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主题: 大家都说机算机,空爷学的是卡片打洞。
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作者 大家都说机算机,空爷学的是卡片打洞。   
所跟贴 usb das最便宜的500刀就够了,看您的要求 -- 消极 - (23 Byte) 2006-7-15 周六, 下午2:35 (363 reads)
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文章标题: National instruments have (425 reads)      时间: 2006-7-15 周六, 下午10:48

作者:Anonymous罕见奇谈 发贴, 来自 http://www.hjclub.org

combined realtime ADCovertor/DAConvertor using usb port, which costs about $6000, labview is excluded.If you want to write your own C code for it, it will take 1-3 years for a professional programmer to do the job that catches 16-32 channels of data at the rate of 600hz/channel and at the same time to control 8 channels of external devices. Not only that, the one who does the job has to be with you all the time for the modifications and bugs-fixing.

National instruments bought Labview 2 or 3 year ago and labview has become very expensive since. But their on-phone or on-line advisors are very professional and helpful.

I spent 2 months of learning and implementing the software for my own purpose. It has been working fine since for a very complex task. That was 2 years ago. Now, I forgot the most of it and don't understand what I have wrote before.

The software I wrote does the same job as DAOS I used before under dos with a slow 386 machine. Because you cannot exclusively use the whole power of a windows PC, your software is interrupted periodically or unpredictablely by the WINDOWS OS. This is really a piss-off. Fortunately so far just the realtime disply is interrupted not the realtime data acquisition/control.

I dislike windows because you don't know what windows are doing.


作者:Anonymous罕见奇谈 发贴, 来自 http://www.hjclub.org
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