how to display and save data read from an ADC via rs232

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pengsun
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how to display and save data read from an ADC via rs232

Сообщение pengsun »

i can use labview to read data sent from a 12bits A/D converter via rs232. these data are from two channels of the ADC, one channel is for x, the other is for y. x and y was sent alternatively. my next step is to treat (times factors for x and y), and then sort these data, even is for y and odd is for x, i want to plot x and y, and save these data in a spreadsheet(three columns, one for x, one for y, one for time) . the total numbers of data is unpredictable, but, typically less than 10k. could you please show me how to do that
thank you very much
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dadreamer

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Re: how to display and save data read from an ADC via rs232

Сообщение dadreamer »

You could implement the following algorithm:
Snippet.png
Instead of the producer loop you should place your data acquisition loop. But I did not quite understand your time processing method. In general, time for x and time for y has to be different, and you cannot simply insert it as third column into spreadsheet file because it wouldn't match x or y values. In my example I used just even time values (50 for one column: x or y), odd values are not used, but you may need them.
pengsun
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Re: how to display and save data read from an ADC via rs232

Сообщение pengsun »

Hi, dadreamer:
thank you very much for your reply.
since I just start to use LabView, I am wondering if you could please attach the vi file. I do not quite understand what some of the labview palettes are for.
again, thank you
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dadreamer

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Re: how to display and save data read from an ADC via rs232

Сообщение dadreamer »

pengsun, this is Snippet. That means you can save it on the hard disk, drag 'n drop onto LabVIEW diagram and you get the code!
http://www.ni.com/white-paper/9330/en/
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