FSFile_Open()

FS_FILE  *FSFile_Open (CPU_CHAR  *name_full,

                       FS_FLAGS   mode

                       FS_ERR    *p_err);

Open a file.

See fs_fopen() for more information.

Arguments

name_full

Name of the file. See the sub-topic "µC/FS File and Directory Names and Paths" in the topic Useful Information.

mode

File access mode (see Notes #1 and #2).

p_err

Pointer to variable that will the receive return error code from this function:

FS_ERR_NONE

File opened.

FS_ERR_NAME_NULL

Argument name_full passed a NULL pointer.

Or entry error (see Device Error Codes).

Returned Value

None.

Notes/Warnings

• The access mode should be the logical OR of one or more flags :

FS_FILE_ACCESS_MODE_RD

File opened for reads.

FS_FILE_ACCESS_MODE_WR

File opened for writes.

FS_FILE_ACCESS_MODE_CREATE

File will be created, if necessary.

FS_FILE_ACCESS_MODE_TRUNC

File length will be truncated to 0.

FS_FILE_ACCESS_MODE_APPEND

All writes will be performed at EOF.

FS_FILE_ACCESS_MODE_EXCL

File will be opened if and only if it does not already exist.

FS_FILE_ACCESS_MODE_CACHED

File data will be cached.

• If FS_FILE_ACCESS_MODE_TRUNC is set, then FS_FILE_ACCESS_MODE_WR must also be set.
• If FS_FILE_ACCESS_MODE_EXCL is set, then FS_FILE_ACCESS_MODE_CREATE must also be set.
• FS_FILE_ACCESS_MODE_RD and/or FS_FILE_ACCESS_MODE_WR must be set.

• The mode string argument of fs_fopen() function can specify a subset of the possible valid modes for this function. The equivalent modes of fs_fopen() mode strings are shown in the table below.

  fopen() Mode String	mode Equivalent
  “r” or “rb”	FS_FILE_ACCESS_MODE_RD
  “w” or “wb”	FS_FILE_ACCESS_MODE_WR | FS_FILE_ACCESS_MODE_CREATE | FS_FILE_ACCESS_MODE_TRUNC
  “a” or “ab”	FS_FILE_ACCESS_MODE_WR | FS_FILE_ACCESS_MODE_CREATE | FS_FILE_ACCESS_MODE_APPEND
  “r+” or “rb+” or “r+b”	FS_FILE_ACCESS_MODE_RD | FS_FILE_ACCESS_MODE_WR
  “w+” or “wb+” or “w+b”	FS_FILE_ACCESS_MODE_RD | FS_FILE_ACCESS_MODE_WR | FS_FILE_ACCESS_MODE_CREATE | FS_FILE_ACCESS_MODE_TRUNC
  “a+” or “ab+” or “a+b”	FS_FILE_ACCESS_MODE_RD | FS_FILE_ACCESS_MODE_WR | FS_FILE_ACCESS_MODE_CREATE | FS_FILE_ACCESS_MODE_APPEND