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DMCP interface: FatFs file functions

FatFs file functions. More...

struct   FIL   FatFs file structure used in file operations. More...
  #define  f_size(fp)   File size.
  #define  f_tell(fp)   File position.
  #define  f_eof(fp)   File EOF indicator.
  #define  EOF   (-1)   EOF character definition.
  enum   FRESULT {
  FR_OK = 0 , FR_DISK_ERR , FR_INT_ERR , FR_NOT_READY ,
  FR_NO_FILE , FR_NO_PATH , FR_INVALID_NAME , FR_DENIED ,
  FR_EXIST , FR_INVALID_OBJECT , FR_WRITE_PROTECTED , FR_INVALID_DRIVE ,
  FR_NOT_ENABLED , FR_NO_FILESYSTEM , FR_MKFS_ABORTED , FR_TIMEOUT ,
  FR_LOCKED , FR_NOT_ENOUGH_CORE , FR_TOO_MANY_OPEN_FILES , FR_INVALID_PARAMETER
}   File function return code (FRESULT) More...
  FRESULT  f_open (FIL *fp, const TCHAR *path, BYTE mode)   Open or create a file.
  FRESULT  f_close (FIL *fp)   Close an open file object.
  FRESULT  f_read (FIL *fp, void *buff, UINT btr, UINT *br)   Read data from the file.
  FRESULT  f_write (FIL *fp, const void *buff, UINT btw, UINT *bw)   Write data to the file.
  FRESULT  f_lseek (FIL *fp, FSIZE_t ofs)   Move file pointer of the file object.
  FRESULT  f_rename (const TCHAR *path_old, const TCHAR *path_new)   Rename/Move a file or directory.
  FRESULT  f_unlink (const TCHAR *path)   Delete an existing file or directory.
 

FatFs file functions.

Used FatFS version R0.12c - for doc see (http://elm-chan.org/fsw/ff/00index_e.html).

Note that only functions mentioned here are supported.

◆ f_eof Value:

((int)((fp)->fptr == (fp)->obj.objsize))

File EOF indicator.

◆ f_size ◆ f_tell ◆ FRESULT

File function return code (FRESULT)

Enumerator FR_OK 

(0) Succeeded

FR_DISK_ERR 

(1) A hard error occurred in the low level disk I/O layer

FR_INT_ERR 

(2) Assertion failed

FR_NOT_READY 

(3) The physical drive cannot work

FR_NO_FILE 

(4) Could not find the file

FR_NO_PATH 

(5) Could not find the path

FR_INVALID_NAME 

(6) The path name format is invalid

FR_DENIED 

(7) Access denied due to prohibited access or directory full

FR_EXIST 

(8) Access denied due to prohibited access

FR_INVALID_OBJECT 

(9) The file/directory object is invalid

FR_WRITE_PROTECTED 

(10) The physical drive is write protected

FR_INVALID_DRIVE 

(11) The logical drive number is invalid

FR_NOT_ENABLED 

(12) The volume has no work area

FR_NO_FILESYSTEM 

(13) There is no valid FAT volume

FR_MKFS_ABORTED 

(14) The f_mkfs() aborted due to any problem

FR_TIMEOUT 

(15) Could not get a grant to access the volume within defined period

FR_LOCKED 

(16) The operation is rejected according to the file sharing policy

FR_NOT_ENOUGH_CORE 

(17) LFN working buffer could not be allocated

FR_TOO_MANY_OPEN_FILES 

(18) Number of open files > _FS_LOCK

FR_INVALID_PARAMETER 

(19) Given parameter is invalid

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