how can I create HWS files in labview

[rajkumar5]

hi

how can i create HWS files in labview?

[dkfire]

What is a HWS file? 
What is it used for? 

You can create any file type in LabVIEW as long as you know how the file if formated. 

[Wolfgang_Z.]

You can create .hws files with the NI-HWS VIs. If you missing this palette then install the NI-HSDIO Driver.

With the NI-HSDIO Driver you get also a bunch of LabVIEW examples.

C:\Program Files (x86)\National Instruments\LabVIEW 2015\examples\instr\niHSDIO

Alternativ you can use the NI Digital Waveform Editor to create the Digital Waveforms.

For more information please check out these links:

• What is the HWS File Format?
• Hierarchical Waveform Storage Data File (.hws)
• How Can I Generate Digital Waveforms Saved by the Digital Waveform Editor?

[rajkumar5]

Thank you so much for your informations and i would like to clearify one more question

If I want generate these programmatically what platform will be better one?

Regards,

Raj kumar.S

[Wolfgang_Z.]

You are welcome. What do you mean exactly with plattform? Do you mean PXI or PCI or which tool?

[rajkumar5]

just am asking about C or MATLAB?

[Wolfgang_Z.]

For the following languages is a NI-HSDIO driver support available. You need the NI-HSDIO driver for the PXI-6541 (you can find that in the NI-HSDIO readme):

Additional you can use Signal Express for NI-HSDIO (SignalExpress is a interactive software for quickly write out some signals to a NI devices, with no programming required) or you can program the board in native C.

You find the C examples after the installation of the driver here:
C:\Users\Public\Documents\National Instruments\NI-HSDIO\examples\c

With the listed Software above you can programmatically create a pattern and play the pattern on the PXI-6541. With Signal Express you can play the pattern but you cannot create programmatically the DIO pattern.

I'm not familiar with MATLAB^® but it looks like that other guys have created a .hws file with this tool.

How to read National Instruments HWS waveform data file in MATLAB

hws file to matlab

General documentation to .hws can be found here:

C:\Program Files (x86)\National Instruments\NI-HWS\Docs

You can play the .hws file with all tools listed above. Alternative you can save you date in a ASCII file and play the ASCII file (presupposed the file is not too large) or you write out the programmatically created DO pattern directly to the board.

[rajkumar5]

thanks for your suggestions