diff --git a/bsp/lm3s/application.c b/bsp/lm3s/application.c
index 508ff154ac308ac6607d8504125a858cdcbb1e1c..b697141116d07522e01e49a0123bf98ceb6c3990 100644
--- a/bsp/lm3s/application.c
+++ b/bsp/lm3s/application.c
@@ -23,10 +23,8 @@
 #ifdef RT_USING_DFS
 /* dfs init */
 #include <dfs_init.h>
-/* dfs filesystem:FAT filesystem init */
-#include <dfs_fat.h>
-/* dfs filesystem:EFS filesystem init */
-#include <dfs_efs.h>
+/* dfs filesystem:ELM FatFs filesystem init */
+#include <dfs_elm.h>
 /* dfs Filesystem APIs */
 #include <dfs_fs.h>
 #endif
@@ -44,14 +42,18 @@ void rt_init_thread_entry(void *parameter)
 	{
 		/* init the device filesystem */
 		dfs_init();
-		/* init the efsl filesystam*/
-		efsl_init();
+#ifdef RT_USING_DFS_ELMFAT
+		/* init the elm chan FatFs filesystam*/
+		elm_init();
 
 		/* mount sd card fat partition 1 as root directory */
-		if (dfs_mount("sd0", "/", "efs", 0, 0) == 0)
+		if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
+		{
 			rt_kprintf("File System initialized!\n");
+		}
 		else
-			rt_kprintf("File System init failed!\n");
+			rt_kprintf("File System initialzation failed!\n");
+#endif
 	}
 #endif
 
diff --git a/bsp/lm3s/board.c b/bsp/lm3s/board.c
index 0a64a2f120fe05b3e2b07010f74ed5a54c1f5bcc..56fa83f89b6b49aa5c904c177cf43345ea246b67 100644
--- a/bsp/lm3s/board.c
+++ b/bsp/lm3s/board.c
@@ -14,6 +14,7 @@
 
 #include <rthw.h>
 #include <rtthread.h>
+#include <board.h>
 
 #include <inc/hw_types.h>
 #include <inc/hw_memmap.h>
@@ -24,6 +25,7 @@
 #include <driverlib/systick.h>
 #include <driverlib/interrupt.h>
 
+
 static void rt_hw_console_init(void);
 
 /**
@@ -71,7 +73,7 @@ void rt_hw_board_init()
 	SysCtlLDOSet(SYSCTL_LDO_2_50V);
 	/* set clock */
 	SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
-                   SYSCTL_XTAL_6MHZ);
+                   LM3S_XTAL_TYPE);
 
 	/* init systick */
 	SysTickDisable();
diff --git a/bsp/lm3s/board.h b/bsp/lm3s/board.h
index f386ea3cfda33b6c7e1f48b5eec4774d37321afe..33d328546551dc6b70f783ef1f17aae95b010aa0 100644
--- a/bsp/lm3s/board.h
+++ b/bsp/lm3s/board.h
@@ -22,10 +22,14 @@
 #define LM3S_SRAM_SIZE         64
 #define LM3S_SRAM_END          (0x20000000 + LM3S_SRAM_SIZE * 1024)
 
+// For lm3s8962, it should be SYSCTL_XTAL_8MHZ
+#define LM3S_XTAL_TYPE      	SYSCTL_XTAL_6MHZ
+
 void rt_hw_board_led_on(int n);
 void rt_hw_board_led_off(int n);
 void rt_hw_board_init(void);
 
 void rt_hw_usart_init(void);
+void rt_hw_sdcard_init(void);
 
 #endif
diff --git a/bsp/lm3s/lm3s_rom.ld b/bsp/lm3s/lm3s_rom.ld
index b4e1f34ebd74e0146b29ca57ab3df555d91aad00..e2b965b74f1d56c6180da45958912a5175893ede 100644
--- a/bsp/lm3s/lm3s_rom.ld
+++ b/bsp/lm3s/lm3s_rom.ld
@@ -9,7 +9,7 @@ MEMORY
 	CODE (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
 	DATA (rw) : ORIGIN = 0x20000000, LENGTH = 0x00010000
 }
-ENTRY(ResetISR)
+ENTRY(Reset_Handler)
 
 SECTIONS
 {
diff --git a/bsp/lm3s/project_lwip_dfs.Opt b/bsp/lm3s/project_lwip_dfs.Opt
index 66caf10fab8edba39c3dec3ed3a16aea00543017..66d75c120554c84f214e1a7f8d23941bab772fa6 100644
--- a/bsp/lm3s/project_lwip_dfs.Opt
+++ b/bsp/lm3s/project_lwip_dfs.Opt
@@ -11,24 +11,24 @@
  DaveTm { 0,0,0,0,0,0,0,0 }
 
