Date: Fri, 15 May 2009 21:19:07 +0200 From: Thierry Herbelot <thierry.herbelot@free.fr> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-usb@freebsd.org Subject: Re: Asynchronous bulk transfers in usb2 ? Message-ID: <200905152119.07569.thierry.herbelot@free.fr> In-Reply-To: <200905152106.48104.hselasky@c2i.net> References: <200905151857.21361.thierry.herbelot@free.fr> <200905152106.48104.hselasky@c2i.net>
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Le Friday 15 May 2009, Hans Petter Selasky a écrit : > On Friday 15 May 2009, Thierry Herbelot wrote: > > Hello, > > > > This is a follow-on for : > > http://www.mail-archive.com/freebsd-usb%40freebsd.org/msg04000.html, > > where a code snippet was posted to use the new USB stack. > > > > I've just recompiled my old experiment (which used to work at the time), > > and it does not seem to work with today's current (I made the cosmetic > > changes due to the change of name for the libusb, so the compile at least > > is OK). > > > > the issue is that the following loop (copied from the previous archived > > post) is never executed : > > -------------------- > > while ( ( pdev = libusb20_be_device_foreach ( pbe, pdev ) ) ) > > { > > ddesc = libusb20_dev_get_device_desc ( pdev ); > > printf("vendor %x prod %x\n", ddesc->idVendor, ddesc->idProduct); > > > > /* stop with the first found device */ > > if ( ddesc->idVendor == MY_VENDOR_ID ) > > { > > libusb20_be_dequeue_device ( pbe, pdev ); > > break; > > } > > } > > -------------------- > > > > pdev is always NULL at the end of the loop (even though a USB device has > > been plugged, has been detected by the USB stack and is correctly seen, > > as per usbconfig, with the expected idVendor). > > > > I have not followed the recent developments on the USB stack : maybe some > > change is needed in my code ? > > Check permissions for devices under /dev/usb *blush* (this is indeed the reason) but .... this used to work ;-) (maybe it did no longer work after the device nodes were added for the USB devices) what is the recommended way to change the permissions for the usb device nodes ? (with devd ?) in the meantime, I'll try to run from root ... Thanks TfH > > --HPS
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