NI 7931R User manual

FlexRIOTM
NI-7931R/7932R/7935R User Manual
NI-793xR User Manual
August 2015
375181B-01

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© National Instruments |vii
Contents
About This Manual
Related Documentation .................................................................................................... xi
Xilinx Documentation .............................................................................................. xiii
Additional Resources................................................................................................ xiv
Chapter 1
Before You Begin
Development Requirements ............................................................................................. 1-1
Xilinx Licensing Information ........................................................................................... 1-2
Chapter 2
Mounting the NI-793xR
Mounting the NI-793xR Directly on a Flat Surface................................................. 2-3
Installing the Rubber Feet......................................................................................... 2-4
Chapter 3
Hardware Architecture
NI-7931R .......................................................................................................................... 3-1
NI-7931R Key Features............................................................................................ 3-4
Clocking Architecture............................................................................................... 3-5
NI-7932R .......................................................................................................................... 3-6
NI-7932R Key Features............................................................................................ 3-9
Clocking Architecture............................................................................................... 3-11
NI-7935R .......................................................................................................................... 3-12
NI-7935R Key Features............................................................................................ 3-15
Clocking Architecture............................................................................................... 3-16
Chapter 4
Developing with LabVIEW FPGA
Developing with LabVIEW FPGA................................................................................... 4-1
Adding the NI-793xR to a LabVIEW Project .......................................................... 4-1
Adding an Adapter Module to the Target......................................................... 4-1
Adding Items to the NI-793xR Target.............................................................. 4-2
Adding NI-793xR Target I/O ................................................................................... 4-2
Configuring a 10 MHz Reference Clock.................................................................. 4-2
Auto-loading Bitfiles on Power-up........................................................................... 4-3
Interactive Front Panel Communication................................................................... 4-3
Using the NI Common Instrument Design Libraries................................................ 4-4
Using niInstr Instruction Framework ............................................................... 4-4
Streaming Overview ......................................................................................... 4-4
CLIP Adapters Overview ................................................................................. 4-4

Contents
viii |ni.com
Data Trigger Overview ..................................................................................... 4-4
Basic Elements Overview ................................................................................. 4-5
Memory Overview............................................................................................ 4-5
Compiling LabVIEW FPGA VIs..............................................................................4-5
Download, Reset, and Run Side Effects in the LabVIEW FPGA Host Interface ....4-5
Streaming .................................................................................................................. 4-6
Flow Control ..................................................................................................... 4-6
DMA Streaming................................................................................................ 4-7
Simulating FPGA Behavior ...................................................................................... 4-8
Chapter 5
Programming the High-Speed Serial Ports
Development Flow............................................................................................................ 5-1
Developing MGT Socketed CLIP.....................................................................................5-2
Socketed CLIP Architecture ..................................................................................... 5-2
Accessing the Xilinx Vivado Tools .......................................................................... 5-3
Generating an IP Core from the Xilinx Vivado IP Catalog ...................................... 5-4
Modifying Third-Party IP Core Logic ..............................................................5-4
Building a Netlist from the IP Core .................................................................. 5-5
Writing a VHDL Wrapper Around the Protocol IP Core ......................................... 5-7
Constraints and Hierarchy ................................................................................ 5-8
Documenting Your IP ....................................................................................... 5-9
Adding MGT Socketed CLIP to the LabVIEW Project ...................................................5-9
Configuring MGT Socketed CLIP in the NI-793xR LabVIEW FPGA Targets....... 5-10
Using Existing VHDL IP inside CLIP or IPIN.........................................................5-11
Improving Performance in Larger Designs through Enable Chain Removal........... 5-11
Chapter 6
Programming with the Real-Time Target
Best Practices .................................................................................................................... 6-1
Key Concepts ....................................................................................................................6-1
Installing and Configuring the NI-793xR.........................................................................6-2
Creating a Real-Time Application ....................................................................................6-2
Real-Time System Integration .......................................................................................... 6-3
Querying Fan Speed and Temperature Sensors ........................................................ 6-3
Power/Thermal Protection and Shutdown ................................................................6-4
LabVIEW System Configuration API ...................................................................... 6-4
Communicating with Applications on an RT Target........................................................6-5
Front Panel Communication ..................................................................................... 6-5
Network Communication..........................................................................................6-6
Where to Go from Here .................................................................................................... 6-6
LabVIEW Help ......................................................................................................... 6-6
LabVIEW Real-Time Module Release and Upgrade Notes.....................................6-7

NI-793xR User Manual
© National Instruments |ix
Appendix A
CLIP Signals
Appendix B
Using the Fan
Appendix C
NI Services
Glossary

