Contiki-Inga 3.x
slip_uart0.c
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1 /*
2  * Copyright (c) 2010, University of Colombo School of Computing
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  * @(#)$$
32  */
33 
34 /**
35  * \file
36  * Machine dependent AVR SLIP routines for UART0.
37  * \author
38  * Kasun Hewage <kasun.ch@gmail.com>
39  */
40 
41 #include <stdio.h>
42 #include "contiki.h"
43 #include "dev/rs232.h"
44 #include "slip.h"
45 
46 /*---------------------------------------------------------------------------*/
47 static int
48 slip_putchar(char c, FILE *stream)
49 {
50 #define SLIP_END 0300
51  static char debug_frame = 0;
52 
53  if (!debug_frame) { /* Start of debug output */
54  slip_arch_writeb(SLIP_END);
55  slip_arch_writeb('\r'); /* Type debug line == '\r' */
56  debug_frame = 1;
57  }
58 
59  slip_arch_writeb((unsigned char)c);
60 
61  /*
62  * Line buffered output, a newline marks the end of debug output and
63  * implicitly flushes debug output.
64  */
65  if (c == '\n') {
66  slip_arch_writeb(SLIP_END);
67  debug_frame = 0;
68  }
69 
70  return c;
71 }
72 /*---------------------------------------------------------------------------*/
73 static FILE slip_stdout = FDEV_SETUP_STREAM(slip_putchar, NULL,
74  _FDEV_SETUP_WRITE);
75 /*---------------------------------------------------------------------------*/
76 void
77 slip_arch_init(unsigned long ubr)
78 {
79  rs232_set_input(SLIP_PORT, slip_input_byte);
80  stdout = &slip_stdout;
81 }
82 /*---------------------------------------------------------------------------*/
83 /*
84  XXX:
85  Currently, the following function is in cpu/avr/dev/rs232.c file. this
86  should be moved to here from there hence this is a platform specific slip
87  related function.
88 void
89 slip_arch_writeb(unsigned char c)
90 {
91  rs232_send(RS232_PORT_0, c);
92 }
93 */
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