Hello all,
I am trying to figure out how to combine Ni-DAQmx with matlab. Where I have a license for LabWindows/CVI, I want to build a so-called mex-DLL with the matlab compiler LCC. I succeeded but do not know why!
First I tried to build/link a NI-DAQmx application with the use of nidaqmx.h and nidaqmx.lib from the NIDAQ distribution. These files can be found in the subdirectory \Program Files\National Instruments\NI-DAQ\DAQmx ANSI C Dev\lib\msvc. This did not work. I got an error that there are undefined references in the object file e.g. undefined reference to
'_DAQmxReadAnalogF64@36'.
Next I used a different library from \Program Files\National Instruments\CVI80\extlib\msvc. This one did work.
I did not change the path for the include, but made a copy of the h-file and lib-file to the defaults for LCC.
I did change the linker-options for LCC ie added nidaqmx.lib to the list of libraries.
How come that the ansi-c version from the NIDAQ distribution did not work, while the CVI distribution seems to be fine ? Or: what is the difference between these two library files ?
Can I correct/adapt the NIDAQ distribution e.g. with a define or an extral include ? Or do I always need the Labwindows extlib version ?
Jos