 Target (RT-Thread-LM3S), 0x0004 // Tools: 'ARM-ADS'
-GRPOPT 1,(Startup),1,0,0
+GRPOPT 1,(Startup),0,0,0
 GRPOPT 2,(Kernel),0,0,0
 GRPOPT 3,(finsh),0,0,0
 GRPOPT 4,(LM3S),0,0,0
-GRPOPT 5,(driverlib),1,0,0
+GRPOPT 5,(driverlib),0,0,0
 GRPOPT 6,(Filesystem),0,0,0
 GRPOPT 7,(LwIP),0,0,0
 
-OPTFFF 1,1,1,0,0,1,1,0,<.\application.c><application.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,236,2,0,0,123,1,0,0 }
-OPTFFF 1,2,1,486539264,0,63,63,0,<.\board.c><board.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,183,2,0,0,100,1,0,0 }
+OPTFFF 1,1,1,570425344,0,25,34,0,<.\application.c><application.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,236,2,0,0,123,1,0,0 }
+OPTFFF 1,2,1,0,0,63,74,0,<.\board.c><board.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,183,2,0,0,100,1,0,0 }
 OPTFFF 1,3,1,0,0,130,135,0,<.\startup.c><startup.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,22,0,0,0,29,0,0,0,161,2,0,0,71,1,0,0 }
 OPTFFF 1,4,5,134217728,0,84,84,0,<.\rtconfig.h><rtconfig.h> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
-OPTFFF 1,5,1,922746880,0,0,0,0,<.\sdcard.c><sdcard.c> 
+OPTFFF 1,5,1,0,0,89,95,0,<.\sdcard.c><sdcard.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,22,0,0,0,29,0,0,0,183,2,0,0,9,1,0,0 }
 OPTFFF 1,6,1,1006632960,0,1,1,0,<.\luminaryif.c><luminaryif.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
-OPTFFF 1,7,5,0,0,0,0,0,<.\board.h><board.h> 
+OPTFFF 1,7,5,0,0,16,20,0,<.\board.h><board.h> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,110,0,0,0,145,0,0,0,227,2,0,0,188,1,0,0 }
 OPTFFF 2,8,1,0,0,0,0,0,<..\..\src\clock.c><clock.c> 
 OPTFFF 2,9,1,0,0,0,0,0,<..\..\src\device.c><device.c> 
-OPTFFF 2,10,1,0,0,51,60,0,<..\..\src\idle.c><idle.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
+OPTFFF 2,10,1,687865858,0,51,58,0,<..\..\src\idle.c><idle.c> { 44,0,0,0,2,0,0,0,3,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
 OPTFFF 2,11,1,0,0,0,0,0,<..\..\src\ipc.c><ipc.c> 
 OPTFFF 2,12,1,0,0,0,0,0,<..\..\src\irq.c><irq.c> 
 OPTFFF 2,13,1,0,0,0,0,0,<..\..\src\mem.c><mem.c> 
@@ -61,68 +61,59 @@ OPTFFF 4,39,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\serial.c><serial.c>
 OPTFFF 4,40,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault.c><fault.c> 
 OPTFFF 4,41,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault_rvds.S><fault_rvds.S> 
 OPTFFF 5,42,4,0,0,0,0,0,<..\..\bsp\lm3s\Libraries\driverlib\rvmdk\driverlib.lib><driverlib.lib> 
-OPTFFF 6,43,1,1,0,0,0,0,<..\..\filesystem\dfs\src\dfs_init.c><dfs_init.c> 
+OPTFFF 6,43,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_init.c><dfs_init.c> 
 OPTFFF 6,44,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_fs.c><dfs_fs.c> 
 OPTFFF 6,45,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_raw.c><dfs_raw.c> 
 OPTFFF 6,46,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_util.c><dfs_util.c> 
-OPTFFF 6,47,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_cache.c><dfs_cache.c> 
-OPTFFF 6,48,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_posix.c><dfs_posix.c> 
-OPTFFF 6,49,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\efs.c><efs.c> 
-OPTFFF 6,50,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\extract.c><extract.c> 
-OPTFFF 6,51,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\partition.c><partition.c> 
-OPTFFF 6,52,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\plibc.c><plibc.c> 
-OPTFFF 6,53,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\dir.c><dir.c> 
-OPTFFF 6,54,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fat.c><fat.c> 
-OPTFFF 6,55,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\file.c><file.c> 
-OPTFFF 6,56,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fs.c><fs.c> 
