Efficient IT infrastructure management is about predictive and pre-emptive management, not knee-jerk, panicked reaction, too-late troubleshooting or problem-resolution after an event. Our proactive Insight Monitoring Service oversees a wide range of technology that is performed at varying service levels. The result is improved, more consistent service, greater quality, stability, reduced cost, and the ability to respond quickly to changes.
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network monitoring solution
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Use DAQmxCreateAOVoltageChan() to create multiple output channels in VS2017
Hi, all:
I want to use c++ to control NI-USB-9263.
First, when I create a single output channel as:
DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandle,"cDAQ1Mod1/ao0","",0.0000,5.0000,DAQmx_Val_Volts,NULL));
There is no problem.
But when I want to create two output channels as:
for(;i<4000;i++)
data[i] = 5.0*(double)i/4000.0;
DAQmxErrChk (DAQmxCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandle,"cDAQ1Mod1/ao0","",0.0000,5.0000,DAQmx_Val_Volts,NULL));
DAQmxErrChk(DAQmxCreateAOVoltageChan(taskHandle, "cDAQ1Mod1/ao1", "", 0.0000, 5.0000, DAQmx_Val_Volts, NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle,"",4000.0,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,4000));
DAQmxErrChk (DAQmxWriteAnalogF64(taskHandle,4000,0,10.0,DAQmx_Val_GroupByChannel,data,&written,NULL));
......
an error occurs: attemped writing data that is too large or too small.
error code: -200561.
I am sure the voltage range is not beyond the limitation.
Could someone help to solve this question? Thank you so much.
Regards
Xiaoran
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PXIe-1085 C code documentation
What C API do I use that can tell me how to get the serial from the PXIe-1085, and later send or retrieve data to any cards inserted?
Where can I find the C API for System Configuration API 17 functionality as well?
The readme for the PXI Platform Services 17.0 says to visit ni.com/info and enter the Info Code pximxisysmon." for more information about System Monitor features. This code does not exist.
Also, NI-DAQmx is the only API mentioned in the PXIe-1085 manual found here, is it only used for dynamic routing? Thanks.
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Trigger Multiple C Series 9234 at same rate
Hello all,
I am very new to NI development. I have a task in which I have 3 NI 9234 modules that I would like to trigger at the same time and collect a certain amount of data . I am hoping to do this in C/C++ using the DAQmx libraries, but having trouble finding a good example in the various other programs.
My first task would be to collect a finite set of samples at the same time using the 3 modules (aka, Dev1/a0, Dev2/a0, Dev3/a0).
My second task would be to trigger the collect with an external pulse (similar to the pulse generation example project).
Please let me know if this is possible.
I will continue to look into this, but have difficulty getting the task to run properly.
Thank you,
Kevin
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Support for legacy software migration
Hi,
We have a legacy software application currently running in Windows 2003 server (x86) which we are planning to move it to Windows 2012 server.
Our existing application uses the below mentioned MeasurementStudio components v6.0.3.597.
1. cwui.ocx
2. instrsup.dll
3. mesa.dll
Please let us know whether the same version of the MeasurementStudio components (32-bit) will be supported in Windows 2012 Server?
Regards,
Tamil Selvan.
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NI Daqmx 17 and FGEN 17 Isuues with Microsoft VS 2010 C++ Projects
Hi all
I am using MS VS 2010 along with NI DAQmx and NI FGEN for some time without any problem. However, when i updated older DAQmx and FGEN (Version 16 and before) with newer version 17, i got a strange problem in MS VS 2010.
The problem is whenever, i try to edit or write code (in c++ e.g.), it takes too much time to even write/edit a single line code. The cursor pointer halt and continues to blink for some time even for single change in code.
As i uninstall Version 7, the problem vanishes but as soon as i reinstall this version, same problem starts to occur. I have also tried to uninstall and reinstall MS VS 2010 many times but could not rectify this problem.
