Re: PPMC developments

[Jon Elson <jmelson-at-artsci.wustl.edu>]

Hello, all,

I worked a bit this weekend on getting a computer set up to test
the parallel port motion control with EMC.  I got a computer
that had been running stock Red Hat Linux 5.2 and moved a
copy of my RTLinux kernel over, and after many false starts,
I got it running, with the kernel modules, rt fifos, and everything
in place and working.  Then I had to get EMC to compile, so
it took some fishing around to get all the include files and
libraries in place.

So, now EMC comes up on the system, but I can't get out of
estop (sound familiar?)  I have a .ini file that works perfectly
on the real EMC system with the Servo-to-Go card in it.
Now, as I understand it, the sensing of estop is through the
parallel port, not the STG card.  So, it seems like it should
come out of estop without the STG card.  But, maybe there
is additional logic in there that senses the STG card is missing,
and forces it to stay e-stopped.

So, I tried some of the default versions, like emc.run but had
the same problem.  I tried various combinations of estop_sense_polarity
and the parallel port addresses.  Does anyone have a .ini file
that will allow EMC to work in RT mode with only one
parallel port, or have any suggestions on how to get it going?

Once I get past there, I then need to substitute my encoder and
DAC routines for the STG versions and try to get it to run!

Jon