This is an EPICS Channel Access client interface for Matlab. Andrei Terebilo (SLAC) is the original author. Several people provided enhancements, see release notes.
The source code is on GitHub in https://github.com/EPICSTools/mca. To download, pick a release tag like "R4-4", or "master" for the latest. Then select "Download ZIP" in the "Clone or download" drop-down.
All of the following is included in the source code, so you can refer to the one that you downloaded: