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Niel
User
Joined: 10 Jan 2007
Posts: 2
Location: New Zealand
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 Posted: Wed Jan 10, 2007 7:51 pm Post subject: Assistance offered for VEE support |
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Hi, I'm an electronic engineer in New Zealand. My job is developing ATE (automated test equipment) for the electronic products that our company manufactures ([url]www.trutest.com[/url]). We currently have 5x ADC212/50 scopes in our factory measuring the performance of electric fence energizers. If anyone is stuck with VEE and the Pico DLL, feel free to contact me as well.
Cheers,
Niel |
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neilhutcheon
Newbie
Joined: 23 Mar 2007
Posts: 1
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| Posted: Fri Mar 23, 2007 11:27 am Post subject: Creating a continuous loop for VEE program |
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Hi Niel,
I'm a final year student at the University of Edinburgh and am currently workin on my BEng honours project which is to create control software for a digital microfluidic system.
I am using Agilent VEE to enable me to create a pulse which is to be sent to a Keithley controllable voltage source using direct I/O.
The pulse which is to be sent will only have to operate at a maximum of 20Hz and pulse between 0 and 50V. I have tried the pulse generator provided but it is not recognised by the Keithley device.
I have also tried to create my own loop. Whereby I send a value of 0V to the device then delay followed by a command of 50V, the problem I encounter is that this will only execute for one cycle. Are you aware of a technique which will allow this to continue until a break command is called?
Also, if there is a more efficient way of producing this program any suggestions will be most appreciated.
Thanks for your help.
Neil. |
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Niel
User
Joined: 10 Jan 2007
Posts: 2
Location: New Zealand
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| Posted: Sun Mar 25, 2007 8:09 pm Post subject: |
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In VEE go to Flow -> Repeat -> Until Break. There are also Next and Break objects in the same menu.
Do you need accurate timing? If so, then the Delay object will not be good enough. Windows has a timer counter into which you can hook with a DLL. One of our software engineers created a DLL for me to expose this Windows function and it is very accurate (the most accurate available on a PC).
I think VEE is probably one of the best applications for what you want to do. You can also use other programming languages, but they focus on programming rather than hardware interfacing or getting data out in a usable format. The alternative to VEE is LabView from National Instruments.
All the best,
Niel |
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