Using Matlab on Macbook Air to send TTL to Biopac using USB to DB25 cable

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Andrew Lithen
Andrew Lithen on 31 Mar 2015
I am using Matlab on a Macbook Air and need to send TTL signals to Biopac through a DB25 connection. I have a USB to DB25 cable but I do not know how to identify the correct communication port on Mac.
In addition, I am looking for a Mac equivalent to the PC function 'lptwrite' with which I can send TTL signals. Below is the link to the lptwrite function code.
https://github.com/widmann/ppdev-mex/blob/master/lptwrite.m

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