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i need to send and receive data to/from a microcontroller using java using usb
i connect the micro to the Pc unig usb to serial cable and need to pass data to the micro
Take a look at http://sourceforge.net/projects/javax-usb/
I suspect it will not be plain sailing for you. Grab that library, try to write some USB interactions. I did it once a long time ago [code] and the hardest part was figuring out what bytes I needed to send down the cable.
Come back here with some fully-formed questions (with code samples and error messages where appropriate) when you have any problems you can’t solve yourself.