© National Instruments |xi
About This Manual
The NI-7931R/7932R/7935R User Manual describes how to use the NI-7931R, NI-7932R, and
NI-7935R controllers for FlexRIO to develop high-performance embedded applications.
This manual provides detailed information about the electrical and mechanical requirements of
component-level IP (CLIP) and LabVIEW FPGA design.
Related Documentation
The following documents contain information that you may find helpful as you read this manual.
Table 1. Documentation Overview
Document Location Description
Getting started
guide for your
controller for
FlexRIO
Available from the Start menu
(Start»All Programs»National
Instruments»NI FlexRIO) and
at ni.com/manuals.
Contains information about
installing, configuring, and
troubleshooting your controller
for FlexRIO.
Specifications for
your controller for
FlexRIO
Contains specifications for your
controller for FlexRIO.
FlexRIO Help Contains information about the
controller for FlexRIO front
panel connectors and I/O,
programming instructions, and
adapter module
component-level IP (CLIP).
LabVIEW
High-Performance
FPGA Developer’s
Guide
Available at ni.com/
tutorial.
Summarizes the most effective
techniques for optimizing
throughput, latency, and FPGA
resources when using the
LabVIEW FPGA Module and
the RIO hardware platform.

About This Manual
xii |ni.com
FPGA Module Help This document is a book within
the LabVIEW Help. Access this
document by navigating to
Start»All Programs»National
Instruments»LabVIEW 201x»
LabVIEW 201x Help, or by
searching for FPGA Module
Help at ni.com/manuals.
Browse to the FPGA Module
book in the Contents tab for
information about using the
LabVIEW FPGA Module.
With the LabVIEW FPGA
Module and LabVIEW, you can
create VIs that run on National
Instruments FPGA targets.
The Getting Started with the
LabVIEW FPGA book provides
links to the top resources that
you can use to get started with
LabVIEW FPGA.
The Integrating Third-Party IP
(FPGA Module) book contains
information about adding
custom HDL code to your
LabVIEW project.
Real-Time Module
Help
This document is a book within
the LabVIEW Help. Access this
document by navigating to
Start»All Programs»National
Instruments»LabVIEW 201x»
LabVIEW 201x Help, or by
searching for Real-Time Module
Help at ni.com/manuals.
Browse to the Real-Time
Module book in the Contents
tab for information about using
the LabVIEW Real-Time
Module.
The Real-Time Module
combines LabVIEW graphical
programming with the power of
a real-time operating system,
enabling you to build real-time
applications. Use this help to
access information about
real-time programming
concepts, step-by-step
instructions for using LabVIEW
with the Real-Time Module,
reference information about
Real-Time Module VIs and
functions, and information
about LabVIEW features on
real-time operating systems.
LabVIEW FPGA
Module Release and
Upgrade Notes
Available at ni.com/
manuals. You can also view
this document by selecting
Start»All Programs»National
Instruments»LabVIEW»
LabVIEW Manuals.
Contains information
about installing the
LabVIEW FPGA Module,
describes new features, and
provides upgrade information.
Table 1. Documentation Overview (Continued)
Document Location Description

NI-793xR User Manual
© National Instruments |xiii
Xilinx Documentation
Xilinx FPGA documentation provides information required for the successful development of
your controller for FlexRIO. The following table provides a list of specific Xilinx documentation
resources.
All Xilinx documentation can be found at www.xilinx.com.
Table 2. Xilinx Documentation
Document Document Part Number Description
7 Series FPGAs Overview DS180 Outlines the features and
product selection of the
Xilinx 7 series FPGAs,
including Kintex-7 devices.
Kintex-7 FPGAs Data
Sheet: DC and AC Switching
Characteristics
DS182 Contains the DC and AC
switching characteristic
specifications for the
Kintex-7 FPGAs.
Vivado Design Suite:
Release Notes, Installation,
and Licensing
UG973 Provides an overview of the
new release of the Vivado
Design Suite, including
information on new and
changed features,
installation requirements for
the software, and licensing
information.
High-Speed Serial I/O Made
Simple: A Designer’s Guide,
with FPGA Applications
—Recommended for users
new to high-speed serial.
7 Series FPGAs GTX/GTH
Transceivers User Guide
UG476 Technical reference
describing the 7 series
FPGAs GTX/GTH
transceivers.
Vivado Design Suite User
Guide: Using Constraints
UG903 Describes using Xilinx
Design Constraints (XDC)
in Vivado tools.

About This Manual
xiv |ni.com
Additional Resources
Table 3. FlexRIO Development Resources
Development
Resource Location Description
FlexRIO website ni.com/flexrio Contains information about
FlexRIO devices,
application areas, and
technical resources.
FlexRIO Instrument
Development Library
https://decibel.ni.com/
content/docs/DOC-15799
The FlexRIO Instrument
Development Library is a set
of host and FPGA code that
provides FPGA capabilities
commonly found in
instruments such as
acquisition engines, DRAM
interfaces, and trigger logic,
along with the associated
host APIs.
LabVIEW examples Available in NI Example Finder.
In LabVIEW, click Help»Find
Examples»Hardware Input
and Output»FlexRIO.
Contains examples of how to
run FPGA VIs and Host VIs
on your device.
IPNet ni.com/ipnet Contains LabVIEW FPGA
functions and intellectual
property to share.

