Rockwell Automation 6182 SDK User Manual

Page 96

4–56

RAC6182-Specific Extensions to the CE API

Publication 6182-UM002B-EN-P

Macro

Description

IOCTL_SERIAL_SET
_PORT_MODE

Sets the electrical interface for the specified serial
port. Note that only COM1 supports switching
electrical interfaces.

lpInBuffer should point to a caller allocated WORD
containing the code for the desired electrical
interface. The possible codes are represented by
the following macros defined in othersdk.h:

SERIAL_MODE_RS232
SERIAL_MODE_RS485
SERIAL_MODE_RS422

nInBufferSize should be sizeof(WORD).

IOCTL_SERIAL_
QUERY_PORT_
MODE

Returns the current electrical interface setup for the
specified serial port.

lpOutBuffer should point to a caller allocated WORD
where the code for the current mode will be stored.
The value of *lpOutBuffer can be decoded by
comparison with one of the following macros:

SERIAL_MODE_RS232
SERIAL_MODE_RS485
SERIAL_MODE_RS422

nOutBufferSize should be sizeof(WORD).

IOCTL_SERIAL_
ENABLE_TX_FIFO

Enable the transmit FIFO buffer for the specified
serial port. Note that this is a 16 byte buffer.

lpInBuffer should point to a caller allocated BOOL,
which should contain TRUE or FALSE as required to
enable or disable the FIFO.

nInBufferSize should be sizeof(BOOL).

IOCTL_SERIAL_
ENABLE_RX_FIFO

Enable the receiver FIFO buffer for the specified
serial port. Note that this is a 16 byte buffer.

LpInBuffer should point to a caller allocated BOOL,
which should contain TRUE or FALSE as required to
enable or disable the FIFO.

NInBufferSize should be sizeof(BOOL).

IOCTL_SERIAL_
SET_TX_FIFO_
WATERMARK