git.zerfleddert.de Git - usb-driver/blob - README

   1 This library emulates Jungo Windrvr USB and parallel port functions in
   2 userspace which are required by XILINX impact to access the Platform cable USB
   3 and Parallel Cable III.
   4 With this library it is possible to access the cables without loading a
   5 proprietary kernel module which breaks with every new kernel release. It uses
   6 the functionality provided by the libusb userspace library for USB access and
   7 the kernel interface at /dev/parport0 for parallel port access instead and
   8 should work on every kernel version which is supported by libusb and supports
   9 ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with
  10 the following software:
  11
  12  * ISE Webpack 9.1SP2
  13  * ISE Webpack 9.1SP1
  14  * ISE Webpack 8.2SP3
  15  * ISE Webpack 8.1SP3
  16  * ChipScope 9.1.02i
  17  * EDK 8.2.02i
  18
  19 Build the library by calling `make'.
  20
  21 To use this library you have to preload the library before starting impact:
  22
  23 $ LD_PRELOAD=/path/to/libusb-driver.so impact
  24 or
  25 $ export LD_PRELOAD=/path/to/libusb-driver.so  (for sh shells)
  26 $ setenv LD_PRELOAD /path/to/libusb-driver.so  (for csh shells)
  27 $ impact
  28
  29
  30 Notes for the USB cable
  31 =======================
  32
  33 To use the device as an ordinary user, put the following line in a new
  34 file in /etc/udev/rules.d/ and restart udev:
  35 ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"
  36
  37
  38 If your cable does not have the ID 03fd:0008 in the output of lsusb,
  39 the initial firmware has not been loaded (loading it changes the
  40 product-ID from another value to 8). To load the firmware follow
  41 these steps:
  42
  43 1. If you have no /etc/udev/rules.d/xusbdfwu.rules file, copy it from
  44    /path/to/ISE/bin/lin/xusbdfwu.rules to /etc/udev/rules.d/xusbdfwu.rules
  45
  46 2. Install the package containing /sbin/fxload from your linux distribution.
  47    It is usually called "fxload"
  48
  49 3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex
  50
  51 4. restart udev and re-plug the cable
  52
  53
  54 Notes for the parallel cable
  55 ============================
  56
  57 To access the parallel port from userspace, the kernel needs to be built with
  58 the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware"
  59 (CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers"
  60 (CONFIG_PPDEV) builtin or as modules. If these features are built as modules,
  61 they need to be loaded before using this library.
  62 These modules are called:
  63 parport
  64 parport_pc
  65 ppdev
  66
  67
  68 To use the device as an ordinary user, put the user in the group 'lp'
  69
  70
  71 Parallel Cable IV is currently only supported in 'compatibility mode', as no
  72 attempt to configure the ECP registers is done by this library.
  73
  74
  75 If you get "Programming failed" or "DONE did not go high" when programming
  76 through the parallel cable with Impact 9.1, make sure to have the option "Use
  77 HIGHZ instead of BYPASS" enabled in Edit -> Preferences -> iMPACT Configuration
  78 Preferences.
  79 If you are using batch mode, add the following line to your cmd file:
  80 setPreference -pref UseHighz:TRUE
  81 (This problem also occurs on windows and when using the real windrvr in linux and
  82 is solved with the same workaround. Impact 8.2 is working fine with the same
  83 boards and designs)