LibFTDI/LibUSB 1.0 and Asyncrhonous I/O on FreeBSD

[Hans Petter Selasky]

On 07/23/13 20:10, CeDeROM wrote:
> Hello :-)
>
> LibUSB 1.0 introduced Asyncrhonous I/O [1] which in conjuction with
> LibFTDI 1.0 [2] gives significant performance improvement on FT2232*
> based chips used in various UART/JTAG/SWD interfaces. I am working on
> LibSWD [3] and would like to use this Asyncrhonous I/O on my FreeBSD
> box. I know there is an internal BSD implementation of LibUSB, so my
> question is it possible to use this Asynchronous I/O with FreeBSD
> implementation of LibUSB, or more specifically is it possible to use
> LibFTDI 1.0 to improve speed of my driver for FT2232 chip? :-)
>
> Any hints appreciated! :-)
> Tomek
>
> [1] http://www.libusb.org/wiki/libusb-1.0
> [2] http://www.intra2net.com/en/developer/libftdi/
> [3] http://libswd.sf.net
>

Hi,

It is implemented and should work! Please note that you should not mix 
synchronous and asynchronous requests, with exception of control 
transfers. If you are programming a bulk endpoint, use either all 
synchronous or all asynchronous.

--HPS