Writing to UART

Simple code, trying to write to UART from terminal and light an LED if character "A" is detected. What am i doing wrong? here is the code. The manual of UART is here under \devices: http://www-ug.eecg.toronto.edu/msl/nios.html

# include <stdio.h># define RS232_UART_DATA ((volatile int*) 0x10001010)# define RS232_UART_CONTROL ((volatile int*) (0x10001010+4))

volatile int*LED =(int*)0x10000010;

int main()

{

unsigned char *pinput;

while(*pinput){

//strings in C are zero terminated

//if room in output buffer

if((*RS232_UART_DATA)&0xffff0000 )

{

//then read the next character

*(pinput)= *RS232_UART_DATA;

}

if (pinput =='A'){

*(LED)=1; }

}

}