Printing the data from a serial port

Hi all,

I am trying to write a simple C app that simply continues to write the data it captures off the serial port.  Below is a peice of code I found here, but I am getting into the "Have a problem while receiving data".  I want to just print to the screen anything it finds on the port.

#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

int main ( void )
     int     iHandler;
     struct termios trmNewtio;
     long     lByteWrite;
     long     lByteRead;
     char     szData [12];

     //     Trying to open as file desc
     iHandler = open ( "/dev/ttyS0", O_RDWR | O_NONBLOCK );
     if ( iHandler == -1 )
          printf ( "Error while opening the port.\n" );
          return -1;

     //     Setup Terminal Poperties
     //     CS8 - 8 bit data
     //     CLOCAL - ignore modem control lines
     //     CREAD - enable receiver
     trmNewtio.c_cflag = CS8 | CLOCAL | CREAD;
     trmNewtio.c_iflag = IGNPAR;          //ignore framing errors and parity errors.
     trmNewtio.c_oflag = 0;               //Not used
     trmNewtio.c_lflag = 0;               //Not used
     cfsetispeed ( &trmNewtio, B9600 );     //Setup speed
     tcflush ( iHandler, TCIOFLUSH );
     tcsetattr ( iHandler, TCSANOW, &trmNewtio );     //Actual set

     //     Actual Receive
     while (1) {
     lByteRead = read ( iHandler, szData, 10 );
     if ( lByteRead != 10 )
          printf ( "Have a problem while receiving data\n" );
     printf("Read: %s\n", szData);
     //     close the port
     if ( close ( iHandler ) < 0 )
          printf ( "Error: Failed to close.\n" );

     return 0;
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Jinesh KamdarCommented:
I dont know if this will work, but have u tried reading in each byte instead of a block of 10 bytes ???

lByteRead = read ( iHandler, szData, 1 );
if ( lByteRead != 1 )
      printf ( "Have a problem while receiving data\n" );
      printf("Read: %s\n", szData);

Also, make sure u have specified the right settings for the port in ur program.

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DanRaposoAuthor Commented:

It was actually something completely non-code related.  
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