自己做了一个呼吸灯，给大家分享一下程序，用了PWM调节频率，还有一个用蓝牙点灯程序

ID:219350 · 发表于 2017-7-17 20:51

#include<reg51.h>
/*-----------定义单片机引脚-----*/
sbit LED0=P1^0;
sbit LED1=P1^1;
sbit LED2=P1^2;
sbit LED3=P1^3;
sbit LED4=P1^4;
sbit LED5=P1^5;
sbit LED6=P1^6;
sbit LED7=P1^7;

void Delay(unsigned int t); //函数声明
unsigned int z,y;
void main (void)//主函数
{
unsigned int CYCLE=500,PWM_LOW=0;//定义周期并赋值
while (1)       //主循环
{

/*--------整排LED灯呼吸---------*/
P1=0x00;
Delay(500); //加延时，可以看到熄灭的过程（下面程序同理）
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)    //PWM_LOW表示低
{
P1=0x00;
Delay(PWM_LOW);
P1=0xff;
Delay(CYCLE-PWM_LOW);
}
// P1=0xff;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--) //与逐渐变亮相反的过程
{
   P1=0x00; //点亮LED
   Delay(PWM_LOW);
   P1=0xff; //熄灭LED
      Delay(CYCLE-PWM_LOW); //主循环中添加其他需要一直工作的程序，延时长度，600次循环中从599减至1
}

/*--------第一颗LED灯呼吸---------*/
LED0=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
LED0=0;
Delay(PWM_LOW);
LED0=1;
Delay(CYCLE-PWM_LOW);
}
LED0=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED0=0;
   Delay(PWM_LOW);
   LED0=1;
      Delay(CYCLE-PWM_LOW);
}

/*--------第二颗LED灯呼吸----------*/
LED1=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED1=0;
   Delay(PWM_LOW);
   LED1=1;
      Delay(CYCLE-PWM_LOW);
}
LED1=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
LED1=0;
Delay(PWM_LOW);
LED1=1;
Delay(CYCLE-PWM_LOW);
}

/*--------第三颗LED灯呼吸----------*/
LED2=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED2=0;
   Delay(PWM_LOW);
LED2=1;
Delay(CYCLE-PWM_LOW);
}
LED2=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED2=0;
   Delay(PWM_LOW);
   LED2=1;
            Delay(CYCLE-PWM_LOW);
   }

/*--------第四颗LED灯呼吸----------*/
LED3=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
      LED3=0;
     Delay(PWM_LOW);
LED3=1;
      Delay(CYCLE-PWM_LOW);
}
LED3=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED3=0;
   Delay(PWM_LOW);
   LED3=1;
            Delay(CYCLE-PWM_LOW);
      }

/*--------第五颗LED灯呼吸----------*/
LED4=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED4=0;
   Delay(PWM_LOW);
   LED4=1;
            Delay(CYCLE-PWM_LOW);
      }
LED4=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED4=0;
   Delay(PWM_LOW);
   LED4=1;
            Delay(CYCLE-PWM_LOW);
      }

/*--------第六颗LED灯呼吸----------*/
LED5=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED5=0;
   Delay(PWM_LOW);
   LED5=1;
            Delay(CYCLE-PWM_LOW);
      }
LED5=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED5=0;
   Delay(PWM_LOW);
   LED5=1;
            Delay(CYCLE-PWM_LOW);
      }

/*--------第七颗LED灯呼吸----------*/
LED6=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED6=0;
   Delay(PWM_LOW);
   LED6=1;
            Delay(CYCLE-PWM_LOW);
      }
LED6=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED6=0;
   Delay(PWM_LOW);
   LED6=1;
            Delay(CYCLE-PWM_LOW);
      }

/*--------第八颗LED灯呼吸----------*/
LED7=1;
Delay(500);
for(PWM_LOW=1;PWM_LOW<CYCLE;PWM_LOW++)
{
   LED7=0;
   Delay(PWM_LOW);
   LED7=1;
            Delay(CYCLE-PWM_LOW);
      }
LED7=0;
for(PWM_LOW=CYCLE-1;PWM_LOW>0;PWM_LOW--)
{
   LED7=0;
   Delay(PWM_LOW);
   LED7=1;
            Delay(CYCLE-PWM_LOW);
      }

P1=0x00;
for(z=500;z>0;z--)
for(y=110;y>0;y--);
P1=0xff;
for(z=500;z>0;z--)
for(y=110;y>0;y--);
P1=0x00;
for(z=500;z>0;z--)
for(y=110;y>0;y--);
P1=0xff;
for(z=500;z>0;z--)
for(y=110;y>0;y--);
}
}
void Delay(unsigned int t)
{
while(--t);
}