On E series Card with 2 counters I want to generate a fixed length pulse train and want to continuously monitor it.

Depending on the software you are using, there are many shipping examples and example programs on the web that illustrate generating a finite pulse train. The E series boards have the DAQ-STC counter/timer chip, and so make sure you search for DAQ-STC examples. I have included links to a LabVIEW example and Measurment Studio Example in Visual Basic.
Generate finite pulse train in LabVIEW.
http://eagle.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3DA2156A4E034080020E74861&p_node=DZ52328&p_submitted=N&p_rank=&p_answer=&p_source=Internal
Generate finite pulse train in Visual Basic with Measurement Studio
http://eagle.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3D96156A4E034080020E74861&p_node=DZ52328&p_submitted=N&p_rank=&p_answe
r=&p_source=Internal

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Use M-Series cards with DAQmx in Matlab!

Hi DAQers!
Who is this message for?
For all people wanting to use their M-Series cards (and/or NI_CAQmx drivers) with Matlab.
Content:
Basic introduction into importing DAQmx into Matlab. Simple AI (analog input), advanced AI (synchronous)
and simple AO solutions are displayed with Matlab source code.
Motivation:
There's probably little disagreement that the new M-Series cards are superior to the old E-Series cards.
However, Matlab does (as of February 2005) not support either directly.
By buying the Data Acquisition Toolbox you can access most of the E-Series' functions from within Matlab.
But this will not help you with your new M-Series card! But it is possible to use M-Series cards with Matlab.
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If your version of Matlab is too old to provide the "loadlibrary" function directly, download it here:
http://www.codeproject.com/dll/MatlabGenericDll.asp?df=100&forumid=26247&exp=0&select=972623
After importing, you see the list of available functions.
You can also display them by
libfunctionsview('myni')
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you have access to those functions. One special thing you need to keep in mind is the fact that pointers
work differently in Matlab than in C. This problem can be solved by using the Matlab function "libpointer".
Sometimes Matlab does not require a pointer when C would. But I found that it does not hurt to
specify a pointer in this case. Whether Matlab expects a pointer can be seen in the output
created by libfunctionsview('myni')
The general syntax for calling DAQmx functions is:
[outputarguments]=calllib(alias,NIDAQmx_functionname,inputarguments)
My next message will show a function I wrote that enables basic and advanced analoginput.
Jens

Hi!
As promised, my Matlab function to use the M-Series card with Matlab.
I have the bad habit of programming in German and English at the same time.
I tried to correct that for this posting. I hope I succeeded!
I wrote this function to suit my needs -which it does.
Feel free to modify it to suit yours.
Jens
Edit: I just saw that my m-File is longer than 5000 characters! #duh#
Sorry!
I'll see if I can get a download up!
Here's the abbreviated m-file without synchronous AI:
function messmatrix=NImess(synchron,trigger,numofchans,samprate,samptime)
funclist = loadlibrary('nicaiu.dll','nidaqmx.h','alias','myni');
disp('NI: Create Tasks')
taskh1=uint32(1);
[a,b,taskh1] = calllib('myni','DAQmxCreateTask','master',taskh1)
taskchans1=['Dev1/ai0:' num2str(numofchans-1)];
[a,b,c,d] = calllib('myni','DAQmxCreateAIVoltageChan',uint32(taskh1),taskchans1,'',-1,-10,10,DAQmx_Val_Volts,'')
nsample=samprate*samptime; %
disp('NI: Config Sample Clock')
[a,b]=calllib('myni','DAQmxCfgSampClkTiming',taskh1,'',samprate,DAQmx_Val_Rising,...
DAQmx_Val_FiniteSamps,nsample)
disp('NI: Config Digital edge start trigger')
if trigger==1
[a,b]=calllib('myni','DAQmxCfgDigEdgeStartTrig',taskh1,'/Dev1/PFI0',DAQmx_Val_Rising );
else
[a]=calllib('myni','DAQmxDisableStartTrig',taskh1)
end
disp('NI: Start task(s)')
[a]=calllib('myni','DAQmxStartTask',taskh1)
DAQmx_Val_GroupByScanNumber = 1;
readarray1=ones(numofchans,nsample);
readarray1_ptr=libpointer('doublePtr',readarray1);
sampread=0;
sampread_ptr=libpointer('int32Ptr',sampread);
empty=[];
empty_ptr=libpointer('uint32Ptr',empty);
arraylength=nsample*numofchans; % more like "buffersize",
disp('NI: Reading Data!')
[a,readarray1,sampread,empty]=calllib('myni','DAQmxReadAnalogF64',taskh1,-1,-1,...
DAQmx_Val_GroupByScanNumber,readarray1_ptr,arraylength,sampread_ptr,empty_ptr);
disp('NI: Stop task')
[a] = calllib('myni','DAQmxStopTask',taskh1);
disp('NI: Clear task(s)')
[a] = calllib('myni','DAQmxClearTask',taskh1);
messmatrix=[readarray1'];
disp('NImess finished')

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How to use multiple counters in the 6602 to measure cycle length, calculate delay and generate triggered pulse.

Hi,
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On E series Card with 2 counters I want to generate a fixed length pulse train and want to continuously monitor it.

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