🚀 go-pugleaf

Hi, down below is the function that i use to initiate my com port,
for some messages i need to set the Parity Bit to '1', and for
other messages i need to reset this bit to '0', how do i do that?

Thanks!

Ramy.


int InitCommunication( void )
{
  COMMTIMEOUTS read_timeout;			                               // timeout structure
  char    com_params[60];
  char    ComName[30];
  HANDLE  ComHndl = NULL;
  DCB     my_DCB;                                                              // device control block structure

  if ( SystemInfo.ErrorInfo.Status != NO_ERRORS )                              // If Error -> Exit
    return 0;

  if ( SystemInfo.ComInfo.ComHandle )                                          // If Port already open
  {
    CloseHandle( SystemInfo.ComInfo.ComHandle );                               // Close Port
    SystemInfo.ComInfo.ComHandle = NULL;                                       // Reset Port Handle
  }
 
  my_DCB.DCBlength= sizeof( my_DCB );                                          // Sizeof(DCB)
  my_DCB.BaudRate = SystemInfo.ComInfo.BaudRate;                               // Current baud rate
  my_DCB.fBinary = true;                                                       // Binary mode, no EOF check
  my_DCB.ByteSize = 8;                                                         // Number of bits/byte, 4-8
  my_DCB.Parity = NOPARITY;                                                    // 0-4=no,odd,even,mark,space
  my_DCB.StopBits = 1;                                                         // 0, 1, 2 = 1, 1.5, 2
  my_DCB.fOutxCtsFlow = 0;                                                     // CTS output flow control
  my_DCB.fOutxDsrFlow = 0;                                                     // DSR output flow control
  my_DCB.fDtrControl = DTR_CONTROL_ENABLE;                                     // DTR flow control type
  my_DCB.fDsrSensitivity = 0;                                                  // DSR sensitivity
  my_DCB.fTXContinueOnXoff = 0;                                                // XOFF continues Tx
  my_DCB.fOutX = 0;                                                            // XON/XOFF out flow control
  my_DCB.fInX = 0;                                                             // XON/XOFF in flow control
  my_DCB.fErrorChar = 0;                                                       // Enable error replacement
  my_DCB.fNull = false;                                                        // Enable null stripping
  my_DCB.fRtsControl = RTS_CONTROL_ENABLE;                                     // RTS flow control
  my_DCB.fAbortOnError = 0;                                                    // Abort reads/writes on error
  my_DCB.XonLim = 50;                                                          // Transmit XON threshold
  my_DCB.XoffLim = 50;                                                         // Transmit XOFF threshold
  my_DCB.XonChar = 0;                                                          // Tx and Rx XON character
  my_DCB.XoffChar = 0;                                                         // Tx and Rx XOFF character
  my_DCB.ErrorChar = 0;                                                        // Error replacement character
  my_DCB.EofChar = 0;                                                          // End of input character
  my_DCB.EvtChar = 0;                                                          // Received event character
  read_timeout.ReadIntervalTimeout = 0;                                        // Read Interval Timeout
  read_timeout.ReadTotalTimeoutMultiplier = 0;                                 // Read Total Timeout Multiplier
  read_timeout.ReadTotalTimeoutConstant = SystemInfo.ComInfo.RxTimeout;        // Read Total Timeout Constant 
  read_timeout.WriteTotalTimeoutMultiplier = 0;                                // Write Total Timeout Multiplier
  read_timeout.WriteTotalTimeoutConstant = SystemInfo.ComInfo.TxTimeout;       // Write Total Timeout Constant 
  strcpy( com_params, SystemInfo.ComInfo.ComPort );                            // Prepare com_params
  strcpy( ComName, SystemInfo.ComInfo.ComPort );                               // Set ComName

  switch ( SystemInfo.ComInfo.BaudRate )
  {
    case CBR_9600:
      strcat( com_params, ":9600, N, 8, 1" );                                  // Prepare COM Parameters
     break;

    case CBR_14400:
      strcat( com_params, ":14400, N, 8, 1" );                                 // Prepare COM Parameters
     break;

    case CBR_19200:
      strcat( com_params, ":19200, N, 8, 1" );                                 // Prepare COM Parameters
     break;

    case CBR_38400:
      strcat( com_params, ":38400, N, 8, 1" );                                 // Prepare COM Parameters
     break;

    case CBR_56000:
      strcat( com_params, ":56000, N, 8, 1" );                                 // Prepare COM Parameters
     break;

    case CBR_57600:
      strcat( com_params, ":57600, N, 8, 1" );                                 // Prepare COM Parameters
     break;

    case CBR_115200:
      strcat( com_params, ":115200, N, 8, 1" );                                // Prepare COM Parameters
     break;
  };

  ComHndl = CreateFile( ComName, GENERIC_WRITE + GENERIC_READ, 0, NULL,        // Open the asked Com Port
                        OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );

  if ( ComHndl == INVALID_HANDLE_VALUE )                                       // Check COM Handle
    return FAIL;

   if ( !BuildCommDCB( com_params, &my_DCB ) )                                 // Fills DCB Structure with Com Values
     return FAIL;

  if ( !SetCommState( ComHndl, &my_DCB ) )                                     // Configures Com Port
    return FAIL;

  if ( !SetCommTimeouts( ComHndl, &read_timeout ) )                            // Set Tx & Rx Timeouts
    return FAIL;

  SystemInfo.ComInfo.ComHandle = ComHndl;                                      // Set Communication Handle

  return PASS;   		                                               // COM Init was successful
}