DS18B20溫度單片機控制顯示C程序

溫度值精確到0.1度，lcd1602顯示

仿真電路圖如下

c程序如下：

#include

#define uchar unsigned char
#define uint unsigned int

sbit DQ=P3^7;//ds18b20與單片機連接口
sbit RS=P3^0;
sbit RW=P3^1;
sbit EN=P3^2;

unsigned char code str1[]={"temperature: "};
unsigned char code str2[]={" "};

uchar data disdata[5];
uint tvalue;//溫度值
uchar tflag;//溫度正負(fù)標(biāo)志

/*************************lcd1602程序**************************/
void delay1ms(unsigned int ms)//延時1毫秒（不夠精確的）
{unsigned int i,j;
for(i=0;i for(j=0;j<100;j++);
}

void wr_com(unsigned char com)//寫指令//
{ delay1ms(1);
RS=0;
RW=0;
EN=0;
P2=com;
delay1ms(1);
EN=1;
delay1ms(1);
EN=0;
}

void wr_dat(unsigned char dat)//寫數(shù)據(jù)//
{ delay1ms(1);;
RS=1;
RW=0;
EN=0;
P2=dat;
delay1ms(1);
EN=1;
delay1ms(1);
EN=0;
}

void lcd_init()//初始化設(shè)置//
{delay1ms(15);
wr_com(0x38);delay1ms(5);
wr_com(0x08);delay1ms(5);
wr_com(0x01);delay1ms(5);
wr_com(0x06);delay1ms(5);
wr_com(0x0c);delay1ms(5);
}

void display(unsigned char *p)//顯示//
{
while(*p!='