Function fxOpenSerial

tools/serial2xsbug/serial2xsbug_lin.c:124–186

}

void fxOpenSerial(txSerialTool self)
{
	speed_t speed;
	struct termios term;

	self->serialConnection = open(self->path, O_RDWR | O_NOCTTY | O_NDELAY);
	if (self->serialConnection < 0) {
		if (!self->reconnecting)
			mxThrowElse(self->serialConnection >= 0);
		return;
	}
	fcntl(self->serialConnection, F_SETFL, 0);
	switch (self->baud) {
	case 921600: speed = B921600; break;
	case 460800: speed = B460800; break;
	case 230400: speed = B230400; break;
	case 115200: speed = B115200; break;
	case 57600: speed = B57600; break;
	case 38400: speed = B38400; break;
	case 19200: speed = B19200; break;
	case 9600: speed = B9600; break;
	default: speed = BOTHER; break;
	}
	// we need a raw terminal, start with zeroed termios and set all fields
	// it's possible that using tcgetattr and then overriding everything is safer, hard to tell
	memset(&term, 0, sizeof(term));
	term.c_cflag = CS8 | CLOCAL | CREAD;
	term.c_iflag = IGNPAR;
	term.c_oflag = 0;
	term.c_lflag = 0;
	term.c_cc[VTIME] = 0;
	term.c_cc[VMIN] = 1;
	cfsetspeed(&term, speed == BOTHER ? B115200 : speed); // adjust below in case of BOTHER
	mxThrowElse(tcsetattr(self->serialConnection, TCSANOW, &term) == 0);
	tcflush(self->serialConnection, TCIFLUSH);

	// prevent interference by ModemManager, et. al.
	ioctl(self->serialConnection, TIOCEXCL, NULL);

	// handle non-standard speeds
	if (speed == BOTHER) {
		struct termios2 tio2;
		ioctl(self->serialConnection, TCGETS2, &tio2);
		tio2.c_cflag &= ~CBAUD;
		tio2.c_cflag |= BOTHER;
		tio2.c_ispeed = self->baud;
		tio2.c_ospeed = self->baud;
		ioctl(self->serialConnection, TCSETS2, &tio2);
	}
	usleep(5000);

	if (self->programming) {
		if (self->traceCommands)
			fprintf(stderr, "### programming mode\n");
		fxProgrammingModeSerial(self);
		exit(0);
	}