Note: As far as functionality is concerned, MS VS 2010 works fine with Version 17 (C APIs of DAQmx and FGEN are working fine), only problem is during writing/editing the code.
Kindly help me in this regard
Thanks
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Analog Pulse Trigger
All,
Given the code from the counter generate pulse, does anyone know how to trigger a voltage analog input collection using this pulse as the starting point? The two hardware modules for the counter and voltage input are on the same chassis. I want to queue the analog input and wait until the pulse is received. Then, generate the pulse when I choose, through say a button click, which will start the voltage collection at the same time. Needs to be through this pulse, as another device uses this pulse to start acquiring. Currently I start both tasks back to back in the code as such:
DAQmxErrChk(DAQmxStartTask(taskHandle2));
DAQmxErrChk(DAQmxStartTask(taskHandle1));
were task2 is my pulse and task1 is my AIvoltage, but this is off by a certain number of milliseconds.
Any advice would be appreciated. Thanks,
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Synchronizing PCI 6281 and USB-6281 vs. two PCI 6281 cards
Hi,
I would like to configure a measurement system using two DAQs.
One PCI 6281 card will get strain gauge signals from SCXI-1000 chassis.
The other DAQ card will be used for analog and digital I/O.
I have used an USB-6281 card for analog and digital I/O using buffered tasks.
I guess if would I set two devices in a C program, I may call functions using two device IDs.
What would be a better choice for synchronizing process using the two DAQs?
Will there be any differences?
Best regards,
Byeong-uk.
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Counter Output NI sample code not working..
Hi,
I tried to run a sample program given in the following directory,
\National Instruments\NI-DAQ\Examples\DAQmx ANSI C\Counter\Generate Pulse\Dig Pulse Train-Cont-Buff-Implicit,
which is a buffered pulse output program with pre-determined duty ratios.
However, an error says that the counter writing function cannot be started before the task is started.
I am using USB-6281 M-series DAQ. Is this sample program not suitable to my device?
How can I then use such pre-determined duty arrays or real-time duty updates?
I am really looking forward to hearing from you..
Thank you.
Byeong-uk, Im.
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ViSession contents
Hello,
Does anyone know what types of variables/functions/parameters are contained by a ViSession object?
Also, does a declaration ViSession m_InstrSession; initialize all of them properly?
I am trying to reproduce the single sweep example, in order to remotely control a ZNB8 model.
It's not working, returning me errors, as seen in the attached screenshot.
I am suspecting that it has to do with some of the variables in the m_InstrSession object, the rest seem pretty standard.
Any ideas?
Many thanks in advance.
Panos from Impedans
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Where can I download NI-IVI 1.61?
Hi, I was trying to install NI-Scope 2.0, but before I can install this software there is a prerequisite software that I need to install first, NI-IVI 1.61 or later.
Thank you.
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ANSI C deployment missing dlls
Good morning,
I wrote a command line app using ANSI C header and lib files ( NIDAQmx.h and NIDAQmx.lib ). I am trying to deplying it but when I try to run it I get crash due to some missing dll.
Running dependendy walker on the *.exe and searching a bit in the NI posts seems that I need the nicaiu.dll so I manually copied it from system32 to the binary level but I still get the crash when trying to run it. So I ran dependency walker again but this time on the nicaiu.dll and seems that the dll need the nispylog.dll that I don't have in my system.
I would have a help on this, I need to know which dlls do I need to deploy my ansi c command line applications and I also need those dlls please.
I compiled my app with VS2012 ( I don't use dot net, only ansi c ). The VS dependencies are there.
Thank you
Franco
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Migrating NI MS VS6 to latest [obsolescence management]
One of my clients wants to update his existing MXI system based on Windows 7 to Windows 10 with new computer hardware.
The system is PXI connected over Fiber with MXI PCI card on a 3rd gen Intel Xeon based server. The software is written in VC++ 6 with I guess measurement studio 6.
