Hello,

i'm a new to USB. In the last day's i read different Linux USB
documentation, but now i have a question.
Maybe someone is so nice and give me some help.

I would like to write a driver for a unsupported USB device. The USB device
itself is very simple.
I only need a function for userspace applications to send the device 2 Bytes
and i need a function to
read 6 Bytes from the device. The traffic  (isochronous transfer) will be
very very low and not critical, 
so i think a userspace driver (if possible) would do it. 

I read that nearly all functions (necessary to develop a USB driver) are
also be available through the
usbdevfs from userspace. In /proc/bus/usb/... i can find some files helping
a userspace program to identifiy 
USB devices and so on, but i found no way to make transfers with the
devices. Can anybody help me to
get information how to make transfer in userspace?

I've found a project called libusb. With this library it is also possible to
access generic USB devices from userspace.
Unfortunatelly it doesn't support isochronous transfers (not yet).

Thank's in advance!
Michael


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