diff --git a/bsp/fm3/mb9bf506r/application.c b/bsp/fm3/mb9bf506r/application.c
index a689dff68..d5fa30419 100644
--- a/bsp/fm3/mb9bf506r/application.c
+++ b/bsp/fm3/mb9bf506r/application.c
@@ -9,7 +9,7 @@
  *
  * Change Logs:
  * Date           Author       Notes
- * 2011-02-24     Bernard      the first version
+ * 2011-05-24     Bernard      the first version
  */
 
 /**
@@ -21,18 +21,49 @@
 #include "board.h"
 #include "led.h"
 
+#ifdef RT_USING_DFS
+/* dfs init */
+#include <dfs_init.h>
+/* dfs filesystem:ELM filesystem init */
+#include <dfs_elm.h>
+/* dfs Filesystem APIs */
+#include <dfs_fs.h>
+#endif
+
 void rt_init_thread_entry(void *parameter)
 {
+	/* Filesystem Initialization */
+#ifdef RT_USING_DFS
+	{
+		/* init the device filesystem */
+		dfs_init();
+
+#ifdef RT_USING_DFS_ELMFAT
+		/* init the elm chan FatFs filesystam*/
+		elm_init();
+
+		/* mount ELM FatFs on NAND flash as root directory */
+		if (dfs_mount("nand", "/", "elm", 0, 0) == 0)
+		{
+			rt_kprintf("File System initialized!\n");
+		}
+		else
+			rt_kprintf("File System initialzation failed!\n");
+#endif
+	}
+#endif
+	/* LED Initialization */
     rt_hw_led_init();
 }
 
 int rt_application_init()
 {
-    rt_thread_t init_thread;
+	rt_thread_t tid;
 	
-    init_thread = rt_thread_create("init", rt_init_thread_entry, RT_NULL, 1024, 21, 20);
-    if(init_thread != RT_NULL)
-        rt_thread_startup(init_thread);
+	tid = rt_thread_create("init", 
+		rt_init_thread_entry, RT_NULL,
+		2048, 8, 20);
+	if (tid != RT_NULL) rt_thread_startup(tid);
     
     return 0;
 }
diff --git a/bsp/fm3/mb9bf506r/board.c b/bsp/fm3/mb9bf506r/board.c
index 82c8d4c78..9c95c3c41 100644
--- a/bsp/fm3/mb9bf506r/board.c
+++ b/bsp/fm3/mb9bf506r/board.c
@@ -17,30 +17,12 @@
 
 #include "board.h"
 #include "mb9bf506r.h"
-#include "core_cm3.h"
+
+#include "serial.h"
+#include "nand.h"
 
 extern const uint32_t SystemFrequency;
 
-#define UART0	FM3_MFS0_UART
-struct serial_int_rx uart0_int_rx;
-struct serial_device uart0 =
-{
-	UART0,
-	&uart0_int_rx,
-	RT_NULL
-};
-struct rt_device uart0_device;
-
-#define UART2	FM3_MFS2_UART
-struct serial_int_rx uart2_int_rx;
-struct serial_device uart2 =
-{
-	UART2,
-	&uart2_int_rx,
-	RT_NULL
-};
-struct rt_device uart2_device;
-
 /**
  * @addtogroup FM3
  */
@@ -62,48 +44,21 @@ void rt_hw_timer_handler(void)
 	rt_interrupt_leave();
 }
 
-void rt_hw_uart2_rx_handler(void)
-{
-#ifdef RT_USING_UART2
-    extern struct rt_device uart2_device;
-	extern void rt_hw_serial_isr(struct rt_device *device);
-
-    /* enter interrupt */
-    rt_interrupt_enter();
-
-    rt_hw_serial_isr(&uart2_device);
-
-    /* leave interrupt */
-    rt_interrupt_leave();
-#endif
-}
-
-/**
- * This function will handle init uart
- */
-static void rt_hw_uart_init(void)
-{
-    /* Set Uart Ch2 Port, SIN2_1, SOT2_1 */
-    FM3_GPIO->PFR2 = FM3_GPIO->PFR2 | 0x0030;
-    FM3_GPIO->EPFR07 = FM3_GPIO->EPFR07 | 0x000a0000;
-    
-uart2.uart_device->SMR = SMR_MD_UART | SMR_SOE;;
-uart2.uart_device->BGR = (40000000UL + (BPS/2))/BPS - 1;
-uart2.uart_device->ESCR = ESCR_DATABITS_8;
-uart2.uart_device->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
-
-UART_ENABLE_IRQ(MFS2RX_IRQn);
-UART_ENABLE_IRQ(MFS2TX_IRQn);
-}
-
 /**
 * This function will initial FM3 Easy Kit board.
  */
 void rt_hw_board_init()
 {
     /* init systick */
-    SysTick_Config(SystemFrequency/RT_TICK_PER_SECOND - 1);
-    rt_hw_uart_init();
+    SysTick_Config(SystemFrequency/RT_TICK_PER_SECOND);
+    
+	/* initialize UART device */
+	rt_hw_serial_init();
+	/* set console as UART device */
+	rt_console_set_device("uart2");
+	
+	/* initialize nand flash device */
+	rt_hw_nand_init();
 }
 
 /*@}*/
diff --git a/bsp/fm3/mb9bf506r/fm3_easy_kit.dep b/bsp/fm3/mb9bf506r/fm3_easy_kit.dep
index de2931c19..d80e10d1d 100644
--- a/bsp/fm3/mb9bf506r/fm3_easy_kit.dep
+++ b/bsp/fm3/mb9bf506r/fm3_easy_kit.dep
@@ -2,15 +2,15 @@
 
