On Sat, Jun 27, 2009 at 6:14 AM, Zach Welch<z...@superlucidity.net> wrote: > On Fri, 2009-06-26 at 11:15 -0400, Duane Ellis wrote: >> Zach Welch wrote: >> > Only libusb+libftdi serves our long-term interests. >> > >> Wrong. >> >> "libusb" is a *blocking* issue that we cannot control, fix, nor >> whatever. LIBUSB is not supported by *newer* windows platforms. Unless >> and until it is supported it becomes a dead end solution, period, end of >> story. >> >> I believe the "WinUSB" solution is a solution, that for some reason >> keeps being left off your list. >> >> http://msdn.microsoft.com/en-us/library/aa476426.aspx > > I am not ignoring it. I remember reading on another thread that WinUSB > support has been added to libusb-win32 SVN? If that is true, than I > have covered your option in mine, but OpenOCD will use the same API.
Yes that the WinUSB backend support is in the SVN which is 22 months old. I believe that the author still wants to finish it but I do not know the timeframe. On the other hand, it may be easier to create a WinUSB backend for OpenOCD which covers the needs for OpenOCD (or libftdi) and OpenOCD (or libftdi) only. You may not need to be a Windows driver developer to do this. libusb-win32 is more generic and IMHO you really need to be a good Windows driver developer to make the WinUSB backend happen. WinUSB backend will only be one of the backend for libusb-win32. WinUSB can not replace libusb-win32. For example, it can not support Win2k and it does not support isochronous transfer. WinUSB has other limitations. Here is one interesting one. I am not sure about the implications though. The following are answers from Jan Axelson. https://www.usb.org/phpbb/viewtopic.php?t=14353&view=next " winusb.sys supports multiple handles, but the winusb.dll API supports a single open handle." https://www.usb.org/phpbb/viewtopic.php?p=47636 "I believe multiple devices are supported but not multiple handles to the same device." -- Xiaofan http://mcuee.blogspot.com _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
