Problem using 'getkey'.

For some reason 'getkey' is not working in Matlab R2014a. It keeps saying 'undefined function/variable' whenever I use getkey. Can anyone tell me what to do?

clear all;
clc;
 fprintf('\nPress any key: ') ;
% prompt='Enter any key';
%ch=input(prompt);
k=getkey;
answer=1;
arduino=serial('COM15','BaudRate',9600); % create serial communication object on port COM15

fopen(arduino); % initiate arduino communication
 while(answer)

      fprintf(arduino,'%s',char(k)); % send answer variable content to arduino
      answer=input('Enter value(0=EXIT PROGRAM): ');
   end
  fclose(arduino); % end communication with arduino

Answer 1

[Geoff Hayes]

The error message

 Undefined function or variable 'getkey'.

is telling you that MATLAB can't find the function getkey within the MATLAB search path. Is this a function that you have written or have downloaded from somewhere?

You may want to check the submission from Jos (10584) to the MATLAB File Exchange which can be found at http://www.mathworks.com/matlabcentral/fileexchange/7465-getkey. You will need to download this code and place it within your MATLAB search path.

[Em_23]

Thank you so much. It's working now!! :)

[armando herculano]

k=getkey, o que não é uma função padrão em MATLAB. Se você estiver tentando capturar a tecla pressionada pelo usuário, você pode usar a função pause junto com a função getch (ou getch no Windows).

esta função getkey é específica para o sistema operacional Windows.

Answer 2

[MathWorks MATLAB Hardware Team]

Hello,

Thank you for contacting us.

To enhance your experience interfacing Arduino with MATLAB, we suggest utilizing the MATLAB Support Package for Arduino hardware. You can find more information here: https://in.mathworks.com/matlabcentral/fileexchange/47522-matlab-support-package-for-arduino-hardware

Best regards,

MATLAB Hardware Team

MathWorks