using C language to work with DAQ

[Aung Myo Thant sin]

Hi All ,

 I am wondering whether can i create a C program that

(1) read the data from DAQ channel  : the output signal from the tachometer

(2) make some calculations

(3) again out put the calculated data  : the  input signal to the motor .

Any example program available out there ?

Thanks in advace

[Paul_C.]

Hi Aung Myo Thant Sin,

All of my answers assume that your using a DAQ card within its specifications.

(1) read the data from DAQ channel  : the output signal from the tachometer

Yes, you can create an analog input task to read information from one of your analog input channels.

(2) make some calculations

Yes, you can make calculations to the array of data that comes in from the analog input.

(3) again out put the calculated data  : the  input signal to the motor .

Yes, however, you will need to create an additional analog output or counter output task to create the type of signal required by your motor.

There are quite a few examples that are shipped with DAQmx.  Click here for the knowledge base that includes the location of the examples.  I would recommend taking a look at both the analog input examples and the analog output examples that fit your project.  You will need to combine the code into the same C project.  Another good resource for programming NI-DAQ applications in a text-based program can be found here.  Take a look at the links at the bottom for more specific information.

I hope this helps,
Paul C.

Message Edited by Paul C. on 08-20-2007 12:20 PM