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 9.1SP3
  13  * ISE Webpack 9.1SP2
  14  * ISE Webpack 9.1SP1
  15  * ISE Webpack 8.2SP3
  16  * ISE Webpack 8.1SP3
  17  * ChipScope 9.1.03i
  18  * ChipScope 9.1.02i
  19  * ChipScope 8.2.04i
  20  * EDK 8.2.02i
  21
  22 Build the library by calling `make'.
  23
  24 To use this library you have to preload the library before starting impact:
  25
  26 $ LD_PRELOAD=/path/to/libusb-driver.so impact
  27 or
  28 $ export LD_PRELOAD=/path/to/libusb-driver.so  (for sh shells)
  29 $ setenv LD_PRELOAD /path/to/libusb-driver.so  (for csh shells)
  30 $ impact
  31
  32 The source for this library can be found at:
  33 http://cvs.zerfleddert.de/cgi-bin/viewcvs.cgi/usb-driver/
  34
  35
  36 Notes for the USB cable
  37 =======================
  38
  39 To use the device as an ordinary user, put the following line in a new
  40 file in /etc/udev/rules.d/ and restart udev:
  41 ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"
  42
  43
  44 If your cable does not have the ID 03fd:0008 in the output of lsusb,
  45 the initial firmware has not been loaded (loading it changes the
  46 product-ID from another value to 8). To load the firmware follow
  47 these steps:
  48
  49 1. If you have no /etc/udev/rules.d/xusbdfwu.rules file, copy it from
  50    /path/to/ISE/bin/lin/xusbdfwu.rules to /etc/udev/rules.d/xusbdfwu.rules
  51
  52 2. Install the package containing /sbin/fxload from your linux distribution.
  53    It is usually called "fxload"
  54
  55 3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex
  56
  57 4. restart udev and re-plug the cable
  58
  59
  60 Notes for the parallel cable
  61 ============================
  62
  63 To access the parallel port from userspace, the kernel needs to be built with
  64 the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware"
  65 (CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers"
  66 (CONFIG_PPDEV) builtin or as modules. If these features are built as modules,
  67 they need to be loaded before using this library.
  68 These modules are called:
  69 parport
  70 parport_pc
  71 ppdev
  72
  73
  74 To use the device as an ordinary user, put the user in the group 'lp'
  75
  76
  77 If you have an almost compatible cable which works with other software but not
  78 with Impact, try adding -DFORCE_PC3_IDENT to the CFLAGS line in the Makefile.
  79 This enables a hack by Stefan Ziegenbalg to force detection of a parallel cable.
  80
  81
  82 Parallel Cable IV is currently only supported in 'compatibility mode', as no
  83 attempt to configure the ECP registers is done by this library.
  84
  85
  86 If you get "Programming failed" or "DONE did not go high" when programming
  87 through the parallel cable with Impact 9.1, make sure to have the option "Use
  88 HIGHZ instead of BYPASS" enabled in Edit -> Preferences -> iMPACT Configuration
  89 Preferences.
  90 If you are using batch mode, add the following line to your cmd file:
  91 setPreference -pref UseHighz:TRUE
  92 (This problem also occurs on windows and when using the real windrvr in linux and
  93 is solved with the same workaround. Impact 8.2 is working fine with the same
  94 boards and designs)