以51單片機(jī)為核心的DS18B20的數(shù)碼管顯示溫度程序+Proteus仿真.doc

/* 文件名 ： 溫度采集DS18B20.c* 描述 : 該文件實(shí)現(xiàn)了用溫度傳感器件DS18B20對(duì)溫度的采集，并在數(shù)碼管上顯示出來。* 創(chuàng)建人 ： 謝宜騰，2011年4月6日* 版本號(hào) ： 1.0*/*#include #include #define uchar unsigned char#define uint unsigned int#define jump_ROM 0xCC#define start 0x44#define read_EEROM 0xBEunsigned char TMPH,TMPL; uchar code table10 = 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;sbit DQ = P23; /DS18B20數(shù)據(jù)口sbit P30=P30;sbit P31=P31;*/#include#include #define uchar unsigned char #define uint unsigned intsbit DATA = P23; /DS18B20接入口uchar code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71;char bai,shi,ge; /定義變量/*延時(shí)子函數(shù)*/void delay(uint num)while(num-) ;/*DS18b20溫度傳感器函數(shù)*/Init_DS18B20(void) /傳感器初始化 uchar x=0; DATA = 1; /DQ復(fù)位 delay(10); /稍做延時(shí) DATA = 0; /單片機(jī)將DQ拉低 delay(80); /精確延時(shí) 大于 480us /450 DATA = 1; /拉高總線 delay(20); x=DATA; /稍做延時(shí)后 如果x=0則初始化成功 x=1則初始化失敗 delay(30);/讀一個(gè)字節(jié)ReadOneChar(void)uchar i=0;uchar dat = 0;for (i=8;i0;i-) DATA = 0; / 給脈沖信號(hào) dat=1; DATA = 1; / 給脈沖信號(hào) if(DATA) dat|=0x80; delay(8); return(dat);/寫一個(gè)字節(jié)WriteOneChar(unsigned char dat) uchar i=0; for (i=8; i0; i-) DATA = 0; DATA = dat&0x01; delay(10); DATA = 1; dat=1; delay(8);/讀取溫度int ReadTemperature(void)uchar a=0;uchar b=0;int t=0;float tt=0;Init_DS18B20();WriteOneChar(0xCC); / 跳過讀序號(hào)列號(hào)的操作WriteOneChar(0x44); / 啟動(dòng)溫度轉(zhuǎn)換Init_DS18B20();WriteOneChar(0xCC); /跳過讀序號(hào)列號(hào)的操作WriteOneChar(0xBE); /讀取溫度寄存器等（共可讀9個(gè)寄存器） 前兩個(gè)就是溫度a=ReadOneChar();/低位b=ReadOneChar();/高位t=b;t=8;t=t|a;tt=t*0.0625;t= tt*10+0.5; return(t);/*顯示子函數(shù)*/void display(int bai,int shi,int ge)P0=tablebai;/顯示千位delay(50);/一小段延時(shí)動(dòng)態(tài)顯示P3=tableshi;/顯示百位delay(50);void main()int temp;while(1) temp=ReadTemperature();/讀溫度b