OMAP5432 UART2 linux user test failure

I want to use OMAP5432 UART2 available on J17 external connectore (TX pin3, RX pin5).

The following log is present in dmsg:

[    0.664642] 48020000.serial: ttyO2 at MMIO 0x48020000 (irq = 106) is a OMAP UART2

When I execute the test code bellow , I have nothing on J17 pin3 on the scope.

My test code:

fd = open_serial_port("/dev/ttyO2);

write (fd, buf,1);

int open_serial_port(char *name) {  int  remote_desc;  struct termios termios;        memset (&termios, 0, sizeof (termios));

 remote_desc = open (name, O_RDWR | O_NOCTTY | O_NDELAY |  O_NONBLOCK);  if (remote_desc < 0) {    perror ("Could not open remote device");    return -1;  }

 tcgetattr(remote_desc, &termios);

 cfsetispeed(&termios, B115200);  

cfsetospeed(&termios, B115200);     

termios.c_cflag |= B1152000 | CBAUDEX;     

cfmakeraw(&termios); 

termios.c_cflag &= ~CRTSCTS;     

termios.c_iflag &= ~(IXON | IXOFF | IXANY);    

termios.c_cflag &= ~PARENB; 

 termios.c_cflag &= ~CSTOPB;

termios.c_cflag &= ~CSIZE; 

termios.c_cflag |= CS8;    

termios.c_cflag |= (CLOCAL | CREAD);      

termios.c_lflag &= ~(ICANON | IEXTEN | ECHO | ISIG); 

termios.c_iflag &= ~(ICRNL | INPCK | ISTRIP | BRKINT);     

 termios.c_oflag &= ~OPOST; 

  termios.c_cc[VMIN] = 0;      

termios.c_cc[VTIME] = 3;

  if (tcflush (remote_desc, TCIOFLUSH) < 0)     {       printf ("\n Flushing port failed");       return -1 ;     }  

if (tcsetattr(remote_desc, TCSANOW, &termios) < 0)     {       printf ("\n Setting port failed");       return -1;     }

     printf("UART %s configured....\n",name);

    return remote_desc;

}