Chapter 2
Hardware Overview
NI PCIe-1427 User Manual
2-10
ni.com
Start Conditions
The NI 1427 can start acquisitions in the following ways:
•
Software control
—The NI 1427 supports software control of
acquisition start. You can configure the NI 1427 to capture a fixed
number of frames. Use this configuration for capturing a single frame
or a sequence of frames.
•
Trigger control
—You can start an acquisition by enabling external or
RTSI bus trigger lines. Each of these inputs can start a video
acquisition on a rising edge or a falling edge.
Serial Interface
The NI 1427 provides serial communication 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 1427 supports the following baud rates: 115200, 56000, 38400,
19200, 9600, 7200, 4800, 3600, 2400, 2000, 1800, 1200, 600, and 300 bps.
You can use the serial interface interactively with MAX,
clsercon.exe
,
or a manufacturer supplied camera control utility, 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 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.
From the
<NI-IMAQ>\bin
directory, access
clsercon.exe
.
•
Manufacturer Supplied Camera Control Utility
—Camera
manufacturers who are compliant with the Camera Link 1.1 or later
specification provide a camera control utility which sends the
appropriate serial commands for configuring your camera through the
NI 1427 serial port.
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