Expanding on what liyaoshi just posted. I remember someone else having a similar problem but with a different device. His solution was to cut the power wire feeding back from the USB hub back into the beaglebone. However, as said above he / she used a different device, and the device its self was not showing up at all under lsusb output. Also, I'm fairly sure the USB hub was self powered.
On Mon, Nov 24, 2014 at 7:14 PM, liyaoshi <liyao...@gmail.com> wrote: > check your usb hub power supply ? > > 2014-11-25 0:29 GMT+08:00 Teis Draiby <t...@teis.net>: > >> >> I am currently communicating between my Beaglebone and a Maple board via >> a serial connection directly through a USB cable. This works well. >> (LeafLabs Maple is an Arduino-like board with an on-board USB connector) >> >> Due to power requirements I want to relpace the direct USB connection >> with a power supplied USB hub but when connecting the Maple board this way >> I do no longer see the serial device listed. >> >> I am new to Linux/Debian and am unsure what to do from here, and if it's >> even possible to perform serial communication through an USB hub. >> >> >> ----------------------------------------------------------------------------------------------------- >> Direct USB(Beaglebone)-to-USB(Maple) serial communication (works) >> >> ----------------------------------------------------------------------------------------------------- >> Beaglebone terminal: >> >> # uname -a >> Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l >> GNU/Linux >> >> # lsusb >> *Bus 001 Device 003: ID 1eaf:0004* >> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >> >> # ls /dev/ttyA* >> */dev/ttyACM0* >> >> >> -------------------------------------------------------------------------------------------- >> Serial communication through USB hub (missing serial device?) >> >> -------------------------------------------------------------------------------------------- >> Beaglebone terminal: >> >> # lsusb >> *Bus 001 Device 002: ID 05e3:0612 Genesys Logic, Inc. *<- this only >> shows up when using a special hd-USB cable. >> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >> >> # ls /dev/ttyA* >> ls: cannot access /dev/ttyA*: No such file or directory >> >> # ls /dev/ttyU* >> ls: cannot access /dev/ttyU*: No such file or directory >> >> >> -------------------------------------------------------------------------------------------- >> >> >> Any advice from here is greatly appreciated. >> >> >> thanks, Teis >> >> -- >> 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. >> > > -- > 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. > -- 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.
