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Old 05-08-2005, 01:18 PM
Jason Wu
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Default Parallel Cable IV operating in "Compatibility Mode" under linux kernel 2.6.x

hi all

we following the steps from
http://www.fpga-faq.org/FAQ_Pages/00...l_on_Linux.htm
and install the parallel cable driver under linux kernel 2.6.10 (suse
9.3 pro)
Impact was not able to find xpc4drvr module thus parallel cable IV has
been set to compatibility mode. following message is from "make
download" in command mode

AutoDetecting cable. Please wait.
Connecting to cable (Parallel Port - parport0).
WinDriver v7.00 Jungo (c) 1997 - 2005 Build Date: Apr 26 2005 X86
11:07:13.
parport0: baseAddress=0x378, ecpAddress=0x778
LPT base address = 0378h.
ECP base address = 0778h.
ECP hardware is detected.
Cable connection established.
Connecting to cable (Parallel Port - parport0) in ECP mode.
Module xpc4drvr is not loaded.
Cable connection failed.
Connecting to cable (Parallel Port - parport0).
WinDriver v7.00 Jungo (c) 1997 - 2005 Build Date: Apr 26 2005 X86
11:07:13.
LPT base address = 0378h.
ECP base address = 0778h.
Cable connection established.
ECP port test failed. Using download cable in compatibility mode.

from the message the cable is operating in compatibility mode because
"xpc4drvr" is not loaded. When i check the module list, the "xpc4drv"
is loaded (instead of "xpc4drvr").

The kernel message shows the following message when xpc4drvr is loaded.

xpc4drv: unsupported module, tainting kernel.
xpc4drvr: init_module

Anyone has a solution to this?

The only certain thing is that it is about 10X slower than high speed
mode. This become very annoying when trying downloading a big bitfile.

thank you

Jason

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Old 05-08-2005, 11:44 PM
Ben Twijnstra
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Default Re: Parallel Cable IV operating in "Compatibility Mode" under linux kernel 2.6.x

Hi Jason,

At least Altera's download cables are supported by the standard ppdev
interface. Even the USB-based cables will be supported under Linux in the
near future.

Best regards,




Ben

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