Loosing data during serial connection.

Question

Vic Bay 2016-11-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/313898-loosing-data-during-serial-connection

评论： Vic Bay 2016-11-25

Dear All! I have a device sending data to my PC via COM port. Firstly device sends 1000 strings with data, then another info (plus 3 strings) and after all EOT symbol. I receive and process all this data on my PC using MATLAB. But MATLAB receives only 608 strings, at that the last string includes a EOT symbol. When I use a terminal programm to receive data from my device it receives all the data. Please help me to resolve this problem. And one more question: I receive data while EOT symbol is received. Is there any elegant way to catch it? Thank you!

    try
          sp = serial(currentPort, 'baudRate', 115200);
          msg = strcat(currentPort,' opened successfully!');
          fopen(sp);
          set(handles.state, 'ForegroundColor', [0, 1, 0]);    
          set(handles.state, 'String', msg);
      catch ME
          set(handles.state, 'ForegroundColor', [1, 0, 0]);
          set(handles.state, 'String', 'Error');
          fclose(sp);
          msg = strcat(currentPort,' CLOSED!');
          set(handles.state, 'ForegroundColor', [0, 0, 0]);    
          set(handles.state, 'String', msg);
          delete(sp);
          clear sp;
      end;
      %----------DATA aquisition&Processing----------
      %----------------------------------------------
      try
          fprintf(sp, 'r');
          set(handles.state, 'String', 'Aquiring data...');
          i = 1;
          while(sp.BytesAvailable)
              receivedChar = fscanf(sp);
              msg = strrep(receivedChar, ';', ' ');
              msg = strrep(msg, ':', ' ');
              if(str2num(msg))
                  numOfData = numOfData + 1;
              end;
              if(contains(msg, 'key'))            
                  numOfKeys = numOfKeys + 1;
              end; 
              dataCells{i,1} = msg;
              i = i + 1; 
              disp(dataCells);   
          end;   
      catch ME
          set(handles.state, 'ForegroundColor', [1, 0, 0]);
          set(handles.state, 'String', 'Error');
          fclose(sp);
          msg = strcat(currentPort,' CLOSED!');
          set(handles.state, 'ForegroundColor', [0, 0, 0]);    
          set(handles.state, 'String', msg);
          delete(sp);
          clear sp;
      end;
      keys = zeros(numOfKeys, 1);
      time = zeros(numOfData,1);
      dataODS10L = zeros(numOfData,1);
      dataODS96 = zeros(numOfData, 1);
      k = 1;
      l = 1;
      try
      set(handles.state, 'String', 'Data processing...');
      for i = 1 : size(dataCells)    
          if((~isempty(dataCells{i,1})))
              if(contains(dataCells{i,1}, 'key'))
                  [keyToken, keyRemain] = strtok(dataCells{i, 1}, ' ')        
                  keys(k) = str2double(keyRemain);
                  k = k + 1;
              end;       
              [data, status] = str2num(dataCells{i,1});
              if(status)        
                  time(l) = data(1);
                  dataODS10L(l) = data(2);
                  dataODS96(l) = data(3);
                  l = l + 1;
              end;
          end;
      end;
      catch ME
          set(handles.state, 'ForegroundColor', [1, 0, 0]);
          set(handles.state, 'String', 'Error');
          fclose(sp);
          msg = strcat(currentPort,' CLOSED!');
          set(handles.state, 'ForegroundColor', [0, 0, 0]);    
          set(handles.state, 'String', msg);
          delete(sp);
          clear sp;
      end;
      fclose(sp);
      delete(sp);
      clear sp;