diff --git a/components/dfs/filesystems/elmfat/ffconf.h b/components/dfs/filesystems/elmfat/ffconf.h
index ab0c2dae9fade7d89d8a01b491254e3906df4680..0965f8a411eb8b66a4008dc26d2158482bb74459 100644
--- a/components/dfs/filesystems/elmfat/ffconf.h
+++ b/components/dfs/filesystems/elmfat/ffconf.h
@@ -84,7 +84,11 @@
 / Locale and Namespace Configurations
 /---------------------------------------------------------------------------*/
 
-#define FF_CODE_PAGE	932
+#ifdef RT_DFS_ELM_CODE_PAGE
+#    define FF_CODE_PAGE	RT_DFS_ELM_CODE_PAGE
+#else
+#    define FF_CODE_PAGE	936
+#endif
 /* This option specifies the OEM code page to be used on the target system.
 /  Incorrect code page setting can cause a file open failure.
 /
@@ -113,8 +117,13 @@
 */
 
 
-#define FF_USE_LFN		0
-#define FF_MAX_LFN		255
+#if RT_DFS_ELM_USE_LFN
+#define FF_USE_LFN 	RT_DFS_ELM_USE_LFN
+#define FF_MAX_LFN 	RT_DFS_ELM_MAX_LFN
+#else
+#define FF_USE_LFN	0		/* 0 to 3 */
+#define FF_MAX_LFN	255		/* Maximum LFN length to handle (12 to 255) */
+#endif
 /* The FF_USE_LFN switches the support for LFN (long file name).
 /
 /   0: Disable LFN. FF_MAX_LFN has no effect.
@@ -133,7 +142,20 @@
 /  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */
 
 
-#define FF_LFN_UNICODE	0
+#ifdef RT_DFS_ELM_LFN_UNICODE
+/* This option switches the character encoding on the API when LFN is enabled.
+/
+/   0: ANSI/OEM in current CP (TCHAR = char)
+/   1: Unicode in UTF-16 (TCHAR = WCHAR)
+/   2: Unicode in UTF-8 (TCHAR = char)
+/   3: Unicode in UTF-32 (TCHAR = DWORD)
+/
+/  Also behavior of string I/O functions will be affected by this option.
+/  When LFN is not enabled, this option has no effect. */
+#define FF_LFN_UNICODE	RT_DFS_ELM_LFN_UNICODE	/* 0:ANSI/OEM or 1:Unicode */
+#else
+#define	FF_LFN_UNICODE	0	/* 0:ANSI/OEM or 1:Unicode */
+#endif
 /* This option switches the character encoding on the API when LFN is enabled.
 /
 /   0: ANSI/OEM in current CP (TCHAR = char)
@@ -166,7 +188,11 @@
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
 
-#define FF_VOLUMES		1
+#ifdef RT_DFS_ELM_DRIVES
+#define FF_VOLUMES RT_DFS_ELM_DRIVES
+#else
+#define FF_VOLUMES	1
+#endif
 /* Number of volumes (logical drives) to be used. (1-10) */