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f_open()

[FreeRTOS Embedded File System API]

header_file.h
F_FILE * f_open( const char *pcFileName, const char *pcMode );
		

Opens a file in the FAT file system ready for reading or writing.

Parameters:

pcFileName   The name of the file being opened. The name is specified as a standard null terminated C string.

pcMode   The mode in which the file will be opened. The following values are valid:

String
Description
"r" Open the file for reading.
"w" Open the file for writing.
"a" Open the file to append data to the end of the file.
"w+" Open the file for both reading and writing. The file will be truncated to zero length when it is opened.
"a+" Open the file for both appending data to the end of the file and for reading.
"r+" Open the file for both reading and writing.

There is no text mode. All files are treated as being binary.

Returns:
Null   The file could not be opened.

Any other value   The returned value is the handle to the opened file.

See also

f_read(), f_write(), f_close().

Example usage:


void vSampleFunction( void )
{
F_FILE *pxFile;
char c;

    /* Open a file called afile.bin. */
    pxFile = f_open( "afile.bin", "r" );
    if( pxFile != NULL )
    {
        /*
         * Access the file here using f_read().
         */

        /* Close the file when all accesses are complete. */
        f_close( pxFile );
    }
}
						
Example use of the f_open() API function


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