National Instruments Interface Device NI PCI-1426 - Manual (Page 20)

Chapter 2 Hardware Overview
© National Instruments Corporation 2-9 NI PCI-1426 User Manual
Serial Interface
The NI 1426 provides serial connections to and from the camera through
two LVDS pairs in the Camera Link cable. All Camera Link serial
communication uses one start bit, one stop bit, no parity, and no hardware
handshaking.
The NI 1426 supports the following baud rates: 56000, 38400, 19200,
9600, 7200, 4800, 3600, 2400, 2000, 1800, 1200, 600, and 300 bps.
You can use the serial interface interactively with MAX and
clsercon.exe , or programmatically with LabVIEW and C.
Interactively:
• MAX—Use MAX with a camera file containing preprogrammed
commands. When an acquisition is initiated, the commands are sent to
the camera.
• clsercon.exe —Use the National Instruments terminal emulator for
Camera Link, clsercon.exe , if a camera file with preprogrammed
serial commands does not exist for your camera. With
clsercon.exe , you can still communicate serially with your
camera. Go to <NI-IMAQ>\bin to access clsercon.exe .
Programmatically:
• LabVIEW—Use the serial interface programmatically, through calls
to the NI-IMAQ driver using the IMAQ Serial Write and IMAQ Serial
Read VIs. Go to
<LabVIEW>\vi.lib\vision\driver\
imaqll.llb to access these files.
• C—Use the serial interface programmatically, through calls to the
NI-IMAQ driver using
imgSessionSerialWrite and
imgSessionSerialRead .
Note IMAQ Serial Read, IMAQ Serial Write, clsercon.exe ,
imgSessionSerialRead , and imgSessionSerialWrite are used for directly
accessing the NI 1426 serial port and are not required for most users.
National Instruments also fully supports the recommended serial API
described in the Specifications of the Camera Link Interface Standard for
Digital Cameras and Frame Grabbers manual. This manual is available on
several websites, including the Automated Image Association Web site at
www.machinevisiononline.org .