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++ When using XILINX JTAG software like Impact, Chipscope and XMD + on Linux, the proprietary kernel windrvr module from Jungo + is needed to access the parallel- or usb-cable. + As this module does not work with current linux kernel versions (> 2.6.18) a library was developed, + which emulates the module in userspace and allows the tools to access the JTAG cable without the need + for a proprietary kernel module. +
++ The library uses libusb to access USB devices and the + ppdev interface to communicate + with parallel cables. The parallel part currently only supports Parallel Cable III mode (and PCIV in + PCIII compatibility mode) as the faster PCIV modes use another kernel module which is not emulated by + this library. So you are limited to a 200kHz JTAG clock when using Parallel Cable IV with this software. + The USB cable is supported at full speed. +
++ The library is called libusb-driver as it was developed to support the USB cable, but later + extended to also support parallel cables. +
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