How can you separate incoming serial data?

Question

alex korzaniewski 2013-4-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72938-how-can-you-separate-incoming-serial-data

I have incoming serial data from an Arduino board that update continuously. The data is separated by questions marks (?). How would I go about reading the data in MATLAB and separating it into a (12x1) column vector so I can call an index of that vector? I have tried fscanf() but have been unable to get the results I want.

From Arduino:

152?-9?215?-669?2541?1273?-141?27?-452?20.30?97242.00?345.62? ect
delete(instrfind)
s=serial('COM4','BaudRate',9600); %start serial port to arduino
s.ReadAsyncMode = 'continuous';
fopen(s); %open port
while (s.Status == 'open')
C=fscanf(s, '?');
C 
if(s.Status ~= 'open')
    break;
end
end

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Answer 1

Matthias 2013-4-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72938-how-can-you-separate-incoming-serial-data#answer_82938

在 MATLAB Online 中打开

I don't have an Arduino, so I couldn't test it. But how about that:

c_str=regexp(C,'?','split');

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alex korzaniewski 2013-4-20

编辑：alex korzaniewski 2013-4-20

在 MATLAB Online 中打开

Thank you so much for the quick reply. The code worked perfectly and did exactly what I wanted. I ended up with:

delete(instrfind)
s=serial('COM4','BaudRate',9600); %start serial port to arduino
s.ReadAsyncMode = 'continuous';
fopen(s); %open port
 while (s.Status == 'open')
   C=fscanf(s);
   c_str = regexp(C, '?', 'split')
     if(s.Status ~= 'open')
       break;
     end
   end

With this, I was able to get a matrix where I could pull out certain indexes. Ex:

c_str = 
    Columns 1 through 6
      '143'    '-10'    '216'    '-59'    '-11'    '-206'
    Columns 7 through 11
      '-133'    '-115'    '-483'    '21.70'    '97483.00'
    Columns 12 through 13
      '324.90'    [1x2 char]
c_str(10) =
           '21.70'