According to my knowledge and internet, Measurement Studio VC++ 6.0 is not supported by windows 7 but my client has its working on Windows 7. Their OEM somehow Configured it to work with Windows 7.
What I am supposed to do is:
- Update their computer to newer 8th gen based system
- Update Windows 7 to windows 10.
- Since source code is available, make it run on latest Measurement Studio
- Newer computers usually do not have PCI slots, can I use PCIe to PCI converter and mount MXI on it?
How much of it is possible?
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Compilation warning with MS13 dll in Visual Studio 2015
Hi,
We have an application built with Visual Studio 2015. This was migrated from Measurement Studio 2013 to Measurement Studio 2015 but used dlls were not updated to match MS2015.
We have following three dlls from MS13 and it all works fine.
Name ----------------------------- Version
NationalInstruments.Analysis.Enterprise.dll 13.0.45.242
NationalInstruments.Common.dll 13.0.40.188
NationalInstruments.NiLmClientDLL.dll 13.0.40.188
problem starts when I add following two MS13 dlls to my project
NationalInstruments.UI.dll 13.0.45.282
NationalInstruments.UI.Styles3D.dll 13.0.45.282
I start getting compilation error for version mistach with system installed MS15 Dlls
Severity Code Description Project File Line Suppression State
Error Exception occurred creating type 'NationalInstruments.Restricted.AnalysisLicenser, NationalInstruments.Analysis.Enterprise, Version=13.0.45.242, Culture=neutral, PublicKeyToken=4febd62461bf11a4' System.IO.FileNotFoundException: Could not load file or assembly 'NationalInstruments.Common, Version=17.5.40.49153, Culture=neutral, PublicKeyToken=dc6ad606294fc298' or one of its dependencies. The system cannot find the file specified. AxisParameters C:\GIT\PTest\AxisParameters\Properties\licenses.licx 1
and below is 'liecense.licx' file
NationalInstruments.Restricted.AnalysisLicenser, NationalInstruments.Analysis.Enterprise, Version=13.0.45.242, Culture=neutral, PublicKeyToken=4febd62461bf11a4
and below is entry in .csproj file
<Reference Include="NationalInstruments.Analysis.Enterprise, Version=13.0.45.242, Culture=neutral, PublicKeyToken=4febd62461bf11a4, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\Resources\NationalInstruments.Analysis.Enterprise.dll</HintPath>
</Reference>
<Reference Include="NationalInstruments.Common, Version=13.0.40.188, Culture=neutral, PublicKeyToken=4febd62461bf11a4, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\Resources\NationalInstruments.Common.dll</HintPath>
</Reference>
<Reference Include="NationalInstruments.NiLmClientDLL, Version=13.0.40.188, Culture=neutral, PublicKeyToken=4febd62461bf11a4, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\Resources\NationalInstruments.NiLmClientDLL.dll</HintPath>
</Reference>
How to avoid conflict between application's MS13 dll and system installed MS15 dlls?
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ReadDigital32 writing out of bounds of array and freezing computer?
Hello all, I am a graduate student will little programming experience trying to modify our lab's code to use a new detector which interfaces to the computer with a NI PCI-6534 card. The code is written in Borland C++ builder 6 and uses the ANSI C library support provided with the NIDAQmx drivers.
