you should use the same ground of your power supply to provide power to your powered usb hub, if you don't do this, you should consider some problems at usb data +- that anyone here could check easly without your hardware other option could be a isolated power suply and isolate usb data +-, in this case there's no problems about where's the usb hub power supply
2013/2/16 Attila <bigm...@gmail.com>: > Oops, forgot to tell - I found your earlier comments, and seems you are > using a powered USB hub. > Does anyone know, if it is safe to power USB devices directly from the same > power supply I use to power the RasPi? > > Eth0 - why you had to disable? I found a problem, when eth0 disconnect > (cable disconnect for example) stopped USB working, but after I disabled the > daemon (I cant recall its name, its reposnsible to alter networking based on > connect-disconnect events), it was resolved. > So now I have problem only on reboots. > > > On Sat, Feb 16, 2013 at 2:41 PM, Attila <bigm...@gmail.com> wrote: >> >> Martin, >> >> thanks for your valuable comments. I agree not to upgrade anything once >> its stable - I made a backup, so it was a kind of safe try... :) >> >> And after raspi reboot - does it ALWAYS find the controller? My main >> problem that mine is only sometimes, especially nowadays :( Syslog says it >> has not enough power. While I'm using a 2A power supply. I need to play a >> lot (unplug the bus, plug in USB, reboot, etc) to make it recognised / work, >> and after a reboot I can start again... >> >> I'm using USB9097 bought on pcsensor.com >> >> >> On Sat, Feb 16, 2013 at 9:02 AM, Martin Patzak (GMX) >> <martin.pat...@gmx.de> wrote: >>> >>> Hello Attila, >>> >>> what kind of USB master did you use? >>> I am using the LinkUSBi and it is working very stable for more than 3 >>> months on end (24/7). >>> >>> I did post some settings I did to the raspi to make it more stable, and >>> I can 'dig out' those old posts here, in case you can't find them. >>> >>> However things might have been changed since updates of the raspi >>> packages have been made and I do NOT upgrade, once I have found a stable >>> platform (I am running my house heating system on it, so stability is >>> key) >>> >>> Cheers, >>> >>> Martin >>> >>> >>> On 02/16/2013 08:52 AM, Attila wrote: >>> > Greetings, >>> > >>> > After several tries I found that my USB 1-wire master is not working >>> > reliable on Raspberry Pi - seems in some cases USB bus power is not >>> > enough (syslog tells this). >>> > Before going to use an externally powered USB hub, I tried to use GPIO >>> > bitbang method to drive 1-wire. >>> > I used w1 libary (w1-gpio and w1-therm), but found that OWFS cannot >>> > really work with it. >>> > I tried >>> > >>> > modprobe w1-gpio >>> > modprobe w1-therm >>> > owserver --w1 -p 4300 >>> > owhtpd -s 4300 -p 80 >>> > >>> > But when I try to connect via HTTP, RPi freezes, and I have to unplug >>> > it. >>> > Same if I use owfs instead of owhttpd, when I try to go to the mount >>> > point. >>> > >>> > In the same time I'm able to see the files what w1 mounts >>> > (/sys/bus/w1/devices) and read values without problem (But I have to >>> > say, one time it was frozen using this method as well) >>> > >>> > I upgraded kernel, packages, but no help. >>> > >>> > What can be wrong? >>> > >>> > >>> > Thanks, >>> > Attila >>> > >>> > >>> > >>> > ------------------------------------------------------------------------------ >>> > The Go Parallel Website, sponsored by Intel - in partnership with >>> > Geeknet, >>> > is your hub for all things parallel software development, from weekly >>> > thought >>> > leadership blogs to news, videos, case studies, tutorials, tech docs, >>> > whitepapers, evaluation guides, and opinion stories. Check out the most >>> > recent posts - join the conversation now. >>> > http://goparallel.sourceforge.net/ >>> > >>> > >>> > >>> > _______________________________________________ >>> > Owfs-developers mailing list >>> > Owfs-developers@lists.sourceforge.net >>> > https://lists.sourceforge.net/lists/listinfo/owfs-developers >>> >>> >>> ------------------------------------------------------------------------------ >>> The Go Parallel Website, sponsored by Intel - in partnership with >>> Geeknet, >>> is your hub for all things parallel software development, from weekly >>> thought >>> leadership blogs to news, videos, case studies, tutorials, tech docs, >>> whitepapers, evaluation guides, and opinion stories. 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Check out the most > recent posts - join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers > -- Roberto Spadim SPAEmpresarial ------------------------------------------------------------------------------ The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
