nios II--实验3——led 100M软件部分

* "Hello World" example.

*

* This example prints ‘Hello from Nios II‘ to the STDOUT stream. It runs on

* the Nios II ‘standard‘, ‘full_featured‘, ‘fast‘, and ‘low_cost‘ example

* designs. It runs with or without the MicroC/OS-II RTOS and requires a STDOUT

* device in your system‘s hardware.

* The memory footprint of this hosted application is ~69 kbytes by default

* using the standard reference design.

*

* For a reduced footprint version of this template, and an explanation of how

* to reduce the memory footprint for a given application, see the

* "small_hello_world" template.

*

*/

#include "system.h"

#include "altera_avalon_pio_regs.h"

#include <stdio.h>

#include <unistd.h>

int main()

{

int i;

printf("Hello from Nios II!\n");

while(1)

{

for( i=0; i<4; i++
)

{

IOWR_ALTERA_AVALON_PIO_DATA( LED_PIO_BASE,
1<<i );

usleep(
1000000
);//each one 0.5s delay

}

}

return
0;

}