[perl-win32-gui-users] Need help for using Win32::SerialPort Module

[Doan, Khoa]

Hi,

I am writing a PERL GUI application that need to use the Win32::SerialPort
module.  I have no problem of read and display information on a command
prompt window.  But when I tried to write to a file with the information
that I'd read from the serial port, I got this control characer "^M" inside
the file and the line was very long.  There are several examples and manual
how to use the Win32::SerialPort in internet, but they are not helping me
much.  I am just wondered if anyone has experience with module or know how
fix the problem, please show me.

Below is the code:

use Win32::SerialPort;

$PortObj = new Win32::SerialPort ('COM1')
       || die "Can't open $PortName: $^E\n";

$flowcontrol = $PortObj->handshake("none"); 
$baudrate = $PortObj->baudrate(38400);
$parity = $PortObj->parity("none");
$databit = $PortObj->databits(8);
$stopbit = $PortObj->stopbits(1);

$PortObj->write_settings || undef $PortObj;
  print "Can't change Device_Control_Block: $^E\n" unless ($PortObj);

open(LOG,">test.log");

Loop:
    $input = $PortObj->input;
    if ($input ne "") {
      print "$input";
      print LOG "$input";
    }
goto Loop;

Thanks in advance.

Khoa D.