 <project>
   <fileVersion>2</fileVersion>
-  <fileChecksum>119363783</fileChecksum>
+  <fileChecksum>1449275198</fileChecksum>
   <configuration>
     <name>Debug</name>
     <outputs>
       <file>$PROJ_DIR$\..\..\..\include\rtthread.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\clock.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_ops.o</file>
-      <file>$PROJ_DIR$\..\CMSIS\system_mb9bf50x.h</file>
-      <file>$PROJ_DIR$\Debug\Obj\finsh_heap.o</file>
-      <file>$PROJ_DIR$\..\..\..\src\mem.c</file>
+      <file>$PROJ_DIR$\Debug\Obj\object.o</file>
+      <file>$PROJ_DIR$\..\..\..\src\idle.c</file>
       <file>$PROJ_DIR$\..\CMSIS\system_mb9bf50x.c</file>
       <file>$PROJ_DIR$\..\..\..\components\finsh\cmd.c</file>
       <file>$PROJ_DIR$\..\CMSIS\core_cm3.c</file>
@@ -32,35 +32,24 @@
       <file>$PROJ_DIR$\..\..\..\libcpu\arm\fm3\start_iar.S</file>
       <file>$PROJ_DIR$\..\..\..\src\clock.c</file>
       <file>$PROJ_DIR$\..\..\..\src\device.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\idle.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\ipc.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\irq.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\kservice.c</file>
-      <file>$TOOLKIT_DIR$\inc\c\DLib_Threads.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\xencoding_limits.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\DLib_Product.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\yvals.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\DLib_Defaults.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\stdint.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\string.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\ysizet.h</file>
-      <file>$PROJ_DIR$\Debug\Obj\board.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\led.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\nand.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\nand.pbi</file>
+      <file>$PROJ_DIR$\nand.h</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_error.o</file>
+      <file>$PROJ_DIR$\..\..\..\include\rtdebug.h</file>
       <file>$PROJ_DIR$\Debug\Obj\cpuport.o</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_init.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\console.o</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_var.o</file>
       <file>$PROJ_DIR$\serial.h</file>
       <file>$TOOLKIT_DIR$\inc\c\ystdio.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\assert.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\finsh_token.pbi</file>
       <file>$PROJ_DIR$\..\..\..\include\rtm.h</file>
       <file>$PROJ_DIR$\..\..\..\include\rthw.h</file>
       <file>$PROJ_DIR$\board.h</file>
       <file>$TOOLKIT_DIR$\inc\c\stdio.h</file>
       <file>$PROJ_DIR$\led.h</file>
-      <file>$PROJ_DIR$\Debug\Obj\finsh_token.pbi</file>
       <file>$TOOLKIT_DIR$\inc\c\intrinsics.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\scheduler.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\shell.o</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_var.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_vm.pbi</file>
@@ -72,22 +61,8 @@
       <file>$PROJ_DIR$\Debug\Obj\finsh_node.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_ops.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\serial.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\clock.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\scheduler.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\serial.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\console.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\idle.o</file>
-      <file>$TOOLKIT_DIR$\inc\c\stdlib.h</file>
-      <file>$PROJ_DIR$\Debug\Obj\irq.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\clock.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\device.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\slab.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\start_iar.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\core_cm3.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\kservice.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\object.o</file>
-      <file>$PROJ_DIR$\Debug\Obj\system_mb9bf50x.o</file>
       <file>$PROJ_DIR$\Debug\Obj\module.o</file>
+      <file>$TOOLKIT_DIR$\inc\c\stdarg.h</file>
       <file>$PROJ_DIR$\Debug\Obj\application.o</file>
       <file>$PROJ_DIR$\Debug\Obj\slab.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\fault_iar.o</file>
@@ -103,7 +78,7 @@
       <file>$PROJ_DIR$\..\CMSIS\core_cm3.h</file>
       <file>$PROJ_DIR$\..\..\..\src\kservice.h</file>
       <file>$PROJ_DIR$\Debug\Obj\mem.pbi</file>
-      <file>$TOOLKIT_DIR$\inc\c\ycheck.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\finsh\finsh.h</file>
       <file>$PROJ_DIR$\..\CMSIS\core_cmFunc.h</file>
       <file>$PROJ_DIR$\..\..\..\include\rtdef.h</file>
       <file>$PROJ_DIR$\..\CMSIS\core_cmInstr.h</file>
@@ -116,21 +91,7 @@
       <file>$PROJ_DIR$\Debug\Obj\scheduler.o</file>
       <file>$PROJ_DIR$\rtconfig.h</file>
       <file>$TOOLKIT_DIR$\inc\c\wchar.h</file>
-      <file>$PROJ_DIR$\..\..\..\src\mempool.c</file>
-      <file>$PROJ_DIR$\board.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\module.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\object.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\rtm.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\scheduler.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\slab.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\thread.c</file>
-      <file>$PROJ_DIR$\..\..\..\src\timer.c</file>
-      <file>$PROJ_DIR$\application.c</file>
-      <file>$PROJ_DIR$\console.c</file>
-      <file>$PROJ_DIR$\led.c</file>
-      <file>$PROJ_DIR$\serial.c</file>
-      <file>$PROJ_DIR$\startup.c</file>
-      <file>$PROJ_DIR$\..\..\..\components\finsh\finsh.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\DLib_Product_string.h</file>
       <file>$PROJ_DIR$\..\..\..\components\finsh\finsh_heap.h</file>
       <file>$PROJ_DIR$\..\..\..\components\finsh\finsh_error.h</file>
       <file>$PROJ_DIR$\..\..\..\components\finsh\finsh_ops.h</file>
@@ -141,14 +102,45 @@
       <file>$PROJ_DIR$\..\..\..\components\finsh\finsh_vm.h</file>
       <file>$PROJ_DIR$\..\..\..\components\finsh\shell.h</file>
       <file>$PROJ_DIR$\Debug\Obj\board.o</file>
-      <file>$TOOLKIT_DIR$\inc\c\stdarg.h</file>
-      <file>$TOOLKIT_DIR$\inc\c\DLib_Product_string.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\DLib_Threads.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\device.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\timer.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\core_cm3.pbi</file>
-      <file>$PROJ_DIR$\Debug\Obj\device.pbi</file>
+      <file>$TOOLKIT_DIR$\inc\c\xencoding_limits.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\finsh_heap.o</file>
+      <file>$PROJ_DIR$\..\CMSIS\system_mb9bf50x.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\DLib_Product.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\yvals.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\DLib_Defaults.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\stdint.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\string.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\ysizet.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\assert.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\led.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\board.pbi</file>
+      <file>$PROJ_DIR$\..\..\..\src\ipc.c</file>
+      <file>$PROJ_DIR$\board.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\irq.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\kservice.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\mem.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\mempool.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\module.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\object.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\rtm.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\scheduler.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\slab.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\thread.c</file>
+      <file>$PROJ_DIR$\..\..\..\src\timer.c</file>
+      <file>$PROJ_DIR$\application.c</file>
+      <file>$PROJ_DIR$\led.c</file>
+      <file>$PROJ_DIR$\nand.c</file>
+      <file>$PROJ_DIR$\serial.c</file>
+      <file>$PROJ_DIR$\startup.c</file>
       <file>$PROJ_DIR$\Debug\Exe\fm3_easy_kit.out</file>
-      <file>$PROJ_DIR$\Debug\Obj\irq.pbi</file>
       <file>$TOOLKIT_DIR$\inc\c\xtls.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\ctype.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\irq.pbi</file>
+      <file>$TOOLKIT_DIR$\inc\c\xlocale_c.h</file>
       <file>$PROJ_DIR$\Debug\Obj\system_mb9bf50x.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\timer.o</file>
       <file>$PROJ_DIR$\Debug\Obj\startup.pbi</file>
@@ -156,12 +148,11 @@
       <file>$PROJ_DIR$\Debug\Obj\fm3_easy_kit.pbd</file>
       <file>$PROJ_DIR$\Debug\Obj\ipc.o</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_vm.o</file>
-      <file>$TOOLKIT_DIR$\inc\c\ctype.h</file>
-      <file>$PROJ_DIR$\Debug\Obj\cmd.pbi</file>
-      <file>$TOOLKIT_DIR$\inc\c\xlocale_c.h</file>
       <file>$TOOLKIT_DIR$\inc\c\xmtx.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\cmd.pbi</file>
       <file>$TOOLKIT_DIR$\inc\c\xlocaleuse.h</file>
       <file>$TOOLKIT_DIR$\inc\c\xlocale.h</file>
+      <file>$TOOLKIT_DIR$\inc\c\stdlib.h</file>
       <file>$PROJ_DIR$\Debug\Obj\cmd.o</file>
       <file>$PROJ_DIR$\Debug\Obj\thread.pbi</file>
       <file>$PROJ_DIR$\Debug\Obj\kservice.o</file>
@@ -172,23 +163,63 @@
       <file>$PROJ_DIR$\Debug\Obj\finsh_compiler.o</file>
       <file>$PROJ_DIR$\Debug\Obj\symbol.o</file>
       <file>$PROJ_DIR$\Debug\Obj\finsh_token.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\serial.pbi</file>
+      <file>$TOOLKIT_DIR$\inc\c\ycheck.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\idle.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\system_mb9bf50x.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\irq.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\clock.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\device.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\slab.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\start_iar.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\core_cm3.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\kservice.pbi</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_posix.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_file.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_file.c</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_elm.o</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\dfs_elm.c</file>
