用1602顯示18b20溫度的程序

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(jī)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!='