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