hey guys! can somebody gv me ideas or hints on how to control any device through USB, using the C++ language? thanks!

Umm, don't take me for a Linux God or anything, but I have some thoghts on the issue I'm just sharing since no-one else is replying

but wouldn't you rather communicate with your device through your driver or kernel or whatever? this will be safer and ensure more portability of your program. But I'm sure you know all that anyway.

On home computers in the early eighties you'd solder up a piece of hardware, plug it in, and then write a program to use it, in the computer's built in language. But this isn't something people do these days.

Anyway, what are you looking to communicate with?
If you want to send a string to a port, then use something like

echo "we like sheep" > /dev/ttyS0

I have a teletype on ttyS0, so I get this text appear on there.

Do you have the interface definition for the device?

Without getting into writing your own kernel drivers, there are a couple things you can use. For user-level access to usb functions have a look at libusb. There is an LQ article here:

http://www.linuxquestions.org/linux/...ing_Libusb_API

(read the comments also). For the USB human interface device protocol there is also libhid:

http://libhid.alioth.debian.org/

Both these will let you interact with USB devices with C++ code.