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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* serial port functions
*
* Author: Chris Toshok <toshok@ximian.com>
*/
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/poll.h>
#include <glib.h>
int
open_serial (char* devfile)
{
int fd;
struct termios newtio;
fd = open (devfile, O_RDWR);
if (fd == -1)
return -1;
newtio.c_cflag = CLOCAL | CREAD;
newtio.c_iflag = 0;
newtio.c_oflag = 0;
newtio.c_lflag = 0;
tcflush(fd, TCIOFLUSH);
tcsetattr(fd,TCSANOW,&newtio);
fcntl (fd, F_SETFL, O_NONBLOCK);
return fd;
}
void
close_serial (int unix_fd)
{
close (unix_fd);
}
guint32
read_serial (int fd, guchar *buffer, int offset, int count, int timeout)
{
guint32 n;
struct pollfd ufd;
ufd.fd = fd;
ufd.events = POLLHUP | POLLIN | POLLERR;
poll (&ufd, 1, timeout);
if ((ufd.revents & POLLIN) != POLLIN) {
return -1;
}
n = read (fd, buffer + offset, count);
return (guint32) n;
}
void
write_serial (int fd, guchar *buffer, int offset, int count, int timeout)
{
guint32 n;
struct pollfd ufd;
ufd.fd = fd;
ufd.events = POLLHUP | POLLOUT | POLLERR;
poll (&ufd, 1, timeout);
if ((ufd.revents & POLLOUT) != POLLOUT) {
return;
}
n = write (fd, buffer + offset, count);
}
void
discard_buffer (int fd, gboolean input)
{
tcflush(fd, input ? TCIFLUSH : TCOFLUSH);
}
gboolean
set_attributes (int fd, int baud_rate, int parity, int dataBits, int stopBits, int handshake)
{
struct termios newtio;
tcgetattr (fd, &newtio);
switch (baud_rate) {
case 230400: baud_rate = B230400; break;
case 115200: baud_rate = B115200; break;
case 57600: baud_rate = B57600; break;
case 38400: baud_rate = B38400; break;
case 19200: baud_rate = B19200; break;
case 9600: baud_rate = B9600; break;
case 4800: baud_rate = B4800; break;
case 2400: baud_rate = B2400; break;
case 1800: baud_rate = B1800; break;
case 1200: baud_rate = B1200; break;
case 600: baud_rate = B600; break;
case 300: baud_rate = B300; break;
case 200: baud_rate = B200; break;
case 150: baud_rate = B150; break;
case 134: baud_rate = B134; break;
case 110: baud_rate = B110; break;
case 75: baud_rate = B75; break;
case 50:
case 0:
default:
baud_rate = B9600;
break;
}
switch (parity) {
case 0: /* Even */
newtio.c_iflag &= ~IGNPAR;
newtio.c_cflag |= PARENB;
break;
case 1: /* Mark */
/* XXX unhandled */
break;
case 2: /* None */
newtio.c_iflag |= IGNPAR;
newtio.c_cflag &= ~(PARENB | PARODD);
break;
case 3: /* Odd */
newtio.c_iflag &= ~IGNPAR;
newtio.c_cflag |= PARENB | PARODD;
break;
case 4: /* Space */
/* XXX unhandled */
break;
}
newtio.c_cflag &= ~CSIZE;
switch (dataBits) {
case 5: newtio.c_cflag |= CS5; break;
case 6: newtio.c_cflag |= CS6; break;
case 7: newtio.c_cflag |= CS7; break;
case 8:
default:
newtio.c_cflag |= CS8;
break;
}
newtio.c_cflag &= ~CSTOPB;
switch (stopBits) {
case 0: /* One */
/* do nothing, the default is one stop bit */
break;
case 1: /* OnePointFive */
/* XXX unhandled */
break;
case 2: /* Two */
newtio.c_cflag |= CSTOPB;
break;
}
newtio.c_iflag &= ~IXOFF;
newtio.c_oflag &= ~IXON;
#ifdef CRTSCTS
newtio.c_cflag &= ~CRTSCTS;
#endif /* def CRTSCTS */
switch (handshake) {
case 0: /* None */
/* do nothing */
break;
case 1: /* RequestToSend (RTS) */
#ifdef CRTSCTS
newtio.c_cflag |= CRTSCTS;
#endif /* def CRTSCTS */
break;
case 2: /* RequestToSendXOnXOff (RTS + XON/XOFF) */
#ifdef CRTSCTS
newtio.c_cflag |= CRTSCTS;
#endif /* def CRTSCTS */
/* fall through */
case 3: /* XOnXOff */
newtio.c_iflag |= IXOFF;
// newtio.c_oflag |= IXON;
break;
}
cfsetospeed (&newtio, baud_rate);
cfsetispeed (&newtio, baud_rate);
tcsetattr(fd,TCSADRAIN,&newtio);
return TRUE;
}
/*
* mono internals should not be used here.
* this serial stuff needs to be implemented with icalls.
* make this at least compile until the code is moved elsewhere
* defined(linux) is wrong, too
*/
void*
list_serial_devices (void)
{
return NULL;
}
#if 0
MonoArray *
list_serial_devices (void)
{
MonoArray *array;
#if defined(linux)
/* Linux serial files are of the form ttyS[0-9]+ */
GSList *l, *list = NULL;
GDir* dir = g_dir_open ("/dev", 0, NULL);
const char *filename;
int i = 0;
while ((filename = g_dir_read_name (dir))) {
if (filename) {
if (!strncmp (filename, "ttyS", 4))
list = g_slist_append (list, g_strconcat ("/dev/", filename, NULL));
}
}
g_dir_close (dir);
array = mono_array_new (mono_domain_get (), mono_get_string_class (), g_slist_length (list));
for (l = list; l; l = l->next) {
mono_array_set (array, gpointer, i++, mono_string_new (mono_domain_get (), (char*)l->data));
g_free (l->data);
}
g_slist_free (list);
#else
#warning "list_serial_devices isn't ported to this OS"
#endif
return array;
}
#endif
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