DE2-70 Nios II problem

Hi everyone,

First of all im newbie of FPGAs

Now im working with DE2-70 and my design works.

but i have new problem like,

../hello_world.c: In function `test1_led':

../hello_world.c:24: error: `IOWR_ALTERA_AVALON_PIO_DATA' undeclared (first use in this function)

../hello_world.c:24: error: (Each undeclared identifier is reported only once

../hello_world.c:24: error: for each function it appears in.)

../hello_world.c:24: warning: left-hand operand of comma expression has no effect

../hello_world.c:26: error: `PIO_RED_LED_BASE' undeclared (first use in this function)

../hello_world.c:26: error: syntax error before "led_mask"

../hello_world.c:28: warning: implicit declaration of function `usleep'

../hello_world.c:30:2: warning: no newline at end of file

../hello_world.c:30: error: syntax error at end of input

my code;

# include "system.h"

# include "altera_avalon_pio_regs.h"

# include "alt_types.h"

void test1_led(void){

alt_u32 led_mask=0;

while(1){

// green led control

// red led control

(IOWR_ALTERA_AVALON_PIO_DATA, led_mask); PIO_RED_LED_BASE

// toggle led

led_mask ^= 0xFFFFFFFF;

// sleep 0.2 second

usleep(200*1000);

} // while