+      <file>$PROJ_DIR$\Debug\Obj\ff.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\ff.o</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\ff.c</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_fs.c</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\ff.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\ffconf.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\src\dfs.c</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\diskio.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\integer.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_elm.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_posix.c</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_elm.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_file.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_fs.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_fs.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_posix.o</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_file.pbi</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs.pbi</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_fs.h</file>
+      <file>$PROJ_DIR$\Debug\Obj\dfs_posix.pbi</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_init.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs_def.h</file>
+      <file>$PROJ_DIR$\..\..\..\components\dfs\include\dfs.h</file>
     </outputs>
     <file>
-      <name>$PROJ_DIR$\..\..\..\src\mem.c</name>
+      <name>$PROJ_DIR$\..\..\..\src\idle.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 96</file>
+          <name>ICCARM</name>
+          <file> 159</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 106</file>
+          <name>BICOMP</name>
+          <file> 61</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 124 150 155 142 153 71 37 154 152 109 36 136</file>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 70</file>
         </tool>
       </inputs>
     </file>
@@ -196,18 +227,18 @@
       <name>$PROJ_DIR$\..\CMSIS\system_mb9bf50x.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 143</file>
+          <name>ICCARM</name>
+          <file> 160</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 80</file>
+          <name>BICOMP</name>
+          <file> 135</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 101 94 35 97 33 34 32 31 30 100 54 98 2</file>
+          <file> 76 69 106 158 104 105 103 100 96 75 42 73 102</file>
         </tool>
       </inputs>
     </file>
@@ -215,18 +246,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\cmd.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 151</file>
+          <name>ICCARM</name>
+          <file> 147</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 156</file>
+          <name>BICOMP</name>
+          <file> 143</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 124 150 155 142 153 71 37 154 152 109 36 136</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 72 132 145 131 142 146 108 144 134 84 107 85</file>
         </tool>
       </inputs>
     </file>
@@ -234,18 +265,18 @@
       <name>$PROJ_DIR$\..\CMSIS\core_cm3.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 138</file>
+          <name>ICCARM</name>
+          <file> 166</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 77</file>
+          <name>BICOMP</name>
+          <file> 99</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 35 97 33 34 32 31 30</file>
+          <file> 106 158 104 105 103 100 96</file>
         </tool>
       </inputs>
     </file>
@@ -253,18 +284,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_compiler.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 159</file>
+          <name>ICCARM</name>
+          <file> 154</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 163</file>
+          <name>BICOMP</name>
+          <file> 150</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 128 126 131 127 132</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 89 87 92 88 93</file>
         </tool>
       </inputs>
     </file>
@@ -272,18 +303,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_error.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 90</file>
+          <name>ICCARM</name>
+          <file> 29</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 40</file>
+          <name>BICOMP</name>
+          <file> 65</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 126 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136</file>
+          <file> 87 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85</file>
         </tool>
       </inputs>
     </file>
@@ -291,18 +322,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_heap.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 162</file>
+          <name>ICCARM</name>
+          <file> 101</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 3</file>
+          <name>BICOMP</name>
+          <file> 153</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 131</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 92</file>
         </tool>
       </inputs>
     </file>
@@ -310,18 +341,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_init.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 62</file>
+          <name>ICCARM</name>
+          <file> 32</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 42</file>
+          <name>BICOMP</name>
+          <file> 51</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 128 132 131 129 126 125</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 89 93 92 90 87 86</file>
         </tool>
       </inputs>
     </file>
@@ -329,18 +360,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_node.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 63</file>
+          <name>ICCARM</name>
+          <file> 151</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 160</file>
+          <name>BICOMP</name>
+          <file> 52</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 128 126 131 125</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 89 87 92 86</file>
         </tool>
       </inputs>
     </file>
@@ -348,18 +379,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_ops.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 64</file>
+          <name>ICCARM</name>
+          <file> 2</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 1</file>
+          <name>BICOMP</name>
+          <file> 53</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 127 132 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 131</file>
+          <file> 88 93 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 92</file>
         </tool>
       </inputs>
     </file>
@@ -367,18 +398,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_parser.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 61</file>
+          <name>ICCARM</name>
+          <file> 152</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 161</file>
+          <name>BICOMP</name>
+          <file> 50</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 130 128 126 129 131</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 91 89 87 90 92</file>
         </tool>
       </inputs>
     </file>
@@ -386,18 +417,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_token.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 53</file>
+          <name>ICCARM</name>
+          <file> 156</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 165</file>
+          <name>BICOMP</name>
+          <file> 36</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 130 126</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 91 87</file>
         </tool>
       </inputs>
     </file>
@@ -405,18 +436,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_var.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 56</file>
+          <name>ICCARM</name>
+          <file> 33</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 44</file>
+          <name>BICOMP</name>
+          <file> 45</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 131</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 92</file>
         </tool>
       </inputs>
     </file>
@@ -424,18 +455,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\finsh_vm.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 57</file>
+          <name>ICCARM</name>
+          <file> 141</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 149</file>
+          <name>BICOMP</name>
+          <file> 46</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136 132 131 127</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85 93 92 88</file>
         </tool>
       </inputs>
     </file>
@@ -443,18 +474,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\shell.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 58</file>
+          <name>ICCARM</name>
+          <file> 44</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 55</file>
+          <name>BICOMP</name>
+          <file> 47</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 124 150 155 142 153 71 37 154 152 109 36 136 133</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 72 132 145 131 142 146 108 144 134 84 107 85 94 168 169 195 196 192</file>
         </tool>
       </inputs>
     </file>
@@ -462,18 +493,18 @@
       <name>$PROJ_DIR$\..\..\..\components\finsh\symbol.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 59</file>
+          <name>ICCARM</name>
+          <file> 155</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 164</file>
+          <name>BICOMP</name>
+          <file> 48</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 124 0 99 108 135 97 33 34 32 31 30 150 155 142 153 71 37 154 152 109 36 136</file>
+          <file> 72 0 74 83 56 158 104 105 103 100 96 30 132 145 131 142 146 108 144 134 84 107 85</file>
         </tool>
       </inputs>
     </file>
@@ -482,7 +513,7 @@
       <outputs>
         <tool>
           <name>AARM</name>
-          <file> 87</file>
+          <file> 62</file>
         </tool>
       </outputs>
     </file>
@@ -490,18 +521,18 @@
       <name>$PROJ_DIR$\..\..\..\libcpu\arm\fm3\cpuport.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 92</file>
+          <name>ICCARM</name>
+          <file> 31</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 41</file>
+          <name>BICOMP</name>
+          <file> 67</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 49 0 99 108 135 97 33 34 32 31 30 101 94 35 100 54 98 2</file>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 76 69 106 75 42 73 102</file>
         </tool>
       </inputs>
     </file>
@@ -510,7 +541,7 @@
       <outputs>
         <tool>
           <name>AARM</name>
-          <file> 84</file>
+          <file> 59</file>
         </tool>
       </outputs>
     </file>
@@ -519,7 +550,7 @@
       <outputs>
         <tool>
           <name>AARM</name>
-          <file> 76</file>
+          <file> 165</file>
         </tool>
       </outputs>
     </file>
