On 16 December 2012 22:50, Wander Lairson Costa <wander.lair...@gmail.com> wrote: > 2012/12/16 ragman <gaza...@gmail.com>: >> Hi Folks, >> >> USB newbie here. I'm trying to (understand and) read data from an >> interrupt endpoint: >> Endpoint Descriptor: >> bLength 7 >> bDescriptorType 5 >> bEndpointAddress 0x81 EP 1 IN >> bmAttributes 3 >> Transfer Type Interrupt >> Synch Type None >> Usage Type Data >> wMaxPacketSize 0x0008 1x 8 bytes >> bInterval 8 >> >> using: >> print dev.read(0x81,8,0,1000) >> >> But I'm getting timouts every time, no matter the timout setting. As >> I'm still learning USB I'm guessing I misunderstand (most of it) >> interuppt endpoints. >> >> busdog shows me that the native software reads 2 bytes device every 60 >> seconds. >> Any help would be...helpful and much appreciated. >> > > Did you issue a set_configuration()? > > -- > Best Regards, > Wander Lairson Costa >
Thanks Wander, Yes I did and can send ctrl_transfers to it successfully. Cheers, D ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
