[求助]交通燈設(shè)計(jì)

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int

sbit RED_A=P0^0;
sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
sbit RED_B=P0^3;
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;

uchar Flash_Count = 0;
Operation_Type = 1;

void DelayMS(uint x)
{
  uchar t;
 while(x--)
 {
   for(t=120;t>0;t--);
 }
}

void Traffic_lignt()
{
  switch(Operation_Type)
 {
   case 1:
   RED_A=1;YELLOW_A=1;GREEN_A=0;
   RED_B=0;YELLOW_B=1;GREEN_B=1;
   DelayMS(2000);
   Operation_Type = 2;
   break;
  case 2:
   DelayMS(200);
   YELLOW_A=~YELLOW_A;
   if(++Flash_Count !=10)
    return;
   Flash_Count=0;
   Operation_Type = 3;
   break;
  case 3:
   RED_A=0;YELLOW_A=1;GREEN_A=1;
   RED_B=1;YELLOW_B=1;GREEN_B=0;
   DelayMS(2000);
   Operation_Type = 4;
   break; 
  case 4:
   DelayMS(200);
   YELLOW_B=~YELLOW_B;
   if(++Flash_Count !=10)
    return;
   Flash_Count=0;
   Operation_Type = 1;
   break; 
 }
}

void main()
{
  while(1)
 {
   Traffic_lignt(); 
 }
}