Matlab GUI

I have some question on obtain data from arduino which connect to optical encoder. I have using following code to obtain data from Arduino

        function encoder1pushbutton9_Callback(hObject, eventdata, handles)
        handles.a.pinMode(2,'input');
        handles.a.digitalRead(2)
        numberOfDatas = 200;
        data = zeros(1, numberOfDatas);
        i = 1;  
      % Main graph figure
      figure(1);
      hold on;
      title('Incomming Data from External Device');
      xlabel('Data Number');
      ylabel(' output (0-1)');
      for i=1:numberOfDatas
            % Get the data from the serial object
            data(i) = handles.a.digitalRead(2);
            % Plot the data
            figure(1);
            plot(i, data(i), 'm*');
            drawnow;
      end

Did i have to set the Baudrate, databits and stopbits to acquire data from arduino???

Answer 1

[Walter Roberson]

Everyone else that I have seen discussing the Arduino has been using the serial port to do the reading, not digital I/O. How exactly is your Arduino connected to the system you are running Matlab on?

[Tee]

I connect my arduino to 2 cytron optical encoder, digital pin 2 and digital pin 4 to signal pin at encoder

[Walter Roberson]

Perhaps this File Exchange Contribution demonstrating communications and control will help:

http://www.mathworks.com/matlabcentral/fileexchange/27843-arduino-io-package-slides-and-examples

[Tee]

Another question, the code i write only collect data ,for example 200 data,got any code can i write to know how many data transfer in 1 second?

Answer 2

[Tee]

I using digital I/O to control my motor through Matlab GUI, therefore i using digital I/O to acquire data from Arduino

[Brayan Reyes]

How was it?