基于51單片機(jī)讀取18B20序列號代碼

.///主函數(shù)#include"ds18b20.h"#include"lcd12864.h"#include"delay.h"voidmain<>{ init_lcd<>; dis_readnumber<>;//顯示序列號 delay<1000>; while<1> { change_ds18b20<>; display_lcd12864<value>; }}//讀取序列號// 溫度傳感器設(shè)置模塊#include"ds18b20.h"#include"delay.h"uintvalue;//sbitDQ=P2^0；voiddelay_us<uchart>//微妙延時{ while<t-->;}voidinit_ds18b20<> //數(shù)據(jù)初始化{ DQ=1; delay_us<4>; DQ=0; delay_us<80>; DQ=1; delay_us<200>;}voidwrite_ds18b20<uchardat>//寫數(shù)據(jù){ uchari; for<i=0;i<8;i++> { DQ=0; DQ=dat&0x01; delay_us<15>; DQ=1; dat=dat>>1; } delay_us<10>;}ucharread_ds18b20<>//讀數(shù)據(jù){ uchari=0,readat=0; for<i=0;i<8;i++> { DQ=0; readat=readat>>1;//八位全部都是0,向右移一位后,仍然全是0 DQ=1; if<DQ>//如果DQ為1,readat進(jìn)行或運(yùn)算,如果為0,則子語句不執(zhí)行,直接for循環(huán)此時采集的數(shù)據(jù)是0 readat=readat|0x80;//此時最高位為1 ,然后再進(jìn)行for循環(huán)最高位成為第七位,依次往復(fù) delay_us<10>; } returnreadat;}/***************************************************************************//*********************************************************************************/ucharchange_ds18b20<>{ uchartl,th; init_ds18b20<>; //初始化 write_ds18b20<0xcc>;//跳過rom write_ds18b20<0x44>;//啟動ds18b20進(jìn)行溫度轉(zhuǎn)換,結(jié)果存入9字節(jié)ram中 init_ds18b20<>; //？缺少不可執(zhí)行 write_ds18b20<0xcc>; write_ds18b20<0xbe>;//啟動讀暫存器。讀部ram中9字節(jié)溫度數(shù)據(jù) tl=read_ds18b20<>; th=read_ds18b20<>; value=th; value=value<<8; value=value|tl; value=value*<0.0625*10>; returnvalue;}// 溫度傳感器設(shè)置模塊頭文件#ifndef__DS18B20_H__#define__DS18B20_H__#include<reg52.h>#defineuintunsignedint#defineucharunsignedcharsbitDQ=P3^7;externuintvalue;voiddelay_us<uchart>;//微妙延時voidinit_ds18b20<>; //數(shù)據(jù)初始化voidwrite_ds18b20<uchardat>;//寫數(shù)據(jù)ucharread_ds18b20<>;//讀數(shù)據(jù)ucharchange_ds18b20<>;#endif//顯示模塊//液晶12864顯示模塊#include"lcd12864.h"#include"ds18b20.h"#include"delay.h"http://sbitlcdrs=P2^5; 引腳的定義//sbitlcdrw=P2^6;//sbitlcden=P2^7;ucharwendu[]={"溫度測點"};ucharsave_number[8];voidwrite_<uchar>{ lcdrs=0;//寫指令 P2=; delay<5>; lcden=1; delay<5>; lcden=0;}voidwrite_dat<uchardat>{ lcdrs=1;//寫數(shù)據(jù) P2=dat; delay<5>; lcden=1; delay<5>; lcden=0;}voidinit_lcd<>{ lcden=0; lcdrw=0; write_<0x30>;//基本指令操作 delay<5>; write_<0x0c>;//開顯示,關(guān)光標(biāo) delay<5>; write_<0x01>;//清屏 delay<5>;}/*************************************************************///// 顯示溫度///**************************************************************/voiddisplay_lcd12864<uintvalue>{ uchari; write_<0x80>; for<i=0;i<8;i++> { write_dat<wendu[i]>; delay<3>; } write_dat<0x41>; write_dat<0x3a>; write_dat<value/100+0x30>; write_dat<value%100/10+0x30>; write_dat<0x2e>; write_dat<value%10+0x30>;}/***********************************************************///// 讀序列號///************************************************************/voiddis_readnumber<> { uchari,temp; init_ds18b20<>; write_ds18b20<0x33>; //讀rom即rom中的編碼 for<i=0;i<8;i++> { save_number[i]=read_ds18b20<>;//保存序列號 }write_<0x88>; for<i=0;i<8;i++> { temp=save_number[i]>>4; if<temp<10> { write_dat<0x30+temp>; } else { write_dat<0x37+temp>; } temp=save_number[i]&0x0f; if<temp<10> { write_dat<0x30+temp>; } else { write_dat<0x37+temp>; } }}//顯示模塊頭文件#ifndef__LCD12864_H__#define__LCD12864_H__#include<reg52.h>#defineuintunsignedint#defineucharunsignedchar//sbitlcdrs=P2^5;//sbitlcdrw=P2^6;//sbitlcden=P2^7;sbitlcdrs=P0^0;sbitlcdrw=P0^1;sbitlcden=P0^2;externucharsave_number[];externvoidwrite_<uchar>;externvoidwrite_dat<uchardat>;externvoidinit_lcd<>;externvoiddisplay_lcd12864<uintvalue>;externvoiddis_readnumber<>;#endif//延時函數(shù)/***********延時函數(shù)****ms***********/#include"delay.h"voi