-OPTFFF 6,57,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ls.c><ls.c> 
-OPTFFF 6,58,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\time.c><time.c> 
-OPTFFF 6,59,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ui.c><ui.c> 
-OPTFFF 7,60,1,0,0,0,0,0,<..\..\net\lwip\src\core\dhcp.c><dhcp.c> 
-OPTFFF 7,61,1,0,0,0,0,0,<..\..\net\lwip\src\core\dns.c><dns.c> 
-OPTFFF 7,62,1,0,0,247,247,0,<..\..\net\lwip\src\core\init.c><init.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
-OPTFFF 7,63,1,0,0,0,0,0,<..\..\net\lwip\src\core\netif.c><netif.c> 
-OPTFFF 7,64,1,0,0,0,0,0,<..\..\net\lwip\src\core\pbuf.c><pbuf.c> 
-OPTFFF 7,65,1,0,0,0,0,0,<..\..\net\lwip\src\core\raw.c><raw.c> 
-OPTFFF 7,66,1,0,0,0,0,0,<..\..\net\lwip\src\core\stats.c><stats.c> 
-OPTFFF 7,67,1,0,0,0,0,0,<..\..\net\lwip\src\core\sys.c><sys.c> 
-OPTFFF 7,68,1,0,0,381,381,0,<..\..\net\lwip\src\core\tcp.c><tcp.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,227,2,0,0,158,1,0,0 }
-OPTFFF 7,69,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_in.c><tcp_in.c> 
-OPTFFF 7,70,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_out.c><tcp_out.c> 
-OPTFFF 7,71,1,0,0,0,0,0,<..\..\net\lwip\src\core\udp.c><udp.c> 
-OPTFFF 7,72,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\autoip.c><autoip.c> 
-OPTFFF 7,73,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\icmp.c><icmp.c> 
-OPTFFF 7,74,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\igmp.c><igmp.c> 
-OPTFFF 7,75,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet.c><inet.c> 
-OPTFFF 7,76,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet_chksum.c><inet_chksum.c> 
-OPTFFF 7,77,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip.c><ip.c> 
-OPTFFF 7,78,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_addr.c><ip_addr.c> 
-OPTFFF 7,79,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_frag.c><ip_frag.c> 
-OPTFFF 7,80,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_in.c><msg_in.c> 
-OPTFFF 7,81,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_out.c><msg_out.c> 
-OPTFFF 7,82,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_lib.c><api_lib.c> 
-OPTFFF 7,83,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_msg.c><api_msg.c> 
-OPTFFF 7,84,1,0,0,0,0,0,<..\..\net\lwip\src\api\err.c><err.c> 
-OPTFFF 7,85,1,0,0,0,0,0,<..\..\net\lwip\src\api\netbuf.c><netbuf.c> 
-OPTFFF 7,86,1,0,0,0,0,0,<..\..\net\lwip\src\api\netdb.c><netdb.c> 
-OPTFFF 7,87,1,0,0,0,0,0,<..\..\net\lwip\src\api\netifapi.c><netifapi.c> 
-OPTFFF 7,88,1,0,0,0,0,0,<..\..\net\lwip\src\api\tcpip.c><tcpip.c> 
-OPTFFF 7,89,1,0,0,0,0,0,<..\..\net\lwip\src\netif\etharp.c><etharp.c> 
-OPTFFF 7,90,1,0,0,0,0,0,<..\..\net\lwip\src\netif\ethernetif.c><ethernetif.c> 
-OPTFFF 7,91,1,0,0,0,0,0,<..\..\net\lwip\src\netif\loopif.c><loopif.c> 
-OPTFFF 7,92,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch_init.c><sys_arch_init.c> 
-OPTFFF 7,93,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch.c><sys_arch.c> 
-OPTFFF 7,94,1,0,0,0,0,0,<..\..\net\lwip\src\api\sockets.c><sockets.c> 
-OPTFFF 7,95,1,503316480,0,350,359,0,<..\..\net\lwip\src\core\memp.c><memp.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,205,2,0,0,47,1,0,0 }
-OPTFFF 7,96,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\asn1_dec.c><asn1_dec.c> 
-OPTFFF 7,97,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\asn1_enc.c><asn1_enc.c> 
-OPTFFF 7,98,1,838860802,0,4104,4104,0,<..\..\net\lwip\src\core\snmp\mib2.c><mib2.c> { 44,0,0,0,2,0,0,0,3,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,183,2,0,0,172,0,0,0 }
-OPTFFF 7,99,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\mib_structs.c><mib_structs.c> 
