A question about Robert's comments....my USB devices are powered with their own supply though. In this case neither of the devices should be requesting the full 500mA.
Anything I try To make this work with an unpowered USB HUB? -Karina Sent from my iPhone > On Mar 22, 2016, at 7:18 AM, Robert Nelson <robertcnel...@gmail.com> wrote: > >> On Tue, Mar 22, 2016 at 8:56 AM, Karina Bond <karina.b...@gmail.com> wrote: >> >> So the hub in my setup is unpowered. But I have tried powering up the USB >> devices first. Then powering up the beagle bone . In this case the two USB >> show up in the output of 'lsusb'. >> >> I am working on finding a powered USB hub to try this with. But ideally I'd >> like to use an unpowered hub. > > Not going to happen... Use a powered hub.. > > USB is not magic, it needs a specific amount of power on startup to > correctly enumerate a device. By using an un-powered hub, with > multiple downstream devices, as soon as the "first" requests the full > "500mA" vs it's initial "100mA", the other device's chances of being > detected is toast... > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ -- 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. For more options, visit https://groups.google.com/d/optout.
