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  1. while(1)
  2.        {
  3.    // memset(szBuff,0,sizeof(szBuff));
  4.     if( ReadFile(hSerial, LPVOID(szBuff), 1, &dwBytesRead, NULL))
  5.        {
  6.        cout<<szBuff;
  7.        }
  8.     else
  9.        cout<<"noooooooo";
  10.  
  11.        }
  12.      
  13. #include<Windows.h>
  14. #include<stdio.h>
  15. #include<iostream>
  16. using namespace std;
  17.  
  18. void main()
  19. {
  20.  HANDLE hSerial;
  21.  hSerial = CreateFile(TEXT("COM3"),
  22.    GENERIC_READ | GENERIC_WRITE,
  23.    0,
  24.    NULL,
  25.    OPEN_EXISTING,
  26.    FILE_ATTRIBUTE_NORMAL,//FILE_FLAG_OVERLAPPED,
  27.    NULL);
  28.  
  29.  
  30.  
  31. if ( hSerial == INVALID_HANDLE_VALUE)
  32.  {
  33.   printf("Error initializing handler");
  34.  }
  35.  else
  36.  {
  37.  
  38.   // Set the parameters of the handler to the serial port.
  39.   DCB dcb = {0};
  40.  
  41.   dcb.DCBlength = sizeof(dcb);
  42.  
  43.   if ( !GetCommState(hSerial, &dcb) )
  44.   {
  45.    printf("Error setting parameters");
  46.   }
  47.  
  48.   //FillMemory(&dcb, sizeof(dcb), 0);
  49.   dcb.BaudRate = CBR_9600;
  50.   dcb.ByteSize = 8;
  51.   dcb.StopBits = ONESTOPBIT;
  52.   dcb.Parity = NOPARITY;
  53.  
  54.   if ( !SetCommState(hSerial, &dcb) )
  55.   {
  56.    // error setting serial port state.
  57.   }
  58.  
  59.   // Tell the program not to wait for data to show up
  60.   COMMTIMEOUTS timeouts = {0};
  61.  
  62.   timeouts.ReadIntervalTimeout = 0;//20;
  63.   timeouts.ReadTotalTimeoutConstant = 0;//20;
  64.   timeouts.ReadTotalTimeoutMultiplier = 0;//50;
  65.   timeouts.WriteTotalTimeoutConstant = 0;//100;
  66.   timeouts.WriteTotalTimeoutMultiplier = 0;//100;
  67.  
  68.   //if ( !SetCommTimeouts(hSerial, &timeouts) )
  69.   //{
  70.   // printf("Error setting the timeouts");
  71.   //}
  72.  
  73.   char szBuff[2] = "";
  74.   DWORD dwBytesRead = 0;
  75.   int i = 0;
  76.   char test[] = "Bn";
  77.  // int maxSamples = 10;
  78.  // DWORD dwCommStatus;
  79.  
  80.   //WriteFile(hSerial, test, 2, &dwBytesRead, NULL);
  81.  
  82.   // SetCommMask(hSerial,EV_RXCHAR);
  83.   // WaitCommEvent (hSerial, &dwCommStatus, 0);
  84.  
  85.  //  if (dwCommStatus & EV_RXCHAR)
  86.    {
  87.  
  88.        while(1)
  89.        {
  90.    // memset(szBuff,0,sizeof(szBuff));
  91.     if( ReadFile(hSerial, LPVOID(szBuff), 1, &dwBytesRead, NULL))
  92.        {
  93.        cout<<szBuff;
  94.        }
  95.     else
  96.        cout<<"noooooooo";
  97.  
  98.        }
  99.  
  100.  
  101.  
  102.    }
  103.  
  104.  
  105.  
  106.  
  107.  
  108.   CloseHandle(hSerial);
  109.  }
  110.     }
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