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Multithreading to control several devices through matlab realtime

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Hey People
I am an experimentalist physicist and I have built an extensive set of functions in matlab to control my experiment. In general my experiment involves controlling several different equipment and I have interfaced all of them have built classes for them. All has been good so far and I am very happy about the performance. But now I need to control several of these equipment in parallel and that is where I am stuck. I searched on the web for multi-threading matlab, and I found alot of stuff about multithreaded computing in matlab. However I did not find anything where I could have several threads and pass messages between them. I appreciate any kind of hint or tips.

Answers (1)

Walter Roberson
Walter Roberson on 7 Mar 2016
The Parallel Computing Toolbox "spmd" facility is more or less that. You use labSend() and labReceive() to transfer data between workers.
AJ1 on 8 Mar 2016
Thans for reply. It is really getting close to what I am looking for. However, this code still blocks the command line and I am unable to communicate with the threads through the command line. I might be able to just use some shared variables to communicate with the threads, but still I need to access the command line. Any idea?
Walter Roberson
Walter Roberson on 12 Mar 2016
By the way, I saw some information a couple of days ago indicating that you need to feval() function handles in parallel processing rather than just call them. At the moment I do not remember the reasoning.
At the moment the only way I can think of to run asychronously and still have access to the command line is to use parfeval(), but I don't think that allows communication between workers.
The only way I can think of at the moment to do shared variables between workers is to use the File Exchange contribution "sharedmatrix" which uses operating system shared memory primitives.

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