+OPTFFF 6,47,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_posix.c><dfs_posix.c> 
+OPTFFF 6,48,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\elmfat\ff.c><ff.c> 
+OPTFFF 6,49,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\elmfat\dfs_elm.c><dfs_elm.c> 
+OPTFFF 7,50,1,0,0,0,0,0,<..\..\net\lwip\src\core\dhcp.c><dhcp.c> 
+OPTFFF 7,51,1,0,0,0,0,0,<..\..\net\lwip\src\core\dns.c><dns.c> 
+OPTFFF 7,52,1,0,0,247,247,0,<..\..\net\lwip\src\core\init.c><init.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
+OPTFFF 7,53,1,0,0,0,0,0,<..\..\net\lwip\src\core\netif.c><netif.c> 
+OPTFFF 7,54,1,0,0,0,0,0,<..\..\net\lwip\src\core\pbuf.c><pbuf.c> 
+OPTFFF 7,55,1,0,0,0,0,0,<..\..\net\lwip\src\core\raw.c><raw.c> 
+OPTFFF 7,56,1,0,0,0,0,0,<..\..\net\lwip\src\core\stats.c><stats.c> 
+OPTFFF 7,57,1,0,0,0,0,0,<..\..\net\lwip\src\core\sys.c><sys.c> 
+OPTFFF 7,58,1,0,0,381,381,0,<..\..\net\lwip\src\core\tcp.c><tcp.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,227,2,0,0,158,1,0,0 }
+OPTFFF 7,59,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_in.c><tcp_in.c> 
+OPTFFF 7,60,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_out.c><tcp_out.c> 
+OPTFFF 7,61,1,0,0,0,0,0,<..\..\net\lwip\src\core\udp.c><udp.c> 
+OPTFFF 7,62,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\autoip.c><autoip.c> 
+OPTFFF 7,63,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\icmp.c><icmp.c> 
+OPTFFF 7,64,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\igmp.c><igmp.c> 
+OPTFFF 7,65,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet.c><inet.c> 
+OPTFFF 7,66,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet_chksum.c><inet_chksum.c> 
+OPTFFF 7,67,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip.c><ip.c> 
+OPTFFF 7,68,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_addr.c><ip_addr.c> 
+OPTFFF 7,69,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_frag.c><ip_frag.c> 
+OPTFFF 7,70,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_in.c><msg_in.c> 
+OPTFFF 7,71,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_out.c><msg_out.c> 
+OPTFFF 7,72,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_lib.c><api_lib.c> 
+OPTFFF 7,73,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_msg.c><api_msg.c> 
+OPTFFF 7,74,1,0,0,0,0,0,<..\..\net\lwip\src\api\err.c><err.c> 
+OPTFFF 7,75,1,0,0,0,0,0,<..\..\net\lwip\src\api\netbuf.c><netbuf.c> 
+OPTFFF 7,76,1,0,0,0,0,0,<..\..\net\lwip\src\api\netdb.c><netdb.c> 
+OPTFFF 7,77,1,0,0,0,0,0,<..\..\net\lwip\src\api\netifapi.c><netifapi.c> 
+OPTFFF 7,78,1,0,0,0,0,0,<..\..\net\lwip\src\api\tcpip.c><tcpip.c> 
+OPTFFF 7,79,1,0,0,0,0,0,<..\..\net\lwip\src\netif\etharp.c><etharp.c> 
+OPTFFF 7,80,1,0,0,0,0,0,<..\..\net\lwip\src\netif\ethernetif.c><ethernetif.c> 
+OPTFFF 7,81,1,0,0,0,0,0,<..\..\net\lwip\src\netif\loopif.c><loopif.c> 
+OPTFFF 7,82,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch_init.c><sys_arch_init.c> 
+OPTFFF 7,83,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch.c><sys_arch.c> 
+OPTFFF 7,84,1,0,0,0,0,0,<..\..\net\lwip\src\api\sockets.c><sockets.c> 
+OPTFFF 7,85,1,503316480,0,350,359,0,<..\..\net\lwip\src\core\memp.c><memp.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,205,2,0,0,47,1,0,0 }
+OPTFFF 7,86,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\asn1_dec.c><asn1_dec.c> 
+OPTFFF 7,87,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\asn1_enc.c><asn1_enc.c> 
+OPTFFF 7,88,1,285212672,0,4104,4104,0,<..\..\net\lwip\src\core\snmp\mib2.c><mib2.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,183,2,0,0,172,0,0,0 }
+OPTFFF 7,89,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\mib_structs.c><mib_structs.c> 
 
