check your usb hub power supply ? 2014-11-25 0:29 GMT+08:00 Teis Draiby <[email protected]>:
> > 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 [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
