原创 max6675

#include "reg52.h"
#include "absacc.h"
#include "math.h"
#define uchar unsigned char
#define uint  unsigned int
#define dm    XBYTE[0x8000]
#define wm    XBYTE[0x8100]
sbit S0=P3^1;
sbit CS="P3"^2;
sbit SCK="P3"^3;
sbit Work_Stop=P1^4;
uint Re_Convert (void); //redianou convert
void Disp_temp(void);
void Delay_50us (uint t);
uchar click="0",Time_h=0,Time_m=0,Time_l=0;
uint  disp;
uint  total,P_Temp1,P_Temp;
float S_Temp;
const uchar code tab1[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E};
const uchar code tab2[]={0x01,0x80,0x10,0x04,0x08};    //tab1为数码管的段码，tab2为数码管的位码
/******************************************************************************************************/
void main(void)                              /*主程序*/
{
  Delay_50us (100);
  Work_Stop =0;
  S0 =0;
  while(1)
  {
    P_Temp =Re_Convert();
    P_Temp1 =0.25*P_Temp;          //P_Temp =（1024*P_Temp）/4096/10
    Disp_temp();
    disp="0";
    P_Temp=0;
    P_Temp1=0;
  } 
}
/******************************************************************************************************/
void Delay_50us(uint t)                      /*延时50us程序*/
{
  uchar j; 
  for(;t>0;t--) 
  for(j=19;j>0;j--);
}
/********************************************热电偶转换程序***********************************************/
uint Re_Convert (void)
{
  uchar i;
  uint P_Temp2 =0;
  SCK =0;
  S0 =0;
  CS =0;                           
  for(i=0;i <16;i++)               
    {
      SCK =1;                       
      if(S0==1)                         
        {
          P_Temp2 =P_Temp2 | 0x01;           
        }
      Delay_50us(1);         
      SCK =0;
      Delay_50us(1);
      P_Temp2 < <=1;
    }                               
  CS =1;
  if(P_Temp2 & 0x0004) 
    {
      Work_Stop =1;
    }
  P_Temp2 =(P_Temp2 & 0x7fff) >>3;
  return(P_Temp2);
  P_Temp2 =0;
  Delay_50us(1000);
}
/********************************************显示程序***********************************************/
void Disp_temp(void)
{
  Time_h=P_Temp1/100;   
  Time_m=P_Temp1/10%10; 
  Time_l=P_Temp1%10;
  dm="tab1"[Time_h]; 
  wm="tab2"[2];
  Delay_50us(50);
  dm="tab1"[Time_m];
  wm="tab2"[3];
  Delay_50us(50);
  dm="tab1"[Time_l];
  wm="tab2"[4];
  Delay_50us(50);
}
/********************************************** END ***************************************************/