+ExtF <E:\SVN-Google-Source\src\kservice.h> 27,27,0,{ 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,205,2,0,0,159,1,0,0 }
 
 TARGOPT 1, (RT-Thread-LM3S)
  ADSCLK=6000000
-  OPTTT 0,1,1,0
+  OPTTT 1,1,1,0
   OPTHX 1,65535,0,0,0
   OPTLX 79,66,8,<.\>
   OPTOX 16
@@ -132,7 +123,11 @@ TARGOPT 1, (RT-Thread-LM3S)
   OPTAX 0
   OPTDL (SARMCM3.DLL)()(DLM.DLL)(-pLM3S6918)(SARMCM3.DLL)()(TLM.DLL)(-pLM3S6918)
   OPTDBG 49150,7,()()()()()()()()()() (Segger\JL2CM3.dll)()()()
-  OPTDF 0x0
+  OPTKEY 0,(DLGTARM)((1010=-1,-1,-1,-1,0)(1007=-1,-1,-1,-1,0)(1008=-1,-1,-1,-1,0)(1009=-1,-1,-1,-1,0)(110=-1,-1,-1,-1,0)(100=-1,-1,-1,-1,0)(101=-1,-1,-1,-1,0)(102=-1,-1,-1,-1,0)(103=-1,-1,-1,-1,0)(104=-1,-1,-1,-1,0)(105=-1,-1,-1,-1,0)(106=-1,-1,-1,-1,0)(161=-1,-1,-1,-1,0)(162=-1,-1,-1,-1,0)(163=-1,-1,-1,-1,0)(164=-1,-1,-1,-1,0)(150=-1,-1,-1,-1,0)(151=-1,-1,-1,-1,0)(152=-1,-1,-1,-1,0)(1011=-1,-1,-1,-1,0)(1012=-1,-1,-1,-1,0)(1014=-1,-1,-1,-1,0)(1016=-1,-1,-1,-1,0)(136=-1,-1,-1,-1,0))
+  OPTKEY 0,(ARMDBGFLAGS)()
+  OPTKEY 0,(DLGUARM)((105=-1,-1,-1,-1,0)(106=-1,-1,-1,-1,0)(107=-1,-1,-1,-1,0))
+  OPTKEY 0,(JL2CM3)(-U -O14 -S0 -C-1 -JU1 -JI127.0.0.1 -JP0 -TO18 -TC10000000 -TP21 -TDS8007 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -TB1 -TRE0 -FO7 -FD20000000 -FC800 -FN1 -FF0LM3S_256 -FS00 -FL040000)
+  OPTDF 0x80
   OPTLE <>
   OPTLC <>
 EndOpt
diff --git a/bsp/lm3s/project_lwip_dfs.Uv2 b/bsp/lm3s/project_lwip_dfs.Uv2
index 5a659941c9d916ebeaad78289c6f7b9245993199..03f310d45d2eb00ae9083a6a3299af1220536158 100644
--- a/bsp/lm3s/project_lwip_dfs.Uv2
+++ b/bsp/lm3s/project_lwip_dfs.Uv2
@@ -57,19 +57,9 @@ File 6,1,<..\..\filesystem\dfs\src\dfs_init.c><dfs_init.c>
 File 6,1,<..\..\filesystem\dfs\src\dfs_fs.c><dfs_fs.c>
 File 6,1,<..\..\filesystem\dfs\src\dfs_raw.c><dfs_raw.c>
 File 6,1,<..\..\filesystem\dfs\src\dfs_util.c><dfs_util.c>
-File 6,1,<..\..\filesystem\dfs\src\dfs_cache.c><dfs_cache.c>
 File 6,1,<..\..\filesystem\dfs\src\dfs_posix.c><dfs_posix.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\base\efs.c><efs.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\base\extract.c><extract.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\base\partition.c><partition.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\base\plibc.c><plibc.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\dir.c><dir.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fat.c><fat.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\file.c><file.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fs.c><fs.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ls.c><ls.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\time.c><time.c>
-File 6,1,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ui.c><ui.c>
+File 6,1,<..\..\filesystem\dfs\filesystems\elmfat\ff.c><ff.c>
+File 6,1,<..\..\filesystem\dfs\filesystems\elmfat\dfs_elm.c><dfs_elm.c>
 File 7,1,<..\..\net\lwip\src\core\dhcp.c><dhcp.c>
 File 7,1,<..\..\net\lwip\src\core\dns.c><dns.c>
 File 7,1,<..\..\net\lwip\src\core\init.c><init.c>
diff --git a/bsp/lm3s/rtconfig.h b/bsp/lm3s/rtconfig.h
index 0c343dc91aa172a132af5faaa73f4b8b1ee9a325..2f0c86e9c2930008517540f68fdcf7c8d91136b9 100644
--- a/bsp/lm3s/rtconfig.h
+++ b/bsp/lm3s/rtconfig.h
@@ -83,6 +83,9 @@
 
 #define RT_USING_DFS
 /* SECTION: DFS options */
+#define RT_USING_DFS_ELMFAT
+#define RT_DFS_ELM_WORD_ACCESS
+
 /* the max number of mounted filesystem */
 #define DFS_FILESYSTEMS_MAX		1
 /* the max number of opened files 		*/
@@ -95,8 +98,8 @@
 #define RT_USING_LWIP
 
