移位.c

本文件包含了使用C语言编写单片机的各种入门程序

#include<reg51.h>
#include<stdio.h> 
sbit sda=P0^2;
sbit scl=P0^3;
code char led[]={0xfe,0xfd,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};
int a ,b,num,i,j,k;
delay()
{
for(i=0;i<50;i++)
for(j=0;j<125;j++);
}
shift()
{
num=led[b];
scl=0;
for(k=0;k<8;k++)
{
if(num&0x80)
sda=1;
else 
sda=0;
scl=1;
scl=0;
num=num<<1;
}
}

void main()

{
do


{
b=0;
shift();
delay();
b=1;
shift();
delay();
b=2;
shift();
delay();
b=3;
shift();
delay();
b=4;
shift();
delay();
b=5;
shift();
delay();
b=6;
shift();
delay();
b=7;
shift();
delay();
}
while(1);
}