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How to access USB-8451 I2C functions correctly via MAX ?

Dear All,

        I am trying to use USB-8451 I2C functions via MAX (Measurement & Automation Explorer) VISA Test Panel. Does anyone of you have such experience ? Please share with me. How can I access USB-8451 I2C functions via MAX (Measurement & Automation Explorer) VISA Test Panel ? Your help is highly apprecaited.

        By the way, I also tried to use compiled function (*.dll) to control USB-8451. I followed the examples to execute I2Cwrite function and I got correct return value (0). But I can't see any signals coming out from SDA or SCL port using a oscilloscope. Is there anything wrong ? How to access the USB-8451 I2C functions correctly ? Thank you very much.

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正常來說I2C的DATA是通過SDA雙向溝通,所以需要Master/slave handshaking,
如果直接用示波器去勾,在第一次送訊號時應該可以看到SCL(clock)訊號(要接地線)。
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剛好最近實驗室有一台設備有8451 port.
after connect device <<  >> NI USB-8451 & ok.
 
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