Serial Buffer Problem I presume ...pls help

[Akhil Bhandari]

Hi All,

           The following the code snippet for my open
serial, close serial and write serial, it works
absolutely fine for some time and after 4 to 5 writes
it shows some old values , some values, I mean say very
wired data, can pls tell me where I am going wrong.I
have increased the size of the buffer too.I have done
SrmReceiveFlush and SrmSendFlush also.

pls go through the code below....................I more
thing when I comment out WinDrawChars() all Srm
functions doesn't seem to work.

Thanks n Regards
Akhil

-------------------------------------------------------
-----------------------

//OPEN PORT CODE

Err OpenSerial(void)  {
    Err     error = 0;
    UInt32  flags = 0;
    UInt16  flagsSize = sizeof(flags);

  // Open the serial port with an initial baud rate of
9600.
    error = SrmOpen(serPortCradlePort, 57600,
&gPortID);
    SrmSetReceiveBuffer(gPortID,bufP,2048);
 /*ErrNonFatalDisplayIf(error == serErrBadPort,
                      "OpenSerial: serErrBadPort");*/

 if(error == 0)
 {
  //n WinDrawChars("1Serial Port
Open.............",15,10,20);
 }

    switch (error) {
     case errNone:
   //n WinDrawChars("ae this is the
case.............",25,10,50);
      break;

     case serErrAlreadyOpen:
      gDetectSerialPortError = 1;
         // Clear the port in case garbage data is
hanging around.
            SrmReceiveFlush(gPortID, 100);
      SrmClose(gPortID);
   //n WinDrawChars("Already
Open.............",15,50,50);
      return error;
      break;

     default:
   //n WinDrawChars("2Serial Port
Open.............",20,50,50);
      return error;
      break;
    }

    gConnected = true;

 // Clear the port in case garbage data is hanging
around.
 SrmSendFlush(gPortID);

    SrmReceiveFlush(gPortID, 100);

    // Set communications parameters to 8-N-1 with
hardware flow control.
    flags = srmSettingsFlagBitsPerChar8 |
            srmSettingsFlagStopBits1 |
            srmSettingsFlagRTSAutoM;
    error = SrmControl(gPortID, srmCtlSetFlags, &flags,
&flagsSize);
    ErrNonFatalDisplayIf(error, "OpenSerial: port
config error");

    return error;
}

//CLOSE PORT CODE

void CloseSerial(void)  {
 Err  error;
 UInt32 *numBytesP = 0;

 error = SrmSendWait(gPortID);
 ErrNonFatalDisplayIf(error == serErrBadPort,
"SrmClose: bad port");
 if (error == serErrTimeOut)
  WinDrawChars("Time out close.............",30,10,50);

    // Clear the port in case garbage data is hanging
around.
    SrmSendFlush(gPortID);
    SrmReceiveFlush(gPortID,100);
    SrmSendCheck(gPortID,numBytesP);
    if(numBytesP == 0 )
      WinDrawChars("All Sent",10,10,10);
    else
      WinDrawChars("All Not Sent",10,10,10);
    SrmSetReceiveBuffer(gPortID,NULL,NULL);
 SrmClose(gPortID);

 gConnected = false;
}


//WRITE PORT CODE

void WriteSerial(void) {
 UInt16 len1;
    Err     error;
    Char    *text = "nish";
    Char    lineFeed = chrLineFeed;

    // Bail out if not connected.
    if (gConnected == false) return;

    // Send the contents of the outgoing field.
    len1 = SrmSend(gPortID, text, StrLen(text),
&error);

    if (error)
    {
  //WinDrawChars("char sent",11,10,70);
 }

 if(len1 == 4)
 {
  //WinDrawChars("4good char sent",11,10,90);
 }

 if(len1 == 5)
 {
  //WinDrawChars("5good char sent",11,10,90);
 }

    // Send a linefeed character.
    SrmSend(gPortID, &lineFeed, 1, &error);

    if (error)
  WinDrawChars("line feed sent",11,10,80);
}





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