@@ -527,18 +558,18 @@
       <name>$PROJ_DIR$\..\..\..\src\clock.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 66</file>
+          <name>ICCARM</name>
+          <file> 162</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 73</file>
+          <name>BICOMP</name>
+          <file> 1</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30</file>
         </tool>
       </inputs>
     </file>
@@ -546,94 +577,18 @@
       <name>$PROJ_DIR$\..\..\..\src\device.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 139</file>
+          <name>ICCARM</name>
+          <file> 163</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 74</file>
+          <name>BICOMP</name>
+          <file> 97</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 95</file>
-        </tool>
-      </inputs>
-    </file>
-    <file>
-      <name>$PROJ_DIR$\..\..\..\src\idle.c</name>
-      <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 86</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 70</file>
-        </tool>
-      </outputs>
-      <inputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 49 0 99 108 135 97 33 34 32 31 30 95</file>
-        </tool>
-      </inputs>
-    </file>
-    <file>
-      <name>$PROJ_DIR$\..\..\..\src\ipc.c</name>
-      <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 105</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 148</file>
-        </tool>
-      </outputs>
-      <inputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 95</file>
-        </tool>
-      </inputs>
-    </file>
-    <file>
-      <name>$PROJ_DIR$\..\..\..\src\irq.c</name>
-      <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 141</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 72</file>
-        </tool>
-      </outputs>
-      <inputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 49 0 99 108 135 97 33 34 32 31 30</file>
-        </tool>
-      </inputs>
-    </file>
-    <file>
-      <name>$PROJ_DIR$\..\..\..\src\kservice.c</name>
-      <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 78</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 158</file>
-        </tool>
-      </outputs>
-      <inputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 70</file>
         </tool>
       </inputs>
     </file>
@@ -642,58 +597,140 @@
       <outputs>
         <tool>
           <name>ILINK</name>
-          <file> 140</file>
+          <file> 130</file>
         </tool>
       </outputs>
     </file>
     <file>
-      <name>$PROJ_DIR$\..\..\..\src\mempool.c</name>
+      <name>$PROJ_DIR$\..\..\..\src\ipc.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 85</file>
+          <name>ICCARM</name>
+          <file> 140</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 91</file>
+          <name>BICOMP</name>
+          <file> 80</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 49 0 99 108 135 97 33 34 32 31 30 95</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 70</file>
         </tool>
       </inputs>
     </file>
     <file>
       <name>$PROJ_DIR$\board.c</name>
       <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 38</file>
-        </tool>
         <tool>
           <name>ICCARM</name>
-          <file> 134</file>
+          <file> 95</file>
         </tool>
-      </outputs>
-    </file>
-    <file>
-      <name>$PROJ_DIR$\..\..\..\src\module.c</name>
-      <outputs>
         <tool>
           <name>BICOMP</name>
-          <file> 104</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 81</file>
+          <file> 111</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 48 36 37 136 95</file>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 39 34 76 69 106 75 42 73 102 28</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\src\irq.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 161</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 133</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\src\kservice.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 149</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 167</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\src\mem.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 81</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 71</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 72 132 145 131 142 146 108 144 134 84 107 85</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\src\mempool.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 66</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 60</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 70</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\src\module.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 55</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 79</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 37 107 108 85 70</file>
         </tool>
       </inputs>
     </file>
@@ -701,18 +738,18 @@
       <name>$PROJ_DIR$\..\..\..\src\object.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 102</file>
+          <name>ICCARM</name>
+          <file> 3</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 79</file>
+          <name>BICOMP</name>
+          <file> 77</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 95</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 70</file>
         </tool>
       </inputs>
     </file>
@@ -720,18 +757,18 @@
       <name>$PROJ_DIR$\..\..\..\src\rtm.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 88</file>
+          <name>ICCARM</name>
+          <file> 64</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 89</file>
+          <name>BICOMP</name>
+          <file> 63</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 47 71 37 36 136 51 46</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 109 146 108 107 85 40 35</file>
         </tool>
       </inputs>
     </file>
@@ -739,18 +776,18 @@
       <name>$PROJ_DIR$\..\..\..\src\scheduler.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 67</file>
+          <name>ICCARM</name>
+          <file> 82</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 107</file>
+          <name>BICOMP</name>
+          <file> 43</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 95</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 70</file>
         </tool>
       </inputs>
     </file>
@@ -758,18 +795,18 @@
       <name>$PROJ_DIR$\..\..\..\src\slab.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 83</file>
+          <name>ICCARM</name>
+          <file> 164</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 75</file>
+          <name>BICOMP</name>
+          <file> 58</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 49 0 99 108 135 97 33 34 32 31 30 95</file>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 70</file>
         </tool>
       </inputs>
     </file>
@@ -777,18 +814,18 @@
       <name>$PROJ_DIR$\..\..\..\src\thread.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 157</file>
+          <name>ICCARM</name>
+          <file> 49</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 60</file>
+          <name>BICOMP</name>
+          <file> 148</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 95</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 70</file>
         </tool>
       </inputs>
     </file>
@@ -796,18 +833,18 @@
       <name>$PROJ_DIR$\..\..\..\src\timer.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 137</file>
+          <name>ICCARM</name>
+          <file> 136</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 144</file>
+          <name>BICOMP</name>
+          <file> 98</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 49 95</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 70</file>
         </tool>
       </inputs>
     </file>
@@ -815,72 +852,219 @@
       <name>$PROJ_DIR$\application.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 103</file>
+          <name>ICCARM</name>
+          <file> 57</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 82</file>
+          <name>BICOMP</name>
+          <file> 78</file>
         </tool>
       </outputs>
       <inputs>
         <tool>
           <name>BICOMP</name>
-          <file> 0 99 108 135 97 33 34 32 31 30 50 45 49 101 94 35 100 54 98 2 52</file>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 39 34 38 76 69 106 75 42 73 102 41 194 182 192 195</file>
         </tool>
       </inputs>
     </file>
-    <file>
-      <name>$PROJ_DIR$\console.c</name>
-      <outputs>
-        <tool>
-          <name>BICOMP</name>
-          <file> 69</file>
-        </tool>
-        <tool>
-          <name>ICCARM</name>
-          <file> 43</file>
-        </tool>
-      </outputs>
-    </file>
     <file>
       <name>$PROJ_DIR$\led.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 39</file>
+          <name>ICCARM</name>
+          <file> 138</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 146</file>
+          <name>BICOMP</name>
+          <file> 110</file>
         </tool>
       </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 38 76 69 106 75 42 73 102 41</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\nand.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 26</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 27</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 28 0 74 83 56 158 104 105 103 100 96 30 76 69 106 75 42 73 102</file>
+        </tool>
+      </inputs>
     </file>
     <file>
       <name>$PROJ_DIR$\serial.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 68</file>
+          <name>ICCARM</name>
+          <file> 54</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 65</file>
+          <name>BICOMP</name>
+          <file> 157</file>
         </tool>
       </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 34 38 76 69 106 75 42 73 102</file>
+        </tool>
+      </inputs>
     </file>
     <file>
       <name>$PROJ_DIR$\startup.c</name>
       <outputs>
         <tool>
-          <name>BICOMP</name>
-          <file> 145</file>
+          <name>ICCARM</name>
+          <file> 68</file>
         </tool>
         <tool>
-          <name>ICCARM</name>
-          <file> 93</file>
+          <name>BICOMP</name>
+          <file> 137</file>
         </tool>
       </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 38 0 74 83 56 158 104 105 103 100 96 30 39 34 76 69 106 75 42 73 102 72 132 145 131 142 146 108 144 134 84 107 85</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\Debug\Obj\fm3_easy_kit.pbd</name>
+      <inputs>
+        <tool>
+          <name>BILINK</name>
