Labview code into freescale controller

Hi all,
Is there any way to program a freescale controller from labview as we do from the freescale code-warrior or any other IDEs?
Thanks,
Yogesh

Hi,
Yes there is definitely a way to program Freescale Microcontrollers using LabVIEW for Embedded. The same has been discussed in this forum as well. You can also check out more about the kit over here.
Hope it helps!
Shreyas Hebbare
Shreyas Technologies
India

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How to output data when converting labview vi into matlab mex functions

Hi,
I am a fairly new user to labview and am currently working on labview
7.1. I have created a labview vi which can extract data from ni daq
6070e in real time. The problem is that this code has to be converted
so that it can be used with matlab.in order to do that i am using math
interactive tool kit which converts the labview code into mex files
which can then be used in matlab. Unfortunately i have not been able to
figure out how to output this data so that it can be processed in
matlab easily. i cannot afford any loss of information and all the
output must happen in real time. the o/p must take place after the fft
has been done. i am attaching the vi for convenience.There are 10
broken wires ,and this is the place where i want the o/p to be
generated.
Also do let me know if this vi can be further improved.
Regards
Attachments:
RT_loop2ver4_working.zip ‏642 KB

Manuj,
You seem to have misunderstood the way in which LabVIEW processes data. The code that you have produced will run in exactly the same way without the need for the case structure.
The code does not actually run the data from the previous case. It is merely processing data from the previous loop iteration, regardless of the case. If you were to remove the case structure, leaving only one copy of the code intact, and remove the toggle switch you have produced, or used the shift register which, I assure you would have worked, then you will have exactly the same functionality.
I have attached an example that uses the shift register to toggle cases, but also iterates that the case structure is not needed by using the same feedback node (and code) without a toggle switch or case structure.
Hope this helps you optimize your code
Regards
AdamB
Applications Engineer
National Instruments UK
Applications Engineering Team Leader | National Instruments | UK & Ireland
Attachments:
CASE_NO-CASE_Example.vi ‏24 KB

Tutorial on integrating C/C++ code into LabVIEW (6.0 through 7.0)?

Where can I get a tutorial that will show me how to integrate C or C++ code into LabVIEW?

I would also check the Using External Code in LabVIEW manual, found here
Bilal Durrani
NI
Bilal Durrani
NI

NI Motion Assistant LabVIEW Code Generation Error

Hello, the following is my current setup:
NI PCI-7334 motion control board
NI UMI 7774 splitter board
3 x NI P70530 Drives
3 x NI CTP12ELF10MAA00 Stepper Motors
3 x Power supply units for drives
LabVIEW 2010
NI Motion Assistant 2.6
Motion and Automation Explorer 4.7
I have built a three axis motion system that I am trying to configure with labview. After verifying that everything was set up correctly, I opened MAX, updated the firmware to my motion control board, and intitialized the controller. Since then, I have created many basic programs using the Motion Assistant Software to test the movement of my device. Everything works fine while using the Motion Assistant software (I have three axis movement, multidirectional control, and can perform various straight line and arc moves). My problems begin when I try to use the code generation feature.
When trying to use the code generation feature to output a labview diagram, I run into a problem where a dialog box pops up and says "Find the vi named ...."
Some examples of the names that come up are: Configure Vector Space.flx, Vector Space To Control.flx, Motion Error Handler.flx.
To be clear the program in Motion Assistant that I am trying to export to LabVIEW code is composed of two individual steps. One that tells X,Y, and Z motors to move forward 25 revolutions, and one step that tells them to move backwards 25 revolutions.
I have made many other programs in Motion Assistant that run fine, but I always receive similar errors when trying to use the code generation feature to export to LabVIEW. Is there something that I can do to solve my problem?
Thank you for your help.

Hi Joe,
I am using Ni-Motion Assistant 2.6, Ni-Motion 8.1, and Motion and Automated Explorer version 4.7.
The code I posted is supposed to tell Axis 1 to move 40 revolutions at 400 rpm. It works fine in Ni-Motion Assistant but when I try to generate a LabVIEW diagram I receive the following error, "Find the VI named 'Motion Error Handler.flx'". I have had it search my directory, as well as the disk that I installed both LabVIEW and Ni-Motion but no luck. Thanks for your help.
Attachments:
1111.vi ‏9 KB
1 axis movement.zip ‏8 KB

How can i convert .gif/.bmp/.jpeg file to labview code(vi)?

