Create listener / Interrupt to detect new CAN message

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Gerd
Gerd 2011-6-6
Hi all,
I am writing some routines to interface my PEAK Systems CAN USB Dongle. I managed to get it all working (send and receive) but to have a nice application I would like to know if it is possible to create a listener in Matlab. Background is I have a function Read() which is == 0 when a new message is available. I would like to detect this state in a "background" task to display the new message when the message is available. Cheers Gerd

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回答（2 个）

Chirag Gupta
Chirag Gupta 2011-6-6
The CAN interface itself provides for MessageReceivedFcnCount and MessageReceivedFcn properties that can used to execute a call back whenever messages are available
There are multiple ways of creating listeners. One of the methods is if you are using MATLAB Classes and Objects, then you can define events and listeners.
Another way is to just poll in the background using timers.
Gerd
Gerd 2011-6-6
Hi Chirag,
thank you for your answer. The functions you described MessageReceivedFcnCount and MessageReceivedFcn are from the Vehicle Network toolbox. Unfortunally this toolbox doesn't support my Hardware(PeakSystem CAN Dongle). So these functions are not available so far.
I am not using OOP in Matlab so I think I have to find my way using timers. Is there no other possiblility?

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