Tony Cappellini wrote: > > We are using PCI &PCIe Parallel Port plugin cards to control some > external hardware because newer motherboards no longer have built-in > parallel ports.
It would be a much better long term strategy to move to USB for this. There are a large number of very simple USB cards with 16 or 24 fully programmable I/O pins. The hacked up I/O port driver you're using is a huge security risk. > These plugin cards can get mapped into various address spaces when the > driver loads. Right -- in most BIOSes, the port number is derived from the PCI slot number. > In order to minimize hard-coding these addresses on each system, I > would like to find out if there is a way to get this address via > Pythonwin or Ctypes. Not easily. You can use the SetupDi APIs to enumerate through the set of parallel port devices, then use SetupDiGetDeviceInfoListDetail and CM_Get_First_Log_Conf_Ex to fetch the resource list, then a couple other CM_ APIs to crack that format and find the port number, but in my opinion it's a lot easier to ask the user to check the Device Manager resources page and type in the port number to use. If you insist, the "devcon" sample in the WDK has code that shows how to do this. > To turn the port on & off, I use this call: > ctypes.windll.inpout32.Out32(parallelPortAddress, onOff) via ctypes, > and this DLL > http://logix4u.net/Legacy_Ports/Parallel_Port/Inpout32.dll_for_Windows_98/2000/NT/XP.html That's dangerous. Any application can use that driver to gain access to any arbitrary I/O port. There's a reason why port access is not allowed from user mode. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. _______________________________________________ python-win32 mailing list python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32