Hi,
I am having a .gif file which consists of vi code. I want to convert that .gif file into vi & complile it. I am using LV 6.1 & 7 express. Is is possible?
Reverse is surely possible like we can convert the vi diagram into .gif/.bmp file? But above i dont know?
Your help will really appreciated.
Best Regards,
Nirmal

If I understand your desire, it's to be able to convert a graphical image (bit map or screen photo, for example) into a functional block of LabView code, with all of the wire work done, etc. This is a task approximately equivalent to performing optical character recognition.
In the case of a non-system subvi, unless that subvi is loaded, so that it's graphical representation can be recognized by comparing the bit-map image for the subvi on the photo with the available vi's.
Another difficult problem to solve is when the bit-map has been scaled up or down, such that there's a pixel count mismatch between the VI iconic bitmap and the photographic bitmap you wish to import into your code diagram.
And if you try to do recognition on objects that have h
ad their RGB color representations changed, as can happen when JPG compression or other compression forms are used that reduce to total number of colors saved, that challenges the object recognition further.
Also, what you're interested in having is only of value to Labview programmers, so there's not a very large market for such a tool to be sold to - unlike bitmaps of scanned text to ASCII or wordprocessor applications - traditional OCR software.
All this ins't to say it can't be done, but that it's difficult, and for the person or company that undertakes it, the sales potential is limited.
Regards,
Bob Donnell

How to restructure this code into separate classes?

I have C# code that initializes a force feedback joystick and plays an effect file(vibrates the joystick). I have turn the console application into library
code to make a dll so that I can use it in LabVIEW.
Right now all the code is written under one class, so went I put the dll in LabVIEW I can only select that one class. labVIEW guy told me that I need to
restructure my C# code into separate classes. Each class that I want to access from LabVIEW needs to marked as public. Then I can instantiate that class in LabVIEW using a constructor, and call methods and set properties of that class using invoke nodes and
property nodes.
How can I do this correctly? I tried changing some of them into classes but doesn't work. Can you guys take a look at the code to see if it is even possible
to break the code into separate classes? Also, if it is possible can you guide me, suggest some reading/video, etc.
Thank you
using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using Microsoft.DirectX.DirectInput;
namespace JoystickProject
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
private System.Windows.Forms.Label label1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private Device device = null;
private bool running = true;
private ArrayList effectList = new ArrayList();
private string joyState = "";
public bool InitializeInput()
// Create our joystick device
foreach(DeviceInstance di in Manager.GetDevices(DeviceClass.GameControl,
EnumDevicesFlags.AttachedOnly | EnumDevicesFlags.ForceFeeback))
// Pick the first attached joystick we see
device = new Device(di.InstanceGuid);
break;
if (device == null) // We couldn't find a joystick
return false;
device.SetDataFormat(DeviceDataFormat.Joystick);
device.SetCooperativeLevel(this, CooperativeLevelFlags.Exclusive | CooperativeLevelFlags.Background);
device.Properties.AxisModeAbsolute = true;
device.Properties.AutoCenter = false;
device.Acquire();
// Enumerate any axes
foreach(DeviceObjectInstance doi in device.Objects)
if ((doi.ObjectId & (int)DeviceObjectTypeFlags.Axis) != 0)
// We found an axis, set the range to a max of 10,000
device.Properties.SetRange(ParameterHow.ById,
doi.ObjectId, new InputRange(-5000, 5000));
// Load our feedback file
EffectList effects = null;
effects = device.GetEffects(@"C:\MyEffectFile.ffe",
FileEffectsFlags.ModifyIfNeeded);
foreach(FileEffect fe in effects)
EffectObject myEffect = new EffectObject(fe.EffectGuid, fe.EffectStruct,
device);
myEffect.Download();
effectList.Add(myEffect);
while(running)
UpdateInputState();
Application.DoEvents();
return true;
public void PlayEffects()
// See if our effects are playing.
foreach(EffectObject myEffect in effectList)
//if (button0pressed == true)
//MessageBox.Show("Button Pressed.");
// myEffect.Start(1, EffectStartFlags.NoDownload);
if (!myEffect.EffectStatus.Playing)
// If not, play them
myEffect.Start(1, EffectStartFlags.NoDownload);
//button0pressed = true;
protected override void OnClosed(EventArgs e)
running = false;
private void UpdateInputState()
PlayEffects();
// Check the joystick state
JoystickState state = device.CurrentJoystickState;
device.Poll();
joyState = "Using JoystickState: \r\n";
joyState += device.Properties.ProductName;
joyState += "\n";
joyState += device.ForceFeedbackState;
joyState += "\n";
joyState += state.ToString();
byte[] buttons = state.GetButtons();
for(int i = 0; i < buttons.Length; i++)
joyState += string.Format("Button {0} {1}\r\n", i, buttons[i] != 0 ? "Pressed" : "Not Pressed");
label1.Text = joyState;
//if(buttons[0] != 0)
//button0pressed = true;
public Form1()
// Required for Windows Form Designer support
InitializeComponent();
// TODO: Add any constructor code after InitializeComponent call
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
if( disposing )
if (components != null)
components.Dispose();
base.Dispose( disposing );
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
public void InitializeComponent()
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
// label1
this.label1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label1.Location = new System.Drawing.Point(8, 8);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(272, 488);
this.label1.TabIndex = 0;
// Form1
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.BackColor = System.Drawing.SystemColors.ControlText;
this.ClientSize = new System.Drawing.Size(288, 502);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1});
this.Name = "Form1";
this.Text = "Joystick Stuff";
this.ResumeLayout(false);
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
using (Form1 frm = new Form1())
frm.Show();
if (!frm.InitializeInput())
MessageBox.Show("Couldn't find a joystick.");

