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VISA : USB through PIC microcontoller, writing is good, but not reading

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Hi guys;

 

I'm trying to put together a simple VISA USB read/write program to test communication from Labview to a PIC microcontroller.

I've found an example on youtube and wanted to try to implement it.

 

Well, in the owners video everything seems to work juste fine, but for me only the writing is working, I can't read data from the microcontroller.

 

Can anybody explain to me what is going wrong on this ?

Here is a the diagram.

Thank you.

Capture.PNG


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