/// <summary>
/// Open the port using a specified set of options
/// </summary>
public bool Open(SerialPortOptions options)
{
if (IsOpened)
{
return(false);
}
if (!File.Exists(device))
{
return(false);
}
port = open(device, O_RDWR | O_NOCTTY);
if (IsClosed)
{
return(false);
}
UpdatePort(options);
return(true);
}
/// <summary>
/// Update the port settings using a set of options
/// </summary>
/// <remarks>See https://github.com/pyserial/pyserial/blob/master/serial/serialposix.py</remarks>
private void UpdatePort(SerialPortOptions options)
{
var term = new TermiosStruct();
tcgetattr(port, ref term);
term.c_cflag |= CLOCAL | CREAD;
term.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ISIG | IEXTEN);
term.c_oflag &= ~(OPOST | ONLCR | OCRNL);
term.c_iflag &= ~(INLCR | IGNCR | ICRNL | IGNBRK | INPCK | ISTRIP);
term.c_cflag &= ~(CBAUD | CBAUDEX | CSIZE);
switch (options.Baud)
{
case (Baud300):
term.c_cflag |= B300;
break;
case (Baud1200):
term.c_cflag |= B1200;
break;
case (Baud2400):
term.c_cflag |= B2400;
break;
case (Baud4800):
term.c_cflag |= B4800;
break;
case (Baud9600):
term.c_cflag |= B9600;
break;
case (Baud19200):
term.c_cflag |= B19200;
break;
case (Baud38400):
term.c_cflag |= B38400;
break;
case (Baud57600):
term.c_cflag |= B57600;
break;
case (Baud115200):
term.c_cflag |= B115200;
break;
case (Baud230400):
term.c_cflag |= B230400;
break;
default:
term.c_cflag |= B9600;
break;
}
switch (options.DataBits)
{
case (Bits5):
term.c_cflag |= CS5;
break;
case (Bits6):
term.c_cflag |= CS6;
break;
case (Bits7):
term.c_cflag |= CS7;
break;
case (Bits8):
term.c_cflag |= CS8;
break;
default:
term.c_cflag |= CS8;
break;
}
if (options.Parity == Parity.Odd)
{
term.c_cflag |= PARENB | PARODD;
}
else if (options.Parity == Parity.Even)
{
term.c_cflag &= ~PARODD;
term.c_cflag |= PARENB;
}
else
{
term.c_cflag &= ~(PARENB | PARODD);
}
if (options.StopBits == StopBits.One)
{
term.c_cflag &= ~CSTOPB;
}
else
{
term.c_cflag |= CSTOPB;
}
term.c_iflag &= ~(IXON | IXOFF);
term.c_cflag &= ~CRTSCTS;
if (options.FlowControl.HasFlag(FlowControl.XOn))
{
term.c_iflag |= IXON;
}
if (options.FlowControl.HasFlag(FlowControl.XOff))
{
term.c_iflag |= IXOFF;
}
if (options.FlowControl.HasFlag(FlowControl.RequestToSend))
{
term.c_cflag |= CRTSCTS;
}
term.c_cc5 = options.Timeout;
term.c_cc6 = options.Min;
tcsetattr(port, TCSANOW, ref term);
}
