NTC热敏电阻查表程序如何转换成温度显示? -

#include <STC15.H>
#include<math.h>
#include"intrins.h"
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define ADC_POWER 0x80
#define ADC_FLAG 0x10
#define ADC_START 0x08
#define ADC_SPEEDLL 0x00
#define ADC_SPEEDL 0x20
#define ADC_SPEEDH 0x40
#define ADC_SPEEDHH 0x60
void display(uint but);
void Time_Init(void);
void IO_Init(void);
void ADC_Init(void);
sbit b_wei=P1^0; //百位
sbit s_wei=P1^1; //十位
sbit g_wei=P1^2; //个位
uchar code LED_tk[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x40,0x46,0x79,0xff};
uint volatge=0,Tep=0,measure=38,Temperature=0,tempvalue=0;
volatile uint LS_20ms=0,Bg=0;
volatile uint Num=0,time=0,pmt=3000,temp=0,Pnet=0,Bzeep_ms=200, I_samp=0;
volatile uchar u8Temp_1=0,u8Temp_2=0,u8Temp_3=0,NK=888,ADCcount;
volatile uchar sum=0,SP_10ms=0,Su8Temp_3=0,Su8Temp_2=0,Su8Temp_1=0,Hee_1=0,Hee_2=0,Hee_3=0;
bit Vauel_play_flag=1,shan_flag=0,fan_on_flag=0,Dig_flag=0,Beesp_on_flag=0,Dai_He_flag=0,Beez_u8ge=0,Tne_Bee_flag=0;
bit Temp_flag=0,volue_flag=0;
/**************êy¾Y±í(NTC--10k--B3950)ADÖμ****************/
ulong code NTCcode[121]={
934,930,925,921,916,911,905,900,894,889, //-10-0
883,876,870,864,857,850,843,835,828,820, //0-10
812,804,796,788,779,770,762,753,743,734, //10-20
725,715,706,696,686,676,666,656,646,635, //20-30
625,615,604,594,584,573,563,552,542,532, //30-40
522,511,501,491,481,471,461,451,442,432, //40-50
423,413,404,395,386,377,368,360,351,343, //50-60
335,327,319,311,304,296,289,282,275,268, //60-70
261,255,248,242,236,230,224,218,213,207, //70-80
202,197,192,187,182,178,173,169,164,160, //80-90
156,152,148,144,140,137,133,130,127,123, //90-100
120,117,114,111,109,106,103,101,98,96,93}; //100-110
void ADC_Init()
{
P1ASF=0x30; //éèÖÃP1.4oíP1.5ÎaÄ￡Äaêäèë
ADC_RES=0;
ADC_RESL=0;
CLK_DIV=0x20;
ADC_CONTR&=~ADC_FLAG;
ADC_CONTR=ADC_POWER|ADC_SPEEDHH|ADC_START;
Delay(5);
}
uint Get_ADC(uchar channel)
{
uint b=0,c=0;
ADC_RES=0;
ADC_RESL=0;
ADC_CONTR=ADC_POWER|ADC_SPEEDHH|ADC_START|channel;
_nop_();
_nop_();
_nop_();
_nop_();
while(!(ADC_CONTR&ADC_FLAG));
ADC_CONTR&=~ADC_FLAG;
b=ADC_RES*256;
c=ADC_RESL;
b=b|c;
return b;
}
/************温度处理*************/
void fighting_0(void)
{
uchar N;
Tep=Get_ADC(4);
tempvalue=Get_Temperature(Tep);
for(N=0;N<8;N++)
{
Temperature+=tempvalue;
_nop_();
_nop_();
_nop_();
}
Temperature/=8;
}
uint Get_Temperature(uint Adc) //查表温度计算
{
uint i,tmpL,tmpH;
uint t,ftmp;
if(Adc<676)//如果小于25度向前查
for(i=25;i>0;i-)//25表示温度
{
if(Adc>NTCcode[i])
{
tmpL=NTCcode[i];//实测阻值前后温度
tmpH=NTCcode[i+1];//用于计算小数点位
t=i; //得到对应温度
i=0;
}
}
else //向后查
if(Adc>676)
for(i=25;i<121;i++)
{
if( Adc<NTCcode[i])
{
tmpH=NTCcode[i];
tmpL=NTCcode[i-1];
t=i;
i=121;
}
}
//计算小数*10整数
ftmp=(Adc-tmpL)*10/(tmpH-tmpL);
t=t*10+ftmp;
return t;
}
/*************数码管显示*************/
void display(uint but)
{
uchar i;
for(i=20;i>0;i--)
{
P3=LED_tk[but/100];
b_wei=1;
Delay(5);
b_wei=0;
P3=LED_NK[but%100/10];
s_wei=1;
Delay(5);
s_wei=0;
P3=LED_tk[but%10];
g_wei=1;
Delay(5);
g_wei=0;
}
}
void main()
{ IO_Init();
ADC_Init();
Time_Init();
while(1)
{
fighting_0();
display(Temperature);
}
}

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