diff --git a/bsp/stm32_radio/application.c b/bsp/stm32_radio/application.c
index 8f2544f5741b1208a2cb4cef2c3c18cace6e7c1a..65d9cb744539317ffd166afc4b28c54212ed86fb 100644
--- a/bsp/stm32_radio/application.c
+++ b/bsp/stm32_radio/application.c
@@ -57,17 +57,17 @@ void rt_init_thread_entry(void *parameter)
         /* init the elm FAT filesystam*/
         elm_init();
 
-        /* mount sd card fat partition 1 as root directory */
-        if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
-            rt_kprintf("File System initialized!\n");
-        else
-            rt_kprintf("File System init failed!\n");
-
-		/* mount spi flash fat as resource directory */
-		if (dfs_mount("spi0", "/flash", "elm", 0, 0) == 0)
+		/* mount spi flash fat as root directory */
+		if (dfs_mount("spi0", "/", "elm", 0, 0) == 0)
 			rt_kprintf("SPI File System initialized!\n");
 		else
 			rt_kprintf("SPI File System init failed!\n");
+
+        /* mount sd card fat partition 1 as SD directory */
+        if (dfs_mount("sd0", "/SD", "elm", 0, 0) == 0)
+            rt_kprintf("File System initialized!\n");
+        else
+            rt_kprintf("File System init failed!\n");
     }
 #endif
 
diff --git a/bsp/stm32_radio/dm9000.c b/bsp/stm32_radio/dm9000.c
index fb26bf1910c03b0e26f1d2911e4fafd5c974b8a0..7d577d1543f7bded14898104383b6b70813597be 100644
--- a/bsp/stm32_radio/dm9000.c
+++ b/bsp/stm32_radio/dm9000.c
@@ -541,7 +541,7 @@ struct pbuf *rt_dm9000_rx(rt_device_t dev)
             }
 
             /* it issues an error, release pbuf */
-            pbuf_free(p);
+            if (p != RT_NULL) pbuf_free(p);
             p = RT_NULL;
         }
     }
diff --git a/bsp/stm32_radio/player_ui.c b/bsp/stm32_radio/player_ui.c
index 7034ebfa6dce9199aa96464feef32a0b7a7cea40..ad6ad51acc97d8cf79074287b67cda56a39f0d2c 100644
--- a/bsp/stm32_radio/player_ui.c
+++ b/bsp/stm32_radio/player_ui.c
@@ -945,7 +945,7 @@ void player_notify_stop()
 void player_ui_init()
 {
     player_ui_tid = rt_thread_create("ply_ui", player_entry, RT_NULL,
-                                     0x800, 25, 5);
+                                     4096, 25, 5);
     if (player_ui_tid != RT_NULL)
         rt_thread_startup(player_ui_tid);
 }
diff --git a/bsp/stm32_radio/sdcard.c b/bsp/stm32_radio/sdcard.c
index c58f04a5f77438a24038988726e0daf11de9812e..415dc1867726d305231b4f029547d415b7761518 100644
--- a/bsp/stm32_radio/sdcard.c
+++ b/bsp/stm32_radio/sdcard.c
@@ -78,7 +78,7 @@
 #define SD_CARD_LOCKED                  ((uint32_t)0x02000000)
 #define SD_CARD_PROGRAMMING             ((uint32_t)0x00000007)
 #define SD_CARD_RECEIVING               ((uint32_t)0x00000006)
-#define SD_DATATIMEOUT                  ((uint32_t)0x000FFFFF)
+#define SD_DATATIMEOUT                  ((uint32_t)0xFFFFFFFF)
 #define SD_0TO7BITS                     ((uint32_t)0x000000FF)
 #define SD_8TO15BITS                    ((uint32_t)0x0000FF00)
 #define SD_16TO23BITS                   ((uint32_t)0x00FF0000)
diff --git a/filesystem/dfs/src/dfs_raw.c b/filesystem/dfs/src/dfs_raw.c
index ec0bce6820334752936737feb9a358db78f18451..c96b4089bd09832a876850c2d23ed25ad81ce6a0 100644
--- a/filesystem/dfs/src/dfs_raw.c
+++ b/filesystem/dfs/src/dfs_raw.c
@@ -18,6 +18,8 @@
 
 extern struct dfs_fd fd_table[];
 
+#define NO_WORKING_DIR	"system does not support working dir\n"
+
 /*
 +------------------------------------------------------------------------------
 | Function    : fd_new
@@ -150,9 +152,7 @@ int dfile_raw_open(struct dfs_fd* fd, const char *path, int flags)
 		build_fullpath(working_directory, path, fullpath);
 		dfs_unlock();
 #else
-#ifdef RT_USING_FINSH
-		rt_kprintf("bad filename");
-#endif
+		rt_kprintf(NO_WORKING_DIR);
 		return -1;
 #endif
 	}
@@ -367,9 +367,7 @@ int dfile_raw_unlink(const char *path)
 		build_fullpath(working_directory, path, fullpath);
 		dfs_unlock();
 #else
-#ifdef RT_USING_FINSH
-		rt_kprintf("bad filename");
-#endif
+		rt_kprintf(NO_WORKING_DIR);
 		return -1;
 #endif
 	}
@@ -476,9 +474,7 @@ int dfile_raw_stat(const char *path, struct dfs_stat *buf)
 		build_fullpath(working_directory, path, fullpath);
 		dfs_unlock();
 #else
-#ifdef RT_USING_FINSH
-		rt_kprintf("not support working directory, bad filename\n");
-#endif
+		rt_kprintf(NO_WORKING_DIR);
 		return -1;
 #endif
 	}
@@ -491,9 +487,24 @@ int dfile_raw_stat(const char *path, struct dfs_stat *buf)
 
 	fspathlen = strlen(fs->path);
 	rt_memset(real_path, 0, sizeof(real_path));
-	if (*(fullpath + fspathlen) != '/') strcpy(real_path, "/");
+	if (*(fullpath + fspathlen) != '/') real_path[0] = '/';
 	strcat(real_path, fullpath + fspathlen);
 
