FatFs Integration

Overview

Use this skill to integrate FatFs by proving the disk I/O layer before trusting filesystem behavior. FatFs is portable C, but the target-specific diskio functions, sector geometry, mount policy, and media timing decide whether it works reliably.

When To Use

Use this skill when:

• The user wants to add or debug FatFs on SD card, eMMC, USB MSC, RAM disk, SPI flash, or block devices.
• The issue involves f_mount, f_open, f_read, f_write, FR_DISK_ERR, FR_NOT_READY, FR_NO_FILESYSTEM, long filenames, Unicode, or exFAT.
• The project uses ff.c, ffconf.h, diskio.c, or FATFS.

Do not use this skill when the raw block device cannot read/write sectors yet; debug the storage driver first.

First Questions

Ask for: