How can I display a .csv file as a real time waveform using labview

[simonious]

Hi folks.

As stated, Im looking to display a .CSV file (obtained via RS-232, example; 100,101,102,102,102,103...) as a waveform in real-time. What is the best way to approach this? Im thinking LabVIEW. I have version 7.1 but am not really experienced in using it. I'll give anything a go though. Also, I have Visual Studio 2005, so I was thinking VB???

Thanks in advance!

Simon.

Message Edited by simonious on 10-26-2007 04:13 AM

[andre.buurman@carya]

Have a look at this VI.

Add a convert string to number function behind it.

André

Message Edited by andre.buurman@carya on 10-26-2007 01:08 PM

[simonious]

Thanks for that. I cant seem to acces the block diagrams etc, its password protected. Also, I should have mentioned that the data is constantly being transmitted via RS-232 in .CSV format. I want to display this data as a waveform in real-time.

Thanks!

[Dennis_Knutson]

The process is pretty simple with the Spreadsheet to Array function. A basic application is shown below.

[simonious]

Cool, looks simalar to what I was "trying" to put together. Big help, thanks guys.

[parthabe]

Andre,

Is it such a high-complexity code that it is password-protected... ?!

Can you post one without password?

[andre.buurman@carya]

No, try "crankstel", without the quotes.

I forgot the VI had a password.

I thought lets be nice a give away a VI in LV 7.1, so more people can access it.

André

[simonious]

Thanks for that. But Is this process adequate for real time? Itt seems to me that the visa is collecting 100 bytes into its buffer and then displaying them. I need to constantly be displaying the waveform.

Thanks for all the help.

[simonious]

I came up with this... At the moment it captures 1000 bytes of data from the serial port and plots the .CSV data (integers) as a waveform. It works well except I need this to work continuously (real-time). I added the while loop, but it doesnt seem to do anything. Any hints? Thanks!

[simonious]

Slight modification, I added a chart instead. I can now see a real-time representation but the chart tends to reset every now and then. I think this is due to the VISA input "number of bytes to read". If i have it on 5 it will work when the data is --> 1199,2299,2255,5599, etc (4 numbers then comma), but when this happens --> 5509,5544,339,555, etc (one value or more with 3 numbers then comma) the chart will start resetting etc. Im not sure how to overcome this??? The new VI is attached.