+          <file> 78 111 1 143 99 67 97 191 184 190 186 193 173 150 65 153 51 52 53 50 36 45 46 61 80 133 167 110 71 60 79 27 77 63 43 157 47 58 137 48 135 148 98</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_file.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 185</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 190</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 196 107 158 104 105 103 100 96 108 85 169 195 0 74 83 56 30 192 72 132 145 131 142 146 144 134 84</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\dfs_elm.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 171</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 184</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 0 74 83 56 158 104 105 103 100 96 30 178 177 181 192 195 180</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\ff.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 174</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 173</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 177 0 74 83 56 158 104 105 103 100 96 30 181 178 180</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_fs.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 188</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 186</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 192 195 0 74 83 56 158 104 105 103 100 96 30 169 196 107 108 85 72 132 145 131 142 146 144 134 84</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 187</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 191</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 196 107 158 104 105 103 100 96 108 85 192 195 0 74 83 56 30 169</file>
+        </tool>
+      </inputs>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_posix.c</name>
+      <outputs>
+        <tool>
+          <name>ICCARM</name>
+          <file> 189</file>
+        </tool>
+        <tool>
+          <name>BICOMP</name>
+          <file> 193</file>
+        </tool>
+      </outputs>
+      <inputs>
+        <tool>
+          <name>BICOMP</name>
+          <file> 196 107 158 104 105 103 100 96 108 85 168 169 195 0 74 83 56 30 192 72 132 145 131 142 146 144 134 84</file>
+        </tool>
+      </inputs>
     </file>
   </configuration>
   <configuration>
diff --git a/bsp/fm3/mb9bf506r/fm3_easy_kit.ewp b/bsp/fm3/mb9bf506r/fm3_easy_kit.ewp
index dbf4ff4f7..06ade83a2 100644
--- a/bsp/fm3/mb9bf506r/fm3_easy_kit.ewp
+++ b/bsp/fm3/mb9bf506r/fm3_easy_kit.ewp
@@ -289,6 +289,8 @@
           <state>$PROJ_DIR$\..\CMSIS</state>
           <state>$PROJ_DIR$\..\..\..\include</state>
           <state>$PROJ_DIR$\..\..\..\components\finsh</state>
+          <state>$PROJ_DIR$\..\..\..\components\dfs\include</state>
+          <state>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat</state>
         </option>
         <option>
           <name>CCStdIncCheck</name>
@@ -1746,6 +1748,27 @@
       <name>$PROJ_DIR$\..\CMSIS\system_mb9bf50x.c</name>
     </file>
   </group>
+  <group>
+    <name>Filesystem</name>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs.c</name>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\dfs_elm.c</name>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_file.c</name>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_fs.c</name>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\src\dfs_posix.c</name>
+    </file>
+    <file>
+      <name>$PROJ_DIR$\..\..\..\components\dfs\filesystems\elmfat\ff.c</name>
+    </file>
+  </group>
   <group>
     <name>Finsh</name>
     <file>
@@ -1860,10 +1883,10 @@
       <name>$PROJ_DIR$\board.c</name>
     </file>
     <file>
-      <name>$PROJ_DIR$\console.c</name>
+      <name>$PROJ_DIR$\led.c</name>
     </file>
     <file>
-      <name>$PROJ_DIR$\led.c</name>
+      <name>$PROJ_DIR$\nand.c</name>
     </file>
     <file>
       <name>$PROJ_DIR$\serial.c</name>
diff --git a/bsp/fm3/mb9bf506r/nand.c b/bsp/fm3/mb9bf506r/nand.c
new file mode 100644
index 000000000..27d6a634b
--- /dev/null
+++ b/bsp/fm3/mb9bf506r/nand.c
@@ -0,0 +1,667 @@
+/*
+ * File      : nand.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-05-25     Bernard      first version
+ */
+
+#include "nand.h"
+#include "mb9bf506r.h"
+
+/*
+ * NandFlash driver for SamSung K9F5608 
+ * 32M x 8bit
+ */
+#define PAGE_SIZE		512
+#define PAGE_PER_BLOCK	32
+#define BLOCK_NUM		2048
+
+/* device driver debug trace */
+/* #define NAND_DEBUG */
+#ifdef NAND_DEBUG
+#define trace_log 		rt_kprintf
+#else
+#define trace_log(...)
+#endif
+
+/*
+ * OOB,
+ * when block has been erased,  OOB is 0xff.
+ * when block has been written, OOB is 0x00.
+ */
+struct rt_device_nand
+{
+	struct rt_device parent; 	/* which is inherited from rt_device */
+
+	rt_uint16_t block_num;		/* total block number in device 	*/
+	rt_uint16_t page_per_block;	/* pages in one block 				*/
+	rt_uint16_t page_size;		/* page size 						*/
+
+	/* this buffer which used as to save data before erase block 	*/
+	rt_uint8_t  block_buffer[PAGE_SIZE * PAGE_PER_BLOCK];
+};
+static struct rt_device_nand _nand;
+
+/* Flash operation definition */
+#define NF_CMD(cmd)     {*(volatile unsigned char*)(NF_FLASH_BASE_ADDR+NF_CMD_OFFSET) = (unsigned char)(cmd);}
+#define NF_ADDR(addr)   {*(volatile unsigned char*)(NF_FLASH_BASE_ADDR+NF_ADDR_OFFSET)= (unsigned char)(addr);}
+#define NF_RDDATA()     (*(volatile unsigned char*)(NF_FLASH_BASE_ADDR+NF_DATA_OFFSET))
+#define NF_WRDATA(data) {*(volatile unsigned char*)(NF_FLASH_BASE_ADDR+NF_DATA_OFFSET)= (unsigned char)(data);}
+#define NF_CLR_ALE()    {*(volatile unsigned char*)(NF_FLASH_BASE_ADDR+NF_ALE_OFFSET) = (unsigned char)0;}
+
+/* Flash Control IO definition */
+#define NF_OE_H()       {IO_NF_PDOR |= NF_EN;}
+#define NF_OE_L()       {IO_NF_PDOR &= ~NF_EN;}
+
+#define NF_DATA_OUT()	{IO_NF_PDOR &= ~NF_DATA_DIR;}
+#define NF_DATA_IN()	{IO_NF_PDOR |= NF_DATA_DIR;}
+
+static unsigned char NF_ReadStatus(void);
+static void Wait(unsigned int cnt);
+static void NF_Reset(void);
+
+static void Wait(unsigned int cnt)
+{
+    while(cnt--);
+}
+
+static void NF_Reset(void)
+{
+    NF_OE_L();
+    NF_DATA_OUT();
+    NF_CMD(NAND_CMD_RESET);
+    NF_OE_H();
+
+    Wait(10000);  /* wait for Trst */
+}
+
+static unsigned char NF_ReadStatus(void)
+{
+    unsigned int timeout=0;
+    NF_DATA_OUT();
+    NF_CMD(NAND_CMD_STATUS);
+    NF_DATA_IN();
+
+    while(!(NF_RDDATA() & 0x40))
+    {
+       timeout++;
+       if(timeout == 0x00080000)
+         return FLASH_NG;
+    }
+    if(NF_RDDATA() & 0x01)return FLASH_NG;
+
+    return FLASH_OK;
+}
+
+/*
+ * @ Funciton: NF_Init
+ *   Parameter: None
+ *   Return: None
+ */
+static void NF_Init(void)
+{
+    FM3_GPIO->PFR5 |= (0x7ff);		/*  D0-D5, CS7, ALE, CLE, WEX, REX */
+    FM3_GPIO->PFR3 |= (0x3);		/* D6-D7 */
+    FM3_GPIO->EPFR10 |= (1<<13		/* CS enable */
+                       |1<<6		/* ALE, CLE, WEX, REX enable */
+                       |1<<0);		/* D0-D7 enable */
+    FM3_EXBUS->AREA7 = 0x001f00e0;  /* Select CS7 area, 32Mbyte size */
+    FM3_EXBUS->MODE7 |= (1<<4);     /* Nand Flash mode turn on, set 8 bit width */
+
+    IO_NF_PFR = IO_NF_PFR & ~(NF_EN|NF_DATA_DIR);
+    IO_NF_DDR = IO_NF_DDR | (NF_EN|NF_DATA_DIR);
+    IO_NF_PDOR = IO_NF_PDOR | (NF_EN | NF_DATA_DIR); /* disable Flash operation */
+
+    /*Reset NAND*/
+    NF_Reset();
+}
+
+static void NF_UnInit(void)
+{
+    FM3_GPIO->PFR5 &= ~(0x7ff);		/*  disable D0-D5, CS7, ALE, CLE, WEX, REX */
+    FM3_GPIO->PFR3 &= ~(0x3);		/* disable D6-D7 */
+    FM3_GPIO->EPFR10 &= ~(1<<13		/* disable CS enable */
+                       |1<<6        /* disable ALE, CLE, WEX, REX enable */
+                       |1<<0);      /* disable D0-D7 enable */
+    FM3_EXBUS->MODE7 &= ~(1<<4);
+    IO_NF_PFR = IO_NF_PFR & ~(NF_EN|NF_DATA_DIR);
+    IO_NF_DDR = IO_NF_DDR | (NF_EN|NF_DATA_DIR);
+    IO_NF_PDOR = IO_NF_PDOR | (NF_EN | NF_DATA_DIR); /* disable Flash operation */
+}
+
+/*
+ * @ Funciton: NF_ReadPage
+ *   Parameter: block (max: 2048)
+ *              page  (max:32)
+ *              buffer: pointer to data buffer
+ *   Return: 0: Flash Operation OK
+ *           1: Flash Operation NG
+ */
+int NF_ReadPage(unsigned int block, unsigned int page, unsigned char *buffer, 
+                unsigned char *oob)
+{
+    unsigned int blockPage,i;
+
+    NF_Init();
+    blockPage=(block<<5)+page;					    /* 1 block=32 page */
+    NF_OE_L();
+    NF_DATA_OUT();
+	if (buffer != RT_NULL)
+	{
+		volatile unsigned char ch;
+
+		NF_CMD(NAND_CMD_READ0);						/* send read data */
+
+		NF_ADDR(0);
+		NF_ADDR(blockPage & 0xff);
+		NF_ADDR((blockPage>>8) & 0xff);             /* send 3 byte address */
+		NF_CLR_ALE();
+		NF_DATA_IN();
+
+		Wait(500);
+
+		for(i=0;i<512;i++)							/* read 512 bytes data */
+			buffer[i] = NF_RDDATA();
+		for(i=0;i<16;i++)							/* read 16 bytes oob */
+			if (oob != RT_NULL)
+				oob[i] = NF_RDDATA();
+			else
+				ch = NF_RDDATA();
+	}
+	else
+	{
+		NF_CMD(NAND_CMD_READOOB);					/* send read data */
+
+		NF_ADDR(0);
+		NF_ADDR(blockPage & 0xff);
+		NF_ADDR((blockPage>>8) & 0xff);				/* send 3 byte address */
+		NF_CLR_ALE();
+		NF_DATA_IN();
+
+		Wait(500);
+
+		for (i=0; i<16; i++)						/* read 16 bytes oob */
+		   oob[i] = NF_RDDATA();
+	}
+
+    NF_OE_H();
+    NF_UnInit();
+    return 0;
+}
+
+/*
+ * @ Funciton: NF_EraseBlock
+ *   Parameter: block (max: 2048)
+ *   Return: 0: Flash Operation OK
+ *           1: Flash Operation NG
+ */
+int NF_EraseBlock(unsigned int block)
+{
+    rt_uint32_t blockPage;
+
+	trace_log("Erase block %d: ", block);
+
+    NF_Init();
+    blockPage = (block << 5);
+    NF_OE_L();
+    NF_DATA_OUT();
+    NF_CMD(NAND_CMD_ERASE1);                        /* send erase command */
+    NF_ADDR(blockPage & 0xff);
+    NF_ADDR((blockPage >> 8) & 0xff);
+    NF_CMD(NAND_CMD_ERASE2);                        /* start erase */
+
+    if(NF_ReadStatus())
+    {
+		NF_Reset();
+		NF_OE_H();
+		NF_UnInit();
+		trace_log("Failed\n");
+		rt_kprintf("erase block failed\n");
+
+		return FLASH_NG;
+    }
+
+    NF_OE_H();
+    NF_UnInit();
+
+	trace_log("OK\n");
+
+    return FLASH_OK;
+}
+
+/*
+ * @ Funciton: NF_WritePage
+ *   Parameter: block (max: 2048)
+ *              page  (max:32)
+ *              buffer: pointer to data buffer
+ *   Return: 0: Flash Operation OK
+ *           1: Flash Operation NG
+ */
+int NF_WritePage(unsigned block, unsigned page, const rt_uint8_t *buffer)
+{
+    unsigned int blockPage,i;
+    unsigned char se[16] = {0};
+    unsigned char data;
+
+    blockPage = (block<<5)+page;
+    NF_Init();
+    NF_OE_L();
+    NF_DATA_OUT();
+    NF_CMD(0x00);                                    /* set programming area */
+    NF_CMD(NAND_CMD_SEQIN);                          /* send write command */
+    NF_ADDR(0);
+    NF_ADDR(blockPage & 0xff);
+    NF_ADDR((blockPage>>8) & 0xff);
+    NF_CLR_ALE();
+
+    for(i=0;i<512;i++) NF_WRDATA(buffer[i]);	/* write data */
+    for(i=0;i<16;i++) NF_WRDATA(se[i]);			/* dummy write */
+
+    NF_CMD(NAND_CMD_PAGEPROG);					/* start programming */
+
+    if(NF_ReadStatus())
+    {
+		NF_Reset();
+		NF_OE_H();
+		NF_UnInit();
+		
+		trace_log("write failed\n");
+		return FLASH_NG;
+    }
+
+    /* verify the write data */
+    NF_DATA_OUT();
