ARM:UART Serial comunication on LM3S8962

I am working on LM3S8962 and need to write a program to comunicate with PC via UART. I use Labview inline C node to write codes using ARM_Serial.c which is from Keil Software.

The file has

int ARM_Serial_InitPort (int serDevNo, unsigned long baudrate, unsigned int  databits, unsigned int  parity,   unsigned int  stopbits)
int ARM_Serial_Write (int serDevNo, const char *buffer, int *length)

I tried to use them to control serial port, but it didn't work well. I used U0TX, U0RX and GND pins on micro controller to connect to a serial port in PC.

I couldn't find any information about ARM_Serial_InitPort and ARM_Serial_Write functions on the internet. Any information or tips about it would be very appreciatted.

Thank you.

Masa