Re: [Gumstix-users] USB OTG port not supplying enough power ? Or am I using the wrong cable ?

[Lou M. <lmo...@gm...>]

Hi Bill,

I'm using a mini A to standard A adapter.  I believe the overo is not
supplying enough current.

On Fri, Apr 20, 2012 at 1:39 PM, William Pretty Security <
bil...@xp...> wrote:

> If I understand you correctly. Here is what you should do.****
>
> ** **
>
> **1)      **Plug the mini B end into the USB-OTG connector. (It has the
> ID pin grounded.)****
>
> **2)      **Use a mini A to standard A adapter to plug into your radio.***
> *
>
> ** **
>
> It is the grounded ID pin of the mini B connector that tells the USB-OTG
> port to act like a host.****
>
> ** **
>
> Good luck;****
>
> ** **
>
> Bill****
>
> ** **
>
> ** **
>
> *From:* Lou Morda [mailto:lmo...@gm...]
> *Sent:* Friday, April 20, 2012 12:42 PM
> *To:* General mailing list for gumstix users.
> *Subject:* Re: [Gumstix-users] USB OTG port not supplying enough power ?
> Or am I using the wrong cable ?****
>
> ** **
>
> So now I have a mini A to standard A adapter, where the mini A is plugged
> into my USB OTG port and the standard A is plugged into my radio
> peripheral.  This isn't working either.  The problem is that my radio
> peripheral has a standard A cable that I'm trying to plug into the USB OTG
> port.  Do I need a mini A to mini B cable, and then use a mini B to
> standard A adapter?  In other words do I need a mini A to mini B cable to
> fake a mini A to mini B connection, and then use an adapter on the mini B
> plug so that I can plug in my standard A cable?****
>
> On Thu, Apr 19, 2012 at 12:01 PM, Bob Feretich <
> bob...@ra...> wrote:****
>
> I am confused regarding your cable set up.
> >  ...  The usb device is a
> >  radio. ...
> >  Third, according to the above post, I'm not using the correct cable.
>  I've
> >  got a Standard A USB 2.0 cable coming from the radio, and I've connected
> >  that to the USB OTG port with a mini B adapter. Fourth, the connection
> >  works every single time if I put a powered usb hub in between the USB
> OTG
> >  and the raido.
>
> It seems like you have "B" connectors at both ends of the cable.
> Since the radio is the "device" if should accept a "B" style connector.
> But then your Overo is the Host and needs an "A" style connector.
> To act as a Host (and supply power), the OTG port needs a Mini-A or a
> Micro-A
> depending on the Expansion board.
> The above states that your using a Mini-"B" on the OTG end of the cable.
> Unless you modify the Expansion board or the connector, that won't work.
>
> "How to modify the OTG board connector" to act as a host with a Mini-B
> plugged in and
> "How to modify a Mini-B connector to become a Mini-A" were topics
> discussed on
> a BeagleBoard forum a couple years ago.
>
> Regards,
> Bob
>
>
>
> ------------------------------------------------------------------------------
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>
>
>
> --
> -Louis Morda****
>
>  SAIC Computer Scientist****
>
>  lmo...@gm...****
>
> ** **
>
>
> ------------------------------------------------------------------------------
> For Developers, A Lot Can Happen In A Second.
> Boundary is the first to Know...and Tell You.
> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE!
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>


-- 
-Louis Morda
 SAIC Computer Scientist
 lmo...@gm...