Close All Serial Ports Matlab
Instrreset is equivalent to issuing the stopasync (if needed), fclose, and delete functions for all instrument objects. When you delete an instrument object, it becomes invalid. Because you cannot connect an invalid object to the instrument, you should remove it from the workspace with the clear command. Seriallist returns a list of all serial ports on a system. The list includes virtual serial ports provided by USB-to-serial devices and Bluetooth Serial Port Profile devices. This provides a list of the serial ports that you have access to on your computer and could use for serial port communication. Serial port name, specified as a character vector or string. The seriallist function provides a list of available serial ports. Wintv application download. You must specify the port to create a serial port object. The port name depends on the platform that the serial port is on.
This is my code:
This is the CallBack function
end
Right after the FOPEN function, I get this Warning:
The BytesAvailableFcn is being disabled. To enable the callback property either connect to the hardware with FOPEN or set the BytesAvailableFcn property.
Feb 21, 2013 But there does not seem to be an easy indication of when the serial has stopped coming through. The fgetl(s) part will wait until something actually comes through. Is there a way to time this out? Is there a better way to do this? At this point I have gone through a lot of the forums and have tried instrfindall, clearing MATLAB and running it again, I have double checked that I have the right port, and have also made sure that the alternative software does not have the port open, making it unavailable for MATLAB. Send data to Serial Port in MATLAB Its a quite simple project in which I am gonna send character over the serial port in MATLAB. In order to do so first of all, I am gonna create an object and assign it to serial port object in MATLAB.
Does the logic that happens in the callback function Serial_OnDataReceived run on a different thread?
Is there a way to pass parameters to the function? I want to modify an array in the main script from the callback function, which is in a different file. What's the best way to do so?I am also trying to plot the values when they're updated to show some kind of dynamic animation.
2 Answers
I am not sure about what is generating the warning, but to answer your other question (how to pass parameter to the callback and how to update the plot), a better way to go would be to prepare your plot outside of the callback, then pass the handle to the callback for update only.
Your callback will become:
Also note: (1) You don't need to check for the state open/close of the serial port within the callback function. If the event was triggered it means the port was open. (2) you don't need to declare s as global, the obj parameter is actually the serial object itself.
If the suggestion from Hoki does not work, try using a timer.
Then implement the timer function that will be called every period
When you want to disconnect the device and close the communication don't forget to stop the timer with
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