diff --git a/libraries/USB/usb_sil.c b/libraries/USB/usb_sil.c
new file mode 100644
--- /dev/null
+++ b/libraries/USB/usb_sil.c
@@ -0,0 +1,103 @@
+/**
+  ******************************************************************************
+  * @file    usb_sil.c
+  * @author  MCD Application Team
+  * @version V4.0.0
+  * @date    28-August-2012
+  * @brief   Simplified Interface Layer for Global Initialization and Endpoint
+  *          Rea/Write operations.
+  ******************************************************************************
+  * @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.
+  *
+  ******************************************************************************
+  */
+
+
+/* Includes ------------------------------------------------------------------*/
+#include "usb_lib.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Extern variables ----------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name  : USB_SIL_Init
+* Description    : Initialize the USB Device IP and the Endpoint 0.
+* Input          : None.
+* Output         : None.
+* Return         : Status.
+*******************************************************************************/
+uint32_t USB_SIL_Init(void)
+{
+  /* USB interrupts initialization */
+  /* clear pending interrupts */
+  _SetISTR(0);
+  wInterrupt_Mask = IMR_MSK;
+  /* set interrupts mask */
+  _SetCNTR(wInterrupt_Mask);
+  return 0;
+}
+
+/*******************************************************************************
+* Function Name  : USB_SIL_Write
+* Description    : Write a buffer of data to a selected endpoint.
+* Input          : - bEpAddr: The address of the non control endpoint.
+*                  - pBufferPointer: The pointer to the buffer of data to be written
+*                    to the endpoint.
+*                  - wBufferSize: Number of data to be written (in bytes).
+* Output         : None.
+* Return         : Status.
+*******************************************************************************/
+uint32_t USB_SIL_Write(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize)
+{
+  /* Use the memory interface function to write to the selected endpoint */
+  UserToPMABufferCopy(pBufferPointer, GetEPTxAddr(bEpAddr & 0x7F), wBufferSize);
+
+  /* Update the data length in the control register */
+  SetEPTxCount((bEpAddr & 0x7F), wBufferSize);
+  
+  return 0;
+}
+
+/*******************************************************************************
+* Function Name  : USB_SIL_Read
+* Description    : Write a buffer of data to a selected endpoint.
+* Input          : - bEpAddr: The address of the non control endpoint.
+*                  - pBufferPointer: The pointer to which will be saved the 
+*                     received data buffer.
+* Output         : None.
+* Return         : Number of received data (in Bytes).
+*******************************************************************************/
+uint32_t USB_SIL_Read(uint8_t bEpAddr, uint8_t* pBufferPointer)
+{
+  uint32_t DataLength = 0;
+
+  /* Get the number of received data on the selected Endpoint */
+  DataLength = GetEPRxCount(bEpAddr & 0x7F);
+  
+  /* Use the memory interface function to write to the selected endpoint */
+  PMAToUserBufferCopy(pBufferPointer, GetEPRxAddr(bEpAddr & 0x7F), DataLength);
+
+  /* Return the number of received data */
+  return DataLength;
+}
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/