Contiki 2.6

slip_uart0.c

Go to the documentation of this file.
00001 /*
00002  * Copyright (c) 2010, University of Colombo School of Computing
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Contiki operating system.
00030  *
00031  * @(#)$$
00032  */
00033 
00034 /**
00035  * \file
00036  *         Machine dependent AVR SLIP routines for UART0.
00037  * \author
00038  *         Kasun Hewage <kasun.ch@gmail.com>
00039  */
00040 
00041 #include <stdio.h>
00042 #include "contiki.h"
00043 #include "dev/rs232.h"
00044 #include "slip.h"
00045 
00046 /*---------------------------------------------------------------------------*/
00047 static int
00048 slip_putchar(char c, FILE *stream)
00049 {
00050 #define SLIP_END 0300
00051   static char debug_frame = 0;
00052 
00053   if (!debug_frame) {        /* Start of debug output */
00054     slip_arch_writeb(SLIP_END);
00055     slip_arch_writeb('\r'); /* Type debug line == '\r' */
00056     debug_frame = 1;
00057   }
00058 
00059   slip_arch_writeb((unsigned char)c);
00060           
00061   /*
00062    * Line buffered output, a newline marks the end of debug output and
00063    * implicitly flushes debug output.         
00064    */
00065   if (c == '\n') {
00066     slip_arch_writeb(SLIP_END);
00067     debug_frame = 0;
00068   }
00069 
00070   return c;
00071 }
00072 /*---------------------------------------------------------------------------*/
00073 static FILE slip_stdout = FDEV_SETUP_STREAM(slip_putchar, NULL,
00074                                             _FDEV_SETUP_WRITE);
00075 /*---------------------------------------------------------------------------*/
00076 void
00077 slip_arch_init(unsigned long ubr)
00078 {
00079   rs232_set_input(RS232_PORT_0, slip_input_byte);
00080   stdout = &slip_stdout;
00081 }
00082 /*---------------------------------------------------------------------------*/
00083 /*
00084  XXX:
00085       Currently, the following function is in cpu/avr/dev/rs232.c file. this
00086       should be moved to here from there hence this is a platform specific slip 
00087       related function. 
00088 void
00089 slip_arch_writeb(unsigned char c)
00090 {
00091   rs232_send(RS232_PORT_0, c);
00092 }
00093 */