#include?“msp430f2491.h“
#include?“DS18B20.h“
#include?“define.h“
unsigned?char??GetScratchpad[9];
//unsigned?char?GetScratchpad[9];
unsigned?char?ResultTemperatureH;??//溫度的整數(shù)部分
unsigned?char?ResultTemperatureLH;??//溫度的小數(shù)部分（高位）
unsigned?char?ResultTemperatureLL;??//溫度的小數(shù)部分（低位）
?unsigned?char?decimalH[16]={00061218253137435056626875818793};
unsigned?char?decimalL[16]={00255075002550750025507500255075};
unsigned?char?dispcode[]={0x3f0x060x5b0x4f?
						0x660x6d0x7d0x07?
						0x7f0x6f0x770x7c?
						0x390x5e0x790x710x000x40};?	??//0x40??負
unsigned?char?dispbitcode[]={0xfe0xfd0xfb0xf7?
					0xef0xdf0xbf0x7f};???//?數(shù)碼管為共陽極數(shù)碼管，此數(shù)組存儲的是陰極的管腳數(shù)據(jù)，依次可以點亮一個數(shù)碼管對應P2口
unsigned?char?dispbuf[8]={00000000};?
unsigned?char?DS18B20_Init_old（void）{
??INT8U?result;
???DS18B20_DIR?|=?DS18B20_DQ;???????//?ow?output
?DS18B20_OUT?|=DS18B20_DQ;
?_NOP（）;
??DS18B20_OUT?&=?~DS18B20_DQ;??????//?DS18B20_DQ=0;
??Delay（90）;
??????????????????????????????????//?Bus?master?pulling?low?480us?minimum;
DS18B20_OUT?|=?DS18B20_DQ;??????//?DS18B20_DQ=1;
DS18B20_DIR?&=?~DS18B20_DQ;
//Delay（8）;?????????????????????????//?Resister?pull?up?15-60us;
????????//?ow?input
??result?=?DS18B20_IN?&?DS18B20_DQ;
while（DS18B20_IN?&?DS18B20_DQ）
{
_NOP（）;
?
}
?
??DS18B20_DIR?|=?DS18B20_DQ;???????//?ow?output
????Delay（19）;?????????????????????//?End?of?timeslot?total?480us;
??DS18B20_OUT?|=DS18B20_DQ;
????return（result）;??????????????????//?any?1?wire?device??result:=1?no?devide;??result:=0?have?device;
}


unsigned?char?DS18B20_ReadByte（void）{
??INT8U?i;
??INT8U?result=0;
????DS18B20_DIR?|=?DS18B20_DQ;
???
??for（i?=?8;?i?>0;?i--）
??{
????DS18B20_OUT?|=?DS18B20_DQ;
????_NOP（）;
??//??result>>1;
????DS18B20_OUT?&=?~DS18B20_DQ;
????
????_NOP（）;
????
????DS18B20_OUT?|=?DS18B20_DQ;
????_NOP（）;
????_NOP（）;
?????_NOP（）;
????_NOP（）;
????DS18B20_DIR?&=~DS18B20_DQ;
?
????if（P4IN&BIT3）
??????result?|=（1<????else
??????result?&=~（1<?????Delay（3）;
????DS18B20_DIR?|=?DS18B20_DQ;
??}
??
??return（result）;???????//?return?the?result?of?the?1-wire?device;
}//Read?a?byte?from?the?1-wire?bus;
void?DS18B20_WriteByte（INT8U?oww_dat）
{
??INT8U?i;
?DS18B20_DIR?|=?DS18B20_DQ;
??for（i?=?0;?i???{
???????
???????
????if（oww_dat?&?0X01）
????{
??????DS18B20_OUT?|=?DS18B20_DQ;
????????_NOP（）;
?????DS18B20_OUT??&=~DS18B20_DQ;
?????_NOP（）;
?????
?????DS18B20_OUT?|=DS18B20_DQ;
?????Delay（8）;
????}?
????else
????{?
???????DS18B20_OUT?|=?DS18B20_DQ;
????????_NOP（）;
??????DS18B20_OUT??&=~DS18B20_DQ;
???????Delay（8）;
??????_NOP（）;
??????_NOP（）;
???????
????}
?????//?Delay（8）;
??????DS18B20_OUT?|=DS18B20_DQ;
??????_NOP（）;
??????oww_dat>>=1;
??}
???
}//Write?a?byte?to?the?1-wire?bus;

unsigned?char?DS18B20_ReadTemp（void）
{?INT8U??tempHtempL;
??INT8U?X=0;
?DS18B20_Init_old（）;
?DS18B20_WriteByte（SkipRom）;
?_NOP（）;
?//_NOP（）;
?//_NOP（）;
??//There?is

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

?????文件???????5722??2011-04-26?22:34??DS18B20.c

?????文件????????988??2011-04-26?22:35??DS18B20.h

-----------?---------??----------?-----??----

?????????????????6710????????????????????2