diff --git a/usb_sil.h b/usb_sil.h
new file mode 100644
--- /dev/null
+++ b/usb_sil.h
@@ -0,0 +1,47 @@
+/**
+  ******************************************************************************
+  * @file    usb_sil.h
+  * @author  MCD Application Team
+  * @version V4.0.0
+  * @date    28-August-2012
+  * @brief   Simplified Interface Layer function prototypes.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USB_SIL_H
+#define __USB_SIL_H
+
+/* Includes ------------------------------------------------------------------*/
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+
+uint32_t USB_SIL_Init(void);
+uint32_t USB_SIL_Write(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize);
+uint32_t USB_SIL_Read(uint8_t bEpAddr, uint8_t* pBufferPointer);
+
+/* External variables --------------------------------------------------------*/
+
+#endif /* __USB_SIL_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/