From: William P. S. I. <bil...@xp...> - 2011-07-21 20:44:21
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The mini-A connects to the Tobi. The mini-B goes to the hub. Actually I checked my cable from Digikey, and the two ends are shaped differently. The mini-A end is marked with an 'A' so you can't go wrong J That should do it for you. Also there appears to be two web sites on the go: http://Gumstix.org which I believe is the original site. And http://wiki.gumstix.org/ which appears to be the newer one. Hence the confusion with my messages . Later; 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:cur...@gm...] Sent: Thursday, July 21, 2011 3:41 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port Hi Bill, Thanks for clarifying. That confirms some of what I was observing by trial and error, and answers a few more questions. One more question ... for the mini-A to mini-B adapter (required by the OTG port), which end plugs into the Tobi OTG port? The two plugs (mini-A vs. mini-B) do not appear to be plug-in compatible and my Mini-B plugin fits the Tobi side. Or is the Belkin hub you mentioned designed to plug into a mini-A style connector? Just hoping to maximize the chances that I order the right stuff the first time. :-) Thanks, Curt. On Thu, Jul 21, 2011 at 2:16 PM, William Pretty Security Inc <bil...@xp...> wrote: Ok; First of all, here is the link to the wiki I was talking about: http://gumstix.org/getting-started.html As for the USB hubs, it may not be obvious from the documentation, but they do come with their own 5V power supply (about 2 Amps!) The type of cable I mentioned with the Digikey part number, is also available from Gumstix. Delivery is just faster from Digikey. However a straight mini-B to mini-B cable WILL NOT WORK. I ordered several before I figured out what was wrong L You need a "Mini-A to Mini-B" cable. They look the same, which sucks, but one of the pins on the connector is grounded. This web site has a good explanation of the various cable types: http://www.accesscomms.com.au/Reference/USB.htm Depending on how handy with a soldering iron you are J I spliced the power connector for the Tobi and the connector for the hub together and connected them both to the same 5V 2 Amp power cube. Works like a charm . good luck; 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:cur...@gm...] Sent: Thursday, July 21, 2011 1:10 PM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Capabilities of USB OTG port On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <cur...@gm...> wrote: USB Hubs that work for me: Belkin F5U700-blk - 7 port hub Belkin F5U403-blk - 4 port hub The 7 port hub had trouble powering high power devices (Alpha WiFi adapter). Hi Bill, I appreciate your responses, but when I look up these devices I don't see any evidence that they are externally powered. Have you been able to use the USB-*OTG* port on the Tobi without an externally powered HUB? Hi Bill, ok, I do see that in one of the later pictures on the newegg site, there's a port for power and a power supply with the 4-port hub you listed. So as best as I can tell, The both USB-HOST and USB-OTG ports seem to require a hub to get them to do anything (at least with the devices I've tested.) And in addition, the USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires not just a hub, but an externally powered hub. Does this jive with other folks understanding? Thanks, Curt. -- 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 ---------------------------------------------------------------------------- -- 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 gum...@li... 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 |