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;

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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<<j); //点亮流水灯，PIO_BASE         for(i = 0;i<1000000;i++);        }    }  }  return 0;}