很好 学习 学习 谢谢，给大家放出楼主的源码 省点黑币：
- #include<reg51.h>
- #include<intrins.h>
- #include <string.h>
- #include <stdio.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit RS= P2^0 ; //液晶显示引脚定义
- sbit RW= P2^1 ;
- sbit EN= P2^2 ;
- uint t=0,dian=0;
- uchar LCD_LINE_ONE[16]={"tp1: "}; //定义显示屏幕
- uchar LCD_LINE_TWO[16]={"tp2: "};
- //uchar LCD_LINE_THR[16]={" "};
- int Tm;
- int fushu=0 ;
- sbit DQ= P3^3;
- static unsigned char get_serial[]={ //获取的八个DS18B20内部RAM64位序列号
- 224, 0,0,0, 184, 197, 50, 40,
- 215, 0,0,0, 184, 197, 51, 40
- // 82, 0,0,0, 184, 197, 52, 40
- // 101, 0,0,0, 184, 197, 53,40,
- //60, 0,0,0, 184, 197, 54,40,
- //11, 0,0,0, 184, 197, 55,40,
- //47, 0,0,0, 184, 197, 56,40,
- //185, 0,0,0, 184, 197, 49,40,
- };
- void delay( ms ) //用于液晶显示的延时函数
- {
- int i ;
- while(ms--)
- {
- for(i=0 ;i<5 ;i++ ) ;
- }
- }
- uchar Read_LCD_State() //读取液晶显示的状态
- {
- uchar state;
- RS=0;RW=1;EN=1;delay(1);
- state=P0;
- EN = 0;delay(1);
- return state;
- }
- void LCD_Busy_Wait() //如果忙则等待函数
- {
- while((Read_LCD_State()&0x80)==0x80);
- delay(5);
- }
- void Write_LCD_Zhilin(uchar zl) //液晶显示写指令函数
- {
- LCD_Busy_Wait();
- RS=0;RW=0;
- EN=0;
- P0=zl;
- EN=1;
- delay(1);
- EN=0;
- }
- void Write_LCD_shuju(uchar date) //液晶显示写数据函数
- {
- LCD_Busy_Wait();
- RS=1;RW=0;
- EN=0;
- P0=date;
- EN=1;
- delay(1);
- EN=0;
- }
- void LCD_INIT() //液晶显示初始化
- {
- Write_LCD_Zhilin(0x38); // 显示模式设置
- delay(1);
- Write_LCD_Zhilin(0x01); // 显示清屏
- delay(1);
- Write_LCD_Zhilin(0x06); // 光标移动设置
- delay(1);
- Write_LCD_Zhilin(0x0c); // 开及光标设置
- delay(1);
- }
- void Display_LCD_String(uchar p,uchar *s) //液晶显示写入函数
- {
- uchar i;
- Write_LCD_Zhilin(p|0x80) ; //写地址高位为一
- //Write_LCD_Zhilin(0x40|0x80) ;
- for(i=0;i<16;i++)
- {
- Write_LCD_shuju(s[i]);
- delay(1);
- }
- }
- /***************************************************************************************/
- void delays(int us) //用于DS18B20的延时函数
- { int s;
- for ( s=0; s<us; s++);
- }
- void rst(void) //DS18B20初始化
- {
- DQ = 1;
- delays(2);
- DQ = 0;
- delays(30); //精确延时 480~960us
- DQ = 1;
- delays(8);
- }
- void write(unsigned char ku) //DS18B20写函数
- {
- int i=0;
- for (i=0;i<8;i++)
- {
- DQ=0;
- DQ =ku&0x01;
- delays(3);
- DQ=1;
- ku>>=1;
- }
- }
- void match_rom(unsigned char *rom) //DS18B20匹配ROM函数
- {
- unsigned char i;
- rst(); //初始化
- write(0x55); //匹配ROM
- for(i=8;i>0;i--)
- {
- write(*(rom+i-1));
- }
- }
- unsigned int read(void) //DS18B20读函数，每次读16位
- {
- int i=0;
- unsigned int u=0;
- for (i=0;i<16;i++)
- {
- DQ=0;
- u>>=1;
- DQ=1;
- if(DQ) u|=0x8000;
- delays(4);
- }
- return (u);
- }
- int read0(unsigned char *seria) //读取对应温度值并转换函数
- {
- int temperature ;
- unsigned int tp;
- unsigned int lsb;
- rst(); //初始化
- write(0xCC); //跳过RAM
- write(0x44); //温度转换
- rst(); //再次初始化
- write(0xCC);
- match_rom(seria); //匹配ROM函数调用
- write(0xBE); //读取存储器指令
- tp=read(); //读取温度值
- if((tp&0xf800)==0xf800) //判断正负数
- {
- fushu=1 ;
- tp=~tp+1 ;
- lsb=(unsigned int)(tp*6.25);
- dian=lsb%100; //取小数部分
-
- temperature=lsb/100;
- }
- else
- {
- fushu=0;
- lsb=(unsigned int)(tp*6.25);
- dian=lsb%100;
-
- temperature=lsb/100;
- }
- return(temperature);
- }
- /*****************************************************************************************/
- void main()
- {
- uint i ;
- LCD_INIT();
- EA=0 ; //使用DS18B20禁止任何中断
- while(1)
- {
- for(i=0;i<2;i++)
- {
- Tm=read0(get_serial+i*8);
- if(i==0) //判断是第几个的数据
- {
- if(fushu==0) //判断是否加负号
- sprintf(LCD_LINE_ONE+5," %d", Tm);
- if(fushu==1)
- sprintf(LCD_LINE_ONE+5,"-%d", Tm);
- sprintf(LCD_LINE_ONE+10,".%d",dian); //加入小数部分
- Display_LCD_String(0x00,LCD_LINE_ONE);
- }
- if(i==1)
- {
- if(fushu==0)
- sprintf(LCD_LINE_TWO+5," %d", Tm);
- if(fushu==1)
- sprintf(LCD_LINE_TWO+5,"-%d", Tm);
- sprintf(LCD_LINE_TWO+10,".%d",dian);
- Display_LCD_String(0x40,LCD_LINE_TWO);
- }
- }
-
- }
- }
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谢谢
