用單片機定時器控制led

ID:380532 · 發(fā)表于 2018-8-23 22:10

#include <reg52.h>

#define u16 unsigned int
#define u8  unsigned char
u16 s=0,id=0;
sbit k1=P3^1;
sbit k2=P3^0;

sbit L0=P2^0;
sbit L1=P2^1;
sbit L2=P2^2;
sbit L3=P2^3;
sbit L4=P2^4;
sbit L5=P2^5;
sbit L6=P2^6;
sbit L7=P2^7;

void delay(u16 i);
void key();
void tim0d();

void main()
{
      tim0d();
            key();
      while(1)
      {
            key();
            if(s>=400)
            {
                     s=0;
                     id++;
            }

            switch(id)
            {
                     case 0: L0=~L0;L7=1;break;
                     case 1: L1=~L1;L0=1;break;
                     case 2: L2=~L2;L1=1;break;
                     case 3: L3=~L3;L2=1;break;
                     case 4: L4=~L4;L3=1;break;
                     case 5: L5=~L5;L4=1;break;
                     case 6: L6=~L6;L5=1;break;
                     case 7: L7=~L7;L6=1;break;
                     case 8: L6=~L6;L7=1;break;
                     case 9: L5=~L5;L6=1;break;
                     case 10: L4=~L4;L5=1;break;
                     case 11: L3=~L3;L4=1;break;
                     case 12: L2=~L2;L3=1;break;
                     case 13: L1=~L1;L2=1;break;
                     case 14: L0=~L0;L1=1; id=0;break;
            }

      }
}

void delay(u16 i)
{
      while(i--);
}

void key()
{
      if(k1==0)
      {
            delay(1000);
            if(k1==0)
            {
                     TR0=1;
            }
      while(!k1);
      }
      if(k2==0)
      {
            delay(1000);
            if(k2==0)
            {
                     TR0=0;
                     id=0;
                     s=0;
                     P2=0xfe;
            }
      while(!k2);
      }
}
void tim0d()
{
      TMOD|=0X01;
      TH0=0XFC;
      TL0=0X18;
      ET0=1;
      EA=1;
      TR0=0;
}

void tim0() interrupt 1
{
      TH0=0XFC;
      TL0=0X18;
      s++;
}

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用單片機定時器控制led

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