/// <summary>
/// Open the serial port
/// </summary>
public void Open()
{
if (IsOpen)
{
throw new IOException($"Port already open");
}
// open serial port
int fd = Libc.open(_PortName, Libc.OpenFlags.O_RDWR | Libc.OpenFlags.O_NONBLOCK);
if (fd == -1)
{
throw new Exception($"failed to open port ({_PortName})");
}
_FileDescriptor = fd;
// Initilise the serial port
Termios termios = GetTermios();
// Make sure we are ok to read
termios.ControlFlag |= (uint)ControlFlags.CREAD;
termios.ControlFlag |= (uint)ControlFlags.CLOCAL;
//Clean the output flags
termios.OutputFlag &= ~(uint)OutputFlags.OPOST;
// Clear what can be on the input flags
termios.InputFlag &= ~(uint)(InputFlags.IGNBRK | InputFlags.BRKINT | InputFlags.ICRNL |
InputFlags.PARMRK | InputFlags.INLCR | InputFlags.ISTRIP | InputFlags.IXON);
// Set ICANON off
termios.LocalFalg &= ~(uint)LocalFlags.ICANON;
// Set ECHO off
termios.LocalFalg &= ~(uint)LocalFlags.ECHO;
termios.LocalFalg &= ~(uint)LocalFlags.ECHOE;
termios.LocalFalg &= ~(uint)LocalFlags.ECHOCTL;
termios.LocalFalg &= ~(uint)LocalFlags.IEXTEN;
termios.LocalFalg &= ~(uint)LocalFlags.ISIG;
SetTermios(termios);
SetBaudRate(_BaudRate);
SetDataBits(_DataBits);
SetParity(_Parity);
SetStopBits(_StopBits);
// start reading
Task.Run((Action)StartReading, _CancellationToken);
}
public void Open()
{
// open serial port
int fd = Libc.open(portName, Libc.OpenFlags.O_RDWR | Libc.OpenFlags.O_NONBLOCK);
if (fd == -1)
{
throw new Exception($"failed to open port ({portName})");
}
// set baud rate
byte[] termiosData = new byte[256];
Libc.tcgetattr(fd, termiosData);
Libc.cfsetspeed(termiosData, baudRate);
Libc.tcsetattr(fd, 0, termiosData);
// start reading
Task.Run((Action)StartReading, CancellationToken);
this.fd = fd;
}