commit initial release

git-svn-id: file:///home/lennart/svn/public/pgets/trunk@3 768266df-afd4-0310-94a7-d396c829e022

1 files changed, 76 insertions, 0 deletions

diff --git a/src/modem.c b/src/modem.c
new file mode 100644
index 0000000..677d4cf
--- /dev/null
+++ b/src/modem.c
@@ -0,0 +1,76 @@
+/* $Id$
+ *
+ * This file is part of pgets. 
+ *
+ * pgets is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * pgets is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with pgets; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <termios.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h> 
+
+#include "modem.h"
+
+static struct termios _saved_termios;
+
+/* Opens the modem and sets the baud rate */
+int modem_open(const char *dev) {
+    struct termios pts; 
+    int fd, n;
+
+    if ((fd = open(dev, O_RDWR|O_NDELAY)) < 0) {
+        perror("Serial port open failure");
+        return -1;
+    }
+
+    n = fcntl(fd, F_GETFL, 0);
+    fcntl(fd, F_SETFL, n & ~O_NDELAY);
+
+    if (tcgetattr(fd, &_saved_termios) != 0) {
+        perror("Serial port TERMIOS get failure");
+        close(fd);
+        return -1;
+    }
+   
+    memset(&pts, 0, sizeof pts);
+    pts.c_cflag = CS8 | CLOCAL | CREAD;
+    pts.c_iflag = IGNPAR | IGNBRK | IGNCR | IXON | IXOFF;
+    pts.c_oflag = 0;
+    pts.c_lflag = 0;
+
+    pts.c_cc[VMIN] = 1;
+    pts.c_cc[VTIME] = 0;
+
+    cfsetospeed(&pts, B9600);
+    cfsetispeed(&pts, B9600);
+
+    tcflush(fd, TCIFLUSH);
+    if (tcsetattr(fd, TCSANOW, &pts) != 0) {
+        perror("Serial port TERMIOS set failure");
+        close(fd);
+        return -1;
+    }
+
+    return fd;
+}
+
+/* Closes the modem device and resets the baudrate */
+void modem_close(int fd) {
+    tcflush(fd, TCIFLUSH);
+    tcsetattr(fd, TCSANOW, &_saved_termios);
+    close(fd);
+}