Re: [Libusb-devel] USB 2.0

[Peter S. <stu...@cd...>]

Hi,

On Thu, Mar 29, 2007 at 10:45:05AM -0300, Dan Leite Martins wrote:
> Hello there,
> 
> 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.

Nothing. libusb 0.1 works with 2.0 full speed devices.

Note that 0.1 is synchronous only however. Ie. only one outstanding
request on the bus at any time, which wastes a lot of bus bandwidth.

To get maximum throughput, you will need to use at libusb 1.0 or
OpenUSB and their asynchronous features to keep many transfer
queued at once.


//Peter