Imho he means the following.
Your class has performs two tasks:
Controlling the joystick.
Managing the joystick with a form.
So I would recommend, that you separate the WinForm from the joystick code. E.g.
namespace JoystickCtlLib
public class JoystickControl
private Device device = null;
private bool running = true;
private ArrayList effectList = new ArrayList();
private string joyState = "";
public string State { get { return this.joyState; } }
public bool InitializeInput() { return true; }
public void PlayEffects() { }
private void UpdateInputState() { }
So that your joystick class does not reference or uses any winform or button.
btw, there is a thing which is more important than that: Your polling the device in the main thread of your application. This will block your main application. Imho this should be a job for a thread like background worker.

GPIB: I am having some problem in running Labview code properly.

Hello,
I have written a labview code to drvie my stepper motor (using GPIB function). This code is supposed to move
the stepper motors and keep updating the current position of motors. I am having an unique problem. This code runs fine for trial no.1st, 3rd, 5th and so on. While it fails to update for trial no 2nd , 4th, 6th and so on.
The main code is "motion_update_Final_Newport.vi". It will work for labview 7 as well as 7.1.
You may not be able to run this code. However, you may be able to understand my error easily as I have figured out where is the error. The update is based on a function, which returns (string) 0 for motion not done and 1 for motion done. This value is diaplayed in "output 1" and works fine. However, "check 2" which is an indicator does not work for trial no 2nd , 4th, 6th and so on.
If you go where I have "output 1", there is a while loop and "check 2" is an indicator for check. It remains on for trial no 2nd , 4th, 6th and so on.
I am attaching the code and this is for ESP 300 motion controller Newport co. I am certain that some of you would be able to figure out the error without running the code.
Thanx in advance,
DushyantMessage Edited by Dushyant on 04-18-2005 04:43 PM
Attachments:
modified_Motion_Update_Final_7.zip ‏228 KB

Thanks a lot for trying to help me.
I am sure that I am not moving any subvi.
Steps that I am trying to accomplish:
(i) I am moving the stepper motors for a relative distance.
(ii) Then I am trying to get the motor position after delay (ms) [defined in front panel].
Now, how I am trying to accomplish:
First outer stacked sequence:
seq 0 of outer: This sets GPIB as controller in command (without this I was having trouble when I was combining this with photodiode code). Please avoid this seq.
seq 1 of outer: The motor moves to certain relative distance. (I do not think that there is anything wrong here).
seq 2 of sequence: This part does updates the motor coordinate after delay (ms). Inside this, there is a case structure to choose whether I want the update.
If I want the update, then following steps take place inside the case structure:
Inner stacked sequence:
seq 0 of inner: [This is where I think that error is taking place] Inside this, There is a while loop which terminates when the "Motion Done?"
function returns "1", else "0". Inside the flat sequence structure, first sequence "updates" the motor coordinate while second check
whether the motion is done .
Seq 1 of inner: Controller wait till motor stops.
seq 2 of inner: The motor coordnate is updated for the last time.
seq 3 of outer: It clears the GPIB.Message Edited by Dushyant on 04-19-2005 10:22 PM
Attachments:
Wait_Till_Motor_Stops.vi ‏13 KB

Is there a tool to clean a directory structure of unused LabVIEW code?

