Python Access Parallel Port

Question

Hi,

I've been trying to access the parallel port with pyParallel, which is in the same sourceforge as PySerial:

http://sourceforge.net/projects/pyserial/files/

I'm getting a WidowsError: exception: priviledged instruciton. Has anyone used this module before?

import parallel 
p = parallel.Parallel()
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python26\lib\site-packages\parallel\parallelwin32.py", line 74, in __init__
    self.ctrlReg = _pyparallel.inp(self.ctrlRegAdr)
WindowsError: exception: priviledged instruction

Answer 1

Yep -- as I pondered in my comment, it's all about better sandboxing in today's Windows versions -- there's a discussion here. There's also a possible solution here (at least up to XP, you'll need to try it if you have a newer Windows version) with a Python example here. I can't try it out since I don't have any Windows around, but I hope it can help!