diff --git a/bsp/stm32f7-disco/applications/application.c b/bsp/stm32f7-disco/applications/application.c
index e1dafdf5b25b91466adf1127671c91dcde585cda..2bf527c90b2537d43c6d8a4089a70a8801be6d1a 100644
--- a/bsp/stm32f7-disco/applications/application.c
+++ b/bsp/stm32f7-disco/applications/application.c
@@ -24,14 +24,14 @@
  */
 
 #include <rtthread.h>
-#include <components.h>
 
 void rt_init_thread_entry(void *parameter)
 {
-    rt_components_init();
+    //rt_components_init();
 }
 
-int rt_application_init()
+//int rt_application_init()
+int main(void)
 {
     rt_thread_t tid;
 
diff --git a/bsp/stm32f7-disco/applications/startup.c b/bsp/stm32f7-disco/applications/startup.c
deleted file mode 100644
index 628a805042092a63b532f4b7a2bd270a84ffee5d..0000000000000000000000000000000000000000
--- a/bsp/stm32f7-disco/applications/startup.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * File      : startup.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2015, RT-Thread Development Team
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date           Author       Notes
- * 2006-08-31     Bernard      first implementation
- * 2015-08-01     xiaonong     modify for STM32F7 version
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-#include "board.h"
-
-#ifdef RT_USING_EXT_SDRAM
-#include "drv_sdram.h"
-#include "sram.h"
-#endif
-
-/**
- * @addtogroup STM32
- */
-
-/*@{*/
-
-extern int  rt_application_init(void);
-
-#ifdef USE_FULL_ASSERT
-/**
-* @brief  assert_failed
-*         Reports the name of the source file and the source line number
-*         where the assert_param error has occurred.
-* @param  File: pointer to the source file name
-* @param  Line: assert_param error line source number
-* @retval None
-*/
-void assert_failed(uint8_t* file, uint32_t line)
-{
-  /* User can add his own implementation to report the file name and line
-  number,ex: printf("Wrong parameters value: file %s on line %d\r\n", 
-  file, line) */
-   rt_kprintf("\n\r Wrong parameter value detected on\r\n");
-   rt_kprintf("       file  %s\r\n", file);
-   rt_kprintf("       line  %d\r\n", line);
-
-  /* Infinite loop */
-  while (1)
-  {}
-}
-#endif
-
-/**
- * This function will startup RT-Thread RTOS.
- */
-void rtthread_startup(void)
-{
-    /* init board */
-    rt_hw_board_init();
-
-    /* show version */
-    rt_show_version();
-
-    /* init tick */
-    rt_system_tick_init();
-
-    /* init kernel object */
-    rt_system_object_init();
-
-    /* init timer system */
-    rt_system_timer_init();
-
-#ifdef RT_USING_EXT_SDRAM
-    sdram_hw_init();
-    rt_system_heap_init((void*)EXT_SDRAM_BEGIN, (void*)EXT_SDRAM_END);
-    sram_init();
-#else
-    rt_system_heap_init((void*)HEAP_BEGIN, (void*)HEAP_END);
-#endif
-
-    /* init scheduler system */
-    rt_system_scheduler_init();
-
-    /* init application */
-    rt_application_init();
-
-    /* init timer thread */
-    rt_system_timer_thread_init();
-
-    /* init idle thread */
-    rt_thread_idle_init();
-
-    /* start scheduler */
-    rt_system_scheduler_start();
-
-    /* never reach here */
-    return ;
-}
-
-int main(void)
-{
-    /* disable interrupt first */
-    rt_hw_interrupt_disable();
-
-    /* startup RT-Thread RTOS */
-    rtthread_startup();
-
-    return 0;
-}
-
-/*@}*/
diff --git a/bsp/stm32f7-disco/drivers/board.c b/bsp/stm32f7-disco/drivers/board.c
index 734ecf2094d5783e93d36973957e6198072a202c..0553920a4706d3d168e64622cc995c0613f5e01e 100644
--- a/bsp/stm32f7-disco/drivers/board.c
+++ b/bsp/stm32f7-disco/drivers/board.c
@@ -22,13 +22,10 @@
  * 2009-01-05     Bernard      first implementation
  */
 
-#include <rthw.h>
 #include <rtthread.h>
-#include <components.h>
-
 #include "board.h"
-#include "drv_usart.h"
-#include "drv_mpu.h"
+#include "sram.h"
+
 
 /**
  * @addtogroup STM32
@@ -70,11 +67,11 @@ static void SystemClock_Config(void)
     RCC_OscInitStruct.PLL.PLLN = 400;
     RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
     RCC_OscInitStruct.PLL.PLLQ = 8;
-    
+
     ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
     if(ret != HAL_OK)
     {
-        while(1) { ; }
+        while (1) { ; }
     }
 
     ret = HAL_PWREx_EnableOverDrive();
@@ -85,7 +82,8 @@ static void SystemClock_Config(void)
 
     /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
        clocks dividers */
-    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
+    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK |\
+                                   RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
     RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
@@ -167,7 +165,7 @@ void HAL_ResumeTick(void)
 void rt_hw_board_init()
 {
     /* Configure the MPU attributes as Write Through */
-    mpu_init();
+    //mpu_init();
 
     /* Enable the CPU Cache */
     CPU_CACHE_Enable();
@@ -186,7 +184,16 @@ void rt_hw_board_init()
     /* set pend exception priority */
     NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
 