I have been able to get data, but have run into problems when trying to run experiments and retrieve many scans. After taking so many scans, the computer will freeze up completely, as in you must hold down the power button for a hard reset. How many scans before this occurs is tied to how many accumulations are requested, higher accumulations will freeze the computer in fewer measurements. It seems to be somehow related to the NIDAQmx ReadDigital32 function writing outside of the allocated bounds of the buffer array, as the computer only freezes when I include this step while executing the program, and purposefully making the buffer much larger, say 100x, only delays the freezing. I
This is the our code that reads the data, I only copied enough of the GetScanData() function to show where it puts the data from the GetRawData() function:
bool MultiChDetector::getRawData(uInt32 *dbuffer, int nRawScans) {
if (nRawScans>5000) {
last_error = "Bad number of accumulations" ;
return false;
}
MeasurementTask acq_task;
//One 32bit channel with 16 bit upper and lower words
DAQ_ERR( DAQmxCreateDIChan(acq_task.h(), DAQ_DEVICE"/port0_32", "Port32", DAQmx_Val_ChanForAllLines) );
DAQ_ERR( DAQmxCfgSampClkTiming(
acq_task.h(),
NULL, //internal clock
10e6, //10 MHz
DAQmx_Val_Rising,
DAQmx_Val_FiniteSamps, //DAQmx_Val_ContSamps
MCHD_CH_AMT*nRawScans) );
DAQ_ERR( DAQmxCfgBurstHandshakingTimingExportClock(
acq_task.h(),
DAQmx_Val_FiniteSamps, //DAQmx_Val_ContSamps
MCHD_CH_AMT*nRawScans,
10e6, //10 MHz
"/"DAQ_DEVICE"/PFI4",
DAQmx_Val_ActiveHigh, //the polarity for exported sample clock: active high or active low
DAQmx_Val_High, //whether the task pauses while the signal is high or low
DAQmx_Val_ActiveHigh) ); //the polarity for the Ready for Transfer event (System Ready)
double timeout_sec = 10.0 + nRawScans/1e3; //sec timeout, 1e3 = 1 kHz
bool interactive_wait = false;
if(interactive_wait) {
DAQ_ERR( DAQmxStartTask(acq_task.h()) ); // don't forget to Stop Task
int time0=GetTickCount();
unsigned long isDone=false;
do {
Application->ProcessMessages();
DAQ_ERR( DAQmxIsTaskDone(acq_task.h(), &isDone) );
if(isDone) {
break;
}
if( (GetTickCount()-time0)> int(1000*timeout_sec) ) {
Application->MessageBox("Error", "Multi-channel data not ready in time", MB_OK);
break;
}
}
while(!isDone);
}
int32 nRead = 0;
DAQ_ERR( DAQmxReadDigitalU32(
acq_task.h(),
MCHD_CH_AMT*nRawScans,
timeout_sec,
DAQmx_Val_GroupByChannel,
dbuffer,
MCHD_CH_AMT*nRawScans,
&nRead,
NULL) );
if (nRead != MCHD_CH_AMT*nRawScans) {
last_error = "Less amount of data was read";
return false;
}
if(interactive_wait) {
DAQ_ERR( DAQmxStopTask(acq_task.h()) );
}
/*thr_buffer = buffer;
thr_counter = nRawScans*MCHD_CH_AMT;
thr_request_scan = true;
while (thr_counter);
return true;
}
.................................
bool MultiChDetector::getScanDataS(float *destBuffer, ScanType scanType, bool subtractBackground, bool divideReference) {
bool requestOK;
bool* bad_points;
bad_points = new bool[MCHD_CH_AMT];
int het_extra_pts = 0;
if (scanType==SetPhase12){
het_extra_pts=3;
}
double *raw_data = (double *)calloc(MCHD_CH_AMT, sizeof(double));
double *norm_data = (double *)calloc(64, sizeof(double));
uInt16 *buffer = (uInt16 *)calloc(MCHD_CH_AMT*(nScans+het_extra_pts), sizeof(uInt16));
uInt32 *dual_buffer = (uInt32*)calloc(MCHD_CH_AMT*(nScans+het_extra_pts+200), sizeof(uInt32)); //Furman
//uInt16 *externalch = (uInt16*)calloc(16), sizeof(uInt16));
try {
if (!getRawData(dual_buffer, nScans+het_extra_pts)) {
return false;
}
for(int d=0; d<nScans*MCHD_CH_AMT; d+=128){ //Discarding extra data from 16 external inputs and unused channels (up to 256) and skip first channel
for (int a=0; a<64; a+=16){ //Separating the upper and lower words of the 32 bit samples dbuffer[0]->buffer[16,0], etc.
