51单片机74hc595静态显示源程序 -

标题: 51单片机74hc595静态显示源程序 [打印本页]

作者: 曹斌01 时间: 2018-8-19 18:14
标题: 51单片机74hc595静态显示源程序
电路原理图如下：

程序

#include<reg51.h>

#define uchar unsigned char
#define uint unsigned int

/******************0****1****2****3****4****5****6****7****8****9****/

uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //共阳极

sbit HC595SH  =P1^1;       //数据输入时钟线　
sbit HC595ST  =P1^2;    //输出存储器锁存时钟线
sbit HC595Data=P1^0;    //串行数据输入

uchar ge,shi,bai,qian;

void HC595SendByte(uchar c)
{
      uchar i,num;
      num=tab[c];
      for(i=0;i<8;i++)
      {
            HC595SH=0;
      //       if((num&0x80)==0x80)
            if((num&0x80))
            HC595Data=1;
            else
            HC595Data=0;

            HC595SH=1;
      }
}
void Display(uint number)
{
      uint ge,shi,bai,qian;

      ge=number%10;
      shi=number%100/10;
      bai=number%1000/100;
      qian=number/1000;

      HC595ST=1;
      HC595SendByte(ge);
      HC595SendByte(shi);
      HC595SendByte(bai);
      HC595SendByte(qian);
      HC595ST=0;

}
void delay(uint a)
{
  while(a--);
}

void main()
{
      uint b;
      while(1)
      {
      Display(b);
delay(10000);
      b+=1;
      if(b==9999)b=0;
//       while(1);
      }
}

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