Re: [Gumstix-users] USB Blues

[Andy M. <ja...@sm...>]

there must be a fix somehow to the message 

Rejected 1 configuration due to insufficient bus power

I have a telit modem that if I connect directly to the OTG port I see a
message like that above,
however if I stick and unpowered hub in the way, it connects fine. So I
am drawing even more current and it works!

I came across this in the .config for my kernel, will try setting it
higher and see what happens
CONFIG_USB_GADGET_VBUS_DRAW=500


-----Original Message-----
From: David Brain [mailto:da...@sm...] 
Sent: 19 May 2011 15:45
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] USB Blues

Steve

Thanks. Looks like I'm screwed .  Will have to look for another board,
as I can't use a hub.  Pity this is isn't made clear on the web site...

David.

At 15:24 19/05/2011, you wrote:
>Host port won't do 12Mb/sec mode (I learned the hard way).  So you'll 
>need to put a hub in there if your device is Full speed only.
>
>OTG port will do full speed but can only drive 100mA, so you'll need a 
>powered hub if your device needs more than that.
>
>The host port chip could perhaps be made to support full speed mode.  
>There is documentation in the chip manual on this, but it appears it's 
>not implemented on these boards.  It's the exact same way on the beagle

>board.
>
>Steve
>
>On May 19, 2011, at 9:09 AM, David Brain wrote:
>
> > Hi
> >
> > I'm trying to use the Gumstix Overo with an Anolog Devices metering 
> > evaluation board which uses a standard usbserial interface.
> >
> > I've tested this with a couple of Ubuntu boxes and also with Windows

> > XP and it works fine.
> >
> > On ubuntu I use modprobe to assign usbserial :
> >
> > modprobe usbserial vendor= 0x456 product= 0x7040  This then creates 
> > a
> > ttyUSB0 port which I can talk to.
> >
> > On Overo I firstly tried the USB host port  - This does not appear 
> > to do anything.
> >
> > I then tried the USBOTG interface this seems to correctly detect the

> > device and displays its vendor and product id correctly.
> >
> > But it prints the message:
> >
> > Rejected 1 configuration due to insufficient bus power.
> >
> > I tried the usual modprobe command which was accepted but replugging

> > did not select the correct usb serial driver.  Neither was a ttyUSB0

> > driver created in /dev
> >
> > Can anyone suggest how I can make either of these two ports work
correctly?
> >
> > David
> >
> >
> >
> >
> >
> > 
> ----------------------------------------------------------------------
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>--
>Steve Modica
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>www.small-tree.com
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>mobile: 651-261-3201
>
>
>
>
>
>
>
>-----------------------------------------------------------------------
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>Read this article and learn how Intel has extended the reach of its 
>next-generation tools to help Windows* and Linux* C/C++ and Fortran 
>developers boost performance applications - including clusters.
>http://p.sf.net/sfu/intel-dev2devmay
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------------------------------------------------------------------------
------
What Every C/C++ and Fortran developer Should Know!
Read this article and learn how Intel has extended the reach of its
next-generation tools to help Windows* and Linux* C/C++ and Fortran
developers boost performance applications - including clusters. 
http://p.sf.net/sfu/intel-dev2devmay
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