File Systems: FAT
Files
fs_file.*
fs_fat_file.*
Directories
fs_dir.*
fs_fat_file.*
Entries
fs_entry.*
fs_fat_entry.*
FAT
System
Driver
Core
fs_fat.*
Directory Entries
fs_fat_lfn.*
fs_fat_sfn.*
FAT Access
fs_fat_fat12.*
fs_fat_fat16.*
fs_fat_fat32.*
Volume
fs_vol.*
Figure 9-5 FAT system driver architecture
9-2 OPERATIONS
The application rarely needs to know about the underlying file system; the FAT system
driver within μC/FS handles file and volume accesses in a transparent manner. A few
specific cases, the application may benefit from increased awareness of FAT operation.
9-2-1 FORMATTING
A volume, once it is open, may need to be formatted before files or directories can be
created. The default format is selected by passing a NULL pointer as the second parameter
of FSVol_Fmt() . Alternatively, the exact properties of the file system can be configured
with a FS_FAT_SYS_CFG structure. An example of populating and using the FAT
configuration is shown in Listing 9-1. If the configuration is invalid, an error will be returned
from FSVol_Fmt() . For more information about the FS_FAT_SYS_CFG structure, see
Appendix D, “FS_FAT_SYS_CFG” on page 520.
115
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