crbc.c

AT89S51单片机控制74ls164驱动共阳数码管的源代码

#include<reg51.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit DAT=P1^1;
sbit CLK=P1^2;
uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};//0-9,-,全灭

void sendbyte(uchar byte)
{    
        uchar num,c; 
        num=tab[byte];
   for(c=0;c<8;c++)
        {
		  CLK=0;
		DAT=num&0x80;
		CLK=1;
         num<<=1;
         
         
         }

}


void delay_50ms(unsigned int t)
{
 unsigned int j;   
 for(;t>0;t--) 
  for(j=6245;j>0;j--) 
{;}
}



void display(uint i)
{ 

 
        sendbyte(i);
        
 
}

main()
{  

	unsigned char h;
	 while(1){
	 for(h=0;h<10;h++){
      	delay_50ms(1);
     	 sendbyte(h);
	 delay_50ms(10);
	 }
	 h=0;
    }
}