diff --git a/bsp/simulator/applications/dfs_win32.c b/bsp/simulator/applications/dfs_win32.c
index 1ed671f78..605d6533b 100644
--- a/bsp/simulator/applications/dfs_win32.c
+++ b/bsp/simulator/applications/dfs_win32.c
@@ -80,7 +80,6 @@ static int win32_result_to_dfs(DWORD res)
     /* unknown error */
     rt_kprintf("dfs win32 error not supported yet: %d\n", res);
     return -1;
-
 }
 
 static int dfs_win32_mount(
diff --git a/bsp/simulator/applications/startup.c b/bsp/simulator/applications/startup.c
index 2056d5afb..fd46980b4 100644
--- a/bsp/simulator/applications/startup.c
+++ b/bsp/simulator/applications/startup.c
@@ -52,7 +52,7 @@ void rtthread_startup(void)
 
 #ifdef RT_USING_HEAP
     /* init memory system */
-    rt_system_heap_init((void *)heap, (void *)&heap[HEAP_SIZE - 1]);
+    rt_system_heap_init((void *)heap, (void *)&heap[RT_HEAP_SIZE - 1]);
 #endif
 
     /* init scheduler system */
diff --git a/bsp/simulator/drivers/board.c b/bsp/simulator/drivers/board.c
index d85f5945f..079071cb6 100644
--- a/bsp/simulator/drivers/board.c
+++ b/bsp/simulator/drivers/board.c
@@ -26,7 +26,7 @@ rt_uint8_t *heap;
 rt_uint8_t *rt_hw_sram_init(void)
 {
     rt_uint8_t *heap;
-    heap = malloc(HEAP_SIZE);
+    heap = malloc(RT_HEAP_SIZE);
     if (heap == RT_NULL)
     {
         rt_kprintf("there is no memory in pc.");
diff --git a/bsp/simulator/drivers/sst25vfxx_mtd_sim.c b/bsp/simulator/drivers/sst25vfxx_mtd_sim.c
index 315cdf665..2c1e5a9dc 100644
--- a/bsp/simulator/drivers/sst25vfxx_mtd_sim.c
+++ b/bsp/simulator/drivers/sst25vfxx_mtd_sim.c
@@ -90,8 +90,7 @@ static int sst25vfxx_write(struct rt_mtd_nor_device *device, rt_off_t position,
 }
 
 static char block_buffer[BLOCK_SIZE];
-
-static rt_err_t sst25vfxx_erase_block(struct rt_mtd_nor_device *device, rt_uint32_t block)
+static rt_err_t sst25vfxx_erase_block(struct rt_mtd_nor_device *device, rt_off_t offset, rt_uint32_t length)
 {
     struct sst25_mtd *sst25;
     int result;
@@ -103,7 +102,7 @@ static rt_err_t sst25vfxx_erase_block(struct rt_mtd_nor_device *device, rt_uint3
     rt_mutex_take(&flash_lock, RT_WAITING_FOREVER);
 
     memset(block_buffer, 0xFF, BLOCK_SIZE);
-    fseek(sst25->file, block, SEEK_SET);
+    fseek(sst25->file, offset, SEEK_SET);
 
     result = fwrite(block_buffer, BLOCK_SIZE, 1, sst25->file);
     if (result < 0)
@@ -186,7 +185,7 @@ rt_err_t sst25vfxx_mtd_init(const char *nor_name,
     sst25->file = fopen(NOR_SIM, "rb+");
     if (sst25->file == NULL)
     {
-        int i;
+        rt_uint32_t i;
         /* create a file to simulate nor */
         sst25->file = fopen(NOR_SIM, "wb+");
 
@@ -216,10 +215,10 @@ void nor_erase(void)
     rt_uint32_t index;
     struct rt_mtd_nor_device *mtd;
 
-    mtd = SST25_MTD(&_sst25_mtd);
+    mtd = RT_MTD_NOR_DEVICE(&_sst25_mtd);
     for (index = mtd->block_start; index < mtd->block_end; index ++)
     {
-        sst25vfxx_erase_block(mtd, index * mtd->block_size);
+        sst25vfxx_erase_block(mtd, index * mtd->block_size, BLOCK_SIZE);
     }
 }
 FINSH_FUNCTION_EXPORT(nor_erase, erase all block in SPI flash);
diff --git a/bsp/simulator/rtconfig.h b/bsp/simulator/rtconfig.h
index ef5a43ea2..38ea44bee 100644
--- a/bsp/simulator/rtconfig.h
+++ b/bsp/simulator/rtconfig.h
@@ -9,7 +9,7 @@
 #define NORESOURCE  //RT_VESRION in winuser.h
 #define _CRT_ERRNO_DEFINED  //errno macro redefinition
 
-#define HEAP_SIZE   (1024*1024*2)
+#define RT_HEAP_SIZE   (1024*1024*2)
 
 /* disable some warning in MSC */
 #pragma warning(disable:4273)	/* to ignore: warning C4273: inconsistent dll linkage */
diff --git a/bsp/simulator/rtgui_demo/snake/snake_gui.c b/bsp/simulator/rtgui_demo/snake/snake_gui.c
index e369fecca..c25e94c4e 100644
--- a/bsp/simulator/rtgui_demo/snake/snake_gui.c
+++ b/bsp/simulator/rtgui_demo/snake/snake_gui.c
@@ -17,7 +17,6 @@
 #define SNAKE_HEAD_COLOR    RTGUI_RGB(180, 70, 130)
 #define BACKGROUND_COLOR    RTGUI_RGB(153, 153, 0)
 #define FOOD_COLOR          RTGUI_RGB(128, 0, 0)
-#define min(a, b)           ((a) < (b) ? (a) : (b))
 
 static rtgui_timer_t *timer;
 static rt_size_t room_size_x, room_size_y;
@@ -153,7 +152,7 @@ static void snake_draw(struct rtgui_widget *widget)
 
     /* draw snake. */
     {
-        rt_uint32_t x, y;
+        rt_int32_t x, y;
         rt_bool_t first_node = RT_TRUE;
 
         for (y = 0; y < map->height; y++)