text1.c

一般的交通灯

#include "reg51.h"
#define uchar unsigned char 
uchar dispcode[4]={0x3f,0xed,0xde,0xdd};
void delaly05s(void)
{
unsigned char i,j,k;
for(i=5;i>0;i--)
{
for(j=200;j>01;j--)
{
for(k=250;k>0;k--);{;}
}
}
}
void main (void)
{
char i;
while(1)
{
for(i=4;i>0;i--)
{
P2=dispcode[i];
delay05s();
}
}
}