LabVIEW FPGA polynom

Hello. I have FlexRIO board PXIe-7966R. I'd like to calculate polynom of input data&colon; 0.2139*x^3 - 0.0684*x^2+0.9524*x+0.0085 , where x - is I16 input data.
But i have a problem, that this calculating takes a lot of time - 20MHz. I'd like to execute this operation in single cycle timed loop with 125MHz clock. How can i optimize this operation?

Well, given that the input is an integer there is just a finite number of possible answers to the calculation (65,536 to be precise). Could you do it as a lookup table?
Does your input use the entire 16-bit dynamic range? If not, you might need able to trim that number down a bit.
Mike...
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How can I install (download) a Labview FPGA code onto Altera FPGA chip using Labview FPGA module?

Hi there
Guys i'm a very new labview user (PhD student), my project is about ( design and implementation of a high speed-yet sophisticated system using Labview environment then install this project's code (using Labview FPGA module) onto Altera-made FPGA chip).
so kindly, can any body help me in this?...is there any way to connect labview with Altera FPGA?...please anything would be said 'd be of great benifits
thanks a lot in advance.

as previously mentioned, labview fpga only supports national instruments targets utilizing xilinx fpgas. the hdl generated by labview fpga is encrypted and cannot be used to synthesize a design outside the labview fpga design flow.
however, if you must use labview for your project, it might be possible for you to design the system in labview and use one of the labview embedded modules ( http://www.ni.com/embedded )to generate c code which you can then port to systemc and compile for the altera fpga. i'm not saying it will be easy, but it should be possible.

How to import Verilog codes into LabVIEW FPGA?

I tried to import Verilog code by instantiation followed by the instruction in http://digital.ni.com/public.nsf/allkb/7269557B205B1E1A86257640000910D3,
but still I can see some errors while compiling the VI file.
Simple test Verilog file is as follows:
==============================
module andtwobits (xx, yy, zz);
input xx, yy;
output reg zz;
always @(xx,yy) begin
zz <= xx & yy;
end
endmodule
==============================
and after following up the above link, we created the instantiation file as
==============================================
library ieee;
use ieee.std_logic_1164.all;
entity mainVHDL is
port(
xxin: in std_logic;
yyin: in std_logic;
zzout: out std_logic
end mainVHDL;
architecture mainVHDL1 of mainVHDL is
COMPONENT andtwobits PORT (
zz : out std_logic;
xx : in std_logic;
yy : in std_logic);
END COMPONENT;
begin
alu : andtwobits port map(
zz => zzout,
xx => xxin,
yy => yyin);
end mainVHDL1;
==============================================
Sometimes, we observe the following error when we put the indicator on the output port,
ERROR:ConstraintSystem:58 - Constraint <INST "*ChinchLvFpgaIrq*bIpIrq_ms*" TNM =
TNM_ChinchIrq_IpIrq_ms;> [Puma20Top.ucf(890)]: INST
"*ChinchLvFpgaIrq*bIpIrq_ms*" does not match any design objects.
ERROR:ConstraintSystem:58 - Constraint <INST "*ChinchLvFpgaIrq*bIpIrq*" TNM =
TNM_ChinchIrq_IpIrq;> [Puma20Top.ucf(891)]: INST "*ChinchLvFpgaIrq*bIpIrq*"
does not match any design objects.
and interestingly, if we remove the indicator from the output port, it sucessfully compiles on the LabVIEW FPGA.
Could you take a look at and please help me to import Verilog to LabVIEW FPGA?
I've followed the basic steps of instantiation on the above link, but still it won't work.
Please find the attachment for the all files.
- andtwobits.v : original Verilog file
- andtwobits.ngc: NGC file
- andtwobits.vhd: VHD file after post-translate simulation model
- mainVHDL.vhd: instantiation main file
Since there is no example file for Verilog (there is VHDL file, but not for Verilog), it is a bit hard to do the simple execution on LabVIEW FPGA even for the examples.
Thank you very much for your support, and I'm looking forward to seeing your any help/reply as soon as possible.
Bests,
Solved!
Go to Solution.
Attachments:
attach.zip ‏57 KB

