单片机呼吸灯加交通灯

ID:864715 · 发表于 2020-12-29 09:32

/*
呼吸灯加交通灯
J9跳线帽不能拔掉
*/
#include <reg52.h>
sbit Red = P1^0;
sbit Yellow = P1^1;
sbit Green = P1^2;
sbit DU  = P2^6; //数码管段选
sbit WE  = P2^7; //数码管位选

unsigned char const discode[] ={ 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F,0x6F,0x40,0x00/*-*/};
unsigned char const positon[2]={ 0xfe,0xfd};
unsigned char disbuff[2]          ={ 0,0};
unsigned char pwm_left_val = 0;//
unsigned char pwm_t;//周期
unsigned char posit=0;
unsigned int Dbuf;//
bit flag = 0;

//毫秒级延时
void delay(unsigned int z)
{
      unsigned int x,y;
      for(x = z; x > 0; x--)
            for(y = 114; y > 0 ; y--);
}
void Display(void)                               //扫描数码管
{
      DU = 0;
      if(posit==0)
      {P0=(discode[disbuff[posit]]);}
      else
      {P0=discode[disbuff[posit]];}
      DU = 1;
      DU = 0;
      WE = 0;
      P0=positon[posit];
      WE=1;
      WE=0;
      if(++posit>=2)
      posit=0;
}

//定时器0中断
void timer0() interrupt 1
{
      pwm_t++;
      if(pwm_t == 255)
            pwm_t = P1 = 0;
      if(pwm_left_val == pwm_t)
                     P1 = 0XFF;
}

void  timer1()  interrupt 3                //T1中断用来扫描数码管和计2MS启动模块
{
      TH1=0xf8; //2ms
      TL1=0xCC;
      if(flag == 0)
      {
            disbuff[0]=Dbuf % 100 / 10;
            disbuff[1]=Dbuf % 10;
      }
      Display();
}
void main()
{
      EA       = 1;//总中断允许

      while(1)
      {
            unsigned char i, delay_sec;
            TMOD |= 0x02;//T0 8位自动重装模块
            TH0 = 225;
            TL0 = 225;//11.0592M晶振下占空比最大比值是256,输出100HZ
            TR0 = 1;//启动定时器0
            ET0 = 1;//允许定时器0中?
            for(i=0; i < 4; i++)
            {
                     while(pwm_left_val != 255)
                     {
                              ++pwm_left_val;
                              delay(1);
                     }
                     while(pwm_left_val != 0)
                     {
                              --pwm_left_val;
                              delay(1);
                     }
            }
            ET0 = 0;
            TR0 = 0;
            P1 = 0XFF;
            delay(2000);

            TMOD |= 0x10;//T1 16位定时
            TH1=0xf8; //2ms
            TL1=0xCC;
            ET1=1;                         //允许T1中断
            TR1=1;                         //开启定时器1

            while(1)
            {
                     delay_sec = 10;
                     Red = 0;
                     do{
                              Dbuf = delay_sec;
                              delay(1000);
                     }while(--delay_sec);
                     Red = 1;
                     delay_sec = 10;//10sec
                     Green = 0;
                     do{
                              if(delay_sec <= 3)//绿灯闪烁
                              {
                                    Green = 0;
                                    Dbuf = delay_sec;
                                    delay(500);
                                    flag = 1;
                                    disbuff[0] = 11;
                                    disbuff[1] = 11;
                                    Green = 1;
                                    delay(500);
                                    flag = 0;
                              }
                              else
                              {
                                    Dbuf = delay_sec;
                                    delay(1000);
                              }
                     }while(--delay_sec);
                     Green = 1;
                     delay_sec = 3;//
                     Yellow = 0;
                     do{
                              Dbuf = delay_sec;
                              delay(1000);
                     }while(--delay_sec);
                     Yellow = 1;
            }

      }
}

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