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Message-ID: | <4302A9EC.4040502@ateb.com> |
Date: | Tue, 16 Aug 2005 23:07:24 -0400 |
From: | Reid Thompson <reid DOT thompson AT ateb DOT com> |
User-Agent: | Mozilla Thunderbird 1.0.6 (Windows/20050716) |
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To: | "Gary R. Van Sickle" <g DOT r DOT vansickle AT worldnet DOT att DOT net> |
Cc: | cygwin AT cygwin DOT com |
Subject: | Re: OT: Krazy USB Kameras (RE: Programatically finding value of "cygdrive" prefix) |
References: | <SR002-2KEXCabigPasS00000e35 AT sr002-2kexc DOT ateb DOT com> |
In-Reply-To: | <SR002-2KEXCabigPasS00000e35@sr002-2kexc.ateb.com> |
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Gary R. Van Sickle wrote: >[snip] > > >>NOTE: A digital camera shows up as an USB drive, i.e. a DOS >>drive -> e.g. /cygdrive/<next free letter> - and is available >>so long as the camera stays ON (it eventually WILL go OFF >>after last use, just as your screen blanker! Depending on how >>you've set it or use it.) >> >> >> > >A USB Mass Storage Device that does this is poorly designed at best, and >probably not compliant with the USB specification. I can't recall a >situation where a device is allowed to just "disappear" once plugged in and >enumerated without the user doing something (a bus-powered device anyway). >You should see if there is a firmware upgrade available for it. > >Then again, I know firsthand that Microsoft had USB Mass Storage pretty >wildly wrong as late as the release of XP SP...2 I think, maybe 1, so who >knows, could be MS's fault. > > > Most cameras have an auto-off function to preserve battery power. I do not think any of them are actually usb powered when plugged in. I know that mine will NOT function without charged batteries in it even when plugged into a port. I suppose that if a camera has the means to turn off the auto-shutoff function then it will not disappear until the batteries fail, whereupon it will act like any other externally powered USB device and become unaccessable. I believe that some cameras come with an external power adapter that will provide continuous power. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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