I could write this from scratch as follows:
Load all of my LabVIEW code including dynamically-called VIs into memory, then list all these VIs.
List all VIs in the directory structure I want to clean.
For each VI in the directory structure that's not in memory, delete it. If this leaves that VI's parent directory empty, delete that parent directory.
There is probably already a tool or VI that does this, but I can't find it. Does such a thing exist?

bmihura,
I to have had the need/desire to do this. At my previous employer I wrote a tool that assisted with that function. Unfortunately I no longer have access to that tool. If you have a very big program you may have memory and speed related issues when you load "all the VI's into memory".
Good Luck
WW
Wire Warrior
Behold the power of LabVIEW as my army of Roomba minions streaks across the floor!

Putting code into CIN makes errors

Hi,
I am sorry to ask so many questions, but I am having a terrible time with
this. My code compiles perfectly when I compile it by itself. However, as
soon as I paste it into the space in the CIN provided c code, I get 11 errors.
Why is this? I would appreciate any info I can get. Thanks for your time
JMH

"JMH" wrote:
>>Hi,>>I am sorry to ask so many questions, but I am having a terrible time
with>this. My code compiles perfectly when I compile it by itself. However,
as>soon as I paste it into the space in the CIN provided c code, I get 11
errors.>Why is this? I would appreciate any info I can get. Thanks for your
time>>JMH
If you can compile your C code into a dll, then I recommend that you use
a Call Library Function (CLF) instead of a CIN. The amount of steps that
you need to follow to make a CIN work can become frustrating. With a CLF,
you need only make a function prototype, and you're done! The main advantage
that a CIN gives is that you have the ability to resize the dataspace a variable
has inside the code. For example, if you pass an a
rray of 100 DBLs out of
LabVIEW (into your C code)and try to pass 150 DBLs back into LabVIEW (from
your C code)then bad things will happen. There exists CIN tools that allow
you to resize the dataspace, so that LabVIEW will allocate a larger buffer
for the return data, and no errors will occur. If you are not resize dataspaces,
then don't worry. If you are, then just include the labview.lib library
in the LabVIEW/cintools/win32 directory.
For more information on calling dlls, look at this article: http://ni.com/support/labview/program/callcode/callmain.htm
Cheers!
Joel Andersen

FEATURE REQUEST: Lasso Tool to help organize code into separate VI's

Sometimes VI's can end up growing out of hand, and it is not so easy to re-organize sections of a VI into a separate VI.
It would be fantastic if there was a tool we could use to select a portion of our code inside of a VI (see Lasso tool in Photoshop or Free From Select in MSPaint), and have LabVIEW automatically move that code into a new VI with automatic assignment of inputs and outputs. All that code can then be replaced by a single VI.
This would make code organization so much faster and easier.
What do you think?

For the most part, it's already in LabVIEW. If you select code in your VI and go to Edit->Create SubVI, LabVIEW will take the slected code and create a subVI and automatically replace the selected code with the subVI.
The only thing it doesn't have is the lasso selection. You have rectangular selection and can keep addeding to the selecting using the SHIFT key.
You should post ideas to the Idea Exchange, too BTW.

Labview code to trigger and scan spectra from HR4000 spectrometer?

has anyone used labview code to trigger and scan spectra from HR4000 spectrometer? When I use one of the device drivers (Spectral Acquisition.vi), i miss lots of trigger when I run it for more than 100 iterations?
I was wandering if anyone is working with it or had in the past and if you could share your insight.
Thanks

Inconsistent times are one thing, overall slowing down is another, although they may have common source. I guess it is the XY plot in your case. Do you have it AutoScaled? If so, try turning autoscaling of both axes off.
Secondly, I don't quite understand the reason for the inner loop with number of iterations = constant 1. What happens if you remove the loop? I understand you want to change the number of iterations in future, but let's test the simplest things first. Removal will require indexing the Wavelength array explicitly with an apropriate block. By the way, it is customary that you EITHER define the number of iterations of a FOR loop by connecting the N input OR by indexing of an input array - NEVER both at the same time. Maybe, changing the multiple XY plot into a single XY plot won't be necessary, maybe it will, try for yourself.
Thirdly, I suggest you try enclosing the XY plot block alone in a case structure (say, in its TRUE window) and set the true condition to occur at some fraction of the total iterations, not every cycle. You do this using the index "i" of the main iteration loop, calculate modulo something (e.g. 10) and test if it is true or false. This way you update the XY plot every 10th iteration only and by choosing different modulo divider you can test, if the plot's display is or isn't the beast slowing things down.
Finally, I suspect it is not necessary to use a Local Variable of the seconds 2 indicator. How about simply wiring the output of your To-double block to the input of the subtraction block? That should let you remove seconds 2 local variable with no harm done.
Daniel

