OK;

 

Here is what I think is happening:

 

You are using the wrong mini-USB cable L That confused me at first …

You need the mini-A to mini-B cable I gave the part number for.

 

This is a “special” cable that tells the OTG port to switch modes. The hubs I suggested have mini-USB input ports on them.

That is how you connect keyboards and what not to the Overo (Per the WiKI). The hub should have EXTERNAL power. (per the WiKI)

 

As far as I know you should be able to just connect your USB-A to Mini-B cable from the Tobi Console connector to your PC

and it should just work. Windows and Linux will install a ‘virtual’ serial port. Linux will call it “TTYx” or something. It depends on you

flavor of Linux. My windows Xp system wanted a special driver. I can tell you where to down load it …

If the Tobi isn’t detected by the Operating system, just unplug the USB connector and plug it in again.

 

You realize that you need the “Desktop Image” to use the keyboard, mouse, etc connected to the hub. The Overo ships

with a “Console” image. Which uses the Console USB port on the Overo.

 

Hope this helps …

 

Bill

 

"People sleep peaceably in their beds at night only because rough men

stand ready to do violence on their behalf." - George Orwell

 

From: Curtis Olson [mailto:curtolson@gmail.com]
Sent: Thursday, July 21, 2011 11:03 AM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] Capabilities of USB OTG port

 

I've heard a bit of conflicting information here.  Now I'm more confused than when I started. :-)


Let me try asking a different way...

 

 

When I plug the usb->serial converter directly into the usb "HOST" port it doesn't seem to be detected.

 

When I plug the 4-port hub into the USB-HOST port, the hub is detected and the hub's little red LED is illuminated.  When I plug the usb->serial converter into the hub, then it is detected.  Life seems relatively good, except I can't plug the device in directly, it only seems to work with the hub in the middle.

 

 

When I plug my usb->serial converter into the USB-OTG host (via my A to mini-B converter) the pl2303 serial converter device isn't detected (just like when I plugged it directly into the HOST port.)


When I plug my 4-port hub into the USB-OTG port it isn't auto detected, but when I reboot it seems to be detected (I see entries in "dmesg" about detecting a hub.)  *HOWEVER* the little red LED on the hub is not illuminated.  When I plug my usb->serial converter into the HUB which is plugged into the USB-OTG port, it is *not* detected.

 

-----------------------------------------

 

So to summarize my observations:


I can get my device to work in the USB-HOST port *iff* I use a 4-port hub in between (and the hub's led illuminates when connected to the "HOST" port.)

 

I cannot get my device to work in the USB-OTG port -- neither with or without a 4-port hub in between.  In addition the LED on the 4-port hub does not illuminate when connected to the OTG port, even though it appears (dmesg) that the hub is being detected.

 

The plug-n-play USB stuff does not appear to be reliable (?) sometimes it seems like I need to do a reboot before devices are detected.

 

-------------------------------------------

 

My questions are then:

 

Is this expected behavior?

 

What am I missing with the USB-OTG port that I cannot get it to work on my Tobi?  Does the HUB need separate 5v power that OTG port is not providing?  Is it something else?

 

Is this just an extra appendage on the Tobi that nobody uses and nobody knows what it's for???

 

Thanks!

 

Curt.

 

 

On Thu, Jul 21, 2011 at 9:23 AM, William Pretty Security Inc <bill.pretty@xplornet.com> wrote:

According to the Old Wiki, you could not hook USB 1 devices to the OTG port
...
That's why they suggested the hub ...

Can somebody from Gumstix confirm this ? Has the spec changed ??



"People sleep peaceably in their beds at night only because rough men
stand ready to do violence on their behalf." - George Orwell

-----Original Message-----
From: Francesco Marletta [mailto:francesco.marletta@movia.biz]
Sent: Thursday, July 21, 2011 6:01 AM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] Capabilities of USB OTG port

2011/7/19 William Pretty Security Inc <bill.pretty@xplornet.com>:
>
> Basically most devices like keyboards and mice are USB-1 devices. The OTG
> port is USB-2 only.
>
> So you need the hub as a translator. There used to be a bunch of
information
> on the wiki

This isn't true. The OTG port is USB2 but can handle USB1 devices
without hubs, in USB terms it's a USB2 port capable of working in HS
(High Speed, 480Mbps), FS (Full Speed, 12Mbps) and LS (Low Speed,
don't remeber the value) mode.

The other USB port instead is USB2 HS **only**, so you need an hub to
connect USB1 devices.

Regards


--
Francesco Marletta
Development Manager

Mobile: +39.3317332107
Email: francesco.marletta@movia.biz

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------------------------------------------------------------------------------
5 Ways to Improve & Secure Unified Communications
Unified Communications promises greater efficiencies for business. UC can
improve internal communications as well as offer faster, more efficient ways
to interact with customers and streamline customer service. Learn more!
http://www.accelacomm.com/jaw/sfnl/114/51426253/
_______________________________________________
gumstix-users mailing list
gumstix-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/gumstix-users




--

Curtis Olson:

http://www.atiak.com - http://aem.umn.edu/~uav/

http://www.flightgear.org - http://gallinazo.flightgear.org

 


No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1390 / Virus Database: 1518/3778 - Release Date: 07/21/11