tamildaa.blogg.se - Failed to mount sdcard invalid argument

If you need to use long filenames (LFN), enable the CONFIG_FATFS_LONG_FILENAMES option. The filesystem uses 8.3 filenames format (SFN) by default.

Use paths starting with the path prefix passed to esp_vfs_register() (for example, "/sdcard/hello.txt"). For more information, see FatFs documentation.Ĭall the C standard library and POSIX API functions to perform such actions on files as open, read, write, erase, copy, etc. Path prefix where to mount the filesystem (e.g., "/sdcard", "/spiflash")Ī variable which will receive the pointer to the FATFS structureĬall ff_diskio_register() to register the disk I/O driver for the drive number used in Step 1.Ĭall the FatFs function f_mount, and optionally f_fdisk, f_mkfs, to mount the filesystem using the same drive number which was passed to esp_vfs_fat_register().

Call esp_vfs_fat_register() to specify:.

Most applications use the following workflow when working with esp_vfs_fat_ functions: The function esp_vfs_fat_unregister_path() deletes the registration with VFS, and frees the FATFS structure. Subsequent operations on files starting with this prefix are forwarded to FatFs APIs. The function esp_vfs_fat_register() allocates a FATFS structure and registers a given path prefix in VFS. The header file fatfs/vfs/esp_vfs_fat.h defines the functions for connecting FatFs and VFS.

This allows mapping of FatFs drives to physical disks at runtime. Although the library can be used directly, many of its features can be accessed via VFS using the C standard library and POSIX API functions.Īdditionally, FatFs has been modified to support the runtime pluggable disk I/O layer. ESP-IDF uses the FatFs library to work with FAT filesystems.