This library emulates Jungo Windrvr USB and parallel port functions in userspace which are required by XILINX impact to access the Platform cable USB and Parallel Cable III. With this library it is possible to access the cables without loading a proprietary kernel module which breaks with every new kernel release. It uses the functionality provided by the libusb userspace library for USB access and the kernel interface at /dev/parport0 for parallel port access instead and should work on every kernel version which is supported by libusb and supports ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with the following software: * ISE Webpack 9.1SP3 * ISE Webpack 9.1SP2 * ISE Webpack 9.1SP1 * ISE Webpack 8.2SP3 * ISE Webpack 8.1SP3 * ChipScope 9.1.02i * EDK 8.2.02i Build the library by calling `make'. To use this library you have to preload the library before starting impact: $ LD_PRELOAD=/path/to/libusb-driver.so impact or $ export LD_PRELOAD=/path/to/libusb-driver.so (for sh shells) $ setenv LD_PRELOAD /path/to/libusb-driver.so (for csh shells) $ impact The source for this library can be found at: http://cvs.zerfleddert.de/cgi-bin/viewcvs.cgi/usb-driver/ Notes for the USB cable ======================= To use the device as an ordinary user, put the following line in a new file in /etc/udev/rules.d/ and restart udev: ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666" If your cable does not have the ID 03fd:0008 in the output of lsusb, the initial firmware has not been loaded (loading it changes the product-ID from another value to 8). To load the firmware follow these steps: 1. If you have no /etc/udev/rules.d/xusbdfwu.rules file, copy it from /path/to/ISE/bin/lin/xusbdfwu.rules to /etc/udev/rules.d/xusbdfwu.rules 2. Install the package containing /sbin/fxload from your linux distribution. It is usually called "fxload" 3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex 4. restart udev and re-plug the cable Notes for the parallel cable ============================ To access the parallel port from userspace, the kernel needs to be built with the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware" (CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers" (CONFIG_PPDEV) builtin or as modules. If these features are built as modules, they need to be loaded before using this library. These modules are called: parport parport_pc ppdev To use the device as an ordinary user, put the user in the group 'lp' If you have an almost compatible cable which works with other software but not with Impact, try preloading libusb-driver-trenz.so instead of libusb-driver.so. It includes a hack by Stefan Ziegenbalg to force detection of a parallel cable. Parallel Cable IV is currently only supported in 'compatibility mode', as no attempt to configure the ECP registers is done by this library. If you get "Programming failed" or "DONE did not go high" when programming through the parallel cable with Impact 9.1, make sure to have the option "Use HIGHZ instead of BYPASS" enabled in Edit -> Preferences -> iMPACT Configuration Preferences. If you are using batch mode, add the following line to your cmd file: setPreference -pref UseHighz:TRUE (This problem also occurs on windows and when using the real windrvr in linux and is solved with the same workaround. Impact 8.2 is working fine with the same boards and designs)