for (int b=0; b<8; b++){ //FIFO reads out even then odd channels 0246...1357
buffer[(2*a)+(2*b)+d]=(uInt16)dual_buffer[a+b+(d+1)];
buffer[(2*a+16)+(2*b)+d]=(uInt16)(dual_buffer[a+b+(d+1)]>>16);
buffer[(2*a)+(2*b+1)+d]=(uInt16)dual_buffer[a+(b+8)+(d+1)];
buffer[(2*a+16)+(2*b+1)+d]=(uInt16)(dual_buffer[a+(b+8)+(d+1)]>>16);
}
}
}
.................................
if (scanType == AccumulationScan) {
for (int s = 0; s < nScans; ++s) {
for (int c = 0; c < MCHD_CH_AMT; ++c) {
raw_data[c] += buffer[MCHD_CH_AMT*s + c];
}
}
for (int c = 0; c < MCHD_CH_AMT; ++c) {
raw_data[c] /= nScans;
raw_data[c] *= MCHD_COEFF;
}
...........
__finally {
free(raw_data);
free(norm_data);
free(buffer);
free(dual_buffer);
delete[] bad_points;
}
return true;
}
This is the system information form NI MAX:
Operating System(OS) Windows 7 Professional
OS Version 6.01.7601
OS Info Service Pack 1
Processor Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz / x86 Family 6 Model 60 Stepping 3 / GenuineIntel / 3299 MHz
Number of Processors 4
Physical Memory 3.20 GB of RAM
Drive C:\ 108 GB of 232 GB free
National Instruments Software: Version:
CVI Run-Time 8.1.1.361
NI-DAQmx Device Driver 15.5.1f0
NI-DAQmx ADE Support 15.5.1
NI-DAQmx MAX Configuration 15.5.1
NI I/O Trace 15.0.0f0
IVI Compliance Package 4.0
LabVIEW Run-Time 2012 SP1 f5 12.0.1
Measurement & Automation Explorer 15.3.0f0
Measurement Studio Visual Studio 2005 Support - See individual versions below.
DotNET
Common 8.7.20.131
Measurement Studio Visual Studio 2010 Support - See individual versions below.
DotNET
Common 15.1.40.49152
Common (64-bit) 15.1.40.49152
NI-USI 1.0.2
NI PXI Platform Services Configuration 15.0.0f1
NI PXI Platform Services Runtime 15.0.0f1
NI-PAL Software 15.1.0
LabVIEW SignalExpress 3.5
NI System Configuration 15.3.0f0
NI-VISA 15.0.1
NI-VISA Runtime 15.0.1
LabVIEW Run-Time 2014 SP1 f3 14.0.1
LabVIEW Run-Time 8.0.1 8.0.1
LabVIEW Run-Time 8.2.1 8.2.1
LabVIEW Run-Time 8.5.1 8.5.1
LabVIEW Run-Time 8.6.1 8.6.1
LabVIEW Run-Time 2009 9.0.0
if (nRawScans>5000) {
last_error = "Bad number of accumulations" ;
return false;
}
MeasurementTask acq_task;
//One 32bit channel with 16 bit upper and lower words
DAQ_ERR( DAQmxCreateDIChan(acq_task.h(), DAQ_DEVICE"/port0_32", "Port32", DAQmx_Val_ChanForAllLines) );
DAQ_ERR( DAQmxCfgSampClkTiming(
acq_task.h(),
NULL, //internal clock
10e6, //10 MHz
DAQmx_Val_Rising,
DAQmx_Val_FiniteSamps, //DAQmx_Val_ContSamps
MCHD_CH_AMT*nRawScans) );
DAQ_ERR( DAQmxCfgBurstHandshakingTimingExportClock(
acq_task.h(),
DAQmx_Val_FiniteSamps, //DAQmx_Val_ContSamps
MCHD_CH_AMT*nRawScans,
10e6, //10 MHz
"/"DAQ_DEVICE"/PFI4",
DAQmx_Val_ActiveHigh, //the polarity for exported sample clock: active high or active low
