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42 lines
2.0 KiB
ReStructuredText
42 lines
2.0 KiB
ReStructuredText
Partitions API
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==============
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:link_to_translation:`zh_CN:[中文]`
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Overview
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--------
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The ``esp_partition`` component has higher-level API functions which work with partitions defined in the :doc:`/api-guides/partition-tables`. These APIs are based on lower level API provided by :doc:`/api-reference/peripherals/spi_flash/index`.
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.. _flash-partition-apis:
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Partition Table API
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-------------------
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ESP-IDF projects use a partition table to maintain information about various regions of SPI flash memory (bootloader, various application binaries, data, filesystems). More information can be found in :doc:`/api-guides/partition-tables`.
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This component provides API functions to enumerate partitions found in the partition table and perform operations on them. These functions are declared in ``esp_partition.h``:
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- :cpp:func:`esp_partition_find` checks a partition table for entries with specific type, returns an opaque iterator.
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- :cpp:func:`esp_partition_get` returns a structure describing the partition for a given iterator.
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- :cpp:func:`esp_partition_next` shifts the iterator to the next found partition.
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- :cpp:func:`esp_partition_iterator_release` releases iterator returned by :cpp:func:`esp_partition_find`.
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- :cpp:func:`esp_partition_find_first` is a convenience function which returns the structure describing the first partition found by :cpp:func:`esp_partition_find`.
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- :cpp:func:`esp_partition_read`, :cpp:func:`esp_partition_write`, :cpp:func:`esp_partition_erase_range` are equivalent to :cpp:func:`esp_flash_read`, :cpp:func:`esp_flash_write`, :cpp:func:`esp_flash_erase_region`, but operate within partition boundaries.
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See Also
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--------
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- :doc:`../../api-guides/partition-tables`
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- :doc:`../system/ota` provides high-level API for updating applications stored in flash.
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- :doc:`nvs_flash` provides a structured API for storing small pieces of data in SPI flash.
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.. _api-reference-partition-table:
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API Reference - Partition Table
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-------------------------------
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.. include-build-file:: inc/esp_partition.inc
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