[open] usb to parallel port
Dear Opensesame developers and python experts
Does anyone now how to use a usb to paralel port device for sending triggers under python with Opensesame. Unfortunately, the pyserial and the pyparellel do not support USB paralel port devices.
See http://pyserial.sourceforge.net/pyparallel.html
Best
Tas
Comments
Hi Tas,
My guess is that the USB-to-parallel port will not work any differently from a regular parallel port, in which case you could simply follow the instructions here: http://osdoc.cogsci.nl/miscellaneous/sending-triggers-eegerp
Good luck!
Cheers,
Sebastiaan
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Dear Sebastiaan
As also mentioned on the website of pyserial, I think the problem is the port io number the usb to LPT device. As it is a printer port emulator I can not find a port number as required in the given python script ( e.g. port = 0x378)
Best
Tas
Indeed, it states:
But ... this refers to pyparallel / giveio, and perhaps the same restriction does not apply dlportio.dll and/ or inpout32.dll (although it may, of course). Unfortunately, I don't know of anyone who has tried to interface with a USB-to-parallel device, so you are more-or-less on your own here. Perhaps Google has something to say about USB + dlportio.dll or USB + inpout32.dll?
If you manage to resolve this issue, I would love to know so we can add this to the documentation. I imagine more and more people will starting using USB-emulated ports. (Although I honestly don't understand why the parallel port is still used at all, emulated or no. It's nothing but trouble.)
Good luck!
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Hi,
I'd like also to go through the USB. If you find a solution, please share !
I manage to obtain a trigger using an old computer with a parallel port. I use the parallel_port_trigger plug-in.
But I had a problem. Everything was running but I wasn't seeing the trig. After some extensive search, I found a small soft called LPTTestUtility. It allows to see the LPT and to try to reach it. I discovered that the address of the port was not good. Instead of 0x378, my port was at 0x3BC.
Perhaps you have a similar problem.
http://lpt-port-test-utility.software.informer.com/