+#ifdef RT_USING_COMPONENTS_INIT
     rt_components_board_init();
+#endif
+
+#ifdef RT_USING_EXT_SDRAM
+    rt_system_heap_init((void*)EXT_SDRAM_BEGIN, (void*)EXT_SDRAM_END);
+    sram_init();
+#else
+    rt_system_heap_init((void*)HEAP_BEGIN, (void*)HEAP_END);
+#endif
 
 #ifdef RT_USING_CONSOLE
     rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
diff --git a/bsp/stm32f7-disco/drivers/board.h b/bsp/stm32f7-disco/drivers/board.h
index d4aebe06d6eb5443d394ab3d6e224304507e17ee..8d1e9f37397b1c0fc41e57944fddc82349fe7bb0 100644
--- a/bsp/stm32f7-disco/drivers/board.h
+++ b/bsp/stm32f7-disco/drivers/board.h
@@ -31,8 +31,8 @@
 // <e>Use external SDRAM memory on the board
 //  <o>Begin Address of External SDRAM
 #define EXT_SDRAM_BEGIN    0xC0000000
+//  <o>Size of External SDRAM
 #define EXT_SDRAM_SIZE     (0x800000)
-//  <o>End Address of External SDRAM
 #define EXT_SDRAM_END      (EXT_SDRAM_BEGIN + EXT_SDRAM_SIZE)
 // </e>
 
diff --git a/bsp/stm32f7-disco/drivers/drv_mpu.c b/bsp/stm32f7-disco/drivers/drv_mpu.c
index 4cab4d22818388cf4953920426dace65f6831ea9..630e48e2d2f62a76ff0432e0e0ba65ba5751e181 100644
--- a/bsp/stm32f7-disco/drivers/drv_mpu.c
+++ b/bsp/stm32f7-disco/drivers/drv_mpu.c
@@ -23,9 +23,9 @@
  */ 
 
 #include "drv_mpu.h"
-
-
-void mpu_init(void)
+#include <rtthread.h>
+#include "stm32f7xx.h"
+int mpu_init(void)
 {
   MPU_Region_InitTypeDef MPU_InitStruct;
   
@@ -79,5 +79,6 @@ void mpu_init(void)
     
   /* Enable the MPU */
   HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
+	return 0;
 }
-
+INIT_BOARD_EXPORT(mpu_init);
diff --git a/bsp/stm32f7-disco/drivers/drv_mpu.h b/bsp/stm32f7-disco/drivers/drv_mpu.h
index 707adfc2ef4286e2479a5d2403dd2e3d6f3b2eb3..9baf74b0d7330a42e36b7bede262eb902efac546 100644
--- a/bsp/stm32f7-disco/drivers/drv_mpu.h
+++ b/bsp/stm32f7-disco/drivers/drv_mpu.h
@@ -1,9 +1,9 @@
 #ifndef __DRV_MPU_H
 #define __DRV_MPU_H
-#include "stm32f7xx.h"
+
 
 /* Initialize Cortex M   MPU */
-void mpu_init(void);
+int mpu_init(void);
 
 
 #endif
diff --git a/bsp/stm32f7-disco/drivers/drv_sdram.c b/bsp/stm32f7-disco/drivers/drv_sdram.c
index 4b58e21d01673880cefe09979c74d930bd8072b7..303bd3b9286f5185f8a73722adbf9b5dbfcd3d56 100644
--- a/bsp/stm32f7-disco/drivers/drv_sdram.c
+++ b/bsp/stm32f7-disco/drivers/drv_sdram.c
@@ -362,3 +362,9 @@ void SDRAM_DMA_IRQHandler(void)
 {
   HAL_DMA_IRQHandler(sdramHandle.hdma); 
 }
+
+static int rt_sdram_hw_init(void)
+{
+    return (int)sdram_hw_init();
+}
+INIT_BOARD_EXPORT(rt_sdram_hw_init);
diff --git a/bsp/stm32f7-disco/rtconfig.h b/bsp/stm32f7-disco/rtconfig.h
index bd0aaed397c1d039e9a35d2f510a27b6b7eff4fc..f599858171479d351e12d62428553a1fa87c1ff0 100644
--- a/bsp/stm32f7-disco/rtconfig.h
+++ b/bsp/stm32f7-disco/rtconfig.h
@@ -227,4 +227,7 @@
 /* enable SDRAM */
 #define RT_USING_EXT_SDRAM
 
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+
 #endif
diff --git a/bsp/stm32f7-disco/rtconfig.py b/bsp/stm32f7-disco/rtconfig.py
index 91ef8db8b30185eb68e7a5371304d7f2633f68ce..8fd7dd90942dcd0f4de844363d3180e839dc3c33 100644
--- a/bsp/stm32f7-disco/rtconfig.py
+++ b/bsp/stm32f7-disco/rtconfig.py
@@ -45,7 +45,7 @@ if PLATFORM == 'gcc':
     STRIP = PREFIX + 'strip'
 
     DEVICE = '  -mcpu=cortex-m7 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -g -Wall -DSTM32F756xx -DUSE_HAL_DRIVER -D__ASSEMBLY__ -D__FPU_USED'
+    CFLAGS = DEVICE + ' -g -Wall -DSTM32F756xx -DUSE_HAL_DRIVER -D__ASSEMBLY__ -D__FPU_USED -eentry'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -lm -lgcc -lc' + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread_stm32f7xx.map,-cref,-u,Reset_Handler -T rtthread-stm32f7xx.ld'