diff --git a/usb_int.c b/usb_int.c
deleted file mode 100644
--- a/usb_int.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/**
-  ******************************************************************************
-  * @file    usb_int.c
-  * @author  MCD Application Team
-  * @version V4.0.0
-  * @date    28-August-2012
-  * @brief   Endpoint CTR (Low and High) interrupt's service routines
-  ******************************************************************************
-  * @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 ---------------------------------------------------------*/
-__IO uint16_t SaveRState;
-__IO uint16_t SaveTState;
-
-/* Extern variables ----------------------------------------------------------*/
-extern void (*pEpInt_IN[7])(void);    /*  Handles IN  interrupts   */
-extern void (*pEpInt_OUT[7])(void);   /*  Handles OUT interrupts   */
-
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/*******************************************************************************
-* Function Name  : CTR_LP.
-* Description    : Low priority Endpoint Correct Transfer interrupt's service
-*                  routine.
-* Input          : None.
-* Output         : None.
-* Return         : None.
-*******************************************************************************/
-void CTR_LP(void)
-{
-  __IO uint16_t wEPVal = 0;
-  /* stay in loop while pending interrupts */
-  while (((wIstr = _GetISTR()) & ISTR_CTR) != 0)
-  {
-    /* extract highest priority endpoint number */
-    EPindex = (uint8_t)(wIstr & ISTR_EP_ID);
-    if (EPindex == 0)
-    {
-      /* Decode and service control endpoint interrupt */
-      /* calling related service routine */
-      /* (Setup0_Process, In0_Process, Out0_Process) */
-
-      /* save RX & TX status */
-      /* and set both to NAK */
-      
-	    SaveRState = _GetENDPOINT(ENDP0);
-	    SaveTState = SaveRState & EPTX_STAT;
-	    SaveRState &=  EPRX_STAT;	
-
-	    _SetEPRxTxStatus(ENDP0,EP_RX_NAK,EP_TX_NAK);
-
-      /* DIR bit = origin of the interrupt */
-
-      if ((wIstr & ISTR_DIR) == 0)
-      {
-        /* DIR = 0 */
-
-        /* DIR = 0      => IN  int */
-        /* DIR = 0 implies that (EP_CTR_TX = 1) always  */
-
-        _ClearEP_CTR_TX(ENDP0);
-        In0_Process();
-
-           /* before terminate set Tx & Rx status */
-
-            _SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
-		  return;
-      }
-      else
-      {
-        /* DIR = 1 */
-
-        /* DIR = 1 & CTR_RX       => SETUP or OUT int */
-        /* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */
-
-        wEPVal = _GetENDPOINT(ENDP0);
-        
-        if ((wEPVal &EP_SETUP) != 0)
-        {
-          _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */
-          Setup0_Process();
-          /* before terminate set Tx & Rx status */
-
-		      _SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
-          return;
-        }
-
-        else if ((wEPVal & EP_CTR_RX) != 0)
-        {
-          _ClearEP_CTR_RX(ENDP0);
-          Out0_Process();
-          /* before terminate set Tx & Rx status */
-     
-		     _SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
-          return;
-        }
-      }
-    }/* if(EPindex == 0) */
-    else
-    {
-      /* Decode and service non control endpoints interrupt  */
-
-      /* process related endpoint register */
-      wEPVal = _GetENDPOINT(EPindex);
-      if ((wEPVal & EP_CTR_RX) != 0)
-      {
-        /* clear int flag */
-        _ClearEP_CTR_RX(EPindex);
-
-        /* call OUT service function */
-        (*pEpInt_OUT[EPindex-1])();
-
-      } /* if((wEPVal & EP_CTR_RX) */
-
-      if ((wEPVal & EP_CTR_TX) != 0)
-      {
-        /* clear int flag */
-        _ClearEP_CTR_TX(EPindex);
-
-        /* call IN service function */
-        (*pEpInt_IN[EPindex-1])();
-      } /* if((wEPVal & EP_CTR_TX) != 0) */
-
-    }/* if(EPindex == 0) else */
-
-  }/* while(...) */
-}
-
-/*******************************************************************************
-* Function Name  : CTR_HP.
-* Description    : High Priority Endpoint Correct Transfer interrupt's service 
-*                  routine.
-* Input          : None.
-* Output         : None.
-* Return         : None.
-*******************************************************************************/
-void CTR_HP(void)
-{
-  uint32_t wEPVal = 0;
-
-  while (((wIstr = _GetISTR()) & ISTR_CTR) != 0)
-  {
-    _SetISTR((uint16_t)CLR_CTR); /* clear CTR flag */
-    /* extract highest priority endpoint number */
-    EPindex = (uint8_t)(wIstr & ISTR_EP_ID);
-    /* process related endpoint register */
-    wEPVal = _GetENDPOINT(EPindex);
-    if ((wEPVal & EP_CTR_RX) != 0)
-    {
-      /* clear int flag */
-      _ClearEP_CTR_RX(EPindex);
-
-      /* call OUT service function */
-      (*pEpInt_OUT[EPindex-1])();
-
-    } /* if((wEPVal & EP_CTR_RX) */
-    else if ((wEPVal & EP_CTR_TX) != 0)
-    {
-      /* clear int flag */
-      _ClearEP_CTR_TX(EPindex);
-
-      /* call IN service function */
-      (*pEpInt_IN[EPindex-1])();
-
-
-    } /* if((wEPVal & EP_CTR_TX) != 0) */
-
-  }/* while(...) */
-}
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/