请问我用单片机控制DAC0832输出矩形波为什么是这个样子的？

只看该作者 · 2014-5-7 15:02

本帖最后由 90后的小奶粉于 2014-5-7 15:12 编辑

程序如下
#include<iom16v.h>
#include<macros.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char k=0,c=1;
unsigned char i;
#pragma data:code
flash unsigned char juchi[50]={

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
};
#pragma data:data
unsigned int f=10;//示波器上请改变此频率

void delaynus(unsigned int n)
{
if (n == 0)
return ;
  while (--n);
}

void main(void)          //主函数
{

  unsigned char i,j;
  DDRA=0xff;
  PORTA=0xff;
            while(1)
            {
            PORTA=juchi[k];
            delaynus(f);
            k++;
            if(k==50) k=0;
            }

}

真的真的很感谢大家