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docs: Update CN translation for fatfs.rst
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@ -150,6 +150,7 @@ Usage::
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Parameter --verbose prints detailed information from boot sector of the FatFs image to the terminal before folder structure is generated.
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FATFS Minimum Partition Size and Limits
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---------------------------------------
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@ -159,20 +160,20 @@ The FATFS component supports FAT12, FAT16, and FAT32 file system types. The file
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* For a partition with wear leveling enabled, 4 sectors will be reserved for wear-leveling operations, and 4 sectors will be used by the FATFS (1 reserved sector, 1 FAT sector, 1 root directory sector and 1 data sector).
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* Increasing the partition size will allocate additional data sectors, allowing for more storage space.
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* For partition sizes less than 528 KB, 1 root directory sector will be allocated; for larger partitions, 4 root directory sectors will be used.
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* By default, two FAT sectors are created, increasing the partition size by one sector to accommodate the extra FAT sector. To enable a single FAT sector, configure the `use_one_fat` option in `struct esp_vfs_fat_mount_config_t` (see/vfs/esp_vfs_fat.h). Enabling this option allows the minimum partition size to be reduced to 32 KB.
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* By default, two FAT sectors are created, increasing the partition size by one sector to accommodate the extra FAT sector. To enable a single FAT sector, configure the `use_one_fat` option in `struct esp_vfs_fat_mount_config_t` (see :component_file:`fatfs/vfs/esp_vfs_fat.h`). Enabling this option allows the minimum partition size to be reduced to 32 KB.
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* The general formula for calculating the partition size for a wear-leveled partition is::
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partition_size = Wear-levelling sectors * FLASH_SEC_SIZE + FATFS partition sectors * FAT_SEC_SIZE
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Where,
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- Wear-leveling sectors are fixed at 4,
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- FLASH_SEC_SIZE is 4096 bytes,
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- FATFS partition sectors include: 1 reserved sector + FAT sectors + root directory sectors + data sectors,
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- FAT_SEC_SIZE can be either 512 bytes or 4096 bytes, depending on the configuration.
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Where:
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- Wear-leveling sectors are fixed at 4
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- FLASH_SEC_SIZE is 4096 bytes
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- FATFS partition sectors include: 1 reserved sector + FAT sectors + root directory sectors + data sectors
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- FAT_SEC_SIZE can be either 512 bytes or 4096 bytes, depending on the configuration
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* For read-only partitions without wear leveling enabled and a sector size of 512 bytes, the minimum partition size can be reduced to as low as 2 KB.
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Please refer :doc:`File System Considerations <../../api-guides/file-system-considerations>` for further details .
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High-level API Reference
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------------------------
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@ -94,7 +94,7 @@ FatFs 分区生成器
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该生成器可以在主机上创建文件系统镜像,并用指定的主机文件夹内容对其进行填充。
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该脚本是建立在分区生成器的基础上 (:component_file:`fatfsgen.py<fatfs/fatfsgen.py>`),目前除了可以生成分区外,也可以初始化磨损均衡。
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该脚本是建立在分区生成器的基础上 (:component_file:`fatfsgen.py<fatfs/fatfsgen.py>`),目前除了可以生成分区外,也可以初始化损耗均衡。
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目前的最新版本支持短文件名、长文件名、FAT12 和 FAT16。长文件名的上限是 255 个字符,文件名中可以包含多个 ``.`` 字符以及其他字符,如 ``+``、``,``、``;``、``=``、``[`` and ``]`` 等。
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@ -107,13 +107,13 @@ FatFs 分区生成器
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fatfs_create_spiflash_image(<partition> <base_dir> [FLASH_IN_PROJECT])
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如果不希望在生成分区时使用磨损均衡,可以使用 ``fatfs_create_rawflash_image``::
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如果不希望在生成分区时使用损耗均衡,可以使用 ``fatfs_create_rawflash_image``::
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fatfs_create_rawflash_image(<partition> <base_dir> [FLASH_IN_PROJECT])
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``fatfs_create_spiflash_image`` 以及 ``fatfs_create_rawflash_image`` 必须从项目的 CMakeLists.txt 中调用。
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如果决定使用 ``fatfs_create_rawflash_image`` (不支持磨损均衡),请注意它仅支持在设备中以只读模式安装。
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如果决定使用 ``fatfs_create_rawflash_image`` (不支持损耗均衡),请注意它仅支持在设备中以只读模式安装。
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该函数的参数如下:
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@ -150,6 +150,31 @@ FatFs 分区分析器
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生成文件夹结构之前,参数 --verbose 将根据 FatFs 镜像的引导扇区在终端打印详细信息。
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FATFS 最小分区大小及限制
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------------------------
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FATFS 组件支持 FAT12、FAT16 和 FAT32 文件系统类型。文件系统类型取决于卷上簇的数量(簇数通过数据扇区数量除以每簇包含的扇区数计算得出)。最小分区大小由分配给 FAT 表、根目录和数据簇的扇区数量决定。
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* 对于 4096 字节的扇区,启用损耗均衡的 FAT 分区大小最小支持 32 KB。对于 512 字节的扇区,最小分区大小取决于损耗均衡的配置:性能模式下,最小支持 20 KB,安全模式下最小支持 28 KB(需要额外的 2 个扇区)。
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* 启用了损耗均衡的分区会预留 4 个扇区用于损耗均衡操作。此外,FATFS 本身也会使用 4 个扇区,分别为 1 个保留扇区、1 个 FAT 扇区、1 个根目录扇区和 1 个数据扇区。
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* 增加分区大小将分配更多的数据扇区,提供更大的存储空间。
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* 对小于 528 KB 的分区,将分配 1 个根目录扇区;对于更大的分区,将分配 4 个根目录扇区。
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* 默认会创建两个 FAT 扇区,因此分区大小会增加一个扇区来容纳这个额外的 FAT 扇区。如要启用单个 FAT 扇区,可以在 `struct esp_vfs_fat_mount_config_t` 中(参见 :component_file:`fatfs/vfs/esp_vfs_fat.h`)设置 `use_one_fat` 选项。启用此选项后,最小分区大小可减少至 32 KB。
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* 计算损耗均衡分区大小的一般公式为::
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partition_size = 损耗均衡扇区数 * FLASH_SEC_SIZE + FATFS 分区扇区数量 * FAT_SEC_SIZE
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其中:
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- 损耗均衡扇区数固定为 4 个
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- FLASH_SEC_SIZE 为 4096 字节
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- FATFS 分区扇区包括:1 个保留扇区 + FAT 扇区 + 根目录扇区 + 数据扇区
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- FAT_SEC_SIZE 根据不同的配置,可以是 512 字节或 4096 字节
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* 对于未启用损耗均衡、扇区大小为 512 字节的只读分区,最小分区大小可减少至 2 KB。
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高级 API 参考
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------------------------
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