1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
3 /* serial port functions
5 * Author: Chris Toshok <toshok@ximian.com>
13 #include <sys/ioctl.h>
17 /* This is for FIONREAD on solaris */
19 #include <sys/filio.h>
22 /* This is a copy of System.IO.Ports.Handshake */
27 RequestToSendXOnXOff = 3
30 /* This is a copy of System.IO.Ports.Parity */
39 /* This is a copy of System.IO.Ports.StopBits */
47 /* This is a copy of System.IO.Ports.SerialSignal */
50 Cd = 1, /* Carrier detect */
51 Cts = 2, /* Clear to send */
52 Dsr = 4, /* Data set ready */
53 Dtr = 8, /* Data terminal ready */
54 Rts = 16 /* Request to send */
58 open_serial (char* devfile)
61 struct termios newtio;
63 fd = open (devfile, O_RDWR);
68 newtio.c_cflag = CLOCAL | CREAD;
73 tcflush(fd, TCIOFLUSH);
74 tcsetattr(fd,TCSANOW,&newtio);
80 close_serial (int unix_fd)
86 read_serial (int fd, guchar *buffer, int offset, int count)
90 n = read (fd, buffer + offset, count);
96 write_serial (int fd, guchar *buffer, int offset, int count, int timeout)
103 ufd.events = POLLHUP | POLLOUT | POLLERR;
105 poll (&ufd, 1, timeout);
107 if ((ufd.revents & POLLOUT) != POLLOUT) {
111 n = write (fd, buffer + offset, count);
115 discard_buffer (int fd, gboolean input)
117 tcflush(fd, input ? TCIFLUSH : TCOFLUSH);
121 get_bytes_in_buffer (int fd, gboolean input, gint32 *error)
126 if (ioctl (fd, input ? FIONREAD : TIOCOUTQ, &retval) == -1) {
135 set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStopBits stopBits, MonoHandshake handshake)
137 struct termios newtio;
139 tcgetattr (fd, &newtio);
142 case 230400: baud_rate = B230400; break;
143 case 115200: baud_rate = B115200; break;
144 case 57600: baud_rate = B57600; break;
145 case 38400: baud_rate = B38400; break;
146 case 19200: baud_rate = B19200; break;
147 case 9600: baud_rate = B9600; break;
148 case 4800: baud_rate = B4800; break;
149 case 2400: baud_rate = B2400; break;
150 case 1800: baud_rate = B1800; break;
151 case 1200: baud_rate = B1200; break;
152 case 600: baud_rate = B600; break;
153 case 300: baud_rate = B300; break;
154 case 200: baud_rate = B200; break;
155 case 150: baud_rate = B150; break;
156 case 134: baud_rate = B134; break;
157 case 110: baud_rate = B110; break;
158 case 75: baud_rate = B75; break;
167 case NoneParity: /* None */
168 newtio.c_iflag |= IGNPAR;
169 newtio.c_cflag &= ~(PARENB | PARODD);
172 newtio.c_iflag &= ~IGNPAR;
173 newtio.c_cflag |= PARENB | PARODD;
175 case Even: /* Even */
176 newtio.c_iflag &= ~(IGNPAR | PARODD);
177 newtio.c_cflag |= PARENB;
179 case Mark: /* Mark */
182 case Space: /* Space */
187 newtio.c_cflag &= ~CSIZE;
189 case 5: newtio.c_cflag |= CS5; break;
190 case 6: newtio.c_cflag |= CS6; break;
191 case 7: newtio.c_cflag |= CS7; break;
194 newtio.c_cflag |= CS8;
198 newtio.c_cflag &= ~CSTOPB;
204 /* do nothing, the default is one stop bit */
207 newtio.c_cflag |= CSTOPB;
209 case OnePointFive: /* OnePointFive */
214 newtio.c_iflag &= ~IXOFF;
215 newtio.c_oflag &= ~IXON;
217 newtio.c_cflag &= ~CRTSCTS;
218 #endif /* def CRTSCTS */
220 case NoneHandshake: /* None */
223 case RequestToSend: /* RequestToSend (RTS) */
225 newtio.c_cflag |= CRTSCTS;
226 #endif /* def CRTSCTS */
228 case RequestToSendXOnXOff: /* RequestToSendXOnXOff (RTS + XON/XOFF) */
230 newtio.c_cflag |= CRTSCTS;
231 #endif /* def CRTSCTS */
233 case XOnXOff: /* XOnXOff */
234 newtio.c_iflag |= IXOFF;
235 // newtio.c_oflag |= IXON;
239 if (cfsetospeed (&newtio, baud_rate) < 0 || cfsetispeed (&newtio, baud_rate) < 0 ||
240 tcsetattr (fd, TCSADRAIN, &newtio) < 0)
247 get_signal_code (MonoSerialSignal signal)
268 static MonoSerialSignal
269 get_mono_signal_codes (int signals)
271 MonoSerialSignal retval = NoneSignal;
273 if ((signals & TIOCM_CAR) != 0)
275 if ((signals & TIOCM_CTS) != 0)
277 if ((signals & TIOCM_DSR) != 0)
279 if ((signals & TIOCM_DTR) != 0)
281 if ((signals & TIOCM_RTS) != 0)
288 get_signals (int fd, gint32 *error)
294 if (ioctl (fd, TIOCMGET, &signals) == -1) {
299 return get_mono_signal_codes (signals);
303 set_signal (int fd, MonoSerialSignal signal, gboolean value)
305 int signals, expected, activated;
307 expected = get_signal_code (signal);
308 if (ioctl (fd, TIOCMGET, &signals) == -1)
311 activated = (signals & expected) != 0;
312 if (activated == value) /* Already set */
318 signals &= ~expected;
320 if (ioctl (fd, TIOCMSET, &signals) == -1)
327 poll_serial (int fd, gint32 *error)
334 pinfo.events = POLLIN;
337 if (poll (&pinfo, 1, 0) == -1) {
342 return (pinfo.revents & POLLIN) != 0 ? 1 : 0;
346 * mono internals should not be used here.
347 * this serial stuff needs to be implemented with icalls.
348 * make this at least compile until the code is moved elsewhere
349 * defined(linux) is wrong, too
352 list_serial_devices (void)
359 list_serial_devices (void)
363 /* Linux serial files are of the form ttyS[0-9]+ */
364 GSList *l, *list = NULL;
365 GDir* dir = g_dir_open ("/dev", 0, NULL);
366 const char *filename;
369 while ((filename = g_dir_read_name (dir))) {
371 if (!strncmp (filename, "ttyS", 4))
372 list = g_slist_append (list, g_strconcat ("/dev/", filename, NULL));
378 array = mono_array_new (mono_domain_get (), mono_get_string_class (), g_slist_length (list));
379 for (l = list; l; l = l->next) {
380 mono_array_set (array, gpointer, i++, mono_string_new (mono_domain_get (), (char*)l->data));
387 #warning "list_serial_devices isn't ported to this OS"