LabWindows + Epoc EMOTIV EEG

Hi,
I have a research edition EPOC (hardware and SDK). My intention is to acquire and save the signals from each electrode in real-time. www.emotiv.com provides c++ examples to do exactly that (with visual studio 2005). I tried to run the code with labWindows CVI 2009. First, I put all the .h and .dll in the project folder, and then set as include path all the headers of visual studio.
When I run the code (with no modifications) , I get several awkward errors such as:
crtdefs.h"(556,121) syntax error; found ')' expecting ';'.
I'd be very glad if someone helps me on this,
Constantino

Hi,
LabWindows provides a C compiler and no C++ compiler, so you will need to adapt the C++ examples in order to use LabWindows/CVI. Depending on the code this may be a snap or quite some effort. If you also have Measurement Studio this might be the simpler approach...
Good luck!

Similar Messages

How do I use ZLIB in LabWindows?

I downloaded the ZLIB 1.2.5 DLL from zlib.net and I am trying to use it with a C program for LabWindows 8.5. I copied the DLL into my windows\system32 folder and the .h/.lib files into my project. When I try to build my code, I get an error that sys/types.h was not found. (zconf.h is trying to include this file. It does not exist in my LabWindows installation.) From previous posts, I know that other users have been able to build ZLIB using LabWindows. How do I do it?
Rich Ferrara
Solved!
Go to Solution.

Rich:
types.h is commonly defined in unix systems. I'd suggest you start by commenting out line 364 in zconf.h and see what other errors you get.
Lines 363 through 365:
#ifdef STDC
# include <sys/types.h> /* for off_t */
#endif
The comment on line 364 says that types.h is included for off_t.
Here's a link from IBM that describes the contents of types.h
http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.files/doc/aixfiles/ty...
It describes off_t as follows.
off_t
File offset, measured in bytes from the beginning of a file or device. off_t is normally defined as a signed, 32-bit integer. In the programming environment which enables large files, off_t is defined to be a signed, 64-bit integer.
If you comment out line 364 and get errors regarding off_t, define it yourself, using the default int size on your system.
typedef int off_t;

Visual Studio or LabWindows/CVI?

I have a bit of a dilemma.
I currently own Visual Studio 2010, IMAQ Vision Development Module 2013, and Measurement Studio (not sure of version). I currently do all of my programming in VB.net. Because IMAQ VDM is stuck in .Net framework 3.5 and there will be no further .net development by NI, I need to plan for the future. My applications need run on Win 8, 9, 43, or whatever my company decides to migrate to from Win 7.
My understanding is that the NI modules I currently own will work with LabWindows/CVI. Correct? I also believe I can use them with C++ using the VS IDE. Is this also correct?
Within my applications I do a lot of interfacing with Excel, writing text files, and interfacing to non-NI devices (cameras, DAQs, scanners, etc). I am able to do these things pretty easily using VB.net using vendor-provided SDK's.
Therefore, my question is this...given the investment I have in software already, do I gain anything by migrating to LabWindows/CVI? What do I lose?
I should point out that regardless of the path I choose I will need to bone up on my programming skills in the corresponding language.
Thanks for all your help!

Hello Steverino!
Here are some advantages when using LabWindows/CVI over Visual Studio, which make the product more suitable for various industry-related applications:
You are correct, LabWindows/CVI integrates with the NI platform: NI hardware and software, like TestStand or LabVIEW (e.g. debugging source code from one software to another, seamlessly).
NI hardware and third-party hardware connectivity.
OpenMP support.
CVI integrates with intrument control.
CVI Run-Time benefits from User Protection.
Run-Time checking (e.g. for uninitialized variables).
Scientific User Interface Controls and GUI Editor.
Advanced debugging capabilities:
Remote debugging support from ADE.
Real-Time debugging support from ADE.
Memory leak detection using the LabWindows/CVI Resource Tracking Window.
Just-In-Time debugging.
Deployment: build custom installers and patches that you can ship as stand-alone easy-to-use installers.
LabWindows/CVI libraries: Advanced Analysis, Toolbox, Connectivity (Network Variables, Network Streams, DataSocket), etc.
Support for LabWindows/CVI Toolkits: SQL Toolkit, Vision, PID, RT.
Regards,
- Johannes.

