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37 lines
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ReStructuredText
37 lines
1.7 KiB
ReStructuredText
Storage API
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:link_to_translation:`zh_CN:[中文]`
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This section contains reference of the high-level storage APIs. They are based on low-level drivers such as SPI flash, SD/MMC.
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- :doc:`Partitions API <partition>` allow block based access to SPI flash according to the :doc:`/api-guides/partition-tables`.
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- :doc:`Non-Volatile Storage library (NVS) <nvs_flash>` implements a fault-tolerant wear-levelled key-value storage in SPI NOR flash.
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- :doc:`Virtual File System (VFS) <vfs>` library provides an interface for registration of file system drivers. SPIFFS, FAT and various other file system libraries are based on the VFS.
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- :doc:`SPIFFS <spiffs>` is a wear-levelled file system optimized for SPI NOR flash, well suited for small partition sizes and low throughput
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- :doc:`FAT <fatfs>` is a standard file system which can be used in SPI flash or on SD/MMC cards
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- :doc:`Wear Levelling <wear-levelling>` library implements a flash translation layer (FTL) suitable for SPI NOR flash. It is used as a container for FAT partitions in flash.
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.. note::
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It is suggested to use high-level APIs (``esp_partition`` or file system) instead of low-level driver APIs to access the SPI NOR flash.
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Due to the restriction of NOR flash and ESP hardware, accessing the main flash will affect the performance of the whole system. See :doc:`/api-reference/peripherals/spi_flash/index` to learn more about the limitations.
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.. toctree::
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:maxdepth: 1
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fatfs
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mass_mfg.rst
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nvs_flash
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nvs_encryption
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nvs_partition_gen.rst
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nvs_partition_parse.rst
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sdmmc
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partition
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spiffs
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vfs
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wear-levelling
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Code examples for this API section are provided in the :example:`storage` directory of ESP-IDF examples.
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