libusb performance on 8.1

Daniel O'Connor doconnor at gsoft.com.au
Fri Feb 4 04:49:08 UTC 2011


On 04/02/2011, at 14:32, Daniel O'Connor wrote:
> OK, I have that, it seems I need to work on the firmware as it's not sending data properly when I set it to iso. I'll work on that and try and figure it out. Unfortunately there isn't much example code on isochronous data transfer with the FX2 :(
> 
> However I see the requests return saying they are complete but the amount of data transferred is 0. Setting the "short not OK" flag doesn't change the behaviour.
> 
> I'm not sure if this is a bug in libusb, expected behaviour, or a bug in my program.

I think this might be the FX2 sending zero length packets because its FIFO is empty.

Now to figure out why it isn't triggering :-/

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C








More information about the freebsd-usb mailing list