Hi,
I am facing problem in creating successfully importing VHDL wrapper file for a Verilog module,into LabVIEW FPGA using CLIP Node method. Please note that:
I am working on platform SbRIO-9606.
Labiew version used is 2011 with Xilinx 12.4 compiler tools
NI RIO 4.0 is installed
Xilinx ISE version installed in PC is also 12.4 webpack ( Though I used before Xilinx 10.1 in PC for generating .ngc file for verilog code FOR SbRIO 9642 platform, but problem remains same for both versions)
Query1. Which versions of Xilinx ISE (to be installed in PC for generating .ngc file) are compatible with Labview 2011.1(with Xilinx 12.4 Compiler tools)? Can any version be used up to 12.4?
Initially I took a basic and gate verilog example to import into LabVIEW FPGA i.e. simple_and.v and its corresponding VHDL file is SimpleAnd_Wrapper.vhd
///////////////// Verilog code of “simple_and.v”//////////////////////
module simple_and(in1, in2, out1);
   input in1,in2;
   output reg out1;
   always@( in1 or in2)
   begin
      out1 <= in1 & in2;
   end
endmodule
/////////////////VHDL Wrapper file code of “SimpleAnd_Wrapper.vhd” //////////////////////
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
ENTITY SimpleAnd_Wrapper IS
    port (
        in1    : in std_logic;
        in2    : in std_logic;
        out1   : out std_logic
END SimpleAnd_Wrapper;
ARCHITECTURE RTL of SimpleAnd_Wrapper IS
component simple_and
   port(
         in1    : in std_logic;
         in2    : in std_logic;
         out1   : out std_logic
end component;
BEGIN
simple_and_instant: simple_and
   port map(
            in1 => in1,
            in2 => in2,
            out1 => out1
END RTL;
Documents/tutorials followed for generating VHDL Wrapper file for Verilog core are:
NI tutorial “How do I Integrate Verilog HDL with LabView FPGA module”. Link is http://digital.ni.com/public.nsf/allkb/7269557B205B1E1A86257640000910D3
In this case, I did not get any vhdl file after “post-translate simulation model step” in netlist project using simple_and.ngc file previously generated through XST. Instead I got was simple_and_translate.v.
Query2. Do I hv to name tht “v” file into “simple_and.vhd”?? Anyways it did not work both ways i.e. naming it as “simple_and with a “v” or “vhd” extension. In end I copied that “simple_and.v” post translate model file, “simple_and.ngc”, and VHDL Wrapper file “SimpleAnd_Wrapper.vhd” in the respective labview project directory.
Query3. The post-translate model file can also be generated by implementing verilog simple_and.v file, so why have to generate it by making a separate netlist project using “simple_and.ngc” file? Is there any difference between these two files simple_and_translate.v generated through separate approaches as I mentioned?
2. NI tutorial “Using Verilog Modules in a Component-Level IP Design”. Link is https://decibel.ni.com/content/docs/DOC-8218.
In this case, I generated only “simple_and.ngc” file by synthesizing “simple_and.v “file using Xilinx ISE 12.4 tool. Copied that “simple_and.ngc” and “SimpleAnd_Wrapper.vhd” file in the same directory.
Query4. What is the difference between this method and the above one?
2. I followed tutorial “Importing External IP into LABVIEW FPGA” for rest steps of creating a CLIP, declaring it and passing data between CLIP and FPGA VI. Link is http://www.ni.com/white-paper/7444/en. This VI executes perfectly on FPGA for the example”simple_and.vhd” file being provided in this tutorial.
Compilation Errors Warnings received after compiling my SimpleAnd_Wrapper.vhd file
Elaborating entity <SimpleAnd_Wrapper> (architecture <RTL>) from library <work>.
WARNING:HDLCompiler:89"\NIFPGA\jobs\WcD1f16_fqu2nOv\SimpleAnd_Wrapper.vhd"    Line 35: <simple_and> remains a black-box since it has no binding entity.
2. WARNING:NgdBuild:604 - logical block 'window/theCLIPs/Component_ dash_Level _IP_ CLIP0/simple_and_instant' with type   'simple_and' could not be resolved. A pin name misspelling can cause this, a missing edif or ngc file, case mismatch between the block name and the edif or ngc file name, or the misspelling of a type name. Symbol 'simple_and' is not supported in target 'spartan6'.
3. ERROR:MapLib:979 - LUT6 symbol   "window/theVI/Component_dash_Level_IP_bksl_out1_ind_2/PlainIndicator.PlainInd icator/cQ_0_rstpot" (output signal=window/theVI/ Component_dash_Level _IP_bksl_out1_ ind_2/PlainIndicator.PlainIndicator/cQ_0_rstpot) has input signal "window/internal_Component_dash_Level_IP_out1" which will be trimmed. SeeSection 5 of the Map Report File for details about why the input signal willbecome undriven.
Query5. Where lays that “section5” of map report? It maybe a ridiculous question, but sorry I really can’t find it; maybe it lays in xilnx log file!
4. ERROR:MapLib:978 - LUT6 symbol "window/theVI/Component_dash_Level_IP_bksl_ out1_ind_2/PlainIndicator.PlainIndicator/cQ_0_rstpot" (output signal= window / theVI/Component_dash_Level_IP_bksl_out1_ind_2/PlainIndicator.PlainIndicator/ cQ_0_rstpot) has an equation that uses input pin I5, which no longer has a connected signal. Please ensure that all the pins used in the equation for this LUT have signals that are not trimmed (see Section 5 of the Map Report File for details on which signals were trimmed). Error found in mapping process, exiting.Errors found during the mapping phase. Please see map report file for more details. Output files will not be written.
Seeing these errors I have reached the following conclusions.
There is some problem in making that VHDL Wrapper file, LabVIEW does not recognize the Verilog component instantiated in it and treat it as unresolved black box.
Query6. Is there any step I maybe missing while making this VHDL wrapper file; in my opinion I have tried every possibility in docs/help available in NI forums?
2. Query7. Maybe it is a pure Xilinx issue i.e. some sort of library conflict as verilog module is not binding to top VHDL module as can be seen from warning HDLCompiler89. If this is the case then how to resolve that library conflict? Some hint regarding this expected issue has been given in point 7 of tutorial “How do I Integrate Verilog HDL with LabView FPGA module”. http://digital.ni.com/public.nsf/allkb/7269557B205B1E1A86257640000910D3. But nothing has been said much about resolving that issue.
3. Because of this unidentified black box, the whole design could not be mapped and hence could not be compiled.
P.S.
I have attached labview project zip folder containing simple_translate.v, simple_and_verilog.vi file,SimpleAnd_Wrapper.xml, Xilinx log file after compilation alongwith other files. Kindly analyze and help me out in resolving this basic issue.
Please note that I have made all settings regarding:
Unchecked add I/O buffers option in XST of Xilinx ISE 12.4 project
Have set “Pack I/O Registers into IOBs” to NO in XST properties of project.
Synchronization registers are also set to zero by default of all CLIP I/O terminals.
Please I need speedy help.Thanking in you in anticipation.
Attachments:
XilinxLog.txt ‏256 KB
labview project files.zip ‏51 KB

