diff --git a/bsp/stm32f7-disco/applications/application.c b/bsp/stm32f7-disco/applications/application.c
index c8491a53f9b2d60a026ecfee68d4631f27354a0e..e1dafdf5b25b91466adf1127671c91dcde585cda 100644
--- a/bsp/stm32f7-disco/applications/application.c
+++ b/bsp/stm32f7-disco/applications/application.c
@@ -26,35 +26,9 @@
 #include <rtthread.h>
 #include <components.h>
 
-#include "drv_led.h"
-
-static void led_thread_entry(void *parameter)
-{
-
-    led_hw_init();
-
-    while (1)
-    {
-        led_on();
-        rt_thread_delay(RT_TICK_PER_SECOND);
-        led_off();
-        rt_thread_delay(RT_TICK_PER_SECOND);
-    }
-}
-
 void rt_init_thread_entry(void *parameter)
 {
-
-    rt_thread_t tid;
-
     rt_components_init();
-
-    tid = rt_thread_create("led",
-                           led_thread_entry, RT_NULL,
-                           512, 12, 5);
-
-    if (tid != RT_NULL)
-        rt_thread_startup(tid);
 }
 
 int rt_application_init()
@@ -64,11 +38,7 @@ int rt_application_init()
     tid = rt_thread_create("init",
                            rt_init_thread_entry, RT_NULL,
                            2048, RT_THREAD_PRIORITY_MAX / 3, 20);
-
-    if (tid != RT_NULL)
-        rt_thread_startup(tid);
+    if (tid != RT_NULL) rt_thread_startup(tid);
 
     return 0;
 }
-
-/*@}*/
diff --git a/bsp/stm32f7-disco/drivers/drv_led.c b/bsp/stm32f7-disco/drivers/drv_led.c
index a58c5f3b6bb32961d12f665ca8ae1ca23d42d846..be86615b2f9ea4fa9541651b31ee29d2453636c1 100644
--- a/bsp/stm32f7-disco/drivers/drv_led.c
+++ b/bsp/stm32f7-disco/drivers/drv_led.c
@@ -21,9 +21,22 @@
  * Date           Author       Notes
  * 2015-08-01     xiaonong     the first version
  */
-
+#include <rtthread.h>
 #include <board.h>
 
+#include "drv_led.h"
+
+static void led_thread_entry(void *parameter)
+{
+    while (1)
+    {
+        led_on();
+        rt_thread_delay(RT_TICK_PER_SECOND);
+        led_off();
+        rt_thread_delay(RT_TICK_PER_SECOND);
+    }
+}
+
 int led_hw_init(void)
 {
    GPIO_InitTypeDef GPIO_InitStruct;
@@ -39,5 +52,19 @@ int led_hw_init(void)
   HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
   return 0;
 }
+INIT_BOARD_EXPORT(led_hw_init);
 
+int led_init(void)
+{
+    rt_thread_t tid;
+
+    tid = rt_thread_create("led",
+                           led_thread_entry, RT_NULL,
+                           512, 12, 5);
 
+    if (tid != RT_NULL)
+        rt_thread_startup(tid);
+
+    return 0;
+}
+INIT_APP_EXPORT(led_init);
diff --git a/bsp/stm32f7-disco/drivers/stm32f7xx_it.c b/bsp/stm32f7-disco/drivers/stm32f7xx_it.c
index aa3baef2f225b6935c1fadddc314fb40b0f8ade0..899d4da11d3ef75f74303c3938b1a5c54e78ab18 100644
--- a/bsp/stm32f7-disco/drivers/stm32f7xx_it.c
+++ b/bsp/stm32f7-disco/drivers/stm32f7xx_it.c
@@ -69,19 +69,6 @@ void NMI_Handler(void)
 {
 }
 