DAQmx_Val_High, //whether the task pauses while the signal is high or low
DAQmx_Val_ActiveHigh) ); //the polarity for the Ready for Transfer event (System Ready)
double timeout_sec = 10.0 + nRawScans/1e3; //sec timeout, 1e3 = 1 kHz
bool interactive_wait = false;
if(interactive_wait) {
DAQ_ERR( DAQmxStartTask(acq_task.h()) ); // don't forget to Stop Task
int time0=GetTickCount();
unsigned long isDone=false;
do {
Application->ProcessMessages();
DAQ_ERR( DAQmxIsTaskDone(acq_task.h(), &isDone) );
if(isDone) {
break;
}
if( (GetTickCount()-time0)> int(1000*timeout_sec) ) {
Application->MessageBox("Error", "Multi-channel data not ready in time", MB_OK);
break;
}
}
while(!isDone);
}
int32 nRead = 0;
DAQ_ERR( DAQmxReadDigitalU32(
acq_task.h(),
MCHD_CH_AMT*nRawScans,
timeout_sec,
DAQmx_Val_GroupByChannel,
dbuffer,
MCHD_CH_AMT*nRawScans,
&nRead,
NULL) );
if (nRead != MCHD_CH_AMT*nRawScans) {
last_error = "Less amount of data was read";
return false;
}
if(interactive_wait) {
DAQ_ERR( DAQmxStopTask(acq_task.h()) );
}
/*thr_buffer = buffer;
thr_counter = nRawScans*MCHD_CH_AMT;
thr_request_scan = true;
while (thr_counter);
return true;
}
.................................
bool MultiChDetector::getScanDataS(float *destBuffer, ScanType scanType, bool subtractBackground, bool divideReference) {
bool requestOK;
bool* bad_points;
bad_points = new bool[MCHD_CH_AMT];
int het_extra_pts = 0;
if (scanType==SetPhase12){
het_extra_pts=3;
}
double *raw_data = (double *)calloc(MCHD_CH_AMT, sizeof(double));
double *norm_data = (double *)calloc(64, sizeof(double));
uInt16 *buffer = (uInt16 *)calloc(MCHD_CH_AMT*(nScans+het_extra_pts), sizeof(uInt16));
uInt32 *dual_buffer = (uInt32*)calloc(MCHD_CH_AMT*(nScans+het_extra_pts+200), sizeof(uInt32)); //Furman
//uInt16 *externalch = (uInt16*)calloc(16), sizeof(uInt16));
try {
if (!getRawData(dual_buffer, nScans+het_extra_pts)) {
return false;
}
for(int d=0; d<nScans*MCHD_CH_AMT; d+=128){ //Discarding extra data from 16 external inputs and unused channels (up to 256) and skip first channel
for (int a=0; a<64; a+=16){ //Separating the upper and lower words of the 32 bit samples dbuffer[0]->buffer[16,0], etc.
for (int b=0; b<8; b++){ //FIFO reads out even then odd channels 0246...1357
buffer[(2*a)+(2*b)+d]=(uInt16)dual_buffer[a+b+(d+1)];
buffer[(2*a+16)+(2*b)+d]=(uInt16)(dual_buffer[a+b+(d+1)]>>16);
buffer[(2*a)+(2*b+1)+d]=(uInt16)dual_buffer[a+(b+8)+(d+1)];
buffer[(2*a+16)+(2*b+1)+d]=(uInt16)(dual_buffer[a+(b+8)+(d+1)]>>16);
}
}
}
.................................
if (scanType == AccumulationScan) {
for (int s = 0; s < nScans; ++s) {
for (int c = 0; c < MCHD_CH_AMT; ++c) {
raw_data[c] += buffer[MCHD_CH_AMT*s + c];
}
}
for (int c = 0; c < MCHD_CH_AMT; ++c) {
raw_data[c] /= nScans;
raw_data[c] *= MCHD_COEFF;
}
...........