Creating multiple tasks in labview fpga

Hi,
I need to create multiple tasks in labview fpga....I need to set one update period in each task so that i can make my while loop run at this rate everytime my input frequency changes....How do i do this?

Hi,
just to be sure: You are talking about multiple tasks on the FPGA to acquire data? Or do you want to have multiple tasks on the host to display the data?

LabVIEW FPGA driver for Xilinx SPARTAN 3E Starter Board

i need drivers for spartan 3E .

If you are at a university that has a site license for the FPGA module, the following might be of interest to you:
Using LabVIEW FPGA with the Xilinx SPARTAN-3E XUP Starter Kit
See also this discussion.
Quote from the license agreement:
...INSTALLATION AND USE OF THE LABVIEW FPGA TARGET MODULE FOR THE XILINX SPARTAN-3E STARTER BOARD (THE “TARGET MODULE”) IS LIMITED TO ACADEMIC INSTITUTIONS THAT HAVE A VALID, CURRENT “ACADEMIC TEACHING LICENSE” FROM NATIONAL INSTRUMENTS FOR THE LABVIEW FPGA MODULE. THIS TARGET MODULE MAY ONLY BE USED FOR INSTRUCTIONAL PURPOSES, SUBJECT TO THE TERMS AND CONDITIONS OF THE NATIONAL INSTRUMENTS SOFTWARE LICENSE AGREEMENT THAT ACCOMPANIES THE SOFTWARE...
LabVIEW Champion . Do more with less code and in less time .

Labview fpga vs xilinx ise

hi all
i am new to fpga and my question is fairly simple one which one is better ?
labview fpga or the xilinx ise platform ?
or does it depend upon the application?
Regards
Solved!
Go to Solution.

