Assistance required with operation of PTB-3 USB to Serial interface with Linux

1
Hello,

My name is Alistair Perry and I am a research assistant under Dr Mark Schira at The University of NSW, Australia. I found your profile over the psychtoolbox forums and it looked like you have a similar setup to myself when running PTB. I have difficulties with the initial basic test of USB to serial interface, and any help would be great!

I have just recently installed Psychtoolbox in MATLAB (2011b), operating in Ubuntu 11.10. Ptb in general seems to work fine.

I have issues trying to get PTB to initialize Lumina Box conneted to an USB serial port, which connects to a lumina response box (LSC-400). When I call CederusResponseBox('dev/ttylUSB0',['9600'])

The script hangs in an endless loop around line 1100 trying to send some bytes to the box and waiting for a response (which does not arrive).

I don't know why this is failing, i.e. it may be the USB to serial port interface is not correctly installed - and I don't know how one could test this.

In terms of a driver, so far I have only enabled a serial (RS232) port drive (dev/ttylUSB0) on Ubuntu linux. Here is the following link for that process: http://blog.mypapit.net/2008/05/how-to-use-usb-serial-port-converter-in-ubuntu.html

Have you successfully used a USB to serial port interface with matlab and Linux?

Thanks,

Alistair Perry
2
--- In psychtoolbox@yahoogroups.com, "alistairperry123" <ap332@...> wrote:
>
> Hello,
>
> My name is Alistair Perry and I am a research assistant under Dr Mark Schira at The University of NSW, Australia. I found your profile over the psychtoolbox forums and it looked like you have a similar setup to myself when running PTB. I have difficulties with the initial basic test of USB to serial interface, and any help would be great!
>
> I have just recently installed Psychtoolbox in MATLAB (2011b), operating in Ubuntu 11.10. Ptb in general seems to work fine.
>
> I have issues trying to get PTB to initialize Lumina Box conneted to an USB serial port, which connects to a lumina response box (LSC-400). When I call CederusResponseBox('dev/ttylUSB0',['9600'])
>
> The script hangs in an endless loop around line 1100 trying to send some bytes to the box and waiting for a response (which does not arrive).
>

That command would be syntactically wrong even if it worked for your Lumina. But the CedrusResponseBox() function only supports the RB-Series of Cedrus Response boxes. "RB" by the way is a misnomer on Cedrus side: It was actually meant to be named BR, as an acronym for "Buyers Remorse".

The Lumina box is probably supported by the CMUBox() function. Search the forum, there was a message about that a few days ago.

In general usb-serial or serial response boxes are well supported on Linux ptb, but i don't have any faith in Cedrus products on any operating system.

Good luck,
-mario


> I don't know why this is failing, i.e. it may be the USB to serial port interface is not correctly installed - and I don't know how one could test this.
>
> In terms of a driver, so far I have only enabled a serial (RS232) port drive (dev/ttylUSB0) on Ubuntu linux. Here is the following link for that process: http://blog.mypapit.net/2008/05/how-to-use-usb-serial-port-converter-in-ubuntu.html
>
> Have you successfully used a USB to serial port interface with matlab and Linux?
>
> Thanks,
>
> Alistair Perry
>