Initial commit of original code

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diff --git a/slip/slipdev.h b/slip/slipdev.h
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+/**
+ * \addtogroup slip
+ * @{
+ */
+
+/**
+ * \file
+ * SLIP header file.
+ * \author Adam Dunkels <adam@dunkels.com>
+ */
+
+/*
+ * Copyright (c) 2001, Adam Dunkels.
+ * All rights reserved. 
+ *
+ * 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. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.  
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.  
+ *
+ * This file is part of the uIP TCP/IP stack.
+ *
+ * $Id: slipdev.h,v 1.1 2006/06/17 22:41:18 adamdunkels Exp $
+ *
+ */
+
+#ifndef __SLIPDEV_H__
+#define __SLIPDEV_H__
+
+#include "uip.h"
+
+/**
+ * Put a character on the serial device.
+ *
+ * This function is used by the SLIP implementation to put a character
+ * on the serial device. It must be implemented specifically for the
+ * system on which the SLIP implementation is to be run.
+ *
+ * \param c The character to be put on the serial device.
+ */
+void slipdev_char_put(u8_t c);
+
+/**
+ * Poll the serial device for a character.
+ *
+ * This function is used by the SLIP implementation to poll the serial
+ * device for a character. It must be implemented specifically for the
+ * system on which the SLIP implementation is to be run.
+ *
+ * The function should return immediately regardless if a character is
+ * available or not. If a character is available it should be placed
+ * at the memory location pointed to by the pointer supplied by the
+ * arguement c.
+ *
+ * \param c A pointer to a byte that is filled in by the function with
+ * the received character, if available.
+ *
+ * \retval 0 If no character is available.
+ * \retval Non-zero If a character is available.
+ */
+u8_t slipdev_char_poll(u8_t *c);
+
+void slipdev_init(void);
+u8_t slipdev_send(void);
+u16_t slipdev_poll(void);
+
+#endif /* __SLIPDEV_H__ */
+
+/** @} */