It always depends on the application. Better in what way?
I like programming in LabVIEW, so I think LabVIEW FPGA is a much better choice. Learn just a little more than regular LabVIEW and you can program an FPGA! Unless you have experience using ise, I suspect LabVIEW would be the easier route.
If you are looking at price, maybe ise wins. It isn't cheap to get buy LabVIEW and the FPGA module (and probably RT module) so you have all the tools.
If the task is very complex, you might manage to make the program slightly more efficient using a lower level tool like ise. You might shave off a few nanoseconds of loop time. In 99.9% of the cases, this is unlikely. LabVIEW code does a pretty good job converting over to FPGA.
Bruce
Bruce Ammons
Ammons Engineering

Labview FPGA for beginners.

Hello.
I have no idea what labview is and how to work with this. I have had some experience with Xilinx 12.1 EDK (microblaze and VHDL).
I tried to install labview and labview fpga module. It asked for some drivers and I continued, the program said that it will ask for the drivers later.
But, beside that, do you have any training flow to suggest? Should I start with labview or is it not necessary? After that, should I start with CVI or FPGA? I am confused. Any help is welcomed!
Thanks,
Bill.

See this video's to get start with labVIEW and more video's you can find in youtube. Also, get in touch with forum especially about FPGA questions or read the history question targeting to your design area.
http://zone.ni.com/devzone/cda/tut/p/id/7466
I never use FPGA codes or concepts in labVIEW but I am looking to learn now.

Labview fpga module 8.6

I want use labview FPGA modul 8.6 can somebody help me to dowlaond this modul thanks

Hi scream,
It would best contact your account representative within National Instruments, they will be able to determine how to best deliver this module to you. Thanks!
Matt S.
Industrial Communications Product Support Engineer
National Instruments

Labview FPGA called another software component

Hi
I am trying to compile my FPGA code which has previously compiled. I get this error.
"Labview FPGA called another software component, and that component returned the following error:
Error Code: -52009
NI Platform Services: The requested resource has been marked for deletion and is rejecting new requests."
What is this error code?

Hi,
I've been looking in to this for you today - unfortunately, that seems to be a really rare error code which doesn't come up very often on our systems, so there's no quick fix that I can find.
A couple of options:
1) Have you made any changes to the code recently, in terms of updating it from an earlier version of LabVIEW? If so, it may be worth mass compiling your project up to the latest version in case there are references to software components which no longer exist.
2) It's probably worth a try repairing your LabVIEW, FPGA and RIO drivers installations from disk, as described here: http://digital.ni.com/public.nsf/allkb/FE6B641E86E55AF2862576DE00038001?OpenDocument
This could be due to some kind of missing or corrupted component in, for example, the Xilinx Tools
3) Are you referencing any kind of external software, such as DLLs or third party instruments, in your file?
4) What hardware are you using?
Please let me know how you get on with these queries.
Best wishes,
Chiara A
Applications Engineer with NI UK & Ireland

Labview fpga development board

hi all
can i programme my own development board having xillinx fpga using labview fpga .. or lab view fpga can only be used by national instruments hardware ?
Regards

Just to reiterate what was already said, The LabVIEW FPGA generates VHDL code that can not be used or downloaded into non-NI hardware, even if it uses the same Xilinx FPGA.
That being said, there is one board that you can use that is not National Instruments, Xilinx SPARTAN-3E XUP Starter Kit
Regards,
Andrew Eddleman
National Instruments
RIO Embedded Hardware PSE
CompactRIO Developers Guide

Labview fpga with nexys 2

hi my friends I want to know I can use labview FPGA with nexys 2 and there are some device about this FPGA (nexys 2) because we have this circuit board and we want to do the project with labview you can found some information about nexys 2 in this file and thank you for your help
Attachments:
Nexys2_rm.pdf ‏986 KB

Hello,
As this forum thread states, LabVIEW FPGA is only for the SPARTAN-3E XUP Starter Board and NI Reconfigurable I/O devices. Even though the nexys 2 is based from the Spartan 3E, we can’t be sure that the driver that we release for the Spartan 3E starter board works for the nexys 2.
Regards,
Daniel REDS
RF Systems Engineer
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Labview FPGA 1.0 or 1.1

Hi.
Does anyone have an evaluation version of LabVIEW FPGA 1.0 or 1.1 ?

