DS18B20温度计单片机仿真和代码

ID:155669 · 发表于 2016-12-18 18:35

DS18B20温度计代码

#include<reg51.h>
extern unsigned char code NumberData[12];
typedef unsigned char uchar;
typedef unsigned int uint;
sbit BUS=P2^6;//温度传感器接口
sbit LED_ONE = P2^0;//第一位数码管位选端口
sbit LED_TWO = P2^1;//第一位数码管位选端口
sbit LED_THREE = P2^2;//第一位数码管位选端口
sbit LED_FOUR = P2^3;//第一位数码管位选端口
volatile uchar GeWei,ShiWei,BaiWei,_Geiwei,_ShiWei;
volatile bit Convert_yes_not=0;
volatile char Negative=0;
/**********************************
数码管编码
**********************************/
code unsigned char NumberData[12] ={
0x3f,//0
0x06,//1
0x5b,//2
0x4f,//3
0x66,//4
0x6d,//5
0x7d,//6
0x07,//7
0x7f,//8
0x6f,//9
0x80,//DP
0x40 //negative
};
//延时子函数
void Delay_4xN_US(uchar us)
{
while(--us);
}
//初始化子函数
void Timer0_Init()
{
TMOD = 0x01;//定时器0模式1-16位定时器-
TCON = 0x00;//清零TCON
ET0 = 1; //允许定时器0中断
TH0 = 0x3c;//定时100ms
TL0 = 0xb0;
TR0 = 1; //启动定时器0
}
void DS18B20_Recover()
{
BUS = 1;
Delay_4xN_US(200);//4us
BUS = 0;
Delay_4xN_US(200);//800us
BUS = 1;
Delay_4xN_US(200);//800us
BUS = 1;
}
void SendProc(uchar proc)
{
bit T_bit;
uchar i=0;
for(;i<8;i++)
{
T_bit = (proc>>i)&0x01;//单位数据
BUS = 1;
Delay_4xN_US(1);//4us
BUS = 0;
BUS = T_bit;//单位数据
Delay_4xN_US(15);//60us等待时间
BUS = 1;
}
}
uchar ReadOneByte()
{
uchar i;
bit T_bit;
uchar dat=0;
for(i=0;i<8;i++)
{
BUS = 1;
Delay_4xN_US(1);//4us
BUS = 0;
BUS = 1;
T_bit = BUS;
Delay_4xN_US(15);//60us
BUS = 1;
dat |= ((uchar)T_bit)<<i;
}
return dat;
}
void LED_DATE_Convert(uchar T_L,uchar T_H)
{
uchar ZhengShu,MiddleShu;
uint XiaoShu;
if((T_H>>4)>0)//负数
{
Negative = 0xff;
MiddleShu =((~(T_L&0x0f))&0x0f)+1;
if(MiddleShu>>4>0)//有进位
{
ZhengShu = (~T_H)*16+((~T_L)>>4)+1;
XiaoShu =(MiddleShu&0x0f)*625;
}
else
{
ZhengShu = (~T_H)*16+((~T_L)>>4);
XiaoShu =(MiddleShu&0x0f)*625;
}
GeWei = ZhengShu%10;
ShiWei = (ZhengShu/10)%10;
_Geiwei= XiaoShu/1000;
_ShiWei= (XiaoShu/100)%10;
}
else//正数
{
Negative = 0x00;
ZhengShu = T_H*16+(T_L>>4);
XiaoShu =(T_L&0x0f)*625;
GeWei = ZhengShu%10;
ShiWei = (ZhengShu/10)%10;
BaiWei = ZhengShu/100;
_Geiwei= XiaoShu/1000;
_ShiWei= (XiaoShu/100)%10;
}
}
void LED_Show()
{
switch(Negative)
{
case 0x00: //正数
if(BaiWei!=0)
{
P0 = NumberData[BaiWei];
LED_ONE = 0;
Delay_4xN_US(100);//400us
LED_ONE = 1;
P0 = NumberData[ShiWei];
LED_TWO = 0;
Delay_4xN_US(100);//400us
LED_TWO = 1;
P0 = NumberData[GeWei]|NumberData[10];
LED_THREE = 0;
Delay_4xN_US(100);//400us
LED_THREE = 1;
P0 = NumberData[_Geiwei];
LED_FOUR = 0;
Delay_4xN_US(100);//400us
LED_FOUR = 1;
}
else
{
P0 = NumberData[ShiWei];
LED_ONE = 0;
Delay_4xN_US(100);//400us
LED_ONE = 1;
P0 = NumberData[GeWei]|NumberData[10];
LED_TWO = 0;
Delay_4xN_US(100);//400us
LED_TWO = 1;
P0 = NumberData[_Geiwei];
LED_THREE = 0;
Delay_4xN_US(100);//400us
LED_THREE = 1;
P0 = NumberData[_ShiWei];
LED_FOUR = 0;
Delay_4xN_US(100);//400us
LED_FOUR = 1;
}
break;
case 0xff: //负数
if(ShiWei!=0)
{
P0 = NumberData[11];
LED_ONE = 0;
Delay_4xN_US(100);//400us
LED_ONE = 1;
P0 = NumberData[ShiWei];
LED_TWO = 0;
Delay_4xN_US(100);//400us
LED_TWO = 1;
P0 = NumberData[GeWei]|NumberData[10];
LED_THREE = 0;
Delay_4xN_US(100);//400us
LED_THREE = 1;
P0 = NumberData[_Geiwei];
LED_FOUR = 0;
Delay_4xN_US(100);//400us
LED_FOUR = 1;
}
else
{
P0 = NumberData[11];
LED_ONE = 0;
Delay_4xN_US(100);//400us
LED_ONE = 1;
P0 = NumberData[GeWei]|NumberData[10];
LED_TWO = 0;
Delay_4xN_US(100);//400us
LED_TWO = 1;
P0 = NumberData[_Geiwei];
LED_THREE = 0;
Delay_4xN_US(100);//400us
LED_THREE = 1;
P0 = NumberData[_ShiWei];
LED_FOUR = 0;
Delay_4xN_US(100);//400us
LED_FOUR = 1;
}
break;
}
}
void Timer_Interrupt() interrupt 1
{
uchar T_dat_L,T_dat_H;
P0=0x00;
TH0 = 0x3c;//定时100ms
TL0 = 0xb0;
if(Convert_yes_not==0)
{
DS18B20_Recover();//复位
SendProc(0xcc);//ROM跳过指令
SendProc(0x44);//数据转换指令
Convert_yes_not=1;
}
else
{
DS18B20_Recover();//复位
SendProc(0xcc);//ROM跳过指令
SendProc(0xbe);//数据读取指令
T_dat_L = ReadOneByte();//读取数据
T_dat_H = ReadOneByte();//读取数据
LED_DATE_Convert(T_dat_L,T_dat_H);
Convert_yes_not=0;
}
}
//主函数
void main()
{
P0=0x00;
P2=0xff;
DS18B20_Recover();//复位
Timer0_Init();
EA =1;//开放中断
while(1)
{
LED_Show();
}
}

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DS18B20温度计 单片机仿真和代码

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