adding basic tty support

posctl.cc

@@ -382,6 +382,7 @@ void posctl_gui_update() {
 	strfromd (txt, sizeof(txt-1), (const char *)"%f", posctl.calib_axis2_lenma);
 	gtk_entry_set_text (GTK_ENTRY(e_cal_a2lenma), txt);
 
+	gtk_entry_set_text (GTK_ENTRY(e_posdevice), posctl.GetDevice().c_str());
 	strfromd (txt, sizeof(txt-1), (const char *)"%f", posctl.out[0]);
 	gtk_label_set_text(GTK_LABEL(a1_out), txt);
 	strfromd (txt, sizeof(txt-1), (const char *)"%f", posctl.out[1]);
@@ -598,7 +599,7 @@ void PosCtl::Loop (int posx, int posy) {
 
 
 void PosCtl::SetDevice (std::string d) {
-	printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
+	printf ("%s:%d %s new device:%s\n", __FILE__, __LINE__, __FUNCTION__, d.c_str());
 	OutputClose();
 	device = d;
 };
@@ -613,19 +614,50 @@ void PosCtl::OutputClose() {
 
 void PosCtl::OutputOpen() {
 	printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
+	if (device_fd > 0) return;
+
+	device_fd = open (device.c_str(), O_RDWR);
+	if (device_fd < 0) {
+		printf ("%s:%d could not open device:%s Error:%s\n", __FILE__, __LINE__,
+				device.c_str(), strerror(errno));
+	}
 };
 
 
 void PosCtl::OutputWriteValue (int axis, double value) {
+	char outbuf[255];
+	ssize_t len;
 	printf ("%s:%d %s   Axis %d   Value:%f\n", __FILE__, __LINE__, __FUNCTION__, axis, value);
-}
+
+	if (device_fd <= 0) OutputOpen();
+
+	//
+	// save language setting and set to plain C
+	std::string s = setlocale(LC_ALL, NULL);
+	setlocale (LC_ALL, "C");
+
+	snprintf(outbuf, 254, "FIXME: dd:%f\n", value);
+	outbuf[254] = 0;
+
+	// reset language setting to default
+	setlocale (LC_ALL, s.c_str());
+
+	len = write (device_fd, outbuf, strlen(outbuf));
+	if ((size_t) len != strlen(outbuf) || len < 0)
+		printf ("%s:%d could not open device:%s Error:%s\n", __FILE__, __LINE__,
+				device.c_str(), strerror(errno));
+};
 
 void PosCtl::OutputWriteStop (int axis) {
 	printf ("%s:%d %s   Axis %d\n", __FILE__, __LINE__, __FUNCTION__, axis);
+
+	if (device_fd <= 0) OutputOpen();
 }
 
 void PosCtl::OutputWriteStart (int axis) {
 	printf ("%s:%d %s   Axis %d\n", __FILE__, __LINE__, __FUNCTION__, axis);
+
+	if (device_fd <= 0) OutputOpen();
 }