__finally {
free(raw_data);
free(norm_data);
free(buffer);
free(dual_buffer);
delete[] bad_points;
}
return true;
}
This is the system information form NI MAX:
Operating System(OS) Windows 7 Professional
OS Version 6.01.7601
OS Info Service Pack 1
Processor Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz / x86 Family 6 Model 60 Stepping 3 / GenuineIntel / 3299 MHz
Number of Processors 4
Physical Memory 3.20 GB of RAM
Drive C:\ 108 GB of 232 GB free
National Instruments Software: Version:
CVI Run-Time 8.1.1.361
NI-DAQmx Device Driver 15.5.1f0
NI-DAQmx ADE Support 15.5.1
NI-DAQmx MAX Configuration 15.5.1
NI I/O Trace 15.0.0f0
IVI Compliance Package 4.0
LabVIEW Run-Time 2012 SP1 f5 12.0.1
Measurement & Automation Explorer 15.3.0f0
Measurement Studio Visual Studio 2005 Support - See individual versions below.
DotNET
Common 8.7.20.131
Measurement Studio Visual Studio 2010 Support - See individual versions below.
DotNET
Common 15.1.40.49152
Common (64-bit) 15.1.40.49152
NI-USI 1.0.2
NI PXI Platform Services Configuration 15.0.0f1
NI PXI Platform Services Runtime 15.0.0f1
NI-PAL Software 15.1.0
LabVIEW SignalExpress 3.5
NI System Configuration 15.3.0f0
NI-VISA 15.0.1
NI-VISA Runtime 15.0.1
LabVIEW Run-Time 2014 SP1 f3 14.0.1
LabVIEW Run-Time 8.0.1 8.0.1
LabVIEW Run-Time 8.2.1 8.2.1
LabVIEW Run-Time 8.5.1 8.5.1
LabVIEW Run-Time 8.6.1 8.6.1
LabVIEW Run-Time 2009 9.0.0
And finally, this is the version of the DAQmx library header:
/*============================================================================*/
/* National Instruments / Data Acquisition */
/*----------------------------------------------------------------------------*/
/* Copyright (c) National Instruments 2003. All Rights Reserved. */
/*----------------------------------------------------------------------------*/
/* */
/* Title: NIDAQmx.h */
/* Purpose: Include file for NI-DAQmx library support. */
/* */
/*============================================================================*/
/*============================================================================*/
/* National Instruments / Data Acquisition */
/*----------------------------------------------------------------------------*/
/* Copyright (c) National Instruments 2003. All Rights Reserved. */
/*----------------------------------------------------------------------------*/
/* */
/* Title: NIDAQmx.h */
/* Purpose: Include file for NI-DAQmx library support. */
/* */
/*============================================================================*/
I know that I probably have not provided all needed information, I can attempt to describe further if needed, but as I said at the start, I really don't have much experience with computer programming
Thanks in advance for any help you may be able to provide.
↧
ANSI C capturing samples from a NI-DAQmx continuously
Good morning to the forum,
I plugged a sinusoidal signal generator to my NI-DAQmx analog to digital board and I would develop an ansi-c application to read at regular intervals ( every x ms ) the sample of every channel ( the board has 32 channels )
I would have a help with this if possible
Thank you very much
Best Regards,
Franco
↧
ANSI C: deal with something on every rising edge input
Hi everyone,
I need your help with this situation. Here is some information about my project.
NI USB-6501
NIDAQmxBase370, NIDAQ1501f3
Visual C++ 2008, Windows XP
What I need to do is:
There is a periodic signal input from the board to my computer.