Labwindows recompiles files when I switch from the development environment to another application

I am writing a labwindows driver, but having issues with the environment itself. I am able to compile the .c file for the driver, and my panels are working. I am having problems with labwindows recompiling the .c file even though nothing has changed. It is a random problem that I have seen before, but never managed to get around. The problem shows up in a variety of instances.
I.E. While in interactive execution, I can click on another application on the taskbar (internet explorer, email, etc.) and labwindows displays a message that the c file is being recompiled. Nothing in the file changed! Why does it try and recompile when it is simply losing focus? This is 'random'. Just when I think I have found a way to reliably reproduce the issue, it quits recompiling when I switch applications. I have tried playing with the build options, but haven't had any repeatable success. I even tried to enable the -o option, but is still recompiles the file. (maybe -o won't work on a driver since it won't build without a main?) I have even had issues with calling printf in a function during interactive execution. It recompiles the c file for no apparent reason right after the stdio window prints the message. At this point, the stdio window closes, and labwindows pops up the compiling message again. It kills my interactive session, and I have to redeclare all of my variables to continue checking out my driver.
I see the same issue randomly when I go back to the project from another application. (Click on labwindows in the taskbar, and it immediately compiles the c file.)
I have seen this in other projects, and it appears that the issue is limited to instrument drivers. When labwindows pops up the message that it is compiling files it is almost always a driver that is loaded as an instrument. I played with unloading the instrument but leaving the .fp in the project, but I don't think that worked. (It has been awhile since I tried to figure this out.) When working on a driver, it would be difficult to unload the .fp or not load the instrument anyway.
(I just clicked on labwindows in the taskbar to see if I left anything out. Labwindows popped up the message that it was compiling the c file. It appears that I can go back and forth between the labwindows icon in the taskbar and the cvi icon ~15-20 times and then labwindows will recompile the file. I even walked away from my computer for a couple of minutes, and it compiled when I came back and clicked on the labwindows icon.)
I am running labwindows 9.1 (but have seen this on 8 also)
The files are on a network drive.
(Could it be mcaffee or some network security stuff confusing labwindows?)

My pc is currently running Windows XP sp3.
I first saw this issue when I went from LabWindows 7.1? to 8.1? I am sure that I had the issue in 8.1
I was able to reproduce the issue in production on a pc running windows 2000. (Which is what I had at my desk previously, and had seen the issue.)
I asked another member of the test engineering group, and I am not the only one seeing the issue.
One of the earlier replies mentioned the auto save feature. When I went to production to see if I could reproduce the problem there, I opened CVI and explorer. I wanted to check the time-date stamp on the .c file that keeps recompiling. The time-date stamp was a day old, and did not change when the period of time for auto save was passed. (It probably would if I made changes but didn't save the file?) I was able to switch back and forth between the explorer window and cvi, and the file would recompile. I played with turning off the auto save, enabling the build status window, making the -o option compatible with cvi 5.0, displaying the build status column, etc. It appeared at one point that it had quit recompiling when switching between applications. I went back to my desk, and tried to match the settings, but never reached the same conclusion.
There is not anything special about the project I am working on. It is a labwindows driver for a pxi module. There are only three files in the project, the .c .h and .fp. The .c file keeps getting recompiled at seemingly random times. It is especially frustrating during interactive execution while testing my code/function panels. If I switch to another application and back, I almost always have to start over because compiling the file closes the interactive execution. I have to redeclare all of the variables, and re-run any of the setup panels that are required. (I have to open the DRM, load the module fpga/dac, and then I can run the panel I am actually trying to test.) I have similar problems when trying to troubleshoot with printf statements, as it seems to recompile when focus switches to the stdio window. I have resorted to a test project, where I can add the function calls and skip having to do any work via interactive execution.
I haven't been able to find anyone outside of where I work reporting the same issue. Maybe it has something to do with IT/viruscan/etc. It is definately a strange issue.
(I have switched back to CVI several times while writing this, and the .c filed recompiled about 20% of the time. At one point, I had left the build options dialog open when switching back and forth. I did not change any options, but the .c file recompiled when I closed the options window?)
Occasionally, when I see what appears to be the recompile message flash up, my interactive execution does not halt. I.E. I don't have to redeclare my variables. It is sometimes hard to see what the message says, you just see a dialog box pop up and disapear really quickly.

