四位数码管显示温度源码程序--STC89C52实时用PCF8591采集温度四位数码管显示

#ifndef __74HC595_H_
#define __74HC595_H_

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int 

sbit DIO = P1^0;                //串行数据输入
sbit HCRCLK  = P1^1;                //时钟脉冲信号——上升沿有效
sbit HCSCLK = P1^2;                //打入信号————上升沿有效

void LED4_Display (void);            // LED显示
void LED_OUT(uchar X);                // LED单字节串行移位函数
void LED4_data(uint num);

#endif

#include "74hc595.h"
 
unsigned char    smgduan[]={0,1,2,3,4,5,6,7,8,9};

 //-----------------------------------------------------------------------------
// 函数原形定义

unsigned char code LED_0F[];        // LED字模表

//-----------------------------------------------------------------------------
// 全局变量
uchar LED[8];    //用于LED的8位显示缓存
uint num; 

void LED4_data(uint num)
{
    LED[3]=smgduan[num/10];
    LED[2]=smgduan[num%10];
    LED[1]=17;        
    LED[0]=12;
}

void LED4_Display (void)
{
    unsigned char code *led_table;          // 查表指针
    uchar i;
    //显示第1位
    led_table = LED_0F + LED[0];
    i = *led_table;

    LED_OUT(i);            
    LED_OUT(0x01);        

    HCRCLK = 0;
    HCRCLK = 1;
    //显示第2位
    led_table = LED_0F + LED[1];
    i = *led_table;

    LED_OUT(i);        
    LED_OUT(0x02);        

    HCRCLK = 0;
    HCRCLK = 1;
    //显示第3位
    led_table = LED_0F + LED[2];
    i = *led_table;

    LED_OUT(i);            
    LED_OUT(0x04);    

    HCRCLK = 0;
    HCRCLK = 1;
    //显示第4位
    led_table = LED_0F + LED[3];
    i = *led_table;

    LED_OUT(i);            
    LED_OUT(0x08);        

    HCRCLK = 0;
    HCRCLK = 1;
}

void LED_OUT(uchar X)
{
    uchar i;
    for(i=8;i>=1;i--)
    {
        if (X&0x80) DIO=1; else DIO=0;
        X<<=1;
        HCSCLK = 0;
        HCSCLK = 1;
    }
}

unsigned char code LED_0F[] = 
{// 0    1    2    3    4    5    6    7    8    9    A    b    C    d    E    F    -   摄氏度  关  共阳极
    0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x8C,0xBF,0xC6,0xA1,0x86,0x8E,0xbf,0x9C,0xFF
};