this days i approch a promble that when using a structure in nios 10.1sp to operate pio,but i doesn't work at all. The details as flowing.

讓客戶滿意是我們工作的目標(biāo)，不斷超越客戶的期望值來自于我們對這個行業(yè)的熱愛。我們立志把好的技術(shù)通過有效、簡單的方式提供給客戶，將通過不懈努力成為客戶在信息化領(lǐng)域值得信任、有價值的長期合作伙伴，公司提供的服務(wù)項目有：主機域名、網(wǎng)站空間、營銷軟件、網(wǎng)站建設(shè)、武都網(wǎng)站維護、網(wǎng)站推廣。

#define PIO_LED_BASE 0x101000

i define a structure for pio like this.

typedef struct{
 volatile unsigned long int DATA;
 volatile unsigned long int DIRECTION;
 volatile unsigned long int INTERRUPT_MASK;
 volatile unsigned long int EDGE_CAPTURE;
}LED_REG;

void led_reg_write(void)
{
 unsigned char i;

 for(i = 0; i < 8; i += 1){
  LED -> DATA = 1 << i;
  usleep(2000000);
 }
}

int main()
{
 while(1)
  led_reg_write();
}

my program is to shift the led one by one,but i doesn't work at all.

Is that a problem of the nios 10.1sp? Is there somebody met the same problem before?

當(dāng)前文章：nios10_1spcannotdefinestructuretooperatePIO?
文章鏈接：http://aaarwkj.com/article44/iihiee.html

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