Re: OT: Krazy USB Kameras (RE: Programatically finding value of cygdrive prefix)
On Tue, 2005-08-16 at 20:41 -0500, 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. Poorly designed or not, that is the way a Minolta Dimage Z1 behaves, at least mine does - with my current settings. As this a year++ old device I really see it as out of date and not prone to have FW upgrades available. OTOH, I find it more alarming as the situation creates fs problems, which actually happens when Windows is involved. (I have yet to see this problem on Linux) NOTE: I ALWAYS run it on batteries. (One round of batteries lasts all from two weeks to 3 hours - depending on how intensely I use it. A three hour sojourn gives me a full CD of images at least.) 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. Might be so, wouldn't be a big surprise - I run this camera against 2k, XP and Linux (cygwin involved on Wins). OT - END of THREAD. /Hannu E K Nevalainen -- 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/
OT: Krazy USB Kameras (RE: Programatically finding value of cygdrive prefix)
[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. -- Gary R. Van Sickle -- 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/
Re: OT: Krazy USB Kameras (RE: Programatically finding value of cygdrive prefix)
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/
