simple matlab script to communicate with a monome grid usingf serial port functions

cerealgrid.m

% get a list of devices connected to serial ports
% create a serial port object (s) -- on my computer it was the 6th device  
a = seriallist; 
s = serial(a{6});
s.Terminator = 'CR';

% open serial port object
fopen(s)

% FREAD: 3 bytes for the input buffer
% byte 1 = type of event of detected  (33 is button press, 32 is button release)
% byte 2 = column of event
% byte 3 = row of event   

% FWRITE: 4 bytes to the grid to control LEDs
% byte 1 = type of event of detected  (33 is button press, 32 is button release)
% byte 2 = column of button
% byte 3 = row of button  
% byte 4 = intensity of LED (0-15) 
 
 
  
% apologies for the infinite loop - use Ctrl-Break to exit  
% be sure to use fclose(s) after exiting the loop    
while 1==1     
   
   % read input buffer  
   A = fread(s,3);
   
   % if an event if detected
   if ~isempty(A)
     
     % turn on led          
     if A(1)==33
           fwrite(s,[24 A(2) A(3) 15]);
           % display column and row of button pressed
           disp([A(2) A(3)]);           
       end
         
       % turn off led   
       if A(1)==32
           fwrite(s,[24 A(2) A(3) 0]);
       end
   end
   
end