How to use uart in dm6446 processor ?

I am new to this processor. I want to know how we can use the uart in dm6446 processor using CCS 3.3 version in interrupt fashion.

I have got one example in which they use following api to sent and receive data through uart:

UartHandle = DAVINCIEVM_UART_open(0,115200);

while(1)

{

while(DAVINCIEVM_UART_rcvReady(UartHandle));

DVINCIEVM_UART_getchar(UartHandle, x);

while(DAVINCIEVM_UART_xmtReady(UartHandle));

DVINCIEVM_UART_putchar(UartHandle, y);

}

But i want to know how to write ISR for uart so that i can do other things in main code.

regards

Anand