/**
* Initialize \a file and open \a file_path for reading.
+ * \param file A pointer to a FatFile structure.
+ * \param file_path The file path on the filesystem.
+ * \param mode Open mode for the file.
+ * \sa ff.h for return code meaning and \a mode flags.
*/
FRESULT fatfile_open(FatFile *file, const char *file_path, BYTE mode);