Serial Port as a property of an object of a class

Hi,

I have created a serial port as a property to an object. In the program I assigned the BytesAvailableFcn property of the serial port to a callback function. However whenever I execute the code it gives an error " Undefined function 'acquireSamples' for input arguments of type 'serial'." Can anyone please help me regarding this issue ? I'm attaching the code.

    classdef max10Display <max10lia.Max10LIAClass
       properties
         serialPort;
       end
       methods
         function obj = max10Display(varargin)
            obj.serialPort = serial('COM3');
      obj.serialPort.BaudRate = 115200;
         end
          function getStarted(obj)

            obj.serialPort = serial('COM3');
      obj.serialPort.BaudRate = 115200;
            size_data = 1000;
      obj.serialPort.BytesAvailableFcn = {@acquireSamples size_data};
      obj.serialPort.BytesAvailableFcnCount = size_data;
      obj.serialPort.InputBufferSize = 30000;
      obj.serialPort.BytesAvailableFcnMode = 'byte';
            numSamples = obj.everyNSamples;
            comma = ' ';
            numSamples = ['N_Sample',comma,num2str(numSamples)];
            fopen(obj.serialPort);
            fprintf(obj.serialPort, numSamples);

        end
        function acquireSamples(obj,~,chunk)
          ........
          ........
        end
      end 
    end

Answer 1

[Walter Roberson]

You made acquireSamples a non-static method of your class, so it expects an object of your class max10Display as the first parameter. But you are using a standard serial port BytesAvailableFcn callback, and for that the first parameter passed is the serial port object.

[Swarnava Pramanik]

Hi Walter,

Thanks for your prompt response. I don't want to make the "acquireSamples" method as a static method so is there any other way?

Thanks

[Walter Roberson]

   obj.serialPort.BytesAvailableFcn = {@(src, event) acquireSamples(obj, src, event), size_data};