基于51单片机开发的温度计程序

欢迎各位大神指点，本人虚心接受。

程序功能：实时采集当前环境温度值，并显示于数码管上。文章源自微观生活（93wg.com）微观生活-https://93wg.com/3799.html

define uchar unsigned char

#define uint unsigned int

sbit DS=P2^2; //define interface

uint temp; // variable of temperature

uchar flag1; // sign of the result positive or negative

sbit dula=P2^6;

sbit wela=P2^7;

unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,

0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

unsigned char code table1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,

0x87,0xff,0xef};

void delay //delay

{

uint i;

while

{

i=200;

while

i--;

count--;

}

}

void dsreset //send reset and initialization co妹妹and

{

uint i;

DS=0;

i=103;

whilei--;

DS=1;

i=4;

whilei--;

}

bit tmpreadbit //read a bit

{

uint i;

bit dat;

DS=0;i++; //i++ for delay

DS=1;i++;i++;

dat=DS;

i=8;whilei--;

return ;

}

uchar tmpread //read a byte date

{

uchar i,j,dat;

dat=0;

for

{

j=tmpreadbit;

dat=|; //读出的数据最低位在最前面，这样恰好一个字节在DAT里

}

return;

}

void tmpwritebyte //write a byte to ds18b20

{

uint i;

uchar j;

bit testb;

for

{

testb=dat&0x01;

dat=dat>>1;

if //write 1

{

DS=0;

i++;i++;

DS=1;

i=8;whilei--;

}

else

{

DS=0; //write 0

i=8;whilei--;

DS=1;

i++;i++;

}

}

}

void tmpchange //DS18B20 begin change

{

dsreset;

delay;

tmpwritebyte; // address all drivers on bus

tmpwritebyte; // initiates a single temperature conversion

}

uint tmp //get the temperature

{

float tt;

uchar a,b;

dsreset;

delay;

tmpwritebyte;

tmpwritebyte;

a=tmpread;

b=tmpread;

temp=b;

temp<<=8; //two byte compose a int variable

temp=temp|a;

tt=temp*0.0625;

temp=tt*10+0.5;

return temp;

}

void display//显示程序

{

uchar A1,A2,A2t,A3;

A1=temp/100;

A2t=temp%100;

A2=A2t/10;

A3=A2t%10;

dula=0;

P0=table[A1];//显示百位

dula=1;

dula=0;

wela=0;

P0=0x7e;

wela=1;

wela=0;

delay;

dula=0;

P0=table1[A2];//显示十位

dula=1;

dula=0;

wela=0;

P0=0x7d;

wela=1;

wela=0;

delay;

P0=table[A3];//显示个位

dula=1;

dula=0;

P0=0x7b;

wela=1;

wela=0;

delay;

}

void main

{

uchar a;

do

{

tmpchange;

for

{

display);

}

} while;

}

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