The input period is ~ 330 ms. The pulse width is ~ 0.7 ms.
I need to deal with something every time the pulse appears.
I tried to do this by reading continuously, but some of the pulses were missed because my program can only deal with this data-reading thread every 1 ms.
Is there any smarter way to do this please?
I would have a help with this if possible.
Thank you very much!
Best Regards,
Liyan
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an Issue Importing C++ dll library
HI all,
THis is my first time n this form, Hopefully I am doing this right and I'm in the right place to ask the right question,
I have a problem importing my VC++ dll to labview using the tools>> import>>shared library.
The Issue is:-
When I navigate import>> shared library and follow the wizard and select my dll and my header file and hit next I can't see the functions in the my library. However if i go back and select shared library not in local machine and hit next I can see all the functions in my header files (which is a good step). but after following the wizard and it creates the subvi for my funcation and try to use it it errors out the following error
"Call Library Function Node "Mydll" myfunction: function not found in library" The function name specified for this node cannot be found in the library. Right-click the Call Library Function node and select Configure, then choose the correct function name
I know that in my dll I have to instantiate an object then call my function as following :-
SNS myObject
myObject.Myfunction ();
But I'm not sure how can i do that in Labview because the wizard generates subvis that calls myfunction"
Anyone here can help ? and I would like to find a solution without needing to write a C wrapper , I am sure there must be away to do that ????
Thanks
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Error:C2664 in Visual Studio 2015
Using:
Visual Studio 2015
NI-Usb6289
problme:C2664 'int32 DAQmxReadAnalogF64(TaskHandle,int32,float64,bool32,float64 [],uInt32,int32 *,bool32 *)': cannot convert argument 5 from 'float64 [2][1000]' to 'float64 []' .
if I use this function
"DAQmxErrChk(DAQmxReadAnalogF64(taskHandleTemperture, 1000, 10.0, DAQmx_Val_GroupByChannel, data, 2000, &read, NULL));",
the rule just can put in the one-dimensional array (only temperature or voltage), how can I use this function to read temperature and voltage in the same time?
this my initial contact, thank you for your help
complete code:http://codepad.org/rNTt12V2
A partial code:
int32 CVICALLBACK EveryNCallback1(TaskHandle taskHandleTemperture, int32 everyNsamplesEventType, uInt32 nSamples, void *callbackData)
{
int32 error = 0, written, j = 0;
char errBuff[2048] = { '\0' };
static int totalRead = 0, flag = 1, flag1 = 1, flag2 = 1;
int32 read = 0;
float64 data[2][1000], tmp, tmpT, dataVout[4000];
static float k = 0;
static float64 foreverbig;
/*********************************************/
// DAQmx Read Code
/*********************************************/
DAQmxErrChk(DAQmxReadAnalogF64(taskHandleTemperture, 1000, 10.0, DAQmx_Val_GroupByChannel, data, 2000, &read, NULL));
if (read > 0) {
for (int i = 0; i < 999; i++) {
fprintf(fp, "%0.3f %+0.4e %f\n", k, data[0][i], transferVoltage(data[0][i])); //Temperature 1
fprintf(fp1, "%0.3f %+0.4e\n", k, data[1][i]); //Voltage
k = k + 0.001;
}
for (int m = 0; m < 998; m++) {
for (int n = 0; n < 998 - m; n++) {
if (data[0][n + 1] > data[0][n]) {
tmpT = data[0][n];
data[0][n] = data[0][n + 1];
data[0][n + 1] = tmpT;
}
}
}
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Future support
Hi all,
I'm starting again developing sw that interfaces with NI boards. In the past I used legacy Nidaq library under Visual Studio 6.0. Now I want to start again with a more up to date design. I'm thinking to Measurement Studio or only Nidaqmx libraries. There is a plan for a future support to Measurement Studio. Why the last update is for Visual Studio 2013?
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