51单片机交通灯

ID:349027 · 发表于 2018-6-10 21:21

源程序如下
#include<reg51.h>
//    数据类型定义
#define u8 unsigned char
#define u16 unsigned int
//    数码管段选数组
u8 code NUM[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};
u8 time_cnt=0;
u8 turn_yellow=0;
u8 ex =1;
u8 turnflag=0;

u8 left_time;
u8 for_time;
// 管脚定义
sbit left_red = P3^0;
sbit left_yellow = P3^1;
sbit left_green  = P3^2;
sbit for_red    = P3^3;
sbit for_yellow  = P3^4;
sbit for_green = P3^5;
sbit leftc=P2^7;
sbit forc = P2^6;
// 延时函数
void delay_us(u16 t)
{
while(t--);
}
// 定时器 50ms
void Timer_Init()
{
EA=1;
ET0=1;
TMOD=0x01;
TH0=15536/256;
TL0=15536%256;
TR0=1;
}
//前方向黄灯亮
void foryellow()
{
forc=0;
leftc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 1;
left_yellow = 0;
left_green  = 1;
leftc=0;
forc=1;
for_red=1;
for_yellow=1;
for_green=0;
left_red = 0;
left_yellow = 1;
left_green  = 1;
forc=0;
}
// 左右方向黄灯亮
void leftyellow()
{
forc=0;
leftc=1;
for_red=1;
for_yellow=1;
for_green=0;
left_red = 0;
left_yellow = 1;
left_green  = 1;
leftc=0;

forc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 1;
left_yellow = 0;
left_green  = 1;
forc=0;
}
//前方向转向
void forturn()
{
forc=0;
leftc=1;
for_red=1;
for_yellow=1;
for_green=0;
left_red = 0;
left_yellow = 1;
left_green  = 1;
leftc=0;

forc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 0;
left_yellow = 1;
left_green  = 1;
forc=0;
}
//左右方向转向
void leftturn()
{
forc=0;
leftc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 0;
left_yellow = 1;
left_green  = 1;
leftc=0;

forc=1;
for_red=1;
for_yellow=1;
for_green=0;
left_red = 0;
left_yellow = 1;
left_green  = 1;
forc=0;
}
//前进绿灯
void forgo()
{
forc=0;
leftc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 1;
left_yellow = 1;
left_green  = 0;
leftc=0;

forc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 0;
left_yellow = 1;
left_green  = 1;
forc=0;
}
//前进红灯
void forstop()
{
forc=0;
leftc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 0;
left_yellow = 1;
left_green  = 1;
leftc=0;

forc=1;
for_red=0;
for_yellow=1;
for_green=1;
left_red = 1;
left_yellow = 1;
left_green  = 0;
forc=0;
}
//前进方向数码管显示
void dispfor(u8 num)
{
P2|=0x0f;
P0=0xff;
P2=(P2&0xc0)|0x01;
P0=NUM[num/10];
delay_us(100);
P0=0xff;
P2|=0x0f;
P0=0xff;
P2=(P2&0xc0)|0x02;
P0=NUM[num%10];
delay_us(100);
P0=0xff;
}
//左右方向数码管显示
void displeft(u8 num)
{
P2|=0x0f;
P0=0xff;
P2=(P2&0xc0)|0x04;
P0=NUM[num/10];
delay_us(100);
P0=0xff;
P2|=0x0f;
P0=0xff;
P2=(P2&0xc0)|0x08;
P0=NUM[num%10];
delay_us(100);
P0=0xff;
}
//主函数
void main()
{
for_time=17;
left_time=30;
Timer_Init();  //初始时间
forgo();
while(1)
{
      dispfor(for_time);
      displeft(left_time);//显示
}
}

//定时器中断
void Timer0() interrupt 1
{
TR0=0;
time_cnt++;
if(time_cnt>19)
{
      time_cnt=0;
      for_time--;
      left_time--;
      if(for_time==0&&ex)  //时间为0
      {
         if(turn_yellow) //是否变过黄灯
         {
            if(turnflag==0)    //是否转向
            {
                  for_time=10;
                  forturn();
                  turnflag=1;
            }
            else
            {
                  for_time=30;
                  left_time=17;
                  forstop();
                  ex=0;
                  turnflag=0;
                  turn_yellow=0;
            }
         }
         else
         {
            for_time=3;
            foryellow();
            turn_yellow=1;
         }
      }

      if(left_time==0&&ex==0)
      {
         if(turn_yellow) //是否变过黄灯
         {
            if(turnflag==0)    //是否转向
            {
                  left_time=10;
                  leftturn();
                  turnflag=1;
            }
            else
            {
                  for_time=17;
                  left_time=30;
                  forgo();
                  ex=0;
                  turnflag=0;
            }
         }
         else
         {
            left_time=3;
            leftyellow();
            turn_yellow=1;
         }
      }
}

TH0=15536/256;
TL0=15536%256;
TR0=1;
}

ID:350032 · 发表于 2018-6-12 22:33

图怎么没有啊？

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51单片机交通灯

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