+	if (real_path[0] == '/' && real_path[1] == '\0')
+	{
+		/* it's the root directory */
+		buf->st_dev   = 0;
+
+		buf->st_mode = DFS_S_IRUSR | DFS_S_IRGRP | DFS_S_IROTH |
+			DFS_S_IWUSR | DFS_S_IWGRP | DFS_S_IWOTH;
+		buf->st_mode |= DFS_S_IFDIR | DFS_S_IXUSR | DFS_S_IXGRP | DFS_S_IXOTH;
+
+		buf->st_size  = 0;
+		buf->st_mtime = 0;
+		buf->st_blksize = 512;
+		return DFS_STATUS_OK;
+	}
+	
 	if (fs->ops->stat == RT_NULL)
 	{
 		dfs_log(DFS_DEBUG_ERROR, ("the filesystem didn't implement this function"));
@@ -535,7 +546,7 @@ int dfile_raw_rename(const char* oldpath, const char* newpath)
 		build_fullpath(working_directory, oldpath, oldfullpath);
 		dfs_unlock();
 #else
-		rt_kprintf("bad filename\n");
+		rt_kprintf(NO_WORKING_DIR);
 		return -1;
 #endif
 	}
@@ -549,7 +560,7 @@ int dfile_raw_rename(const char* oldpath, const char* newpath)
 		build_fullpath(working_directory, newpath, newfullpath);
 		dfs_unlock();
 #else
-		rt_kprintf("bad filename");
+		rt_kprintf(NO_WORKING_DIR);
 		return -1;
 #endif
 	}
@@ -597,11 +608,12 @@ void ls(const char* pathname)
 			if ( length > 0 ) 
 			{
 				rt_memset(&stat, 0, sizeof(struct dfs_stat));
-				
+
 				/* build full path for each file */
-				strncpy(fullpath, pathname, 256);
-				strcat(fullpath, "/");
-				strcat(fullpath, dirent.d_name);
+				if (pathname[strlen(pathname) - 1] != '/')
+					rt_snprintf(fullpath, sizeof(fullpath), "%s%c%s", pathname, '/', dirent.d_name);
+				else
+					rt_snprintf(fullpath, sizeof(fullpath), "%s%s", pathname, dirent.d_name);
 				
 				dfile_raw_stat(fullpath, &stat);
 				if ( stat.st_mode & DFS_S_IFDIR )
@@ -624,7 +636,7 @@ void ls(const char* pathname)
 }
 FINSH_FUNCTION_EXPORT(ls, list directory contents)
 
-void _mkdir(const char* pathname)
+static void mkdir(const char* pathname)
 {
 	/* make a new directory */
 	if (dfile_raw_open(&fd, pathname, DFS_O_DIRECTORY | DFS_O_CREAT) == 0)
@@ -633,7 +645,7 @@ void _mkdir(const char* pathname)
 	}
 	else rt_kprintf("Can't mkdir %s\n", pathname);
 }
-FINSH_FUNCTION_EXPORT(_mkdir, make a directory)
+FINSH_FUNCTION_EXPORT(mkdir, make a directory)
 
 void rm(const char* filename)
 {
diff --git a/rtgui/server/topwin.c b/rtgui/server/topwin.c
index abd72661196b08fd175507f858f2a2671e98ac64..ac807e26bcd0381c5f4d9c27a363c4b09c4f5777 100644
--- a/rtgui/server/topwin.c
+++ b/rtgui/server/topwin.c
@@ -1042,28 +1042,3 @@ void rtgui_topwin_get_clipinfo(struct rtgui_rect* rect_list, rt_int32_t count)
 	rt_sem_release(&_rtgui_topwin_lock);
 }
 #endif
-
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-void rtgui_topwin_dump()
-{
-	struct rtgui_list_node* node;
-
-	rtgui_list_foreach(node, &_rtgui_topwin_show_list)
-	{
-		struct rtgui_topwin* wnd = rtgui_list_entry(node, struct rtgui_topwin, list);
-
-		rt_kprintf("wnd at (%d, %d) - (%d, %d)\n",
-			wnd->extent.x1, wnd->extent.y1, wnd->extent.x2, wnd->extent.y2);
-
-		if (wnd->title != RT_NULL)
-		{
-			rt_kprintf("title[%s] border (%d, %d) - (%d, %d)\n", wnd->title->title,
-				RTGUI_WIDGET(wnd->title)->extent.x1, RTGUI_WIDGET(wnd->title)->extent.y1,
-				RTGUI_WIDGET(wnd->title)->extent.x2, RTGUI_WIDGET(wnd->title)->extent.y2);
-		}
-	}
-}
-FINSH_FUNCTION_EXPORT(rtgui_topwin_dump, dump topwindow list);
-#endif
-