+    NF_CMD(NAND_CMD_READ0);						/* send read command */
+    NF_ADDR(0);
+    NF_ADDR(blockPage & 0xff);
+    NF_ADDR((blockPage>>8) & 0xff);
+    NF_CLR_ALE();
+    NF_DATA_IN();
+
+    Wait(500);
+    for(i=0; i<512; i++)
+    {
+        data=NF_RDDATA();						/* verify 1-512 byte */
+        if(data != buffer[i])
+        {
+			trace_log("block %d, page %d\n", block , page);
+			trace_log("write data failed[%d]: %02x %02x\n", i, data, buffer[i]);
+
+            NF_Reset();
+            NF_OE_H();
+            NF_UnInit();
+            return FLASH_NG;
+        }
+    }
+
+    for(i=0; i<16; i++)
+    {
+       data=NF_RDDATA();						/* verify 16 byte dummy data */
+        if(data != se[i])
+        {
+			trace_log("block %d, page %d\n", block , page);
+			trace_log("write oob failed[%d]: %02x %02x\n", i, data, se[i]);
+            NF_Reset();
+            NF_OE_H();
+            NF_UnInit();
+            return FLASH_NG;
+        }
+    }
+
+    NF_OE_H();
+    NF_UnInit();
+    return FLASH_OK;
+}
+
+/*
+ * @ Funciton: NF_ReadID
+ *   Parameter: id: pointer to device ID
+ *   Return: None
+ */
+void NF_ReadID(unsigned char *id)
+{
+	unsigned char maker_code;
+    NF_Init();
+    NF_OE_L();
+    NF_DATA_OUT();
+    NF_CMD(NAND_CMD_READID);
+    NF_ADDR(0x00);
+    NF_CLR_ALE();
+    Wait(10);
+    NF_DATA_IN();
+    maker_code = NF_RDDATA();
+	maker_code = maker_code;
+    *id = NF_RDDATA();
+    NF_OE_H();
+    NF_UnInit();
+}
+
+static rt_err_t rt_nand_init (rt_device_t dev)
+{
+	/* empty implementation */
+	return RT_EOK;
+}
+
+static rt_err_t rt_nand_open(rt_device_t dev, rt_uint16_t oflag)
+{
+	/* empty implementation */
+	return RT_EOK;
+}
+
+static rt_err_t rt_nand_close(rt_device_t dev)
+{
+	/* empty implementation */
+	return RT_EOK;
+}
+
+/* nand device read */
+static rt_size_t rt_nand_read (rt_device_t dev, rt_off_t pos, void* buffer, 
+                               rt_size_t size)
+{
+	rt_ubase_t block;			/* block of position */
+	rt_ubase_t page, index;		/* page in block of position */
+	rt_uint8_t *page_ptr, oob[16];
+	struct rt_device_nand *nand;
+
+	/* get nand device */
+	nand = (struct rt_device_nand*) dev;
+	RT_ASSERT(nand != RT_NULL);
+
+	/* get block and page */
+	block = pos / nand->page_per_block;
+	page  = pos % nand->page_per_block;
+
+	trace_log("nand read: position %d, block %d, page %d, size %d\n", 
+		pos, block, page, size);
+
+	/* set page buffer pointer */
+	page_ptr = (rt_uint8_t*) buffer;
+	for (index = 0; index < size; index ++)
+	{
+		NF_ReadPage(block, page + index, page_ptr, oob);
+		page_ptr += nand->page_size;
+		
+		if (page + index > nand->page_per_block)
+		{
+			block += 1;
+			page = 0;
+		}
+	}
+
+	/* return read size (count of block) */
+	return size;
+}
+
+/*
+ * write pages by erase block first
+ * @param nand the nand device driver
+ * @param block the block of page
+ * @param page the page
+ * @param buffer the data buffer to be written
+ * @param pages the number of pages to be written
+ */
+static int rt_nand_eraseblock_writepage(struct rt_device_nand* nand, 
+                                        rt_ubase_t block, rt_ubase_t page, 
+	const rt_uint8_t *buffer, rt_ubase_t pages)
+{
+	rt_ubase_t index;
+	rt_uint32_t page_status;
+	rt_uint8_t *page_ptr, oob[16];
+
+	/* set page status */
+	page_status = 0;
+
+	/* read each page in block */
+	page_ptr = nand->block_buffer;
+	for (index = 0; index < nand->page_per_block; index ++)
+	{
+		NF_ReadPage(block, index, page_ptr, oob);
+		if (!oob[0])
+			page_status |= (1 << index);
+		page_ptr += nand->page_size;
+	}
+
+	/* erase block */
+	NF_EraseBlock(block);
+
+	page_ptr = &(nand->block_buffer[page * nand->page_size]);
+	/* merge buffer to page buffer */
+	for (index = 0; index < pages; index ++)
+	{
+		rt_memcpy(page_ptr, buffer, nand->page_size);
+
+		/* set page status */
+		page_status |= (1 << (page + index));
+
+		/* move to next page */
+		page_ptr += nand->page_size;
+		buffer += nand->page_size;
+	}
+
+	/* write to flash */
+	page_ptr = nand->block_buffer;
+	for (index = 0; index < nand->page_per_block; index ++)
+	{
+		if (page_status & (1 << index))
+			NF_WritePage(block, index, page_ptr);
+
+		/* move to next page */
+		page_ptr += nand->page_size;
+	}
+
+	return 0;
+}
+
+/* nand device write */
+static rt_size_t rt_nand_write (rt_device_t dev, rt_off_t pos, 
+                                const void* buffer, rt_size_t size)
+{
+	rt_ubase_t block, page;
+	rt_uint8_t oob[16];
+	struct rt_device_nand *nand;
+
+	nand = (struct rt_device_nand*) dev;
+	RT_ASSERT(nand != RT_NULL);
+
+	/* get block and page */
+	block = pos / nand->page_per_block;
+	page  = pos % nand->page_per_block;
+
+	trace_log("nand write: position %d, block %d, page %d, size %d\n", 
+		pos, block, page, size);
+
+	if (size == 1)
+	{
+		/* write one page */
+
+		/* read oob to get page status */
+		NF_ReadPage(block, page, RT_NULL, oob);
+		if (oob[0])
+			NF_WritePage(block, page, buffer);
+		else
+			/* erase block and then write page */
+			rt_nand_eraseblock_writepage(nand, block, page, buffer, 1);
+	}
+	else if (size > 1)
+	{
+		rt_ubase_t index;
+		rt_ubase_t need_erase_block;
+		const rt_uint8_t *page_ptr;
+		rt_ubase_t chunk_pages, pages;
+
+		pages = size;
+		page_ptr = (const rt_uint8_t*) buffer;
+		do
+		{
+			need_erase_block = 0;
+			/* calculate pages in current chunk */
+			if (pages > nand->page_per_block - page)
+				chunk_pages = nand->page_per_block - page;
+			else 
+				chunk_pages = pages;
+
+			/* get page status in current block */
+			for (index = page; index < page + chunk_pages; index ++)
+			{
+				NF_ReadPage(block, index, RT_NULL, oob);
+				if (!oob[0])
+				{
+					/* this page has data, need erase this block firstly */
+					need_erase_block = 1;
+					break;
+				}
+			}
+
+			if (need_erase_block)
+			{
+				/* erase block and then write it */
+				rt_nand_eraseblock_writepage(nand, block, page, page_ptr, chunk_pages);
+				page_ptr += chunk_pages * nand->page_size;
+			}
+			else
+			{
+				/* write pages directly */
+				for (index = page; index < page + chunk_pages; index ++)
+				{
+					NF_WritePage(block, index, page_ptr);
+					page_ptr += nand->page_size;
+				}
+			}
+
+			pages -= chunk_pages;
+			page = 0; block ++; /* move to next block */
+		}
+		while (pages);
+	}
+
+	return size;
+}
+
+static rt_err_t rt_nand_control (rt_device_t dev, rt_uint8_t cmd, void *args)
+{
+	struct rt_device_nand *nand;
+
+	nand = (struct rt_device_nand*) dev;
+    RT_ASSERT(dev != RT_NULL);
+
+    switch (cmd)
+	{
+	case RT_DEVICE_CTRL_BLK_GETGEOME:
+		{
+			struct rt_device_blk_geometry *geometry;
+
+			geometry = (struct rt_device_blk_geometry *)args;
+			if (geometry == RT_NULL) return -RT_ERROR;
+
+			geometry->bytes_per_sector = nand->page_size;
+			geometry->block_size = nand->page_size * nand->page_per_block;
+			geometry->sector_count = nand->block_num * nand->page_per_block;
+		}
+		break;
+	}
+
+	return RT_EOK;
+}
+
+void rt_hw_nand_init(void)
+{
+	/* initialize nand flash structure */
+	_nand.block_num = BLOCK_NUM;
+	_nand.page_per_block = PAGE_PER_BLOCK;
+	_nand.page_size = PAGE_SIZE;
+
+	rt_memset(_nand.block_buffer, 0, sizeof(_nand.block_buffer));
+
+	_nand.parent.type 		= RT_Device_Class_MTD;
+	_nand.parent.rx_indicate = RT_NULL;
+	_nand.parent.tx_complete = RT_NULL;
+	_nand.parent.init 		= rt_nand_init;
+	_nand.parent.open		= rt_nand_open;
+	_nand.parent.close		= rt_nand_close;
+	_nand.parent.read 		= rt_nand_read;
+	_nand.parent.write 		= rt_nand_write;
+	_nand.parent.control 	= rt_nand_control;
+
+	/* register a MTD device */
+	rt_device_register(&(_nand.parent), "nand", RT_DEVICE_FLAG_RDWR);
+}
+
+#ifdef NAND_DEBUG
+#include <finsh.h>
+unsigned char nand_buffer[512];
+unsigned char nand_oob[16];
+
+void dump_mem(unsigned char* buffer, int length)
+{
+	int i;
+
+	if (length > 64) length = 64;	
+	for (i = 0; i < length; i ++)
+	{
+		rt_kprintf("%02x ", *buffer++);
+		if (((i+1) % 16) == 0)
+		rt_kprintf("\n");
+	}
+	rt_kprintf("\n");
+}
+
+void nand_read(int block, int page)
+{
+	rt_kprintf("read block %d, page %d\n", block, page);
+
+	NF_ReadPage(block, page, nand_buffer, nand_oob);
+	rt_kprintf("page data:\n");
+	dump_mem(nand_buffer, 512);
+	rt_kprintf("oob data:\n");
+	dump_mem(nand_oob, 16);
+}
+FINSH_FUNCTION_EXPORT_ALIAS(nand_read, read_page, read page[block/page]);
+
+void nand_write(int block, int page)
+{
+	int i;
+	for (i = 0; i < 512; i ++)
+		nand_buffer[i] = i;
+
+	NF_WritePage(block, page, nand_buffer);
+}
+FINSH_FUNCTION_EXPORT_ALIAS(nand_write, write_page, write page[block/page]);
+
+void nand_erase(int block)
+{
+	NF_EraseBlock(block);
+}
+FINSH_FUNCTION_EXPORT_ALIAS(nand_erase, erase_block, erase block[block]);
+
+void nand_readoob(int block, int page)
+{
+	rt_kprintf("read oob on block %d, page %d\n", block, page);
+
+	NF_ReadPage(block, page, RT_NULL, (unsigned char*)nand_oob);
+	rt_kprintf("oob data:\n");
+	dump_mem(nand_oob, 16);
+}
+FINSH_FUNCTION_EXPORT_ALIAS(nand_readoob, readoob, read oob[block/page]);
+
+void nand_erase_chip()
+{
+	int i;
+	unsigned char id;
+	
+	NF_ReadID(&id);
+	rt_kprintf("id: %02x\n", id);
+
+	for (i = 0; i < 2048; i ++)
+	{
+		NF_EraseBlock(i);
+	}
+}
+FINSH_FUNCTION_EXPORT_ALIAS(nand_erase_chip, erase_chip, erase whole chip);
+#endif
diff --git a/bsp/fm3/mb9bf506r/nand.h b/bsp/fm3/mb9bf506r/nand.h
new file mode 100644
index 000000000..5a1f1467a
--- /dev/null
+++ b/bsp/fm3/mb9bf506r/nand.h
@@ -0,0 +1,57 @@
+/*
+ * File      : nand.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-05-25     Bernard      first version
+ */
+
+#ifndef __NAND_H__
+#define __NAND_H__
+
+#include <rtthread.h>
+
+#define IO_NF_PFR     FM3_GPIO->PFR3
+#define IO_NF_DDR     FM3_GPIO->DDR3
+#define IO_NF_PDOR    FM3_GPIO->PDOR3
+
+#define NF_EN         0x0008
+#define NF_DATA_DIR   0x0004
+
+#define EXT_BUS_BASE_ADDR    0x60000000
+#define EXT_CS7_OFFSET       0x0E000000
+#define EXT_CS7_SIZE         0x02000000
+
+#define NF_FLASH_BASE_ADDR   (EXT_BUS_BASE_ADDR+EXT_CS7_OFFSET)
+
+#define NF_ALE_OFFSET        0x00003000
+#define NF_ADDR_OFFSET       0x00002000
+#define NF_CMD_OFFSET        0x00001000
+#define NF_DATA_OFFSET       0x00000000   
+
+/* NAND command */
+#define NAND_CMD_READ0     0x00
+#define NAND_CMD_READ1     0x01
+#define NAND_CMD_PAGEPROG  0x10
+#define NAND_CMD_READOOB   0x50
+#define NAND_CMD_ERASE1    0x60
+#define NAND_CMD_STATUS    0x70
+#define NAND_CMD_SEQIN     0x80
+#define NAND_CMD_READID    0x90
+#define NAND_CMD_READID1   0x91
+#define NAND_CMD_ERASE2    0xd0
+#define NAND_CMD_RESET     0xff
+  
+#define FLASH_OK           0
+#define FLASH_NG           1
+
+/* nand flash device initialization */
+void rt_hw_nand_init(void);
+
+#endif
diff --git a/bsp/fm3/mb9bf506r/rtconfig.h b/bsp/fm3/mb9bf506r/rtconfig.h
index 5aea77508..942833704 100644
--- a/bsp/fm3/mb9bf506r/rtconfig.h
+++ b/bsp/fm3/mb9bf506r/rtconfig.h
@@ -3,7 +3,7 @@
 #define __RTTHREAD_CFG_H__
 
