blob: 2f2e5291d986cf3dfbb02df8490819015b9dd3cb [file] [log] [blame]
wdenk6dd652f2003-06-19 23:40:20 +00001/*
2 * (C) Copyright 2000
3 * Murray Jensen <Murray.Jensen@csiro.au>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
wdenkbca52d62001-10-15 12:12:42 +000024#include <unistd.h>
25#include <string.h>
26#include <fcntl.h>
27#include <sys/time.h>
28#include "serial.h"
29
30#if defined(__sun__) || \
31 defined(__OpenBSD__) || \
32 defined(__FreeBSD__) || \
33 defined(__NetBSD__) || \
34 defined(__APPLE__)
35static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, { 0 } };
36#else
37static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, 0 };
38#endif
39
40static struct speedmap {
41 char *str;
42 speed_t val;
43} speedmap[] = {
44 { "50", B50 }, { "75", B75 }, { "110", B110 },
45 { "134", B134 }, { "150", B150 }, { "200", B200 },
46 { "300", B300 }, { "600", B600 }, { "1200", B1200 },
47 { "1800", B1800 }, { "2400", B2400 }, { "4800", B4800 },
48 { "9600", B9600 }, { "19200", B19200 }, { "38400", B38400 },
49 { "57600", B57600 },
50#ifdef B76800
51 { "76800", B76800 },
52#endif
53 { "115200", B115200 },
54#ifdef B153600
55 { "153600", B153600 },
56#endif
57 { "230400", B230400 },
58#ifdef B307200
59 { "307200", B307200 },
60#endif
61#ifdef B460800
62 { "460800", B460800 }
63#endif
64};
65static int nspeeds = sizeof speedmap / sizeof speedmap[0];
66
67speed_t
68cvtspeed(char *str)
69{
70 struct speedmap *smp = speedmap, *esmp = &speedmap[nspeeds];
71
72 while (smp < esmp) {
73 if (strcmp(str, smp->str) == 0)
74 return (smp->val);
75 smp++;
76 }
77 return B0;
78}
79
80int
81serialopen(char *device, speed_t speed)
82{
83 int fd;
84
85 if (cfsetospeed(&tios, speed) < 0)
86 return -1;
87
88 if ((fd = open(device, O_RDWR)) < 0)
89 return -1;
90
91 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
92 (void)close(fd);
93 return -1;
94 }
95
96 return fd;
97}
98
99int
100serialreadchar(int fd, int timeout)
101{
102 fd_set fds;
103 struct timeval tv;
104 int n;
105 char ch;
106
107 tv.tv_sec = timeout;
108 tv.tv_usec = 0;
109
110 FD_ZERO(&fds);
111 FD_SET(fd, &fds);
112
113 /* this is a fucking horrible quick hack - fix this */
114
115 if ((n = select(fd + 1, &fds, 0, 0, &tv)) < 0)
116 return SERIAL_ERROR;
117
118 if (n == 0)
119 return SERIAL_TIMEOUT;
120
121 if ((n = read(fd, &ch, 1)) < 0)
122 return SERIAL_ERROR;
123
124 if (n == 0)
125 return SERIAL_EOF;
126
127 return ch;
128}
129
130int
131serialwrite(int fd, char *buf, int len)
132{
133 int n;
134
135 do {
136 n = write(fd, buf, len);
137 if (n < 0)
138 return 1;
139 len -= n;
140 buf += n;
141 } while (len > 0);
142 return 0;
143}
144
145int
146serialclose(int fd)
147{
148 return close(fd);
149}