 /* Trace LwIP protocol*/
-/* #define RT_LWIP_DEBUG */
-
+/* #define RT_LWIP_DEBUG */
+
 #define RT_LWIP_USING_RT_MEM
 
 /* Enable ICMP protocol*/
diff --git a/bsp/lm3s/rtconfig.py b/bsp/lm3s/rtconfig.py
index 83bec409da9606a85606805a28f1ae218003d73d..9eadd3e40300f0c1761ad7b0511a16829e6dbb99 100644
--- a/bsp/lm3s/rtconfig.py
+++ b/bsp/lm3s/rtconfig.py
@@ -1,18 +1,47 @@
+import SCons.cpp
+
 # component options
-# finsh shell option
-RT_USING_FINSH = True
 
-# device file system options
-RT_USING_DFS = True
-RT_USING_DFS_EFSL = True
-RT_USING_DFS_ELMFAT = False
-RT_USING_DFS_YAFFS2 = False
+# make all component false 
+RT_USING_DFS 		= False
+RT_USING_FINSH 		= False
+RT_USING_DFS_ELMFAT= False
+RT_USING_DFS_YAFFS2= False
+RT_USING_LWIP 		= False
+RT_USING_RTGUI 		= False
+
+# parse rtconfig.h to get used component
+PreProcessor = SCons.cpp.PreProcessor()
+f = file('rtconfig.h', 'r')
+contents = f.read()
+f.close()
+PreProcessor.process_contents(contents)
+rtconfig_ns = PreProcessor.cpp_namespace
+
+# finsh shell options
+if rtconfig_ns.has_key('RT_USING_FINSH'):
+	RT_USING_FINSH = True
+
+# device virtual filesystem options 
+if rtconfig_ns.has_key('RT_USING_DFS'):
+    RT_USING_DFS = True
+    
+    if rtconfig_ns.has_key('RT_USING_DFS_EFSL'):
+        RT_USING_DFS_EFSL = True
+    if rtconfig_ns.has_key('RT_USING_DFS_ELMFAT'):
+        RT_USING_DFS_ELMFAT = True
+    if rtconfig_ns.has_key('RT_USING_DFS_YAFFS2'):
+        RT_USING_DFS_YAFFS2 = True
 
 # lwip options
-RT_USING_LWIP = True
+if rtconfig_ns.has_key('RT_USING_LWIP'):
+    RT_USING_LWIP = True
+    if rtconfig_ns.has_key('RT_USING_WEBSERVER'):
+        RT_USING_WEBSERVER = True
 
 # rtgui options
-RT_USING_RTGUI = False
+if rtconfig_ns.has_key('RT_USING_RTGUI'):
+    RT_USING_RTGUI = True
 
 # toolchains options
 ARCH='arm'
diff --git a/bsp/lm3s/sdcard.c b/bsp/lm3s/sdcard.c
index 7cc34f28c51ed8114081e523316e14141239d737..7699efe51e0411d6ff25dbf269b8b6475b1d6aa4 100644
--- a/bsp/lm3s/sdcard.c
+++ b/bsp/lm3s/sdcard.c
@@ -14,14 +14,31 @@
  * in this file does not attempt to share the SSI port with the osram,
  * it assumes the osram is not being used.
  */
+#include <rtthread.h>
 
-#include "sdcard.h"
 #include <inc/hw_types.h>
 #include <inc/hw_memmap.h>
 #include <driverlib/ssi.h>
 #include <driverlib/gpio.h>
 #include <driverlib/sysctl.h>
 
+/* Status of Disk Functions */
+typedef rt_uint8_t	DSTATUS;
+
+/* Results of Disk Functions */
+typedef enum {
+	RES_OK = 0,		/* 0: Successful */
+	RES_ERROR,		/* 1: R/W Error */
+	RES_WRPRT,		/* 2: Write Protected */
+	RES_NOTRDY,		/* 3: Not Ready */
+	RES_PARERR		/* 4: Invalid Parameter */
+} DRESULT;
+
+/* Disk Status Bits (DSTATUS) */
+
+#define STA_NOINIT		0x01	/* Drive not initialized */
+#define STA_NODISK		0x02	/* No medium in the drive */
+#define STA_PROTECT		0x04	/* Write protected */
 
 /* Definitions for MMC/SDC command */
 #define CMD0    (0x40+0)    /* GO_IDLE_STATE */
@@ -40,6 +57,27 @@
 #define CMD55    (0x40+55)    /* APP_CMD */
 #define CMD58    (0x40+58)    /* READ_OCR */
 