-/**
-  * @brief  This function handles Memory Manage exception.
-  * @param  None
-  * @retval None
-  */
-void MemManage_Handler(void)
-{
-  /* Go to infinite loop when Memory Manage exception occurs */
-  while (1)
-  {
-  }
-}
-
 /**
   * @brief  This function handles Bus Fault exception.
   * @param  None
diff --git a/bsp/stm32f7-disco/rtconfig.h b/bsp/stm32f7-disco/rtconfig.h
index 98c2599d20f85bd4c35125d9db149c77cb319e0d..bd0aaed397c1d039e9a35d2f510a27b6b7eff4fc 100644
--- a/bsp/stm32f7-disco/rtconfig.h
+++ b/bsp/stm32f7-disco/rtconfig.h
@@ -14,7 +14,7 @@
 // <item description="256">256</item>
 // </integer>
 #define RT_THREAD_PRIORITY_MAX	32
-// <integer name="RT_TICK_PER_SECOND" description="OS tick per second" default="100" />
+// <integer name="RT_TICK_PER_SECOND" description="OS tick per second" default="1000" />
 #define RT_TICK_PER_SECOND	1000
 // <integer name="IDLE_THREAD_STACK_SIZE" description="The stack size of idle thread" default="512" />
 #define IDLE_THREAD_STACK_SIZE	512
@@ -141,16 +141,16 @@
 // <item description="LFN with dynamic LFN working buffer on the heap">3</item>
 // </integer>
 #define RT_DFS_ELM_USE_LFN	3
-// <integer name="RT_DFS_ELM_CODE_PAGE" description="OEM code page" default="936">
-#define RT_DFS_ELM_CODE_PAGE	936
+// <integer name="RT_DFS_ELM_CODE_PAGE" description="OEM code page" default="437">
+#define RT_DFS_ELM_CODE_PAGE	437
 // <bool name="RT_DFS_ELM_CODE_PAGE_FILE" description="Using OEM code page file" default="false" />
-#define RT_DFS_ELM_CODE_PAGE_FILE
+// #define RT_DFS_ELM_CODE_PAGE_FILE
 // <integer name="RT_DFS_ELM_MAX_LFN" description="Maximal size of file name length" default="256" />
 #define RT_DFS_ELM_MAX_LFN	256
 // <integer name="RT_DFS_ELM_MAX_SECTOR_SIZE" description="Maximal size of sector" default="512" />
 #define RT_DFS_ELM_MAX_SECTOR_SIZE  4096
 // <bool name="RT_DFS_ELM_USE_ERASE" description="Enable erase feature for flash" default="true" />
-#define RT_DFS_ELM_USE_ERASE
+// #define RT_DFS_ELM_USE_ERASE
 // <bool name="RT_USING_DFS_YAFFS2" description="Using YAFFS2" default="false" />
 // #define RT_USING_DFS_YAFFS2
 // <bool name="RT_USING_DFS_UFFS" description="Using UFFS" default="false" />
@@ -160,7 +160,7 @@
 // <bool name="RT_USING_DFS_ROMFS" description="Using ROMFS" default="false" />
 //#define RT_USING_DFS_ROMFS
 // <bool name="RT_USING_DFS_NFS" description="Using NFS" default="false" />
-#define RT_USING_DFS_NFS
+// #define RT_USING_DFS_NFS
 // <string name="RT_NFS_HOST_EXPORT" description="The exported NFS host path" default="192.168.1.10:/" />
 #define RT_NFS_HOST_EXPORT	"192.168.137.1:/"
 // </section>
@@ -223,6 +223,7 @@
 // </section>
 
 // </RDTConfigurator>
+
 /* enable SDRAM */
 #define RT_USING_EXT_SDRAM
 
diff --git a/libcpu/arm/cortex-m7/context_rvds.S b/libcpu/arm/cortex-m7/context_rvds.S
index fa7a1c90f8de443f5c2464a1d1514f02115ba0c6..53a3756783bcfb3c59c5c9a95e050cc2b840d264 100644
--- a/libcpu/arm/cortex-m7/context_rvds.S
+++ b/libcpu/arm/cortex-m7/context_rvds.S
@@ -221,7 +221,9 @@ rt_hw_interrupt_thread_switch PROC
 
     IMPORT rt_hw_hard_fault_exception
     EXPORT HardFault_Handler
+    EXPORT MemManage_Handler
 HardFault_Handler    PROC
+MemManage_Handler
 
     ; get current context
     MRS     r0, psp                 ; get fault thread stack pointer