On Thursday, August 31, 2017 at 5:20:06 PM UTC+3, RobertCNelson wrote: > > On Thu, Aug 31, 2017 at 9:15 AM, Tarmo Kuuse <tarmo...@gmail.com > <javascript:>> wrote: > > On Thursday, August 31, 2017 at 5:11:49 PM UTC+3, RobertCNelson wrote: > >> > >> On Thu, Aug 31, 2017 at 9:07 AM, Tarmo Kuuse <tarmo...@gmail.com> > wrote: > >> > I've been reading the am335x_evm.sh & friends for a while and don't > get > >> > it. > >> > Why are there two separate Ethernet over USB interfaces - eth0 and > eth1 > >> > - > >> > doing the same exact thing? They both show up when I connect a BB to > my > >> > Debian PC. > >> > > >> > Having no experience with gadget and libcomposite, I'd guess that > RNDIS > >> > and > >> > CDC ECM are both required simultaneously to somehow support > >> > Windows/Mac/Linux users out of the box? > >> > >> So this is Windows and Apple's fault.. > >> > >> Windows = CDC ECM = needs signed driver.. > >> Apple = RNDIS = needs signed driver... > >> > >> Windows will use the RNDIS with a built-in driver, thus user doesn't > >> have to install anything... > >> Apple will use the CDC ECM with a built-in driver, thus user doesn't > >> have to install anything... > >> > >> So in linux, we end with two interfaces, because Windows and Apple > >> don't have a unified built-in driver... > > > > > > Fair enough, thanks for the explanation. > > > > Since the comments in "autoconfigure_usb1.sh" say it's handling CDC/ECM, > I > > assume that the other one (usb0) does RNDIS. > > it's only because we enable rndis first thus it becomes usb0: > > > https://github.com/RobertCNelson/boot-scripts/blob/master/boot/am335x_evm.sh#L503-L531 > > > Regards, > > > -- > Robert Nelson > https://rcn-ee.com/ >
Okaaaay ... /long blank stare/ ... I think I mostly get it now. The sysfs hierarchy groups them both under "functions/*.usb0" which is an excellent red herring :) -- Tarmo -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/b1a20d7e-071c-4da3-8d8c-652e1d3a6138%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
