What's wrong with my programm?

I have write a programme to initialize the lcd16207,but it couldn&#39;t work correctly. The code is:# include <unistd.h># include <stdlib.h># include <stdio.h>

//#include "lcd_16207.h"

/* Commands which can be written to the COMMAND register */

enum /* Write to character RAM */

{

LCD_CMD_WRITE_DATA = 0x80

/* Bits 6:0 hold character RAM address */

};

enum /* Write to character generator RAM */

{

LCD_CMD_WRITE_CGR = 0x40

/* Bits 5:0 hold character generator RAM address */

};

enum /* Function Set command */

{

LCD_CMD_FUNCTION_SET = 0x20,

LCD_CMD_8BIT = 0x10,

LCD_CMD_TWO_LINE = 0x08,

LCD_CMD_BIGFONT = 0x04

};

enum /* Shift command */

{

LCD_CMD_SHIFT = 0x10,

LCD_CMD_SHIFT_DISPLAY = 0x08,

LCD_CMD_SHIFT_RIGHT = 0x04

};

enum /* On/Off command */

{

LCD_CMD_ONOFF = 0x08,

LCD_CMD_ENABLE_DISP = 0x04,

LCD_CMD_ENABLE_CURSOR = 0x02,

LCD_CMD_ENABLE_BLINK = 0x01

};

enum /* Entry Mode command */

{

LCD_CMD_MODES = 0x04,

LCD_CMD_MODE_INC = 0x02,

LCD_CMD_MODE_SHIFT = 0x01

};

enum /* Home command */

{

LCD_CMD_HOME = 0x02

};

enum /* Clear command */

{

LCD_CMD_CLEAR = 0x01

};# define na_lcd_pio_command ((volatile int *) 0x80920850)# define na_lcd_pio_status ((volatile int *) 0x80920851)# define na_lcd_pio_wr_data ((volatile int *) 0x80920852)# define na_lcd_pio_rd_data ((volatile int *) 0x80920853)

# define PIO_LCD_IO_COMMAND (*na_lcd_pio_command)# define PIO_LCD_IO_STATUS (*na_lcd_pio_status)# define PIO_LCD_IO_WR_DATA (*na_lcd_pio_wr_data)# define PIO_LCD_IO_RD_DATA (*na_lcd_pio_rd_data)

void delay(int para)//delay for 0.2*para ms

{

int i=0,j=0;

for(i=0;i<para;i++)

for(j=0;j<10000;j++)

}

int main()

{

delay(75);

PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT;

delay(21);

PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT;

delay(1);

PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT;

PIO_LCD_IO_COMMAND=LCD_CMD_FUNCTION_SET | LCD_CMD_8BIT | LCD_CMD_TWO_LINE;

PIO_LCD_IO_COMMAND=LCD_CMD_ONOFF;

PIO_LCD_IO_COMMAND=LCD_CMD_CLEAR;

PIO_LCD_IO_COMMAND=LCD_CMD_MODES | LCD_CMD_MODE_INC;

PIO_LCD_IO_COMMAND=LCD_CMD_ONOFF | LCD_CMD_ENABLE_DISP;

delay(1000);

return 0;

}

My operation system is uClinux,and the board is cyclone,what&#39;s wrong with me? help!