+/* Command code for disk_ioctrl() */
+
+/* Generic command */
+#define CTRL_SYNC			0	/* Mandatory for write functions */
+#define GET_SECTOR_COUNT	1	/* Mandatory for only f_mkfs() */
+#define GET_SECTOR_SIZE		2	/* Mandatory for multiple sector size cfg */
+#define GET_BLOCK_SIZE		3	/* Mandatory for only f_mkfs() */
+#define CTRL_POWER			4
+#define CTRL_LOCK			5
+#define CTRL_EJECT			6
+/* MMC/SDC command */
+#define MMC_GET_TYPE		10
+#define MMC_GET_CSD			11
+#define MMC_GET_CID			12
+#define MMC_GET_OCR			13
+#define MMC_GET_SDSTAT		14
+/* ATA/CF command */
+#define ATA_GET_REV			20
+#define ATA_GET_MODEL		21
+#define ATA_GET_SN			22
+
 /* Peripheral definitions for EK-LM3S6965 board */
 // SSI port
 #define SDC_SSI_BASE            SSI0_BASE
@@ -377,8 +415,8 @@ rt_uint8_t send_cmd (
 /*-----------------------------------------------------------------------*/
 /* Initialize Disk Drive                                                 */
 /*-----------------------------------------------------------------------*/
-
-DSTATUS disk_initialize (
+static
+DSTATUS sdcard_initialize (
     rt_uint8_t drv        /* Physical drive nmuber (0) */
 )
 {
@@ -433,27 +471,11 @@ DSTATUS disk_initialize (
     return Stat;
 }
 
-
-
-/*-----------------------------------------------------------------------*/
-/* Get Disk Status                                                       */
-/*-----------------------------------------------------------------------*/
-
-DSTATUS disk_status (
-    rt_uint8_t drv        /* Physical drive nmuber (0) */
-)
-{
-    if (drv) return STA_NOINIT;        /* Supports only single drive */
-    return Stat;
-}
-
-
-
 /*-----------------------------------------------------------------------*/
 /* Read Sector(s)                                                        */
 /*-----------------------------------------------------------------------*/
-
-DRESULT disk_read (
+static
+DRESULT sdcard_read (
     rt_uint8_t drv,            /* Physical drive nmuber (0) */
     rt_uint8_t *buff,            /* Pointer to the data buffer to store read data */
     rt_uint32_t sector,        /* Start sector number (LBA) */
@@ -495,7 +517,8 @@ DRESULT disk_read (
 /*-----------------------------------------------------------------------*/
 
 #if _READONLY == 0
-DRESULT disk_write (
+static
+DRESULT sdcard_write (
     rt_uint8_t drv,            /* Physical drive nmuber (0) */
     const rt_uint8_t *buff,    /* Pointer to the data to be written */
     rt_uint32_t sector,        /* Start sector number (LBA) */
@@ -541,8 +564,8 @@ DRESULT disk_write (
 /*-----------------------------------------------------------------------*/
 /* Miscellaneous Functions                                               */
 /*-----------------------------------------------------------------------*/
-
-DRESULT disk_ioctl (
+static
+DRESULT sdcard_ioctl (
     rt_uint8_t drv,        /* Physical drive nmuber (0) */
     rt_uint8_t ctrl,        /* Control code */
     void *buff        /* Buffer to send/receive control data */
@@ -641,46 +664,6 @@ DRESULT disk_ioctl (
     return res;
 }
 
-
-
-/*-----------------------------------------------------------------------*/
-/* Device Timer Interrupt Procedure  (Platform dependent)                */
-/*-----------------------------------------------------------------------*/
-/* This function must be called in period of 10ms                        */
-
-void disk_timerproc (void)
-{
-//    rt_uint8_t n, s;
-    rt_uint8_t n;
-
-
-    n = Timer1;                        /* 100Hz decrement timer */
-    if (n) Timer1 = --n;
-    n = Timer2;
-    if (n) Timer2 = --n;
-
-}
-
-/*---------------------------------------------------------*/
-/* User Provided Timer Function for FatFs module           */
-/*---------------------------------------------------------*/
-/* This is a real time clock service to be called from     */
-/* FatFs module. Any valid time must be returned even if   */
-/* the system does not support a real time clock.          */
-
-rt_uint32_t get_fattime (void)
-{
-
-    return    ((2007UL-1980) << 25)    // Year = 2007
-            | (6UL << 21)            // Month = June
-            | (5UL << 16)            // Day = 5
-            | (11U << 11)            // Hour = 11
-            | (38U << 5)            // Min = 38
-            | (0U >> 1)                // Sec = 0
-            ;
-
-}
-
 /*
  * RT-Thread SD Card Driver
  * 20090705 Yi.Qiu
@@ -714,7 +697,7 @@ static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_
 {
 	DRESULT status;
 
