/***********************************************************************************
參考網址　http://www.sensirion.com.cn/download_sd.aspx
仿真調試　濟寧職業技術學院?胡建波
***********************************************************************************/
#include??//Microcontroller?specific?library?e.g.?port?definitions
#include??//Keil?library?（is?used?for?_nop（）_?operation）
#include??//Keil?library
#include??//Keil?library
typedef?union
{?unsigned?int?i;
??float?f;
}?value;
//----------------------------------------------------------------------------------
//?modul-var
//----------------------------------------------------------------------------------
enum?{TEMPHUMI};
sbit?DATA=P1^0;
sbit?SCK=P1^1;
#define?noACK?0
#define?ACK?1

//adr?command?r/w
#define?STATUS_REG_W?0x06?//000?0011?0
#define?STATUS_REG_R?0x07?//000?0011?1
#define?MEASURE_TEMP?0x03?//000?0001?1
#define?MEASURE_HUMI?0x05?//000?0010?1
#define?RESET?0x1e?//000?1111?0

//----------------------------------------------------------------------------------
char?s_write_byte（unsigned?char?value）
//----------------------------------------------------------------------------------
//?writes?a?byte?on?the?Sensibus?and?checks?the?acknowledge
{
unsigned?char?ierror=0;
for?（i=0x80;i>0;i/=2）?//shift?bit?for?masking
{?if?（i?&?value）?DATA=1;?//masking?value?with?i??write?to?SENSI-BUS
else?DATA=0;
SCK=1;?//clk?for?SENSI-BUS
_nop_（）;_nop_（）;_nop_（）;?//pulswith?approx.?5?us
SCK=0;
}
DATA=1;?//release?DATA-line
SCK=1;?//clk?#9?for?ack
error=DATA;?//check?ack?（DATA?will?be?pulled?down?by?SHT11）
SCK=0;

return?error;?//error=1?in?case?of?no?acknowledge
}

//----------------------------------------------------------------------------------
char?s_read_byte（unsigned?char?ack）
//----------------------------------------------------------------------------------
//?reads?a?byte?form?the?Sensibus?and?gives?an?acknowledge?in?case?of?“ack=1“
{
unsigned?char?ival=0;
DATA=1;?//release?DATA-line
for?（i=0x80;i>0;i/=2）?//shift?bit?for?masking
{?SCK=1;?//clk?for?SENSI-BUS
if?（DATA）?val=（val?|?i）;?//read?bit
SCK=0;
}
DATA=!ack;?//in?case?of?“ack==1“?pull?down?DATA-Line
SCK=1;?//clk?#9?for?ack
_nop_（）;_nop_（）;_nop_（）;?//pulswith?approx.?5?us
SCK=0;
DATA=1;?//release?DATA-line
return?val;
}

//----------------------------------------------------------------------------------
void?s_transstart（void）
//----------------------------------------------------------------------------------
//?generates?a?transmission?start
//?_____?________
//?DATA:?|_______|
//?___?___
//?SCK?:?___|?|___|?|______
{
DATA=1;?SCK=0;?//Initial?state
_nop_（）;
SCK=1;
_nop_（）;
DATA=0;
_nop_（）;
SCK=0;
_nop_（）;_nop_（）;_nop_（）;
SCK=1;
_nop_（）;
DATA=1;
_nop_（）;
SCK=0;
}

//----------------------------------------------------------------------------------
void?s_connectionreset（void）
//------------------------------------------------

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-07-08?19:00??基于Proteus的溫度傳感器仿真\
?????文件????????8105??2020-07-07?18:18??基于Proteus的溫度傳感器仿真\Backup?Of?sht11_rs232.pdsbak
?????文件???????19199??2020-07-06?21:52??基于Proteus的溫度傳感器仿真\Last?Loaded?sht11_rs232.DBK
?????文件????????8104??2020-07-07?23:06??基于Proteus的溫度傳感器仿真\Last?Loaded?sht11_rs232.pdsbak
?????文件???????16449??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11
?????文件???????14452??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.LST
?????文件???????18320??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.M51
?????文件???????14816??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.OBJ
?????文件????????1031??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.Opt
?????文件????????2129??2020-07-06?21:55??基于Proteus的溫度傳感器仿真\SHT11.Uv2
?????文件????????9692??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.c
?????文件???????12634??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.hex
?????文件??????????42??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.lnp
?????文件?????????503??2020-07-06?22:12??基于Proteus的溫度傳感器仿真\SHT11.plg
?????文件????????1031??2020-07-06?21:58??基于Proteus的溫度傳感器仿真\SHT11_Opt.Bak
?????文件????????1990??2020-07-06?21:52??基于Proteus的溫度傳感器仿真\SHT11_Uv2.Bak
?????文件???????19198??2020-07-06?21:52??基于Proteus的溫度傳感器仿真\sht11_rs232.DSN
?????文件?????????795??2020-07-06?21:52??基于Proteus的溫度傳感器仿真\sht11_rs232.PWI
?????文件???????15459??2020-07-08?11:41??基于Proteus的溫度傳感器仿真\sht11_rs232.pdsprj
?????文件????????2198??2020-07-08?19:03??基于Proteus的溫度傳感器仿真\sht11_rs232.pdsprj.LAPTOP-MU7MFRH1.ASUS.workspace