 /* RT_NAME_MAX*/
-#define RT_NAME_MAX		8
+#define RT_NAME_MAX		4
 
 /* RT_ALIGN_SIZE*/
 #define RT_ALIGN_SIZE	4
@@ -56,7 +56,7 @@
 #define RT_UART_RX_BUFFER_SIZE	64
 
 /* SECTION: Console options */
-//#define RT_TINY_SIZE
+/* #define RT_TINY_SIZE */
 #define RT_USING_CONSOLE
 /* the buffer size of console */
 #define RT_CONSOLEBUF_SIZE	128
@@ -67,54 +67,24 @@
 /* Using symbol table */
 #define FINSH_USING_SYMTAB
 #define FINSH_USING_DESCRIPTION
-#define FINSH_THREAD_STACK_SIZE 4096
+#define FINSH_THREAD_STACK_SIZE 1024
 
 /* SECTION: Device filesystem support */
 /* using DFS support */
-/* #define RT_USING_DFS */
-/* #define RT_USING_DFS_ELMFAT */
+#define RT_USING_DFS
+#define RT_USING_DFS_ELMFAT
 /* use long file name feature 			*/
-#define RT_DFS_ELM_USE_LFN			1
+/* #define RT_DFS_ELM_USE_LFN */
 /* the max number of file length 		*/
-#define RT_DFS_ELM_MAX_LFN		32
-/* #define RT_USING_DFS_YAFFS2 */
+#define RT_DFS_ELM_MAX_LFN			32
 /* #define RT_USING_DFS_UFFS */
 /* #define RT_USING_DFS_DEVFS */
 
-//#define RT_USING_DFS_NFS
-//#define RT_NFS_HOST_EXPORT		"192.168.1.5:/"
-
+/* the max number of mounted filesystem */
+#define DFS_FILESYSTEMS_MAX			2
+/* the max number of opened files 		*/
+#define DFS_FD_MAX					8
+/* using working directory */
 #define DFS_USING_WORKDIR
 
-/* the max number of mounted filesystem */
-#define DFS_FILESYSTEMS_MAX		4
-/* the max number of opened files 		*/
-#define DFS_FD_MAX					16
-/* the max number of cached sector 		*/
-#define DFS_CACHE_MAX_NUM   		4
-
-/* SECTION: RTGUI support */
-/* using RTGUI support */
-//#define RT_USING_RTGUI
-
-/* name length of RTGUI object */
-#define RTGUI_NAME_MAX		16
-/* support 16 weight font */
-//#define RTGUI_USING_FONT16
-/* support 12 weight font */
-#define RTGUI_USING_FONT12
-/* support Chinese font */
-//#define RTGUI_USING_FONTHZ
-/* use DFS as file interface */
-//#define RTGUI_USING_DFS_FILERW
-/* use font file as Chinese font */
-/* #define RTGUI_USING_HZ_FILE */
-/* use Chinese bitmap font */
-//#define RTGUI_USING_HZ_BMP
-/* use small size in RTGUI */
-//#define RTGUI_USING_SMALL_SIZE
-/* use mouse cursor */
-/* #define RTGUI_USING_MOUSE_CURSOR */
-#define RTGUI_DEFAULT_FONT_SIZE 12
-
 #endif
diff --git a/bsp/fm3/mb9bf506r/serial.c b/bsp/fm3/mb9bf506r/serial.c
index 5e510d037..c8e08ad47 100644
--- a/bsp/fm3/mb9bf506r/serial.c
+++ b/bsp/fm3/mb9bf506r/serial.c
@@ -5,12 +5,12 @@
  *
  * The license and distribution terms for this file may be
  * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ * http://www.rt-thread.org/license/LICENSE
  *
  * Change Logs:
  * Date           Author       Notes
  * 2006-03-13     Bernard      first version
- * 2009-04-20     yi.qiu      modified according bernard's stm32 version      	  	
+ * 2011-05-15     lgnq         modified according bernard's implementaion.      	  	
  */
 
