diff --git a/examples/file/listdir.c b/examples/file/listdir.c
new file mode 100644
index 0000000000..86279163e5
--- /dev/null
+++ b/examples/file/listdir.c
@@ -0,0 +1,55 @@
+/*
+ * File      : listdir.c
+ * This file is part of RT-TestCase in RT-Thread RTOS
+ * COPYRIGHT (C) 2010, 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
+ * 2010-02-10     Bernard      first version
+ */
+#include <rtthread.h>
+#include <dfs_posix.h>
+
+void list_dir(const char* path)
+{
+	DIR *dir;
+
+	dir = opendir(path);
+	if (dir != RT_NULL)
+	{
+		struct dfs_dirent* dirent;
+		struct dfs_stat s;
+
+		do
+		{
+			dirent = readdir(dir);
+			if (dirent == RT_NULL) break;
+			rt_memset(&s, 0, sizeof(struct dfs_stat));
+
+			/* build full path for each file */
+			rt_sprintf(fullpath, "/%s", dirent->d_name);
+
+			stat(fullpath, &s);
+			if ( s.st_mode & DFS_S_IFDIR )
+			{
+				rt_kprintf("%s\t\t<DIR>\n", dirent->d_name);
+			}
+			else
+			{
+				rt_kprintf("%s\t\t%lu\n", dirent->d_name, s.st_size);
+			}
+		} while (dirent != RT_NULL);
+
+		closedir(dir);
+	}
+	else rt_kprintf("open %s directory failed\n", path);
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT(list_dir, list directory);
+#endif
diff --git a/examples/file/readspeed.c b/examples/file/readspeed.c
index e76471fb47..5d22756365 100644
--- a/examples/file/readspeed.c
+++ b/examples/file/readspeed.c
@@ -1,3 +1,17 @@
+/*
+ * File      : readspeed.c
+ * This file is part of RT-TestCase in RT-Thread RTOS
+ * COPYRIGHT (C) 2010, 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
+ * 2010-02-10     Bernard      first version
+ */
+
 #include <rtthread.h>
 #include <dfs_posix.h>
 
diff --git a/examples/file/readwrite.c b/examples/file/readwrite.c
new file mode 100644
index 0000000000..b4086cf056
--- /dev/null
+++ b/examples/file/readwrite.c
@@ -0,0 +1,34 @@
+/*
+ * File      : readwrite.c
+ * This file is part of RT-TestCase in RT-Thread RTOS
+ * COPYRIGHT (C) 2010, 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
+ * 2010-02-10     Bernard      first version
+ */
+#include <rtthread.h>
+#include <dfs_posix.h>
+
+/* 文件读写测试 */
+void readwrite(const char* filename)
+{
+	int fd;
+
+	/* 只写打开 */
+
+	/* 只写并在末尾添加打开 */
+
+	/* 只读打开进行数据校验 */
+
+	/* lseek测试，读出并校验数据 */
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT(readwrite, perform file read and write test);
+#endif
diff --git a/examples/file/writespeed.c b/examples/file/writespeed.c
new file mode 100644
index 0000000000..d829d9977b
--- /dev/null
+++ b/examples/file/writespeed.c
@@ -0,0 +1,56 @@
+/*
+ * File      : writespeed.c
+ * This file is part of RT-TestCase in RT-Thread RTOS
+ * COPYRIGHT (C) 2010, 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
+ * 2010-02-10     Bernard      first version
+ */
+#include <rtthread.h>
+#include <dfs_posix.h>
+
+void writespeed(const char* filename, int total_length, int block_size)
+{
+    int fd;
+    char *buff_ptr;
+    rt_tick_t tick;
+
+    fd = open(filename, 0, O_WRONLY);
+    if (fd < 0)
+    {
+        rt_kprintf("open file:%s failed\n", filename);
+        return;
+    }
+
+    buff_ptr = rt_malloc(block_size);
+    if (buff_ptr == RT_NULL)
+    {
+        rt_kprintf("no memory\n");
+        close(fd);
+
+        return;
+    }
+
+	/* prepare write data */
+
+    tick = rt_tick_get();
+
+    tick = rt_tick_get() - tick;
+
+	/* close file and release memory */
+    close(fd);
+	rt_free(buff_ptr);
+
+    /* calculate write speed */
+    rt_kprintf("File write speed: %d byte/s\n", total_length/ (tick/RT_TICK_PER_SECOND));
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT(writespeed, perform file write test);
+#endif