Software Development Engineer positions at Hysitron, Inc. in Minneapolis (LabWindows CVI exp preferred)

Software Development Engineer
Hysitron, Inc. is a premier scientific instrument manufacturer. Founded in 1992 with headquarters located in Eden Prairie, MN we are committed to promoting nanotechnology by developing advanced transducer and control technology. This leadership has made Hysitron the world leader in nanomechanical test instruments. The TriboIndenter®, TriboScope®, Ubi, and other Hysitron innovations have opened new horizons for scientists interested in investigating and understanding mechanical properties of materials at nano-scale. Hysitron fosters an environment and culture where innovation flourishes, teamwork is encouraged, and superior performance is rewarded.
Hysitron invites applications for multiple software development engineer positions from those aspiring to explore and succeed in the nano world. Hysitron, Inc. is an Equal Opportunity Employer M/F/D/V
Job responsibilities
The software development engineers would be responsible for developing test and measurement software applications for nano-mechanical testing instrumentation. Job deliverables would include:
-          Develop software applications in C based Labwindows CVI for Hysitron Instrumentation
-          Support the development of applications to address challenges in instrument automation and control
-          Test software applications using debugging and simulation tools
-          Perform software releases and software quality assurance activities
-          Participate in the design of new software products
-          Perform maintenance activities for existing products
-          Adapt and deliver on quality software development practices
Minimum qualifications
-          BS in Computer Science/ Computer Engineering/ Equivalent Scientific or engineering discipline
-          Min of 3 yrs experience in Instrumentation software development in an industrial or R&D environment
-          Expert at programming language C, knowledge of C++
-          Working knowledge of various communication protocols, e.g. USB, RS232, IEEE, RS485, TCP/IP, Modbus
-          Knowledge of general software design/documentation processes in test and measurement systems
-          Proficient problem solving skills
-          Strong analytical and technical skills
-          Excellent communication and interpersonal skills
Preferred Qualifications
-          Proficient with LabWindows CVI and XML
-          Working experience with DSP(Code Composer Studio) and/or FPGA level programming
-          Exposure to digital electronics and instrumentation
-          Working experience in Robotics interface programming
-          Experience with Controls/Automation engineering
Application and Information
Qualified candidates should send a letter of application and their resumes to (please include ‘SW Engineer’ in subject line):
Hysitron, Inc.
10025 Valley View Rd
Eden Prairie, MN 55344 USA
Phone: (952) 835-6366
Fax: (952) 835-6166
E-MAIL: [email protected]
Web: www.hysitron.com

This position is still accepting resumes/CVs.

How do I send e-mail to a distribution list using LabWindows/CVI?

I need to be able to send e-mail to a user-defined distribution list using LabWindows/CVI? Has anyone done this? Any ideas where I could look?

I commented on something similar to this awhile back. My issue was that I had the base version and didn't have the Internet classes. So this external app worked like a charm
It has a lot of command-line inputer options to use as well.
http://forums.ni.com/t5/LabWindows-CVI/Need-Help-for-Sending-Email-with-LabWindows-8-5-or-9/m-p/1095...

How to use a multiple boards (6321/6323) analogical acquisition task with simultaneous analogical generation task using the same boards (Labwindows CVI10)

Subject : it seems impossible to run a multiple boards analogical acquisition task with one or several analogical generation task using the same boards.
NI Configuration : Dev1 = Dev2 = 6321 boards
Development environnement : LabWindows CVI 10
Source code for analogical acquisitino task :
       DAQmxCreateTask("",&AIRecordingtaskHandle);
       DAQmxCreateAIVoltageChan(AIRecordingtaskHandle,chan,"",DAQmx_Val_NRSE,min,max,DAQmx_Val_Volts,NULL);
       DAQmxCfgSampClkTiming (AIRecordingtaskHandle, "", rate, DAQmx_Val_Rising, DAQmx_Val_FiniteSamps, sampsPerChan);
       DAQmxGetTaskAttribute(AIRecordingtaskHandle,DAQmx_Task_NumChans,&gNumChannels);
Chan = "Dev1/ai0, Dev1/ai1, Dev1/ai2, Dev2/ai1"
Source code for analogical generation taskS :
       DAQmxErrChk (DAQmxCreateTask("",&AOtaskHandle_C1_DAC0));
       DAQmxErrChk (DAQmxCreateAOVoltageChan (AOtaskHandle_C1_DAC0, chan, "", min, max,DAQmx_Val_Volts, "")); // chan vaut Dev1/ao0
       DAQmxErrChk (DAQmxCreateTask("",&AOtaskHandle_C1_DAC1));
       DAQmxErrChk (DAQmxCreateAOVoltageChan (AOtaskHandle_C1_DAC1, chan, "", min, max,DAQmx_Val_Volts, "")); // chan vaut Dev1/ao1
       DAQmxErrChk (DAQmxCreateTask("",&AOtaskHandle_C2_DAC0));
       DAQmxErrChk (DAQmxCreateAOVoltageChan (AOtaskHandle_C2_DAC0, chan, "", min, max,DAQmx_Val_Volts, "")); // chan vaut Dev2/ao0
At the first DAQmxReadBinary call attempt, the system shows an error (see attached document)
What we understand about that error : it is impossible to run the two set of tasks (ai and ao) using ressources from both Dev1 and Dev2 in the set of tasks because it is not allowed to use the same Reference Clock for that.
The question is : is there a way to to that without having that kind of message?
We tried different combinations :
- Using only one ao task (on Dev1/Dac0) : same error
- Not using any ao task (only the ai task) : no error
- configuring the ai task with only channel from Dev1 : no error
- Using "/Dev1/ai/SampleClock" as internal clock for the ai task and "/Devk/ao/SampleClock" for each ao task (k standing for "1" or "2" depending of the ao task we consider) : error
Thanks a lot.
Pièces jointes :
MsgErreur NIDAQmx.JPG ‏38 KB

