Set or get flags that define the modem lines that are used for flow control
HandShake can be set to one of the following values:
|SERIAL_DTR_CONTROL||Enables the DTR line when the device is opened and leaves it on.|
|SERIAL_DTR_HANDSHAKE||Use the modem signal DTR for input flow control. For the real serial port the DTR line is cleared by|
the controller if the receive buffer reaches the programmed high water mark.
See also description of XonLimit and XoffLimit.
|SERIAL_CTS_HANDSHAKE||Use the modem signal CTS, DCD or DSR respectively for output flow control.|
For the real serial port if the corresponding modem line(s) found as cleared, the controller will hold
|SERIAL_DSR_SENSITIVITY||Ignore any character arriving when the DSR line is not set.|
|SERIAL_ERROR_ABORT||If there exists an error condition the driver abort all read and writes to or from|