How can I read in live data to MATLAB from Arduino

I have a sketch written in Arduino to read in data from my circuit but I'm having trouble reading this data directly into MATLAB. I tried using the MATLAB Support Package for Arduino but it doesn't read the data in real time, it only reads it every 40 milliseconds and I need it to be every 10 milliseconds or less so I'll need a direct data feed. Does anyone have any ideas for a MATLAB script that will do this and possibly plot the data real time as it is coming in?

Answer 1

[Walter Roberson]

How exactly is the data being transferred? Is it being transferred by TCP/IP? Is it being transferred by an analog signal that your MATLAB session is running a data acquisition device on? Is it being transferred by a true RS232 serial port? Is it being transferred by a Virtual COM (Virtual serial port over USB) ? Is it being transferred by Zigbee?

If it is being transferred by a virtual serial port over USB then you are running into difficulties with the way that USB operates, and the problem might be difficult to fix.

[Camila Luciano]

It would be transferred by a virtual serial port over USB. The data is being read into the Arduino through an analog signal. I have been able to get this data into another program (JMP) using a serial port but it was too slow(every 20 milliseconds max) so I was hoping I could do the same thing in MATLAB, only faster. Thanks.

[Camila Luciano]

I figured it out using these files http://www.mathworks.com/matlabcentral/fileexchange/26711-interacting-with-an-arduino-using-the-matlab-serial-commands

Thank you!

[Walter Roberson]

http://www.mathworks.com/matlabcentral/newsreader/view_thread/298252

I need to verify the 40ms I mentioned there, but I need to look at something else at this time.