User`s manual

Software Manual • EKF Intelligent I/O Controller Family On CompactPCI
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EKF16550_DSR_HANDSHAKE:
Use the modem signal CTS, DCD or DSR respectively for output flow control.
If the corresponding modem line(s) found as cleared, the controller will hold
data transmission.
EKF16550_DSR_SENSITIVITY:
Ignore any character arriving when the DSR line is not set.
EKF16550_ERROR_ABORT:
If there exists an error condition the controller will send an error message to
the host to indicate this.
FlowReplace:
A set of flags defining flow control stuff:
EKF16550_AUTO_TRANSMIT:
Use the XON/XOFF protocol based flow control for output. The reception of
the XoffChar will stop data transmission until the XonChar is received (see also
structure EKF16550_CHARS).
EKF16550_AUTO_RECEIVE:
Use the XON/XOFF protocol based flow control for input. The XoffChar is send
by the controller if the receive buffer reaches the programmed high water
mark. If the receive buffer falls below the programmed low water mark, the
XonChar is send. See also description of XonLimit and XoffLimit and of
structure EKF16550_CHARS.
EKF16550_ERROR_CHAR:
If set, the ErrorChar is placed in the stream of received characters on error
conditions like buffer overflow, frame errors and so on. See also description of
structure EKF16550_CHARS.
EKF16550_NULL_STRIPPING:
If set, the reception of a NULL character is ignored.
EKF16550_BREAK_CHAR:
If set, the BreakChar is placed in the stream of received characters when a
break condition was detected. See also description of structure
EKF16550_CHARS.
EKF16550_RTS_HANDSHAKE:
Use the modem signal RTS for input flow control. The RTS line is cleared by
the controller if the receive buffer reaches the programmed high water mark.
See also description of XonLimit and XoffLimit.
XonLimit:
When there are less than XonLimit number of characters in the read buffer the
controller will perform all flow control that the host has enabled so that the sender will
resume sending characters.
XoffLimit:
When there are more characters than (BufferSize - XoffLimit) in the read buffer then
the controller will perform all flow control that the host has enabled so that the sender
will stop sending characters.