From: Brett H. <bre...@gm...> - 2012-01-28 22:03:10
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Hello, I am playing with my robovero and just realized that the robovero itself doesnt seem to ever power the usb hub. When I connect an external pc to the mini usb jack it powers oof the pc and I can see the devices on the pc. If I disconnect the mini usb however, all the connected devices (usb wifi adapter and usb webcam) lose power. Looking at the schematic, it seems that there is some switching circuitry that should be giving the bus power when an external pc is not connected. Is this not true? I have the same behavior on both of my roboveros. Thanks, Brett |
From: Neil M. <ne...@gu...> - 2012-01-30 17:28:38
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Hi Brett, On Sat, Jan 28, 2012 at 2:03 PM, Brett Hemes <bre...@gm...> wrote: > Hello, I am playing with my robovero and just realized that the robovero > itself doesnt seem to ever power the usb hub. When I connect an external pc > to the mini usb jack it powers oof the pc and I can see the devices on the > pc. If I disconnect the mini usb however, all the connected devices (usb > wifi adapter and usb webcam) lose power. Looking at the schematic, it seems > that there is some switching circuitry that should be giving the bus power > when an external pc is not connected. Is this not true? Yes this is the expected behaviour. Do you have an Overo mounted on the RoboVero? I have used an Overo Fire + RoboVero + webcam (without the console connected) to stream video before. The camera showed up as /dev/video0 as I recall. - Neil |
From: Brett H. <bre...@gm...> - 2012-01-30 17:49:21
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Thank you Neil; After some more experimentation I found out that on the board I was using, the devices show up if I use the USB A port in the middle of the board but not on the port located near the edge. I have yet to try my other robovero to see if the behavior is the same. On the good port (center one) my webcam shows up as /dev/video0. Thanks, Brett On Mon, Jan 30, 2012 at 11:28 AM, Neil MacMunn <ne...@gu...> wrote: > Hi Brett, > > On Sat, Jan 28, 2012 at 2:03 PM, Brett Hemes <bre...@gm...> > wrote: > > Hello, I am playing with my robovero and just realized that the robovero > > itself doesnt seem to ever power the usb hub. When I connect an > external pc > > to the mini usb jack it powers oof the pc and I can see the devices on > the > > pc. If I disconnect the mini usb however, all the connected devices (usb > > wifi adapter and usb webcam) lose power. Looking at the schematic, it > seems > > that there is some switching circuitry that should be giving the bus > power > > when an external pc is not connected. Is this not true? > > Yes this is the expected behaviour. Do you have an Overo mounted on > the RoboVero? I have used an Overo Fire + RoboVero + webcam (without > the console connected) to stream video before. The camera showed up as > /dev/video0 as I recall. > > - > Neil > > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |