Trying to get serial data from AWR6843AOPEVM

Hi,

I'm using TI radar AWR6843AOPEVM, trying to get the serial data in matlab using below code.

s= serialport("COM5", 921600, 'DataBits',8);

fid=fopen("seriallog.txt",'a');

while(true)

data=readlines(s,200,'string')

fprintf(fid,data);

end

But When i connect this board with arduino IDE it directly display the data in serial monitor.

Answer 1

[Shubham]

Hi Vinoth,

I have a few suggestions.

The "readlines" function is probably used for reading from a file. You can check the documentation for "readlines" function here: https://www.mathworks.com/help/matlab/ref/readlines.html

For reading data from a serial port, try using "read" or "readline" functions as illustrated in the following documentation: https://www.mathworks.com/help/matlab/import_export/write-and-read-serial-port-data.html

You can try exeption handling to verify if everything is working as desired.

Also, since the "readline" function returns data as a string, you need to adjust the format specifier in "fprintf".

s = serialport("COM5", 921600, 'DataBits', 8);
fid = fopen("seriallog.txt", 'a');

% Check if the file was opened successfully
if fid == -1
    error('Failed to open file for writing.');
end
try
    while true
        data = readline(s);
        disp(data);
        fprintf(fid, '%s\n', data);
    end
catch ME
    disp(ME.message);
end

% Close the serial port and the file
delete(s);
fclose(fid);

I would also suggest to use available callback functions as shown in the following documentation: https://www.mathworks.com/help/matlab/import_export/use-events-and-callbacks-for-serial-port-communication.html

You may also find the following MATLAB Answers relevant:

https://www.mathworks.com/matlabcentral/answers/421759-how-to-read-com-port-data-continuously-and-plot-the-data-live-in-matlab

https://www.mathworks.com/matlabcentral/answers/97373-is-it-possible-to-read-from-or-write-to-a-serial-port-with-matlab

I hope this helps!