Trying to use my computer LabView code to control 4 LED's

Hello,
I'm a student working on a project at CU Boulder and I need a little bit of help. I'm kind of new to LabView but, I created a code that will create a random number, which turns on one of four LED's, and then, that LED will turn off after a slide bar (accelerometer) senses a value greater than 5 (this value will change after some accelerometer data). After this process, the random number generator will generate a new number for a new light. I'm just wondering how to tell the computer which LED icon indicates which real-life LED. Is there a way to hook up my LED's without changing my LabView code? Do I need to create a digital output DAQ assistant? Please see the attached labview code and hopefully you can help me out. We've had major problems trying to get our accelerometer to read a constant logical value and have just run into our LED problem.
Thanks, Zack
Solved!
Go to Solution.
Attachments:
Making Lights Work.vi ‏22 KB

Hi Zack,
your VI is kind of Rube-Goldberg award nominee...
"how to tell the computer which LED icon indicates which real-life LED."
Well, you have to decide where to "hook" those "real-life" LEDs. When you have made your decision you'll need some hardware driver to switch the LEDs. A DAQ assistent may be a good choice when you use NI hardware. Otherwise use the driver coming with your hardware...
"Is there a way to hook up my LED's without changing my LabView code?"
No. "Real-life" LEDs need real hardware drivers...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
Making Lights Work.vi ‏12 KB

Capturing oracle error codes into a variable

Hi
Can someone show me how it is possible to save an Oracle defined error code into a variable? What I am trying to do is when a stored procedure fails an Oracle error is raised, such as ORA-xxxx, then pass this code into variable to be saved into a log.
How do I achieve this?

user633278 wrote:
How do I achieve this?Function SQLCODE in PL/SQL exception handler returns error code. SQLERRM returns message:
SQL> declare
2      x number;
3 begin
4      x := 1/0;
5    exception
6      when others
7        then
8          dbms_output.put_line('Error code: ' || SQLCODE);
9          dbms_output.put_line('Error message: ' || SQLERRM);
10 end;
11 /
Error code: -1476
Error message: ORA-01476: divisor is equal to zero
PL/SQL procedure successfully completed.
SQL> SY.

How to integrate RFSG driver with sampling theorem labview code

hi all,
I got the labview code of sampling theorem from labview-> find examples. How can I integrate this code with PXI system? How can I integrate the RFSG driver with labview code?

Hi Nieman,
LabVIEW 2014 should be compatible with the 9068 and the cRIO 2.1 drivers. I verified it should work as expected earlier today. Please make sure you are using the example cRIO PN-IO Device when you are moving the module over to the new target. If you are already accessing that, please navigate to this folder:
<Program Files>\National Instruments\LabVIEW 2014\Targets\NI\FPGA\cRIO\other
Please let me know if you see a CS_cRIO-PNAD folder. This folder provides all the files necessary to discover and use the module in the project. If we do not have that folder there, we will be unable to locate the module. If that is indeed the case, then it may be the driver did not install correctly.
If after finding this folder and it is still not working, please send me screenshots of the error that you are seeing and a MAX Technical Report. Thanks!
Matt S.
Industrial Communications Product Support Engineer
National Instruments

I am trying to have some LabVIEW code called in a New thread exit when the testStand sequence terminates

I have a Sequence that launches a sequence in a New Thread that happens to launch some LabVIEW code. The problem is when the LabVIEW code finishes, it will not close even when the TestStand sequence terminates. Is there a way to tell this LabVIEW code to Exit, I've tried the Quit LabVIEW function, but that causes a C++ RunTime Error. The LabVIEW code does end though, and it is set in the VI properties to:
Checked - Show Front Panel When Called
Checked - Close Afterwardds if originally closed
The sequence call that the LabVIEW code is launched from has the following options:
- New Thread
Unchecked - Automatically wait for the thread to complete at the end of the current sequence
Unchecked - Initially Suspended
Unchecked - Use single threaded apartment
Any clues on this would be appreciated.

Hi ADL,
Everything should close correctly if you check the checkbox "Automatically wait for the thread to complete at the end of the current sequence" in the thread settings.
With it unchecked, I am seeing the behavior you are.
Gavin Fox
Systems Software
National Instruments

Labview code into freescale controller

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