單片機控制74hc595數碼管靜態顯示會閃?

ID:164604 · 發表于 2019-3-18 07:51

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar count,second,min;
sbit lclk=P1^0;
sbit sclk=P1^1;
sbit Data=P1^2;
uchar dis[4];
uchar code displayhex[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
               0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E};
void delay(uint z)
{
      uint x,y;
      for(x=z;x>0;x--)
         for(y=100;y>0;y--);
}
void send595(uchar *pdat)
{
      uchar i,j;
      j=0x80;
      for(i=0;i<8;i++)
      {
            if((*pdat)&j) Data=1;
else Data=0;
sclk=0;
sclk=1;
            j>>=1;
sclk=0;
      }
}
void display595( uchar *pdat)
{
      uchar i;
      for(i=0;i<4;i++)
      {
            lclk=0;
      send595(&displayhex[*(pdat+i)]);
            lclk=0;
            lclk=1;
      }
}
void init()
{
      TMOD=0X01;
      TH0=(65536-50000)/256;
      TL0=(65536-50000)%256;
      EA=1;
      ET0=1;
      TR0=1;
}
void main()
{
      init();
      while(1)
      {
      if(count==20)
      {
               count=0;
               second++;
               if(second==60)
               {
                     second=0;
                     min++;
                     if(min==24)
                     {
                              min=0;
                     }

   }

      }
         dis[0]=second%10;
         dis[1]=second/10;
         dis[2]=min%10;
         dis[3]=min/10;
         display595(dis);
         delay(50);
      }
}

void timer0() interrupt 1
{
      TH0=(65536-50000)/256;
      TL0=(65536-50000)%256;
      count++;
}