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Libusb needs exclusive access to device?Hey!
we're currently planing to give a device a few new features and therefore we need to know whether two different libusb programs can connect to the same USB-device. If not (what i expect ) our way would be to make a composite device, which would be splitted by the usbccgpd to 2 devices on the pc, so the pc-software could connect to each of the device. That's possible, isn't it? ;) Thanks, Kai ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Libusb-devel mailing list Libusb-devel@... https://lists.sourceforge.net/lists/listinfo/libusb-devel |
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Re: Libusb needs exclusive access to device?On Thu, 5 Nov 2009, Kai Parow-Souchon wrote:
> Hey! > > we're currently planing to give a device a few new features and > therefore we need to know whether two different libusb programs can > connect to the same USB-device. Yes, they can (under Linux anyway). But the two programs cannot communicate with endpoints in the same interface; each program has to claim the interface it will use. > If not (what i expect ) our way would be to make a composite device, > which would be splitted by the usbccgpd to 2 devices on the pc, so the > pc-software could connect to each of the device. > That's possible, isn't it? ;) I've never heard of usbccgpd before, but it does sound possible. Alan Stern ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Libusb-devel mailing list Libusb-devel@... https://lists.sourceforge.net/lists/listinfo/libusb-devel |
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Re: Libusb needs exclusive access to device?Alan Stern wrote:
> On Thu, 5 Nov 2009, Kai Parow-Souchon wrote: > >> If not (what i expect ) our way would be to make a composite device, >> which would be splitted by the usbccgpd to 2 devices on the pc, so the >> pc-software could connect to each of the device. >> That's possible, isn't it? ;) >> > > I've never heard of usbccgpd before, but it does sound possible. > Usbccgp.sys is the Windows generic driver for USB composite devices, if you don't handle the composite yourself. It makes the interfaces look like separate devices so they can be handled by independent drivers. CCGP stands for "Common Class Generic Parent", -- Tim Roberts, timr@... Providenza & Boekelheide, Inc. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Libusb-devel mailing list Libusb-devel@... https://lists.sourceforge.net/lists/listinfo/libusb-devel |
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