#include?“ds18b20.h“


/**
??*?@brief??DS18B20?Delay?us
??*?@param??None
??*?@retval?None
??*/?
void?delay_us（uint32_t?value）
{
??uint32_t?i;
??i?=?value?*?20;
??while（i--）;
}

/**
??*?@brief??Reset?DS18B20
??*?@param??None
??*?@retval?None
??*/?
void?DS18B20_Rst（void）?????
{?????????????????
??CLR_DS18B20（）;????//DQ?=?0
??delay_us（750）;????//delay?750us
??SET_DS18B20（）;;???//DQ=1?
??delay_us（15）;?????//15us
}


/**
??*?@brief??Check?DS18B20
??*?@param??None
??*?@retval?1?:?no?exist??返回值類型說明
??*?????????0?:?exist
??*/?
uint8_t?DS18B20_Check（void）?????//通過讀取one?wire引腳的電平在一定時間內是否翻轉來檢查DS18B20是否存在或損壞?
{???
??uint8_t?retry=0;
??
???while?（DS18B20_DQ_IN&&retry<200）
??{
????retry++;
????delay_us（1）;
??};???
??if（retry>=200）return?1;
??else?retry=0;
??while?（!DS18B20_DQ_IN&&retry<240）
??{
????retry++;
????delay_us（1）;
??};
??if（retry>=240）return?1;??????
??return?0;
}

/**
??*?@brief??Read?Bit
??*?@param??None
??*?@retval?1/0
??*/?
uint8_t?DS18B20_Read_Bit（void）????????//?read?one?bit
{
??uint8_t?data;
??
??CLR_DS18B20（）;???//DQ=0
??delay_us（2）;?
??SET_DS18B20（）;;??//DQ=1?
??delay_us（12）;?//控制器采樣在15us以內
??if（DS18B20_DQ_IN）data=1;
??else?data=0;???
??delay_us（50）;??
??
??return?data;
}

/**
??*?@brief??Read?One?Byte?From?DS18B20
??*?@param??None
??*?@retval?value?
??*/?
uint8_t?DS18B20_Read_Byte（void）????//?read?one?byte
{????????
??uint8_t?ijdat;
??dat=0;
??
??for?（i=1;i<=8;i++）?
??{
????????j=DS18B20_Read_Bit（）;
????????dat=（j<<7）|（dat>>1）;
??}????????????????
??return?dat;
}

/**
??*?@brief??Write?One?Byte?To?DS18B20?
??*?@param??Data?To?Write
??*?@retval?None
??*/?
void?DS18B20_Write_Byte（uint8_t?dat）?????
{?????????????
??uint8_t?j;
??uint8_t?testb;
??/*寫時序，所有寫時序最少保持60us時間，兩個寫周期之間至少大于1us的時間*/
??for?（j=1;j<=8;j++）?
??{
????????testb=dat&0x01;?//取dat?0位的值
????????dat=dat>>1;			//dat右移一位
????????if?（testb）??		
????????{
????????????CLR_DS18B20（）;?//DS18B20_DQ_OUT=0;//?Write?1????
????????????delay_us（2）;????????????????????????????
????????????SET_DS18B20（）;?//DS18B20_DQ_OUT=1;?
????????????delay_us（60）;???????????
????????}
????????else?
????????{
????????????CLR_DS18B20（）;?//DS18B20_DQ_OUT=0;//?Write?0
????????????delay_us（60）;?????????????
????????????SET_DS18B20（）;?//DS18B20_DQ_OUT=1;
????????????delay_us（2）;??????????????????????????
????????}
????}
}

/**
??*?@brief??DS18B20?start?convert?//DS18B20開始轉換
??*?@param??None
??*?@retval?None
??*/?
void?DS18B20_Start（void）
{??????????????????????????????
????DS18B20_Rst（）;??????//復位DS18B20脈沖
????DS18B20_Check（）;???	//核對DS18B20存在脈沖
????DS18B20_Write_Byte（0xcc）;//?skip?rom?oxcc忽略ROM指令
????DS18B20_Write_Byte（0x44）;//?convert?ox44溫度轉換指令
}?


/**
??*?@brief??Initialize?DS18B20
??*?@param??None
??*?@retval?None
??*/?
uint8_t?DS18B20_Init（void）
{
??
??SET_DS18B20（）;??//one?wire引腳置1????????????????????????
??
??DS18B20_Rst（）;	//復位DS18B20
??return?DS18B20_Check（）;?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\
?????文件????????3813??2016-12-26?10:15??LCD_Display_DS18B20\.mxproject
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\BSP\
?????文件????????3971??2018-11-13?14:10??LCD_Display_DS18B20\BSP\ds18b20.c
?????文件????????1021??2018-11-09?19:27??LCD_Display_DS18B20\BSP\ds18b20.h
?????文件???????20079??2016-12-28?09:45??LCD_Display_DS18B20\BSP\ili9325.c
?????文件????????9402??2016-12-26?10:23??LCD_Display_DS18B20\BSP\ili9325.h
?????文件????????3638??2016-04-12?19:20??LCD_Display_DS18B20\BSP\lcd.h
?????文件???????25924??2018-10-30?15:59??LCD_Display_DS18B20\BSP\stm3210x_lcd.c
?????文件????????6782??2018-11-07?19:46??LCD_Display_DS18B20\BSP\stm3210x_lcd.h
?????文件???????15040??2016-12-21?22:11??LCD_Display_DS18B20\BSP\touch_panel.c
?????文件????????3832??2016-12-19?13:50??LCD_Display_DS18B20\BSP\touch_panel.h
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\Drivers\
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\Drivers\CMSIS\
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\
?????目錄???????????0??2018-11-14?13:49??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\
?????文件????????5114??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_f32.c
?????文件????????5458??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q15.c
?????文件????????4431??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q31.c
?????文件????????5090??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q7.c
?????文件????????4891??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_f32.c
?????文件????????4423??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q15.c
?????文件????????4553??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q31.c
?????文件????????4226??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q7.c
?????文件????????4613??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_f32.c
?????文件????????4912??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q15.c
?????文件????????5000??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q31.c
?????文件????????5408??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q7.c
?????文件????????5582??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_f32.c
?????文件????????5306??2016-11-10?14:56??LCD_Display_DS18B20\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_q15.c
............此處省略591個文件信息