 #include <rtthread.h>
@@ -32,7 +32,6 @@ static rt_err_t rt_serial_init (rt_device_t dev)
 
 	if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
 	{
-
 		if (dev->flag & RT_DEVICE_FLAG_INT_RX)
 		{
 			rt_memset(uart->int_rx->rx_buffer, 0, 
@@ -79,20 +78,39 @@ static void rt_serial_savechar(struct serial_device* uart, char ch)
 }
 
 static rt_err_t rt_serial_open(rt_device_t dev, rt_uint16_t oflag)
-{	
-	RT_ASSERT(dev != RT_NULL);
+{
+	struct serial_device* uart;
 	
+	RT_ASSERT(dev != RT_NULL);
+	uart = (struct serial_device*) dev->user_data;
+
+	if (dev->flag & RT_DEVICE_FLAG_INT_RX)
+	{
+		/* enable interrupt */
+		UART_ENABLE_IRQ(uart->rx_irq);
+	}
+
 	return RT_EOK;
 }
 
 static rt_err_t rt_serial_close(rt_device_t dev)
 {	
+	struct serial_device* uart;
+	
 	RT_ASSERT(dev != RT_NULL);
+	uart = (struct serial_device*) dev->user_data;
+
+	if (dev->flag & RT_DEVICE_FLAG_INT_RX)
+	{
+		/* disable interrupt */
+		UART_DISABLE_IRQ(uart->rx_irq);
+	}
 
 	return RT_EOK;
 }
 
-static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
+static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, 
+                                 rt_size_t size)
 {
 	rt_uint8_t* ptr;
 	rt_err_t err_code;
@@ -150,7 +168,8 @@ static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt
 	return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
 }
 
-static rt_size_t rt_serial_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
+static rt_size_t rt_serial_write (rt_device_t dev, rt_off_t pos, 
+                                  const void* buffer, rt_size_t size)
 {
 	rt_uint8_t* ptr;
 	rt_err_t err_code;
@@ -233,7 +252,8 @@ static rt_err_t rt_serial_control (rt_device_t dev, rt_uint8_t cmd, void *args)
 /*
  * serial register
  */
-rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial)
+rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, 
+                               rt_uint32_t flag, struct serial_device *serial)
 {
 	RT_ASSERT(device != RT_NULL);
 
@@ -246,12 +266,12 @@ rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t
 	device->read 		= rt_serial_read;
 	device->write 		= rt_serial_write;
 	device->control 	= rt_serial_control;
-	device->user_data		= serial;
+	device->user_data	= serial;
 
 	/* register a character device */
 	return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR | flag);
 }
-	
+
 /* ISR for serial interrupt */
 void rt_hw_serial_isr(rt_device_t device)
 {
@@ -280,4 +300,49 @@ void rt_hw_serial_isr(rt_device_t device)
 	}	
 }
 
+#ifdef RT_USING_UART2
+/* UART2 device driver structure */
+#define UART2	FM3_MFS2_UART
+struct serial_int_rx uart2_int_rx;
+struct serial_device uart2 =
+{
+	UART2,
+	MFS2RX_IRQn,
+	MFS2TX_IRQn,
+	&uart2_int_rx,
+	RT_NULL
+};
+struct rt_device uart2_device;
+
+void MFS2RX_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&uart2_device);
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+#endif
+
+void rt_hw_serial_init(void)
+{	
+#ifdef RT_USING_UART2
+	/* initialize UART2 */
+    /* Set Uart Ch2 Port, SIN2_1, SOT2_1 */
+    FM3_GPIO->PFR2 = FM3_GPIO->PFR2 | 0x0030;
+    FM3_GPIO->EPFR07 = FM3_GPIO->EPFR07 | 0x000a0000;
+
+	uart2.uart_device->SMR = SMR_MD_UART | SMR_SOE;;
+	uart2.uart_device->BGR = (40000000UL + (BPS/2))/BPS - 1;
+	uart2.uart_device->ESCR = ESCR_DATABITS_8;
+	uart2.uart_device->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
+
+	/* register UART2 device */
+	rt_hw_serial_register(&uart2_device, 
+		"uart2", 
+		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+		&uart2);
+#endif
+}
+
 /*@}*/
diff --git a/bsp/fm3/mb9bf506r/serial.h b/bsp/fm3/mb9bf506r/serial.h
index 8699754d3..5be2d53c2 100644
--- a/bsp/fm3/mb9bf506r/serial.h
+++ b/bsp/fm3/mb9bf506r/serial.h
@@ -1,3 +1,18 @@
+/*
+ * File      : serial.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2006-03-13     Bernard      first version
+ * 2011-05-15     lgnq         modified according bernard's implementaion.      	  	
+ */
+
 #ifndef __RT_HW_SERIAL_H__
 #define __RT_HW_SERIAL_H__
 
@@ -69,16 +84,16 @@ struct serial_int_tx
 struct serial_device
 {
 	FM3_MFS03_UART_TypeDef* uart_device;
-	
+	/* irq number */
+	IRQn_Type rx_irq, tx_irq;
+
 	/* rx structure */
 	struct serial_int_rx* int_rx;
-
 	/* tx structure */
 	struct serial_int_tx* int_tx;
 };
 
-rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial);
-
 void rt_hw_serial_isr(rt_device_t device);
+void rt_hw_serial_init(void);
 
 #endif
diff --git a/bsp/fm3/mb9bf506r/startup.c b/bsp/fm3/mb9bf506r/startup.c
index b436cdd52..36bc107ae 100644
--- a/bsp/fm3/mb9bf506r/startup.c
+++ b/bsp/fm3/mb9bf506r/startup.c
@@ -58,10 +58,6 @@ void rtthread_startup(void)
 
 	/* init tick */
 	rt_system_tick_init();
-
-	/* init kernel object */
-	rt_system_object_init();
-
 	/* init timer system */
 	rt_system_timer_init();
 
@@ -79,27 +75,12 @@ void rtthread_startup(void)
 	/* init scheduler system */
 	rt_system_scheduler_init();
 
-#ifdef RT_USING_DEVICE
-	/* register uart0 */
-	rt_hw_serial_register(&uart0_device, "uart0",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart0);
-
-	/* register uart2, used for RTI debug */
-	rt_hw_serial_register(&uart2_device, "uart2",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart2);
-	
 #ifdef RT_USING_DFS
 #ifdef RT_USING_DFS_UFFS
 	rt_hw_nand_init();
 #endif
 #endif
 
-	/*init all registed devices */
-	rt_device_init_all();
-#endif
-
 	/* init application */
 	rt_application_init();
 
@@ -110,7 +91,7 @@ void rtthread_startup(void)
 	finsh_set_device("uart2");
 #endif
 #endif
-    
+
     /* init timer thread */
     rt_system_timer_thread_init();
 
@@ -126,10 +107,8 @@ void rtthread_startup(void)
 
 int main(void)
 {
-	rt_uint32_t UNUSED level;
-
 	/* disable interrupt first */
-	level = rt_hw_interrupt_disable();
+	rt_hw_interrupt_disable();
 
 	/* init system setting */
 	SystemInit();
diff --git a/libcpu/arm/fm3/start_iar.S b/libcpu/arm/fm3/start_iar.S
index e3b4f0864..7d2b06500 100644
--- a/libcpu/arm/fm3/start_iar.S
+++ b/libcpu/arm/fm3/start_iar.S
@@ -52,7 +52,7 @@
     IMPORT  rt_hw_pend_sv
     IMPORT  rt_hw_timer_handler
 #ifdef RT_USING_UART2   
-    IMPORT  rt_hw_uart2_rx_handler
+    IMPORT  MFS2RX_IRQHandler
 #endif
     PUBLIC  __low_level_init
 
@@ -113,7 +113,7 @@ __vector_table
         DCD     EXTI3_IRQHandler          ; EXTI Line 3
         DCD     EXTI4_IRQHandler          ; EXTI Line 4
 #ifdef RT_USING_UART2        
-        DCD     rt_hw_uart2_rx_handler
+        DCD     MFS2RX_IRQHandler
 #else
         DCD     DMA1_Channel1_IRQHandler  ; DMA1 Channel 1
 #endif