doublon
Valentin
Certified TestStand Architect
Certified LabVIEW Developer
National Instruments France
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How to use CAN256 and CAN257 in Labwindows CVI?

I am trying to learn about CAN programming in LabWindows CVI. None of the samples do anything other than generate cryptic error messages. I do not have a card or interface device yet, but reading in the help files I found this:
"NI-CAN provides a virtual CAN card with two interfaces, CAN256 and CAN257. The two virtual interfaces are connected by a virtual bus. When you write CAN frames to one virtual interface, those frames are received by the other virtual interface, and can be read as channels. This feature allows you to read and write CAN data in the same manner as two real CAN interfaces connected by a real CAN cable. The conversion does not require real NI CAN hardware, and your application is not required to check for specific CAN IDs."
I modified the Waveform ouput project and add CAN256 to the dropdown in the uir file. However when I run it, I get the same error message as always, error -1074388725.
Is there an example CVI code someplace to demonstrate the use of these virtual channels?

Thanks Drew.
Ultimately, my customer provided me with a WriteCAN256.vi and ReadCAN257.vi that were perfect for my needs. The WriteCAN256.vi along with my NI USB 8473s allowed me to provide data collection on multiple CAN devices and to verify that my Software can handle all data types from CAN devices.
Note: My customer allowed me to share his .vi's. They are enclosed ...
Best Regards,
Don W
Attachments:
CanBus Read (Frames)_85.vi ‏55 KB
CanBus Write (Frames)_85.vi ‏48 KB

How to use the checksumdll.lib in LabWindow/CVI to create CRCChecksum();

Hi All,
Any one know how to use the checksumdll.lib in LabWindow/CVI to create CRCChecksum() ?
Thank you.

Do you ave some documentation about that dll?
Have you looked into dll properties searching for vendor name? Maybe you can look int vendorìs site and obtain some help.
Ultimately: are you forced to use that dll or can you use any software to calculate the checksum? There are several CRCs that you can use: provided you know which is the type used you could find an algorithm to calculate the CRC and check an existing one.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

How to set a DMA transfer type for PXIe-6536 in LabWindows/CVI?

I have a PXI chassis PXIe-1078 with a controller PXIe-8115 running under Windows 7. The digital output board is PXIe-6536.
I use a function DAQmxSetChanAttribute to set a property DAQmx_DO_DataXferMech to a value DAQmx_Val_DMA, since I want to use a direct memory access data transfer. This wokred well with a PCI-6534 board using the same LabWindows/CVI code before migrating it to the PXIe system.
Unfortunately, running this code on the PXIe system reports a DAQmx error -200452: "Specified property is not supported by the device or is not applicable to the task".
The task is created in the following simple way (the board name in MAX is 'Dev1'):
   DAQmxCreateTask ("digTask", &digitalTask);
   DAQmxCreateDOChan (digitalTask, "Dev1/port0:3", "DIG_CHANNELS", DAQmx_Val_ChanForAllLines);
   DAQmxSetChanAttribute (digitalTask, "", DAQmx_DO_DataXferMech, DAQmx_Val_DMA, 15);
How can I solve this problem? How is it possible to choose between different transfer types?
Thank you in advance for any hint!

