On Thu, Jan 19, 2012 at 7:24 PM, Xiaofan Chen <xiaof...@gmail.com> wrote: > On Fri, Jan 20, 2012 at 12:02 AM, Peter Bigot > <pabi...@users.sourceforge.net> wrote: >> From: "Peter A. Bigot" <pabi...@users.sourceforge.net> >> >> With libusb-0.1.12-72 on openSUSE, the device bus number is encoded in the >> dirname string, not in the location value. Validate this on a system that >> uses the libusb01 backend by comparing lsusb output with: > > Is this libusb-0.1.12-72 the legacy libusb-0.1 version? Or is > it libusb-compat which is based on libusb-1.0?
I believe it is legacy; the distribution (openSUSE 10.3) is five years old. > Most the Linux distributions (other than Debian/Ubuntu) ship > with libusb-compat. It seems to me libusb-compat uses the > location field of the usb_bus structure as the bus number. > > http://git.libusb.org/?p=libusb-compat-0.1.git;a=blob;f=libusb/core.c;hb=HEAD;js=1 > 192 /* iterate over the device list, identifying the individual > busses. > 193 * we use the location field of the usb_bus structure to store > the > 194 * bus number. */ > > Maybe the behavior of the legacy libusb-0.1 is a bit different. If so, perhaps we need a way to determine which is being used. If the script I put in the commit comment actually works when "libusb01" is being used as a back-end, then there's a conflict; if it doesn't, then the fix is probably right. Is there a way to influence the selection of back end if multiple ones are available? I didn't dig into how it was done, but did notice that libusb01 was listed before libusb1 in at least one place. Peter > > -- > Xiaofan > > ------------------------------------------------------------------------------ > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
