diff --git a/usb_device.c b/usb_device.c
new file mode 100644
--- /dev/null
+++ b/usb_device.c
@@ -0,0 +1,68 @@
+/**
+  ******************************************************************************
+  * @file           : USB_DEVICE
+  * @date           : 03/01/2015 14:04:02  
+  * @version        : v1.0_Cube
+  * @brief          : This file implements the USB Device 
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2015 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  * 1. Redistributions of source code must retain the above copyright notice,
+  * this list of conditions and the following disclaimer.
+  * 2. Redistributions in binary form must reproduce the above copyright notice,
+  * this list of conditions and the following disclaimer in the documentation
+  * and/or other materials provided with the distribution.
+  * 3. Neither the name of STMicroelectronics nor the names of its contributors
+  * may be used to endorse or promote products derived from this software
+  * without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+*/
+
+/* Includes ------------------------------------------------------------------*/
+
+#include "usb_device.h"
+#include "usbd_core.h"
+#include "usbd_desc.h"
+#include "usbd_cdc.h"
+#include "usbd_cdc_if.h"
+
+/* USB Device Core handle declaration */
+USBD_HandleTypeDef hUsbDeviceFS;
+
+/* init function */				        
+void MX_USB_DEVICE_Init(void)
+{
+  /* Init Device Library,Add Supported Class and Start the library*/
+  USBD_Init(&hUsbDeviceFS, &FS_Desc, DEVICE_FS);
+
+  USBD_RegisterClass(&hUsbDeviceFS, &USBD_CDC);
+
+  USBD_CDC_RegisterInterface(&hUsbDeviceFS, &USBD_Interface_fops_FS);
+
+  USBD_Start(&hUsbDeviceFS);
+
+}
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/