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 #if defined(__APPLE__)
18 #include <sys/ioctl.h>
22 /* This is for FIONREAD on solaris */
24 #include <sys/filio.h>
27 /* sys/time.h (for timeval) is required when using osx 10.3 (but not 10.4) */
32 /* This is a copy of System.IO.Ports.Handshake */
37 RequestToSendXOnXOff = 3
40 /* This is a copy of System.IO.Ports.Parity */
49 /* This is a copy of System.IO.Ports.StopBits */
57 /* This is a copy of System.IO.Ports.SerialSignal */
60 Cd = 1, /* Carrier detect */
61 Cts = 2, /* Clear to send */
62 Dsr = 4, /* Data set ready */
63 Dtr = 8, /* Data terminal ready */
64 Rts = 16 /* Request to send */
68 open_serial (char* devfile)
71 fd = open (devfile, O_RDWR | O_NOCTTY | O_NONBLOCK);
77 close_serial (int unix_fd)
79 // Linus writes: do not retry close after EINTR
80 return close (unix_fd);
84 read_serial (int fd, guchar *buffer, int offset, int count)
88 n = read (fd, buffer + offset, count);
94 write_serial (int fd, guchar *buffer, int offset, int count, int timeout)
100 pinfo.events = POLLOUT;
101 pinfo.revents = POLLOUT;
112 while ((c = poll (&pinfo, 1, timeout)) == -1 && errno == EINTR)
119 t = write (fd, buffer + offset, n);
120 } while (t == -1 && errno == EINTR);
133 discard_buffer (int fd, gboolean input)
135 return tcflush(fd, input ? TCIFLUSH : TCOFLUSH);
139 get_bytes_in_buffer (int fd, gboolean input)
143 if (ioctl (fd, input ? FIONREAD : TIOCOUTQ, &retval) == -1) {
151 is_baud_rate_legal (int baud_rate)
153 return setup_baud_rate (baud_rate) != -1;
157 setup_baud_rate (int baud_rate)
161 /*Some values are not defined on OSX and *BSD */
233 set_attributes (int fd, int baud_rate, MonoParity parity, int dataBits, MonoStopBits stopBits, MonoHandshake handshake)
235 struct termios newtio;
237 if (tcgetattr (fd, &newtio) == -1)
240 newtio.c_cflag |= (CLOCAL | CREAD);
241 newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ISIG | IEXTEN );
242 newtio.c_oflag &= ~(OPOST);
243 newtio.c_iflag = IGNBRK;
246 baud_rate = setup_baud_rate (baud_rate);
249 newtio.c_cflag &= ~CSIZE;
253 newtio.c_cflag |= CS5;
256 newtio.c_cflag |= CS6;
259 newtio.c_cflag |= CS7;
263 newtio.c_cflag |= CS8;
274 /* do nothing, the default is one stop bit */
275 newtio.c_cflag &= ~CSTOPB;
278 newtio.c_cflag |= CSTOPB;
280 case OnePointFive: /* OnePointFive */
286 newtio.c_iflag &= ~(INPCK | ISTRIP );
290 case NoneParity: /* None */
291 newtio.c_cflag &= ~(PARENB | PARODD);
295 newtio.c_cflag |= PARENB | PARODD;
298 case Even: /* Even */
299 newtio.c_cflag &= ~(PARODD);
300 newtio.c_cflag |= (PARENB);
303 case Mark: /* Mark */
306 case Space: /* Space */
311 newtio.c_iflag &= ~(IXOFF | IXON);
313 newtio.c_cflag &= ~CRTSCTS;
314 #endif /* def CRTSCTS */
318 case NoneHandshake: /* None */
321 case RequestToSend: /* RequestToSend (RTS) */
323 newtio.c_cflag |= CRTSCTS;
324 #endif /* def CRTSCTS */
326 case RequestToSendXOnXOff: /* RequestToSendXOnXOff (RTS + XON/XOFF) */
328 newtio.c_cflag |= CRTSCTS;
329 #endif /* def CRTSCTS */
331 case XOnXOff: /* XOnXOff */
332 newtio.c_iflag |= IXOFF | IXON;
336 if (cfsetospeed (&newtio, baud_rate) < 0 || cfsetispeed (&newtio, baud_rate) < 0 ||
337 tcsetattr (fd, TCSANOW, &newtio) < 0)
349 get_signal_code (MonoSerialSignal signal)
370 static MonoSerialSignal
371 get_mono_signal_codes (int signals)
373 MonoSerialSignal retval = NoneSignal;
375 if ((signals & TIOCM_CAR) != 0)
377 if ((signals & TIOCM_CTS) != 0)
379 if ((signals & TIOCM_DSR) != 0)
381 if ((signals & TIOCM_DTR) != 0)
383 if ((signals & TIOCM_RTS) != 0)
390 get_signals (int fd, gint32 *error)
396 if (ioctl (fd, TIOCMGET, &signals) == -1) {
401 return get_mono_signal_codes (signals);
405 set_signal (int fd, MonoSerialSignal signal, gboolean value)
407 int signals, expected, activated;
409 expected = get_signal_code (signal);
410 if (ioctl (fd, TIOCMGET, &signals) == -1)
413 activated = (signals & expected) != 0;
414 if (activated == value) /* Already set */
420 signals &= ~expected;
422 if (ioctl (fd, TIOCMSET, &signals) == -1)
431 return tcsendbreak (fd, 0);
435 poll_serial (int fd, gint32 *error, int timeout)
442 pinfo.events = POLLIN;
445 while (poll (&pinfo, 1, timeout) == -1 && errno == EINTR) {
446 /* EINTR is an OK condition, we should not throw in the upper layer an IOException */
453 return (pinfo.revents & POLLIN) != 0 ? 1 : 0;
457 * mono internals should not be used here.
458 * this serial stuff needs to be implemented with icalls.
459 * make this at least compile until the code is moved elsewhere
460 * defined(linux) is wrong, too
463 list_serial_devices (void)
470 list_serial_devices (void)
474 /* Linux serial files are of the form ttyS[0-9]+ */
475 GSList *l, *list = NULL;
476 GDir* dir = g_dir_open ("/dev", 0, NULL);
477 const char *filename;
480 while ((filename = g_dir_read_name (dir))) {
482 if (!strncmp (filename, "ttyS", 4))
483 list = g_slist_append (list, g_strconcat ("/dev/", filename, NULL));
489 array = mono_array_new (mono_domain_get (), mono_get_string_class (), g_slist_length (list));
490 for (l = list; l; l = l->next) {
491 mono_array_set (array, gpointer, i++, mono_string_new (mono_domain_get (), (char*)l->data));
498 #warning "list_serial_devices isn't ported to this OS"