous, therefore, completion is reported with a callback |
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638:c90ae1400bf2 | 511 | * through the registered event handler. |
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638:c90ae1400bf2 | 512 | */ |
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638:c90ae1400bf2 | 513 | ret_code_t fds_gc(void); |
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638:c90ae1400bf2 | 514 | |
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638:c90ae1400bf2 | 515 | |
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638:c90ae1400bf2 | 516 | /**@brief Function to compare two record descriptors. |
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638:c90ae1400bf2 | 517 | * |
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638:c90ae1400bf2 | 518 | * @param[in] p_desc_one First descriptor. |
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638:c90ae1400bf2 | 519 | * @param[in] p_desc_two Second descriptor. |
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638:c90ae1400bf2 | 520 | * |
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638:c90ae1400bf2 | 521 | * @retval true If the descriptors identify the same record. |
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638:c90ae1400bf2 | 522 | * @retval false Otherwise. |
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638:c90ae1400bf2 | 523 | */ |
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638:c90ae1400bf2 | 524 | bool fds_descriptor_match(fds_record_desc_t const * const p_desc_one, |
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638:c90ae1400bf2 | 525 | fds_record_desc_t const * const p_desc_two); |
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638:c90ae1400bf2 | 526 | |
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638:c90ae1400bf2 | 527 | |
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638:c90ae1400bf2 | 528 | /**@brief Function to obtain a descriptor from a record ID. |
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638:c90ae1400bf2 | 529 | * |
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638:c90ae1400bf2 | 530 | * @details This function can be used to reconstruct a descriptor from a record ID, such as the |
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638:c90ae1400bf2 | 531 | * one passed to the callback function. |
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638:c90ae1400bf2 | 532 | * |
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638:c90ae1400bf2 | 533 | * @warning This function does not check if a record with the given record ID exists or not. If a |
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638:c90ae1400bf2 | 534 | * non-existing record ID is supplied, the resulting descriptor will cause other functions |
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638:c90ae1400bf2 | 535 | * to fail when used as parameter. |
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638:c90ae1400bf2 | 536 | * |
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638:c90ae1400bf2 | 537 | * @param[out] p_desc The descriptor of the record with given record ID. |
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638:c90ae1400bf2 | 538 | * @param[in] record_id The record ID for which to provide a descriptor. |
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638:c90ae1400bf2 | 539 | * |
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638:c90ae1400bf2 | 540 | * @retval NRF_SUCCESS Success. |
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638:c90ae1400bf2 | 541 | * @retval NRF_ERROR_NULL Error. p_desc is NULL. |
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638:c90ae1400bf2 | 542 | */ |
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638:c90ae1400bf2 | 543 | ret_code_t fds_descriptor_from_rec_id(fds_record_desc_t * const p_desc, |
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638:c90ae1400bf2 | 544 | fds_record_id_t record_id); |
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638:c90ae1400bf2 | 545 | |
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638:c90ae1400bf2 | 546 | /**@brief Function to obtain a record ID from a record descriptor. |
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638:c90ae1400bf2 | 547 | * |
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638:c90ae1400bf2 | 548 | * @details This function can be used to extract a record ID from a descriptor. It may be used |
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638:c90ae1400bf2 | 549 | * in the callback function to determine which record the callback is associated to, if |
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638:c90ae1400bf2 | 550 | * you have its descriptor. |
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638:c90ae1400bf2 | 551 | * |
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638:c90ae1400bf2 | 552 | * @warning This function does not check the record descriptor sanity. If the descriptor is |
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638:c90ae1400bf2 | 553 | * uninitialized, or has been tampered with, the resulting record ID may be invalid. |
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638:c90ae1400bf2 | 554 | * |
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638:c90ae1400bf2 | 555 | * @param[in] p_desc The descriptor from which to extract the record ID. |
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638:c90ae1400bf2 | 556 | * @param[out] p_record_id The record ID contained in the given descriptor. |
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638:c90ae1400bf2 | 557 | * |
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638:c90ae1400bf2 | 558 | * @retval NRF_SUCCESS Success. |
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638:c90ae1400bf2 | 559 | * @retval NRF_ERROR_NULL Error. Either p_desc is NULL or p_record_id is NULL. |
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638:c90ae1400bf2 | 560 | */ |
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638:c90ae1400bf2 | 561 | ret_code_t fds_record_id_from_desc(fds_record_desc_t const * const p_desc, |
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638:c90ae1400bf2 | 562 | fds_record_id_t * const p_record_id); |
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638:c90ae1400bf2 | 563 | |
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638:c90ae1400bf2 | 564 | /** @} */ |
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638:c90ae1400bf2 | 565 | |
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638:c90ae1400bf2 | 566 | #endif // FDS_H__ |