lcd module?

i am a new to nios. i use the stratix board to develop a easy lcd display programm, i see there is a programm named pio_lcd16207.c in the sdk/lib, so i use the functions of this c file , but the lcd either show nothing or display unkown char,what the problem ?the lcd display programm can run in the standard_32 configution successfully. dos my configuration has problem?or cann&#39;t use the functions of the pio_lcd16207.c ,or others,please help!!!! the easy lcd programm is below:# include <stdio.h># include "pio_lcd16207.h"# include "nios.h"

int main(void)

{

nr_pio_lcdinit(na_lcd_pio);

while(1)

{

nr_pio_lcdwritescreen("Hello! This is Nios.");

nr_delay(1400);

}

return 0;

}