less2-1a.c

74HC595 驱动两个数码管0-99.C51..已测试通过

#include<reg51.h>
#include <INTRINS.H>
#define uint unsigned int
#define uchar unsigned char
//#define nop() _nop_();_nop_();
void delay(uint);

sbit ds=P1^4;
sbit shcp=P1^5;
sbit stcp=P1^6;
sbit oe=P1^7;
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++)       // 一位一位的发送数据
        {
         shcp=0;
         ds=num&0x80;
         num=num<<1;
         
         shcp=1;
         }
        
}

void out595(void)
{
        stcp=0;
        delay(10);
        stcp=1;
		oe=0;
}

void display(uchar word)  //显示十位和个位
{
 uchar i,j;
 i=word/10;          //十位
 j=word-10*i;        //个位
 sendbyte(j);     
 sendbyte(i);
 out595();
}


main()                          
{   
    while(1)
    {
     uchar n;
     for(n=0;n<100;n++) //显示0到99 
     {
     display(n);
     out595();
     delay(600);
     }
    }
  
}
  
void delay(uint z)
{
	uint x,y;
	for(x=100;x>0;x--)
		for(y=z;y>0;y--);
}