parallel port

HI, anybody knows if is possible to use two parallel ports with a emc2, one will be used to control step motors and another will be used as I/O by classic ladder?

Hi Andradela

Here some text snipes I copied in to a file that I hope to find it next time .

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Error when starting EMC:

insmod: error inserting '/home/jepler/src/emc2/rtlib/hal_parport.ko': -1 Device or resource busy

If you encounter this problem, you must make sure that the Linux kernel module parport_pc is not loaded at boot time.
On Ubuntu systems, you can do this by creating a file in /etc/modprobe.d/ with the one line

install parport_pc /bin/true

The EMC2 packages put this line in the file /etc/modprobe.d/emc2.



EMC appears to start, but no signals ever appear on the parallel port (the motors don't turn).
Add the following command before the line loading hal_parport in your hal file.

loadrt probe_parport

The Linux parallel port driver must be completely disabled for EMC's hal_parport driver to load.
However, as we learned after the release of 2.0.1, this disabled certain parallel ports that are "PNP" (plug and play) devices.
The new probe_parport realtime module performs the probing for one type of PNP port.

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Mike