Problem with character LCD on Cyclone III FPGA Development Kit

thank you for your reply. Im new in NIOS II. The LCD is now working. Now i need to write some charater on the LCD if i press a button and a different one when a relaese the button. FOr example:

if button = 1 "HELLO"

else "HI".

i've write the follwing xode but is doesn't work. Can you hel me o n this.

thank you.

int main (void)

{

// int nbChar;

int botao;

FILE * lcd;

lcd = fopen(LCD_DISPLAY_NAME, "w"); // Open the LCD device

botao = IORD_ALTERA_AVALON_PIO_EDGE_CAP(USER_PB_BASE);

if (botao == 1)

fprintf(lcd, "LASSE 2011\n");

else

fprintf(lcd, "Second line 2011\n");

return(0);

}