nios ii之流水灯两点注意（QSYS版）

新手学nios ii出错，手录如下

 版本 quartus ii 11.0 和nios ii 11.0:

1.除了内部片内ram和rom需要连接data_master,instruction_master,其他只需连接到data_master;

.

2.注意若片上资源不够，需优化代码，以下程序验证通过

#include "system.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"




int main (void) __attribute__ ((weak, alias ("alt_main")));
int alt_main (void)
{
   volatile int i;


  /*
   * Infinitely shift a variable with one bit set back and forth, and write
   * it to the LED PIO.  Software loop provides delay element.
   */
  while (1)
  {
    int j=0;
    while (1)
    {
        for(j=0;j<8;j++)
        {
        IOWR_ALTERA_AVALON_PIO_DATA(PIO_BASE, 1<