© National Instruments |1-1
1
Before You Begin
This section contains information you need before developing high-performance embedded
applications using the NI-7931R, NI-7932R, and NI-7935R devices.
Development Requirements
Successful system design with the NI-793xR devices may require knowledge in the following
areas, depending on your application.
• Real-time programming
• VHDL code design
• LabVIEW and LabVIEW FPGA programming
If you are unfamiliar with any of these concepts, refer to the following table for a list of resources
for learning the fundamentals required for NI-793xR development.
Table 1-1. Fundamentals Resources
Concept Resources
Real-time programming Real-time programming courses are
available at ni.com/training. You can
also refer to the LabVIEW Real-Time
Module Help at ni.com/manuals.
VHDL code design Some VHDL training or experience is
required before implementing custom
protocols with the high-speed serial
transceivers. Do not attempt to develop
Component-Level IP (CLIP) without
VHDL knowledge. Refer to the FlexRIO
Help for more information about CLIP.
LabVIEW and LabVIEW FPGA
programming
LabVIEW and LabVIEW FPGA training
are available at ni.com/training. You
can also refer to the NI LabVIEW
High-Performance FPGA Developer’s
Guide, available at ni.com/tutorials.

1-2 |ni.com
Chapter 1 Before You Begin
Xilinx Licensing Information
Refer to the Xilinx Documentation section of About This Manual for a list of Xilinx
documentation that contains important Xilinx licensing information.

© National Instruments |2-1
2
Mounting the NI-793xR
This section contains information about mounting the NI-793xR devices.
Note Before you begin mounting the NI-793xR, refer to the getting started guide
for your NI-793xR for instructions about wiring power to the NI-793xR, powering
on the NI-793xR, and connecting the NI-793xR to a host computer.
Caution The NI-793xR mounting orientation is not restricted; however, when
mounting the NI-793xR upside-down, ensure that the FlexRIO adapter module is
supported if you expect shock greater than 30 g/11 ms.
Caution In order to obtain the maximum allowable ambient temperature as
specified in your device’s specifications document, you must maintain at least 1 in.
of clearance on either side of the NI-793xR. Refer to Figure 2-1 for fan clearance
information.
Figure 2-1. Fan Clearance
Keep Out
Zone
1.0 in.
(25.4 mm)
1.0 in.
(25.4 mm)

2-2 |ni.com
Chapter 2 Mounting the NI-793xR
You can mount the NI-793xR in a variety of configurations. The following table lists the
ecommended mounting methods.
The following sections contain instructions for the mounting methods. Before using any of these
mounting methods, record the serial number from the back of the device. You will be unable to
read the serial number from the back of the device after you have mounted it.
Caution You must provide physical support for any FlexRIO adapter modules
during the mounting process.
Table 2-1. Mounting Options
Method Required Accessory Kit NI Part Number
Direct mounting — —
Panel Panel Mount Accessory Kit 784365-01

© National Instruments |2-3
NI-793xR User Manual
Mounting the NI-793xR Directly on a Flat Surface
For applications sensitive to shock and vibration, NI recommends mounting the device directly
on a flat, rigid surface using the mounting holes in the device.
You will need the following items to mount the device directly on a flat surface:
• Three screws, M4, 7 mm + thickness of mounting surface
Complete the following steps to mount the device.
1. Use the dimensions shown in Figure 2-2 to drill the holes required for mounting the device.
2. Drill clearance holes 4.5 mm in diameter.
3. Align the device on the surface.
4. Fasten the device to the surface with the screws.
Figure 2-2. NI-793xR Dimensions
2.433
4.400
9.214 in.
6.050 in.
5.137 in.

2-4 |ni.com
Chapter 2 Mounting the NI-793xR
Installing the Rubber Feet
The NI-793xR ships with optional rubber feet. Install the rubber feet to the bottom of the device,
as shown in Figure 2-3.
Caution Do not install rubber feet when directly mounting the NI-793xR. The
rubber feet will prevent full contact between the unit and the mounting surface.
Figure 2-3. Installing the Rubber Feet

© National Instruments |3-1
3
Hardware Architecture
This chapter contains information about the NI-793xR hardware architecture.
NI-7931R
The NI-7931R is an embedded FlexRIO controller with an embedded processor and
reconfigurable FPGA.
Note The NI-7931R hardware does not require calibration.
The following figure shows the NI-7931R front panel connectors. For more information about
the front panel connectors, refer to your device’s specifications document and the FlexRIO Help.
For information about connecting the device to a host computer, refer to the NI-7931R Getting
Started Guide.
Figure 3-1. NI-7931R Front Panel Connectors
1TRIG
2REFIN
3µSDcard
4 USB device port
5 USB host
6 1 Gb Ethernet
7LEDindicators
*
8 Reset
9 DC power source†
10 FlexRIO adapter module connector‡
*Refer to Figure 3-2 for LED placement.
†Refer to the NI-7931R Getting Started Guide for instructions about how to wire power to the NI-7931R.
‡Refer to Figure 3-3 for the pinout.
7
34 6
9
58
10
21

3-2 |ni.com
Chapter 3 Hardware Architecture
The following figure shows the NI-7931R LEDs in more detail.
Figure 3-2. NI-7931R LEDs
RT User
LED
Power
LED
Status
LED
FPGA User
LED