新手写的traffic light 程序及仿真图。大家多教教老弟。

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit red_dongxi=P0^0;
sbit yellow_dongxi=P0^1;
sbit green_dongxi=P0^2;
sbit red_nanbei=P0^3;
sbit yellow_nanbei=P0^4;
sbit green_nanbei=P0^5;
void delayms(uint);
void main()
{
while(1)
{
uchar i,j;
green_dongxi=0;
red_nanbei=0;
delayms(3000);
green_dongxi=1;
for(i=5;i>0;i--)
{
yellow_dongxi=0;
delayms(300);
yellow_dongxi=1;
delayms(300);
}
red_nanbei=1;
green_nanbei=0;
red_dongxi=0;
delayms(3000);
green_nanbei=1;
for(j=5;j>0;j--)
{
yellow_nanbei=0;
delayms(300);
yellow_nanbei=1;
delayms(300);
}
red_dongxi=1;
}
}
void delayms(uint x)
{
uchar a;
while(x--) for(a=0;a<120;a++);
}