Re: [Libusb-devel] USB 2.0

[Tim R. <ti...@pr...>]

Dan Leite Martins wrote:
> I'm new to the list. I'd like to know what is needed to the lib so it can "talk" to 2.0 usb devices at full speed. I'm sorry if this has been already discussed, but I couldn't access the archives. Thanks in advance.
>   

Peter already provided an answer for this, but it occurred to me that
your question could mean one of several things.  The term "full speed"
is somewhat overloaded.  It could mean "at the maximum speed possible",
in which case Peter was right all along.

But "full speed" is also the official term for the higher 12Mbps bit
rate offered by USB 1.x, which is the middle speed grade for USB 2.0. 
The maximum speed rate in USB 2.0 is called "high speed".  So, you MIGHT
have been asking "Can I talk to a USB 2.0 device as if it were hooked up
to USB 1.1?"  That has a very different answer (no).

-- 
Tim Roberts, ti...@pr...
Providenza & Boekelheide, Inc.