(Topic Change) USB Hosting

From Wear-Hard Mailing list Archive (WH) Maintained by R. Paul McCarty

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    The USB Host CF Card is ok, I've seen it floating around for a while.
     I'm just not sure if I want to go down that route, it almost seems like a 'patchup job' for something that is quite standard on most computer systems nowadays.
   Aside from my odd sense of it being a 'patchup'.  I also have misgivings that:        It is only USB 1.1 - so using a Twiddler on it would be ok, but if I ever wanted to get into video input or high bandwidth applications then it would be too low.        It takes up the CF card slot - so on the Gumstix you suddenly lose the ability to augment the flash memory (leaving you with just the 4 or 16 mb of internal flash) or add additional functionallity like Wi-fi.        The price tag is reasonably high still - Last I looked it was about 140 usd, which seems a lot when the Gumstix itself is only a few hundred dollars and CF memory or Wi-fi cards are usually about 20 to 50 dollars.
      You said you have a USB Host CF Card.  It looks like it only comes with one USB port, can you use a USB hub on it and get power down the USB connections?  Also, will it allow you to use any USB device you require or is it's function limited?  I would be looking at plugging up - a Twiddler 2, a Wi-fi USB adapter, a 512mb USB Pen Drive, and maybe some sort of USB fingermouse or external trackpad.
           Ben
 >From: Jobe Bittman <> >Reply-To: Wearable Hardware Discussion List <> >To: Wearable Hardware Discussion List <> >Subject: RE: Re[2]: [Wear-Hard] Wearable Purchase Questions >Date: Wed, 10 Aug 2005 15:54:12 -0700 (PDT) > >What about the Ratoc USB 1.1 Host CF Card? I have one. >It works in Linux. I have used it on my IPaq running >Familiar Linux. > >http://www.ratocsystems.com/english/products/subpages/cfu1u.html > >--- Ben Roose <> wrote: > > >--------------------------------- > >Hi, > >     I've been watching the Gumstix website for a long >time now, thinking it would be a great base for a very >small wearable - wire a HMD directly to 
the LCD >pinouts and put something like Damn Small Linux on a >MMC or CF card.  The only problem is that Gumstix does >not have USB Hosting, and I want to put my Twiddler 2 >on it for input and control. > >       The German MiniTC/MiniPC DT166 looks great >except it's VGA out and I would need either LCD or >Composite Video.  Does anyone know if the DT166 >outputs Video on it's VGA connector? > >     If it did then you could use a VGA - Video adapter >like this Cable on eBay.  Or can you buy a wearable >VGA to Video Converter quite cheaply? > >    Thanks > >        Ben</DIV></div></html>

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