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diff --git a/apps/examples/can/can.h b/apps/examples/can/can.h
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+/****************************************************************************
+ * examples/examples/can/can.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 NuttX 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 OWNER 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.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_EXAMPLES_CAN_CAN_H
+#define __APPS_EXAMPLES_CAN_CAN_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+/* This test depends on these specific CAN configurations settings (your
+ * specific CAN settings might require additional settings).
+ *
+ * CONFIG_CAN - Enables CAN support.
+ * CONFIG_CAN_LOOPBACK - A CAN driver may or may not support a loopback
+ *   mode for testing. The STM32 CAN driver does support loopback mode.
+ *
+ * Specific configuration options for this example include:
+ *
+ * CONFIG_NSH_BUILTIN_APPS - Build the CAN test as an NSH built-in function.
+ *   Default: Built as a standalone problem
+ * CONFIG_CAN_LOOPBACK
+ * CONFIG_EXAMPLES_CAN_DEVPATH - The path to the CAN device. Default: /dev/can0
+ * CONFIG_EXAMPLES_CAN_NMSGS - If CONFIG_NSH_BUILTIN_APPS
+ *   is defined, then the number of loops is provided on the command line
+ *   and this value is ignored.  Otherwise, this number of CAN message is
+ *   collected and the program terminates.  Default:  If built as an NSH
+ *   built-in, the default is 32.  Otherwise messages are sent and received
+ *   indefinitely.
+ * CONFIG_EXAMPLES_CAN_READONLY - Only receive messages
+ * CONFIG_EXAMPLES_CAN_WRITEONLY - Only send messages
+ */
+
+#ifndef CONFIG_CAN
+#  error "CAN device support is not enabled (CONFIG_CAN)"
+#endif
+
+#ifndef CONFIG_CAN_LOOPBACK
+#  warning "CAN loopback is not enabled (CONFIG_CAN_LOOPBACK)"
+#endif
+
+#ifndef CONFIG_EXAMPLES_CAN_DEVPATH
+#  define CONFIG_EXAMPLES_CAN_DEVPATH "/dev/can0"
+#endif
+
+#if defined(CONFIG_NSH_BUILTIN_APPS) && !defined(CONFIG_EXAMPLES_CAN_NMSGS)
+#  define CONFIG_EXAMPLES_CAN_NMSGS 32
+#endif
+
+/* Debug ********************************************************************/
+
+#ifdef CONFIG_CPP_HAVE_VARARGS
+#  ifdef CONFIG_DEBUG
+#    define message(...) lib_rawprintf(__VA_ARGS__)
+#    define msgflush()
+#  else
+#    define message(...) printf(__VA_ARGS__)
+#    define msgflush() fflush(stdout)
+#  endif
+#else
+#  ifdef CONFIG_DEBUG
+#    define message lib_rawprintf
+#    define msgflush()
+#  else
+#    define message printf
+#    define msgflush() fflush(stdout)
+#  endif
+#endif
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: can_devinit()
+ *
+ * Description:
+ *   Perform architecuture-specific initialization of the CAN hardware.  This
+ *   interface must be provided by all configurations using apps/examples/can
+ *
+ ****************************************************************************/
+
+int can_devinit(void);
+
+#endif /* __APPS_EXAMPLES_CAN_CAN_H */