Unable to sending trigger via parallel port

Hello,

I am currently encountering an issue with sending a trigger to the parallel port using MATLAB.

I am using the following code:

ioObj = io64;
status = io64(ioObj);
address = hex2dec(‘E010’);
io64(ioObj, address, value);

However, I receive the following error message:

inpoutx64 driver is NOT open

As a result, the trigger is not being sent to the parallel port. I would greatly appreciate any guidance or advice you could provide on resolving this issue.

Thank you for your time and assistance.

Answer 1

[Walter Roberson]

io64 appears to be https://web.archive.org/web/20210903151747/http://apps.usd.edu/coglab/psyc770/IO64.html

According to https://psychtoolbox.discourse.group/t/how-to-install-use-the-io64-function/4992

"Important issue: copy the inpoutx64.dll to Windows\System32 folder and run the InstallDriver.exe with admin priviledges."

io64 was developed a number of years ago, and might not be supported under Windows 11.

[alireza]

Thanks for your sense of responsibility, but it still doesn't work. I copy the inpoutx64.dll to the Windows\System32 folder and run InstallDriver.exe with administrative permissions but it still gives me the missing error. While I have done all the steps to be an adminstrator.

Is there no other solution without io64?

[Walter Roberson]

https://psychtoolbox.discourse.group/t/sending-trigger-via-parallel-port/4595 mentions lptwrite

[Fernanda]

Hello guys.

Which version of PTB this site (https://web.archive.org/web/20210903151747/http://apps.usd.edu/coglab/psyc770/IO64.html ) works?

I´m using PTB version 3-3.0.19.14 in Windows 10, Matlab 2022b and it doesn´t work. The PTB doesn´t even open.