Hi CavityQED,
The PCI-6534 is a "Digital I/O" board while the PXIe-6536 is a "High Speed Digital I/O" board, that's why they don't have the same properties.
By the way you can use DMA transfer with this method :
http://zone.ni.com/reference/en-XX/help/370520J-01/hsdio/direct_dma/
Let me know if it helps you.
Regards.
Mathieu_T
Certified LabVIEW Developer
Certified TestStand Developer
National Instruments France
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How do I increase the number of opened files in LabWindows?

There's a Win32 function _setmaxstdio, but it doesn't seem to be included in the stdio.h version in LabWindows. I'm using the fopen call and it's limited to 512 opened files. MSDN help says to use the _setmaxstdio function. Is there anyway to do this with the LabWindows compiler?
Thanks!

This number is defined in stdio.h as FOPEN_MAX and it is set to 255. Are you using fopen to open your files? _setmaxstdio is not supported for CVI. Why do you need to have more than 512 files open at one time?
I am going to go ahead and say that this is not recommended. This can put a heavy strain on your system and can also suffocate your OS of file descriptors (remember that other applications and your OS itself will be opening files as well). Likely there is another way to architect your application so that you do not need that many files open at one time. Typically you do not leave files open. You open, read/write, then close.
National Instruments
Product Support Engineer

How can I convert a project from LabWindows/CVI 2010 to a Visual Studio 2011 project?

I have a good sized project, 12 source files, 14 headers, 1 uir, that I want to be able to edit and compile in MS Visual Studio 2011, MSVC++.
I remember being told that LabWindows dropped support for C++ in 2008 and no longer had a wizard for converting projects. I know I can go the DLL route, but I have never created a DLL before and wouldn't know where to begin with it. What would be the best way to go about this conversion?
Solved!
Go to Solution.

CVI 2010 still supports the Visual Studio Conversion Wizard for Visual Studio 2005/2008. We do plan to add support for VS 2010 in a future release.
If you need a VS 2010 project now, you can use the Visual Studio 2008 conversion wizard, then upgrade the VS 2008 project to VS 2010.
National Instruments
Product Support Engineer

How to get bar graph in word in labwindow/CVI ?

how to get bar graph in word in labwindow/CVI ?

ashwinic9,
spawning your question over more and more threads (the present one, this one and this other one) won't give you a faster answer; instead, it will irritate forum users!
Especially if you have at your disposal a fast way to perform a test. I pointed you some days ago to word report example, that writes a table to a word document: did you tried changing the graph into a bar graph and generating the report? I have done it for you and the result is OK, as you can see in the attached document.
Now, since the example works well, there must be something in your particular situation that prevents the graph to be shown; that is: you must add some more data on your actual problem and maybe a small example that exposes the problem.
But please: keep active only this discussion and let the other threads die!
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?
Attachments:
wordreport.doc ‏38 KB

I would like to know how to transform an API C++ application in MFC C++ application to use the measurement studio components or Labwindows CVI

I don t know the way used to transform a C++ with API program in an MFC application using measurement studio or Labwindows CVI.
Thank you for you help.

You can use the Measurement Studio Add/Remove Components Wizard to add Measurement Studio components to your C++ application. For more information, see the "Adding and Removing Components from Measurement Studio Projects Using a Wizard" topic in the Measurement Studio reference. You can find it in the table of contents under:
Visual C++ Help
Tutorials
Measurement Studio for Visual C++ 6.0
If you're using the Measurement Studio update for Visual C++ .NET, this topic will be under:
Visual C++ Help
Tutorials
Measurement Studio for Visual C++ .NET
- Elton

I used to working with Labwindow CVI and i would like to know how can i use the commands "loadpanel" and "Displaypanel " in Labview. Using Invoke Nodes?

I want to make another panel appears and runs, but i don´t want to use a subpanel. So, i would like to use somenthing similar to Loadpanel and Displaypanel, that you can use in Labwindows CVI, but in Labview, is ti possible?I hope your answers, thank you!!!

Hi Bichillo,
I posted an example here.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=137&HOID=50650000000500000014570100&HTHREAD=000087828&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
It demonstrates how to do what you are asking.
I do not mind you laughing at the code.
Have fun!
Ben

LabWindows + Epoc EMOTIV EEG

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