第六屆國二師哥18b20c程序

、主機(jī)控制DS18B20完成溫度轉(zhuǎn)換必須經(jīng)過三個(gè)步驟：初始化、ROM操作指令器操作指令。必須先啟動(dòng)DS18B20開始轉(zhuǎn)換，再讀出溫度轉(zhuǎn)換值。本程序僅掛接一個(gè)，使用默認(rèn)的12位轉(zhuǎn)換精度，外接供電電源，的溫度值字節(jié)送WDMSB單元，低位字節(jié)送WDLSB、18b20C//DQ與Vcc4.7K#include"reg52.h"#include"INTRINS.H"#include"1602.c"#defineucharunsignedchar#defineuintunsignedint//#define mand(0x01)1602sbit跳過ROM0xCC寫EEPROMvoidInit18B20(void);//初始化voidWrite18B20(ucharch);//寫數(shù)據(jù)unsignedcharRead18B20(void);//讀數(shù)據(jù)voidDelay15(ucharn);voidDelay10ms(uintdelay_num);voidDisy(void);codeuchardecimalH[]={00,06,12,18,25,31,37,43,50,56,62,68,75,81,87,93};codeucharuintResultTemperatureH,ResultTemperatureLH,ResultTemperatureLL;//整數(shù),小數(shù),小數(shù)低位uintResultSignal;//符號(hào)位{uintfor(;;Write18B20(0xCC);//跳過//Write18B20(0x4E);//寫//Write18B20(0x7f);//12bits溫度分辨率Write18B20(0xCC);//跳過Write18B20(0xCC);//跳過ROMTemL="Read18B20"();//TemH="Read18B20"();//讀溫度TemL="TemL"&0x0f;//4{TemH=~TemH; //}elseResultSignal="0";//Dis}}voidDis{uinti,j,q;LCD_write_string(0,LINE1,"Jaq121718B20{LCD_write_string(0,LINE2,"Tis:-. ");}else{LCD_write_string(0,LINE2,"Tis:+. }unsignedchar{unsignedcharch;unsignedcharq }return}voidWrite18B20(uchar{uchari;{}}void{Delay15(33);//480us/*if(DQ==1)return0;//初始化失敗elsereturn1;DQ=1;Delay15(18);}voidDelay15(uchar{do{_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();