Re: [beagleboard] Support for multiple USB CCID devices
On Tue, Mar 25, 2014 at 10:18 AM, Gavin Williams wrote: > Afternoon all > > I'm currently looking at hardware req's for a new project, where we need to > support 50 USB CCID devices on a single host. > > The devices in question are OmniKey 6121 USB thumb drives, and will be > connected to a 49 port Cambrionix USB hub, which contains 7 7-port hubs. > > Is this something that the BeagleBoard-xM is likely to be able to support? Honestly, even on x86 with that many devices, you'll run out of usb bandwidth on a single ehci port. Go test it, it'll likely fail after 4-5 of those devices. Regards, -- Robert Nelson http://www.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.
Re: [beagleboard] Support for multiple USB CCID devices
I feared as much... Some testing on an old x86 desktop running CentOS 6 started showing issues after plugging in 20 OmniKey devices... Any recommendations on what sort of hardware I should be looking for? Cheers Gav On 25 March 2014 15:22, Robert Nelson wrote: > On Tue, Mar 25, 2014 at 10:18 AM, Gavin Williams > wrote: > > Afternoon all > > > > I'm currently looking at hardware req's for a new project, where we need > to > > support 50 USB CCID devices on a single host. > > > > The devices in question are OmniKey 6121 USB thumb drives, and will be > > connected to a 49 port Cambrionix USB hub, which contains 7 7-port hubs. > > > > Is this something that the BeagleBoard-xM is likely to be able to > support? > > Honestly, even on x86 with that many devices, you'll run out of usb > bandwidth on a single ehci port. > > Go test it, it'll likely fail after 4-5 of those devices. > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/XLexmHdQZTQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- 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.
[beagleboard] Support for multiple USB CCID devices
Afternoon all I'm currently looking at hardware req's for a new project, where we need to support 50 USB CCID devices on a single host. The devices in question are OmniKey 6121 USB thumb drives, and will be connected to a 49 port Cambrionix USB hub, which contains 7 7-port hubs. Is this something that the BeagleBoard-xM is likely to be able to support? Thanks in advance for your time, and feel free to ask any questions. Regards Gavin -- 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.
