diff --git a/sw/airborne/arch/stm32/can_hw.c.bak b/sw/airborne/arch/stm32/can_hw.c.bak
deleted file mode 100644
index 0af27f4d48..0000000000
--- a/sw/airborne/arch/stm32/can_hw.c.bak
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * $Id:$
- *
- * Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
- *
- * This file is part of paparazzi.
- *
- * paparazzi is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * paparazzi is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with paparazzi; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- *
- */
-
-#include <stdint.h>
-#include <string.h>
-
-#include "can_hw.h"
-
-#include <stm32/rcc.h>
-#include <stm32/gpio.h>
-#include <stm32/flash.h>
-#include <stm32/misc.h>
-#include <stm32/can.h>
-
-#include "led.h"
-
-#define RCC_APB2Periph_GPIO_CAN RCC_APB2Periph_GPIOA
-#define GPIO_CAN GPIOA
-#define GPIO_Pin_CAN_RX GPIO_Pin_11
-#define GPIO_Pin_CAN_TX GPIO_Pin_12
-
-CanTxMsg can_tx_msg;
-
-void can_hw_init(void)
-{
-	GPIO_InitTypeDef gpio;
-	NVIC_InitTypeDef nvic;
-	CAN_InitTypeDef can;
-	CAN_FilterInitTypeDef can_filter;
-
-	/* Enable peripheral clocks */
-	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO |
-			       RCC_APB2Periph_GPIO_CAN, ENABLE);
-	RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
-
-	/* Configure CAN pin: RX */
-	gpio.GPIO_Pin = GPIO_Pin_CAN_RX;
-	gpio.GPIO_Mode = GPIO_Mode_IPU;
-	gpio.GPIO_Speed = GPIO_Speed_50MHz;
-	GPIO_Init(GPIO_CAN, &gpio);
-
-	/* Configure CAN pin: TX */
-	gpio.GPIO_Pin = GPIO_Pin_CAN_TX;
-	gpio.GPIO_Mode = GPIO_Mode_AF_PP;
-	gpio.GPIO_Speed = GPIO_Speed_50MHz;
-	GPIO_Init(GPIO_CAN, &gpio);
-
-	/* NVIC configuration */
-	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
-
-	nvic.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
-	nvic.NVIC_IRQChannelPreemptionPriority = 0x00;
-	nvic.NVIC_IRQChannelSubPriority = 0x00;
-	nvic.NVIC_IRQChannelCmd = ENABLE;
-	NVIC_Init(&nvic);
-
-	/* CAN register init */
-	CAN_DeInit(CAN1);
-	CAN_StructInit(&can);
-
-	/* CAN cell init */
-	can.CAN_TTCM = DISABLE;
-	can.CAN_ABOM = DISABLE;
-	can.CAN_AWUM = DISABLE;
-	can.CAN_NART = DISABLE;
-	can.CAN_RFLM = DISABLE;
-	can.CAN_TXFP = DISABLE;
-	can.CAN_Mode = CAN_Mode_Normal;
-	can.CAN_SJW = CAN_SJW_1tq;
-	can.CAN_BS1 = CAN_BS1_3tq;
-	can.CAN_BS2 = CAN_BS2_5tq;
-	can.CAN_Prescaler = 4;
-	CAN_Init(CAN1, &can);
-
-	/* CAN filter init */
-	can_filter.CAN_FilterNumber = 0;
-	can_filter.CAN_FilterMode = CAN_FilterMode_IdMask;
-	can_filter.CAN_FilterScale = CAN_FilterScale_32bit;
-	can_filter.CAN_FilterIdHigh = 0x0000;
-	can_filter.CAN_FilterIdLow = 0x0000;
-	can_filter.CAN_FilterMaskIdHigh = 0x0000;
-	can_filter.CAN_FilterMaskIdLow = 0x0000;
-	can_filter.CAN_FilterFIFOAssignment = 0;
-	can_filter.CAN_FilterActivation = ENABLE;
-	CAN_FilterInit(&can_filter);
-
-	/* transmit struct init */
-	can_tx_msg.StdId = 0x321;
-	can_tx_msg.ExtId = 0x00;
-	can_tx_msg.RTR = CAN_RTR_DATA;
-	can_tx_msg.IDE = CAN_ID_STD;
-	can_tx_msg.DLC = 1;
-
-	CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
-
-	can_tx_msg.Data[0] = 0x55;
-
-	CAN_Transmit(CAN1, &can_tx_msg);
-}
-
-int can_hw_transmit(uint16_t id, const uint8_t *buf, uint8_t len)
-{
-	if(len > 8){
-		return -1;
-	}
-
-//	can_tx_msg.StdId = id >> 8;
-//	can_tx_msg.ExtId = id & 0xFF;
-//	can_tx_msg.DLC = len;
-//	memcpy(&can_tx_msg.Data, buf, len);
-//
-//	CAN_Transmit(CAN1, &can_tx_msg);
-
-	//can_tx_msg.StdId = 0;
-	//can_tx_msg.ExtId = 0x1234;
-	//can_tx_msg.DLC = 1;
-	//can_tx_msg.Data[0] = 0x55;
-
-	//CAN_Transmit(CAN1, &can_tx_msg);
-
-	return 0;
-}