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Cypher236
Cypher236

Reputation: 527

Permanently open a COM port in MatLab

So in my MatLab program I open a COM port to broadcast a pulse using the following:

x = serial('COM10','Baudrate',9600);

However the COM port closes after the pulse has been sent. Since I'm going to be sending lots of pulses throughout the execution of the program I want to keep the COM port permanently open so that I don't have to keep reopening it.

I'm unsure how to do this, it was suggested to me that I put the com port variable into a handle in MatLab to keep it permanently open but I'm not sure how to do this.

Any help would be much appreciated.

Thanks.

Upvotes: 0

Views: 208

Answers (1)

Claes Rolen
Claes Rolen

Reputation: 1466

It should be open until you close it with fclose: 

% Creat serial object
x = serial('COM10','Baudrate',9600);
% Open serial port
fopen(x);
% Write to serial port
fprintf(x,'ABC');'
fprintf(x,'DEF');'
% ... 

% Close the serial port
fclose(x);

Upvotes: 2

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