-	status = disk_read(0, buffer, part.offset + pos / SECTOR_SIZE, size / SECTOR_SIZE);
+	status = sdcard_read(0, buffer, part.offset + pos / SECTOR_SIZE, size / SECTOR_SIZE);
 	if (status != RES_OK)
 	{
 		rt_kprintf("sd card read failed\n");
@@ -728,7 +711,7 @@ static rt_size_t rt_sdcard_write (rt_device_t dev, rt_off_t pos, const void* buf
 {
 	DRESULT status;
 
-	status = disk_write(0, buffer, part.offset + pos / SECTOR_SIZE, size / SECTOR_SIZE);
+	status = sdcard_write(0, buffer, part.offset + pos / SECTOR_SIZE, size / SECTOR_SIZE);
 	if (status != RES_OK)
 	{
 		rt_kprintf("sd card write failed\n");
@@ -743,9 +726,9 @@ static rt_err_t rt_sdcard_control(rt_device_t dev, rt_uint8_t cmd, void *args)
 	return RT_EOK;
 }
 
-void rt_hw_sdcard_init()
+void rt_hw_sdcard_init(void)
 {
-	if (disk_initialize(0) == RES_OK)
+	if (sdcard_initialize(0) == RES_OK)
 	{
 		DRESULT status;
 		rt_uint8_t *sector;
@@ -757,7 +740,7 @@ void rt_hw_sdcard_init()
 			rt_kprintf("allocate partition sector buffer failed\n");
 			return;
 		}
-		status = disk_read(0, sector, 0, 1);
+		status = sdcard_read(0, sector, 0, 1);
 		if (status == RES_OK)
 		{
 			/* get the first partition */
@@ -781,9 +764,9 @@ void rt_hw_sdcard_init()
 		/* register sdcard device */
 		sdcard_device.init 	= rt_sdcard_init;
 		sdcard_device.open 	= rt_sdcard_open;
-		sdcard_device.close = rt_sdcard_close;
+		sdcard_device.close 	= rt_sdcard_close;
 		sdcard_device.read 	= rt_sdcard_read;
-		sdcard_device.write = rt_sdcard_write;
+		sdcard_device.write 	= rt_sdcard_write;
 		sdcard_device.control = rt_sdcard_control;
 		
 		/* no private */
diff --git a/bsp/lm3s/sdcard.h b/bsp/lm3s/sdcard.h
deleted file mode 100644
index 64d99e7f99f9698263157533dec6529e80a8a47b..0000000000000000000000000000000000000000
--- a/bsp/lm3s/sdcard.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*-----------------------------------------------------------------------
-/  Low level disk interface modlue include file  R0.04a   (C)ChaN, 2007
-/-----------------------------------------------------------------------*/
-
-#ifndef __SDCARD_H__
-#define __SDCARD_H__
-
-#define _READONLY	0	/* 1: Read-only mode */
-
-#include <rtthread.h>
-
-
-/* Status of Disk Functions */
-typedef rt_uint8_t	DSTATUS;
-
-/* Results of Disk Functions */
-typedef enum {
-	RES_OK = 0,		/* 0: Successful */
-	RES_ERROR,		/* 1: R/W Error */
-	RES_WRPRT,		/* 2: Write Protected */
-	RES_NOTRDY,		/* 3: Not Ready */
-	RES_PARERR		/* 4: Invalid Parameter */
-} DRESULT;
-
-
-/*---------------------------------------*/
-/* Prototypes for disk control functions */
-
-DSTATUS disk_initialize (rt_uint8_t);
-DSTATUS disk_status (rt_uint8_t);
-DRESULT disk_read (rt_uint8_t, rt_uint8_t*, rt_uint32_t, rt_uint8_t);
-#if	_READONLY == 0
-DRESULT disk_write (rt_uint8_t, const rt_uint8_t*, rt_uint32_t, rt_uint8_t);
-#endif
-DRESULT disk_ioctl (rt_uint8_t, rt_uint8_t, void*);
-void	disk_timerproc (void);
-
-/* Disk Status Bits (DSTATUS) */
-
-#define STA_NOINIT		0x01	/* Drive not initialized */
-#define STA_NODISK		0x02	/* No medium in the drive */
-#define STA_PROTECT		0x04	/* Write protected */
-
-
-/* Command code for disk_ioctrl() */
-
-#define GET_SECTOR_COUNT	1
-#define GET_SECTOR_SIZE		2
-#define CTRL_SYNC			3
-#define CTRL_POWER			4
-#define CTRL_LOCK			5
-#define CTRL_EJECT			6
-#define MMC_GET_CSD			10
-#define MMC_GET_CID			11
-#define MMC_GET_OCR			12
-#define ATA_GET_REV			20
-#define ATA_GET_MODEL		21
-#define ATA_GET_SN			22
-
-#endif