Stimtracker could not detect usb connection via D2XX

Hardware General
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1

Hi there,

I’ve sent an email a few days back via the cedrus website documenting the exact nature of an issue with the cedrus stimtracker. I do not have immediate access to the workstation currently, so I will try my best elaborate the problem as accurately as possible right here.

The workstation is using a linux ubuntu 18.04 setup, presenting stimulus using the latest Psychopy3 version with the pyxid2 module. I have installed the D2XX drivers via https://www.ftdichip.com/Drivers/D2XX.htm

The workstation could not detect connection to the stimtracker, producing the error (not the exact error message but something along the lines of) “D2XX: D2XX: Can’t find connection” when running the “devices = pyxid2.get_xid_devices()” command. However, running the “lsusb” command on the terminal detected the connection between the linux PC with the stimtracker, showing up as:

'Bus 003 Device 012: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC ’

I have tried various solutions online, including all steps as shown in the https://www.ftdichip.com/Drivers/D2XX.htm video, but it still doesn’t fix the issue.

A separate windows computer could connect with the stimtracker, so this is most definitely not an issue with the stimtracker.

Does anyone have any idea on how to remedy this?

2

Hello Aaron,

Cedrus does not support the Linux OS due to lack of demand. I asked a developer to look at your question and he didn’t see anything obvious. I’m sorry.

I will suggest the following tip that might help. FTDI makes two drivers: VCP (Virtual COM Port) and D2XX. On Windows, the two drivers can co-exist peacefully. However, on the Mac, they are mutually exclusive: if the VCP driver is installed, the D2XX driver will not work. As the Mac is Unix-based, perhaps it’s the same issue for your Linux computer.

If you find a solution, other forum visitors will appreciate an update from you.

– Hisham