Using RevC produce similar problems. New power adaptors, same problems.
On Sunday, February 2, 2014 at 11:18:36 AM UTC+1, MV wrote: > > With a new power adaptor (BBB side) no more noise, but same problems. > When reboot BBB does not more recognize USB port, and the connected > arduino USB-serial. > > Unplug arduino power and reboot via software: BBB does not reboot. > Press reset button: BBB restart, recognize USB, exchange data with arduino. > > But I need Arduino self powered. > > Nobody else had the same problem ? > > > On Friday, December 20, 2013 2:45:42 PM UTC+1, MV wrote: >> >> Hi! >> >> It is a noise from a socket type power adaptor. >> What really matter is that BBB does not more recognise USB, even if >> reboot. >> >> I tryied many USB-RS232 adapters (without external powering USB slaves). >> The connection is unstable. >> dmesg show ftdi related problems (unable to change speed or other iocntl). >> >> BBB is powered with only 1A adaptor. >> I'll try a better one. >> >> Il giorno giovedì 12 dicembre 2013 20:44:39 UTC+1, Gerald ha scritto: >>> >>> I have not heard that noise before. >>> >>> Gerald >>> >>> >>> >>> On Thu, Dec 12, 2013 at 12:33 PM, MV <aga...@gmail.com> wrote: >>> >>>> Problems arise anyway after random time with ftdi USB-RS232 adapters. >>>> >>>> If I connect a self powered HUB or self powered Arduino I can ear >>>> something become noisy: "zzzzzzzzzzz...". >>>> >>>> Is this a known problem ? >>>> >>>> Thanks >>>> >>>> >>>> >>>> >>>> -- >>>> 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...@googlegroups.com. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- 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.
