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Chapter 1 Introduction © National Instruments Corporation 1-7 Mult ifunction Reconfigurable I/O User Manual Note If you use the device without the FPGA M odule, you can use the RIO Device Setup utility , available by sel…
Chapter 1 Introduction
Multifunction Reconfigurable I/O User Manual 1-6 ni.com
The FPGA does not retain the VI when the device is powered off, so you
must reload the VI each time you power on the device. You can load the VI
from onboard Flash memory or from software over the bus interface. One
advantage to using Flash memory is that the VI can start executing almost
immediately after power up, instead of waiting for the computer to
completely boot and load the FPGA VI. Refer to the LabVIEW Help for
more information about how to store your VI in Flash memory.
Reconfigurable I/O Applications
You can use the LabVIEW FPGA Module to create or acquire new VIs
for your application. The FPGA Module allows you to define custom
functionality for your device using a subset of LabVIEW functionality.
Refer to the examples, available in LabVIEW by selecting Help»Find
Examples, and then selecting Hardware Input and Output»R Series, for
examples of FPGA VIs.
Software Development
You can use LabVIEW with the LabVIEW FPGA Module to program your
device. To develop real-time applications that control your device, use
LabVIEW with the LabVIEW Real-Time Module.
LabVIEW FPGA Module
The LabVIEW FPGA Module enables you to use LabVIEW to create VIs
that run on the FPGA of the R Series target device. Use the FPGA Module
VIs and functions to control the I/O, timing, and logic of your device and
to generate interrupts for synchronization. Select Help»Search the
LabVIEW Help to view the LabVIEW Help. In the LabVIEW Help, use the
Contents tab to browse to the FPGA Interface book for more information
about the FPGA Interface functions.
You can use Interactive Front Panel Communication to communicate
directly with the FPGA VI running on the FPGA target. You can use
Programmatic FPGA Interface Communication to programmatically
control and communicate with FPGA VIs from host VIs.
Use the FPGA Interface functions when you target LabVIEW for Windows
or an RT target to create host VIs that wait for interrupts and control the
FPGA by reading and writing the FPGA VI running on your device.
Chapter 1 Introduction
© National Instruments Corporation 1-7 Multifunction Reconfigurable I/O User Manual
Note If you use the device without the FPGA Module, you can use the RIO Device Setup
utility, available by selecting Start»All Programs»National Instruments»
NI-RIO»RIO Device Setup to download precompiled FPGA VIs to the Flash memory of
the device. This utility installs with NI-RIO. You also can use the utility to configure the
analog input mode, to synchronize the clock on the device to the PXI clock (for PXI-78xx
only), and to configure when the VI loads from Flash memory. For more information about
using the RIO Device Setup utility, refer to the RIO Device Setup Help, found at Start»All
Programs»National Instruments»NI-RIO»
RIO Device Setup Help.
LabVIEW Real-Time Module
The LabVIEW Real-Time Module extends the LabVIEW development
environment to deliver deterministic, real-time performance.
You can write host VIs that run in Windows or on RT targets to
communicate with FPGA VIs that run on your device. You can develop
real-time VIs with LabVIEW and the LabVIEW Real-Time Module, and
then download the VIs to run on a hardware target with a real-time
operating system. The LabVIEW Real-Time Module allows you to use
your device in RT Series PXI systems being controlled in real time by a VI.
The PCI/PXI-781x is designed as a single-point DIO complement to the
LabVIEW Real-Time Module. The PCI/PCIe/PXI-783x/784x/785x is
designed as a single-point AI, AO, and DIO complement to the
LabVIEW Real-Time Module. Refer to the LabVIEW Help, available by
selecting Help»Search the LabVIEW Help, for more information about
the LabVIEW Real-Time Module.
Chapter 1 Introduction
Multifunction Reconfigurable I/O User Manual 1-8 ni.com
Cables and Accessories
NI offers a variety of products you can use with NI 78xx devices, including
cables, connector blocks, and other accessories, as shown in Table 1-3.
Refer to Appendix A, Connecting I/O Signals, for more information
about using these cables and accessories to connect I/O signals to your
device. Refer to
ni.com/products or contact the sales office nearest to
you for the most current cabling options.
Custom Cabling
NI offers a variety of cables for connecting signals to your device. If you
need to develop a custom cable, a nonterminated shielded cable is available
from NI. The SHC68-NT-S connects to the NI 78xx VHDCI connectors on
one end of the cable. The other end of the cable is not terminated. This cable
Table 1-3. Connectivity Options
Cable
Connector
Accessory DescriptionNI 781x
NI 783x/
784x/785x
SHC68-68-RMIO
(NI Recommended)
— 0 SCB-68 High-performance shielded cable
wired specifically for signal
connection from the RMIO
connector
*
to the SCB-68 terminal
block to provide higher signal
integrity and noise immunity.
SHC68-68-RDIO
(NI Recommended)
0, 1, 2, 3 1, 2
†
SCB-68 High-performance shielded cable
wired specifically for signal
connection from the
RDIO connector
*
to the SCB-68
terminal block to provide higher
signal integrity and noise immunity.
SH68-C68-S 0, 1, 2, 3 1, 2
†
SCB-68 Basic shielded cable for signal
connection from the RMIO or
RDIO connector to the SCB-68
terminal block for noise reduction.
*
For a diagram of the twisted pairs in the SHC68-68-RMIO and SHC68-68-RDIO cables and the signals to which they
correspond, go to
ni.com/info and enter the info code rdrmio.
†
PCI/PXI-7830 does not have Connector 2.