#include“18b20.h“

sbit?DQ=P2^3;?//數據通信串口

/************************************************
函數功能：延時子函數
入口參數：time
出口參數：無
**************************************************/
void?delay18b20（uint?time）
{
?	uchar?n;
	for（?n=0;n}

/**************************************************
函數功能：DS18B20初始化子程序
入口參數：無
出口參數：無
**************************************************/
uchar?Init_DS18B20（void）
{
	uchar?x;
	DQ=0;??????????????//電平拉低，發送復位脈沖
	delay18b20（29）;?????????//延時480-960us
	DQ=1;
	delay18b20（3）;??????????//電平拉高后，需等待15-60us
	x=DQ;
	delay18b20（25）;?????????//發送存在脈沖需要60-240us
	return?（x）;????????//返回值x位0，則DS18B20準備好
}
/***************************************************
函數功能：從DS18B20讀出一個字節
入口參數：無
出口參數：dat
*****************************************************/
uint?Read（void）????????????????????
{
?uchar?idat;
?for?（i=8;i>0;i--）?//每條數據位一字節，8位
?{
??dat>>=1;//從低位讀起
??DQ?=?0;????????????????
??_nop_（）;_nop_（）;_nop_（）;_nop_（）;//延時后拉高
??DQ?=?1;???????????????
??if（DQ）//次判斷讀取‘1’
??{
???dat|=0x80;
??}
??delay18b20（4）;//次延時必須有，采樣需要45us???????????
??}
??return（dat）;
}

/***************************************************
函數功能：向DS18B20寫一字節數據
入口參數：dat
出口參數：無
****************************************************/
void?Write（char?dat）???????????
{
?uchar?i;
?for?（i=8;?i>0;?i--）??
?{
??DQ?=?0;?????????
??_nop_（）;????????????
??DQ?=?dat&0x01;
??delay18b20（8）;???????
??DQ?=?1;
??_nop_（）;
??dat>>=1;
??}
}
/**************************************************
函數功能：從DS18B20讀取溫度值
入口參數：無
出口參數：temperature
**************************************************/
float?CatchTemper（void）
{	
?uchar?tempLtempH;
	uint?temperature;
	float?tem;

	Init_DS18B20（）;?//初始化
	Write（0xcc）;????//跳過讀序列號的操作
	Write（0x44）;	???//啟動溫度轉換
	Write（0x4e）;
	Init_DS18B20（）;	//初始化
	Write（0xcc）;	
	Write（0xbe）;	???//讀溫度寄存器命令
	tempL=Read（）;	??//讀出溫度的低位
	tempH=Read（）;	??//讀出溫度的高位
	temperature=tempH;		??????//將高位放在i的低位
	temperature<<=8;			???????//將低位移至高位
	temperature|=tempL;		?????//將低位放在i的低位
	if（（tempH&0x08））//判斷符號位，溫度為負值，則執行
	{
		temperature=0xffff-temperature+1;//二進制負數求原碼
		tem=temperature*0.0625;
		tem+=0x8000;
	}
	else?tem=temperature*0.0625;
	return?tem;		
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1054??2012-06-13?19:16??TemCatch\TemCatch.PWI

?????文件?????141018??2012-06-13?19:06??TemCatch\Last?Loaded?TemCatch.DBK

?????文件?????141018??2012-06-13?19:06??TemCatch\TemCatch.DSN

?????文件?????708096??2012-06-24?09:38??TemCatch\徐龍秋?信息09級1班?27.doc

?????文件?????????50??2012-06-23?12:35??TemCatch\PCB\TemCatch.PrjPCBStructure

?????文件??????37500??2012-06-23?12:37??TemCatch\PCB\TemCatch.PrjPCB

?????文件?????460800??2012-06-23?14:42??TemCatch\PCB\TemCatch.PcbDoc

?????文件?????233984??2012-06-23?14:42??TemCatch\PCB\TemCatch.SchDoc

?????文件???????2595??2012-06-22?17:20??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?SCH?ECO?2012-6-22?17-20-24.LOG

?????文件?????????68??2012-06-22?17:21??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?SCH?ECO?2012-6-22?17-21-07.LOG

?????文件?????????67??2012-06-22?17:23??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?SCH?ECO?2012-6-22?17-23-31.LOG

?????文件???????8362??2012-06-22?17:23??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?17-23-47.LOG

?????文件????????330??2012-06-22?17:36??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?SCH?ECO?2012-6-22?17-36-21.LOG

?????文件???????1382??2012-06-22?17:36??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?17-36-31.LOG

?????文件?????????66??2012-06-22?17:48??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?SCH?ECO?2012-6-22?17-48-21.LOG

?????文件????????271??2012-06-22?17:48??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?17-48-31.LOG

?????文件?????????27??2012-06-22?18:03??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?18-03-12.LOG

?????文件?????????27??2012-06-22?18:04??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?18-04-33.LOG

?????文件????????505??2012-06-22?18:05??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?18-05-07.LOG

?????文件??????10399??2012-06-22?18:05??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-22?18-05-44.LOG

?????文件???????1373??2012-06-23?12:20??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-23?12-20-43.LOG

?????文件????????121??2012-06-23?12:21??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-23?12-21-35.LOG

?????文件???????1046??2012-06-23?12:35??TemCatch\PCB\Project?Logs?for?TemCatch\TemCatch?PCB?ECO?2012-6-23?12-35-40.LOG

?????文件???????4053??2012-06-22?11:05??TemCatch\PCB\History\TemCatch.~（1）.PrjPCB.Zip

?????文件???????4202??2012-06-22?11:09??TemCatch\PCB\History\TemCatch.~（2）.PrjPCB.Zip

?????文件???????1465??2012-06-22?11:40??TemCatch\PCB\History\TemCatch.~（1）.SchDoc.Zip

?????文件??????25949??2012-06-22?11:40??TemCatch\PCB\History\TemCatch.~（2）.SchDoc.Zip

?????文件??????25949??2012-06-22?11:40??TemCatch\PCB\History\TemCatch.~（3）.SchDoc.Zip

?????文件??????25949??2012-06-22?11:40??TemCatch\PCB\History\TemCatch.~（4）.SchDoc.Zip

?????文件??????25949??2012-06-22?11:40??TemCatch\PCB\History\TemCatch.~（5）.SchDoc.Zip

............此處省略169個文件信息