Hi lukasdev,
Do I undesrtand it right that you are searching for an old version of FPGA module to LabVIEW? If I'm right, unfortunately I can't help you with providing this. Can you please share some details for which project you need LabVIEW FPGA? Hopefully I will be able to help you some other way.
Thank you, regards
Jakub Prokeš
NIEE Aplications Engineer

LabVIEW FPGA PMW modulation for L298n H-bridge

Hello to everyone,
I am new in LabVIEW FPGA programing and I have a couple questions, so I would be grateful if you could answer me. For my final work I have to control the speed and direction of DC motor using sb-RIO 9636 and H-bridge L298n. In attachments you can find scheme of the H- bridge and my program. I have conected In1(pin 5 of L298n) to digital pin 1 of the card, In2(pin 7 of L298n) to digital pin 2 of the card and changing the state of the pin I change the direction of the motor(I know that the one In should be Low and the other High so the motor can rotate in one or the other direction). PWM(Enable pin of the L298n pin 6) I have conected to DIO3.
PWM signal I cretaed is shown in picture.
My questions are:
1.Will loop timer I used, provide that period of signal is lenght I specify in the control(for example if I put 20 000 will the period be 20000 s)?
2. Can I vary the duty cycle changing the control Waiting (DIO3 is HIGH for a couple of us, then it sets LOW, and then all that repeats )?
3. Earlier I thaugt that PWM signal I should send in both IN1 and IN2, and that the Enable pin is used to stop or start the motor. I tried that and the motor was rotating different speed, and I could stop or star the motor with enable pin, sending it HIGH OR LOW, but I could not change the direction of the motor. So my other option was to conect the pins as I explained at the begining. My question is: Should I PWM conect to the enable pin, and will thah work?
Thank you

I found a couple of resources that deal with PWM on the FPGA and motor control - they might be helpful to reference as you look for answers to your questions.
Developing a PWM Interface using LabVIEW FPGA
http://www.ni.com/white-paper/3254/en/
CompactRIO Motor Control Basics Tutorial
http://www.ni.com/pdf/labview/us/compactrio_motor_control_basics.pdf
PWM Output With LabVIEW FPGA
http://www.ni.com/example/26499/en/

Labview fpga module Spartan 6 LX9 FPGA

Does Spartan 6 LX9 FPGA supported in labview FPGA module ?

varunme,
The only FPGA targets that can be programmed with LabVIEW FPGA are National Instruments FPGA products (cRIO, sbRIO, R-Series, FlexRIO, etc) and the Xilinx Spartan 3E XUP board. Unfortunately, LabVIEW FPGA doesn't support third party devices containing the LX9 FPGA.
-Nick-
Nick C | Staff LabVIEW Platform Product Support Engineer | National Instruments

Labview FPGA encoder reading

hello,
I an new in LabVIEW FPGA programing so I would appreciate any help. I am using sb-rio 9636 card and optocoupler for speed messaurment of DC motor. I have conected everyting right and the sensor is giving me date. But messauring the speed the oscilations of sensor data are huge. I am not changing the speed and motor continiousliy is rotating in the same speed but data are not the same. For example im 12 V that is the max speed motor schould rotate in 6500 rpm/min but in one second it is showing 6500 and in the other 5500 rpm/min. think that there is not problem in the code but that the messaurment are not reliable. I will put my code. I need to know is there anz other way to do encoder readings.
Thank you

I don't see anything in your loop that guarantees the timing of your sampling of the digital encoder pulses. It appears you expect that loop to run at 1MHz based on the uS unit label on your time of flight indicator.
Because you are using front panel indicators for some of your calculation variables, I can't see all the numbers going into your calculations.
How much variance do you see in the time of flight measurement on your front panel? You must remember that you are making measurements in whole integers of uS. How much change in the RPM calculation do you see if the uS measurement drifts by 1 uS?
If the impact of 1uS change in pulse to pulse measurement has a big impact on your calculation, then you will need to adjust your algorithm to get a more precise measure of the time of flight.
Some ideas:
The faster your sampling loop runs, the more likely you will sample the signal right after the pulse transistion. Consider using a Single-Cycle Timed Loop to sample at speeds in the 40MHz (25ns period) range. This will give you more precision. One risk I can't rule out in your existing code is that you may be sampling slow enough that in some cases you miss a pulse completely. If you want to ensure that you do not miss any pulse edged, then you must ensure that the loop is sampling at least 2x the frequency of your pulse train, assuming the pulses have a clean 50% duty cycle. If that duty cycle is not 50%, then the maximum sampling period must be shorter than the shortest pulse you expect.
Rather than measuring the time difference from pulse to pulse, measure the time of 10 pulses, or 1000 pulses, or some other larger number. This averages a larger number of pulses so that the difference of 1us resolution has less impact on the calculated measurement.

LabVIEW FPGA polynom

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